Starting switch for electric motors

Abstract

Claims

Dec. 11, 1923. v 1,476,777 E. E. TAEUBERT 1 STARTING SWITCH FOR ELECTRIC MOTORS Filed March so. 1920 i 5 Sheets-Sheet 1 13/ I H W Hm o k A 4" W 1 4a 10 j M J10 J12 l j in .kr I 16 k 10 11 If jib Dec. 11 1923. E. E. TAEUBERT STARTING SWITCH FQR ELECTRIC MUTORS Filed March 30, 1920 H lllllllnllllllll 5 Sheets-Sheet 2 i INVENTOR. 4 13 1 mat/242776261165 A ATTORN s.- E.E.TAEUBERT STARTING SWITCH FOR ELECTRTC MOTORS Dec. 11, 1923. 1920 5 sheets sheet 5 Filed March 30. lmma: INVENTOR. Dec. 11, 1923. 1,476,777 ' E. E. TAEUBERT STARTING SWITCH FOR ELECTRIC MOTORS Filed March 50, 1920 5 Sheets-Sheet 4 IN V EN TOR. jafirzurzdlffieubenzj BY ATTORNEYS} Dec. 11, 1923. 1,476,777 E. E. ,TAEUBERT STARTING SWITCH FOR ELECTRIC MOTORS Filed March 30. 1920 5 Sheets-Sheet 5 $9.15 J fllllllnnu J7 -4 A INVENTOR. MumdEZkezfie/Zj A TTORNE YS. Patented Dec. 11, 1923. UNITED- STATES PATENT O FFICE. EDMUND E. TAEUBERT, 01 I08 ANGELES, CALIFORNIA, ASSIGNOR TO LEO M. HARVEY, OF LOS ANGELES, CALIFORNIA. STARTING SWITCH FOR ELECTRIC MOTORS. Application filed March 30, 1920. Serial No. 372,375. To all whom it may concern: I serving to 'deenergize the operating magnet, Be it known that I. EDMUND E. TAEU- together with means whereby saidmagnet near, a citizen of the United States, and a may not again be energized until the mad resident of Los Angeles, in the county of ual operation of the starting button; thus 8 Los Angeles, State of California, have inproviding no voltage protection for the vented new and useful Improvements in switch. Starting Switches for Electric Motors, of Fourth: to eliminate noise asfar as possiwhich the following is a specification. ble. which in devices of this character, espe- This invention relates in general to a cially in the case of alternating current 10 form of electric switch generally known as switches, employ magnets of the usual charthe magnetic type, which is adapted to be acter. To this end I have provided a speinterposed, as in the case of all switches, in cial form of alternating current magnet, in the power circuit between the main source which entirely new principles are employed, of current supply and the motor, and it reso as to eliminate vibration and singing lates more particularly to a switch having so common to alternating current magnets, certain automatic features whereby the as stated..- regulation of the electric current may be Fifth: the complete enclosure of all workeflected under all conditions and in all ciring parts of the switch in a heavy sheet iron cumstances, without damage or injury to base, suitably mounted for convenience and the elements included in the circuit. so arranged that the opening of the case The main object of my invention is to will automatically open the switch and open provide an electric switch of the magnetic the operating magnet circuit until the case type adapted to be connected with and to is again closed. With the case and the function between the power line, or source switch open, as stated, the fuse clips are of supply, and the service line in which dead, thus rendering it possible to renew may be included an electric motor. or other the fuse without danger of shock. power consuming element, having certain Sixth: the provision of a simple, connovel structural characteristics, arrangevenient and effective design of switch, case ments of parts and features whereby the and parts, easily accessible for the purpose following subsidiary objects may be accomof cleaning, renewing or for any other purplished: pose; and the arrangement of all parts, First: to allow the starting current from wires, etc., in such a manner that they may the power line to the motor to flow without be readily connected to the parts within the interruption for a necessary length of time case, or withdrawn and disconnected therewithout the necessity of adjustment, so that from. the increase of current itself will retain the In addition to the above general objects, switch in starting position until the current some of the specific objects of invention has dropped to normal, at which time the are: switch will be automatically operated so as .The provision of a switch having fuses to include the fuses in the motor current. connected with the power'line and a mov- Second: to provide, in such a switch, proable switch contact member arranged for tection against overloading of the circuit, initial connection with said power line ex by the intrusion in said circuit of standard clusively of said fuses and finally movable cartridge fuses adapted to adequately prointo and for connection with said power 1 tcct against excessive current. line inclusively of said fuses. Third: to provide means whereby the The provision, in a switch of the charmain contact members of the switch will acter described, of duplex power line conautomatically be disconnected by gravity tacts, movable switch members arranged when the power supply is off for any reason, for initial contact with one and final contl e failure of the voltage. in the power line tact with the other contacts, electric fuses tact successively therewith, and a suitable magnet for effecting the operation of said movable member, so as to provide an initial power circuit excluding the line fuses and a final circuit including said fuses. The provision of a switch of the character stated embodying an alternating magnet and a contact member operated thereby, for initially operating said contact member to a partial extent and subsequently operating the same/to a maximum extent for, respectively, cutting out and in the fuses of the line for the purposes mentioned. Other objects may appear as the description progresses. Referring to the drawings of my invention, forming a part of this application and appended hereto, I have shown one practical embodiment of my invention, which is capable of substantial modification and alteration, according to the necessities of each occasion. In said drawings- Fig. 1 is a front elevation of my switch, with the front of the case removed. ' Fig. 2 is a sectional elevation .of, the same. Fig. 3 is an elevation, partly in section, of the controlling magnet and tripping mechanism. Fig. 4: is a fragmentary elevation of the switch showing one of the switch contact tracks and roller operating thereover for guiding the movable switch contact into and from operating position. , Fig. 5 is a section of the same. Fig. 6 is an enlarged fragmentary section of one of said tracks and associated parts. Fig. 7 is a transverse section of the assembled switch. Figs. 8, 9 and 10 are sections of my improved alternating current magnet, showing respectively, the rotatable armature thereof in completely closed, partially closed and completely open positions relative to the outer yokes, or keeper of the magnet. Fig. 11' is a circuit diagram of the electrical connections of the switch and elements associated therewith. Fig. 12 is a perspective view of the switch mounted upon a suitable frame, or stand, for convenience and accessibility. Fig.- 13 is an enlarged side view of the yieldable limiting member associated with the magnet tripping device for regulating the movement of the magnet armature. aerate? Fig. ltis an enlarged view of the mag net, and tripping mechanism, showing the latter mechanism in section. Fig. 15 is a perspective view of one of the contact fingers and support therefor. Fig. 16 is a view of the automatic safety cut-out switch. T have employed similar characters throughout the several views of the drawings and in the specification hereinafter following for indicating the same and like parts, the, structure and operation of which I will now describe in detail and at length in order that those skilled in the art may readily comprehend the use and operation of my improvements. The following facts should be considered and understood-at the outset of the description of my device, to-wit: v V In the device of my invention T have provided means for overcoming all of the disadvantages of the usual forms of starters and other allied devices and at the same time have provided additional features and characteristics which have heretofore been unknown and afford a greater degree of protection, in a simple form and arrangement of parts, than said other device, and therefore aflord a more elastic unit of operation, entirely automatic and having all necessary safety appliances so as to insure against damage and injury to the switch mechanism or the operator. In the drawings hereinbefore referred to C represents a case and C a cover therefor which is adapted to fit snugly over the inturned edges 1 of the case and may be hingedly connected at the top edge by means pf an a-ngularly bent strip 2 which hooks under a correspondingly bent portion 3 of the case. At the bottom member C is held against the case G by means of a beep at and may be locked by means of an ordinary lock 5 engaging a staple 6 attached to the bottom of the case, the front end of the hasp being bent upwardly and out-. wardly in front of and in engagement with the front side of the cover as shown in Fig. 2. The case C may be mounted on the wall in some cases or upon a suitable frame, or standard F adapted to rest upon the floor in any suitable location, the case being held on said frame by means of bolts 5', 5', etc., extending through the rear wall 6 of the case and the legs of the frame. The upper portion of case C has a flat panel P of usual character and of insulating material, such as slate or the like, held on the side walls of the case by means of strap irons 7, 7. etc., riveted to the said side walls and attached to the panel P by means of bolts 8, 8, etc, said panel being substantially spaced from the rear walls of the case so as to affordample room at the rear ill) thereof for the necessary wires and connections leading to and from the several elements of the switch mechanism. The lower portion of the case C, below the panel I houses a suitable and preferable form of alternating current magnet M which includes spaced end members 9, attached to the rear wall (3' of the case by means of bolts 10, which extend through feet 11, integral with said end members, and a central laminated keeper portion K, all of said magnet parts being held together by means of stay bolts 12. A triple pole switch is mounted on the face of the panel I and near the upper edge thereof I have provided the usual cartridge fuses F, F, F, held in ordinary fuse clips, f, f, 7. Below and slightly spaced from. said fuses I have provided three pairs of contact plates, alined with the fuses, and the ends of the upper plates a, 0,0, thereof are substantially spaced from the ends of the lower plates c, c. The upper plates 0, 0, c are attached to the fuse clips f, f, f", - respectively by means of screws, or terminals 13, 13', 13", and the lower portions thereof are bent outwardly from the panel P and thence downwardly as shown, in the d irectiori of the ends of-the lower plates 0, 0', a Likewise the lower plates are attached to the anel P by means of screws, or termina s, 14, 14', 14", and are bent out wardly and upwardly in the direction of the upper plates. Thus the end,p0rtions 15, 15, 15 of the upper plates and those 16, 16, 16 of the lower plates are alined vertically and parallel with the panel 1 and said plates rest upon mountings D, D, D, of insulating material and comprise side plates 17, 17, 17, which are attached to metal b'rack ets 18, 18, 18 held on the face of the panel, floor portions 19, 19, 19 attached to said side plates and forming supports for the contact plates C and G and shorter side plates 20, 20. 2O suitably attached to the other members of the mountings and spaced from the space of the panel P. Blow-out coils B, B, B, are provided, respectively, between the plates 19, 19, 19 of mountings I), D, D, and the face of the panel P and are wound around cores held between the floor portions described and said panel by means of screws 21, 21, 21. Thewires 22, 22, 22, of said coils are attached at one of their ends to the motor line terminals m, m and m", respectively, at the upper end of the panel P and the other ends thereof are attachedto the contact plate terminals 14, 14, 14, respectively. The said terminals 14, 14', 14", are connected by means of wires 23, 23, 23, with the fuse cli terminals 7, f, f" at the upper ends of the use clips. respectively. Thus connections are established through and around the fuses F, F, F", of the switch by means of said parts and the arrangement described, for reasons which will hereinafter appear. l ()n thelower portion of the panel P and near the sides thereof I provide a pair of guide members G, provided with internally extended ribs 24, forming tracks for rollers 11, carried on the opposite ends of a square transverse shaft- S, said rollers having flanges 25, overlying the edges of said ribs. It will be noted that in the central portion of said guides I have provided pivoted switch members Gr, held on pivot screws 26, carried in. lower diagonal portions 31 paralleling the inner edge of members G when in the osition shownjn Fig. 4. Guide members are held on the face of the panel P by means of screws 32, or bolts extended through feet 32 thereof. 1 The shaft S, hereinbefore referred to, is of square crosssection and is completely insulated with mica or other suitable material and said shaft carries a triplet of contact plates, or fingers 0 c, 0", which are yieldablv held in brackets 12, b, b, respectively, and consisting of members 33 and 34 held together on opposite sides of said shaft by means of screws 35, 37 of the members 33 are bent inwardly in the direction of the panel P and have slots 38 therein through which said contact fingers extend. Also, the upper ends of said fingers are bent inwardly to afford flat con-, tact portions 40 for contact with the portions 15 of the stationary contact plates 0 and 16 of thelower plates 0'. tween the outer portions of the plates 33 and the fingers 0' serve to hold said fingers resiliently and yieldably at the bottoms of the slots 38 39 in the bracket members, so that they may yield outwardly when required. The lower ends 42 42 and 42" of fingers 0" are attached at 43, 43, to wires 44, 445 and 44", respectively, which are of ample length and flexible enou h to permit the movement of the shaft S an connections, and said wires connect at their other ends with the line terminals L, L and L, leading to a source of The extremities 36 and Springs 41 held be 46 and 47 etween which are adjustablv held, near each side of the switch, vertically disposed bars 48. These bars have square openings toreceive the shaft S so as to prevent ltl the bars turning thereon, and have elongated slots 49, in their lower portions through which the extended'ends of the armature shaft 50 of the magnet M extend. Thus the bars 48 are slidable on the shaft 50, and rollers 51, carried on said bars above the slots 49 are alined with and adapted to engage the edges of arms 52, 52 fixed to the shaft 50 adjacentto the bars 48. This structure is clearly shown in Figs 1 and 2. Magnet M has a pivoted armature A, as shown in Figs. 8, 9 and 10, around which is a suitable winding '10. The peripheral portions a, a, of said armature are spirally formed relative to the axis of the armature shaft 50, and the portions 53, of the keeper K of the magnet are also similarly and correspondingly formed so that the curves of the portions a and 53, during the movement of the armature, may at all times be so related that all points on the portions a of the armature will be equidistant from opposite points on'the portions 53 of the keeper. In this connection, it will be noted that air gaps 54:, are provided between opposite portions of the keeper K of the magnet and two of the stay bolts 12 of the magnet are of brass or other nonmagnetic material so as to provide against what is known as a magnetic circuit. The rotation of the armature shaft 50 j is clockwise and the different positions thereof are shown in Figs. 8, 9 and 10, Thus, as the armature is rotated, the arms 52 which are fixed to said shaft midway of their ends, are also rotated in a clockwise direction as viewed in Fig. 2, and the cam portions 55,0fsaid arms engage the rollers 51, on bars 48, and lift said bars together with the transverse shaft S and the contact plates 0 thereon. .With the parts in the positions shown in Fig. 2, the bars 48 are raised so as to make the movable contacts 0" register and make contact with the lower contact plates 0. This initial action' is accomplished through the medium of the starting button S which effects the energization of the magnet M, as in other switches, and the fuses F, F and F" are omitted from the power circuit, the circuit being completed around the fuses by means of the wires 22, through terminals 14, 14 and 14C and the coils B and motor line terminals m, m and m". The starting current is allowed to flow without interrup-. tion for a necessary length of time by means of the following described mecha-- nism. On one end of theshaft 50 of the armature ll provide a limiting device consisting of a pair of flat side members 56 and 57, which are connected at the opposite ends by transverse members 58 and 59, and a central split clamp member having a pair of arms 60 and 61 held on the shaft at) by means of'a heavy-screw 62. On the mal position of the. limiting integer extends carry plungers 60 and 61 on their inner adjacent portions which engage the plates 65 and bear against opposite portions of a transverse pin 69 held in the side plates 56 and 57, the said plates being o rigidly connected together in the. manner described and not fixed to the shaft 50 have a difierential movement relative to the clamp arms 60 and 61. The extent of this differential movement corresponds to the difference in diameter between the pin 69 of the deyice and the width of the gap between arms 60 and 61 adjacent to said Now, when the bars 48 have been actuated to the extent described for providing starting current without interruption to the motor, the transverse member 58 will engage the end 70 of a dog 71 pivoted on one of the sta bolts 12 of the magnet M, as shown in ig. 3 at the intermediate position indicated in broken lines. The normechanism just described is indicated in 11 lines and the normal position of the member 71 is indicated in broken lines in Fig. 3. Now when the mechanism is at rest member 58 will rest against an adjusting pin, or screw 72 held in a. lug 73 on the magnet frame and the member 59 is adapted to rest against and be limited in the'extent of its action by engagement with a similar screw 74E held in a similar lug 75 on the magnet frame. The dog 71 is actuated by a solenoid. Y having a coil 7 5' supported on a bracket 7 6' attached to the magnet frame. Said solenoid has an adjustable armature 77 carried on a vertically slidable stem 78 and slidably held at the top in a boss 79 formed on the magnet frame. The downward movement of the armature stem 78 is limited by means of nuts 80 on the upper end of the stem and above the boss 79 and other nuts 81, carried below the upper end of and within the counterbore 82 of said boss limit the movement of thestem upwardly. The outer end of the dog 71 has a yoke 83 thereon which straddles the stem 7 8 and is connected therewith for operation, the end thereof resting on the uppermost of the nuts 85 for movement With the stem. vNormally the armature and stem of the solenoid are held downwardly by gravity so that the yoke 83 of dog 71 is engaged by the lower nut 85, so that the dog 71 may be ralsed thereby into the position shown in broken lines in Fig. 3. The solenoid is adapted to be energized. by means of the connections hereinafter described and in the manner stated, momentarily with the depressing ofv the starting button. S and the completion of the starting circuit. The armature of the solenoid is therefore elevated so that the nuts 85 raise the yoke 83 of dog 71 and thus prevent the further turning of shaft of the magnet M, by reason of the engagement of the member 58 with the end of the dog 71, as shown in Fig. 3. With the drop in current and the normal amount of current in the power circuit, the solenoid is insufficient for supporting its stem and the member 58 is permitted to pass the dog 71, thus permitting the fur? ther rotation of shaft 50 of the armature. The further movement of the shaft S and its contacts 0', which corresponds to and is effected by the further rotation of shaft 50, further elevates the rollers R of shaft S into the extreme position 29 0f the guides G as shown in Fig. 4 and the end portions 86 of the arms 52 engage and rest immediately "beneath the rollers 51, as shown in broken lines atthe right of Fig. 14. In this instance it is intended that the rollers 51 will be on the vertical centerline of the armature shaft 50 and the members 56-57 and --61 are held by the pull of the magnet M in strained relation against the tension of the spring 66. This feature insures the restoration of the parts, from a dead center, to normal position and the fall by gravity, without obstruction. the moment the magnet M is deenergized for any reason whatsoever. It will be noted in Fig. 12 that the starting and stopping buttons S and S are held in a suitable and well-known type of case 88 which may be attached in the manner shown, or otherwise, by means of a flexible tube 89, with the case C. This connection may be as shown in Fig. 2, by the employment of a nipple 90 and a lock nut 91 on the inner end thereof and adapted to engage the inner side of the upper wall of the case. An automatic cut-out device is provided at one side of the switch on the panel P and includes a pair of clips 92 and 93 having terminals 94 and 95, respectively, for holding the said clips on the face of the panel P, and a bridge contact plate 96 pivotally held (6n the upper clip 92 so that when the front carried between the outer lip 98 of clip 92 and the upper end of contact plate 96 will cause the opposite end of said plate 96 to disengage the lower clip 93. This automatic cut-out device is. in series with the control magnet Mso that itwill be readily apparent that when the case cover is detached and removed, fiat springs 99 attached is removed from the case C a spring 97 to the bridge plate 92 being held in engagement with a roller 1* carried on a stud r on said cover when in normal position on case wires M andM connect respectively with line terminals m, and m, while the terminal on connects with one end of the solenoid coil by means, of wire M The opposite end of coil 75 connects with an auxiliary terminal M on the panel P b means of wire M and the third line wire Ll connects also therewith. Thus the solenoid Y is seen to be in series with one side of the motor circuit and it will be energized the moment the motor circuit is completed. The point 100 of the starting button S is connected by wire 101 with line terminal L of the switch, and point 102 of said button is connected by'wire 103 with terminal 14,the starting circuit being completed by the depressin of button S Point 104 of stop button 102 of start button S by wire 105, and point 106 is connected by wire 107 with. terminal 94 of the automatic cut-out device operated by the removal of the cover C. The depressing of stop button S breaks the circuit and opens the switch. The source of current supply may be connected by means of wires L, L and L with switch terminalsL, L and L" so that when the power circuit is closed either through or around the fuses F, F, F", current will be supplied to the motor. It will be understood in this connection that when the contacts 0' and c" are engaged the current flows through contacts 0', terminals 14, 14' and 2 is connected withpoint 14" blow-out coils B, B, B, and to the motor terminals m, m, and m". When contact is completed between the contacts a and 0" the current flows through contacts 0 fuses F, F, F wires 23, blow-out coils B, and wires 22, to the motor terminals,-thus cutting in the fuses in the circuit. The automatic cut-out switch between terminals 94 and 95 is in series in one-side of the magnet circuit to the start andstop buttons S and S terminal 95'being connected 9 with the winding w of the magnet M by means of a wire- 111, the other end of the winding being connected with line termi-' nal L of the switch by means of a wire 112. Thus when the cover is removed the connection between the terminals is broken and the magnet circuit is opened 50 that the switch will be inoperative. The blow-out coils B serve'the usual purpose of extinguishing or preventing the arcing of the current between the ends of contacts c and c as the latter are moved upwardly in the direction of the former, and also between contacts and 0 when the final circuits are established. The lines of force in the Vicinity of the coils B act to prevent, or to extinguish any arcs which may be created between these elements. This phenomena is well known in the art and not of my discovery. contacts ,0" instead of being moved vertically into contact with the plates 0, or 0', are moved both upwardly and inwardly and a quicker contact between the contacts may be effected by reason of this feature. llt will be observed that the contact of the 7 members a" with the plates 0' begins with the meeting of the bent edges of the respective members and any arcing that may occur is confined to these points only inasmuch as subsequent motion of the contacts 0 results in a sliding engagement of the said members. This action gives a wiping contact assuring even wear thereof and practically precludingpitting of the respective members. The contact is made rapidly and I as a further precaution against wear with till a view to increasing the life of the contacts the action takes place in a strong magnetic field which will blow out any are that may occur. The latter feature is a decided advantage in the case of higher voltages. The necessity of maintaining oil about the contacts is eliminated in my improved device. Likewise, on the return stroke, when no voltage occurs on the power line, or when the stop button is depressed for opening the switch, the contacts 0" first move directly away fromand out of contact with the contacts 0 instead of first slidingthereover for a slight distance, the rollers then moving over the traclr portions along the outer side of the guides G and finally settling by gravity into the portions 28 of the guides G, as shown in Fig. 2. 0f course, when the switch from the connections c'-c is made to the connections c--c, the movement of the contacts 0" is vertical and parallel to the face of the panel P. On the restoration of the parts to normal position (this being accomplished, as stated, by gravity) the arms 52 are also dropped into the position indicated by broken lines in Fig. 2 by means may be safely replaced by a novice. During the entire period of operation of the motor the contacts are maintained by the magnet M, which as explained exerts a constant pull in any. position within its normal range of'movement, and serves not only for the purpose of moving the contacts into initial starting position but further serves to maintain contact during the period of operation of the motor'until the no voltage condition occurs. While T have shown and described an alternating current magnet of my own design and invention in connection with my improved switch mechanism, it will be under stood that l do not limit myself to the use of this or any other particular type of magnet, nor do I rely upon the specific character of any of the parts or the particular ar-- rangements' and relationships herein de scribed for. the accomplishment of the object of my invention. ll conceive it to be possible within the scope of the appended claims, to substantially alter and modify the structure shown without. departing from the spirit of my invention. What ll claim, is: 1. A starting switch for electric motors composed of a multiple contact device and including a plurality of sets of spaced stationary contacts, a'plurality of movable contacts for engagement therewith, a. common .support for said movable contacts, fixed guide members for. said support, a power actuated oscillatable shaft, cams fixed to said shaft, means operably connecting said cams with said movable contact support for advancing and retracting the movable contacts into successive engagement with lllll corresponding members of said stationary contacts, said guide means being arranged to move said movable contacts slidably from one to another of the spaced stationary contacts in a starting operation, and having 'means for laterally retracting the movable contacts from engagement with the final stationary contacts when the circuit is open. 2. A starting. switch for electric motors composed of a multiple contact device and including a plurality of'sets of spaced stationary contacts, a plurality of movable contacts for engagement therewith, a common support for said movable contacts, fixed guide members for said support, a power actuated oscillatable shaft, cams fixed to said shaft, means operabl connecting said cams with said movab e contact support for advancing and retracting the movable contacts into successive engagement withccorresponding members of said sta tionary contacts, and means cooperating with said cams for momentarily stopping the sliding movement of said movable con-- tacts for engagement with the initial stationary contacts, for the purpose described. 3. A starting switch for electric motors composed of a multiple contact device and including a plurality of sets of spaced stationar contacts, a pluralityof movable contacts or engagement therewith, a common support for said movable contacts, fixed guide members of said support, a power actuated oscillatable shaft, cams fixed to said shaft, means operably connecting said cams with said movable contact support for advancing and retracting the movable contacts into successive engagement with cor responding members of said stationary contacts, said guide means being arranged to move said movable contacts slidably from one to another of the spaced stationary contacts in a starting operation, and means cooperating with said cams for momentarily stopping the sliding movement of said movable contacts for engagement with the initial stationary contacts, for the purpose described. 4. Astarting switch for electric motors composed of a multiple contact device and including a plurality of sets of spaced stationar contacts, a plurality of movable contacts or engagement therewith, a common sup ort for said movable contacts, fixed gui e members for said support, a power actuated oscillatable shaft, cams fixed to said shaft, means operably connecting said cams with said mo able contact sup ort for advancing and retracting the mova le contacts into successive engagement with corresponding members of said stationary contacts, said guide means being arranged to move said movable contacts slidably from one to another of the spaced stationary contacts in a starting operation, and having means for laterally retracting the movable contacts from engagement with the final stationary contacts when the circuit is open, and means cooperating with said cams for momentarily stopping the sliding movement of said movable contacts for engagement with the initial stationary contacts, for the purpose described. 5. A starting switch for electric motors composed of a multiple contact device and including a plurality of setsof spaced stationary contacts, a p urality of mova'ble con tacts or engagement therewith, a common support for said movable contacts, fixed guide members for said support, a power actuated oscillatable shaft, cams fixed to said shaft, means'operably connecting said 6. A starting switch for electric motors composed of a multiple contact device andincluding a pluralit of sets of spaced stationa contacts, a p urality of movable contacts for engagement therewith, a common support for said movable contacts, fixed guide members on said support, a power actuated oscillatable shaft, cams fixed to said shaft, means operably connecting said cams with said movable contact support for advancing and retracting the movable con tacts into successive engagement with corresponding members of said stationary contacts, said guide means being arranged to move said movable contacts slidably from one to another of the spaced stationary contacts in a starting operation, means cooperating with said cams for momentarily stopping the sliding movement of said movable contacts for engagement with the initial stationary contacts, and means for thereafter releasing said movable contacts for further operation and for engagement with the final stationary contacts. 7. A starting switch for electric motors composed of a multiple contact device and including a pluralit 'of sets of spaced stationary contacts, a plurality of movable contacts for engagement therewith, a common support for said movable contacts, fixed guide members for said support, a power actuated oscillatable shaft, cams fixed to said shaft, means operably connecting said cams with said movable contact support for advancing and retracting the movable contacts into successive engagement with correspondin members of said stationary contacts, sai guide means being arranged to move said movable contacts slidably from one to another of the spaced stationary contacts in a starting operation, and having means for laterally retracting the movable contacts from engagement with the final stationary contacts when the circuit is open, means cooperating with said cams for momentarily stopping the sliding movement of said movable contacts for engagement with the initial stationary contacts, and means for thereafter releasing said movable contacts for further operation and for. enga ement with the final stationary contacts, for the purpose described. 8. A starting switch for electric motors ina given direction for guiding the movable contacts into contact and arranged to thereafter guide said movable members into sliding contact with the final contact members, said trip device being reversely operable when the movable members are disengaged from the final contact member for guiding the movable members outwardly from the final contact member. 9. A starting switch for electric motors including a plurality of initial stationary contacts, a plurality of final stationary contacts alined therewith and spaced therefrom, a plurality of movable contact members operably disposed in the plane of said stationary contacts and normally disengaged therefrom, a common support for said movable contacts, said movable contacts being arranged for successive engagement with said initial and said final stationary contacts, guide means for said support including a trip device adapted to be actuated in a given direction for guiding the movable contacts into contact and arranged to thereafter guide said movable members into sliding contact with the final contact members, said trip device being reversely operable when the movable members are disengaged from the final contact member for guiding the movable members outwardly from the final contact member, and power operated means for momentarily holding said movable members in engagement with the initial contact members, and adapted to be thereafter automatically released for permitting the engagement of the movable members with the final contact members. bers operably disposed in the plane of said stationary contacts and normally disengaged therefrom, a common support for said movable contacts, said movable contacts bemgarranged for successive engagement with said initial and said final stationary contacts, guide means for said support in- 'cluding a trip device adapted to be actuated in a given direction for guiding the movable contacts into contact and arranged to there after guide said movable members into slidinverter ing contact with the final contact members, said trip device being reverselyloperable when the movable members are disengaged from the final contact member for guiding the movable'members outwardly from the final contact member, and power operated means for actuating said movable members simultaneously. i 11. A starting switch for electric motors comprising a plurality or" sets of initial and final contact bars, a plurality of movable contact bars for successive engagement respectively with the initial and final contact bars, a power actuated cam arranged for operating said movable bars, means connecting said movable bars with said cams, and guide means for effecting a longitudinal and lateral movement of said movable bars into and from contact with the stationary bars, said cam being arranged for electromagnetic operation. c l2. A starting switch for electric motors comprising a plurality of sets of initial and final contact bars, a plurality of movable contact bars for succes-siveengagement respectively, with the initial and final contact bars, a power actuated cam arranged for operating said movable bar, means connecting said movable bars with said cams, guide means for efiecting a longitudinal and lateral movement of said movable bars into and from contactwith the stationary bars, said cam being arranged for electro-magnetic operation, vand means cooperating with said cam for momentarily stopping the movement of said movable bars when engaged with the initial contact bars. 13. A starting switch for electric motors comprising a plurality of sets of initial and final contact bars, a plurality of movable contact bars for successive engagement, respectively, with the initial and final contact bars, a power actuated cam arranged for operating said movable bars, means connecting said movable bars with said cams, guide means tor efiecting a longitudinal and lateral movement of said movable bars into and from contact with the stationary bars, netic operation, and means cooperating with said cam for momentarily stopping the movement of said movable bars when engaged with the initial contact bars, said stopping means being arranged for electromagnetic operation. 14. A starting switch for electric motors comprising a plurality of sets of initial and final contact bars, a plurality of movable contact bars for successive engagement, respectively, with the initial and final contact bars, a power actuated cam arranged for operating said movable bars, means connecting said movable bars with said cams, ide means toruefiiecting a longitudinal an lateral movement of said movable bars into ltd -m0vabie bars for further operation after a. PIQdQtQIHllIiGd interval of time, far engagemen'' with @he final Contact. EDMUND E. TAEUBERT, Witnesses CHAPmg C. MONTGOMERY, LEO JLLIARVEY.

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    US-3103564-ASeptember 10, 1963Solenoid switch operating mechanism
    US-3211955-AOctober 12, 1965Westinghouse Electric CorpCircuit interrupting device