Патент USA US2134633код для вставки
Oct. 25, 1938. ' A. c. GAYNOR ELECTRIC ' 2,134,633 SWITCH Filed» June 12, .1936 . . u30¢.3,.”3./34.\ 3 .3Vu ...\\ A3. MrA‘m .H.” 28 MW134“ 03 um .nJ?3 E3 3 a 333 .r» . ‘Patented Oct. ‘25, v 1938 2,134,633 UNITED‘ STATES‘ PATENT UFF'ICE - ‘ 2,134,633 4 . ' " , ELECTRIC swr'ron Arthur C. Gaynor, Stratford, Conn. Application Jamie, 1936, Serial No. 84,780 16 Claims.- (crate-67) This invention relates to electric snap switches, and more particularly aims to provide improve ments in the construction of snap switches of the toggle type. , . ' > ‘ 5 It is a general object of this invention to pro vide an improved electric toggle switch, the con struction of which is outstandingly simple, so that manufacturing costs are low, while yet maintaining an e?iciency of operation of the . m switch which is extremely high. In the accomplishment of this object the pres ent invention contemplates, in such a switch, an improved toggle construction, improved contact elements, and also an improved switch mecha M nism supporting structure. . - In a certain‘ type of toggle switch adapted for plate mountingv the means for‘ mounting the switch on the plate includes an externally thread ed sleeve or barrel which carries clincher nuts to 20 grip the plate, the toggle actuating leverof the switch being carried by the barrel so as to pro trude from the supporting plate for easy access and manipulation. In these switches it has been the custom, prior to this invention, to carry piv 255 otally the manually actuated switch lever on a I pin which passes through oppositely disposed apertures in the barrel, said pin being supported or anchored in the barrel. ' This has necessitated the provision of a barrel having substantially a some; well, has required additional machining operations on‘the barrel, and further has been undesirable in that there existed the possibility of. injury to the threads of the barrel. These disadvantages have been overcome by at the present‘ invention, which. provides an im proved supporting structure for the manually actuated lever of the switch,‘ which structure does away with the necessity for a thick walled barrel, since the pivot pin for the actuatable lever is not Ml supported in the barrel. _ According to the‘present improved structure the switch is provided with a cover plate which . has outwardly extending apertured lugs or ears for supporting the pivotal pin, said plate having 45 attached thereto a relatively thin walled mount ing barrel which houses over the outwardly ex tending lugs 01’ the plate, and serves now to posi tion the pin against endwisev movement, and which barrel also acts as a guide for the switch b0 lever. By this construction there is avoided the extra machining operation .which would other wise be required in anchoring the pivot pin in the mounting barrel, as well as avoided the‘ possi bility of marring o! the threads of the vbarrel, 66 which was 7 present with the prior less desirable supporting means._ Thebarrel thus now func— tions to mount the switch, to limit endwise move ment of the pin, and to cover the supporting lugs or the plate. ' a The present invention additionally provides 5 a simple and effective means for attaching the mounting barrel to the cover plate of the switch such that the two, are ?rmly held together, and such that there is positively prevented any possi— bility of relative turning between these parts. 10 In accordance with the expressed general object there is also provided asimpli?ed toggle mechanism for actuating the contact bridging . members of the switch in response to movement of the switch handle or lever, and additionally 15 provided improved electrical contact means'co- ‘ acting with the toggle-actuated bridging mem bers of the switch. By the provision of the improved electrical contact means in the switch, it has been possible 20 to simplify and make more compact the housing or casing of the switch, resulting in a desirable smallness of size and further economy of manu facture, yet without sacri?cing satisfactory ' operation and high emciency ofv the article. ‘25 Other features and advantages will herein after appear. . ' - In the accompanying drawing: Figure 1 is a side elevation of an embodiment of the improved switch of this invention. 30 Fig. 2 is a top view of the switch of Fig. l, with part of the insulating shield,’ mounting barrel, and plate cutaway to reveal the improved con tact bar with its lug. ' Fig. 3 is a broken longitudinal vertical section 35 taken on the line 3-3 of Fig. 2.‘ Fig. 4 is a transverse vertical section through the switch. ' Fig. 5 is a top view of the insulating casing of _ the switch, with one of the improved contact _40 bars in place. Fig. 6 is a perspective view of one of the im proved contact bars of this invention. Fig. 7 is a top plan view of the cover plate of the switch. _ 45 Fig. 8 is a side view of the plate of Fig. '7. Fig. 9 is an elevation of the mounting shell or barrel of the switch before being attached to the cover plate. ' Fig. 10 is atop view of the barrel oi 50 Fig. 11 is a plan view of the tcggl ate. Fig. 12 is a side elevati a modi?ed form of toggle mechanis ‘7 Fig. 13 is an end elevation of the modi?ed toggle mechanism of Fig. 11. g V 55 2 2,134,688 The present improved toggle switch, as shown the underside of the raised central portion of said , in Figs. 1, 2, 3, and 4, includes ‘an insulating‘ plate, as at 39, Fig. 4. The barrel 23 is formed to guide the switch ‘ housing or casing 20, an insulating shield 2|, a carrying a spherical hand-knob or ball 25. As lever 24 so that it may be fabricated from a light stock, and said barrel is provided at its front with an apertured end closure 40 and a diamet usual, the mounting barrel 23 is provided with clamping nuts 23a to engage the margins of an aperture in a supporting plate or structure v10 through which the barrel extends. The casing 20, see Figs. 3, 4, and 5, is preferably molded from not have a large bearing surface on the pin 34. cover plate 22 and a mounting barrel or shell 23 through which extends an actuating lever 24 suitable insulating material such as Bakelite, and has a box-like shape having a bottom 26, side walls 21, and end walls 28, the top of the casing 15 being open. The cover plate'22, Figs. 7 and 8, closes over the top of the casing 20, there being interposed between the plate 22 and the casing the rectangular insulating shield 2 i. According to the present invention, the cover 20 plate 22 is adapted to act as a mounting for the actuating lever 24 of the switch. The plate 22, see Figs. '7 and 8, is stamped from a circular disk of metal, having ?at or straight edges 29, a cen tral circular raised portion 36, partially circular apertures 3| in said raised portion, and lugs or ears 32 having apertures 33, said lugs being later bent outwardly to extend, as shown by the broken lines in Fig. 8, so as to form trunnions for theisupport of the switch lever. The lugs 32 80 carry a pin 34, Fig. 4, which passes through the rically disposed slot 4| therein through which ex tends the lever 24. The slot 3| in the barrel guides the lever 24, preventing sidewise move ment or wobble, and therefore said lever need 10 The slot 4| of the barrel is positioned at right angles to the cuts 31 thereof, so that said slot will be properly, placed relatively to the lever 24 to allow for actuating movement of said lever about the pin 34. An important feature of the invention is that the barrel 23 now serves to prevent endwise movement of the pin 34 in the lugs 32, and there fore proper positioning of said pin is assured at all times without further anchorage. It will be noted that since the pin 34 does not now pass through the barrel 23 there is obviated the addi tional machining operations on the barrel which operations were heretofore necessary. The switch actuating lever 24, see Figs. 3 and 4, is stamped out of ?at metallic stock, having a central aperture to receive the pin 34, and hav ing an arm or toggle bar pointed at 43, and said lever has attached to its outermost part a spher 30 ical metallic knob 25. The toggle and contact mechanism of the It will be noted that the lever 24 is thus not‘ switch includes two link arms 44, see Figs. 3 and mounted in the barrel 23, but is mounted for 4, apertured at 45 so as to' be pivotally carried 35 pivotal movement on the cover plate 22 about - by the pin 34, and having their lower extremities 35 ‘the pin 34, and said mounting does not require apertured at 46 to carry a metallic spindle 41 apertures 33 in said lugs, and which pin pivotally supports the lever 24 of the switch. therefore that the barrel 23 have a heavy wall as with prior switches, since the barrel now functions to prevent endwise movement of the pin. This mounting is an important feature of the invention, since alignment of the switch lever 24 is therefore not dependent on alignment of the barrel with the casing 22. Also, since as will be hereinafter disclosed, the whole toggle 45 mechanism of the switch is dependent on proper alignment of the switch lever, there is provided by this improved type of support a much more rigid and workable structure than was heretofore on which are disposed contact shoes 48 and in sulating washers 49. The contact shoes 46 are preferably in the form of metal rings which are pressed on the ends of the spindle 41 so ‘as to 40 be tightly secured thereto. By this construction the spindle 41 and shoes 48 carried thereby may swing freely within the recess of the casing 22, being pivoted on the pin 34 carried by the cover 22. When the spindle and shoes are in the posi 45 tion shown in Fig. 3 the switch is in open-circuit position, and when the spindle and shoes are urged toward the other or left-hand end of the casing the 'switch is in closed-circuit position. By the present invention there is provided an possible, as well as a structure which may be 50 manufactured more economically. For the purpose of fastening the plate 22 to the ‘ improved stationary contact assembly which is casing 20, said plate is provided with oppositely disposed apertures 35 in its rim which align with apertures 35a in the casing, both sets of aper tures accommodating pins or rivets 36, see Fig. 3, which are headed over on the plate. Each of the apertures 35a. in the casing is countersunk at its bottom to receive the head of a pin 36, as shown. Therefore it will be seen that the switch lever 24 is securely mounted relatively to the casing 20, and therefore there is provided as well a ?rm mounting for the toggle mechanism of the switch. The barrel 23, Fig. 9, is provided with oppo sitely disposed cuts or slots 31 at its rear or bot tom, and also with a smooth skirt 3B, and said barrel is so proportioned that the skirt 38 may be inserted, with a close ?t, within the circular edges of the apertures 3| of the cover plate, so that the lugs 32 of said plate extend into the barrel 70 through the slots or cuts 31 thereof. The lugs 32 serve to'position the barrel 23 on the cover 22 against turning relatively thereto, and said bar rel is ?rmly attached to the'rcover plate by ?ar ing over the skirt portion 38 of the, barrelagainst engaged by the shoes 48, and which includes im proved contact members 50 carried by the cas ing 22. One such contact member is shown in Fig. 6, the other contact being similar but the 55 exact reverse of that shown. The contact 50 in cludes a bar 5| extending at its lower extremity in an edgewise direction to form a foot 52, said bar having intermediate its ends a lug 53 integral therewith and extending at right angles thereto 60 and said lug being apertured at 54 to receive a wire-binding screw 55. The stationary contacts 50 are carried by the casing 22 in specially shaped vertical slots 56, see Fig. 5, disposed in two corners of the casing. One edge of each slot 56 has a longitudinal groove 56a disposed therein while the other edge is rounded off at 56b to form substantially a lon gitudinal rib. When a contact member 50 is in- ' serted in a slot 56 the sharp outer corner of said 70 member occupies the groove 56a, and the rib 56b of the slot engages the inner corner between the bar 51 and lug 53 of the member. The foot 52 of the bar ?ts into a groove 51 in the bottom of the casing, and this arrangement thereby pro 75 3 2,134,033 r vides for an exceptionally ?rm and immovable desirable low resistance circuit of the switch positioning of the contact in said casing. When . since the final circuit-closing position of the shoes the switch is assembled, the stationary contacts 50 are ?rmly held in the casing slots and against removal therefrom by the insulating shield M, > which also prevents said contacts from touching 7 the metallic cover plate 22 and being short-cir"- 48 is past the circuit-breaking loints, and is sub stantially-against the body porlon of the bar 5i. Also, the movement of the shoes M past the cir cuit-breaking points of the stationary contacts will tend to remove any dirt which might be de posited at these points as a result of arcing. Referring to Fig. v3, when the spindle W and‘ The arms M and 58 are preferably made of in 10 shoes M are urged in leftward direction from the‘ sulating material so that the contact shoes 48 10 open-circuit. position shown, each of these shoes are electrically insulated from the metal actuat t8 engages the inner curved portion of a bar 5i ing lever 24! and knob 25 of the switch, thereby thereby electrically connecting the two bars to preventing any‘ possibility of inadvertent electri gether and closing the circuit of the switch. cal shock to a person throwing the switch. Preferably either the upper or lower apertures A modi?ed form of toggle mechanism is shown 15 of the link arms M are made slightly oversize in Figs. 12 and 13. A switch actuating lever Ma 'so that the shoes M can ride up on the feet 52 is pivotally mounted on a pin 34a passing through > an aperture 42a of-thelever, said lever carrying when theswitch' is closed. ' It can be readily seen that the stationary at its outer or upper extremity a spherical knob contacts 50 can be manufactured in large quan ' 25a, and the lower extremity of the lever having titles and with» extreme, economy, said contacts apoint or knee 133a. The pin 34a carries link arms 20v . 6E, through the lower ends of which pass a metal each being stamped in one piece from sheet met al. The assembly including the slots 56 in the - spindle 65 having contact shoes 66 vthereon. Be casing'and the contacts 501s‘ extremely simple tween the shoes 6b the spindle 65 is engaged by, and permits said casing to be made compact-and a U-shaped spring-carrying member 61, the neck' so as to have small dimensions, thereby resulting of which is recessed to partially receive said shaft, said member carrying a helical compression in further economy in manufacture. For the purpose of urging the contact shoes spring 68. It will be noted thatthe member N is formed M toward either open or closed-circuit position 30 there is provided a toggle and spring mechanism of one piece, and therefore the arms of said 30 which includes, a pair of spring-carrying arms 58, member do not require additional means to hold I preferably formed of insulating material, and them in position relatively to each other. Ac pivotally carried on the spindle 47. The arms cordingly, in this embodiment, there is provided a plate 69 which ?ts between the arms of the mem 58 have reduced shank portions on which is dis cuited thereby. ' posed a helical compression spring 59 engaging~ at one and shoulders 600i said arms and at the other end a slidable plate 6i carried on the arms. The plate 61, see Fig. 11, is rectangular in shape, having two parallel slots therein extending in a 40 longitudinal direction thereof, said slots accom modating the reduced portions 'of the spring arms 58, and said plate has a central portion 62 intermediate the slots which has a depression at ,1. Li 63 for engagement with the pointed bar it of the switch-actuating lever. Referring to Fig. 3, when the switch lever 2t ‘ is moved'to the left the spring 59 will be‘ com pressed due to movement of the sliding plate 6! ber 61, said plate engaging at its upper surface the point 430. of the actuating lever 24a, and en gaging at its lower surface theend of the spring 68. The plate 69 has the shape of a'?attened letter M, see Fig. 12, so that the spring 68 and point 43a are normally centrally positioned there by. Itis therefore seen that the plate 69 need not be provided with slots, and thus there has been eliminated a machining operation on the plate which was heretofore necessary. . The upper extremities of the arms of the mem ber El preferably are provided with ears ‘Hi to limit movement of the spring 68 when the toggle joint is broken in either direction. The shoes 66 are ?rmly attached to the spindle on the arms 58, said plate being depressed by the 65 thereby effectively positioning the spring 50 point’ t3 of the lever 2%, until a position is reached slightly past dead center. . At this point, carrying member Bl- thereon, and the arms of said 50' the compression of the spring will cause the arms member are prevented from spreading by the M, spindle M and shoes at to snap quickly to the spring 68, which is positioned at its upper end 1 left to circuit-closing position. Movement of by the plate 69. Variations and modi?cations may be made vi CH the switch lever M to the right to open the cir cuit of the switch results in a snap action similar within the scope of this invention and portions of the improvements may be used without others. to that‘ just described. > ’ ~ ‘ I claim: ' The arrangement of the contact bridging mem1. In an electric switch, a box-like insulating bers of the switch, including the improved sta .60 tionary contacts 50 which are held in the slots casing having a bottom, side walls and end walls, and having a vertical slot in a corner formed by 56‘ of the casing, has proved to be extremely sat isfatcory and e?lcient. The stationary contacts a side wall and an end wall, said slot separating are securely held against movement at all times, said walls and having ‘in one of its edges a longi and throwing of the switch lever 24 results in a tudinal groove and on the other of its edges a bridging wedge-action between the shoes 48 and longitudinal rib disposed opposite the groove; 65 . 'the vfeet 52 of the bars 5i, thereby serving to and a. contact member ?tting into said slot and having a pair of biplanar portions engaging the positively e?ect a low resistanceelectrical con nection between said bars, and a connection ' which is capable ofhandling relatively high cur rents.' In addition, when the switch is thrown to open-circuit position the actual breaking of- the ' edges of the slot and respectively, inter?tting with the groove and rib of said edges so that said member is held thereby in the slot against all but longitudinal movement. circuit will occur near the tip or toe part of the . v 7 ' - . 2. In an electric switch, a box-like insulating shoes 52, and should any arcing occur at these casing having a bottom, side walls and end walls, points‘ which might ultimately cause dirt to be and having a pair of vertical slots, one at each 75, deposited thereat, such dirt would not impair the of the corners formed by the two, side walls and 4 " . 21,134,633 one of the end-walls, each 01’ said slots separating the end wall from one oi-the side walls, and ' having in one of its edges a longitudinal groove and in the other of its edges a longitudinal rib ' disposed opposite the groove; and a pair of con tact members ?tting one into each of said slots, each of said members having a pair of biplanar portions engaging the edges of its supporting slot and respectively interfltting with thegroove and rib of said edges so that said members are held thereby in the slots against all but longitudinal movement._ 3. In an electric switch, a box-like insulating casing having a bottom, side walls and end walls, ll and having a vertical slot in a corner formed by a side wall and an end wall, said slot separating said walls and having in one of its edges a longi tudinal groove; and a contact member ?tting into said slot and having a pair of biplanar pore tions respectively engaging the edges of the slot, one of said portions inter?tting with the groove in the one of said edges so that said member is held thereby in the slot against all but longi tudinal movement. ' 4. The invention as de?ned in claim 3, in which a planar portion of the contact member extends outward beyond the walls of the casing to form a connection lug, and in which said lug carries means for connecting a wire thereto. 5. The invention as de?ned in claim 3, in which the bottom of the casing has a groove therein extending in the plane of the inner planar por tion of the contact member, and in which said inner portion of the contact member extends downwardly into said groovein the. casing to further securely position the member against movement in the casing. 6. The‘ invention as de?ned in claim 3, in which the bottom of the casing has a groove therein extending in the plane of the inner planar portion or the contact member'and in which said inner planar portion of the contact member at its bottom‘extremity extends edgewisely thereof in the groove of the casing to further securely 46 position the member against movement in the casing, . 7. The invention as de?ned in claim 3, in which the bottom of the casing has a groove .therein extending in the plane or the inner planar portion of the contact member and in which said inner planar portion of the contact member at its bottom extremity extends edgewisely thereof bridging member with a snap action to a posi tion of rest either against the contact members or away from the contact members. _ 9. In an electric switch, a toggle mechanism, including a pin; an actuating lever pivotally car- 5 ried by the pin, said lever having a pointed arm adapted to serve as a toggle bar; a pair of link members pivotally carried by the pin; a spindle carried by the free extremities of the link mem bers; a U-shaped‘toggle bar, the base of which 10 ~engages the said spindle, the arms of the U-bar being disposed one on each side of the pointed arm of the actuating lever; a spring carried by the arms of the U-bar; and a solid plate disposed between the arms vof the U-bar and engaging both 16 the pointed arm of the actuating lever and the end of the said spring to transmit force from the spring to the lever arm. , _ 10. The invention as de?ned in claim~ 9, in which the plate is shaped so that its one side positions the spring centrally thereof, and the other side positions the pointed arm centrally thereof. 11.,The invention as de?ned in claim 9, in which the plate is in the shape of a ?attened letter M so that its one side positions the spring centrally thereof and the'other side positions the pointed arm centrally thereof. _ 12. In an electric switch, an actuating struc ture including a switch cover plate having a pair of apertured lugs extending outwardly of the plate; a pin carried by the lugs of the ‘plate in the apertures thereof; an actuating lever pivotally _ carried by the pin; and a shell carried by the plate for mounting the latter on a supporting plate, the inner walls of the shell engaging the ends of the pin to restrain endwise movement of the latter, and said shell having a pair of slots through which the lugs extend, to prevent turn ing of the shell relatively to the plate. 13. In an electric switch, an actuating struc ture including a switch cover plate having an aperture therein, and having a pair of apertured lugs extending outwardly of the plate,- said lugs . ' being disposed on opposite edges of the aperture; a pin carried by the lugs or the plate in the apertures thereof; an actuating lever pivotally carried by the pin and passing through the aperture in the plate; and means carried in the aperture of the plate for mounting the latter on a supporting plate, including means for preA venting endwise movement of the pin in the lugs. which the remaining planar portion of the con tact member is at right angles to the inner planar 14. The invention as de?ned in claim 13, in which themeans carried in the aperture of the plate includes a threaded barrel having a shoul der and a ?ared-over end engaging the edges of portion, and has lateral engagement with the the aperture‘ of the plate, said barrel enclosing casing to counteract edgewise pressure on said the lugs 01 said plate. in the groove of the casing so as to present up wardly a curved, wedging contact surface and in curved wedging contact surface. ' ~ 15. The invention as de?ned in claim 13, in 8. In an electric toggle switch, a box-like in- ' which the means carried in the aperture'of the sulating casing having a bottom, side walls and plate includes a threaded barrel having a shoulend walls, and having a pair oi.’ vertical slots, one der and a ?ared-over ‘end engaging the edges at each or‘ the corners formed by the two side» of the aperture of the plate, said barrel enclosing , walls and one of the end walls,‘ each or said the lugs of said plate, and in which the portion slots separating the end wall from one of the of the plate around the aperture therein is raised side walls, and having in one of its edges a longi to form an internal ?ange which is held between tudinal groove; a pair of contact members ?t the shoulder and ?ared-over end of the barrel.’ 16. In an electric toggle switch, the combina-' ting one into each or said slots, each. of said tion of a box-like insulating casing having a bot members having a pair or biplanar portions re 70 side walls and end walls, and having a 10 spectively engaging the edges of its supporting tom, ormed slot, and one‘ or said pair inter?tting with the of vertical slots, one at each of the corn e ‘end walls groove of said edge; a contact bridging member bythe two side walls and one each or said slots sep ng a side wall irom adapted to bridge the pair of contacts to elec or contact members ?tting trlcally connect these together; and spring-urged. the end wall; a lever actuated toggle means for moving the one into each of said slots, each or said members ./ ' 2,134,038 having a contact bar disposed within the casing spring-urged’ toggle joint between ‘the contact and 1 a connection lug extending through the slot and out of the casing; a cover plate fastened bridging member and the switch lever whereby movement of the lever in one direction will cause to the insulating casing, said plate having an the contact bridging‘member to snap to a posi aperture'therein and having a pair of apertured tion of rest engaging the contacts of the casing lugs extending outwardly of the plate,‘ said lugs ' to electrically connect these, and'movement of being disposed on opposite sides of the aper the lever in the other direction will cause the ture; a pin carried by the lugs in the apertures thereof; an actuating lever pivotally carried by the pin and passing through the aperture in the contact bridging member to snap to a position of rest away from the contacts or the casing so as to open-circuit said contacts; and means carried in 10 plate; a contact bridging member adapted to electrically connect the contact bars within the casing; a pair of link members pivotally carried the aperture‘of the plate for mounting the switch by the pin, said members carrying at their other of the plate. 15 extremities the contact bridging member; a on a supporting plate, including means for pre venting endwise movement of the pin in the lugs r - ' ' ARTHUR C. GAYNOR.