Патент USA US2128373код для вставки
A118- 30, 1938- - H. 1_. MEKELBURG CIRCUIT CONTROLLING DEVICE 2,128,373 Aug. 30, 1938.` H. L. MEkx-:LBURG 3 2,128,373 CIRCUIT CONTROLLING DEVICE Filed Feb. 18, 1937 2 Sheets-Sheet 2 l @Mv/MMX ' @MM 2,128,373 Patented» Auhg. 30, 1938-- AUNITED STATES PATENT o-EFIÍCE omcm'r coN'rRoLLlNG DEVICE Harold L. Mekelburg, Milwaukee, Wis., asslgnor l to Cutler-Hammer, Inc., Milwaukee, Wis.,y a cor- f poration of Delaware Application February 18, 1937, Serial No. 126,367 10 Claims. (Cl. 20o-_6) This invention relates to'circuit controlling de comprising a frame 9 having a ‘rear wall I0 and vices; and while not limited thereto‘is particu top and bottom.walls II and I2, and an asso- ' larly applicable to multi-pole reversing switches ciated U-shaped cover I3. More speciñcally, contact element I is pro vided with a plurality of molded insulating sec- 5 tions I4 which are mounted side by side upon’ switch consisting of parts which can be economi- ~ an operating shaft I5. Said insulating sections ' for'electric motors. 5 . The invention has among its objects to pro vide an exceedingly compact and rugged control A cally manufactured and readily assembled. Another object is to provide a control switch 10 having cooperating stationary and movable con tact elements of novel form. Another object is to provide a. control switch are of like> construction and as best shown in Figs. 6 and 'l each ofthe same is providedwith a segmental body portion I6 having a cen- l0 tr-ally disposed hub projection I1 on the base thereof which is provided with an opening for 'Y of the aforesaid character in which the sta , receiving shaft I5. The curved face of body por tionary and movable contact elements are made tion I6 is provided with a centrally disposed 15 up almost entirely of molded 4insulating parts v peripheral groove I8 and the side faces of said l5 j and sheet metal stampings. ‘ body portion are each similarly formed to pro Another object is to provide a reversing switch ‘ for electric motors having a plurality of poles each consisting of three stationary `contacts and 20 a cooperating rotatable contact element having a plurality of pairs of 'removable bridging con tacts associated therewith. projections and a grooveI 2I extending between said end projections.. Also the body portion I6 20 ‘ is formed to provide a centrally disposed tongue projection 22 on one face thereofl and a cen ' Various other objects and advantages of the inventiony will hereinafter appear. 25 vide -grooved end projections Ill-I9, key por tions 20--20 extending inwardly from said end . The accompanying, drawings illustrate an ein bodimentof the Vinvention which will now be de scribed, it being understood that the embodiment trally disposed groove 23 _on the opposite face thereof. ’ ~ In the embodiment illustrated there are four 25 insulating sections I4 mounted upon shaft> I5, and as shown in Fig. 1 said insulating sections illustrated is susceptible of modification without are clamped between a nut 25 which is threaded departing _from the _spirit and scope of the ap on s-aid shaft adjacent the lower end thereof and 30 pended claims. a star wheel 26 which is secured to said shaft 30 In the drawings, _ adjacent the~ upper end thereof by a pin 21. The _Figure 1 is a side elevational view of a control insulatingV sections I4 are arranged so that the switch embodying the invention, parts of the tongue projection 22 and groove 23 of adjacent switch being shown in section; ` sections engage to prevent relative rotation of 35 Fig. 2 is a'front elevational view of the con said sections, and as shown inFigs. l and 8 35 trol switch shown in Fig. 1, a cover associated the tongue 22 of the top insulating section en with the enclosing casing for the switch being gages within a recess 28 in star wheel 26 to lock removed; f the said insulating sections against rotation with Figs. 3 and 4 are sectional views on lines 3-3 respect to shaft I5. The hubs I1 -of insulating 40 of Fig. 1 illustrating the switchin ofi position sections I4 are of such length that ya narrow -40 and in one of its on positions; space is provided between the opposing faces of ` Figs. 5, 6 and 7 are perspective views of cer adjacent end projections I9. Also the insulat tain of the parts shown in Figs. l and Z; ing sections I4 are assembled upon shaft I5 with Fig. 8 is a sectional view on line 8-8 of Fig. coil springs 30 between the opposingrfaces of 46 2, and _ Fig.` 9 is a diagrammatic view illustrating a typical circuit arrangement for the control switch shown in Figs. 1 and/,2L ~ . , l _ The control switch' illustrated in the drawings 50 includes a rotatable contact element I having a plurality of pairs of insulated bridging contacts 2, 3 and 4 associated therewith which- cooperate with sets of stationary contacts 5, 6 and 1, re spectively, carried by an insulating base 8. Said 55 parts’ are mounted within an enclosing'casing said sections, said springs being held in position 45 by the opposing faces of the grooves 2l.. 'I‘he three pairs of bridging contacts are re movably mounted between the opposing faces-of the four insulating sections I4, and as shown in Fig. 7 each of said bridging contacts comprises 50 an elongated sheet metal stamping‘SI having curved contact portions 32-32 on opposite ends thereof and an intermediate shank '33 which is of reduced width to provide opposing shoulders » 34--34 on opposite sides of the contact. Also 55 2 2,1as,srs the shank l! is provided with a 'centrally ar ranged enlarged portion 35 having a struck out and as shown in Fig. 5 each of the same comprises an elongated sheet metal stamping formed to pro vide a terminal portion 54 and a hook contact projection Il on one face thereof. As is ap parent from Fig. 'l the shank 3l on each of the portion 55 on one end of said terminal portion. bridging contacts h insertable edgewise between , Insulating _base Il is provided with individual openings 55 for receiving the several stationary _ the end projections Il-IS ot its in sulating sections I4 into a position wherein the contacts and as shown in Figs. 1 and 3 the rear same clears said end projections. The contact ` face of said insulating base is 4formed to provide can then be rotated about its longitudinal axis V-shaped projections 51 for engaging the hook into a position wherein the shoulders 5_4 on~ op contact portions 55 of the several stationary con posite sides thereof interlock with the side faces tacts. 'I'he terminal portion 54 of each contact is -of the key portions 20 on the opposing faces of bent over in the directionof its hook contact por tion 55 to engage the front face of insulating base the associated insulating sections I4. As is ap parent, the contact is then locked against both 15 lateral and longitudinal movement with respect 8 and as shown in Fig. 5 said terminal portion is provided with an opening 5B to facilitate bend 15 ing thereof. As is apparent from `the foregoing, the stationary contacts are securely held‘within the openings 56 in insulating base 8. The ter to its associated insulating sections I4. Also the contact is biased to move outwardly under the action ot its associated spring 30, such movement Abeing limited by engagement of its shank 3l with - minal portion 54 of each stationary contact is provided with a tapped opening 59 for receiving a 20 the shoulders formed by end projections I9 on the associated insulating sections. The bridg binding screw and is also provided with a wire re-4 ing contacts are thus normally held in engage ceiving opening 60 for receiving connections which ment with their associated endprojections I! may be arranged as shown in Fig. 2. _ and said projections are so designed that each 25 pair of contacts is normally held in substantial ly parallel relation as illustrated in Fig. 3. - As Y is apparent, thebridging contacts when mounted as hereinbefore described are adapted to rock As shown in Figs. 1 and 2 the front face of in sulating base 8 is provided with horizontally ar ranged ribs 6I ' which form horizontal wiring passages in the spaces between the sets of sta tionary contacts 5-6 and 6_1. Also as shown upon the ends of their associated springs 30 and In Figs. 1 and 2 the rear face of insulating base 30 are also held in assembled position upon insulat-' I is provided with rearwardly projecting side ribs 62--62 and a plurality of horizontally 'arranged ribs 63 extending between said 'side ribs, the lat ter ribs being alined with the grooves IB in the insulating sections I4 and acting as barriers be tween the sets of contacts. As is apparent, the ing sections I4 by said springs. Shaft I5 is journaled within openings in the top and bottom walls II and I2 o! bracket 9 and the upper end thereof has an operating lever 31 35 flxedlthereto. As hereinbefore stated, shaft I5 has a star wheel 25 secured thereto by a pin 21 and as shown in Figs. 6 and 8 the periphery of said star wheel is provided with notches 3B, I! and 40 to be engaged by a roller 4I. Roller 4I 40 is rotatably mounted upon a lever 42 whichis contact element I is movable in opposite direc tions out oi the intermediate position shown in Fig. 3 to bridge stationary contacts b with sta tionary contacts a. _and c selectively. Referring now to Fig.' 9 the above described 40 pivoted as shown at 43 upon a bracket 44 ilxed control device is shown as connected to establish to the top wall II of frame 9. Lever 42 is biased _ reverse power connections for a three phase al to maintain roller 4I in engagement with the ternating current motor M. A supply circuit for periphery o! star wheel 25 by a spring 45 which is said motor is indicated by lines L1, L2 and L3, and 45 connected between the free end of said lever and a as is apparent upon movement of contact element projection 46 on bracket 44. As is apparent, roller I4 into a position to engage stationary contacts a 4I cooperates with notch 39 to yieldingly hold and b the supply lines L1, L2 and L3 are respec contact element I in an intermediate position tively connected to terminals T2, T1l and T1i of shown in Fig. 3, and said roller also cooperates the motor. However, upon movement of Contact 50 with notches 38 and 40 to- yieldingly hold said element I into a position to bridge stationary con 50 contact element in opposite extreme positions, one tacts b and c the supply lines L1, L2 and L3 are of which is illustrated in Fig. 4. respectively connected to terminals T3, T1 and T“ As hereinbeiore stated the pairs of bridging of the motor. It is, of course, apparent that the contacts 2, 3 and 4 cooperate with sets of sta above described control device may be connected 55 tionary contacts 5, 5 and 1, respectively, carried to establish reverse power connections for motors 55 by an insulating base 8. « Insulating base 8 is - formed oi.' molded insulating material and is ar ranged in front of contact element I. Said in sulating base is rectangular in form and- the upper side oi said base is provided with a pair oi supporting lugs 48-48 which _are secured lto bracket 44 by screws 49 while the lower side thereof is provided with a supporting lug 50 which is secured by a screw 5I to a bracket 52 fixed to the lower wall I2 of trame 9. - The three sets oi' stationary contacts 2, 3 and 4 are horizontally alined with respect to their cooperating pairs of stationary contacts 5, 6 and 1 and each oi’ said sets oi stationary contacts- in 70 lcludes three contacts designated by reference characters a, b and c. Contacts b are arranged intermediate the contacts a and c and as shown in Fig. 2 corresponding contacts o! sets 2, 3 and 4 are vertically alined. 75 'I'he stationary contacts are of like construction, of other types. - What I claim as new and desire to secure by . Letters Patent is: ' l. In an electric switch, in combination, co operating stationary and movable contacts, a 60 support for said movable contacts comprising molded insulation having formed therein cavities to,support said movable contacts and to permit rocking movement thereof individually, and springs mounted within said support for normal¢ 65 ly holding said movable contacts in given posi tions and to oppose rocking movements thereof, said movable contacts being removable from said support by manipulation and said support being provided with shoulders for engaging said con 70 tacts to secure the same against dislocation by forces met with in normal operations. 2. In an electric switch, in combination, co operating stationary and movable contacts, sup porting means for said movable contacts com 75 2,128,373 prising molded insulating sections arranged side by side and having formed therein comple mentary cavities to receive and seat portions of said movable contacts for rocking movement of theA latter individually, and springs mounted > 3 with shoulders to secure said contacts against dislocation by normal forces while permitting their ready removal by manipulation. 7. Inan electric switch, the combination with an insulating base having an opening therein, of between said insulating sections to yieldingly- a combined contact and terminal member com prising a reflexed metal strip mounted within hold said movable contacts in engagement with their> cooperating seats and to oppose their rock ing movements, said 'contacts being removable 10 from said support by manipulation, and said in sulating sections being formed with shoulders which cooperate with said-movable contacts to prevent dislocation thereof by forces met with in normal operations. 15 3. In combination, stationary contacts, cooper ating movable contacts each comprising a shank having contact portions at opposite ends there of, a molded insulating support for said movable said opening and having a hook contact portion and a terminal portion engaging opposite faces of said base, one of the faces of said insulating base being formed to fit within said hook contact portion. ' , 8. In a reversing switch for electric motors, in combination, a rotatable insulating support hav ing a plurality of pairs of bridging contacts yield ingly mounted thereon, each of said pairs _of bridging contacts being arranged in opposed rela tion on opposite sides of the axis of said support, contacts formed to provide cavities to receive and - .and said support being rotatable in opposite di seat the shank portions of said movable contacts rections out of an intermediate off position into extreme on positions, a ñxed insulating base and for rocking movement of the latter contacts in dividually, and springs mounted within said sup a plurality of stationary contact sets mounted port to yieldingly hold said movable contacts in ‘upon -said base- each associated with one of said their seats and to oppose their rocking move ments, said movable' contacts by manipulation being readily removable from said support and said support being formed with shoulders secur ing said cooperating contacts against dislocation by forces met with in normal operations. 4. In combination, stationary contacts,b cooper ating movable contacts each comprising a shank and contact portions at opposite extremities of said shank, a drum support for said movable con tacts comprising a plurality of insulating sec tions mounted side by side and having cooper ating faces formed to provide cavities to receive and seat the shanks of said movable contacts for rocking movement of the latter individually, and springs mounted between said sections to yield 40 ingly hold said cooperating contacts in their seats and to oppose their rocking movements, said sec tions providing slots enabling said contact shanks by manipulation to be inserted in their seats and to be removed at will, and said sections being 45 molded with shoulders securing said cooperating contacts against dislocation by forces met with in normal operation. 5. In combination, cooperating stationary and movable contacts, a molded insulating support 50 for said movable contacts having formed therein cavities to receive and seat a pair of `said movable> ~ contacts in an opposed relation for rocking move ment of the latter individually, and a cpil spring mounted in said support and interposed between 55 said opposed contacts to yieldingly hold both in their seats and to oppose their rocking move ments, said cooperating contacts being remov able from said support by manipulation, and` said support being _formed with -shoulders securing said cooperating contacts against dislocation by pairs of bridging contacts, each of said stationary contact sets including a contact‘z to be selectively 25 engaged by its associated bridging contacts in the extreme on positions of said support and two con tacts arranged on opposite sides of said former contact each to be engaged by one of its associ ated bridging contacts in one of the extreme on 30 positions of said support. 9. In a reversing switch for electric motors, in combination, a rotatable insulating support hav ing a plurality of pairs of bridging contacts yield ingly monuted thereon, each of said pairs of 35 bridging contacts being arranged in opposed rela tion on opposite sides of theaxis of said support, and said support being rotatable in opposite di rections out of an intermediate oiî position into extreme on\positions, a I‘lxed insulating base .of 40 molded> insulating material having ribs extend ing transversely of the paths of said bridging con tacts, and a plurality of stationary contacts car ried by said base to cooperate with said bridging contacts in the extreme on positions of said sup port, each of said stationary contacts comprising 45 a refiexed metal stamping having a hook contact portion ñtting over one of the ribs on said base and a terminal portion extending through said base for securement and wiring. 50 10. In a reversing switch for electric motors, in combination, a rotatable insulating support hav ing a plurality of pairs of bridging contacts yieldingly mounted thereon, each of said pairs of bridging _contacts being arranged in opposed re lation on opposite sides of the axis of said support and said support being rotatable in opposite di rections out of an intermediate off position into extreme on positions, a fixed insulating base of molded insulating material havingone of its faces 60 formed to provide a plurality of ribs extending at right angles to the axis of said insulating sup port and located between each of said pairs of bridging contacts' and a plurality oi’ projections extending between said ribs and a plurality of 65 stationary contacts carried by said base to coop erate withl said bridging contacts in the extreme adjacent drum sections for seating within the' on positions of said support, each of said station forces met with innormal operation. 6. In a movable switch element, in combina tion, a shaft, drum sections of molded insulation mounted on said shaft, said drum sectionsj being 65 alike and interlocking and each being molded with cavities in opposite sides, a plurality of con tacts each having a portion insertable between cavity provided jointly by such adjacent drum . ary contacts comprising a reilexed metal stamp sections, and springs mounted in cavities in said drum -sections to bear against and to hold said ing having a hook contact portion ñtting over one of the projections on said base and a terminal contacts seated, saidv contacts having rocking movement in¿ said cavities against the bias of ment and wiring. said springs and said drum sections being molded y portion extending Jthrough said base for secure ' > _ HAROLD L. MEKELBURG.