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Nov. 8, 1938. w. TRAUTNER 2,135,958 ROTARY-SWITCH ASSEMBLY Filed Oct. 29, 193'? s Sheets-Sheet 1 Q42 46 .(E , 47/“. » uvmvron WAGN TRAUTNER. NOV. v8, 1938. w_ TRAUTNER ' 2,135,958 ROTARY SWITCH ASSEMBLY ‘Filed Oct. 29, 1937 3 Sheets-Sheet I 2 IKVENTORT WA GN TRA U TNER. BY I ‘ , g?A/leizdf A TTORNEYS. Nov.’ 8, 1938. . w_ TRAUTNER 2,135,958 ROTARY SWITCH ASSEMBLY Filed Oct. 29, 1957 ' :5 SheetslSheeL 3~ IN VENTOR.r WAGN TRAUTNER. B: Y . ?nial/1,‘ ATTORNEYS. \ Patented Nov. 8, 1938 2,135,958 UNITED STATES PATENT OFFICE 7 2,135,958 noraay'swrrcn ASSEMBLY I Warn 'h'autner, Sprlngdale, Ohio, assignor to E. H. Kneffer, Oakland, Calif. Application 0mm 29, 1937, Serial No. 171,019 8 Claims. (of. 200-43) My invention relates to rotary switches, and switch shaft itself is rotated by action of the more particularly to that type of friction driven e'éiscimzcd and claimed in the Clarence 13. Howard Patent No. 2,103,287, patented December 5 28, 1.933’, for a "Double circuit rotary switch”, Among the objects of my invention are: to pro vide- a rotary switch which is easily and quickly assembled; to provide a rotary switch which is _ virtually weatherproof; to provide a rotary switch 1“ having the minimum number of parts; to provide a rotary switch that can be manufactured and assembled cheaply; to provide a rotary switch which may be assembled and permanently locked , in assembled position; and to provide a rotary M switch that is sufficiently rugged and weather proof to withstand use on a portion of a vehicle subjected to mud and water. Other objects of my invention will be apparent or will be speci?cally pointed out in the descrip m tion forming a part of this speci?cation, but I do not limit myself to the embodiment of the inven tion herein described, as various forms may be adopted within the scope of the claims. ~ ‘ In the Howard application cited above, the in 25, ventor has described and claimed a rotary switch for use in conjunction with a vehicle signalling system, and in order that the rotary switch be operated in synchronism with the steering gear of an automobile, ?ttings are provided whereby the so switch may be fastened to the quadrant nut, as described and claimed by the same Howard in an other application entitled “Vehicle signaling sys tem”, rial No. 135,921, filed April 9, 1937. When fastened to the quadrant nut of the Va“ 35 hicle steering gear the switch is usually immedi ately back of the left front wheel, and in that posi tion is subjected to a continuous throw of mud and water as the wheel rotates in wet weather. Furthermore, it is in a position beneath the front 49 fender, which is seldom cleaned, and when such cleaning does take place, it is usually subjected to a stream of water from a high pressure hose. It is therefore extremely important that the cas tug of the switch be virtually water and mud i“; tight, and remain so during the useful life of the switch. ' , Furthermore, it is only the rotating actuating shaft of the switch which is attached to the quadrant nut, and it is necessary, to obtain chi so cient operation of the device, to stabilize the case i :5‘. ii have therefore provided aswitch assembly .JZBIQS the switch completely ' weather~ and which, at the same time, provides a. by which the case may be stabilized and ,i'ireveuted from rotating during the time the steering gear. Accordingly, I have seen fit to describe my in vention as applied to one preferred form of switch assembly, shown in the drawings, wherein 5 Fig. 1 is a side view of the completed switch. Fig. 2 is an end view of the switch casing on the side away-from the steering gear connection. Fig. 3 is a top view of the switch casing, com bined with a sectional view of the quadrant nut 10 adapter. Fig. 4 is a sectional view of the quadrant nut adapter, as indicated by the line 4-4 in Fig. 3. Fig. 5 is a cross sectional‘ view of the completed switch after the casing has been applied. 15 Fig. 6 is a cross sectional view taken at right angles to the view of Fig. 5, looking down from above. » Fig. 7 is a view partly in elevation and partly in section, taken as indicated by the line 1-1 in '20 Fig. 6, and in the plane of elements 4|. , Fig. 8 is a view partly in section, taken as indi cated by the line 8—-8 in Fig. 5. Fig. 9 is a view taken from the same location as Fig. 8, showing the alternate position of the fric- 25 tion driven disc. . Fig. 10 is a view looking down upon the switch assembly, as applied to a vehicle. For the detailed description of the preferred form illustrated, I will refer ?rst to Figs. 5 and 6. 30 A switch shaft l is provided with ayknurled por tion 2 on which is moulded a slip ring disc 4 of in sulating material. As an insert moulded therein is a peripheral ring 5, extended along one face of disc 4 to form a flat brush surface 6. Thus the 35 shaft I, the slip ring disc 4, the peripheral ring 5 and the brush 6 become an integral unit for assembly purposes. Beyond the knurled portion 2 is a contact disc bearing surface "I, a slightly smaller washer bear- 40 ing surface 9, and an end bearing surface i0. Shaft‘ l terminates in a half round boss H, the purpose of which will be described later. Utilizing the unitary shaft and disc as a basis, the switch may be assembled by vslipping over 45 the large end of shaft i a disc shaped inner cas ing wall l2 of insulating material having a cen-4 tral metallic bearing l4. On the opposite side of disc 4, and bearing against shaft surface 1, is positioned a contact rotor l5. This rotor is 50 free to rotate upon bearing surface 1 of shaft I, and is provided with two opposite circular brush bearing surfaces 16 and I1, preferably on the pe riphery of the rotor. _ The rotor I5 is also preferably moulded from 55 2 2,1as,esa insulating material, and has inserted therein a developed by disc 4 against brushes 2| and 22 pair of metallic inserts comprising peripheral contacts I9 and 20 prolonged to form double brushes 2| and 22 extending from the face of the rotor adjacent the disc 4, the ends of the will rotate rotor I! in the same direction as disc 4, until lug 24, for example, as shown in Fig. 8, contacts brush 32. The rotor will then stop rotating, although disc 4 will keep on rotating. Inasmuch as brush segments |9 and 20 are in brushes 2| and 22 contacting brush surface 6 on disc 4. The rotor I5 is also provided immediate the center of brush surfaces I6 and I1 respec ly adjacent each brush surface l6 and H with tively, when the rotor is in the position just stop ears 24 and 25. 10 Brushes 2| and 22 are bent outwardly and are made of resilient material, so that when a washer 28 is assembled to rotate freely on the washer surface 9 of shaft |, pressure will be exerted be tween rotor |5 and disc 4 by virtue of the resil 15 iency of the brushes. After washer 28 has been placed on the shaft, front casing wall 26 is as sembled on small end H! of shaft I, this front above described brush contact 34 will not make electrical connection to brush segment I9, where ~10 as on the other side of the rotor, brush segment 20 will be brought into electrical contact with brush contact 34. Electrical connection will be established through brush 22 to brush surface 6 on the disc 4, and thence to common brush 32 15 through the peripheral ring 4. comprises a U-shaped body ?tting the pin at each end, the base of the U-shaped body being bumped When the direction of rotation of the steer ing gear is reversed, as shown in Fig. 9, the op posite condition will obtain. The circuit that was formerly closed will open, and the opposite 20 circuit will close. Thus, an electrical circuit is established through the switch upon each re versal of rotation of the main shaft I, or when applied to a vehicle steering gear 46. In some instances, however, it is advisable to 25 prevent any circuit through the switch when the vehicle steering gear is in straight-ahead po up into brush contacts 34. sition, and for that reason an insulating seg casing wall 26 being identical in all respects to rear casing wall l2, i. e., is of insulating mate rial and with a central bearing 21. Three brush pins are provided extending be tween the end walls 26 and accurately posi tioning them, namely, lateral brush pins 28 and 30 and common brush pin 3|. U-shaped brushes 32 are positioned on each pin, and each one All three brushes are prevented from rotating on the pins by lugs 35 ment 50 is provided in the slip ring 4, so that at each end of the base of the U thereof enter when the brush contact attached to the com 80 mon pin 3| bears on this insulating segment, no current can be established through the switch. In attaching the switch to the steering gear, it ing recesses in each end wall. The brushes mounted on lateral pins 29 and 30 are so positioned that the brush contacts 34 press against the peripheral brush surfaces l6 and H on the rotor, whereas the brush mounted on common pin 3| is reversed and contacts the peripheral ring 5 on the disc 4. Each of the brushes terminates on one side of the case in connection screws 36 to which circuit wires may be connected. The outer casing is made in two halves, an upper half 3'! and a lower half 39. Each of these halves is provided with peripheral grooves 40 ?tting the end walls I2 and 26, and with lat 45 erally extending portions 4|. I prefer to make the circular portions of these parts very slightly smaller in diameter than the diameter of the end walls, so that the two halves may be forced together under pressure applied to the laterally extending portions and thereafter locked to gether as, for example, by riveting one half into the other on the laterally extending portions, as indicated by circles 42 thereon. Spot weld ing is, of course, a full equivalent. The pres sure applied causes the casing halvesto grip the end walls and make a weather tight seal there to. Furthermore, the pressure exerted by brushes 22 causes disc 4 to be forced tightly against bear ing M in one wall, and washer 28 to be forced 60 tightly against the other end wall, thus sealing the end bearings. After the switch has been assembled, an adapter 45, ?tting the quadrant nut on a steer ing gear 46 attached to the frame 41 of a vehicle 65 is applied, and is attached to the shaft l and locked thereto by shaft screw 48. The switch body, comprising upper and lower halves 31 and 39, together with the end walls l2 and 26, is prevented from rotating and is supported by 70 case ?ttings 49, preferably extending from frame 41 of the vehicle and entering the apertures 42 developed by riveting. The operation of the switch is simple. When the steering gear is turned in one direction, disc 75 4 will rotate in one direction and the friction is obvious that quadrant nuts may be in various positions of rotation thereon, and it is therefore desirable that the brush contact attached to the common pin 3| be on the insulating segment 50 without necessitating opening the case. This condition may be readily obtained by loosening shaft set screw 48 and turning the switch from 40 the outer end by the use of a tool applied to the half round end ll of shaft | until the circuits are both broken. Set screw 46 may then be tightened up, with the assurance that the switch is properly adjusted for the condition of the steering gear. Another point should be brought out, and that is that while in many instances the friction fit of the two halves 31 and 39 of the casing may be sufficiently strong to prevent rotation of the end walls within the casing, there may be instances in relatively heavy duty installations, such as that on heavy trucks, where the torque within the switch, due to heavy duty contacts, may be sufficient to rotate the end walls within the case. While this possibility is remote, I prefer to pre vent it, and do so by preventing the end walls from rotating on the assembled casing by provid ing a casing groove 5| on the outside of each wall, and where the two casing halves join I extend end wall material into grooves 5| at the points where the two halves join, thereby forming lugs 54 contacting both halves. Thus, when the casing is locked on, these lugs prevent any rotation of the casing on the end walls. Furthermore, I do not depend on pins 29, 30 and 3| with screws 36 to hold the case together and therefore if screws 36 should become loose the case will hold the switch together. I have therefore provided a switch of heavy duty construction and one which is completely weatherproof and adapted to be utilized on steer ing gears in locations exposed to large quantities of mud and water, and have also provided a switch that is easy to assemble and which has a 3 / 7 minimum of parts andno delicate adjustments whatsoever. - I claim: cooperating with both of said covers to prevent relative rotation oi’ said end ‘walls with respect to the completed cover. . 1. A rotary switch assembly comprising a shaft, make and break means mounted on said shaft 5. A rotary switch comprising a shaft, spaced circular end walls bearing on said shaft, a pin. 5 and actuated thereby, circular end walls bearing rality of spacing pins extending between said on said ‘shaft, means for ?xing the minimum dis ‘end walls and having shoulders thereon bearing tance only between said end walls, resilient means - against said end walls and determining the mini urging said end walls apart, a pair of semi-cylin mum distance only between said end walls, a pair 10 drical covers having lateral extensions thereon, of make and break means mounted on said shaft peripheral recesses in said covers and ?tting the peripheries of said end walls, said recesses deter mining the ?nal desired spacing of said end walls, between ‘said end walls, resilient means between said, make and break means and urging said make and break means apart against said side walls and means for locking said covers together around v thus tending to increase said minimum distance, 15 said end walls to form a complete case. a cover engaging the periphery of both of said 2. A rotary switch assembly comprising a shaft, make and break means mounted on said shaft end walls and closing the space between, said cover having spacing means thereon. cooperating and actuated thereby, circular end walls bear ing on said shaft, means for "?xing the minimum distance only between said‘ end walls, resilient means urging‘ said end walls apart, a pair of semi-cylindrical covers having‘lateral extensions thereon, peripheral recesses in said covers and ?tting the peripheries of said end walls, said re 25 cesses determining the desired spacing of said end with said end walls to maintain said end walls at said minimum distance irrespective of the urge walls, and means for locking adjacent extensions together after said covers are applied around sai against said end walls and determining the‘mini mum distance, only between said end walls, a end walls to form a complete case. pair of make and break means mounted on said ‘ of said resilient means, and means for interlock ing said coverv'and said end walls. ' i 6. A rotary switch comprising a shaft, spaced circular end walls bearing on said shaft, a plu rality of spacing pins extending between said end walls and having shoulders thereon bearing shaft between said end walls, resilient means be 30 make and break means mounted on said shaft tween ‘s'aid make and break means and urging and actuated thereby, circular end walls bearing said make and break means apart against said 3. Alrotary switch assembly comprising a shaft, side walls thus tending to increase said minimum ' distance only between a said end walls, resilient distance, a pair of semi-cylindrical covers hav means urging said end walls apart, a pair oi.’ semi— ing lateral extensions thereon, peripheral grooves cylindrical covers having lateral extensions there ’ in said covers ?tting the peripheries of said end 35 on said shaft, means ‘for ?xing the minimum on, peripheral recesses in said covers and ?tting the, peripheries of said end walls, said recesses determining the desired spacing of said end walls, means for locking adjacent extensions together 40 after said covers are applied around said end walls to form a complete case, and means interlock in'g said covers andsaid end walls to prevent relative rotation. ' - 4. A rotary. switch assembly comprising a ‘shaft, ' make and break means mounted on said shaft , and actuated thereby, circular end walls bearing on said shaft, means for ?xing the minimum dis tance only between said end walls, resilient means urging said end walls apart, a pair of semi-cylindrical covers having lateral extensions thereon, peripheral recesses in said covers and ?tting the peripheries of said end walls, said recesses determining the desired spacing oi’ said end walls, means .for locking said covers together 55 around said end walls to *form a complete case, ands-houldermeansoneachotsaidendwalls, walls, said grooves determining the spacing of said end walls substantially at said minimum dis tance, and means for interlocking said covers together thereby ?nally spacing said end walls against the urge of said resilient means. 40 7, Apparatus in accordance with claim 6, wherein stationary contact brushes are mounted on a plurality of said spacing pins in a position to cooperate with each of said make and break means. 8. Apparatus in accordance with claim 6, wherein stationary contact‘brushes are mounted on a plurality of said spacing pins in a position to cooperate ‘with each of said make and break means, each oi’ said brushes having a portion 50 clamped between a shoulder on the spacing pin carrying said brush and having another portion entering a recess in the end wall adjacent the clamped portion to prevent said brush from, turning, WAGN 'IRAUTNER.