US1158955A - Switch. - Google Patents

Description

:r6 a, I 60 j? f4] SSSSS H.

v. 19.1914. Y t 1,158,955. Patented Nov. 2, 1915.

2 SSSSSSSS HEVET V. G. APPLE & W. MVS. MILLER.

SWITCH.

APPLlcAloN mw Nov. x9. 1914.

PnrenteqNov'. 2, 19Vl n g m L u 7 1v 00-1./ 7 f i 2 Q/ A.. 9.

VINCENT G. APPLE, or DAYTON, oHIo, nND WILLIAM in. s. MILLEE, or MILWAUKEE, I

wIsCoNsIN; sain MILLER AssIGNoE To TEE AEPLE ELECTEIC COMPANY, '0E LAY- ToN, oIIIo.

SWITCH.v

Specification of Letters Patent.

Patented Nev'. 2,1915.

Application filed November 19, 1914. Serial 110.872,933,

United States, residing, respectively, atA

Dayton, in the county of Montgomery and State of Ohio, and at Milwaukee, in the l county of Milwaukee and State of Wisconsin, -have invented certain new and useful Improvements in Switches, of which the following is a specification2 This invention relates to improvements in switches and more particularly to/a. switch adapted for use vin gas engine electric mo' tor-generator starting systems.

One'of the objects of our invention is to provide a switch of rugged, sturdy and simple construction inclosed iii a weather proof.

casing and operable through the medium of a reciprocable plunger.

Another object is the provision of a switch having eight Contact points, four of which are normally in engagement with a pair of switch blades and the other four of which are engaged by thel blades when the plunger is'depressed.

vStill a further object of our invention is the simplicationfof switches of the. type having their movable switch members resiliently connected to the actuating vpart thus insuring quick, snappy breaking and making ofthe electrical connections.

Other and further objects will become apparent to those skilled in the art from a consideration of the following description and drawings, wherein- Figure 1 is a rontelevation of our'improved lswitch with the leasing cover removed. F ig. 2 is a sideeleva'tion. Fig. 3A

isa vertical, sectional view on the line 3--3 of Fig. 2. -F ig. '4 is a horizontal, fragmentary sectional`.view on the line 4-4 Fi 3. l n general closing casing 10 within which is reciprocably mounted a plunger 11 to whichis resilieiitly connected 'i`a i pair Vof il- shaped switchblad'es 12 and 13, adapted to make contact whenV in their normaliuppermost position'with ngers 14, 15,16 and 17 and when the'plunger is depressed making engagement with Contacts 18, 19, 20 and 21.

The switch blades are 'slidalole on the actuating plunger andresiliently connected thereto by meansof 'two opposing springs secured tothe plunger above and below the the structure comprises an inblades. l 'Ifo liii/sure a quick, snappy making and breaking of the connection we have provideda latch device that holds the blades intheir previously assumed position until one or the other of the springs above referred to has beeniconsiderably compressed, when the latch will release and permit the compressed 'spring to throw'the, blades from one posiing perforations 23 at its upper corners and perforated lugs 24 projecting from its side to provide means for securing the'apparatus to the frame 25 or other suitable parts of a motor vehicle.v Projecting from the back piece 22 is a bottom wall 26, side walls 27--27 and an arcuate top wall 28 forming a box like structure over the opening of lwhichis positioned a. removable cover-29 secured to the walls of the casing by means of screws 30.

The vertically reciprocable rod 11' passes through the walls 28 and 26. of the casing and is normally held in its uppermost position by meansof they relatively ystid spring 31 bearing-at its lower end on-the outer face of the /wall 28 and at its upper= end upon the nut 32 screw threaded upon the upper portion of the plunger. A oot pedal, or button 33, is mounted on the extreme vupper end of the plunger 1 1," and the casing is so la diameter greater than that ofits plunger so as to receive a coil spring 37, the purpose of which we will later describe. rllhe tubular extension 35 makes a -sliding-it with the l plunger.

The two V- shaped switch blades 12 and 13 are provided at their inwardly projecting ends with horizontal sections perforated to receive the tubular part 35 and 'are secured thereon by means of the nut 38 screw thread-A ed upon the extreme lower `end of thetube.' The blades are electrically insulated from each other as well as fromthe tubes-35, the

thimble 34 and the nut 38, by means et the ber washers 39 and bushings 46.'` `'llhe thimble 34 is provided at its opposite sides with an upper and a lower pair oit vgrooves 41, 42, alternately engaged by 'the spring pressed balls 43-43 ,'llhe iront and rear faces ot the thi-roble are cutaway on parallel planes,.the rear face making sliding contact with the base wall 22.. Oppositely positioned tubular projections 44-44 extend inwardly from the vertical walls 27 of the casing .and contain'the balls 43-43 together with their coil springsp45--45. illlhe resilient pressure ci the spring pressed balls 43-43 against a-pair o1 the grooves, as for example grooves 42-42 or the thimblel 34, resists movement ot the thinible until the pressure exerted thereon overcomes the pressure eX- erted by the pair of springs 45-45 and permits the wedging or the balls out of the path of the ridges 41-'41 lying between the pair of grooves 41-41 and 42-42.

rlhe lower end of the spring 37 iits within the yopening 36 in the upper end of the thimble and at its -upperend bears against 'thev -washer 46 secured from vertical movement on the plunger by means of a Cotter pin 47.

LA similar plunger encircling spring 48 the spring pressed vballs 43-'43 hold the pressed-upwardly against the lower end vof the thirnble, engages the end of the tubular portion 35, its lower end pressing'against a Washer 49 secured from downward movement on the plunger 11 by 'means ofthe cotter pin 50. Fromv so much of the description it will be evident that the box switch blade-carrying thirnble is slidable upon the operating plunger 11, its movement in either direction being communicated to it from the plunger through one or the other of the coil springs 37-48.

When in the position illustrated in Fig. l,

thimble and switch blades in their uppermost position. Downward pressure upon the plunger compresses the spring 37 until its 'force is sufficient to overcome the side pressure of the springs 454-' and wedge A the balls 4.3-4.3 out of the grooves 42-142,

permitting the stored `energy of the spring 36 to quickly throw the thimble together with the blades .downward until the balls 43-43 en age' with the upper set of grooves 41-41. n the reverse movement of the plunger the spring- 48 is compressed until its force is suhcient to overcome` the lhorizontal thrust of the spring pressed ball l4? 43 against the ridges 41-41.

As the contacts 18-19 and 20--21 carry the heavy current required for starting;1 the engine we have formed each ci these from a plurality ot' metallic strips secured at their lower ends in h-shaped vholders 16;-19 and 20-21. Binding posts 51, 52 extend outwardly from the vertical legs oi" the holders 18V- 21' through the walls 27--27v oi the vcasing, being insulated therefrom by the ings 61. The upper adjacent ends of the pairs of contacts 18-19 and 20-21 are beveled oil' to engage` theouter edges of the V- shapcdblades 12 and 1'3.

At'theupper corner of the right hand wall 27 below the tubular projection 44 a r.

binding' post 62 extends through the wall carrying' at its .inner end a .screw head 63 overlyingthe strip 64, the upper end ot' which is hoolred yinwardly and downwardly to form the Contact` finger 17. Parallel with the strip 64 and insulated therefrom by a'ber strip 65, is a second strip 66, the

.upperend of whichterminatesin the contact finger 16, positionedbeside contact iin.- ger 17. 'lhe lower end ofthe strip 66 eX- tends downwardly the'length ofthe wall 27 and into engagement 'with the binding'post 52 at its base where itjjoins the contact holder 21. vBy this construction contact 17 .isfelectrically connected with binding .post t 62 whereas contact ;16 is electrically connected with contact 21 and binding-post v52. At the opposite side wall of the casing a similar binding post 67 extends through the casing' and carries at its inner end the Strip 68. on the upper end of which i's formed the contact linger 15. rlhe contact'l4 as at the opposite side of the casing terminate in 'a vertically extending strip 69 connectedat its lower end with the binding post 51 at the point where it joins the contact holder 18. An insulated'metallic strip 70 extends diagonally across thebaclrwall 22 of the casing being connected at its upper end with contact strip 68 and at its lower end with the binding post 59. y l f When in its uppermost normal position .the switch blade 12 electrically connects the contacts 14 and 15, the blade 13 connecting contacts 16 and'17. Vhen'pressed downward. against theaction of the spring 31 the switch blade ,12 makes electrical connection between the contacs 18 and 19, whereas the blade v13 electriclly connects the contacts 2O and 21.

vlilectricelly.i the connections made by the switch blade when in its normal up position,

the contacts 14 and 15 being bridged, conneet terminal 67 with both terminals 51 and 69, the former through strip 69 and the lat- .member slidable thereon, a resilient connec- *A tion between said switch member and the lactuating member, contacts engaged by said switch member when in one extreme position, contacts .engaged by said switch mem-` ber when in its opposite eXtreme position,

said members having a pair of grooves formed therein, one abovethe other, and a.

spring pressed latch adapted to engage one or the other of said grooves when the switch member is in one or the other of its extreme positions.

2. In an electric switch the combination of a casing, a plunger axially slidable.

through said casing, a thimble slidably mounted on said plunger' and movable into one or the other of two positions, V-shaped switch blades carried by said thimble, contacts positioned in the upper portion ofsaid casing and adapted to engage the outermost legs of said V-shaped switch blades when in one extreme position, two pairs of contacts positioned in the lower portion of said casing each pair being adapted to engage the outer surfaces of the two legs of the V- shaped switch blades when in the other extreme position, a resilient .connection between said thimble and plunger and a latch for holding the said thimble in its last as'- sumed position until the plunger has reached the end of its stroke tion.

3. In an electric switch the combination of a casing, a plunger axially slidable through said casing, a member sli'dably mounted on said plunger and movable into one or the other of two positions, a pair of switch blades carried by saidy member, contacts positioned in the upper portion of said casing and adapted to engage the said blades when in one extreme position, two pairs of contacts positioned in the lower portion of the casing, each pair being adapted to be engaged by one lof the blades when in the other extreme position, a resilient connection between said member and plunger and a latch for holding the said member in its last assumed position until the plunger hasl reached -the end of its stroke in Aeither direction.

In testimony whereof we hereunto set our hands.

VINCENT G. APPLE. WILLIAM M. S. MILLER.

lVitnesses for Vincent G.

E. V. MARTIN, E. KRAUTTER.

Apple in either direc'

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