US1320704A - Electric switch. - Google Patents

Description

1. M. NAUL.

ELECTRIC SWITCH.

APFLlCATlON FILED HAR. l0. I9I6-.

'15320,704. Patena Nov. 4,1919.

UNITED sTATEs PATENT oEEioE. 1

JAMES M. NAUI., ory PLAINEIELD, NEW JERSEY, AS'sIGNoE, BY MESNE ASSIGNMENTS, i

To AMERICAN BoscII MAGNETo CORPORATION, or NEW Yonx, N. Y., A Gourou;

TION OF NEW YORK.

ELECTRIC" SWITCH.

Applcation filed March 10, 1916. Serial No. 83,371.

'To all whom t may (formera:

Be it known that I, JAMES M. NAUL, a citizen ot' the. United States. residingl at and I whose post-office address is 655 EastiSevcnth an oii' position at which sonic of the circuits controlled thereby are interrupted and some are grounded, and also one or more operative positions at which the several circuits are individually or collectively closed, so that grounding or closing a certain circuit necessitates a certain connection for some or all voil: the other circuits. For instance, in the Well known form of combined lighting and ignition switch for automobiles, motor boats and the like, all the light ing circuits must be interrupted to ground the magneto at the otl" position, and if some of the lights are to be left burning the magneto cannot be grounded by the switch. This'ariangenient is unsatisfactory because the operator often wants to leave thc. moving vehicle at rest with some lights burning and yet desires to lock the n'iagneto in 'a ground -ed position to prevent unauthorized operation of the engine. Furthermore. the operator may want to stop the engine b vgrounding the magneto and yet the lights should not be extinguished. l

The switch herein disclosed is adapted to control a plurality of circuits. but it overcomes the disadvantages of the switch hereinbefore referred to by providing a supplementary contact which is engaged in removing thekev from its normal position in order to lock the switch in set position. In

using this switch to control lighting and ignition circuits. the insulated electrode of the mechanical interruptor of the magneto is connected to the supplementary contact and that contact is grounded when the key is being removed, irrespective of the Position i in which the switch is locked. In ,the pretericdorm of Switch for this purpose, the

Specification of Letters Patent Patented NOV. 4, 1919-. i

insulated electrode is also connected to another contact which is grounded when the switch isin the off position, irrespective of the position of the key. Thus the magneto may be short-circuited by turning the switch to o" position as heretofore, and also` the magneto may be short-circuited to prevent unauthorized operation of the. engine by retive of whether lights are burning 'orare eX- olo S65 'A moving the key to lock the switch, irrespectinguished. Furthermore, by bringing aboht the engagement of the supplementary contact during rotation ofthe key to its position of removal, the magneto maybe short-cir cuited merely by turning the key inthe lock.

I prefer to do this because the operator some-f times wants to shut oi the ignition when going along, while at the same time he does not want to extinguish the lights and does not need to remove 4the key.

In the accompanying drawings illustratl ing the preferred form of switch in application, as an example. to lighting and ignition.

circuits, Figure 1 is a front view of the switch in off position, thekey being rei moved; Fig. 2 is a section through thev switch; Fig. 3 is a rear view of the front part of t-he switch; Fig. 4 is a front view of the rear part of the switch; and Figs. and 6 are enlarged detail views showing the position, respectively.

The switch has a cup-shaped casing 4.- of metal with a ange 5 adapted to be screwed to a Support. The base block 6 of the insulating material is fastened to the casing by screwsv and forms therewith an incloscd supplementary switch in closed and openlcavity yfor the reception of the operating parts ot the switch, as will appear hereinafter.l The. operating handle 7 carries a spindle S ournaled centrally in the casing as shown and riveted to the lock plate 9, these parts being arranged to turn between the limits determined by the terminal faces ofthe boss 10. Six circuit contacts 11,11 and 11 of copper in the form of slotted studs are held rigidly in the base block and are engaged by binding post screws to which circuit wires may be. attached at the back. The central hollow stud i2 of copper has a connecting screw 13. andprovidcs at its inner end a liournal on which' the switch arm can turn. The end of the journalis forced 'the parts.

hack against the copper washer lo after the switch arm is in place on the journal and Vforms a good electrical connection between The yswitch arm is made up of tw fo copper segments 16 spaced apart hy the metal washer 17 and having opposite flanges of di'erentcxtent. lllhe ringr 18 olf insulating material is riveted to the switch arm and is provided with two holes 19 into which project two pins 2() from 'the rotatable lock plate 9. The slots in the two studs 11 and 11 are higher than those in the other studs 11, and the two segments 1G are spaced apart to such extent that the studs 11. and 11 are not engaged whereas the. studs 11k are engaged when the switch arm is moved past them upon turning the handle 7. A bent copper strip 21 carried on the pins 20 and pressed against the ring 18 by an arched spring 22 passes over theA studs 11, hut engages the top of the stud 11j which -is 4longer than the studs 11, to ground ,it on the metal part of the casing when the switch .is turned to ofi position.

The lockingmechanism comprises anemher 2? held in place in a cavity of the easing 4. hy the pin Q4 which projects from `the casing" almost hut not quite to the center ol rotation of the memlier 23, and a key'I which can be inserted in place and witlr drawn therefrom. onlyy inthat \position wherein a eripheral part-2dA1 ofthe member sets in a peripheral vrecess oiI the lock plate 9. ln this position the lock plate cannot he turned from ils set position, 'irrespective oit what position that may he, lout when 'the peripheral part 23a is turned hy the key 25 somewhatless than 1800, in which position thekey can not. be removed. the, lock plate may' he turned without interference h v the peripheral part 25 a of the member 23, since, that, part is then out oit registry with the lock plate. A copper strip 2l; is mounted directly underneath the men'lher and is so shaped that when the peripheral part r (.liseng'ag'ed from the lock plate7 the spring 27 forces the strip 2G out of engagement with ,the stud 11', and when the meml'ier 23 is turned soithat the peripheral part thereof engages the lock plate, the strip is forced by the upper` face 231 of the memher 23 into engagement with the stud 11 to `ground tha t stud on thelcasing'. The two studs 11 and 11 are eleetritallly connected by a wire 28 'fand the strip 2G i'orms 1n "ellect a switch blade guided in its movement to and from the stud 11"by the pin 29.

The switch herein shown has four positions designated on the front of its casingy hy 0, 1, 2,v 3, the position 0 being the .olif position `in whiththe'strip 21 engages thestudili/ to lgrot nd it and in whielr'tl'ie segments 16 aredisengaged from all thestiids. 'In the osltion marked '1, as shown m Figs. Q and the wide flanges of the segments 16 engage` one of the studs 1,1 to connect it to the screw 15S. In the position marked 2, the two studs 11 on one side are engaged by the wider flangesy ol the segments, and one stud 11 on theother side is engagefd hy the narrow segments. ln the position marked 3, the same two studs 11 are engaged hy the wider flange, and the other stud 11 on the other side is engaged bythe narrow flanges. The stud 11H is intended to be electrically eonnected to the insulated electrode oi the mechanical interruptor oi" the magneto, so that when the switch is turned to its oli position, or when the key Q5 is turned to the position in which it may he removed from the keyhole and in which the switch is locked against mowmenl, the magneto is short-cireluted and. discontinuos the generation ofI ignition voltages. The spring pressed hall 50 snaps into a recess of the lock plate 9 at each one o'l' its four positions tolightly hold the switch in thai position.

lt is apparent that the idea. herein dis closed oil engaging a supplementary contact or closing a supplementary switch in removing the key to lock the switch in set position ma)Y he applied lo various forms of switches ior controlling' various kinds ofeircui'ts.

l Vclaim is: y A y 1, In an electric switch, a plurality 01E circuit contacts. a switch arm engageahle successively with someo'l1 said circuit. con* tacta a supplei'nmitaryI contact electrically connected to :mother of said circuit contacts, a grounded meinher carried byv said switch arm and movable into engagement with said supplenrental-yiContact at one position oi the switch arrn, and mechanism. constructed and arranged to lock said switch arm in any of its successive` positions and to simultaneously ground said supplementary contact. A/

2. ln an electric switch, a plurality of circuit conta a switch arm engageahle successively with some of said circuit contacts.,l a supplementary contact electrically connected to another of said circuit confacts` a `@grounded member carried by said switch arm and n'iovahle into engagement with said supplmnentary contact at one position )of the switch armand mechanism ineludinp,l a removable key, which upon 'heiner turned to the position in which it may be removed, locks said switch arm in its successive positions and simultaneously grounds said supplementary contact.

3. ln an. electric switch, a plurality of circuit contacts` a. switch-arm Aengageable 'successively with some of said, contacts, a y ffroumiled member on the switcharm, an adl'lfaving thus deseriherhmy invention, what iie any of I look seid switch-arm in any its Successive positions and io Sinndt-neouely ground Said Second edditionzrl Contact.

4. In an electric switch, o. plnraiity of circuitcontente, a switch erm engageabie with said contacts in Suc-Cession, 2L supplement-ary Switch, and looking ineeimnisn'i inouding e plaie rotatable with tbe switch arm, a removable key and e ke r-ope ated membel` which, upon being turned to e position in which the key may be. reinoved, looks seid plato against movemen ai; any of its successive positione and also closes said supplementary switch.

5. in an eleotrieswitcb, e rotutnbie switch Shaft adapted to be to various positions, a. piee fixed on said switch shaft., e supplementary switch, und :i keyopera" memberbaving'tvf'o actuating parte .vbii'n, in 'tbe position of Jabe member wherein release of the key is pennitted, lock seid plete in. :my of its' set positions end close Said supple menery switch, and which, intbe position o1?. the niember wherein release oi? the key is precluded3 release said plete und open seid supplementary switch. f

6. An electric switch comprising the combination of a plurality of contacts, a ro tambie switch-:mn adapted to be moved into and out of engagement with said contacts, a. supplen'xentery Contact, a grounded member carried by the Switch-erm and engaging tbe supplementary Contact in one position of the switch-arm, a second switch-arm, :L Contact with which the Second switch-arm cooperates7 e key-operated rotatable locking device for holding die irst switcherm against movement, means for operating the second switch arm by rota-tion of the looking device to looking position, and means for sustaining e key in position for operating seid rotatable locking device and for prec-hiding removal of ythe key except when the locking device is in looking position l In teseimony whereof I eiiix my signature.

JAMES M. NL.

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