US 2264980 A
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Description (OCR text may contain errors)
LOCK swITcH Filed Dec. 11, 1939 2 sheets-sheet 1 E. N.r JAcoBl 2,264,980
E. N. JAcoBi 2,264,980
LOCK SWITCH Filed Dec. ll, 1939 2 Sheets-Sheet 2 lthe assembly1 projectv Patented Dec. 2, 1941 Vrowers N.
Jacobi; Milwaukee, Wis., assigner to.
Briggs &. Stratton roruoration,..liiilwaulree,p Wisnaicorpcrationnof De.InwardV 1 Application December 11, 1939; Seri-al No. 308,664
. 5 Claims.. (C
5 t'ally, as. hereinafter. described andK more pard This, invention.. relates.. to. lock.. switches. and refers.l particularly. to, ignition. coil switch locks for useon automobiles..
As. a safeguard, against theft by shunting out the lock controlled ignition switch, it is cus.- tomary to encase the switch and the lock cylinder by which the switch. is actuated. inV a. hardened. metal casing for body This. precludes. defeating the lock in the. man-ller'notedhut. leaves the. switch vulnerable toI unauthorized actuation by removing the lock cylinder. Removablecyleinders areV a necessityY in the-present day. lock equipment of automobiles. but the. cylinder, retaining.V devices. heretofore in useewere ynot appro.- priate for wherein, the: outer.l casing, is` hardened.
' It is, therefore, anobject of. this invention-to provide an improved cylinder` device by which. the cylinder is removably secured. in position.
A further-object of; this invention is td provide a strong cylinder retaining.;` means.- which; is Yso designed that removal of; thev cylinder is impossib-le in its locked position of rotation.
More specifically, it is. aruobieet off tion. toprovide newand. improved means.' for' seicuisine` the cylinderV in place `which. comprises a pin .or1 other abutrne t: x:emcvably earriedjby the body `of the lock. and engaeine'in. an :arcuate groove. in the cyiinden. and wherein. interchange casinal or bedrei theleok ying` means on the: pin orabutment, and. the cyl;- inder preclude removal of the pin when the cyl-.- index2-is: in its lockedpcsition of rotation.
In switch combinations of this type;l thevout.- side dimensions: of that portion of: the housing which encases the. switch. cannot be; very 'easily reduced to the. diameteroi theahousng- Palit which contains theloclr` cylinder.. Space. refillkitments, however,` often demand that no; part of below the periphery of.' th` io'repartof the body mounted. This requires theswitch to. be mountedf` eccentrically wth respect. to. thev axis. of the cylinder which introduces diicultiesfinthe drtve transmission from the cylinder'to the rotaryfcorrtaeter of the switch.
The present invention, therefore, has, an;- other of its objects, the provision of `a new and improved manner of drivingly connecting the cylinder and contactor in constructions of this t' e.
JIlVith the above and other objects in view, which will appear as the description proceeds, this invention resides in the novel construction,V combination and arrangement of parts substanlock.` switch combinations. of this type ...l
in which the cylinder rs r.. ro-ese).
ticularly deued'by the. appended; @aimait being understood that such changesin the precise ernbodiment ofthe herein disclosed invention may be. mariees come within thescope. oi the` claims. l The accompanying drawings illustrate. lone complete. example of the` physlcal'jembodrnent 'Ofi the invention constructed according, to,.th.e best. xno'cle so, farv devised for. the. practical applications.. of the principles thereof.- and inv which: Figure.. 1 is a view. substantially longitudinal section through alock switch constructed in ac.- .eordeneejwith invention; Eigure 2 is a, cnossssectional. view takenthrough Figure; on the. Plane of. theline Zfz;
Eigure. is a. crosssectional, viewI taken through Figure 1 on. the. plane oi the line. 3er-3;. Figure 4.. issa. view, similar toFiaure, 3I but. illus- .tlratinegr the partsturned to another-switch. posi! Figure 5 is a, perspectiyeview of `the lock body or easing); Y f Figure.- d isar Perspective view of the lool: cylinder; and. Y Figure "1.A 'p aperspective View of, the. .Swtehpel vse: and: illustrati-ne: nat-ticularlrr the manner in which the rotary contacter is driven. y
Reierrinenew particularly Ytothe.. aeeomnany- `ias drawings. .bien like; numerals indicate like nar-ts..` the, numeral.. '.i designates outer switch. which formed of hardened metal, preferably steel. andv a .fbore 6; in ts'iront; end ier" the reception; of; a lock; cylinder l and an; enlargedv circular cavity 'or bore- 8: in,y its rear.` end` to. receive the.: switch designated generally bythe numeral. 9. rvThese ttwo bores-aref offset. axially so that. at one side of the casina'the outer walrforms; substantially a, straightline.
suitable means, such as an annular flange Mt and; a nut Il threaded' on the outer end ofthe "casing, is provided forsecuring: the casingt'o a vmountingpanel I- 2.-
ljhe 'lockcylinder isi of customary typehaving` t-'unrblers*t3V which project a lockingbar [4 radial-ly'from the cylinderV to engage ina slot I5 formed in aimer. O1' .bushing l6 securedinthe here .6.. 'llhej tumblers. are,v retractable 'unanime insertion of a proper key I1, whereupon the locking bar is retracted out of the groove or slot to free the cylinder for rotation.
The cylinder is removably secured in position by a locking pin I8 consisting of an outer screw 55 portion threaded into a tapped hole in the side wall of the body, and an inner headed end I9. This headed inner end projects into an arcuate groove 20 in the adjacent portion of the cylinder and thereby secures the cylinder against withdrawal.
To guard against unauthorized removal of the cylinder, a ledge 2| extends from each side wall of the arcuate groove 20 at that portion of the cylinder which aligns with the retaining pin when the cylinder is in its locked position of rotation. These ledges 2l thus engage under the head of the pin IS and prevent removal thereof when the cylinder is in its locked position.
Rotation of the cylinder in either direction from its locked position which,'of course, necessitates the use of the proper key permits removal of the retaining pin and consequently withdrawal of the cylinder.
The switch 9 is of conventional design having a base 22 of insulating material upon which the stationary contacts and terminals are mounted. One of these terminals has an armored conductor 23 connected thereto and leading to the ignition coil.
The contacts mounted on the base 22 are selectively electrically bridged by a contactor 25 rotatably mounted on a stud 26 secured to the base. This stud is coaxial with the switch; and inasmuch as the switch is mounted in the bore or cavity 8 of the housing,4it follows that the rotary contactor is constrained to rotation about an axis offset with respect to that of the lock cylinder.
'I'he driving connection from the lock cylinder to the rotary contacter comprises an insulated drlver.2l also mounted on the stud 26 and provided with driving ears 28 which engage between suitable abutments 29 on the contacter,
A compression spring 30 coniined between the insulated driver and the contactor provides contact pressure and holds the parts against rattling.
Engaged over the outer end of the driver 21 is a cup-shaped metal stamping 3l. Two diametrically opposed tangs or lugs 32 and 33 extended from the edge of the stamping engage in notches formed in opposite sides of the driver so that the stamping is nonrotatably connected therewith. Y
The end or bottom wallv34 of the cup-shaped stamping is spaced from the wall of the driver and, as clearly shown in Figure l, is directly adjacent to the inner end of the lock cylinder. An aperture 35 in this wall ofthe stamping is so shaped as to provide internal gear teeth 36. These teeth are radial to the axis of the contactor and extend to substantially the periphery of the cup-shaped stamping.
A projection 31 on the inner end of the lock cylinder enters this aperture and is shaped to be readily apparent that this invention provides a substantial improvement in lock switch combinations.
What I claim as my invention is:
1. In a cylinder lock: a body having a bore; a cylinder rotatably mounted therein; means for removably securing the cylinder in the bore of the body comprising, an arcuate groove in the cylinder, and a headed pin removably secured in the body and entering the groove to prevent re- `moval of the cylinder; and a ledge on the cylinprovide a plurality of external gear teeth 38 radial to the axis of the cylinder and having a pitch diameter less than that of the internal gear teeth so that the teeth mesh when the parts are properly assembled. A simple eiiicient driving connection is thus established between the cylin- .y
der and the rotary contacter, vnotwithstanding the axially oiset relationship between these elements.
From the foregoing description taken in connection with the accompanying drawings, it will kder projecting into the groove and engageable under the head of the pin in the locked position of rotation of the cylinder to prevent withdrawal of the pin from the body as long as the cylinder remains in its locked position of rotation.
2. In a cylinder lock: a bored body; a lock cylinder rotatable in the bore; a portion of said cylinder having an arcuate groove formed therein; a headed pin removably carried by the lock body, with its head entering the groove to prevent axial removal of the cylinder from the body; and means on the cylinder projecting into the groove and engageable under the head of the pin in the locked position of the cylinder to prevent removal of the pin.
3. In a cylinder lock: a body having a bore; a cylinder rotatable therein and having a part provided with an arcuate groove; a cylinder retaining pin removably secured in the body and projecting into the arcuate groove; a head on the inner end of said pin inside the groove; and means carried by the cylinder to move with the cylinder throughout its range of rotation and engaging under the head of the pin when the cylinder is in its locked position of rotation to prevent removal of the pin in said locked position of the cylinder.
4. In a cylinder lock: a bored body; alock cylinder removably mounted in the bore oi the body; and means for4 removably securing the cylindergtherein comprising, spaced walls on the cylinder defining an arcuate groove, a retaining pin removably secured in the lockbody with its inner end projecting into the groove to secure the cylinderin place as long' as the pin is in position, and interengaging means on the pin and the cylinder effective in the locked position of the cylinder for preventing removal 'of the pin so that disassembly of the parts necessitates turning the cylinder away from its locked position ol.' rotation.
5. In a cylinder lock: a bored body; a lock cylinder removably mounted in the bore of the body; and means for removably securing the cylinder therein comprising, spaced walls on the cylinder dening an arcuate groove, a retaining pin removably secured in the lock body with its inner end projecting into the groove to secure the cylinder in place as long as the pin is in position, a head on the pin inside the arcuate groove, and an obstructing ledge on the cylinder projecting into the groove and engaging under the head of the pin in the locked position of the cylinder so that diassembly of the parts necessitates turning the cylinder out of its locked position of rotation.
EDWARD N. JACOBI.