US2379440A - Lock device - Google Patents

Description

v July 3, 1945; E. NQJAcoBl 4 LOCK DEVICE 'original Filed April s, 1942 .Edwaramaabz Vltionlisa division.

Edna-@N T- fsinvention: relates -the` locksl .and refers particularly to the cylinder -andtumblerswo'f 4the 'doorrlatch locki'shown in Patent No.:112',318,490,

issued to -Jacobiy Mayy 4', -l"$)4.%,.fand1v its di'- 4visio'nal'copending application,v SerialNo. 437,547,

filed.: April Y3, '1942, .-and issued August. 29,119,411, as Patent-:No.12,357,004, of i which l.thisv applica .t In`lock devices of the-.type hereA under. consideration, as ,Well as in other tumbler locks, it

is desirable thatf `the -1 cylinder: be removable. Various devices ihave been employed invl the past .fortremovably' securing the .cylinder invits.` casing, .butgin ,general l.they all4 embody a ,spring pressed f detenty carried Yeitherl -by the cylinder. or sthe casingy andy extending Vacross ithe. `,juncture therebetween;...to engage4 with an abutment or -shoulder from which the detent must be `freed to permit withdrawal ofthe cylinder. A,- v yIt isalso: the Ipractice .zin tumbler flocks of th character,` described to'retain the individualptum- .blervsprings either by.. individual retainers; or

more ,suitably bymeans of a single retainer fixed j to,v the-cylinder with portions. thereof .disposed over.the'tumblersprings. s e.

.- .4 ',Withaf-:vievv toward minimizing; the number off partsg. the 1 present. invention combines thev functions of retaining the tumbler springs andrerriovablyl holdingl the -cylinder in its casing, this feature being claimed in the aforesaid copending application, Serial No. 437,547.

The specific object of the invention here prebe made as come within the scope of the claims.

The accompanying drawing illustrates one com.. plete example of the physical embodiment of the invention constructed according to the best mode so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a side View of a lock cylinder equipped with tumblers constructed in accordance with this invention;

:Figure 2 is a cross sectional view takenthrough Figurel ontheplane-ofttheyzlineJfZa Figure 3- is-'afperspective viewer-the. c linder per se; I;l z 1; f Figurev 4L isa" *perspectiver 'view of f the4 ,combined tumbler spring and cylinder retainer; and:v u.

1 Refer-ring-l nowlparticularly .tozthe accompanying'k drawing, in" which-like numerals indicatelike parts, the numeral 5 designates a cylinder'wvhich is. lpreferablyw-die c'ast and'has 'anwopenstrans- ,verse :tumbler-cavity 6 z communicating. with a 'longitudinal keyway 1.: The side .wallsfof .the cavity have opposite grooves extendingiacross'ltheir vfullfwidthI-to provide tumbler guideways in; which the4 side edges'ofgthe tumblers.9 areslidably re- CeVBds* if" '.H nl: At one edge of the cavity the cylinder is'formed `1with1 bridges f- IU whichl extend :across .the cavity between the'- tumbler? guiding. groovesB.' These bridges; `togetlfier vwith ia`- similarly located ledge (not shown) on the inner.l orrearlendof :thecavity' provide lands inposition to collide .with t spring rstsl Il 4I on 'the i tumblers to 'limit the? stroke-fof 1 the tumblers Iunder i ac-tion:l of"` their springg l2;

- Ther individual tun'iblers,E as best .shown' in Fig- `rure 15,ar`e stampedffromat band vstock and vhave their medialportionsrecessed or cut out at" one edge to provide a key opening I3. The spring rests I I are projections on'the inner edges of the intermediate tumbler portions, These projections are bent back to overlie the intermediate portions so that the springs engaging the same are adjacent to the` intermediate portions of the tumblers to be guided thereby. Displacement of the springs from the rests Il is prevented by having points on the rests project into the ends of the springs.

Heretoforathe tumbler springs were held in place either by individual retainers or a common 'retainer secured in the cylinder, but in all instances in the past, the tumbler spring retainers were fixed and'generally were staked into the cylinder. t

With the present invention, an entirely new form 0f tumbler spring retainer is employed, and as a result the functions of retaining-the individual tumbler springs andalso removably securing the cylinder in the casing bore are performed by one unit. For this purpose, a novel combination tumbler spring andcylinder retainer indicated generally by the numeral I4 is provided.

As best shown in Figure 4, this retainer I4 consists of a sheet metal stamping having an elonyv k-

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