US1556606A

US1556606A - Lock

Info

Publication number: US1556606A
Application number: US151011A
Authority: US
Inventors: Edward N Jacobi; Francis W Lawrence
Original assignee: Briggs and Stratton Corp
Current assignee: Briggs and Stratton Corp
Priority date: 1917-02-26
Filing date: 1917-02-26
Publication date: 1925-10-13
Anticipated expiration: 1942-10-13

Description

Oct. 13 1925 LOCK mi rwmf Patented Oct. 13, 1925.

UNITED STATES EDWARD N. .'rACoBI, OF MILWAUKEE, WISCONSIN, AND FRANCIS W. LAWRENCE, or DETROIT, MICHIGAN, AssIoNoRs, BY MEsNEsAssIGNMENTs, To ERIoes a STRAT- TON CORPORATION, or iviILWAUxEE, WISCONSIN, A CORPORATION OF DELAWARE.

LOCK.i

To all whom t may concern:

Be it known that we, EDWARD N. JAooBI and FRANCIS W. LAWRENCE,I citizens of the United States, and residents of Milwaukee, Milwaukee County, Wisconsin, and Detroit,

Vayne County, Michigan, have invented new and useful Improvements in Locks, of which vthe following is a description, reference being had to the l0 accompanying drawings, which are a part of this specification. 6

This invention relates to locks and has for its object to provide a lock of the laminated tumbler type with means for preventing the loss of the tumbler blades when the-lock barrel is removed from the case. With locks of this type the tumblers7 originally alike, are ground to lie flush with the ysurface of the lock barrel while the key is in place therein so that each tumbler blade differs from the others in the yposition of its key opening and no two tumbler blades are exactly alike. It is then of utmost importance that the tumblert blades be retained in their original relative positions,I for if two tumbler blades are transposed or if one tumbler blade is changed end for endit will project at one end or the other beyond the surface of the lock barreland into the locking groove of the lock case to prevent the turning of the lock barrel by lmeans of the key and thelock will, therefore, be rendered inoperative. As there are a number ofthese tumbler blades loosely fitting within a transverse opening of the lock barrel it frequently occurs that y in handling the lock barrel with the key removed, as in assembling lock switches `and other devices of which vthe lock forms a part, the tumbler blades will slide out of the lock barrel and become scattered so that it is practically impossible to reassemble' them in the original order, requiring a newset of tumbler blades to be fitted to the lock barrel. The present invention provides a guard engaging each of the tumbler blades in such a` manner as to prevent their removal from the lock barrel when the key is removed and still not interfering with their sliding nofements for the proper operation of the With the above' and other objects in view the invention consists in the construction and relative arrangement of certain parts respectively, t

'thereofon the plane of lA Corrugated key at one end or the Application filed February 26, 191'?.A Serial No. 151,011.

hereinafter particularly described and pointed out in the claims. i

In the accompanying drawings are shown various exemplifying structures embodying the invention 4but it lis to be understood that the invention is capable of embodiment indifi'ereiit forms. 4 Referring to the accompanying drawings 1n which like characters of reference indicate like parts in different viewsz Fig. 1 is a central sectional View of a lock construction embodying the present inven` tion, the key being shown therein holding the tumbler. blades in the unlocking position Hush with the surface of the lock barrel and permitting the lock barrel to be turned by means of the key;

Fig. 2 is a rear end view of the lock barrel with the key in place;l

Fig 3 is a longitudinal sectional view of the lock barrel with the key removed and showing the tumbler blades retained in the parrel by means of the guard of this invenion;

Fig. 4 is a transverse sectional view thereof on the plane of line 4.-4 of Fig. 3;

Fig. 5 is a longitudinal sectional View on a Vplane distantfrom the center of a lock barrel showing `a modified form of' tumbler retaining means;

Fig. 6 is a transverse sectional view thereof on the plane of li'ne 6-6 of Fig. 5;

Fig. 7 is a view similar to Fig. 5 of another modification;

Fig. 8 is a transverse sectional view line 8-8'; l

l' Fig. 9 is a view similar to Fig. 5 of a further modication.; and,

Fig. 10 is a transverse sectional view thereof on the plane of line 10-10.

Inthese drawings 15 indicates a lock case having a bore in which a shouldered cylindrical lock barrel 16 is revolubly mounted. 17 slidably fits within a correspondingly shaped key slot 18 through the lock barrel and its toothed or serrated edges fitr against'the opposite end walls of rectangular key openings 19 in a series of sheet metal tumbler blades 20 which form laminated tumbler means slidably positioned within a transverse tumbler opening 21 yin the lock barrel and Y dapted to project other into Opposite grooves 22 in the lock barrel when the key is removed, thus rendering the lock barrel ,the lock barrel or it may be otherwise secured in place. When the key is removed `from the lock barrel while the lock barrel is'out of the case the tumbler blades are incapable of being'lost as they are held in place by the guard pin 23. Being loose they may fall, as shown in Fig. 3,' so as to reston the guard pin, though they cannot be entirely removed and are thus kept in place and their proper order is preserved without necessitating great care on the art of the person handling the lock tum ler with the key removed. The presence of the guard pin does lnot interfere with the normal operation of the lock as the tumbler blades may freel move lengthwise the full distance require to respond to the cam action of the serrated edge of the key. The

.i pin is furthermore positioned as shown in Fig. 2 where it does not interfere with the introduction of the key.

In the modification shown in'Figs. 5 and 6, each tumbler'blade when punched is provided. with an elongated notch 24 at one side thereof into which a guard rib 25 projects, said guard rib consisting ofa metal strip inserted in a slot in the side of the lock barrel 16 and projecting into the opening 21 thereof a Sufficient distance to engage the shoulders at the ends of the notches 20 and prevent the removal of the tumbler blade. The guard rib 25 may have a forced fit in the slot or may be held in place in any desirable manner.

In the modification shown in Figs. 7 and 8 the tumbler blades are stamped with a projecting lug 26 at one side to enter the groove 2 formed in the sidewall of the opening 21, the lock barrel 16 having its rear end portion made separate therefrom and attached to it in any desirable manner as by means of screws 28, in order thatthe tumbler blades may be placed therein.

In the modification shown in Figs. 9 and 10, the tumbler blades 20 are stamped with projecting lu s 29 at each vend of one side thereof and t e opening 21 of the lock barrel 16 is formed with an inwardly projecting rib 30 to be engaged by said lugs. In order to assemble the tumbler blades in this form of the invention a slot 31 the width of the opening 21 forms a continuation at one end of said opening and passes through theA rib 30 and a suiiicient distance beyond it to permit the tumbler blades 2O to be entered therethrough one by one until engaging the lug 29 with the guard rib 30, las seen in dotted lines in Fig, 9. When each tumbler blade is inserted in the slot 31 untilits lower lug 29 is below the guard rib 30 it may be moved into the opening 21, thus engaging the guard rib 3() between its -lugs 29. The tumbler blades may be threaded in place one by one and when the complete laminated tumbler block is made up they fit sufiiciently close within the opening 21 to make it iml probable that'they should be lost by finding their way out through the slot 31.

By means of this invention a great saving 1n time in assembling the lock structure is effected without materially adding to the cost. The lock barrel may be handled without the necessity for care to prevent the tumblers sliding out and if it is accidentally dropped it does not necessitate the 'refittingA with a new Set of tumbler blades as has been j necessary heretofore.

What we claim as new and desire to secure by Letters Patent is:

1. A lock, comprising a rotary lock barrel having a longitudinal key opening and of sliding longitudinally therethrough for removal and each provided with an opening pierced by the key and means for preventing the loss of the tumbler blades from the lock barrel when the key is removed comprising a rib in the lock barrel projecting into the tumbler opening, said tumbler blades being provided with notches in the side thereof to receive the projecting edge of said rib without interfering with the key-p-roduced movements of the tumbler blades.

2. A lock, comprising a rotary lock barrel having a longitudinal key opening and a transverse tumbler opening, a key fitting in the key opening and crossing the tumbler opening, sheet metal tumbler blades slidably fittingwithin the tumbler opening and each having an opening pierced bythe key, a

guard rib projecting from the side'- wall of the tumbler opening, and lugs projecting from one side of each of the tumbler blades for engaging the guard rib, there being a slot at one end of the tumbler opening form-l I tures as of the 19th day of February, 1917.

EDWARD N. JACOBI. FRANCIS W4 LAWRENCE.