US1882794A - Lock - Google Patents

Description

G.- D. FULL Oct. .18, 1932.

LOCK

Original Filed Sept. 1.4, 1925 2 Sheets-Sheet l G. D. FULL Oct. 18, 1932.

LOCK

Original Filed Sept. 14, 1925 2 Sheets-Sheet 2 elfjzzi: 2Q

Patented Oct. 18, .1932

UNITED GEORGE 1). FULL,

ATE flames;

or WINNETKA, ILLINOIS, "assienon T DUDLEY rocx conrom'rron, or CHICAGO, nmnorsnconronnrxoiw or rumors, V

Loan

Application filed September 14 1925, Serial no; 56,273. BenewedhApril so, 1931.

Fig. lillustratesth shackle moved to un- My invention relates to locks and more particularly to permutation, or 'keyless locks whereby a series of tumblers having a predetermined setting are adapted "for. manual operation to release the lockingshackle'from closed position, the invention relating to. cer,' tain peculiarities of the construction, novel arrangement and combinatio'nof the various parts thereof as will behereinafter more ful 2G ly set forth and specifically claimed. I

The principal object 'of'my invention is toprovide a lock of the abovementioned gen eral character, whereby the usual number of tumblers or operating elements are fitted l into alock casing and by means of the usual spacers and pins are adapted to be brought into a predetermined positionby a manually operable dial on the exteriorofthe casing, to the end that a proper registration of the tumbler slots will permit a lockingpawl; to

be withdrawn from "engagement. with the shackle, said locking pawl being of a novel form to provide added strength to the'lock when engaging theshac'kle.

3, Another object of myinventionis to'provide the lock of such construction that aplu rality of tumblers may be associatedivin a lock casing with a master tumbler, which is grooved or serratedab'outits periphery, so

.9 as to holdthe lockingpawl out of contact I with the other tumblers, therebypreventing an unauthorized person from ascertaining the combination by feeling each timea tumbler slotisbrought into proper registration.- A further objectis to providaa structure which is simple and inexpensive in construc tion, strong, durable and effective in retaining its shackle securely held in, locked position. .i' V

In the accompanying drawings illustrate a convenient embodiment of my in,- vention': Figure 1 is a front elevation of apermutation lock embodying my invention; Fig. 2 is a similar view, but :with the cover and master tumbler removed to illustrate the manner in which thelocking pawl engages,

the shackle in reinforced relation;- l Fig. 8 is a. similar view illustrating the 5 locking pawl released from theshackle,

its open position. is

anism, to illustrate the relative relationof these parts; and Fig. 6 is a section taken on line 6 f; Fig. 2. i

lnthe drawingswherein I have illustrated a preferred embodiment of my invention, the lock comprises the usual lock casing 2 having a pair of openings near the upper end to receive the locking jshackle Opening 4 may be seen in Fig. 5 and it isthrough thisopeningftliat the free end.5 of shackleS m ay be inserted and held locked withincasing 2b means ofalocking pawl 6. c U

'lheopposite end of shackle 3 is. inserted throu h an opening'7. At thisendof sliaclgle 3, a co lar 8 is fixedtoserve as astopso as to will be app arentthat when the. free end 5. of shackle 3 is, released by. locking. pawl. 6Qthis shack-1e may be pulled; outwardly a limited distance'from casing 2 so asto'free theend -fi and fallow the shackle tov freely. swing about the other end thereof, its entire. displacement from the lock, casing being preventedfbyrol- 13. 181 abutting against the apertured lug .9.

A: tumbler mechanismlcontaining the usual. number oftumblers and spacers maybe providedin the presentinstance as thenneans I for releasing the lockingpawl 6 from'engag'ef Inentwith the shackle 3. Asthepresent lock is of the permutation or..keyles s.ty e, I.contemplate providing a dial .12 as the ront face for the lockcasing 2. A knobil3 hayingr a;

' pointer 14. fixed thereto fniay. be rotatably mounted inthecenter of dial12 The inner end of knob l3v may be apertured as indicated; at 15 'soas to fit over thejreeendof the. pin 16. fiiled-intheplate 10. This pin may be, riveted, as indicated at 17, centrally in; plate.

10 and. in axial alignment with the. knob Pin 16 serves to carry a plurality of tumblers 20, as indicated in Fig. 5, which are adapted to be spaced by a plurality of spacing mem bers 21, these members having a portion 22 provided with openings 23 permitting the spacing members 21 to be carried upon a pair of pins 24-. These pins 24 are also riveted in the holding plate 10. Tumblers are'centrally apertured at 2% to permit the pin 16 to pass centrally therethroughand are each furnished with a pin 25. These pins 25 function to interlock and cause the tumblers to bring peripheral slots 26 into register with each other. It .will be observed in Fig. 5 that a master or top tumbler 27 is also provided, this latter tumbler being riveted or. fixed to the inner end of knob 13, that is to say, the master tumbler is adapted to rotate in fixed relation with theknob 13 so'that upon proper manipulation of the knob'the master tumbler will first interlock with the adjacent tumbler and then through this adjacent tumbler with that an acutely formed slot 30 is cut into thefree end '5 of shackle 3 and in this slot a transverse engaging portion or shoulder 31 is adapted to engage. It will be observed that the slot 30 is extended downwardly at an acute angle with respect to a pulling force attempting to release the free end '5 of shackle 3. Shoulder '31 is formed at a similar angle. Locking pawl 6 is pivoted at 32in the easing and is adapted to have one of its edges engaged against the free end 5 of shackle 3.

Shoulder'31 is so formed that it will abut againstthe innersurface of the lock casing when engaging in slot 30. This provides a strong interlocking engagement. between the pawl, and shackle which is of particular advantage at a time when an attempt is made to force the shackle loose from the casing. The edge 33 of locking pawl 6 will at the same time bind against theloweried'ge of the free end of shackle 3 while the shoulder 31 engages in slot 30 at an acute angle in a dipulling rection opposite to that which the force is being exerted. V

In'order to guard against a person determining when the slots 26 and 28 all come into alignment with each other, thereby feeling out the combination, thisusually being accomplished by pressing the shackle downwardly so as to bring the locking pawls en gaging portion 35 into peripheral contact teeth. The serrations orteeth in the master tumbler are produced by forming the periphery thereof with a series of spaced false notches indicated at 27, whose bottoms are defined by a radius greater than the radius of the other tumblers. Thus an attempt to feel out the combination by'ascertaining when the pawl-receiving notches, '26 and 28, align is precluded, since these false notches, 27, which themselves are adapted to receive the engaging edge, 35, of the locking pawl when the shackle is depressed in the manner mentioned, willi'always hold the pawl out of contactual engagement with the periphery of the other tumbler disks, 20. A leaf spring 37, as illustrated in Fig. 5, normally urges the shackle upwardly by engaging the end which passes through the apertured lug 9. This spring tends to hold the slot 36 in register with the engaging shoulder 31 of locking pawl6 when the free end 5 of shackle 3 is insertediin opening 4 of lock casing 2. f It will be observed "that the inclined walls of slot 28 will cam the locking pawl upwardly out of. engagement with the slots 26 when it is desired to again move the locking pawl 6 into engagement with the slot 30 of shackle 3. On the other hand, the locking pawl 6 is moved downwardly into engagement with these slots 26 and 28 by pressing the shackle 23 downwardly when the proper combination of the tumblers has been found. The'dial 12' may be provided with anynumber of divisions, say, from zero to 40, inclusive, while thetumblers may be soarranged with'reference to their pins 25 and slots 26 that any desired setting wil. serve to operate the lock. This is common r; the construction of permutation locks and I deem it unnecessary to give a further e2:- planation thereof. Y

Other embodiments and modifications of the details shown herein may be had without departing from the spirit and scope of my invention.

*1 claim:

1 1. In a permutation lock, a casing, locking means including a part movably mounted in the casing, tumbler mechanismfor control.-

ling the movement of said means including a series of. superimposed tumbler disks each having a peripheral notch adapted to be registered with said movable part to permit movement thereof in approximately radial direction, and an exteriorly accessible member adapted for ad usting said tumbler disks able part with any one of its said shoulders.

2. In a permutation lock',a casing, locking means including a part movably mounted in the casing, tumbler mechanism for controlling the movement of said means including a series of super-imposed tumbler disks each having a peripheral notch adapted to be registered with said movable part to permit movement thereof'in approximately radial direction relative to the disks, and an exteriorly accessible member adapted for adjusting said tumbler disks in registered relation; one of said tumbler disksbeing larger in diameter than the others, and having its periphery formed with a plurality of circumferentially spaced false notches of less depth than said first mentioned notches, the bottoms of said false notches being located at a distance from the center of said tumbler greater than the radius of the other tumblers, whereby contact of said movable part with the other tumblers is prevented when said part is entered in one of the false notches.

3. In a permutation look, a casing, locking means including a part movably mounted in the casing, tumbler mechanism for controlling the movement of said means including a series of super-imposed tumbler disks comprising a master tumbler and an exteriorly accessible member connected thereto for rotating it, and a lost motion connection between each tumbler and the next of the series, whereby rotation may be imparted from the master tumbler to the other disks for adjust ing them in registered relation; each of said tumbler disks having a peripheral notch adapted to be registered with said part to permit entry of the latter therein, and said master tumbler having its entire periphery except the aforesaid notch lying outwardly beyond the peripheries of said other tumblers, whereby said master tumbler serves to block inward movement of the movable part to prevent contact thereof with the other tumblers during their adjustment by rotation of the master tumbler.

4. In the combination defined in claim 3, said master tumbler having its periphery provided with a plurality of spaced false notches of less depth than its first mentioned notch, the bottoms of said false notches beinglocated at a distance from the center of said tumbler greater than the radius of the other tumblers, whereby contact of said movable part with the other tumblers is prevented when said part, is entered in one of the false notches. V

GEORGE D. FULL.

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