US936863A

US936863A - Padlock.

Info

Publication number: US936863A
Authority: US
Inventors: Lawrence A E Corley Byrne
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-04-19
Filing date: 1909-04-19
Publication date: 1909-10-12
Anticipated expiration: 1926-10-12

Description

L; A. E. c; BYRNE.

PADLOGK. #PPLIOATION FILED APR. 19, 1909.

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' "PADLOGK;

Specification of Letters-Patent.

Patented Oct. 12, 1909.

Application filed April. 19, 1909. 'SeriaIZNo. 490,923.

comprising a casing, a rotatable shacklemounted to project partly from the casing, a sl dable-member, which in a predetermined position holds'the shackle against movement,

and key-operable tumblerlevers controlling the slidable member. 7

The object of the invention is to provide a simple, inexpensive and durable padlock which is inexpensive to manufacture and easy of operation, and which is so c011 structe'd that it is diflicultto force, the lock orto pick the same."

The invention consists in the construetion and combination of parts to be more fully set forth hereinafter and-particularly set forth in the claims.

Reference is to be had to the accompanying drawings formmg. apart of this specification, 1n whlch similar characters of reference indicate corresponding parts in all the 1 views, and in which- Figure 1 is a front elevation of an embodif ment of my invention, the front of the casing being removed :a'ndrthe padlock being shown in the openposition; Fig. 2is a similar view, thelpadlock being shown in the locked. or closed? position; Fig.13is] a cross section on the line 3+3 of 2.; andFig. let I is a frontelevation of the device showingthe 1 front of the casing, the shackle and the tumbler levers removed.

Referring to the drawings a is the shackle whichis circular in configuration and at a portion of its circumference is formed with a gap as shown, the interval between the free ends being suflicient to permit of the shackle being passed over objects it is desired to secure. The. endsb, 0, ofthe shackle a are formed with notches cl, e,-adapt e d when the shackle is in the closed position to receive and to co-act with extensions f, 9, formed upon a sliding plate it, whereby the shackle is maintained against movement and the padlock is kept locked. In order that the extent of its movement may be limited the shackle a is provided with a fixed pin or lug 70 adapted to be traveled in a groove Z in the internal surface of the casing of the padlock.

The sliding plate It is adapted to be moved into and out of engagement with the free ends 5, c, of the shackle a in a direction longitudinally of the padlock by means of the engagement therewith of one or more wards of a key and said plate is provided with slots m, n, with which pins 0, p, rigidly attached'to the padlock casing engage and thus prevent tilting or rocking of said sliding plate It relatively to the padlock casing. Anydesired number of tumbler levers, g may be providedin' accordance with requirements and the keyhole is provided with an internalscreen-r thereby preventing the insertion for. fraudulent purposes of any instrument into the padlock.

The tumbler levers have cutaway partsg and 9 connected. .by. partitions having p es t ii'ninedpOsitiohs of all the levers are adapted openings. therethrough, which in to register, to permit the movement therevthrough of an arm h of the sliding plate It so thatthe latterhcan be operated by the keyhused in connection :with the lock. The V tumbler leversare: controlled by a suitable springniembert. The partitions g of the various levers have the openingsthere through ;at differentpoints so thatxthe tumbler levers :do not bodily register whenthe openings through the. partitions thereof register. It will be understood that the wards of thekey. are so formed that they properly position. the levers .to cause the openings in the partitions: to register so that theQ-move- :ment of the keynot. only adjusts thetumbler levers, but. at the same time moves the slidlngplate intoor out of'engagement with the shackleLQ. The normal position of the parts is such that thetwo free ends 6, c, of the shackle a are engagedby correspondingly formed recesses and the extensions 7, g, on the upper end of the slidin g'plateh, which is therefore'in its uppermostnposition When it is desired to unlock or open the. padlock the key isinserted and turned so as to lower the sliding plate h from engagement with the free ends I), c, of the shackle w. The shackle a is then given a movement so as to bring the two free ends I), 0, thereof out of padlock casing and into a position to permit the space or gap in the shackle to be passed over whatever object it may be desired to secure. To close the padlock the shackle a is moved back to its initial position with its free ends Z), 0, within the padlock casing and the key is turned so as to cause the sliding plate It to be moved upwardly back into engagement with said free ends 6, 0. The padlock casing is preferably formed of a metal casting having a cover plate brazed or otherwise suitably secured thereto. It will thus be seen thatsince the shackle curves inside the lock enormous resistance is ofiered to any pressure applied on account not only of said curvature but also owing to the body of the lock being cast in one solid piece with the exception of the front plate. It would be necessary to break away a large portion of the body or casing before the shackle when once in the locked position, could be separated by force from the body of the padlock.

The front plate of the lock is preferably brazed in and is strengthened with two lugs or projections which are riveted in position at the top and bottom of the lock respectively through corresponding apertures in the back plate. If a crow bar or other instrument be inserted in the shackle of a lock constructed as described withthe view of forcing it open the reslstance would be increased lnasmuch as. the point of the crow bar would tend to press back the mass of metal on the top of the lock that must of necessity be torn away before the shackle could be released from the body. By the provision of a block adapted to slide longitudinally of the padlock and to engage the shackle a very strong and secure means of fastening is obtained. The number of tumbler levers and the position of each can of course be varied so that no two locks are alike.

, Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed I declare thatwhat I claim is 1. A padlock, comprising a casing, a rotatable circular shackle having a gap, and a key operated slidable locking member for the shackle, said member having means for entering the gap of the shackle and engaging the shackle at each side of the said gap.

2. A padlock, comprising a casing having a curved guideway, a rotatable shackle movably mounted in said guideway and partly projecting from said casing, said shackle having a lug, said casing having a guideway with which the lug of the shackle engages to limit the movement of said shackle, a slidable member serving in a predetermined position to hold said shackle against rotation, and key-operable tumbler levers con trolling said member.

3. A padlock, comprising a casing, a rotatable shackle, a slidable member servin in a predetermined position to hold sai shackle against rotation, and key-operable tumbler levers having cutaway parts adapted to register in predetermined positions of said levers, said slidable member having a part adapted to cooperate with said levers, whereby in said predetermined positions of said levers said part is free to move with said slidable member.

4. A padlock, comprising a casing, a rotatable shackle, a slidable member serving, in a predetermined position, to hold said shackle against rotation, said member having slots, said casing having pins in said slots and serving to guide said member, and key-operable tumbler levers having cutaway parts, said slidable member having an arm controlled by said levers, whereby, in predetermined positions of said levers, said arm can move in said cutaway parts.

5. A padlock, comprising a casing, a rotatable shackle, a slidable member serving in a predetermined position, to hold said shackle against rotation, means for guiding said member within said casing, key-o aerable tumbler levers, each having a plura ity of cutaway parts having a partition therebetween, said partitions having openings therethrough adapted to register in predetermined positions of said levers, said member having an arm arranged to pass through said openings of said partitions when said openings register, whereby said slidable member can move toward or away from said shackle when said levers are in the predetermined positions above-mentioned, and a spring controlling said levers.

6. A padlock, comprising a casing, a rotatable shackle having a gap, and adjacent to the ends of said gap, notches, and a slidable member having extensions adapted to engage in said notches and having a part adapted to engage within said gap in a predetermined position of said slidable mem ber, said slidable member being key-controllable.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

LAWRENCE A. E. CORLEY BYRNE.

Witnesses RALPH S. DARoY, C. OBRIAN.