US169211A - Improvement in padlocks - Google Patents

Description

B. WAL LMAN N.

Pad-Lock` FIG. l0.

Patented Oct. 26,1875..

UNITED STATES PATENT EEICEa BODO WALLMANN, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN PADLOCKS.

Specification forming part of Letters Patent No. 169,211, dated October 26, 1875; application filed August 31, 1875. l

To all lLoh-0m t't may concern:

Be it known that I, BODO WALLMANN, of the city and county ot' San Francisco, State of California, have invented Improvements in Padlocks, of which the following is a specilication:

My invention in padlocks consists essentially in arranging the working parts so that the bolt shall be in direct communication with the dog by means of a connecting spi-ral spring,

` whereby the same may be actuated by an ordinary plate-key, follower, hasp, and tumblers, in such manner that this connecting spiral spring shall be always contracted or at rest in the normal state of the lock, but shall be at its fullest tension at the points of locking and unlocking, and shall exert such force in a direct line; the object of my invention being to construct by this device a strong, simple, cheap, secure, and durable lock, as hereinafter described.

Figure l is a front view or vertical longitudinal elevation of the padlock embodying my invention, wherein it is shown with the plate of the casing removed. Fig. 2 is a vertical transverse section of Fig. l through the line a: Fig. 3 is a vertical longitudinal elevation of this padlock with tumblers and front plate removed, showing the hasp disengaged from the bolt. Figs. et, 5, and 6 are an end plan and side view, respectively, of the dogpiece. Figs. 7, 8, and 9 are an end plan and side view, respectively, of the bolt. Fig. 10 is a side View of the key. A

With reference to the drawing, C is an ordinary metallic padlock-casing, provided with xed pins f f f, for the fitting thereto of a covering-plate, P, and also a pin, g, and teats h and i, for receiving a hasp, H, dog D, and set of tumblers T T T, respectively,.while the remaining parts, consisting of a bolt, B, and connecting spiral spring S, form'with this dog D, in their construction and arrangement, the essential features of this my improvement. The dog D is adjusted to the teat h, fixed to the casing C, and forming part of a guide, Z, for the bolt B, and differs from the general form of such movable lockpieces in being provided, in addition to the ear r, with two arms, one, a, carrying a pin, b, for the attachment thereto of a spiral spring, S, and the other, c, for use both as a slide-bit and stop to the bolt B. This bolt B is provided at its shank end' with a projecting pin, p, for the 4connection thereto of this spiral spring S from the arm a of the dog D, and, when actuated backward or forward, is made to slide between the upper casing-plate k and the lower guides and G. At about the middle of the lower part of this bolt B it projects downward into the shape of a deep flange-piece, F, wherein a groove, m, is'so arranged as to admit of -the slide-stop c therein during the travel of, or forward movementof, the bolt. This ange F is also hollowed out in the shape of an arc on one side, so as to allow of the travel of this stop c against it when the dog D is being turned on the xed teat h, and it serves to hold the bolt B stationary. Also, a lug, o, is fixed onto the dan ge F of the bolt, so that an ordinary set ot" tumblers, T T' T, with actuating-springs c c o, respectively, properlywarded key K, and follower E, may cause this lug o to enter the slots y y y of these tumblers when the bolt B is being pushed back by this key K.

The operation of this lock is as follows: Supposing the hasp H to be secured by the bolt B in the usual manner, and it -is required to release the same or unlock, the key K is inserted into the follower E and turned from left to right, so as to press against the lower part of the flange-piece F. This will move the bolt B backward between the guides k, l, and G, and cause the lug o to enter the slots y y y of the tumblers T T T", while the dog D is kept stationary by reason ofthe grooved part m ot' the bolt holding in place the slidestop c during its travel, but as this bolt keeps on receding it necessarily will elongate the spiral spring S and increase its tension till such time as the groove m releases the stop c, when, the bolt being freed at the same instant from the hasp H, the full force of this spring will be exerted in bringing up the dog-'ear 1' and throwing well outward the hasp H, thus unlocking the padlock. For reversing the operation, or locking, the hasp H is pressed downward, in the usual manner, onto this ear by reason of the dog D being made to turn on its fixed pin h, and in so doing the spring S becomes again elongated by the receding of the pin b from the bolt-shank pin p, (as the bolt B is prevented from moving by the action of the stop 0,) but when this stop c has arrived in line soas to coincide with the groove m .the spring S, having attained the requisite tension, shoots forward the now unobstructed bolt in the direction of this extended spring, and consequently with its full force, so that the locking is instantly effected.

By this arrangement a strong, simple, and cheap lock is obtained, since, independently of the usual hasp, key, follower, and tumblers,

the Working portions are restricted to a bolt,

dog, and connecting spiral spring. It is also 4 essentially a durable lock, for, as already explained, by reason of the spiral spring S o'nly being extended when actually required for use, it is not subjected to the wear and tear of other locks, wherein the springs are continually at tension, and, as this 'spring is spiral, and acts directly in line with the bolt, it has considerable advantage over those having a curved or circular movement. It is, besides, a safe or secure lock when compared to those with Ordin ary springs, inasmuch as a lock with a curved spring can readily be tampered with `by a blow from a lnallet on the side of the padlock-casing, which instantly disorganizes the spring and several pieces within, while in this device the various parts would have to be broken by such hammering before releasing the hasp.

I claim as my invention- 1. The spiral spring S, connecting the dog D by its arm a, and pin b to the bolt B by the shank-pin p, arranged so as to actuate the bolt B longitudinally between the. guides l, G,

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