US220637A - Improvement in padlocks - Google Patents

Description

F. W. MIIX. Padlock.

No. 220,637. Patented Oct. 14, 1879.

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UNITED STATES PATENT OFFICE FRANK W. MIX, OF TERRYVILLE, CONNECTICUT.

IMPROVEMENT IN P ADLOCKS.

Specification forming part of Letters Patent N0.'220,637, dated October 14, 1879; application tiled June 9, 1879.

To all whom t may concern:

Be it known that I, FRANK W. MIX', of Terryville, in the county of Litcheld and State of Connecticut, have invented certain new and useful Improvements in Padlocks, ot` which the following is a specification.

Many ot' the parts shown in this application are also found in another application ot' even date herewith 5 and so many features of invention as are common to both applications are intended to be claimed in the other application, thereby making this the subordinate case and the other the foundation one.

My invention, as herein described and claimed, relates more particularly to a sliding shackle locked at the heel, or both the heel and toe and consists in the peculiar construction ot' the parts and in their combinations, as hereinafter described.

In the accompanying drawings, Figure 1 is a side elevation ot a padlock which embodies my invention. Fig. 2 is a like view ot the same, with the front plate removed and the shackle locked. Fig. 3 is a like view ot' the same, with the shackle unlocked. Fig. 4 is a transverse section ot' said lock on line a0 ot' Figs. 1 and 2, and Fig. 5 is a trans-verse section on line y y of said figures.

The lock-case A is divided longitudinally into two parts, which, when together, are bored out to receive the key cylinder B of an ordinary pin-tumbler lock. I prefer to divide this ease on one side of the middle, so that one side will contain a little more than halt' ot' said cylinder, as shown in Figs. 5 and 6. The position of the pin-tumblers is indicated by broken lines in Fig. 3, but not being new it is considered unnecessary to describe them.

The key-cylinder B, which also contains pin -tumblers, is provided with a iiat steel ,scroll spring, a, one end of which is secured to the case and the other to said cylinder, so as to throw the cylinder, when released, into the proper position for the pin-tumblers to lock the cylinder against rotation. A wire spring,

or other ordinary kind of spring, may be substituted for the spring a, if desired.

A short hub, c, of the same size as the cylinder B, extends into the case a short distance, as shown, which hub is slotted or recessed for the stop-pin h of cylinder B, the ends of the slot acting as a stop to check the cylinder at the proper point for locking it.

One side of the cylinderB has a longitudinal groove, d, Fig. 2, so located as to be in front of and over the heel ot' the sliding shackle C when the lock is unlocked, and the heel of the shackle has an arm, e, which tits said groove. Said shackle is projected, when released, by means of springf, Fig. 3.

The nose of the shackle is locked by a springactuated dog, D, which dog is forced out of engagement by a cam, E, on the upper end otl cylinder B.

W'hen the key-cylinder is locked by its pintumblers, the cani E allows the dog to take into the nose of the shackle under the inluence of its ,spi-ing, and the arm e on the heel of the sliding shackle enters a notch in the hub c below the slotted portion of thecylinder and under a solid portion thereof, whereby the shackle is locked at both heel and toe. A proper key inserted within the cylinder releases it when it is turned to the right, and the cam releases or withdraws the dog from the nose of the shackle, and the groove d in the cylinder comes directly over the arm e. The spring f then throws the shackle outward, the arm e passing upward through the groove l into the position shown in Fig. 3, thereby unlocking the lock, and also holding the cylinder from rotation. By depressing the shackle back into the case the arm e disengages from the cylinder, the' spring a returns said cylinder and its cam to its formerpositon, and the lock is aga-in locked. In this construction th key cannot be removed when the lock is unlocked.

1t' desired, lthe cam E might be so coupled to the cylinder that the latter can be turned onefourth of a revolution backward independently of the cam, when the key can be withdrawn wit-hout first relocking the lock. Such a connection of the cam with the key-cylinder is shown and described in the other application before referred to.

If the double cylinder is designed for use with the sliding shackle locking at the heel, the groove fl would be formed in the upper part of the cylinder rigid with the cam, and the heel of the shackle correspondingly shortened.

If desired, a sliding dog may be substituted for the spring-dog D, and bc operated both ways by the cam E'.

I claim as my invention- 1. In a padlock, a rotating cylinder grooved as at d, in combination with the heel of a sliding shackle, substantially as described, and for the purpose specified.

2. In a padlock, the key-cylinder of a pintumbler lock, in combination with the sliding shackle and mechanisms acting with said cylinder to lock the shackle at both heel and toe, substantiall y as described, and for the purpose specified.

3. In a pin-tumbler lock, the combination of the key-cylinder, grooved longitudinally, the sliding shackle with heel adapted to work in said groove, and a spring for turning the cylinder to throw the grooved portion away from the heel so soon as it passes out of the same, substantially as described, and for the purpose specied.

4. In a pin-tumbler lock, the combination of the rotating cylinder having a longitudinal groove, the sliding shackle having a heel fitted to work in said groove, and the spring f, for forcing the heel of the shackle into the groove of the cylinder, substantially as described.

5. The combination of the key-cylinder of a pin-tumbler lock, having groove d, the sliding shackle having arm e, and the springsa and f, acting on said cylinder and shackle, respectively, substantially as described, and for the purpose specified.

6. The combination of the key-cylinder B, spring a, cam E, dog D, sliding shackle C, and spring f, substantially as described, and for the purpose specified.

FRANK W. MIX.

Witnesses:

H. B. PLUMB, ELIsIIA MIX.

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