US12186A - Padlock - Google Patents

Description

UNITED sTATEs PATENT oEEioE.

THOMAS YSLAIGHT, OFNEWARK, NEW' JERSEY.

rADLocK'.

Specification of Letters .Patent No. 12,186, dated January 2,1855.

To all whom t may concern:

Be it known that I, THOMAS ,SLAIGHT, of Newark, in the county of Essex and State of New Jersey, have invented a new and Improved Spring-Padlock; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1, is a front View of my improved padlock, the casing nearest the eye being removed in order to show the interior. In this view the end ofthe shackle is within the casing, and the lock is in a locked state. Fig. 2, is the same view as Fig. 1, with the exceptionthat the end of the shackle is out of the casing, and the lock in an unlocked state.

Similar letters of reference indicate corresponding parts in thetwo figures.

This invention relates to a' new and improved spring padlock, and consists 1st, in

the employment or use of a dog so constructed and arranged that the' end of the shackle when pressed or forced into the casing will act upon the 4dog .and throw it into a recess or notch in the shackle without the intervention or aid of a spring; 2nd, my invention consists in the combination of the dog above mentioned, guard bar, and tumblers, arranged as will be hereafter fully shown and described, for the purpose of preventing the lock from being picked.

To enable others skilled in the art to fully understand and construct my invention I will proceed to describe it.

A represents the casing of the lock constructed in the usual manner, and B is the shackle of the well known form one' end of which isV secured by a bolt (a) to the upper end of the casing,the shackle turning loosely thereon as usual. The opposite end of the shackle has a recess or notch (b) cut in itv which passes in and out of the casing through a'slo't (c) in its upper end.

C is a dog placed within the casing A and working upon a pivot (d). This dog has a recess (e) cut in it a short distance above the pivot (d) the lower edge or side of the recess projecting outward beyond the upper edge or side, the lower edge or side of said recess being directly underneath the slot (c) l the casing A.YThis guard bar works upon Y a pivot "(9)."and its `upper end/has a curved recess (h) cut in it directly below which there is attached a spring the lower end of which bears against the lower end of the dog C. To the guard bar D at a point about equidistantv'between its lower end and the pivot (g) there is attached a stud E, represents a series 'of tumblers, one end of which work upon a pivot Us), the edges of these tumblers at their opposite ends have slots (l) cut in them, one in each, at varying distances from the sides of the tumblers. The tumblers are provided with springs (a) as usual.

When the lock is in a locked state, as A shown in Fig. 1, and it is designed to unlock it, the key see Fig. 2, or rather end of the dog C and the upper end of the dog is thrown back by the action of the spring into the curved recess (It) at the upper end of the guard bar the projection (f) on the shackle being freed from the recess (e) in the dog, see Fig. 2.

To lock the lock all that is required is to press the shackle into the case, and the lower end of the shackle will bear upon the lower edge or sideof the recess (e) and throw the upper end of the dog in the recess or notch (b) the projection (f) on the shackle passing into the recess (e) and the upper edge of the guard bar D passing down behind the upper end of the dog, see Fig. 1.

By the above invention it will be seen that no spring is required to throw the dog into the shackle, even the spring (i) of the guard bar is not essential, or it may be dispensed with without affecting the general working of the parts. The great objection to spring padlocks hitherto has been the failing of the spring which has always been employed to throw the dog in the shackle.

I do not claim, the tumblers E separately, nor the guard bar, for they have been. previously used, but

What I do claim as new, and desire to secure by Letters Patent, is-

1. The employment or use of a dog C constructed as herein shown or in an equivalent way so that the pressure of the shackle upon it, when the end of said shackle is forced into the case, will throw the dog into the l5 recess or notch in the shackle without the intervention or aid of a spring or any other device.

THOMAS SLAIGHT.

Witnesses W. WHITNEY, HERVEY PARK.

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