US288774A - Snap-hook - Google Patents

Description

(No Model.)

L. C. CHASE.

SNAP 1100K. No. 288,7?4. Patented Nov. 20, 1888.

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UNITED STATES ATENT vries.

Lucius o. cansa-or Bosron, nnsskcnusnrrs.y

SNAP-HOOK.

SPECIFICATION forming part of Letters PatentNo. 288,774, dated November 2G, 1883, Application filed May 21, 1883. (No model.)

To @ZZ whom zit may concern:

Be it known that I, LUoIUs C. CHAsn, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Snap-Hooks; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art tov which it appertains te make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure l is a perspective view of my improved snap-hook, showing it attached to the end of a cord. Fig. 2 is a similar view of the same adapted to be attached to a strap. Fig. 3 is a longitudinal vertical section of Fig. l. Fig. 4 is a perspective view of the body ofthe hook as it appears when removed from the mold, and Figs. 5. and 6 are detail views.

Similar letters of reference indicate eorrespending parts in all the figures.

My invention has relation to snap-hooks for bridles, harness, or similar articles; and it consists .in the improved construction and combination of parts of the same, as hereinaiter more fully described and claimed.

In the accompanying drawings, the letter A indicates the body of the snap, which consists of an inwardly-bent hook, B, the end ofwhich is rounded, and a hollow sleeve, C, cast in one piece with the hook, the latter extending from the end of the sleeve. This sleeve is cast open at the side opposite to the side from the end of which the hook extends in a trough shape, U -shaped in section, and the hook is cast with its inwardly-bent end straight, and after the casting is done and the spring and the bolt, which will be described, are inserted the body is placed in a die, which will close the sides of the sleeve and bend the end of the hook, thus doing away with the necessity of casting with a core. A hollow thimble, D, slides inside the sleeve, and the closed end of. the same, which extends out of the end of the sleeve at which the hook is, is slightly concave for the reception of the inwardly-bent end of the hook. Inside this thimble is placed a spiral spring, E, which is of about the double length of the thimble, and which bears with one end against the inside of the end of the thirnble,y and with the other end against the end ofthe cord F,when the latter has been inserted, forcing the thimble out to bear against the end of the hook.

When the snap is used attached to a strap, the end ofthe body forms an eye, G, as shown in Fig. 2, the shank H of which forms a eylindrical shoulder, I, of the same diameter as the sleeve when closed, against which shoulder the end of the spiral spring bears while the strap is buckled or otherwise fastened to the eye.

If desired, the thilnble may be provided with a projecting pin or button, J, as shown in Fig. 6, which will project and slide in a slot, K, formed by not closing the edges of the aps or sides of the sleeve entirely at the outer end of the same, the said pin serving to operate the sliding thimble, drawing it back when it is desired to unhook the snap. It will, however, be seen that it is not necessary to have the pin, as the thimble may be pushed back by simply pressing the side of the ring in which the hook is either hooked or in which it is desired to hook the snap against the rounded end of the hook and the end of the thimble, when the rounded end ofthe hook will allow the ring to enter between itself and the end of the thimble, pushing the latter back.

It will be seen that no means of fastening are necessary to secure the cord in the end of the sleeve, as the cord is inserted into the end of the sleeve when the thimble and the spiral spring are inserted, and the iiaps or sides of the sleeve being closed will press upon the cord and hold it firmly in place. It follows that the sleeve must be cast of some malleable metal when a snap is provided, which maybe manufactured at a small cost, no work being necessary, except the casting of the sleeve and the closing of the same, as the manner of casting the sleeve and hook with the sides open do away with the necessity of casting over a core, which again obviates the necessity of milling the inside of the sleeve out after easting, and the snap produced is effective of operation and simple to apply upon the object upon which it is to be fastened.

Having thus described my invention, I claim IOO and desire to secure by Letters Patent of the United States- 1. The combination ofthe body of the snap forming the bent hook at one end, and con- `5 sisting of the hollow sleeve, the sliding thimble concave at its outer closed end, and the spiral spring tting vwith one end into the thimble, as and for the purpose shown and set forth.

Io 2. rIhe combination of the body of the snap,

consisting of the hook having the inwardlybent rounded end and the sleeve, the sliding thimble having concave outer closed end,

the spiral spring fitting into the thirnble with a part -of its length, and the cord, to which the 15 snap is attached, held in place rrnly by the bent sides of the sleeve and forming an abutment for the other end of the spring, as and for thepurpose shown and set forth.

In testimony that I claim the foregoing as my 2o own I have hereunto affixed my signature in presence of two' Witnesses.

LUGIUS G. CHASE.

'Witnesses:

WVM. SECHER, Louis BAGGER.

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