US226029A - Snap-hook - Google Patents

Description

i O. B. BRISTOL.

Snap-Hook.

N4 PETERS, FHOTO-LITHDGRAPHER, WASHINGTON, D C,

No. 226,029 Patented Mar. 30, 1880.

ihvrrnn TATES ATENT Prism SNAP-HOOK.

SPECIFICATION forming part of Letters Patent No. 226,029, dated March 30, 1880.

Application filed February 14, 1880.

To all whom it may concern:

Be it known that I, CHARLES B. BRISTOL, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Snap-Hoops; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-- Figure 1, sectional side view; Fig. 2, vertical section through the pivot-point; Fig. 3, perspective view of the tongue detached; Fig. 4, reverse side of the tongue; Fig. 5, inside view of one of the cheeks of the shank of the hook.

This invention relates to an improvement in that class of snap-hoops in which the tongue is pivoted in a recess in the shank of the hook, and particularly to that class in which the tongue is constructed with a cavity upon one side as a recess or 'inclosure for the spring, and for which Letters Patent of the United States were granted to me, dated May 16,1865; and the invention consists in the construction, as hereinafter described, and particularly recited in the claims.

A represents the shank of the hook B, the hook proper; C, the eye or loop; D, the tongue, all in substantially the usual general form for this class of hooks, and the tongue arranged between the two cheeks a b of the recess in the shank of the hook. The tongue D is constructed with a cavity, d, in one side, substantially as in my patent before referred to. In the center of this cavity is a stud, 6, less in diameter than the internal diameter of the coils of the spring f, and so that the spring may be placed on the said stud 6, one end, h, bearing up against the tongue, the other end, i, resting on the shank in the recess, so as to hold the tongue in its closed position, and yet allow it to be opened in the usual manner.

One of the checks, 1), is constructed with an internal conical or convex projection, a, at the point on which the tongue is to turn, and the tongue is constructed with a corresponding depression, m.

The two cheeks are cast a little farther apart than the thickness of the tongue, so that the tongue maypass down over the projection n until the projection on the cheek and the indentation in the tongue coincide; then the cheeks are closed upon the tongue, so that the projection enters the indentation and presses the stud 6 against the opposite check, the stud being slightly longer than the thickness of the tongue,

or so as to take a bearing on the opposite cheek before the surface of the side of the tongue will come in contact therewith. The interlocking of the projection 011 one part and the depression on the other, together with the bearing of the stud upon the opposite side, form a strong and substantial bearing upon which the tongue will turn.

As a convenience for guiding and forcing the tongue to its place an inclined notch, r, is made from one edge, terminating at the cavity, as seen in Figs. 2 and 4, so that if this notch be introduced onto the projection n it not only aids in guiding the tongue to its place, but also aids in forcing its way there should the space be somewhat less than the thickness of the tongue.

In working the tongue the end i of the spring necessarily slides more or less upon its bearing, producing considerable friction, which must be overcome by the spring itself. To overcome this difficulty I construct the bottom of the recess in the shank with a transverse rib, s, on which the end i of the spring will bear, thus presenting a very slight surface upon which the spring will bear.

It will be understood that the projectionn may be made on the tongue, and the depres sion m made in the cheek; but I prefer the arrangeinent first described.

1 claim- 1. In a snap-hook, the hook constructed with the recess at the shank end, with an internal projection or cavity on one check, in combination with the tongue, constructed with a corresponding cavity or projection on one side and with a recess in the opposite side, with a central stud extending to and so as to take bearing upon the opposite cheek, and a spring arranged in the recess of the tongue around said stud, substantially as described.

2. In a snap-hook, the hook constructed with the recess at the shank end, with an internal projection or cavity on one check, in

combination with the tongue constructed with a corresponding cavity or projection on one side and with a recess in the opposite side, with a central stud extending to and so as to take a bearing upon the opposiie check, a spring arranged in the recess of the tongue around said stud, and the notch or incline 1",

extending from the edge of the tongue toward the cavity for the pivot, substantially as described.

GHAS. B. BRISTOL. Witnesses:

J. H. SHUMWAY, J 0s. 0. EARLE.

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