US86658A - Improvement in gate-hinges - Google Patents

Description

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To all w/Lomt't 'may concern Beit known that I, JERQME B. FARMER, of Indianapolis, inthe county of Marionand State of Indiana, have invented anew and useful Improvement in Hinges; and'I do hereby declare that the following is a full and vexact description of the same, reference being had to the accompanying drawings as a part of this specication, and to the letters of reference marked thereon, like letters always'reieiring to like parts.

The nature of my invention consists in the construction of hinges of variable leverage, (reckoning from the rivet uniting the pair to the -place of contact with the door or gate,) wherein the top hinge is similar to ordinary hinges, excepting the rivet-bearing, while the bottom hinge is made t'o project considerably further from the gate and post to the rivet, and both upper and lower hinge are provided with an hour-glass bearing for the rivets, and by this peculiar construction they have the effect on a gate or door, to'raise the same as it swings open, and at the same time keep theftop thereof leaning toward the latch-post. In other words, with this hinge on a gate, the gate will always close itself by its centre of gravity remaining on the side next the latchpost.

To enable others skilled in the art to make and. use my invention, I will now proceed to describe the same. Figure 1 is a perspective top view of both hinges.

Figure 2 exhibits the lowerrhinge in section and partly in detail.

Figure 3 shows miniature hinges on a gate.

A is the post hali` of the upper hinge, and its construction is very much like the same half of any other hingein common use.

B is the gate half= of the upper hinge, the distinguishing feature of which consists in the peculiar shape of the rivet-bore, or bearing,

G is the post-half of the lower or bottom hinge. The base of this piece is similar4 in shape to the base of the'other pieces, but it differs from others in having projecting ears cast on its face, and extending about two inches therefrom. In the outer ends of these ears small holes are drilled to receive the rivet which holds the two halves of the hinge together.

These ears are strengthened andtied together in their base-half by a tapering web, E, fig. 2, cast between them.

, The dotted parallel lines J show the position for the rivet in each piece of the lower hinge.' (See Iig. 2.)

D is the long gatef-halfof lower hinge. Its base is similar to the others, but the elongated neck oiv the hinge-end is peculiar to this piece only, and distinguishes it fromv any other hinge. This neckmay be made three inches long, (more or 1ess,) and is cast atv an angle of about forty-live degrees from the base.V

This lower hinge constitutes theleading feature of my invention.

vvBy making the ears of O two inches long and the neck of D a corresponding length, the rivet J is placed at such a distance from the gate, and so much further than the rivet of the upper hinge, that the gate opens on a tilt or wind, (always leaning shut,) the centre of gravity remaining on 'the latch-side until the gate is swung entirely open.l When it is entirely open, i. e.,

back againstl the fence, the centre of gravity changes to the hinge-side 'so much thatftheA gate will remain open of its' own accord.

Fig. 3 represents the position of a gate, partly open, `swung by these hinges. It is raised up and over sma obstacles 'in the act of opening. y

c', in g. 2, is the centre bearing of the rivet journalbox, or opening.

By observing the divided rivet-end of D in this figure, it -will be seen that the bearing7 for the rivet :is almost exactly the shape of an hour-glass, small in the middle and large at the edges.

Both hinges (the .upper'one as well the lower) have this same bearing for the rivet, and this shape gives free swing to the gate when it is thrown out of perpendicular, while the rivet is always held snug and free 4from play in the middle by the isthmus fi.

I am aware of the existence of the forked-bottom hinge, made of wrought-iron, having two legs, each leg terminating with a half-circle fork, (or saddle,) and these resting on staples for a base. forms a similar function to my hinge, but, unlike mine, it` will not permit the gateA to swing beyond a right angle to the position it occupies when shut, iwhile mine allows it to swing ninety degrees.

My hinge can be made of wrought-iron, though I prefer 4cast-iron or brass. entire security against breechy animals and careless children, as the gate cannot be opened bythe former, nor left open by the latter.

I do not `claim as original with me the idea of so hanging a gate or door as to incline it to swing shut by its own gravity; but

What I claim, is-

The combination of elongated necks in the lower hinge of a pair, with an hour-glass bearing for the rivets of both upper and lower hinge, all as set forth, and for the purposes described. d

Witnesses: JEROME B. FARMER.

JACOB ELDRIDGE, Guo. W. BRUCE.

This hinge per- Whenon a gate., it gives y

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