US82658A - Philip j - Google Patents

Description

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Letters Patent No. 82,658, dated September 29, 1868.

IMPRQVEMENT IN GOMPOUNDSAFE-DOOB. HING.

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T0 ALL WHOM IT MAY CONGERN Be it known that I, PHILIP J. STUHLTRAGER, of Philadelphia, Pennsylvania, have invented a Compound Hinge for Safe-Doors, lite.; vand Ido hereby declare the following to be a full, clear, and exact description of the same.

My invention consists of a'compound hinge, constructed and applied in the peculiarman'ner fully described hereafter, for the purpose of avoiding the necessity of rounding olf or bevelling the outer edges of safe and' other' doors.

In order to enable others skilled in the art to make and apply my invention, I will now proceed to describe its construction and operation, reference being had to the accompanying drawing, which forms a part of this specication, and in which- 4 Figure 1`is an exterior view of my improved hinge applied to a safe-door.

Figure 2, a sectionalplan view on the line 1 2, iig. 1.

- Figure 3, the same, showing the dopr'partly opened.'

Figure 4, 'a perspective View, and v Figure 5 a rear View of the hinge as it appears when the door is partly opened.

Similar letters refer to similar parts throughout the several views.

A represents an ordinary fire or burglar-prooi` safe, and B the' door ofthe same. The plates C C C of the hinge are secured to the front of the safe, and each plate is provided' with a tubular projection, a, between which fit the tubular projections b b of a plate, D, the joint being completed by arod, e, which is riveted at each end, or otherwise secured in its place, (see fig. 3.)

At the opposite side gf the plate D are other tubular projections, b', between which are recesses for the l reception of the projections,f, cfa plate, E, the latter and the plate being connected by a rod,g.

The third joint of the hinge is rformed by tubular projections, f, of the plate E, and7A the projections h of two plate's F F, which are secured to the door of the safe, the joint bcingcompleted, as in the former instances, ,byl a single rod, z'.

r When a safe-door is hung upon ordinary single-jointed hinges, its outer edge, in order to open and close p properly, and yet preserve a tight joint, gmust be bevelled or roundedoff on the arc-of a. circle described from 'the' centre of the hinge, as indicated by the dotted line ziiuig. 2.

This bevelling of the outer edge necessitates a corresponding bevel or increase in the thickness of that portion of the safe with which the -outer edge ofthe door has vto coincide when closed. The bolts of the lock on the inside of the outer edge must also be thrown back towards the hinge, andtheir resistance to outward strain is consequently muchdecreased, whilethe edge of the door itself c'au be more readily cut away from theoutside'than if it were straight. l

i lBy the use of my compound hinge, however, the operation of which I will now proceed to describe, I vam enabled to construct a door of any desirable' thickness, and having a straight outer edge at right angles to the face of the door. i t

In fig. 2, the door of' the safe is represented as closed and secured by a lock, H, worked, in the present instance, from the centre of the door, and 'having four bolts, 'iz'z', as shown in iig.

.After unlocking 'the door, it is not :turned directly upon its hinge in the usual manner, as such motion would be prevented by the straight edges, y y, of the safe, but it is irst drawn directly outwards until the door and the various sections of its hinge assume the position shown in g. 3. The door may then be turned, as upon an ordinary hinge, to the position shown in g. 4, or it maybe opened to a still greater extent.

In closing the door, the operation is merely reversed, the door beingfirst turned until opposite the opening in the front of the safe, and then pushed directly inward, the sectious'ot` the hinge adapting themselves to the various motions which are given to the door. i

I prefer, for the sake of strength, to hang the door by one continuous hinge, as above described, but'it will he evident that two o1? more separate hingesmsy be used, and, if desired, portions of the hinge may be coucealed, by moulding or otherwise, so as to expose but e small part of the salme.

Although I have described invention as applied to safe-dooie only, itwill be evident that it may be used in other instances, and, for some purposes, at hingehaving more than three joints may be advantageously employed. i i

I claim as my invention, and desire to secure by Letters Patent- A compound hinge, constructed and applied substantially as and for the purpose herein described.

In testimony whereof', I have signed my name to-this specification in the presence of two subscribing witnesses.

PHILIP J. STUHLTRAGER.

Witnesses:

JOHN WHITE, HARRY SMITH.

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