US76898A

US76898A - Improvement in fire-pkoof safes

Info

Publication number: US76898A
Authority: US
Publication date: 1868-04-21
Anticipated expiration: 1885-04-21

Description

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Letters Patent No. 76,898, dated April 21, 1868.-

IMPROVEMENT IN FIRE-PROOF SABES.

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TO ALL WHOM IT MAY CONCERN: y V

Be it known that I, JOHN FARREL, of the city, county, and State of New York, have inventeda new and useful Improvement in tho Construction of Fire-Proof Safes; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to theaceompanying drawings, making part of this specification, in which- Figure 1 is a. front view of the safe, with the door open.

Figure 2, a. vertical section, at the line A a, oftig. 1, with the door closed; and

Figure 3 a horizontal section, at the line B b, of iig. 2.'

The same letters indicate like parts in all the figures.-

As heretofore constructed, the frame of the door of tire-proof safes, and the front casing thereof, into which the door fits, have been formed each of one plate or piece of wrought or ca's'tiron; but experience has proved that this plan of construction is very objectionable, for the reason that the junction of the edges of the door with the front iron casing of the safe forms a good conducting-surface to convey heat to the inside of the safe. A

The object of my invention is to overcome this difficulty, and the nature of my invention consists in making the iron frame of the door, and the front iron casing of such safes, each of two or more plates of iron, and securingvbetween each of said plates a non-conducting substance, to prevent the conveyance of heat from the outside to the inside of the safe. y p

In the accompanying drawings, a represents the inner shell of the safe, the front side of which is formed with the usual opening for the reception of valuables, and the front edge formed with a square flange all around it, as at b. To the outer facev ot' this flange is fitted any suitable non-conducting substance, e, such as a strip of felt, wood, cork, cloth, annel, or any other poor or non-conducting material, and then the inner edge, c', of

the front casing of the outer shell l is secured to the llange Z7, with the non-eonducting material interposed, by

means ot' screw-bolts, which pass into ears or lips e, cast en to the said inner edge of the front casing, leaving a considerable portion of the non-conducting material exposed, asshown in the drawings.

The doory` is hung in the usual way, and is also formed of two separate pieces 0i' iron, lettered g and h in the drawings. The inner edge of the outer plate y is formed all around with a lsuitable flange, t', and to this vflange is fitted another'strip, oi` any suitable non-conducting substance, j, and then one edge of the plate t, forming the inner half of the door, is secured to the ila-nge z', with the non-conducting material interposed, byl means ot` screw-bolts, which pass into ears lc, easton the inner side of the plate h, leaving much of the nonconducting material exposed.

It will he seen from the drawings that, when the door of the safe is shut, the surfaces ot' the non-conducting material in the front easing and in the door are in close Contact, and this interpositiou of the non-conducting substance between the door and outer casing of the sat'e eiiectually breaks-the conducting-power of the iron to the inside of thesafe, and, consequently, adds greatly to the security of its contents.

I do not wish to confine myself to making the front casing of the safe and the door each of two plates or pieeesof iron, with an interposed non-conducting material, as it will be obvious that the door and front casing of the safe may be made of more than two pieces of iron, and that any good non-conducting substance may he interposed between them. f i

Having thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is i Constructing the front casing and the door of tire-proof safeseach of two or more plates of iron, with a non-conducting substance interposed between the several plates, substantially as described, and for the-purpose set forth.

JOHN FARREL. Witnesses:

ANDREW DE Laer, PETER Dn- LACY.