US77432A - Obadiah marland - Google Patents

Description

TGQQSAFES, BANK PROTECTION AND RELATED DEViCES.

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@Qnitgh grates. am @ffim LamsPmm No. 77,432, dated April 28, 1868.

IMPROVEMENT'IN THE CONSTRUCTION OF SAPES.

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To ALL WHOM ITMAY CONCERN:

Be it known that I, OBADIAH ll/IARLAND, oi Boston, in the county of Suffolk, and State of Massachusetts, have invented an Improvement in Burglar-Proof Safes andVaults; and do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is.a,description.of my invention suificientto enable those skilled in the art to practise'it; I v Thcinvention relates to theconstruction of portable safes, banl-:-\'nults,'&c., with particular reference to rendering the walls of the same more effectually burglar-proof. I I i I The invention consists, primarily, in forming one or more of the-walls of alternate plates or sheets ot'iron and steel, welded togethcr'throughout' their adjacent surfaces, the plates or sheets being shaped and fitted together wnile the steel, which is welded to the iron, is in a soft or workable condition, the plates being hard- Also, in the construction of the iron and steel bolts by which the walls are confined together.

The drawing representsn vertical section of a safe or 'parts of a safe embodying my invention, only the parts adjacent to the corners being shown, as the more central parts are but continuations of the plate as represented at the breaks. I

The safe is not shown as lined with fire-proof packing, as my invention has nothing to do with such packinga 6 denote the front and rear walls of the safe; a and d, the top and bottom walls or plates; c, one of the end walls, which, with its opposite, corresponds in general construction to the construction of the wall 6.

I Each will is composed of a series of alternateflat plates or sections of iron and steel, (the iron being denoted by the letter f, andthe steel by the letter g,) these plates being first welded together by rolling, and then fitted, and suhseqdently hardened, each section extending over the whole surface of the wall, of which it forms an integral portion, dr'so as to meet at each of its, edges :1. corresponding section of the adjacent wall. In bringing the plates together at the corner, to form the joints, I make a zigzag or"steppcd formation, and I .then, at each two abutting steel sections, cut a portion of one section of steel away, so that the adjacent section shall project, over andrest against a corresponding steel plate, as seen at b, so as to prevent any insertion of a chisel or other tool at the joint, to pry open the bars, the tool, in being driven between the adjacent ends, encountering the hardened steel as soon as it gets to the end of the joint. At the joints of the door ,7, the safe is similarly protectcd, t-he-door being stepped at its edges, and the bottom of each joint being flanked or covcredby a steel surface.: v

To secure thewalls togethentheinner braces 0r angle-bars 2' have screw-bolts 70, made up of iron and steel in sections, a short rod oriagotbeing first made of iron and steel tubes, which fagot is drawn down, and has a screw out upon its shank, (the outer surface of the bolt being of iron,) and a head swag-ed at its end, as seen in the drawing.

The outer-corner caps Zare secured by bolts m, made and inserted as follows: Each bolt is formed ofiron, and may have upon the outer surface of itsshank a series of teeth, 11. Around thehole made in the plates for reception of'this bolt is a series of recesses. The shank is made hollow, or with a deep bore, 0. At the bottom of thebolt-hole, or into the bore in the bolt, a steel pin, j), is introduced, this pin being of-diamcter larger than the normal diameter of the hole made to receive it. :The bolt being riveted'into the plates, is driven against this pin, the sides of which are thereby expandecho'r driven into the recesses in the plates, the bolt, after being thus introduced, being-proof against any effort which may be made to withdraw it.

Safes called burglar-proof, as heretofore made, of alternate plates of iron and bars of steel without being welded together, have been easily p enetratedby boring through the outer plate of .iron, and breaking the f first plate of steel at a point opposite the hole so bored, then picking out and removing the broken pieces of "said steel plate,-and then boring through the next succeeding iron platc, and so continuing onthrough the whole series of iron andlsteel platcs'or bars, until the inside of the safe was reached.

But by constructing a safe in the manner herein described, all parts of its walls, top and hottor'n, and door, are renderedproof against all attempts to penetrate or force an entrance to its interior, for it the outer plate of iron is bored through, and the first plate of steel is broken,,it is impossible to pick out and remove the broken pieces of steel, for the reason that theyare all held firmly by the welding of the next plate of iron.- Neither can any attempts at prying open the safe, or at removing the cap-pieces, or boring through the bolts effect any success, for at every point the tool of the burglar is -met by hardened steel,'whieh he can neither break away nor penetrate. p

After making all parts of my safe, and nicely fitting them to each other, I then take each part, and submit it to a degree of heat suflicient to harden, by sudden cooling, all the steel employed in the construction, by which operations I am enabled to make a safe composed of alternate plates of iron and hardened steel welded together. l p

In constructing the safe with a packing, I use onfeitheror hoth sides of the packing, but preferably on both sides thereof, the same arrangement of series or layers of iron and steel plateswelded together, as will be readily understood.

It is well known that plates ofsteel and iron, when welded together, will resist a much greater pressure than when.the said plates are simply laid one over the other, or than when they are riveted together. There.

fore the welded plates of steel and iron in my safe have a great advantage in strength over all other constructions of burglar-proof safes.

I am aware that safes have been made, and, as I believe, for many years past, in whichtlie plates forming one of the walls or sides of the safe are each made up of bars, so that in each boundary there are sereruljoint-s,

' viz, one at each abuttal of adjoining bars, while in my safe I have no joints, except at the corners, and those connected necessarily with the door.-

I claim a safe or bank-vault, the boundaries of which are made up ofor are protected by entire compound plates, each of which is constitutedpf plate-layers of iron and steel welded together, the steel layer or layers of each laminated plate being hardened, substantially as shown and described.

I also claim the formation of the-joints at the corners of the safe, andat the edges of the door, so that the bottom ot each section of joint is covered by steel, substantially as shown and described.

I also claim the bolts k made of alternate tubes of iron and steel, drawn and welded together, substantially as set forth.

Also, inserting the bolts m into holes prepared, substantially as described, for their reception, and then changing the form of'thc bolts by pressure or percussion, so that thereby, and with the conjoined action of a spreader, p,the bolts at will hold in their sockets, substantiallyas described.

. OBADIAH MARLAND. Witnesses FRANCIS} GOULD, M. W. FROTHINGHAM.

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