US73309A - glover - Google Patents

Description

@uiten faire gamut 'fitta EBENEZER D. DRAPER, OF HOPEDALFJ, AND EDWARD vW. VGLOVER,A 0F

MEDFORD, MASSACHUSETTS. y Letters Patent No. 73,309, dated' January 14, 1868.

liiitriioinjnrurl1N' riar-rnoor SAFE:

-TO ALL PERSONS TO- 'WI-IOM THESE PRESENTSMAY-COME:

Be it known that we, EBENEZR D. 'D-RAPER, of Hopedale, in the county of Worcester, andv EDWARD W. GLOVEI., of Medford, in the countyr of Middlesex, and State of Massachusetts, have invented a new and useful Improvement in Fire-Pifoot` Safes and we do hereby declare the same to be fully described inthe following specification, and represented in the accompanying drawings, of which-T- Y Figure 1, is a vertical section, and ki Figures 2 and 3 are horizontal sections, of a safe provided with oui' invention.

In such drawings, A denotes theouter case of the safe, as formed of plate-iron.' Bis the inner case, which may be of either wood or iron. C C are the jambs or-frauie of the door-opening. E is an inner safe or iron box, usually made of. steel, and torineda burglar-proof. F is the door, hinged to one of the jambs, in the ordinary way, I i i W'e have found that when `a safe is exposed in a lire, the heat and flame are more liable to gain access to the interiorvthrough and about the joint 'aii'd jambs of the door than in any other portion or parts of the safe, the janibs being a means of conducting the lieat'fromtlie external to the internal casing.

The main object of our invention is to prevent this passage of heat through the jambs and door, and, for this purpose, we insert within the jainbs a stratum of mica. or its equivalent, and also a stratum of fusible metal. We also insert in the door-frame such strata of mica and fusible metal.

For this purpose, we form the jambs in two separate frames or parts, a b, or with a groove between the two, to receive the strip or stratum, c, of mica, and the stratum, dfof lead or fusible metal. In other words, we insulate one-half or portion of each of the jauibs from the rest of it, by means of one or more plates or strata of mica and fusible metal placed between the two, and reaching to the lieat-resisting stuiing of the safe.

The mica inthe door is shown at e', and the fusible metal at d. The stratum of fusible metal-is laid alongside of the stratum of mica, and should be a metal or composition which will melt at a temperature of about 212 Fahrenheit. '1lie stufing or illing of the door, and between the inner and outer cases of the body of the safe, is shown at f.

The purpose of the fusible metal is to melt when the temperature may reach 212 Fahrenheit, or there abouts, and, by running out of the space or spaces containing it, leave it or them open or containing air, which may operate as an additional means of preventing the heat from passing from one part of the jamb or door to the other part.Y v 5 The mica may be employeclwithout the fusible metal, but we prefer to use the latter, on account of making a better finish with it, and of its being advantageous in other respects.

We also insulate the burglar-proof, or inner safe, from the outer one, by a stratum of mica, or by strata of mica. and fusible metal, arranged between its external surfaces and thcadjacent internal surfaces of the inner caseof the safe,ltlie same being as shown atig and L, the mica being exhibited' at g, and the fusible metal at L.

We cut o or break the passage of heat into the safe by means of a material which is a very slow conductor of heat, and almost, if not entirely, indestructible by heat, and thus we pvercome the diliculties to which most iron safes are liable, viz, the passageA of heat through the door-frame and thejainbs, or those parts which-are not insulated by the cement or fire-proof lining, llinggor stuilng.

We are aware that, in the construction of a safe, a lining of soapstone has been arranged between the internal/and external plates of both the safe and the door; also, that the door has been made of a plate of iron lined with soapstone, and that the jambs ot' the dooropening have been made of soapstone. We do not claim such; as our' invention differs materially therefrom, and hasreference more particularly to safes made with metallic jambs, and with doors chambered, and containing a. filling or stalling of cement.

What, therefore, we claim, as our invention or improvement in a safe, is i The combination and arrangement of a. heat non-conductor, c,\of mica. or its equivalent, with each or either of tliemetallic jambs or sides of the door-frame, and the filling thereof, ,the whole being substantially as and for the purpose specified. I v

And we claim the combination and arrangement of one or more strata of fusible metal, d, with the mica or heat non-conductor c, arranged in safe, substantially in manner and for the purpose specied.

We also claim the combination and arrangement of mica orits equivalent, or of mica and fusible mtal, with the sides ot' the burglar-proof and the next adjacent internal surfaces ot' the safe, the whole being substair tinlly as specified.

' E,. D. DRAPER,

EDWARD W. GLOVER..

Witnesses:

R. II. EDDY, I". P. HALE, Jr.

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