Safes – bank protection – or a related device – Combined – Depository with verification indicia applying means
Patent
1982-01-12
1989-01-31
Weiss, John
Safes, bank protection, or a related device
Combined
Depository with verification indicia applying means
109 84, E05G 300, E04B 202
Patent
active
048008230
ABSTRACT:
An improved storage device is provided for enhanced protection from fire and theft. It has advantages of lightweight for transportation and installation, heavyweight for protection when in use, steel construction for theft protection, dry insulation for heat flow retardation, fluid for limiting internal temperature rise and low cost. These capabilities are achieved by constructing a multi-walled storage device having an inner wall of steel for theft protection, an outer chamber of insulation to reduce heat flow from an external source, and an internal chamber for filling with a fluid to absorb heat and thereby reduce the maximum temperature. The fluid boils off at a particular temperature and pressure to limit internal temperature. The outer insulation limits heat flow, thereby reducing the rate that fluid boils off. Duration of temperature limit protection is a function of heat capacity and heat of vaporization of the fluid and heat flow through the insulation. Use of dry insulation enhances resistance to high temperature before the fluid is fully boiled-off and therefore before the internal temperature can rise above the fluid boiling temperature.
REFERENCES:
patent: 131842 (1872-10-01), Brook
patent: 143309 (1873-10-01), Stinson
patent: 2829608 (1958-04-01), Blackburn et al.
patent: 4075798 (1978-02-01), Tazaki
Hyatt Gilbert P.
Weiss John
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