Safes – bank protection – or a related device – Shields and protectors
Reexamination Certificate
1997-03-07
2002-04-02
Gall, Lloyd A. (Department: 3627)
Safes, bank protection, or a related device
Shields and protectors
C089S036020, C089S036040, C109S081000, C109S083000, C109S084000
Reexamination Certificate
active
06363867
ABSTRACT:
FIELD AND BACKGROUND OF THE INVENTION
The present invention relates to a system and method for preventing penetration to a secure area and, more particularly, to a system that automatically and reactively opposes such penetration.
Many methods are known for designing enclosures, such as safes and secure rooms, in a way that inhibits their penetration by intruders. Generally, these designs rely on passive inhibition of penetration. Representative components of passively protective enclosure walls include tough internal elements such as alloyed, hardened or carburized steel, or pieces of a ceramic such as carborundum, intended to obstruct drilling; bound elements such as combined metals, various types of concrete, etc.; materials of high thermal conductivity, such as aluminum or copper, intended to resist thermal break-in by conducting the heat away—for example, aluminum or copper fins that conduct the heat to the inner surface of the wall—and thereby not allow the temperature to reach the melting point; and heat-insulating materials. Representative patents in the field include U.S. Pat. Nos. 4,505,208 and 4,765,254, to Goldman; U.S. Pat. No. 4,696,250, to Maxeiner; German Patent No. 25 25 738, to Danzer; and German Patent No. 44 15 986, to Leine et al.
German Patent No. 28 21 281, to Bardehle et al., discloses a safe wall with explosive pellets placed inside and intended to explode in case of an attempted break-in. This design has the advantage over the traditional passive designs that it is reactive. It has the disadvantage, in most civilian applications, of possibly injuring the intruder and damaging the surrounding property in the course of deterring penetration.
There is thus a widely recognized need, and it would be highly advantageous to have, a reactive barrier to penetration that does not suffer from the disadvantages of presently known systems.
SUMMARY OF THE INVENTION
According to the present invention there is provided a barrier resistant to penetration by a burglary tool comprising: (a) a rigid housing; and (b) a mechanism for mechanically trapping the foreign object, enclosed within the housing.
According to the present invention there is provided a method of inhibiting penetration of a secured space by a burglary tool applied substantially perpendicular to its direction of penetration comprising the step of automatically applying a lateral compressive force to the burglary tool, thereby trapping the burglary tool.
The principle of the present invention is illustrated in
FIG. 1. A
rigid housing
10
is penetrated by a foreign object
12
such as a cutting tool. Housing
10
contains a mechanism for exerting a lateral pre-compressive force on burglary tool
12
. This lateral compressive force is represented in
FIG. 1
by arrows
14
. The lateral compressive force traps burglary tool
12
, and stops its motion, thus making it difficult for the intruder to either penetrate further into housing
10
or withdraw burglary tool
12
from housing
10
. For reference in the description below, double headed arrow
16
defines the longitudinal direction with respect to housing
10
.
Typically, housing
10
is a steel tube sealed at both ends. Devices of the type illustrated in
FIG. 1
may be used as such, for example as bars of prison cells. In most applications, however, an array of devices of the type illustrated in
FIG. 1
is included in a wall, along with some of the conventional, passive anti-penetration systems described above. Because these devices are not used alone in most applications, they are referred to herein as “barrier components”.
An important aspect of the present invention is the optional reliance on the “shape memory” property of certain alloys. Most elastic materials, when subjected to a stress that exceeds their elastic limits, do not return to their original dimensions and shape. Some alloys, that exhibit the shape memory property, can be restored to their original shape by heating. Many of these alloys are characterized by a martensitic phase transition at a certain transition temperature. Examples of such alloys include titanium-nickel, iron-manganese, titanium-nickel-palladium, copper-aluminum-zinc and copper-aluminum-nickel. Alloys of this type, for industrial applications, are produced, for example, by Special Metals Corp. of New Hartford N.Y.
REFERENCES:
patent: 63046 (1867-03-01), Hendrickson
patent: 604940 (1898-05-01), Matthews
patent: 712605 (1902-11-01), Shaaber
patent: 1236033 (1917-08-01), Almengual
patent: 1277859 (1918-09-01), Cieszkowski
patent: 1354671 (1920-10-01), Magnuson
patent: 1703416 (1929-02-01), Donaldson
patent: 2077729 (1937-04-01), Wilcox
patent: 2399691 (1946-05-01), Partiot
patent: 2405590 (1946-08-01), Mason
patent: 2867112 (1959-01-01), Krone
patent: 3205841 (1965-09-01), Shwayder
patent: 3779715 (1973-12-01), Wendler et al.
patent: 4104062 (1978-08-01), Weaver
patent: 4364300 (1982-12-01), Pagano et al.
patent: 5149910 (1992-09-01), McKee
patent: 6240858 (2001-06-01), Mandall
patent: 679244 (1992-01-01), None
patent: 364574 (1921-11-01), None
patent: 2424098 (1975-11-01), None
patent: 3241526 (1983-12-01), None
patent: 2365680 (1978-05-01), None
patent: 535638 (1941-04-01), None
patent: 1584744 (1981-02-01), None
Gall Lloyd A.
Harrison & Egbert
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