Blast proof apparatus for the coin return cavity of a public pho

Details Blast proof apparatus for the coin return cavity of a public pho Blast proof apparatus for the coin return cavity of a public pho

1997-07-17

1998-12-08

Chiang, Jack

Telephonic communications

Terminal accessory or auxiliary equipment

Protective structure

379145, H04M 1700, H04M 100

Patent

active

058481532

ABSTRACT:
A blast proof apparatus for the coin return cavity of a public phone, having the embodiment of the coin return cavity cover comprises an inner cover and an outer cover; a spring element between the said inner cover and the outer cover forming an elastic force to bind the two covers closely contact with each other, a plurality of through holes formed on the surface of the inner cover, the said cover combination being then placed to the coin return mouth by a pivot so the cover is able to be pushed inward for money removing process. If an explosion occurs inside the coin return cavity, the high pressure formed by the explosion pushes the outer cover outward through the through holes on the inner cover and is released in order to avoid possible damages in the coin return apparatus.

REFERENCES:
patent: 4966325 (1990-10-01), Anello et al.

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