Tamperproof pay telephone

Details Tamperproof pay telephone Tamperproof pay telephone

1990-03-21

1991-05-21

Schreyer, Stafford D.

Telephonic communications

With check operated control

Fraud or interference prevention

379438, H04M 115, H04M 1700

Patent

active

050181858

ABSTRACT:
A tamperproof pay telephone is disclosed. The tamperproof pay telephone includes a main portion having an upper coin housing portion with an upper coin housing wall, a handset, a cord connecting the handset to the upper coin housing wall of the upper coin housing portion of the main portion, and an attachment assembly for securing the cord to the upper coin housing wall, the cord including an inner tube liner, four telephone wires of which one is a power wire, the four telephone wires passing through the inner tube liner, the inner tube of stainless steel wire braided rope which is ultimately encased in a stainless steel armored hose so that the inner tube of stainless steel wire braided rope adds flexibility while adding protection by rolling when a cut to the cord is attempted, the inner tube of the stainless steel wire braided rope prevents the cutting open of the stainless steel armored hose in order to prevent access to the wires, as well as, preventing the twisting of the handset that would cause the stainless steel armored hose to unwind.

REFERENCES:
patent: 4845774 (1989-07-01), Arzounian

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