Vandal-proof handset for a pay telephone

Details Vandal-proof handset for a pay telephone Vandal-proof handset for a pay telephone

1989-07-21

1990-11-27

Schreyer, Stafford D.

Telephonic communications

With check operated control

Fraud or interference prevention

379433, 379437, H04M 1702

Patent

active

049742582

ABSTRACT:
A vandal-proof handset for a pay telephone having apertures therein for allowing sound to pass therethrough. The handset includes a transducer for converting either sound to electrical signals or electrical signals to sound. The transducer is positioned within the handset proximate the apertures such that the sound is transmitted or received by the transducer through the apertures. A disk member for preventing access to the transducer through the aperture includes openings therein for allowing sound to pass therethrough. The disk member is positioned between the handset apertures and the transducer such that the openings in the disk member and the apertures in the handset are not in registry. The transducer, therefore, is not accessible through the disk member openings.

REFERENCES:
patent: 2453192 (1948-11-01), Bryant
patent: 3238313 (1966-03-01), Kalogris
patent: 4038502 (1977-07-01), Ambruoso, Sr. et al.
patent: 4436967 (1984-03-01), Cohen
patent: 4490586 (1984-12-01), Oliver
patent: 4518826 (1985-05-01), Caudill et al.
patent: 4518830 (1985-05-01), Drexler et al.
patent: 4862494 (1989-08-01), Matheny

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