Shock preventing telephone handset for paystation

Details Shock preventing telephone handset for paystation Shock preventing telephone handset for paystation

1994-03-31

1995-05-23

Dwyer, James L.

Telephonic communications

Terminal

Housing or housing component

379437, H04M 100

Patent

active

054188512

ABSTRACT:
Shock prevention elements for use in a telephone paystation handset consisting of a pair of polyester dielectric elements positioned over associated transmitter and receiver units so as to block high voltage potentials resulting from application of collect and refund signals applied to the paystation from an associated telephone central office.

REFERENCES:
patent: 4796288 (1989-01-01), Busch et al.
patent: 4984268 (1991-01-01), Brown et al.

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