Telephonic communications – Terminal – Switch or switch actuator structure
Patent
1987-12-08
1989-06-06
Ng, Jin F.
Telephonic communications
Terminal
Switch or switch actuator structure
379433, H04M 119
Patent
active
048378194
ABSTRACT:
A security device for use with a telephone handset having a microphone and an ear transducer is disclosed. It is adapted to prevent eavesdropping while the handset is in an on-hook position. The security device is comprised of switching means disposed in the handset adapted to disable the transducers. The switching means is switched to a first state when the handset is placed within a first predetermined orientation corresponding to a secure mode and is switched to a second state when the handset is placed within a second predetermined orientation corresponding to an operative mode.
REFERENCES:
patent: 2485574 (1949-10-01), Deakin
patent: 3715514 (1973-02-01), Bell, Jr.
patent: 3997737 (1976-12-01), Watkins
patent: 4504701 (1985-03-01), Lucchesi
patent: 4675901 (1987-06-01), Smith et al.
patent: 4691336 (1987-09-01), Durston
Ng Jin F.
Northern Telecom Limited
Vaas Randall S.
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