Telephone set line switch

Details Telephone set line switch Telephone set line switch

1985-10-03

1987-12-01

Brown, Thomas W.

Telephonic communications

Terminal

Switch or switch actuator structure

379429, H04M 108

Patent

active

047109548

ABSTRACT:
A line switch for a telephone set comprises a lever rockably mounted in the tand for the set and having as a rear part a plunger fin received in a slot passing through the stand to a handset cradle on its top. The lever has at its front a head carrying on its underside a pair of metal leaf springs of which front portions form spring contacts disposed over corresponding electroconductive pads on a printed wiring board mounted within the stand. The lever is biased by a torque spring to yieldably hold the upper part of the fin in the cradle. Removal and replacement of a handset from and to the cradle actuates the lever to produce engagement and disengagement, respectively, of the spring contacts with their corresponding pads. Such spring contacts and pads form, electrically speaking, a line switch adapted upon such engagement and disengagement, respectively, to produce a "short" and an "open" of terminations at the set of the tip and ring leads therefor.

REFERENCES:
patent: 4188512 (1980-02-01), Lord
patent: 4268726 (1981-05-01), Chu
patent: 4326108 (1982-04-01), Barkow et al.
patent: 4363941 (1982-12-01), Nelson
patent: 4572930 (1986-02-01), Kakuta et al.

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