Telephone set line switch
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United States of America Patent
Stats
-
Dec 1, 1987
Grant Date -
N/A
app pub date -
Oct 3, 1985
filing date -
Oct 3, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A line switch for a telephone set comprises a lever rockably mounted in thetand 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.
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