Lock for pushbutton phone

Details Lock for pushbutton phone Lock for pushbutton phone

1987-03-31

1988-08-30

Ng, Jin F.

Telephonic communications

Terminal accessory or auxiliary equipment

Locking device

70DIG72, H04M 166

Patent

active

047682264

ABSTRACT:
A lock is provided for a pushbutton phone, whereby when a correct key is inserted to rotate a cylinder an actuating member is forced to rotate therewith so that two arms of the actuating member urge two sliding plates to slide, causing the projections of the sliding plates to bear against the arms of a confining member and enabling teeth on the arms of the confining member to lock up the pushbuttons. When the correct key is inserted to rotate the cylinder back to its original position, the projections of the sliding plates separate from the arms of the confining member and the arms then go back to their original states to release the pushbuttons.

REFERENCES:
patent: 4304971 (1981-12-01), Flax
patent: 4323739 (1982-04-01), Flax et al.
Telephony, "Phone Lock Product", Jun. 1, 1981, p. 118.

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