TELEPHONE SET FOR DEAF OR DUMB PERSON

摘要

PURPOSE:To inform a deaf person of a call by using a lamp or cubic type vibration directly or through an individual radio caller when certain level is detected in a demodulator. CONSTITUTION:When an output is detected in the demodulator 8 which has an automatic off-hook function at the time when called in a telephone circuit 1, the signal activates a radio calling transmitter 21 to send a weak electric wave. A receiver for individual radio call 24 receives it to drive a lamp indicator or the exciter 25 of a receiver cubic type. In case of a portable telephone set, when an output is detected in the demodulator 8, the lamp indicator on the cubic type of the set is turned on or the cubic type itself is vibrated.