Telephone answer illuminating device

Abstract

Abstract PURPOSE:To secure an effective lamp lighting and thus save the power consumption, by controlling the glowing state of the lamp in accordance with the call signal of the telephone set. CONSTITUTION:The sensor 2 is sensitive to the call signal (a) of the telephone 1, and the output signal (b) is supplied to the control circuit 4 after the amplification 3. The amplified signal (c) resets the counter CT13 and presets the up-down counter 14. The signal (g) is obtained by the output (d) of the CT14, and thus the relay 5 works to light up the lamp Lp7. And when the signal (a) comes to an end, the down-counting is carried out down to the set value of the switch part 27. After this, the output (d) is set at a low level to turn off the lamp Lp7. And the FF10 is triggered via the turn-on switch 11 and the turn-off switch 12 each, and thus the turn-on and turn-off can be controlled for the lamp Lp.

Inventors

• 👤 Yoshihiro Nakatani
• 👤 Hisashi Tsuda

Bibliographic Details