Cordless telephone set having a warning signal representing that

Details Cordless telephone set having a warning signal representing that Cordless telephone set having a warning signal representing that

1994-03-14

1995-12-26

Kuntz, Curtis

Telephonic communications

Audio message storage, retrieval, or synthesis

307 11, 320 64, H04Q 700

Patent

active

054794862

ABSTRACT:
When the contacts are electrically disconnected under a condition where a handset is set in a concave of a charging stand, the output of a connection condition detecting circuit is of low level. Then, an inverted output thereof, that is, a high-level output is provided through an inverter to one input terminal of an AND circuit, and a switch is closed by the weight of the handset, so that a high-level output is provided also to the other input terminal of the AND circuit. Then, a logical product output of the AND circuit is of high level. As a result, a warning buzzer generates a warning sound to attract the user's attention.

REFERENCES:
patent: 3740569 (1973-06-01), Carcia
patent: 4259548 (1981-03-01), Faher et al.
patent: 4451774 (1984-05-01), Akira et al.

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