EP 0295456 B1 19910403 - ALARM INTERRUPTING MEANS, IN PARTICULAR FOR ALARM CLOCKS OR TIME SCHEDULING CLOCKS
Title (en)
ALARM INTERRUPTING MEANS, IN PARTICULAR FOR ALARM CLOCKS OR TIME SCHEDULING CLOCKS
Publication
Application
Priority
DE 3719087 A 19870606
Abstract (en)
[origin: US4894813A] The invention is directed to an alarm shut-off device for an alarm clock or timer permitting a signal delivered by the clock to be interupted or to be cancelled in that the user of the clock approaches the clock or merely moves a part of his body, for example, his hand, towards the clock. Preferably, the clock is equipped with a transmitter 2, 2' emitting infrared radiation or ultrasonic waves and a corresponding receiver 3, 3' which detects the infrared radiation or the ultasonic waves reflected by the moved body part 1. A signal shaping network 4, 5 and 6 determines the variation of the intensity with time, which variation is compared in a threshold switching stage 7 with a predeterminable value which, when exceeded, causes the alarm signal A to be shut off.
IPC 1-7
IPC 8 full level
G01S 17/88 (2006.01); G04G 13/02 (2006.01); G04G 99/00 (2010.01)
CPC (source: EP KR US)
G04C 21/16 (2013.01 - KR); G04G 13/021 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
US 4894813 A 19900116; AT E62350 T1 19910415; DE 3719087 C1 19880908; DE 3719087 C2 19931118; DE 3862244 D1 19910508; EP 0295456 A1 19881221; EP 0295456 B1 19910403; ES 2021410 B3 19911101; HK 57192 A 19920807; JP H078798 U 19950207; JP H084638 Y2 19960207; JP S63313090 A 19881221; KR 890000878 A 19890317; KR 910004438 B1 19910627; SG 56992 G 19930219
DOCDB simple family (application)
US 19915588 A 19880526; AT 88108105 T 19880520; DE 3719087 A 19870606; DE 3862244 T 19880520; EP 88108105 A 19880520; ES 88108105 T 19880520; HK 57192 A 19920730; JP 13717888 A 19880603; JP 5872793 U 19931029; KR 880006777 A 19880604; SG 56992 A 19920529