G - Physics – 08 – B
Patent
G - Physics
08
B
340/148, 340/30
G08B 21/00 (2006.01) G08B 21/04 (2006.01)
Patent
CA 1167945
ABSTRACT A device for monitoring the physical activity of persons comprises a movement detector electrically coupled to drive time-delay circuits, the outputs of which are connected to drive an alarm device such that in the presence of the movements detect- ed by detector the alarm device is held in its OFF condition and is switched to its ON condition in the absence of such move- ments after a pertaining time-delay. The time-delay circuits are respectively arranged to provide time-delays of 30 seconds, 6 seconds, 40 seconds, with the first and second time-delay circuits being connected in series and the third time-delay circuit connected in parallel with the first two. The movement detector comprises at least one tubular housing containing a freely movable ball and means for establishing an electrical output signal according to movement of the ball or an acousto/electrical transducer or a mechanical/electric transducer. A pulse shaping and isolating circuit is located at the output of the detector which provides pulses of predetermined amplitude and duration to the time-delay circuits within time intervals determined by the movement detector.
353181
Cohen Ellis B.
Marks & Clerk
LandOfFree
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