초록 ▼

A motion detector having a motion sensitive switch, timing circuit, encoder and radio-transmitting circuit in a housing which may be affixed to a remotely-positioned article; and a decoding and receiving circuit housed in a second housing. The radio-receiving circuit receives the encoded transmitted

A motion detector having a motion sensitive switch, timing circuit, encoder and radio-transmitting circuit in a housing which may be affixed to a remotely-positioned article; and a decoding and receiving circuit housed in a second housing. The radio-receiving circuit receives the encoded transmitted signal and couples it to a decoding circuit; the decoding circuit is connected to a latch circuit which drives an alarm. The sensitivity of the alarm generation circuits are controlled by a timing circuit, and the alarm may be disabled in order to enable the operator to evaluate the nature of the incoming signals.

대표청구항 ▼

A system for remotely detecting motion of an article, comprising: a) a transmitting unit affixed to said article, comprising a motion detector switch having the characteristic of being momentarily closed when undergoing motion and being normally open at rest in any orientation; a battery and capacit

A system for remotely detecting motion of an article, comprising: a) a transmitting unit affixed to said article, comprising a motion detector switch having the characteristic of being momentarily closed when undergoing motion and being normally open at rest in any orientation; a battery and capacitor connected in series with said motion detector switch; a resistor discharge circuit connected to said capacitor, and a switching transistor connected to said resistor discharge circuit; an encoder circuit connected to said switching transistor, and a radio transmitting circuit connected to said encoder circuit; b) a receiving unit remotely positionable from said transmitting unit, said receiving unit comprising a receiving circuit connected to receive signals from said transmitting circuit; a decoder circuit connected to said receiving circuit; a latch circuit connected to said decoder circuit; and an alarm circuit connected to said latch circuit.