Sound activated transmitter
First Claim
1. A remote annunciator system for indicating, at a point remote from a first annunciator which can emit an acoustic signal when actuated, the emission of an acoustic signal by said first annunciator, said system comprising:
- a transmitter unit comprising;
an acoustic signal detecting means positionable adjacent to said first annunciator for receiving acoustic energy of an acoustic signal emitted by said first annunciator and providing an output signal in response to the acoustic energy of the acoustic signal emitted by said first annunciator; and
a radio frequency transmitter electrically connected to and responsive to said output signal of said detecting means for transmitting a radio frequency signal upon receipt by said detecting means of acoustical energy of the acoustic signal emitted by said first annunciator;
a remote annunciator unit positionable remotely from said transmitter unit and comprising;
a radio frequency receiver for receiving said radio frequency signal from said radio frequency transmitter; and
a second, annunciator electrically connected to said radio frequency receiver for emitting a human observable signal when said radio frequency receiver receives said radio frequency signal.
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Accused Products
Abstract
A remote annunciator system in which the emission of an acoustic signal by a first annunciator is detected by an acoustic signal detector which causes a radio frequency transmitter to transmit a radio frequency signal. A radio frequency receiver which receives the signal operates a second annunciator which is remote from the first annunciator, to cause the second annunciator to emit an audible or visual signal. Preferably, the radio frequency signal is encoded and is decoded at the receiver, and if the first annunciator can emit two different accoustic signals, the transmitted signal is encoded dependent upon which acoustic signal is emitted and the receiver decoder causes the second annunciator to emit an audible signal or a visual signal which depends on the transmitted signal encoding.
43 Citations
15 Claims
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1. A remote annunciator system for indicating, at a point remote from a first annunciator which can emit an acoustic signal when actuated, the emission of an acoustic signal by said first annunciator, said system comprising:
a transmitter unit comprising; an acoustic signal detecting means positionable adjacent to said first annunciator for receiving acoustic energy of an acoustic signal emitted by said first annunciator and providing an output signal in response to the acoustic energy of the acoustic signal emitted by said first annunciator; and a radio frequency transmitter electrically connected to and responsive to said output signal of said detecting means for transmitting a radio frequency signal upon receipt by said detecting means of acoustical energy of the acoustic signal emitted by said first annunciator; a remote annunciator unit positionable remotely from said transmitter unit and comprising; a radio frequency receiver for receiving said radio frequency signal from said radio frequency transmitter; and a second, annunciator electrically connected to said radio frequency receiver for emitting a human observable signal when said radio frequency receiver receives said radio frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification