Importance

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Abstract

An apparatus for activating a doorbell chime and for remotely controlling an auxiliary doorbell chime includes a push button unit responsive to manual actuation for activating the doorbell chime and generating a radio frequency wave and a remote unit responsive to the radio frequency wave for generating an auxiliary acoustic frequency wave. The push button unit has a manually actuated switch assembly with a first pair of normally open switch contacts adapted to be connected in series with the doorbell chime and a source of electrical power and a second pair of normally open switch contacts, a radio frequency transmitter connected in series with the second pair of switch contacts for generating a radio frequency output signal and a first antenna connected to the transmitter and responsive to the radio frequency output signal for generating the radio frequency wave. The remote unit has a second antenna responsive to the radio frequency wave for generating a radio frequency input signal, a radio frequency receiver connected to the second antenna and responsive to the radio frequency input signal for generating a generator activation signal, and an acoustic generator connected to the receiver and responsive to the generator activation signal for generating the auxiliary acoustic frequency signal. The acoustic generator can be a speaker and the push button unit can include a power supply connected across the first pair of normally open switch contacts for receiving charging current and connected to power the radio frequency transmitter.

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First Claim