Wireless AC/DC bell

• US 5,583,477 A
• Filed: 03/08/1996
• Issued: 12/10/1996
• Est. Priority Date: 03/08/1996
• Status: Expired due to Term

• Current Assignee: Mosten Products Company
• Original Assignee: Mosten Products Company
• Inventors: Yen, Chason
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Wu, Daniel J.
• Application Number:
  US08/613,140
• Time in Patent Office: 277 Days
• Field of Search: 340/326, 340/328, 340/392.1, 340/384.1, 340/384.7, 340/825.69, 340/825.72, 340/825.31, 340/825.52, 340/539, 116/148, 455/66, 341/176
• US Class Current: 340/328
• CPC Class Codes: G08B 1/08 using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
• CPC Class Codes: G08B 3/10 using electric transmission; using electromagnetic transmission

Abstract

A wireless AC/DC bell which includes a transmitter circuit, which includes a battery power source, an indicator light, a modulation transistor, and an amplifier, and a receiver circuit, which includes a receiving antenna, a demodulator, an amplifier-rectifier circuit, a modulation transistor, a frequency discriminator, a register, and a speaker starter, wherein the transmitter circuit is driven by a bell button to produce a radio ringing signal; the speaker driver of the receiver circuit is driven to drive a speaker when the receiving antenna receives the radio ringing signal from the transmitter circuit and the received radio ringing signal is processed through the demodulator, the amplifier-rectifier circuit, the modulation transistor, the frequency discriminator, and the register.

Claims

1. A wireless AC/DC bell comprising:

a transmitter circuit, said transmitter circuit comprising a battery power source, an indicator light, a modulation transistor, an amplifier, and a bell button, said indicator light being turned on and the modulation transistor of said transmitter circuit being driven to provide a ringing signal when said bell button is depressed, said amplifier being to amplify the ringing signal from the modulation transistor of said transmitter circuit and then to drive the amplified signal out of said transmitter circuit, the modulation transistor of said transmitter circuit being connected to two bridging multiple switch connectors which have sets of bridging contacts alternatively selected to provide a radio signal of a particular oscillating frequency for output; and

a receiver circuit to receive the output radio signal of said transmitter circuit, said receiver circuit comprising a receiving antenna which receives the output radio signal of said transmitter circuit, a demodulator which demodulates the radio signal received by said receiving antenna, an amplifier-rectifier circuit and a modulation transistor which amplify the demodulated signal from said demodulator and rectify it into a square wave signal, a discriminator which decodes the square wave signal from said amplifier-rectifier circuit into a digital signal, a register which receives the digital digital signal from said discriminator and then provides an output signal, a speaker, a speaker starter driven by the output signal of said register to turn on said speaker, and an AC/DC power supply circuit which provides the necessary working voltage to said receiver circuit, the modulation transistor of said receiver circuit being connected to a bridging multiple switch connector for the selection of an oscillating frequency corresponding to the oscillating frequency selected through the bridging multiple switch connectors of the modulation transistor of said transmitter circuit.