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Acoustic communicator for central vacuum cleaners

  • US 5,926,908 A
  • Filed: 05/05/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Fees
First Claim
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1. A method for controlling a central vacuum cleaner comprising a central machinery and a pipe system connecting said machinery to a remote working point, in which method the said machinery is activated when a particular acoustic signal is transmitted from the working point to the central machinery through the pipe system even when air is flowing through the pipe system, the method comprising the steps of:

  • a) generating a continuous acoustic signal during such time as continuous operation of the central machinery of said central vacuum cleaner is desired;

    b) transmitting said signal from the working point through the pipe system to the central machinery;

    c) detecting said signal near the central machinery; and

    d) operating the central machinery when said signal is detected, with operation ceasing when detection of said signal ceases.

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