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Thread: Invisible Faucet Rays

  1. #1

    Default Invisible Faucet Rays

    Ever hear of this?

    Title:
    ELECTRONIC AUTOMATIC FAUCET DEVICE

    Document Type and Number:
    United States Patent 3799198



    Abstract:
    An electronic automatic faucet device wherein an emitting element of visible or invisible rays, a receiving element for said rays, and a magnet valve are provided for the faucet of a water conduit, wherein the beam path between both the elements is momentarily intercepted, that is, the beam is shut for a short time and the original irradiating state is immediately recovered, thereby to energize the magnet valve into the water feeding state. When the beam path is subsequently intercepted for a moment, the magnet valve is deenergized into the water stopping state. Furthermore, simultaneously with initiation of the water feeding state, a timer circuit starts so as to automatically change said water feeding state to the water stopping state when a predetermined period of time has elapsed.

    http://www.freepatentsonline.com/3799198.html

  2. #2
    Illinois Licensed Plumber SewerRatz's Avatar
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    Nov 2008
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    Default

    Its a twist on Sloans original patent for the Optima hands free facuets.

    http://www.sloanvalve.com/index_2450_ENU_HTML.htm

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Aug 2004
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    Cave Creek, Arizona
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    25,615

    Default beam

    THey were using photocell beams in the 70's to activate faucets, but as stated they needed an emitter and a receiver to operate. The new ones combine everything into a single unit.

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