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Signaling device and method of alerting a work machine operator to a predetermined condition using same

  • US 7,508,315 B2
  • Filed: 11/09/2005
  • Issued: 03/24/2009
  • Est. Priority Date: 11/09/2005
  • Status: Expired due to Fees
First Claim
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1. A machine comprising:

  • a chassis;

    at least one steering system connected to the chassis;

    an electrical system connected to the chassis;

    a signaling device operably coupled with said electrical system and including an electrical energy storage device, an alert mechanism and a normally open electrical switch disposed between said electrical energy storage device and said alert mechanism, said electrical switch having an open/closed state based at least in part on an electrical system voltage;

    said electrical system comprises a power supply including first and second input/output lines coupled with said signaling device;

    said electrical switch comprising a biased open transistor switch having a gate/base coupled with one of said input/output lines and being configured to close upon de-coupling from said power supply;

    said electrical energy storage device comprises at least one of a battery and a capacitor;

    said electrical switch comprises a p-channel FET disposed between said electrical energy storage device and said alert mechanism; and

    at least one pre-determined condition monitor and an electronic controller in communication therewith, said electronic controller being configured to selectively de-couple said signaling device from said power supply based on a control signal or a control signal failure between said electronic controller and said at least one pre-determined condition monitor.

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