Electronic failure detection system
AssigneeOtis Elevator Company
InventorsRobert C. Boyce, Michael A. Spaner
Life of this patent
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Abstract
An electronic failure detector includes an electronic processor having processor inputs and processor outputs, a memory connected to one of the inputs, a logic circuit having logic circuit inputs and logic circuit outputs, the logic circuit inputs and logic circuit outputs being connected to others of the processor inputs, and instructions, stored within the non-volatile memory, for causing the processor to perform a logic check of the logic circuit and to generate a first signal on the processor output if said logic check is true, and to generate a second signal on the processor output if said logic check is false.
Claims5
A detector, comprising:
- an electronic processor having processor inputs and processor outputs;
- a non-volatile memory connected to one of said processor inputs;
- a logic circuit having logic circuit inputs and logic circuit outputs, said logic circuit inputs and said logic circuit outputs being connected to others of said processor inputs;
- an and gate having gate inputs, and a gate output, one of said gate inputs being connected to one of said logic circuit outputs, another of said gate inputs being connected to one of said processor outputs;
- an electronic switch having switch inputs and a switch output, one of said switch inputs being connected to said gate output, another of said switch inputs being connected to another of said processor outputs, said switch output being connected to another of said processor inputs;
- and
- instructions, stored within said non-volatile memory, for causing said processor to perform a logic check of said logic circuit and to generate a first signal on said processor outputs if said logic check is true, and to generate a second signal on said processor outputs if said logic check is false, said first signal differing from said second signal.
Dependencies are inferred from the claim text.