Boots – shoes – and leggings
Patent
1985-05-09
1988-06-21
Smith, Jerry
Boots, shoes, and leggings
371 36, G06F 1100
Patent
active
047528699
ABSTRACT:
Redundant trip logic microprocessors produce partial trip signals which are voted on by a pair of voters at the power interface to the actuated devices. The logic implemented by each trip logic processor is straight-forward and can be designed for each individual plant. Also included is an automatic tester and testing method which can confirm the accuracy of A/D converters, digital inputs, check the trip points of bistable, verify all the trip and voting logic, and measure the time response of each channel. The test subsystem uses a microcomputer to control the isolation of the analog field sensor signals and digital contact signals from the analog and digital inputs, control the generation and/or injection of various combinations of reference and test signals, and monitor the response of the trip logic processors and voter to the test signals.
REFERENCES:
patent: 3538498 (1970-11-01), Games
patent: 3697776 (1972-10-01), Matejka
patent: 3892954 (1975-07-01), Neuer
patent: 4180203 (1979-12-01), Masters
Miller William L.
Sutherland James F.
Abeles Daniel C.
MacDonald Allen
Smith Jerry
Westinghouse Electric Corp.
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