Amplitude responsive speed-switch control

Details Amplitude responsive speed-switch control Amplitude responsive speed-switch control

G - Physics

05

B

342/16

G05B 11/01 (2006.01) G01P 1/10 (2006.01) G01P 3/46 (2006.01) G01R 19/165 (2006.01)

Patent

CA 1076234

S-Start 103 AMPLITUDE RESPONSIVE SPEED SWITCH CONTROL Abstract of the Disclosure A speed-switch control comprising a multi-pole sub-fractional permanent magnet A.C. generator driven by a shaft; the generator develops an initial A.C. signal having an amplitude representative of the shaft speed, and that signal is applied to a threshold circuit where it is rectified and compared with a threshold amplitude correlated with a critical shaft speed range to generate a D.C. switch actuation signal. The D.C. switch actuation signal actuates a solid-state switching circuit to switch a controlled load, such as a safety interlock or alarm, into and out of an external operating circuit.

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