Amplitude responsive speed switch control

Details Amplitude responsive speed switch control Amplitude responsive speed switch control

1976-10-15

1978-04-25

Goldberg, Gerald

Electricity: electrical systems and devices

Electrical speed signal processing systems

With speed analog electrical signal

361241, H02P 500

Patent

active

040866475

ABSTRACT:
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.

REFERENCES:
patent: 3178612 (1965-04-01), Kerr
patent: 3324378 (1967-06-01), Kupferberg et al.
patent: 3629623 (1971-12-01), Sakurai et al.
patent: 3710186 (1973-01-01), Sharp
patent: 3860843 (1975-01-01), Kawasaki et al.
patent: 3862432 (1975-01-01), Larson
patent: 4013904 (1977-03-01), Chick
patent: 4025810 (1977-05-01), Field

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