Electric relay having multiple operational thresholds

Details Electric relay having multiple operational thresholds Electric relay having multiple operational thresholds

1978-06-22

1980-09-23

Braun, Fred L.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Vacuum or hermetically sealed type

335208, H01H 166, H01H 3732

Patent

active

042245885

ABSTRACT:
Electric relay comprising flexible-blade switches having multiple operational thresholds. In this relay, the most sensitive switches are within the coil whereas the least sensitive switches are located outside the coil, the magnetic circuit being directed toward the outside switches by the use of magnetic flux detectors. Moreover, the operational thresholds of the switches are adjustable by the use of magnetic shunts disposed in the coil and in the flux detectors, one of the shunts being constituted by a material chosen for its Curie point.

REFERENCES:
patent: 3204059 (1965-08-01), Saaty
patent: 3283273 (1966-11-01), Pearse
patent: 3522562 (1970-08-01), Schon et al.
patent: 3812441 (1974-05-01), Sakamoto et al.

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