Phase-failure detectors responsive to unequal bending of bi-meta

Details Phase-failure detectors responsive to unequal bending of bi-meta Phase-failure detectors responsive to unequal bending of bi-meta

1990-04-02

1991-12-31

Shoop, Jr., William

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

340635, 250229, H02H 326

Patent

active

050776266

ABSTRACT:
Circuit breakers can be used to replace fuses in plant comprising centrifuge machines driven by small three-phase electric motors. The circuit breakers incorporate three bi-metal strips which bend due to the heat produced by current flow. Loss of current in one phase results in unequal bending of these trips. In one arrangement, a light-emitting diode 5 fitted to a first strip 2 produced light to pass through an aperture 8 in a plate 7 on the second strip 3 to fall on a photo-sensitive detector 6 on the third strip 4. Any unequal bending causes the light to be cut-off and the resulting signal can be used to trip the circuit breaker. In some cases the strips are the strips in the circuit breaker.

REFERENCES:
patent: 3949219 (1976-04-01), Crouse
patent: 4379968 (1983-04-01), Ely et al.
patent: 4475098 (1984-10-01), Hoffmann et al.
patent: 4692612 (1987-09-01), Havel
patent: 4723190 (1988-02-01), Chung
patent: 4831253 (1989-05-01), Omura et al.
patent: 4979069 (1990-12-01), Simpson

Affiliated with

Also associated with

Rating

Phase-failure detectors responsive to unequal bending of bi-meta does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase-failure detectors responsive to unequal bending of bi-meta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-failure detectors responsive to unequal bending of bi-meta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1513882