Redundant control relay circuits

Details Redundant control relay circuits Redundant control relay circuits

1996-01-03

1997-11-18

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361166, 361192, 307140, 307328, 192129A, H01H 4700

Patent

active

056893981

ABSTRACT:
Improved redundant relay control circuits are set forth which prevent a load from being energized when any relay coil or contact or stop or start switch contact fails. A first circuit embodiment sets forth a plurality of branches with a cross-monitoring interconnection between a start branch and one of the two other circuit branches. The interconnection prevents a load from being energized when a start switch welds. Second and third circuit embodiments are configured such that the redundant control relay circuit remains inoperative until a fault is cleared although the main power across the circuit is temporarily removed. A fourth circuit embodiment operates independent of relay contact timing.

REFERENCES:
patent: 3213330 (1965-10-01), Teller
patent: 3493780 (1970-02-01), Wiggs et al.
patent: 3534844 (1970-10-01), Freeland
patent: 4185208 (1980-01-01), McMillen, Jr. et al.

Affiliated with

Also associated with

Rating

Redundant control relay circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Redundant control relay circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redundant control relay circuits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1570061