System for temporarily preserving signal-flow around a signal sw

Details System for temporarily preserving signal-flow around a signal sw System for temporarily preserving signal-flow around a signal sw

1995-06-07

1998-05-05

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

H01H 3518

Patent

active

057478953

ABSTRACT:
A system for temporarily preserving the signal-flow to a device when a signal switch has been tripped. The system includes a time-delay relay connected in parallel with the switch. When the switch is tripped, breaking the signal-flow through the switch, the time-delay relay is energized for a set period of time to maintain the signal-flow to the device. The condition which will trip the switch and the amount of time during which the time-delay relay will preserve signal-flow will vary depending upon the particular application. During the set period of time, the switch has an opportunity to recover from the condition which originally tripped the switch and resume signal flow through the switch. If the switch tripping condition persists for longer than the set period, then signal-flow to the device is interrupted after the set period of time expires. The system minimizes unnecessary interruptions in signal-flow when the switch has been accidentally or unintentionally tripped.

REFERENCES:
patent: 3651371 (1972-03-01), Tingley
patent: 4040042 (1977-08-01), Mayer
patent: 4251845 (1981-02-01), Hancock
patent: 4438472 (1984-03-01), Woodworth
patent: 5467245 (1995-11-01), Newbould

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