Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1988-07-11
1990-12-04
Scott, J. R.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
335 17, 335 76, H01H 7104, H01H 1312
Patent
active
049756737
ABSTRACT:
An apparatus for electrically operating a circuit breaker comprising a trip display mechanism for displaying trip condition of the circuit breaker while the circuit breaker is in trip state thereof. The trip display mechanism comprises an elongate trip detecting plate which is supported pivotally at intermediate point thereof on a slider and engages at its one tip end with the handle of the circuit breaker which causes the trip detecting plate to pivot during the trip condition; and an elongate trip display plate having an indicia indicative of the trip condition of the circuit breaker at one end thereof, the display plate being swingably supported at intermediate point thereof on a frame and engaging with the other end of the trip detecting plate, the trip display plate being caused by the trip detecting plate to swing to a position where the indicia appears on a display window during the trip condition of the circuit breaker.
REFERENCES:
patent: 3227831 (1966-01-01), Jacks et al.
patent: 3296565 (1967-01-01), Kiesel et al.
patent: 4644122 (1987-02-01), Farley et al.
Ikehata Yoji
Onoda Tadayoshi
Takahashi Ken'ichi
Mitsubishi Denki & Kabushiki Kaisha
Scott J. R.
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