Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1987-07-30
1988-05-31
Hix, L. T.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
337 46, 335190, H01H 7502
Patent
active
047484284
ABSTRACT:
A multi-pole circuit interrupter having a first pole unit provided with an operating mechanism and a second pole unit provided with no operating mechanism. Each of the pole units comprises a movable contact, a stationary contact, and a contact arm assembly for supporting the movable contact of the respective pole unit including a first contact arm and a second contact arm pivotally supported by a common pin. The first contact arm in the first pole unit have an elongated guide hole extending in a direction of movement of the movable contact and is directly connected to the operating mechanism. The second contact arm has an elongated hole extending substantially in a longitudinal direction thereof. A spring-biased sliding pin extends through the elongated hole and the guide hole. The guide hole of the second pole unit extends further upwards than the guide hole of the first pole unit so that the sliding pin in the first pole unit starts to slide along the pin braking surface of the guide hole only after the sliding pin in the second pole unit has left the pin breaking surface and moves on the pin sliding surface. As a result, a time delay between the resetting movements of the sliding pin along the pin braking surface of the guide hole in the first and second pole units is provided.
REFERENCES:
patent: 3492609 (1970-01-01), Murai et al.
patent: 4166988 (1979-09-01), Ciarcia et al.
patent: 4227161 (1980-10-01), Yamat et al.
Fugihisa Hiroaki
Tanibe Toshiyuki
Toda Haruhisa
Brown Brian W.
Hix L. T,.
Mitsubishi Denki & Kabushiki Kaisha
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