Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Patent
1992-08-06
1993-11-02
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
335167, H01H 900
Patent
active
052587339
ABSTRACT:
Molded case circuit breaker having collapsible toggle linkage with rectangular cross section knee pin non-rotatably held within open rectangular slots in upper link, bifurcated movable contact fingers loosely guided for pivotal movement about fixed pin to break contact welds, helical compression springs biasing bifurcations against faces of a stationary connector, trapezoidal cross section shaft biasing shaft against a fixed corner of clamping strap and frame, increasing clamping force and increasing tool clearance, operating handle which changes pivot point moving to RESET position, reducing lateral force component of operating springs for reliable return of handle to OFF position, dual stops for movable contact fingers to spread impact forces along fingers, greater contact separation in poles not containing operating mechanism, slot motor laminations providing metal reinforcement to separate arc chamber housing which is cooperatively interlocked with base to distribute structural strength, terminal cover with arc vent extension angled downwardly, extended lug cover with second arc vent extension interlocked to terminal cover and arc chamber housing for no-fastener securement, trip unit armature pivoted in crested surface of molded pocket and connected to trip bar by wire bail for space-efficient location of parts, and accessory devices supported on and secured to trip unit housing have throw-away pin locking operator lever in correct position during installation.
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"Installation Instructions for Auxiliary Switch for LLB, LD, HLD, LCD, LW, HLW, LWC Circuit Breakers, Series C Molded Case Switches, and Motor Circuit Protectors (HMCP)", Westinghouse Electric Corporation, Series C, I.L.29C112, File 29-000, Effective Jul., 1989, pp. 1-4.
Larsen Michael R.
Link Donald A.
Theisen Peter J.
Wellner Edward L.
Donovan Lincoln
Eaton Corporation
Vande Zande L. G.
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