Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1978-04-28
1980-07-22
Braun, Fred L.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335 35, 335 39, 337 66, H01H 7348, H01H 7500, H01H 7700
Patent
active
042142199
ABSTRACT:
A switch which is opened and closed by successively depressing a manual operating handle is provided with one spring for separating the switch contacts and a separate spring for closing the switch contacts. Interrupting capacity is improved without increasing overall size by utilizing a J-shaped movable contact arm mounted on a pivot located a substantial distance from the movable contact. The closing spring is located adjacent to the arcing or interrupter area. A metal shield is positioned to protect the closing spring from hot arcing gases as they exit from the interrupter area. The speed of instantaneous or magnetic tripping is improved by providing the magnet coil with at least one complete current carrying loop.
REFERENCES:
patent: 2611052 (1952-09-01), Platz et al.
patent: 3075058 (1963-01-01), Platz et al.
patent: 3193643 (1965-07-01), Hollyday
DiMarco Bernard
Hempstead John C.
Braun Fred L.
Gould Inc.
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