Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1982-01-15
1984-01-24
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
200181, 335 15, H01H 8300
Patent
active
044279574
ABSTRACT:
A switch asembly includes first and second contact members which are operatively provided to take one of two positions, a break-position in which the first and second contact members are separated from each other, and a make-position in which the first and second contact members are electrically connected with each other. Magnetic members are provided operatively in association with the first and second contact members to define a closed magnetic loop with a current path extending through the loop, when the first and second contact members are turned to the make-position. The magnetic members attract each other by the magnetic flux through the closed loop to maintain the first and second contacts in the make-position when the current flowing through the current path is not zero. Thus, the first and second contact members are permitted to return to the break-position at a zero crossing point of a.c. current flowing through the contacts.
REFERENCES:
patent: 2784275 (1957-03-01), Senn
patent: 3263042 (1966-07-01), Dyer et al.
patent: 4001738 (1977-01-01), Terracol et al.
Broome Harold
Omron Tateisi Electronics Co.
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