Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1994-02-14
1995-02-21
Donovan, Lincoln
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 91, H01H 5134
Patent
active
053920210
ABSTRACT:
An electromagnetic multi-stage switch composed of a lower and an upper support seats, an electromagnetic coil, a rotary shaft, a restoring spring and a driving iron plate. A shaft member is fixedly disposed between the upper and lower support seats and a rotary shaft is axially movably fitted around the shaft member to axially move between the upper and lower support seats. The upper and lower support seats and rotary shaft are formed with corresponding driving teeth and engaging teeth. The rotary shaft has an outward extending flange-like insulative rotary disk formed with several through holes, whereby when the electromagnetic coil is energized, the same attracts the driving iron plate downward to drive the rotary shaft, and the driving teeth guide the rotary shaft to rotate the rotary disk, making an input contact contact with an output contact through the holes of the rotary disk so as to close a circuit, while when the electromagnetic coil is disenergized, the driving iron plate is restored to its original position by the restoring spring to open the circuit. The electromagnetic coil is repeatedly energized and disenergized for obtaining different patterns of electric output.
REFERENCES:
patent: 2614187 (1952-10-01), Dorothea
patent: 4549154 (1985-10-01), Thoma
Donovan Lincoln
Freiburger Thomas M.
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