Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent
1991-04-08
1993-02-02
Skudy, R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
337 3, H02H 504, H02H 708
Patent
active
051842696
ABSTRACT:
An overload protective device to the disposed in an electric circuit serving to supply current to a load has a pair of fixed contacts provided inside of a case and an inversible disk-like bimetal of a curved shape having a pair of movable contacts capable of coming in contact with the fixed contacts, respectively. A shaft is fixed to the case at one end thereof and formed with a head portion at the free end portion. The shaft extends though a hole formed in the central portion of the bimetal. When the bimetal breaks, a circuit breaker breaks the electric circuit permanently to thereby prevent the load and the overload protective device from being burnt out.
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Kawaminami Shigeya
Kobayashi Morio
Shimada Toshio
Tada Takemi
Hitachi , Ltd.
Skudy R.
To Ed
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