Motor overload safety device

Details Motor overload safety device Motor overload safety device

1980-03-21

1982-03-16

Truhe, J. V.

Electrical generator or motor structure

Dynamoelectric

Rotary

200 6146, 308189R, 318475, 340671, H02K 1100

Patent

active

043203175

ABSTRACT:
A rotor of a motor has a bearing mounted thereon, the bearing having a tab which is urged in one direction by the fluid friction of the lubricant in the bearing, the tab being urged against a spring, the tab actuating a micro-switch. The force exerted by the tab on the spring is a function of the rotor speed. Upon reduction of rotor speed the spring urges the tab rearwardly so that the micro-switch open circuits in turn disconnecting power from the motor which comes to a standstill.

REFERENCES:
patent: 2526373 (1950-10-01), Le Clair
patent: 2747699 (1956-05-01), Lucien

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