Overspeed protective apparatus for a portable tool

Details Overspeed protective apparatus for a portable tool Overspeed protective apparatus for a portable tool

1980-06-18

1983-02-01

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Overspeed responsive

200 80R, 310 68E, 318 83, 318325, 318462, H02H 100

Patent

active

043719066

ABSTRACT:
Disclosed is an overspeed protective apparatus for an electric motor having pairs of stator windings normally connected in parallel, the apparatus having an actuating mechanism responsive to an overspeed condition of the motor and an electrical switching assembly normally connecting the stator windings in parallel but adapted upon actuation by the actuating mechanism to interrupt the parallel connection and connect pairs of windings in series.

REFERENCES:
patent: 411783 (1889-10-01), Card
patent: 3286150 (1966-11-01), Wilson et al.
patent: 3340452 (1967-09-01), Lindner
patent: 3510615 (1970-05-01), Stelter
patent: 3564372 (1971-02-01), Vogelsberg et al.
patent: 3860905 (1975-01-01), Guerini

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