Shaft lock arrangement for a power tool

Details Shaft lock arrangement for a power tool Shaft lock arrangement for a power tool

1991-09-23

1993-03-09

Shoap, Allan N.

Electricity: circuit makers and breakers

Switch activation inhibitor

Actuator locking device

200 4313, 200 4316, 200 4319, 200322, 200334, 409182, 144134D, 144136G, 279150, 408710, H01H 928, B27C 500

Patent

active

051919680

ABSTRACT:
A router including an arrangement for locking the shaft against rotation and preventing power from being supplied to the motor when the shaft is locked. The shaft is locked by movement of a lock bar which traps a flatted portion of the shaft in an appropriately dimensioned slot. A secondary switch in the power path to the motor is controlled by movement of the lock bar. In addition, an indicator lamp connected to the secondary switch is lit when the shaft is locked and the router is still connected to a source of power.

REFERENCES:
patent: 2702098 (1955-02-01), Staak
patent: 2897302 (1959-07-01), Godfrey et al.
patent: 3487747 (1970-01-01), Burrows et al.
patent: 3587387 (1971-06-01), Burrows
patent: 3612787 (1971-10-01), Hlavsa
patent: 4244406 (1981-01-01), Stielper
patent: 4386879 (1983-06-01), Martinmaas

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