Magnet base drill unit

Details Magnet base drill unit Magnet base drill unit

1990-05-24

1991-07-30

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With randomly-actuated stopping means

Responsive to condition of tool or tool-drive

408 11, 408 76, B23B 4514, B23B 4724

Patent

active

050355473

ABSTRACT:
A magnet base drill unit in which the driving of the drill motor and the feed motor of the magnet base drill unit is stopped by operation of the switch which operates on the instant when sliding has been produced in the magnet base drill unit, and the stopping thereof is maintained electrically or electronically. A mercury switch comprising a cylindrical body in which mercury is sealed, and a pair of contacts provided so as to project into the cavity of the cylindrical body, or a vibration switch comprising a fixed contact, and a vibration responsive contact placed by a spring means in proximity to the fixed contact is preferably used.

REFERENCES:
patent: 4261673 (1981-04-01), Hougen
patent: 4604006 (1986-08-01), Shoji et al.

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