B - Operations – Transporting – 23 – Q
Patent
B - Operations, Transporting
23
Q
317/26
B23Q 9/02 (2006.01) B25H 1/00 (2006.01)
Patent
CA 1263434
MAGNETIC BASE MACHINE TOOL ABSTRACT OF THE DISCLOSURE A magnetic base drilling machine includes a base having a magnet coil therein and a motor assembly mounted on the base for driving a rotary cutting tool. Electrical circuitry, including switches for applying power to the magnet coil, for reversing the direction of current to the magnet coil, and for controlling the current to the motor are provided for controlling the magnet coil and motor. A user-manipulatable control handle includes a multi-function control cam having cam surfaces that selectively control the switch that applies power to the magnet coil and which physically blocks operation of the motor switch until the magnet coil is energized. Conversely, the magnet coil cannot be de-energized until the motor switch is moved to its off position. If desired, the direction of the electrical current applied to the magnet coil can be reversed to assist in removing the base from a magnetized work surface. A pointed stabilizer pin is controlled by the control cam to mechanically engage and disengage a work surface as the magnet coil is energized and de-energized.
495981
Black & Decker Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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