Magnetic drill press with alternate power source
AssigneeBlack & Decker Inc.
InventorDaniele C. Brotto
Life of this patent
Estimating the term…
Abstract
A magnetic drill is provided with an alternate power source. The drill is comprises of: an electric motor for driving a tool; a controller configured to receive an AC input signal and operable to control a drive signal to the electric motor; an electromagnet arranged in a base of the drill housing and operable, in response to a DC voltage, to magnetically couple the base to a surface proximate to the base; an AC/DC converter configured to receive the AC input signal and operates, independent from the controller and in the presence of the AC input signal, to output a DC voltage to the electromagnet; and an alternate power source circuit that monitors the DC voltage output by the converter and, in the absence thereof, provides an alternate DC voltage to the electromagnet.
Claims13
A magnetic drill, comprising:
- a housing with a base configured to attach to a surface;
- an electric motor for driving a tool;
- a controller configured to receive an AC input signal and operable to control a drive signal to the electric motor;
- an electromagnet arranged in the base of the housing and powered by a DC voltage, to magnetically couple the base to the surface;
- a converter configured to receive the AC input signal and, independent from the controller and in the presence of the AC input signal, to output the DC voltage to the electromagnet;
- and
- an alternate power source circuit that monitors the DC voltage output by the converter and, in the absence of the DC voltage, provides an alternate DC voltage to the electromagnet, wherein the alternate power source circuit includes a battery and a detector that monitors the DC voltage output by the converter and electrically couples the battery to the electromagnet in the absence of a DC voltage output from the converter,
- wherein the controller determines a number of occurrences or an amount of time when the battery is energizing the electromagnet and generates a notification when the number of occurrences of the amount of time exceeds a predefined threshold.
A magnetic drill, comprising:
- a housing with a base configured to attach to a planar surface;
- an electromagnet arranged in the base of the housing and operable, in response to a DC voltage, to magnetically couple the base to a surface proximate to the base;
- an electric motor for driving a tool;
- a converter configured to receive an AC input signal operates, in the presence of the AC input signal, to output a DC voltage to the electromagnet;
- a controller configured to receive the DC voltage from the converter and operable to energize the electromagnet;
- and
- an alternate power source circuit that monitors the DC voltage output by the controller using a detector and, in the absence thereof, provides an alternate DC voltage to the electromagnet, where the detector is interposed between the alternate DC voltage and the electromagnet,
- wherein the controller determines a number of occurrences or an amount of time when the battery is energizing the electromagnet and generates a notification when the number of occurrences or the amount of time exceeds a predefined threshold.
Dependencies are inferred from the claim text.