Electrically driven hand-operated tool
First Claim
1. An electrically driven hand-operated tool comprising a housing defining a handle and, within said housing, a driving electromotor and means for presetting and adjusting a plurality of modes of operation of said electromotor, said means including a plurality of control switches having their respective control elements arranged in a regular array located on a surface portion of said housing opposite said handle.
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Accused Products
Abstract
The electrically driven hand tool such as hand-operated drilling, milling or sawing machine includes a universal driving electromotor controlled via electric circuits by means of a plurality of switches, the control elements of which are in the form of pushbuttons arranged in a matrix or rectangular array on the top surface of the tool housing. The pushbuttons are illuminated when actuated and include a digital keyboard connected to a microprocessor to enter digital data corresponding to the desired value of speed or torque, and the microprocessor adjusts, via a power circuit, the electromotor to the entered data.
121 Citations
7 Claims
- 1. An electrically driven hand-operated tool comprising a housing defining a handle and, within said housing, a driving electromotor and means for presetting and adjusting a plurality of modes of operation of said electromotor, said means including a plurality of control switches having their respective control elements arranged in a regular array located on a surface portion of said housing opposite said handle.
- 3. An arrangement of an electrically driven hand-held tool comprising a housing defining a handle and, within said housing, a driving electric motor, switching and controlling means including a microprocessor, said means having a plurality of input lines and an output line, power control means connected between said electric motor and said output line, said switching and controlling means controlling different operational variables of said electric motor in response to activation of corresponding input lines, a part of said input lines controlling the selection of operational variables to be controlled and another part of said input lines controlling digital values of the selected operational variables, a plurality of control elements for activating said input lines, said control elements being arranged in a regular array on a top surface portion of said housing opposite said handle, and said switching and controlling means being preset to deliver a control signal at said output line when a control element pertaining to an operational variable and control elements pertaining to a digital value are actuated.
Specification