| 摘要 |
<p>997,131. Sawing. SINGER CO. Sept. 19, 1963 [Oct. 17, 1962], No. 36854/63. Heading B5L. [Also in Division H2] A variable speed portable power saw powered by an electric motor having a built in speedresponsive regulating circuit with external means for setting the speed has an apertured end-cover 15, an insulated circuit-board 28 mounting the electrical components providing the speed-responsive regulation, and a threeposition selector switch 52 carrying an insulated knob 53 passing through an aperture in the end-cover 15 for external manipulation (see Division H2). An adjustable pot resistor 48 has a screw-driver slot for calibration of the bar speed setting.</p> |
