. American engineer and railroad journal . s tool is arrangement of thedrive. The motor, which is an enclosed constant-speed, direct-current machine, is located under the forked brace, on an ex-tension of the base, with the main switch and starting box lo-cated conveniently near. It drives the small countershaftabove it either through a direct belt for forward motion, orthrough a geared pulley and direct belt for reverse motion, asis clearly shown in the engraving. Both of these belts operatewith the motor, either one being thrown in action at will by thefriction clutch having a handle extendi
. American engineer and railroad journal . s tool is arrangement of thedrive. The motor, which is an enclosed constant-speed, direct-current machine, is located under the forked brace, on an ex-tension of the base, with the main switch and starting box lo-cated conveniently near. It drives the small countershaftabove it either through a direct belt for forward motion, orthrough a geared pulley and direct belt for reverse motion, asis clearly shown in the engraving. Both of these belts operatewith the motor, either one being thrown in action at will by thefriction clutch having a handle extending out over the arrangement is very commendable, as it obviates thenecessity of using crossed-belts, with their attendant disad-vantages, for the reverse motion. It is a very convenientmethod of driving with a constant-speed motor also, as thefriction-clutch drive enables the drill spindle to be started ancistopped instantly without waiting for the motor to come torest. The two engravings presented upon this page illustrate the.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
