. American engineer and railroad journal . as it is arranged for directcurrent. This tool is also the No. 1 Bick-ford radial, and is equipped with a constant - speed direct-currentmotor, mounted on an extension of thebase. The diive is tluough a silent chainto the sprocket on the speed box, which inthis case is the weU-known maindriving mechanism which is used on theBickford drills—this device was fully de-scribed on pages 178 and 179 of our May,1903, issue. By means of this mechanismand the 4-speed back gear on the rear of thearm, 16 speeds are available at the spindle.
. American engineer and railroad journal . as it is arranged for directcurrent. This tool is also the No. 1 Bick-ford radial, and is equipped with a constant - speed direct-currentmotor, mounted on an extension of thebase. The diive is tluough a silent chainto the sprocket on the speed box, which inthis case is the weU-known maindriving mechanism which is used on theBickford drills—this device was fully de-scribed on pages 178 and 179 of our May,1903, issue. By means of this mechanismand the 4-speed back gear on the rear of thearm, 16 speeds are available at the may be noted from the engraving, inthis drive the motor starting box is locatedon the tool between the motor and speedbox, making the tool and its drive entirelyself-contained and capable of portable usein a shop. silent On page 381 is illustrated the style Edrive of the Bickford Drill & Tool Co. This is stated to be their cheapest and best method of variable-speeddriving, as the motor speeds are varied by field control, which is.
Size: 1544px × 1619px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
