[2040]. Travelling spur gear similar to last, to convey continuous motion to a travelling machine.
Hydraulic transfer. Two rotary motors (hydraulic) are used, one as driver, the other as motor, and connected together by two pipes forming the suction and delivery pipes, by which a continuous circulation is kept up, and the motor driven by the driver, the latter being driven from a shaft or engine. The pipes may be taken a great distance, if made large enough.
Section 24.—CUTTING TOOLS.
(See also [p. 64].)
[2041]. Pin borer, for cutting out circular blanks with a central hole, such as washers, &c.
[2042]. Wobbling circular saw to cut dovetail grooves.
[2043]. Expansive facing, or boring pin bit.
[2044]. Revolving cutter, with adjustable inserted circular cutter.
[2045]. Inserted circular saw teeth, easily sharpened, reset, or replaced.