Chapter XCIX: Section 10: Crank and Eccentric Gear

(_See also p. 28._)

=1978. Hinged hand-crank.=

=1979. Joy’s patent hydraulic eccentric= for steam engine reversing gear. The centre block--keyed to the crank shaft--has two small rams working in cylinders in the sheave, and the position of the eccentric is controlled by a hand-lever and pump forcing oil into the cylinders through a channel in the crank shaft and rams.

=1980. Double eccentric,= with two diameters or throws to give alternately two different lengths of stroke to an eccentric rod.

=Shifting eccentrics.= See =Valve gear,= Section 79.

=Crank shaft governor gear.= See ditto, ditto.

=1981. Three-throw bent crank.=

=1982. Diagonal crank pin= to give a rotary reciprocating motion as well as an up and down motion to a piston or rod.

=Adjustable hand crank.= See Nos. 2570, 2265, 2523.

=Adjustable eccentrics.= See Nos. 188, 189, 190.

=Eccentric crank motion.= See Nos. 174, 175.

=1983. Eccentric variable-throw crank pin.= The pin is formed on an eccentric stock which can be revolved by a worm and wheel.

=1984. Crank motion= to give, from one crank having a regular motion, an irregular motion to a second crank or _vice versâ_. The speed of the slotted crank varies throughout its circle of revolution.