Chapter CLI: Section 88: Variable Motion and Power

(_See also p. 194._)

=2511. Variable belt drive= by elliptic pulley.

=2512. Variable drive= by an intermediate friction wheel, and two friction cones at right angles.

=2513. The same device applied to two discs= running in opposite directions on the same axis.

=2514. Variable drive= by a ~V~ belt running between cone discs, the space between which can be varied by a hand lever or screw motion.

=2515. Variable compensation weight= and parallel motion for steam engines, by M. N. Forney, New York, 1893.

=2516. Variable cone driving.= Evans’ variable friction gear; a loose leather band, with a traversing motion by hand screw, forms the gripping medium between the cones.

=2517. Variable radius lever,= operated by a crank motion to give variable angular reciprocating motion to a shaft.

=2518. Variable crank pin= adjusted by a sector and bolt.

=2519. Variable crank pin= adjusted by a transverse screw.

=2520. Variable driving friction gear= to give a variable speed to the bevil-wheel shaft ~A~ by varying the position of the friction pinions as regards the disc ~B~.

=2521. Variable adjustment for a spiral spring.=

=2522. Adjustable centre-piece or bearing= for a spindle or rod.

=2523. Variable radius hand crank.=

=2524. Variable throw crank pin.=

=2525. Variable motion= taken from a revolving cylinder or shaft by a friction wheel, whose angle can be varied.

=2526. Similar motion= taken from a revolving disc.