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.

[Larger plate.]

[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.

[Larger plate.]