[1300]. Self-reversing gear, as applied to planing machines. The stops can be set at any required distance apart, to alter the length of travel of the machine bed. This plan requires a heavy table to carry the belt across the loose pulley to the other fast pulley.
[1301]. Reversible belt-shifting hand gear.
[1302]. Right and left hand screw reversing traverse motion. Each lever has a half nut, which can be put in gear with the screw to drive either way. See also [No. 163].
[1303]. Best form of fast and loose pulleys for open and crossed belt reversing gear, as used in [No. 1290]; the fast pulley is rather larger in diameter than the two loose ones.
[1304]. Single-belt reversing pulleys, the reverse motion on the shaft being obtained by intercepting an idle wheel A between the epicycloidal wheel B and the shaft pinion C, the middle pulley being the loose one; the idle wheel is carried by a fixed bracket and pin.
Note.—Reversible motion can be obtained direct from any steam engine fitted with reversing motion. See Valve Motions, [No. 1436], &c.
Segment Reversing Gear, [No. 724].
Section 75.—ROTARY ENGINES, PUMPS, &c.
Nearly all rotary engines can be used either as motors, pumps, blowers, or meters, and most of the following typical devices have been applied to all four purposes. Most of them are reversible by simply reversing the direction of the motor fluid.