The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

(See also [p. 198].)

[2527]. Slide valve ports, with gradual cut-off.

[2528]. Piston valve in section. See [No. 1654]. This construction avoids spring rings, which do not run well across the ports, the entire valve being sprung into the bore.

[2529]. Tube air valve. Can be made to open and shut by revolving, or by longitudinal motion.

[2530]. Corliss valve, with rectangular rocking spindle.

[2531]. Flume valve for water.

[2532]. Double cone valve for steam or water, closes the leakage round the screw when opened, and requires no packing.

[2533]. Double ported slide valve.

[2534]. Cone plug and rubber ring for plugging a pipe.

[2535]. Reversing valve for gas or air blast.