Screw stopper. See [No. 2544].
[2461]. Slotted nut and set pin for fine adjustment, or for taking up wear.
Lock nuts; usually two nuts are employed, the thickest one outermost. There are many forms of patent nuts designed to prevent loosening by vibration.
Nuts can be cast around a screw in white metal or brass.
Section 79.—SLIDE AND OTHER VALVE GEAR.
(See also [p. 172].)
[2462]. Cut-off gear. Two cut-off valves similar to [No. 1456], regulated by an external hand wheel forming the valve spindle guide bush.
[2463]. Duplex motion for a valve, to operate it by either rod, using the other as a fulcrum.
