(under the class definition) Subject matter which utilize the force of an explosion to open the breech of a gun and eject a cartridge shell if present.
(1) Note. A new charge inserted by hand or by nonexplosion-operated means usually releases the breech-block which may then be closed.
(2) Note. If a new cartridge or charge is positioned by means operated by the explosion so that a new cycle of operation can be initiated merely by causing or permitting
the charge to be fired, the gun is considered to be "automatic" and will be classified in subclasses 125+. For further definition of "automatic" and "explosion-operated means", see the definition and notes of subclass 125.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9+, for nonautomatic machine guns.
17+, for breech closures.
27.11+, for firing devices. 37.01+, for gun mounts.
45+, for loading and ramming devices handling single charges or cartridges.
125+, for automatic guns and see (2) Note above.
SEE OR SEARCH CLASS
42, Firearms, for firearms having no explosion-operated features.
60, Power Plants,
632+, for one shot explosion-actuated expansible chamber-type motors.
