(under the class definition) Devices in which the impelling force is the action of a spring applied either directly or through a plunger or similar means to the projectile. Includes devices impelled by a spring for sliding projectiles off a smooth plate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
66+, for projecting devices in which a spring drives a plunger which creates a quantity of compressed air, in which the air is the impelling agent for the projectile.
SEE OR SEARCH CLASS
267, Spring Devices, especially
69, 70, and 71 for spring devices of general application.
