.~ Set by wedge or cam at any point by drop only (e.g., tubing catcher) {2}
211
.~.~ With spring
DEFINITION
Classification: 166/211
(under subclass 209) Devices in which the stored energy of a spring is used to effect all or part of the movement of the outwardly movable means to the final position.
(1) Note. A spring used only as a friction drag does not come within the definition.