.~ With simple rectilinear reciprocating motion only {13}
617
.~.~ Means to vary force on, or speed of, tool during stroke
DEFINITION
Classification: 83/617
(under subclass 613) Apparatus wherein means are provided to accelerate or decelerate the tool and/or change the impetus of the actuating means on the tool during a stroke.
(1) Note. To be placed in this subclass, a patent must have the disclosed purpose of changing the force or speed of the tool. Those devices having mechanical drives which would inherently change the force or speed of a tool in its stroke, but which are silent as to such change of force or speed, are placed in the respective structural subclasses. See subclasses 624+ and 627+.
