Marvin Duane Schirmer

US Patent:

40360849, Jul 19, 1977

Filed:

Aug 25, 1976

Appl. No.:

5/717536

Inventors:

Marvin D. Schirmer - Florence OR

International Classification:

G04D 300
B23P 1904

US Classification:

81 75

Abstract:

A support frame carries a rotary clock spring winding shaft having a reversible locking means. A set of variably sized spring retaining sleeves are provided and are selectively placed on the winding shaft according to the size of the clock spring barrel. A parallel stationary shaft on the support frame mounts a group of adjustable spring end holding elements which cooperate with the winding shaft during the winding up or unwinding of the clock spring. The apparatus effects removal and replacement of the clock spring in its barrel or retainer in a very simple manner without injuring the spring or the hands of the manipulator.