Spring Drive Clutch
Original Publication Date: 1978-Feb-01
Included in the Prior Art Database: 2005-Feb-20
Spring clutches have a variety of uses, a conventional one being to couple a low-speed driven member to a higher-speed driven member so as to, for example, reduce the speed of the higher-speed driven member. However, the spring coupling many times causes the formerly higher-speed driven member to drop with a severe undershoot until the spring rewinds. The drawing illustrates a typical spring clutch in which a shield is added to the outside diameter of the externally energized spring clutch to allow the clutch to be used as a brake on the output member to inhibit severe undershoot.