Reversible single revolution clutch

Claim 1

A single revolution clutch of type employed for transmitting motion through uniform angular increments comprising: a motion input hub element, a motion output hub element, an interconnecting clutch element, and an actuating sleeve element; said input hub element including a hollow cylindrical sleeve member having a cut out segment therein defining a pair of opposed parallel edges; said output element including a second sleeve positioned within said first sleeve; said clutch element including a contractile coil spring surrounding said second sleeve and having first and second oppositely disposed terminals, first and second actuating rings each having a radially-extending projecting thereon engaged with said first and second terminals of said spring, said projections being positioned between said pair of opposed parallel edges, whereby rotational motion in either direction imparted to said input hub element will be transmitted through one of said projections to result in the tightening of the convolutions of said coil spring upon said second sleeve, and the transmission of motion to said output hub element; said actuating sleeve element surrounding said coil spring and having inner and outer generally cylindrical surfaces, said outer surface having a direction-oriented notch for selective engagement by a pivotally mounted lug to prevent rotation in a given direction, said inner surface having an axially arranged groove and a radially inwardly directed transversely extending rib selectively contacting either of said projections to result in opening of the convolutions of said spring to interrupt transmission of motion between said input and output hubs upon the prevention of rotation of said actuating sleeve element, and the continued rotation of saiid input hub element; said sleeve element being selectively repositionable, end for end, upon said spring to position said notch for operation in either of two opposite rotational directions.