公开(公告)号：CA1212912A

公开(公告)日：1986-10-21

申请号：CA461013

申请日：1984-08-14

Applicant: IBM

Inventor： ALEXANDER DOUGLAS E ,  HOLLAND JAMES F ,  LEONARD HERBERT G ,  REED ALVIN R

IPC: F16D41/18 ,  F16D59/00 ,  F16D13/12

Abstract: BUCKLING CLUTCH A mechanical torque transmitting apparatus such as a one-way clutch which includes two distinct sets of flexural arms (primary and auxiliary) and a cylindrical engagement surface. The primary flexural arm is adapted to be in edgewise continuous engagement with the cylindrical surface. Preferably, the primary flexural arm has a long, straight, narrow cross-section area and applies a relatively low force against the cylindrical surface when said surface is rotating in a free-wheeling direction. In the non free-wheeling direction, the force against the cylindrical surface increases until the rotational forces overcome and buckle the primary flexural arm whereupon the auxiliary flexural arm is brought into contact with the cylindrical surface to resist further rotation.

公开(公告)号：CA1109045A

公开(公告)日：1981-09-15

申请号：CA339703

申请日：1979-11-13

Applicant: IBM

Inventor： SIENKIEWICZ GERALD C ,  MCQUADE DONALD J ,  LEONARD HERBERT G

IPC: G11B23/07 ,  B41J32/02 ,  B41J33/10 ,  B65H18/12 ,  B65H20/26 ,  B65H17/48

Abstract: IMPROVED ENDLESS RIBBON CARTRIDGE A freely rotatable spool having an endless loop of printer ribbon wound around it is disclosed. The ribbon is withdrawn from the inner periphery of the coil and is simultaneously wound onto the outer periphery of the coil in a known manner. The freely rotatable spool is driven by the forces applied through pulling the ribbon off the inner periphery. Ribbon pulling is performed by an external set of feed rollers or similar mechanism. Difficulties encountered with the use of fabric ribbons in endless reel configurations are eliminated in the present invention by an improvement in the form of a polygonally shaped flange on the upper side of the freely rotatable spool on which the ribbon is wound. The flat sides on the polygonal flange have an optimum length which is defined in relationship to the width of the ribbon and the cosine of the angle at which the ribbon is withdrawn from the spool. An undercut dimension is provided on the spool so that the inner periphery of the ribbon is not in too great a contact with the hub or central core of the spool. A smooth ribbon flow from the vertical plane on the RA9-78-004 inner periphery of the coil to the horizontal plane as the ribbon is pulled from the center of the coil and out through the cassette is obtained. RA9-78-004