Abstract: In a chain transmission incorporating a silent chain engaged with a sprocket, the plates of the chain are connected by sets of rocker pins extending through pin holes in the plates. The pin holes are elongated toward the center of each plate, and the elongation of each pin hole is greater than the maximum amount by which the distance between points on the respective rocker pins of each set increases when said chain is inflected to the maximum extent permitted by the sprocket in a portion of the chain in seating engagement with said sprocket.

Abstract: In a chain transmission incorporating a silent chain engaged with a sprocket, the plates of the chain are connected by sets of rocker pins extending through pin holes in the plates. The pin holes are elongated toward the center of each plate, and the elongation of each pin hole is greater than the maximum amount by which the distance between points on the respective rocker pins of each set increases when said chain is inflected to the maximum extent permitted by the sprocket in a portion of the chain in seating engagement with said sprocket.

Abstract: In a silent chain comprising interleaved and relatively pivotable rows of link plates, protrusions formed in the link plates contact relatively pivotable link plates in adjacent rows so that the area of contact is reduced. The protrusions can be annular, or they can be in the form of arcs that are of a size and position such that the arcuate protrusions of each plate do not interfere with the arcuate protrusions of an adjacent plate as the chain bends during use. The plates can have rectangular protrusions, or arcuate protrusions each consisting of an arc-shaped collection of dot-shaped protrusions.

Abstract: In a silent chain having interleaved joint link plates and guide link plates each having a pair of teeth and a pair of pin holes, the pin holes in each of the joint link plate are elongated in the direction of elongation of the chain, and extend toward each other from the two connecting pins extending through the pin holes so that a gap is formed between each of the two connecting pins and the other. The pin holes of each of the toothed guide link plates are circular pin holes. The elongation of the pin holes of the joint link plates allows the joint links to shift longitudinally with respect to the guide link plates on engagement of the chain with a sprocket, reducing clashing noise.

Abstract: In a silent chain, a flank surface which comes into contact with a sprocket tooth at the start of engagement has a partially protruding portion continuously formed along the longitudinal direction of the flank surface. Only the partially protruding portions of link plates that initially contact the sprocket teeth are positively caused to wear during running in of the chain, so that protruding portions of flank surfaces of other link plates that did not initially contact the sprocket teeth are brought into contact with the sprocket teeth.

Abstract: In a silent chain comprising interleaved and relatively pivotable rows of link plates, protrusions formed in the link plates contact relatively pivotable link plates in adjacent rows so that the area of contact is reduced. The protrusions can be annular, or they can be in the form of arcs that are of a size and position such that the arcuate protrusions of each plate do not interfere with the arcuate protrusions of an adjacent plate as the chain bends during use. The plates can have rectangular protrusions, or arcuate protrusions each consisting of an arc-shaped collection of dot-shaped protrusions.