Abstract: A multi speed transmission mechanism for use on a bicycle, for example, wherein pressure on the pedal by the operator decreases or increases the diameter of the driver sprocket wheel to alter the gear ratio correspondingly. The sprocket is provided with opposed segments which are linked to both the sprocket wheel and an inner control disc. The segments move radially outwardly or inwardly in unison responsive to limited rotation of the control disc independently of rotation of the sprocket. Such rotation is foot controlled by the operator. Pressure on the foot pedal by the operator increases or decreases the working length of the bicycle sprocket chain by making the effective diameter of the sprocket smaller or larger. This alters the gear ratio correspondingly. The gear ratio may be maintained without change by a locking device on the sprocket wheel in contact with the control disc.

Abstract: The invention is directed to a highspeed digital print-out apparatus. The apparatus involved is provided with tractors which move the paper in a first direction past a stationary print-out wheel which in conjunction with a print hammer imprints preselected indicia upon the paper. The paper is movable in the reverse or third direction, again by the tractors, to initiate a new line of indicia and in a second direction normal to said forward and reverse directions to provide spacing between adjacent lines. There is also provided a reversing mechanism for moving the paper in a fourth direction reverse to the second direction to position the paper for the start of a new sheet.

Abstract: An adapter to fit a dry cell battery of a first nominal size for use interchangeably with a dry cell battery of a second and larger nominal size, has a central passage within which the first battery is snugly received and has external dimensions resembling those of a battery of the second nominal size.

Abstract: An adapter to fit a dry cell battery of a first nominal size for use interchangeably with a dry cell battery of a second and larger nominal size, has a central passage within which the first battery is snugly received and has external dimensions resembling those of a battery of the second nominal size.