Stenograph Corporation

Ralph E Zum Bahlen

Richard A Michals

Frank H Mozer

Paul J Fowler

A shorthand machine including an electric drive system to advance the platen. In accordance with the invention, the platen can be advanced in a fully mechanical, conventional mode, fully electric mode, or by a combination of electric and mechanical drives. In the electric or electric/mechanical modes, after the shorthand machine operator makes a key stroke and releases the keys, an electric circuit pulses an electric motor connected to the platen to drive the platen for a predetermined duration of time. Subsequent to the driving pulse, power to the motor is reversed to quickly brake the motor and bring it to a rapid stop. The duration of time that the motor is activated may be varied, varying the amount of advancement of the platen, and thus varying the distance between recorded key strokes for each word or part of word generated by the operator of the shorthand machine.

Shorthand machine having electric platen advancement

A shorthand machine including an electric drive system to advance the platen. In accordance with the invention, the platen can be advanced in a fully mechanical, conventional mode, fully electric mode, or by a combination of electric and mechanical drives. In the electric or electric/mechanical modes, after the shorthand machine operator makes a key stroke and releases the keys, an electric circuit pulses an electric motor connected to the platen to drive the platen for a predetermined duration of time. Subsequent to the driving pulse, power to the motor is reversed to quickly brake the motor and bring it to a rapid stop. The duration of time that the motor is activated may be varied, varying the amount of advancement of the platen, and thus varying the distance between received key strokes for each word or part of word generated by the operator of the shorthand machine.

A paper gauge for use with a shorthand machine to determine the quantity of paper remaining in the shorthand machine. A scale arm weighs the paper tape in the machine and the gauge is calibrated by weight to give the shorthand machine operator a reading in terms of the number of folds left in the paper strip. The displacement of the scale arm is proportional to the weight of the paper tape and movement of the paper gauge indicating means is proportional to displacement of the scale arm. Accurate readings are facilitated by the use of a hinged tray plate to hold the paper tape in correct position on the scale arm. An 'L'-shaped end portion of the tray plate in hinged engagement with the base portion of the tray plate successfully prevents the used portion of the paper tape from urging against the remaining supply and thereby causing an inaccurate reading.

Growing community of inventors

Chicago, IL, United States of America

Ralph E Zum Bahlen