Bell + Howell Company

J Clyde Norton

Herbert Karsh

The manufacture of a tachometer of a type having annularly arranged tachometer markings on a rotary tachometer device includes the steps of rotating the tachometer device. A signal is generated having recurring signal portions for providing tachometer markings upon recordation on the rotary tachometer device. The number of signal portions occurring in the latter signal durin a revolution of the rotating tachometer device is adapted to a whole number of tachometer markings accommodable on the tachometer device in a continuous circular array. The signal having the mentioned adapted number of signal portions is recorded onto the rotating tachometer device to provide the tachometer markings in a continuous circular array.

Growing community of inventors

Van Nuys, CA, United States of America

J Clyde Norton