[D9818-F] (D-98-18) Expanding Pulley
Item set
Title
[D9818-F] (D-98-18) Expanding Pulley
Description
This folder contains correspondence and other documents regarding the technical and commercial development of an expanding pulley for variable-speed gears in motor cars. Most of the letters are by Charles M. Johnson, co-inventor of the pulley, and pertain to the patenting and marketing of the invention.
All of the documents have been selected.
Identifier
D9818-F
uri
https://edisondigital.rutgers.edu/folder/D9818-F
Type
Document File
Rights
Courtesy of Thomas Edison National Historical Park.
Is Part Of
Document File Series -- 1898
Alternative Title
(D-98-18) Expanding Pulley