US Patent: 2,199,491 - Friction gear transmission


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US Patent: 2,199,491

Friction gear transmission

Patentee:

David Hans Heynau (exact or similar names) - Cincinnati, OH

USPTO Classifications:

474/29, 474/37, 476/53, 476/66

Tool Categories:

industrial machines : industrial machine mechanisms : industrial machine speed and direction changing mechanisms

Assignees:

None

Manufacturer:

Master Electric Co. - Dayton, OH

Witnesses:

Unknown

Patent Dates:
Applied:	Feb. 14, 1939
Granted:	May 07, 1940

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Master Electric Co.
Photographs of Speed Ranger drive unit

Description:

Improvements to the variable-speed transmission of patent 2,032,015 to improve its rigidity and eliminate slippage. Both of these patent numbers were seen on a "Speed Ranger" variable speed motor unit from Master Electric Co., along with patent 1,950,675.