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US Patent: 1,415,515
Change Gear Mechanism
Patentee:
Constant Bouillon - Torrington, CT

USPTO Classifications:
74/331, 74/342

Tool Categories:
metalworking machines : metalworking machine mechanisms

Assignees:
Hendey Machine Co. - Torrington, CT

Manufacturer:
Not known to have been produced

Witnesses:
C. F. Wesson

Patent Dates:
Applied: Aug. 11, 1920
Granted: May 09, 1922

Patent Pictures:
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endey Machine Co. History
"Vintage Machinery" entry for Hendey Machine Co.
Description:
Southgate & Southgate - patent attorneys

Abstract:

This invention relates to change gear mechanism designed for use in lathes, drills and other machine tools, in which a wide range of working speeds is desired.

It is the object of my invention to provide a mechanism of this character by which a large number of speed changes may be maintained by means of a relatively small number of change gears, and by the use of simple and reliable controlling devices.

In the preferred form, I mount the gears upon three parallel shafts and control their positions by means of two hand shift levers.

By using three gears on each shaft, I obtain nine different speed ratios between the driving and the driven shafts.

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