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US Patent: 586,263
Power-shifting device for clutch mechanisms
Patentees:
Alexander Lesperance (exact or similar names) - Laconia, NH
Thomas H. Worrall (exact or similar names) - Laconia, NH

USPTO Classifications:
192/82R, 192/98

Tool Categories:
metalworking machines : metalworking machine mechanisms : metalworking power transmission
industrial machines : industrial machine mechanisms : industrial machine clutches

Assignees:
Thomas H. Worrall - Laconia, NH

Manufacturer:
American Twist Drill Co. - Laconia, NH

Witnesses:
John W. Ashman
Edgar F. Reeves

Patent Dates:
Applied: Mar. 18, 1893
Granted: Jul. 13, 1897

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for A. B. Nutting & Co.
Description:
A double-ended grinder arbor with separate clutches for each wheel is reported. It has "A. B. Nutting & Co. / Amesbury Mass. / Patent Applied For" cast into the bearing covers; a separate brass plaque says, "Am. Twist Drill Co. / Laconia, N.H. / Patented Nov 24, 91 / May 5, 96 / July 13, 97 / June 28, 98 / Oct. 30, 06"

Assignee Worrall was co-founder of the American Twist Drill Co.

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