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US Patent: 138,139
Improvement in clutches for machinery
William B. Duckworth - Hamden, CT

USPTO Classifications:

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

Henry Smith - New Haven, CT
John McLagon - New Haven, CT

Not known to have been produced

J. H. Shumway
A. J. Tibbits

Patent Dates:
Applied: Apr. 03, 1873
Granted: Apr. 22, 1873

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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"This invention relates to an improvement in the shifting-gear for planing-machines; and it consists in two pulleys, both of which are loose upon the shaft, and with a conical-shaped chamber upon their inside, within which and upon the said shaft is a double conical-faced clutch, combined with a spring-lever through which the clutch is actuated from the platen, so that at the termination of the movement of the platen in one direction the clutch will be thrown into one pulley, and in the opposite direction will be thrown into the other pulley..."

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