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US Patent: 401,968
Machine for driving mandrels, keys, &c.
John Walker - Cleveland, OH
John Richards - San Francisco, CA

USPTO Classifications:
100/289, 29/251

Tool Categories:


Not known to have been produced

William G. Taylor
Alexander S. Taylor
M. C. Hamlin
E. H. Thomas

Patent Dates:
Applied: Jun. 19, 1888
Granted: Apr. 23, 1889

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Richards, London & Kelley
Of interest because Richards was an important, and itinerant, inventor of woodworking machinery.

"This invention relates to certain improvements in a machine whereby mandrels, keys, and a variety of other similar devices may be driven or forced through the hubs of wheels and pulleys, and in fact through any piece of machinery in the manipulation of which such devices are employed, by a succession of rapid blows delivered on the upper end of the mandrel or key."

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