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US Patent: 489,224
Tapping-machine
Patentee:
William W. Doolittle - Chicago, IL

USPTO Classifications:
408/38, 409/903

Tool Categories:
metalworking machines : drilling and boring : tapping machines

Assignees:
Crane Co. - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
Aloysia Helmich
H. D. Hollister

Patent Dates:
Applied: Jul. 16, 1892
Granted: Jan. 03, 1893

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Crane Co.
Description:
The assignee manufactured steam engines. So far as we can tell, this tapping machine was for their own use and was not manufactured for sale.

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