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US Patent: 422,769
Liberating valve-gear for engines
Patentee:
Noble T. Greene - Providence, RI

USPTO Classifications:
91/250, 91/260, 91/271, 91/331, 91/351

Tool Categories:
propulsion and energy : steam engines : steam engine valve gear

Assignees:
None

Manufacturer:
Providence Steam Engine Co. - Providence, RI

Witnesses:
Charles Hannigan
Albert W. Dakin

Patent Dates:
Applied: Oct. 21, 1889
Granted: Mar. 04, 1890

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Providence Steam Engine Co.

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