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US Patent: 6,324
Piston-valve cut-off
Patentee:
Gordon McKay - Pittsfield, MA

USPTO Classifications:
83/231, 91/259

Tool Categories:
propulsion and energy : steam engines : steam check valves

Assignees:
None

Manufacturer:
McKay & Hoadley - Pittsfield, MA

Witnesses:
T. A. Sedgwick
James W. Gowan

Patent Dates:
Granted: Apr. 17, 1849

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for McKay & Hoadley

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