US Patent: 533,388 - Register-valve


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US Patent: 533,388

Patentee:

Henry Bolthoff (exact or similar names) - Denver, CO

USPTO Classifications:

137/625.31, 251/170, 251/281, 251/286

Tool Categories:

propulsion and energy : steam apparatus : stationary boilers : steam valves

propulsion and energy : steam apparatus : steam valves

Assignees:

None

Manufacturer:

Hendrie & Bolthoff Manufacturing & Supply CO. - Denver, CO

Witnesses:

G. J. Rollandet

Charles E. Dawson

Patent Dates:
Applied:	Jun. 25, 1894
Granted:	Jan. 29, 1895

Patent Pictures:

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Vintage Machinery entry for Hendrie & Bolthoff Mfg. & Supply Co.

Description:

Seen in an 1898 Hendrie & Bolthoff catalog, "Our Double Cylinder Quadruple Friction Hoist. The fixtures comprise steam pipes as shown in cut, patent balanced throttle valve, oil cups, nickel-plated double sight-feed lubricator, oil cans, set steel forged wrenches and foundation bolt ends."