US Patent: 533,388
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Register-valve
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Patentee:
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Henry Bolthoff (exact or similar names) - Denver, CO |
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Patent Dates:
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Applied: |
Jun. 25, 1894 |
Granted: |
Jan. 29, 1895 |
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Jeff Joslin Vintage Machinery entry for Hendrie & Bolthoff Mfg. & Supply Co.
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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." |
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