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US Patent: 141,302
Improvement in water-regulators for boilers
Patentee: Calvin J. Weld (exact or similar names) - Brattleboro, VT USPTO Classifications: 137/428, 137/433 Tool Categories: propulsion and energy : steam apparatus : stationary boilers Assignees: None Manufacturer: Not known to have been produced Witnesses: C. F. Thompson S. E. Howard	Patent Dates: Applied: Feb. 15, 1873 Granted: Jul. 29, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Calvin J. Weld

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