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US Patent: 143,574
Dead-Lights for Steam-Boilers
Patentee: John C. Hoadley (exact or similar names) - Lawrence, Essex County, MA USPTO Classifications: 220/663 Tool Categories: propulsion and energy : steam apparatus : low water alarms Assignees: None Manufacturer: J. C. Hoadley Co. - Lawrence, Essex County, MA George G. Mc Lauthlin & Co. - Boston, Suffolk County, MA Witnesses: Unknown	Patent Dates: Applied: Jul. 19, 1873 Granted: Oct. 14, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for J. C. Hoadley Co. "Vintage Machinery" entry for George G. Mc Lauthlin & Co.

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