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Well-Cleaning Machine.

Description: Patent for a well cleaning machine with spring activated jaws for scoops that pick up mud and leaves from the bottom of wells.
Date: September 24, 1907
Creator: Crowson, Jonas Henry
Partner: UNT Libraries Government Documents Department

Signal Valve for Boilers.

Description: Patent for a new and improved signal valve for boilers. This design "consists in the combination, with a check-valve, of the ordinary construction, which is adapted to operate in connection with an inspirator, injector, or jet-pump, such as are commonly employed for feeding steam-boilers, of a signal-valve which is located above the check-valve, and which signal-valve, when the check-valve ceases to operate, is caused to open by the backward pressure of the steam from the boiler, permitting the… more
Date: February 24, 1885
Creator: McLane, Reed Atchinson
Partner: UNT Libraries Government Documents Department
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