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Process of Mining Sulfur.

Description: Patent for innovations in the underground fusion or Frasch process of mining sulfur, "which comprises conducting an appropriate fusing medium [such as hot water] into the formation containing the sulfur deposit and thereby melting the sulfur" (lines 91-95). Central to the innovations is the use of a compressed gas to "eliminate or largely reduce heat losses in porous rock and exhausted sulfur regions at the higher levels of the mine where the presence of the hot water is of no benefit so far as… more
Date: December 27, 1921
Creator: Drachenberg, August Toby
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Pump.

Description: Patent for "a pump that is simple, durable, and efiicient, which can be manufactured at a comparatively small cost, and which can be readily cleaned and repaired. It consists, preferably, in a double-cylinder pump that is adapted to operate by a direct lift without a valve in the plunger" (lines 8-15).
Date: September 27, 1892
Creator: Tom, Joseph C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Scraper.

Description: Patent for a scraper for floors and walls that attaches to a broom handle.
Date: February 27, 1912
Creator: Pettit, Lee
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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