UNT Libraries Government Documents Department - 10 Matching Results

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Boot

Patent for a boot design that contains a counter-support of coil springs while also being inexpensive, durable, and efficient.

Date: October 2, 1888

Creator: Benson, Henry L.

Patent for a calculator which consists of semicircular device with movable pointers and number indexes printed on it that allows the pointers to be moved to different numbers to produce the answer to a math problem such as calculating the cost of goods sold by the pound in a store.

Date: December 21, 1909

Creator: Goss, George Wilson

Concentration of Ores.

Patent for improvements to recovering ore using flotation methods.

Date: December 17, 1918

Creator: Wiser, Oba

Crude-Oil Burner

Patent for a portable crude oil burner that attaches to stoves.

Date: September 20, 1910

Creator: Lubbock, William L. & Hamblen, Samuel

Low-Water Alarm For Boilers

Patent for "improvements in low water alarms for steam boilers and more particularly to those which are operated by the heat from the steam in the boiler, after the water therein has fallen below a predetermined danger point" (lines 15-20).

Date: January 5, 1915

Creator: Anderson, Williamson D. & Shearer, Edward J.

Protector for Detonator-Caps.

Patent for a detonator cap that acts as a "protecting device...to seal the inner end of the cap into which the adjacent end of the fuse is projected in use." (lines 13-16)

Date: October 9, 1917

Creator: Dillard, George L.