UNT Libraries Government Documents Department - 1,002 Matching Results

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Improvement in Postage or Revenue Stamps.

Description: Patent for an improvement in postage or revenue stamps. Patent for postage or revenue stamp "composed of two superposed sheets or layers, A B, the top layer carrying the printed designs, having parallel incisions therein, and the bottom layer being provided with adhesive material on the back". Patent for postage and revenue stamps that cannot be re-used.
Date: July 10, 1877
Creator: Beaumont, David G.
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Improvement in Pumps.

Description: Patent for "a pump having two barrels of different diameters, the larger being subjacent to the smaller, and each provided with a valved piston, said pistons being both secured to the same piston-rod, in combination with a weight, arranged to counter-balance the added weights of the water-columns above the smaller and below the larger piston." (Lines 12-20) Includes instructions and illustrations.
Date: September 24, 1878
Creator: Beeman, Geraldo A. & Mason, John T.
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Improvement in Policemen's Batons.

Description: Patent for an improved policemen's baton made of flexible material, such as india-rubber or gutta-percha, and sometimes an interior metal stem. Using a flexible material makes the baton elastic enough so that no serious injury can be caused, yet it is still effective. Illustration included.
Date: October 14, 1873
Creator: Beery, Simon & McDonald, John W.
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Improvement in Plows.

Description: Patent to improve the construction of the mold-board of the plow described in Letters Patent No. 163,352, "to make it more effective in preventing the black lands of Texas and other sticky and waxy soils from adhering to it, and to enable a proper furrow to be turned, however sticky and waxy the soil may be." (Lines 17-22) Includes instructions and illustrations.
Date: June 20, 1876
Creator: Bell, Francis R.
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Improvement in Plows.

Description: Patent for "plow mold-boards to which the black land of Texas, and other similar soils, will not adhere, so that a furrow can be turned, however sticky and waxy the soil may be." (lines 14-18) including instructions and illustrations.
Date: May 18, 1875
Creator: Bell, Francis R.
Item Type: Refine your search to only Patent

Improvement in Compound Engines.

Description: Patent for "a series of engines for working the steam over by exhausting it from the first into the second, and so on, for utilizing the pressure lost when steam is exhausted from a single engine into the air..." (lines 7-11) including instructions and illustrations.
Date: February 16, 1875
Creator: Bell, Jackson W.
Item Type: Refine your search to only Patent

Cotton-Picking Shade.

Description: Patent for a cotton-picking shade that will furnish a portable shade or shield for the use of cotton-pickers to protect them from the direct rays of the sun while at work.
Date: July 22, 1879
Creator: Benthall, John C.
Item Type: Refine your search to only Patent
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