UNT Libraries Government Documents Department - 613 Matching Results

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Adding-Machine.

Description: Patent for am adding machine by using two disks, one a units-disk with pins in multiples of ten, one a tens-disk, is an annular disk with pin surrounding the units disk, an outwardly spring-pressed holder having a beveled outer end frictionally engaging the pins of the tens-disk and a carrier having oppositely-beveled ends engaged a supplemental pin and one pin on the tens-disks, teeth in the adjacent faces of the holder and carrier, and an idle-gear between them to enable the adding operation.… more
Date: May 12, 1891
Creator: Wright, Joseph W.
Item Type: Refine your search to only Patent

Adding-Machine.

Description: Patent for a new and improvement in adding-machines in which a mechanical wheel has teeth. " The object of the invention is to provide the means for adding columns of figures by machinery"(lines 13-15), with instruction and illustration
Date: February 12, 1884
Creator: Barmore, Albert King
Item Type: Refine your search to only Patent

Adjustable Device for Dressing Down Bearings

Description: Patent for a tool that dresses down bearings. Railroad engine journals and their corresponding bearings show wear over time. When replacing bearings into such a journal, without adaptation of the bearing there will be an improper fit, resulting in "hot journals" or "hot boxes". This tool adapts a bearing to a proper fit for the journal into which it will be installed.
Date: December 12, 1922
Creator: Mitchell, William A.
Item Type: Refine your search to only Patent

Aeroplane.

Description: Patent for improved propulsion for airplanes involving propellors in the front and rear of the plane. This aids in regulating air currents to stabilize flight, landing and speed. The patent includes illustrations.
Date: June 12, 1917
Creator: Campbell, John R.
Item Type: Refine your search to only Patent

Amalgamator.

Description: Patent for a new and improved amalgamator. This design "consists in placing in the bottoms of the chambers a number of iron balls or other suitable-shaped pieces of amalgamated iron, which have sufficient room to move freely among themselves, and then forcing up through the balls or pieces of iron, in contradistinction to forcing it down over their tops, the amalgamated ore and water, so as to cause the pieces of iron to vibrate, and thus to grind and break the pieces of quartz passing up throu… more
Date: September 12, 1882
Creator: Schmidt, Erich Franz & Streernwitz, William Henry
Item Type: Refine your search to only Patent

Animal-Feed Device

Description: Patent for an animal feed device that is collapsible and that can be suspended from fences, vehicle wheels, other structures, the ground, or the animal itself. (lines 10-15
Date: December 12, 1905
Creator: Russell, George Washington
Item Type: Refine your search to only Patent

Animal Trap.

Description: Patent for a new and improved animal trap. This design consists in "a platform having a rod or bar secured to its upper face, and having the ends of the choke-spring coiled thereon, pins or prongs extending from one edge of the platform for engagement with a side of a box, a box having one of its sides elevated, against which the pronged end of the platform abuts for engagement therewith, and having recesses in its opposite ends for the recession of a loop, which passes thence over the free end… more
Date: June 12, 1888
Creator: Beach, Philemon Theodore
Item Type: Refine your search to only Patent

Animal-Trap.

Description: Patent for an animal trap "having a vestibule which will be operated by the weight go the animal entering the same to close the entrance-door and open an exit-door into a receiving compartment or cage" (line 13-18) including instructions and illustrations.
Date: September 12, 1905
Creator: Kirk, Robert L.
Item Type: Refine your search to only Patent

Ant Trap.

Description: Patent for an in-ground ant trap that prevents the ants from escaping once caught in the trap, including instructions and illustrations
Date: September 12, 1911
Creator: Knox, Jessie Lonzo
Item Type: Refine your search to only Patent

Apparatus for Hoisting Bales on Wagons.

Description: Patent for a new and improved bale hoister. This design "relates to apparatus for loading and unloading wagons, and it has for its object to provide an apparatus of this character which shall be cheap and simple in its construction, effective in its operation, strong and durable, an apparatus by the use of which a wagon may be quickly loaded and unloaded" (lines 9-15).
Date: May 12, 1885
Creator: Lamb, George Washington
Item Type: Refine your search to only Patent
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