UNT Libraries Government Documents Department - 43 Matching Results

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Adjustable Split Lock-Nut or Union.

Patent for an affordable and efficient coupling device for use "on valve rods of internal combustion engines, especially those used in automobiles and aeroplanes or on those motors or engines employing overhead valves and whereby the union or coupling may be readily and securely locked on a valve rod with sufficient resistance to withstand the strain of direct pressure" (lines 14-21).

Date: August 17, 1920

Creator: Dickinson, Harry E.

Item Type: Patent

Gradometer.

Patent for a gradometer "which will accurately indicate under the most varying and unstable conditions the inclination and declination at which any moving body is traveling" (lines 10-13). The gradometer is "particularly adapted for use on motor vehicles" (lines 15-16).

Date: May 17, 1921

Creator: Hall, Sidney Wilson

Item Type: Patent

Tube-Expander

Patent for a tube expander for setting boiler tubes in the holes in the tube-sheet, which provides simplicity and improvement of its construction.

Date: June 17, 1919

Creator: Walsh, Emmet

Item Type: Patent

Electrical Testing Device.

Patent for new and useful improvements in electrical testing devices. The invention provides references to innovative changes that allow for improved high-tension coil and armature testing.

Date: August 17, 1920

Creator: Bierbower, Richard C.

Item Type: Patent

Electrical Testing Device

Patent for a device to test electrical circuits for faults which is cheaper to manufacture, easier to use, smaller and more durable.

Date: August 17, 1920

Creator: Bierbower, Richard C.

Item Type: Patent

Piston Ring

Patent for improvements to piston rings to reduce leakage through piston grooves, rings, and joints.

Date: April 17, 1920

Creator: Olsen, Jens J. & Edwards, Lewis E.

Item Type: Patent

Separator for Secondary Batteries.

Patent for separators, made of celluloid or similar material, designed to separate secondary or storage batteries in an efficient and affordable way.

Date: February 17, 1920

Creator: Luthy, Josesph O.

Item Type: Patent

Roller-Distributor.

Patent for the invention of a roller distributor, or roller cam, that can "provide novel means whereby friction will be reduced" (lines 12-13) through the use of "a novel spring means being employed" (lines 13-14) in certain affordable, widely used vehicles.

Date: August 17, 1920

Creator: Lopez, Bruno

Item Type: Patent

Combination Tie and Rail-Joint

Patent for improvement in the safety of tie and rail-joints. Improves the connection so that independent movement of the tie and rail is reduced.

Date: November 17, 1914

Creator: Knaus, John J.

Item Type: Patent

Lock for Automobiles

Patent for Lock for Automobiles

Date: October 17, 1916

Creator: Harris, Robert M. & Wade, Milton V.

Item Type: Patent

Permutation-Lock.

Patent for a device of a permutation lock. One of its objects is to improve the permutation mechanism thereof and to provide novel means whereby the combination of the lock may be changed.

Date: November 17, 1914

Creator: Meepos, Max

Item Type: Patent

Door Controlled Electric Switch

Patent for an improved switch attachment that will allow a room, vault, or compartment to be kept lighted when door is open or closed, but may also be shut off when leaving the room.

Date: October 17, 1916

Creator: Kreter, Otto

Item Type: Patent

Aeroplane

Patent for Aeroplane. This flying machine will automatically return to normal horizontal position if tilted.

Date: September 17, 1909

Creator: MacManus, Agustus, F.

Item Type: Patent

Economic Opportunities Development Corporation of San Antonio and Bexar County: Planning and Priorities

A report on the plans and priorities of the Economic Opportunities Development Corporation of San Antonio and Bexar County based on results from a community survey on October 30, 1970 as part of an application for the Office of Economic Opportunity Community Action Program.

Date: November 17, 1970

Creator: Economic Opportunities Development Corporation of San Antonio and Bexar County

Item Type: Report

East Central Independent School District Academic Excellence Indicators Report: 1993-1994

Annual report about the overall condition of the East Central Independent School District in San Antonio, providing statistics and assessments for the 1993-1994 school year.

Date: November 17, 1994

Creator: San Antonio (Tex.). East Central Independent School District.

Item Type: Report