UNT Libraries Government Documents Department - 15 Matching Results

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Cotton-Gin

Description: Patent for a new and improved cotton-gin, where the rollers, feed devices, and blades will be vertically disposed and arranged in groups, and which will also simplify the construction of cotton-gins.
Date: February 19, 1901
Creator: Wentworth, William Henry
Item Type: Refine your search to only Patent

Dental Handpiece

Description: Patent for a dental hand piece for dental tools so that they may be held or rotated at an angle relative to the hand piece. Illustrations included.
Date: February 2, 1909
Creator: Mayes, Robert Martin
Item Type: Refine your search to only Patent

Dumping-Cart

Description: Patent for a dumping cart with a body that locks to the frame, but can be released quickly to dump materials via two toggle arms connected to a crank handle. Including illustrations and instructions.
Date: February 25, 1903
Creator: Davis, Frank C.
Item Type: Refine your search to only Patent

Educational Device.

Description: Patent for improvements in educational device by providing “a simple and comparatively inexpensive one designed for teaching addition, multiplication, subtraction, and division and capable of enabling the same to be explained with greater ease and at the expenditure of much less energy of both pupil and teacher.” (Lines 12-18) Illustration is included.
Date: February 10, 1903
Creator: Williams, Willoughby Columbus
Item Type: Refine your search to only Patent

Elevator-Controller.

Description: Patent for improvements to elevator-controllers, related "to a hand-power rope-elevator equipped with electrical operating mechanism and means whereby the elevator may be quickly and effectually controlled either automatically or manually" (lines 11-15), including illustrations.
Date: February 5, 1901
Creator: Dubinski, Benjamin
Item Type: Refine your search to only Patent

Garbage-Burner.

Description: Patent for a garbage incinerator, which has a rotating grate to speed up the evaporation of moisture from the garbage and produce quicker burning.
Date: February 2, 1909
Creator: Burwell, John A.
Item Type: Refine your search to only Patent

Hay Press

Description: Patent for a hay press. This invention is a form of baling press that operates on a continuously reciprocated as hay is fed into the press chamber. Illustrations included.
Date: February 20, 1906
Creator: Lorenz, Alexander & Illg, William J.
Item Type: Refine your search to only Patent

Key.

Description: Patent for a key, which can be produced in quantity but without any of them being able to open the same door.
Date: February 4, 1908
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent

Lock

Description: Patent for a lock. This invention is a design of door lock that uses a key and combination. Illustration included.
Date: February 12, 1907
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent

Padlock.

Description: Patent for a padlock, which can only be opened with a certain key and prevents the use of many lock-picking devices.
Date: February 4, 1908
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent

Refrigerating Apparatus

Description: Patent for a refrigerating apparatus. This invention is a coil composed of two pipes of different diameters placed inside of each other acting as a condensing agent. Illustration included.
Date: February 12, 1907
Creator: Holdgreen, Julius H.
Item Type: Refine your search to only Patent
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