UNT Libraries Government Documents Department - 6 Matching Results

Search Results

Results: 1 - 6

Clutch Clamp.

Description: Patent for a new and improved clutch-clamp. This design "is to provide a simple and effective device for lowering or hoisting the pipe or rods of pumps into bored wells or other places, such as mines or shafts, and without injury to the pipe or rod, such device being not only readily and easily handled in connecting it to or disconnecting it from the object to be raised or lowered, but capable of being manufactured at comparatively small cost" (lines 20-29).
Date: August 16, 1887
Creator: McCoy, John William

Electrically-Operated Door.

Description: Patent for am electrically-operated door. This device has mechanisms that are when stepped on automatically open and close the door.
Date: August 1, 1916
Creator: Cain, Ira L.

Flooring or Ceiling Jack.

Description: Patent for a flooring or ceiling jack that is meant to "provide a device, whereby the laying of the flooring, and the fitting of siding and ceiling strips are greatly facilitated, and enables one carpenter to do the work that ordinarily requires two" (lines 14-18).
Date: August 22, 1893
Creator: Holiman, William Moses

Jack.

Description: Patent for a jack for lifting heavy loads on railroads, which has an automatic steady movement of the load up and down without adjusting the jack settings.
Date: August 6, 1907
Creator: Blake, David Alexander & Blake, Charles William

Railroad Joint

Description: Patent for a railroad joint. Illustration included.
Date: August 17, 1909
Creator: Coupland, David B.
Back to Top of Screen