UNT Libraries Government Documents Department - 17 Matching Results

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Automatic Switch Indicator

Description: Patent for an automatic switch indicator. This invention is designed to "prevent accidents resulting from misplaced switches, due to the carelessness of the railroad employees or the inability of the engineer to see the customary track-signals" (line 14-19). Illustrations included.
Date: October 23, 1906
Creator: Coffin, Edward F.; Shaw, Carey & Green, Samuel
Item Type: Refine your search to only Patent

Lifting Jack.

Description: Patent for lifting-jack invented by Calvin W. and Eugene Tanner. This lifting-jack invention is meant to be more durable in material, the material more inexpensive to acquire.
Date: July 3, 1906
Creator: Tanner, Calvin W. & Tanner, Eugene
Item Type: Refine your search to only Patent

Plow.

Description: Patent for improvements to the turning-plow, with convertible attachments for other forms of plow.
Date: December 11, 1900
Creator: Armstrong, John Joshua, Sr.
Item Type: Refine your search to only Patent

Plow Attachment

Description: Patent for a plow attachment. This invention works with sweep plows and consists of a runner and secured to the end of the plow beam. Illustration included.
Date: January 1, 1907
Creator: Wiegert, Theodore & Neumann, Louis
Item Type: Refine your search to only Patent

Railway-Ticket, &c.

Description: Patent "to furnish for railway-companies a form of excursion-ticket whose return portion or stop-over portion, as the case may be, is not capable of successful use by scalpers" (lines 11-15).
Date: July 9, 1901
Creator: Smith, Lowndes G.
Item Type: Refine your search to only Patent

Switch Operating Device

Description: Patent for a simple, inexpensive and efficient design for an operating switch for use on street-railway cars to enable a motorman to quickly throw a switch or set switch without leaving the platform of the car.
Date: October 15, 1901
Creator: Tanner, Calvin W.
Item Type: Refine your search to only Patent

Well-Screen.

Description: Patent for improvements in well-screen by providing a symmetrical strainer which having an exceedingly firm and rigid frame; it is constructed as to interpose the least obstruction to the straining operation. (Lines 21-25) Illustration is included.
Date: December 8, 1903
Creator: Karsch, George J.
Item Type: Refine your search to only Patent
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