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in subjects: "Science and Technology - Tools"  
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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
Partner: UNT Libraries Government Documents Department

Automatic Track Sweeping and Oiling Attachment for Street-Cars.

Description: Patent for improvements in automatic track sweeping and oiling attachments to street cars by having a transverse shaft carries a hub which has a series of brushes. When “the street car moves forward, the brushes on the transverse shaft are revolved, which sweep the rails and keep them clean.” (Lines 90-93) Illustration is included.
Date: May 12, 1891
Creator: Nesmith, Robert Henry
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

[News Script: Construction]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about about a new construction machine in Baltimore.
Date: 1971-05-12T24:00:00
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Script
Partner: UNT Libraries Special Collections

[News Script: Gas Station Operator]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about service station operator who barricaded himself in his station to avoid eviction.
Date: May 12, 1974, 10:00 p.m.
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Script
Partner: UNT Libraries Special Collections

Internal Combusion System

Description: Patent for new and useful Internal-Combustion Engine. Improves the provision of an engine which the cylinder is provided with a semi-spherical upper end, fr the rotatable reception of similar shaped power cylinder carrying shell. Specification of letter patent with illustration. Serial number 789.146
Date: May 12, 1914
Creator: Clough, George G.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Straightening-Machine

Description: Patent for an improved straightening machine to "straighten pipes, rails, and allied structures in an expeditious manner."
Date: May 12, 1914
Creator: Boykin, Burwell, Jr.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Railroad-Gate.

Description: Patent for improvements in automatic railway and farm gates by using a combination and arrangement of two supporting-frames, two sliding gates, a diagonal rod to secure the gates; with three levers each having its own functions, and two friction rollers. Illustration is included.
Date: May 12, 1891
Creator: Wood, Horace Overall & Smith, Sanford Sanders
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Plow-Facing

Description: Patent for an improvement on the coating and plastic facing of the mold boards and shovels on a plow.
Date: May 12, 1914
Creator: Martin, William A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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