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Cultural Resources Evaluation of the Plano Municipal Golf Course
An archaeological evaluation survey report for the proposed site of the Municipal Golf Course in Plano, Texas to determine whether any cultural resource were present in the area.
Date:
August 31, 1994
Creator:
Skinner, S. Alan & Whorton, Brenda B.
Object Type:
Report
System:
The Portal to Texas History
Dental Impression-Tray.
Patent for improvements in dental impression trays that is adaptable for when there is only one or a partial set of teeth. There is a separate, smaller dental impression tray that is easily accessible and can be adapted to take impressions of one tooth or partial teeth.
Date:
August 31, 1920
Creator:
Littlejohn, Thomas F.
Object Type:
Patent
System:
The Portal to Texas History
Cotton-Chopping Machine.
Patent for a cotton chopping machine, which can be attached to a cultivator, has a mechanically operated hoe, and automatically changes its cutting height for different heights of ground.
Date:
May 31, 1910
Creator:
Martin, John M.
Object Type:
Patent
System:
The Portal to Texas History
Car-Coupling.
Patent for a car-coupling that has a draw-bar attached to the car, a hollow draw-head with a flaring opening that sits horizontally to the draw-bar, a spring that holds the draw-head in the horizontal position, a bar that raises and lowers the forward end of the draw-head against the spring, a coupling-pin that sits in the draw-head, a chain that connects the draw-head to the bell-crank lever, a cam that supports the chain, and a device that turns the cam in either direction in order to tighten the chain.
Date:
March 31, 1896
Creator:
Epps, Charles
Object Type:
Patent
System:
The Portal to Texas History