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4 Matching Results
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Window-Shade Raiser.
Patent for an improved way of raising, lowering, and locking window shades into place. "The operating-cord passes over a pulley located between two larger disks, one of which is screwed toward the other by a spring to clamp the folds of the cord and is screwed in the opposite direction by means of a lever, upon which the chord itself acts when drawn in the proper direction" (lines 14-20).
Date:
April 14, 1896
Creator:
McCauley, John H.
System:
The Portal to Texas History
Well Drilling Apparatus.
Patent for an improved well-drilling apparatus. Improvements made to bull wheel shaft and the sand reel and casing line shaft so they may be operated independently of each other while utilizing the same source of power.
Date:
January 14, 1919
Creator:
Thorniley, Clarence W. & Thorniley, Charles, D.
System:
The Portal to Texas History
Rifle.
Patent for a rifle that uses electricity from a battery to ignite the explosive charge for the ammunition.
Date:
January 14, 1919
Creator:
Brannon, Virgil C.
System:
The Portal to Texas History
Brake Shoe
Patent for a brake shoe of the M. C. B. type.
Date:
November 14, 1916
Creator:
Christensen, Jakob V. C. T.
System:
The Portal to Texas History