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Improvement in Ventilators.
Patent for improvement in ventilators which combines a bell-mouthed vane with white induction and black eduction pipes for the purpose of introducing fresh air and eliminating foul air from an enclosed area.
Date:
December 21, 1875
Creator:
Moyer, Alexander L.
System:
The Portal to Texas History
Improvement in Rotary Spade-Cultivators
Patent for a rotary spade-cultivator that is secured to a frame, which is attached to the rear of a vehicle.
Date:
December 7, 1875
Creator:
Brodnax, David W., Sr.
System:
The Portal to Texas History
Improvement in Rotary Dredgers.
Patent for an improved rotary dredging-machine operated by adjustment from the engine through gearing enabling the manipulation of "a heavier wheel than would otherwise be practicable" (lines 71-72) with illustrations.
Date:
December 21, 1875
Creator:
Hawley, Abel
System:
The Portal to Texas History
Improvement in Sewing-Machine Thread-Guards.
Patent for "a guard attachment to the Wheeler & Wilson sewing-machine for preventing the thread from being thrown off the tension by the work, and for preventing the thread from running off the spool onto the spindle." (Lines 6-11) Includes instructions and illustrations.
Date:
December 21, 1875
Creator:
Roosevelt, Lillian
System:
The Portal to Texas History
Improvement in Locomotive Earth-Excavators.
Patent for "an earth-excavator, principally for use in making the road-beds for railroads, which shall not only do its work continuously, but which shall be equally efficient in throwing up an embankment or in making a deep cut." (Lines 8-12) Includes instructions and illustrations.
Date:
December 28, 1875
Creator:
Hawley, Abel
System:
The Portal to Texas History
Improvement in Adding-Machines.
Patent for an improved adding-machine design.
Date:
December 7, 1875
Creator:
Butt, Dennis, L. R.
System:
The Portal to Texas History
Improvement in Gang-Plows.
Patent for "a novel means of hanging the gang of plows beneath the draft-frame, in combination with levers and link-connections, whereby the plows can be adjusted to run at any desired depth, and firmly held after the adjustment." (Lines 18-23) Includes instructions and illustrations.
Date:
December 21, 1875
Creator:
McCormick, John R.
System:
The Portal to Texas History