5 Matching Results

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Lock. (open access)

Lock.

Patent for a new and improved lock. This design "is to produce a lock and key in which the lock-case has no exterior opening communicating with its wards or works, but is provided with a recess only for supporting the shank or axis of the key, while the only opening for the admission of the key to the interior of the lock, whereby its wards or bolt may be operated or controlled, is upon the interior of the lock-case, so that there is no possibility of introducing . . . picking devices therein, or of introducing any explosive agents" (lines 15-27).
Date: June 30, 1885
Creator: Markham, Thomas W.
System: The Portal to Texas History
Improvements in Cotton-Gins (open access)

Improvements in Cotton-Gins

Patent for improvement in the Cotton-Gin with moveable brushes. This object is designed to make the brushes on the cotton machine move closer to the saw when they become shortened from constant use. This will improve the quality of the machine like a brand new equipment.
Date: June 22, 1875
Creator: Koehl, William
System: The Portal to Texas History
Improvement in Scale-Beams. (open access)

Improvement in Scale-Beams.

Patent for "the movable weight used on scale-beams; and it consists in the construction and arrangement of the weight to slip over the scale-beam, and with a roller, upon which the weight rests or is suspended, in combination with a locking device." (Lines 12-17) Includes instructions and illustrations.
Date: June 29, 1875
Creator: Robinson, William T.
System: The Portal to Texas History
Vertical Steam-Pump. (open access)

Vertical Steam-Pump.

Patent for improvements in steam-pumps, of which “are adapted to compress a liquefiable gas—such as that of ammonia—to a state of partial liquefaction, the pressure being subsequently removed and the liquefied refrigerating agent expanding through tubes and chambers, and the cooling effect produced by the volatile liquid again assuming its gaseous state is utilized for the absorption of heat.” (Lines 10-17) Illustration is included.
Date: June 23, 1891
Creator: Robinson, Charles H.
System: The Portal to Texas History
Mechanism For Converting Reciprocating Into Rotary Motion. (open access)

Mechanism For Converting Reciprocating Into Rotary Motion.

Patent for an improvement to drive shafts used in automobiles, other motor vehicles, and machine tools that convert reciprocating into rotary motion, including instructions and illustrations.
Date: June 3, 1913
Creator: Smith, Robert W. J.
System: The Portal to Texas History