UNT Libraries Government Documents Department - 6 Matching Results

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Improvement in Ventilators.

Description: 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.
Item Type: Refine your search to only Patent

Improvement in Air-Cooling Apparatus.

Description: Patent for "the construction and arrangement of a refrigerator for the purpose of cooling and maintaining a low and dry temperature, for preserving fresh meats and vegetables, and for cooling rooms for any purpose." (Lines 10-15) Includes instructions and illustrations.
Date: March 30, 1875
Creator: Hyatt, Frank A.
Item Type: Refine your search to only Patent

Improvement in Cotton-Presses.

Description: Patent for "a press by means of which the cotton can be backed and pressed into the bale in small quantities at a time, by alternating pressing a quantity, then lifting the follower, and inserting more, and pressing again, and so on until the bale is formed." (Lines 19-25) Includes instructions and illustrations.
Date: November 16, 1875
Creator: Frost, Willis Lee
Item Type: Refine your search to only Patent
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