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Improvement in Key-Hole Guards.

Description: Patent for "a guard for key-holes of locks, to prevent the use of keys by unauthorized persons, the picking of the lock, and as a means for operating the bolt when fitted for that purpose." (Lines 7-11) Includes instructions and illustrations.
Date: December 23, 1873
Creator: Hall, William N.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Improvement in Horse-Powers.

Description: Patent for improvements made to motors that power machinery, called "horse-powers." The specific improvements made are in the arrangement of mechanical pulleys from which the motor derives power, arranged in such a way that will not significantly increase the size or cost of the machine.
Date: February 4, 1873
Creator: Müller, Joseph
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Improvement in Insect-Destroying Compounds.

Description: Patent for a "compound for killing the cotton-worm and other insects that infest, eat, and damage the leaves of the cotton-plant," which "consists in combining a poisonous, an adhesive, and a diffusive ingredient in one and the same compound." (Lines 9-14) Includes instructions and illustrations.
Date: June 17, 1873
Creator: Royall, William B.
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Partner: UNT Libraries Government Documents Department

Improvement in Combination Locks.

Description: Patent for combination latch-locks, "in such manner as that the knob-latch, while performing its special function, will also serve as the lock upon any combination to which it may be adjusted, and the said latch can be operated from either the outside or inside of the door as a latch simply, or as a combination lock, which latter is further secured from the inside by the employment of a safety pin, rendering the bolt in its locked position perfectly secure, while by its partial withdrawal it pr… more
Date: July 1, 1873
Creator: Hall, Phidello W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Improvement in Combined Spades and Forks.

Description: Patent for a new improved and combined spade and fork to be used as a spade. It "consists in a sheet-metal sheath or pocket adapted to receive a fork and be secured" (lines 16-18 ) including illustrations.
Date: July 15, 1873
Creator: Stone, Heber
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Improvement in Hay and Cotton Presses.

Description: Patent for a press that reduces the bulk of cotton, "allowing it to be baled into convenient form for transportation. It consists in a novel mode of attaching the side of the press-box, so that they can be speedily thrown down from the cotton after compression to allow its convenient manipulation. It also consists in a new mode of connecting the follower with its superposed lever, so that it can be readily turned up out of the way when the cotton is being filled into the press-box. It also cons… more
Date: September 9, 1873
Creator: Nelson, David A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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