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 County: Limestone County, TX
 Collection: Texas Patents
Improvement in Gang-Plows.

Improvement in Gang-Plows.

Date: May 1, 1855
Creator: Hall, Thomas J.
Description: Patent for the improvement of the gang plow by the plows arrangement and pivoted beams to be adjustable for convenience, including illustration.
Contributing Partner: UNT Libraries Government Documents Department
Improved Cultivating-Plow.

Improved Cultivating-Plow.

Date: March 25, 1856
Creator: Crenshaw, Micajah
Description: Patent for a cultivating plow with a series of cutting-disks and digging-hoes, including illustration.
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Plows.

Improvement in Plows.

Date: April 3, 1855
Creator: Hall, Thomas J.
Description: Patent for the improvement of the Rotary-Disk Cutters for plows that enable it to swivel and be supported by guides, including illustration.
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Carriage-Axles.

Improvement in Carriage-Axles.

Date: July 26, 1870
Creator: Hall, William N.
Description: Patent for an easily replaceable and self-lubricating carriage axle. Includes instructions and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Fire-Place Fenders.

Improvement in Fire-Place Fenders.

Date: February 27, 1872
Creator: Hall, William N.
Description: Patent for "an extensible fender adapted for large or small fire-places" (lines 8-10) including instructions and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Permutation Locks.

Improvement in Permutation Locks.

Date: September 27, 1870
Creator: Hall, William
Description: Patent for improvements to permutation locks by various means.
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Combination Locks.

Improvement in Combination Locks.

Date: September 12, 1871
Creator: Hall, William N.
Description: Patent for improved combination locks, with a bolt that is locked or unlocked by the combination of spindles and pivoted buttons. The invention combines the spindles in to an "annular ring having letters or numbers and a series of different shaped pegs or combinations of letters or figures or both jointly" (pg 1).
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Combination-Padlocks.

Improvement in Combination-Padlocks.

Date: December 23, 1873
Creator: Hall, William N.
Description: Patent for "a padlock in which the permutation locking device is not permanently connected to the hasp; and said invention consists of a permutation device the fixed ends whereof are provided with sockets to receive the ends of a separate hasp, and be locked therewith by a notched bolt passing through the permutation device and both ends of the hasp, whereby the usual hinged connection of the parts is avoided, and the padlock made more secure and cheaper than when the parts are permanently united." (Lines 6-17) Includes instructions and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Key-Hole Guards.

Improvement in Key-Hole Guards.

Date: December 23, 1873
Creator: Hall, William N.
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.
Contributing Partner: UNT Libraries Government Documents Department
Improvement in Presses.

Improvement in Presses.

Date: September 24, 1872
Creator: Lasswell, Allen
Description: Patent for a new press design, including illustrations.
Contributing Partner: UNT Libraries Government Documents Department
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