UNT Libraries Government Documents Department - 130 Matching Results

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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

Water-Conveyer.

Description: Patent for a water conveyer for irrigation, which has a series of buckets on a conveyer belt which pour over a waterwheel to power the motor of the machine. This model has streamlined the buckets water flow to minimize the power used from the motor.
Date: December 24, 1907
Creator: Dove, John Oliver & Wirsing, Charley
Item Type: Refine your search to only Patent

Improvement in Combination Locks.

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).
Date: September 12, 1871
Creator: Hall, William N.
Item Type: Refine your search to only Patent

Improvement in Combination-Padlocks.

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 unit… more
Date: December 23, 1873
Creator: Hall, William N.
Item Type: Refine your search to only Patent

Improvement In Cotton-Gin-Saw Cleaners.

Description: Patent for "a device for quickly cleaning the saws of cotton-gins when they become gummed. It consists in a series of knives that are supported by a movable bar or frame, and may be thrust between the saws when the saws are to be cleaned (para. 4-5).
Date: April 23, 1878
Creator: Munger, Robert S.
Item Type: Refine your search to only Patent

Improvement in Cotton-Gin-Saw Cleaners.

Description: Reissued patent for "a device for quickly cleaning the saws of cotton-gins when they become gummed. It consists in a series of knives that are supported by a movable bar or frame, and may be thrust between the saws when the same are to be cleaned (para. 4-5).
Date: May 20, 1879
Creator: Munger, Robert S.
Item Type: Refine your search to only Patent

Mechanism for Handling Lint Cotton.

Description: Patent for a new and improved mechanism for handling lint-cotton. This design "has for its object to avoid the accumulation of dust and light particles of fiber in the atmosphere of the gin-house, to greatly reduce the dangers of destructive conflagrations in ginning establishments, to avoid the repeated handling of the cotton between the gins and the press, and to secure a more perfect separation from the cotton of dust and other foreign substances" (lines 8-16).
Date: December 2, 1884
Creator: Munger, Robert S.
Item Type: Refine your search to only Patent
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