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in subjects: "locks"  
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Automobile Lock.

Description: Patent for "certain new and useful improvements in automobile locks", including instructions and illustrations.
Date: February 13, 1917
Creator: Needham, Edmund T.
Partner: UNT Libraries Government Documents Department

Lock.

Description: Patent for a keyed lock with "an improved mounting and arrangement of the locking tumblers whereby the same are properly held against displacement within the body of the lock so that they will properly engage with the locking bolt."
Date: July 13, 1915
Creator: Dunaway, Harrison
Partner: UNT Libraries Government Documents Department

Lock-Nut.

Description: Patent for a lock-nut which prevents the nut from accidentally rotating on the bolt, including illustrations. The nut is locked in position when a locking key is introduced to grooves on the lower surface of the nut and the adjacent face of the washer.
Date: February 13, 1906
Creator: Crawford, Hezekiah H.
Partner: UNT Libraries Government Documents Department

Nut Lock

Description: Patent for a nut lock. Illustration included.
Date: June 13, 1905
Creator: Mills, Thomas M. & McKinnon, Thomas J.
Partner: UNT Libraries Government Documents Department

Padlock.

Description: Patent for a new and improved padlock. This design "relates . . . more particularly to those padlocks which are used for locking railway-switches . . . [T]he invention consists in a padlock comprising a bow, or hasp, or shackle, a spring-bolt for engaging the same, tumblers, and a lever connecting the tumblers and bolt, a locking device for the tumblers, and an audible alarm, such as a bell" (lines 9-25).
Date: January 13, 1891
Creator: Lucas, George William
Partner: UNT Libraries Government Documents Department

Nut-Lock.

Description: Patent for a nut lock with a locking washer at the base of the nut that does not unscrew. The nut forms a bar of spring metal.
Date: March 13, 1894
Creator: Mauermann, Albert J.
Partner: UNT Libraries Government Documents Department

Hinged Connection

Description: Patent for a simply designed, durable, and inexpensively produced hinged connection between any swinging item (i.e., door) and non-swinging item (i.e., door jam).
Date: April 13, 1915
Creator: Coleman, Paul H.
Partner: UNT Libraries Government Documents Department

Switch-Operating Mechanism.

Description: Patent for a switch-operating mechanism than "may be changed quickly and positively from a moving car" (lines 15-16).
Date: February 13, 1894
Creator: Lott, Charles C.
Partner: UNT Libraries Government Documents Department

Sash-Lock

Description: Patent for a window sash lock which allows window sashes to "be adjusted to any desired position in the window-frame and locked in the said position" (lines 12-14) as well as to "be readily released from its locked position when it is desired to adjust the window sash" (lines 17-19), including illustrations.
Date: August 13, 1918
Creator: Keller, John
Partner: UNT Libraries Government Documents Department

Permutation-Lock.

Description: Patent for "new and useful improvements in permutation-locks." (Lines 6-7) This lock is specifically designed to protect delivered milk bottles from theft.
Date: November 13, 1917
Creator: Kirkpatrick, Otey R.
Partner: UNT Libraries Government Documents Department
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