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Coupling-Pin.

Description: Patent for a coupling pin for railroad cars, which prevents the coupling from coming loose accidentally by having a key which locks the coupling in place and can only be undone by the cars operating systems. when it is time to disconnect the car.
Date: July 23, 1907
Creator: Yeiser, John Clarke
Partner: UNT Libraries Government Documents Department

Building Structure

Description: Patent for a building support structure for bridges, buildings, dams, etc. Illustrations included.
Date: May 5, 1908
Creator: Morton, Milo A.
Partner: UNT Libraries Government Documents Department

Bicycle Lock

Description: Patent for a bicycle lock. Illustration included.
Date: December 25, 1906
Creator: Hayford, Samuel & Hayford, Kirby
Partner: UNT Libraries Government Documents Department

Improvements in Sash-Lock

Description: Patent for an improvement on sash locks or fasteners for a window frame to allow two sashes to be controlled by one sash.
Date: June 16, 1903
Creator: Miller, John D.
Partner: UNT Libraries Government Documents Department

Automatic Railway Switch Lock

Description: Patent for an automatic railway switch lock. Illustration included.
Date: May 17, 1904
Creator: Sulfer, Charles
Partner: UNT Libraries Government Documents Department

Air Brake Lock

Description: Patent for an air brake lock. Illustrations included.
Date: May 16, 1905
Creator: Mabry, Davis L.
Partner: UNT Libraries Government Documents Department

Blind-Stop.

Description: Patent for a device which locks blinds in place at the desired angle.
Date: October 22, 1907
Creator: Koenig, Charles L.
Partner: UNT Libraries Government Documents Department

Bedstead Lock or Joint

Description: Patent for a bedstead lock or joint. Illustration included.
Date: August 17, 1901
Creator: Martin, Mack D.
Partner: UNT Libraries Government Documents Department

combination lock

Description: Patent for a combination lock. Illustration included.
Date: December 25, 1906
Creator: Wilcox, Ferdinand S. & Tucker, George D.
Partner: UNT Libraries Government Documents Department

Window Attachment.

Description: Patent for "window attachments, being in the nature of means for carrying the shade-roller and lace-curtain on the upper sash and devices whereby the sashes may be locked when closed or opened to any desired extent;" (lines 8-13) and illustrations.
Date: June 24, 1902
Creator: Hamilton, Robert
Partner: UNT Libraries Government Documents Department

Window-Lock.

Description: Patent for locking windows in place at various elevations with illustrations.
Date: January 21, 1908
Creator: Kinsey, Columbus M.
Partner: UNT Libraries Government Documents Department

Mail-Bag Fastener.

Description: Patent for a mail bag fastener which automatically locks when closed and can only be opened with a key.It also holds the mail bag open when letters are being withdrawn.
Date: July 16, 1907
Creator: Barr, George Taylor
Partner: UNT Libraries Government Documents Department

Key.

Description: Patent for a key, which can be produced in quantity but without any of them being able to open the same door.
Date: February 4, 1908
Creator: Katzenberger, Oscar
Partner: UNT Libraries Government Documents Department

Locking-Bolt for Guards to Openings.

Description: Patent for a locking mechanism for windows, which cannot be unlocked from the outside.
Date: March 31, 1908
Creator: McNeil, Clarence W.
Partner: UNT Libraries Government Documents Department

Locking System for Jail-Doors

Description: Patent for locking system for jail doors where locks of a series of cell doors can be operated simultaneously.
Date: January 27, 1903
Creator: Youngblood, David Franklin
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a lock. This invention is a design of door lock that uses a key and combination. Illustration included.
Date: February 12, 1907
Creator: Katzenberger, Oscar
Partner: UNT Libraries Government Documents Department

Line-Lock Attachment for Type-Writing Machines.

Description: Patent for improvements in line-lock attachments for type-writing machines in which “it prevent the printing of one letter over another by effecting a locking of the key-levers when the carriage of the machine reaches the end of the line.” (Lines 26-29) Illustration is included.
Date: July 5, 1904
Creator: Parker, William A.
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

Lock

Description: Patent for a lock. Illustration included.
Date: November 6, 1906
Creator: Katzenberger, Oscar
Partner: UNT Libraries Government Documents Department

Lock for Toy Banks

Description: Patent for a lock for toy banks. Illustrations included.
Date: June 22, 1909
Creator: Hansen, Christian
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a general lock but made especially for trunk locks. It adds a spring lock and preventative measures against lock picking.
Date: October 14, 1902
Creator: Kirk, Robert L.
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a lock. Illustrations included.
Date: April 21, 1908
Creator: Winslow, Walter W.
Partner: UNT Libraries Government Documents Department

Lock-Escutcheon.

Description: Patent for a lock escutcheon, which can be attached to the door on either side and which does not require carpentry expertise to install.
Date: November 16, 1909
Creator: Magruder, Paul K.
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a lock. This lock is designed for a coin fed lock that releases the key for the customer. Illustration included.
Date: June 2, 1908
Creator: Johnson, Randall
Partner: UNT Libraries Government Documents Department
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