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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

Chain-Lock.

Description: Patent for an improvement in chain-locks. The improvement locks one end of a log chain to a car so that it cannot be accidentally released.
Date: October 1, 1918
Creator: Clarkson, Jay Caleb.
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.

Description: Patent for a lock that was invented for house doors, outside doors, inner safe doors, and other similar doors. The lock is simple in construction and easily operatable for the user's efficiency.
Date: unknown
Creator: Bell, William E. & Brown, Francis W.
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a lock. Illustrations included.
Date: December 15, 1908
Creator: Greene, George W.
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

Switch-Hook

Description: Patent for a switch lock which prevents "splitting" (line 13). Illustrations included.
Date: January 28, 1908
Creator: Tullock, John Thomas
Partner: UNT Libraries Government Documents Department

Gate.

Description: Patent for the invention of gate which can be opened inward and outward by certain features such as supporting brackets and a spirally grooved shaft that can rotate between brackets.
Date: August 28, 1906
Creator: Gilbert James Madison
Partner: UNT Libraries Government Documents Department

Gate

Description: Patent for a gate that can be opened or closed from a remote point, and can be locked with a latch. Illustrations included.
Date: June 11, 1907
Creator: Rogers, Frederick S.
Partner: UNT Libraries Government Documents Department

Electric Switch

Description: Patent for an electric combination lock switch. Illustrations included.
Date: August 2, 1910
Creator: Wright, Joseph Henderson
Partner: UNT Libraries Government Documents Department

Gate-Fastener

Description: Patent for latches for swinging gates. Illustrations included.
Date: September 17, 1912
Creator: Pochyla, Adolph A.
Partner: UNT Libraries Government Documents Department

Flood-Gate.

Description: Patent for a flood-gate meant for use in mill-dams, races, and levees. Its intended use is to allow water to come to a certain height, and automatically release water once it gets past that point. When the water returns to a reasonable height, the gate automatically closes.
Date: December 26, 1893
Creator: Dean, Asa
Partner: UNT Libraries Government Documents Department

Permutation-Lock.

Description: Patent for improvements and simplification of the permutation lock including a latch-bolt slidable case and a tumbler-shaft journaled in a side wall of the case.
Date: July 10, 1906
Creator: Katzenberger, Oscar.
Partner: UNT Libraries Government Documents Department

Safety-lock For Keyholes.

Description: Patent for improvements in safety-locks, which makes it secured against skeleton keys and lock-picking.
Date: April 9, 1912
Creator: Good, Titus E.
Partner: UNT Libraries Government Documents Department

Seal-Padlock

Description: Patent for a seal padlock, designed to "render it absolutely impossible to gain access to the interior of the lock" (lines 12-14). Illustrations included.
Date: June 11, 1907
Creator: Abrams, Frederic
Partner: UNT Libraries Government Documents Department

Seal-Padlock

Description: Patent for a padlock seal for train cars. Illustrations included.
Date: April 30, 1912
Creator: Lawler, Claude B.
Partner: UNT Libraries Government Documents Department

Hasp-Fastener

Description: Patent for a hasp fastener designed to hold a hasp in a locked position by use of gravity. Illustrations included.
Date: June 16, 1908
Creator: Robinson, Albert W.
Partner: UNT Libraries Government Documents Department

Automobile Security Lock Device.

Description: Patent for a new and useful form of automobile lock adaptable for use in connection with the steering column and steering wheel of the car or automobile to be locked.
Date: December 18, 1917
Creator: Mushaway, Alden
Partner: UNT Libraries Government Documents Department

Breakwater.

Description: Patent for improving seawalls to "preserve channels across the bars at the mouths of rivers, creeks, or canals and between bays and gulfs" (lines 6-8), including illustration.
Date: June 7, 1859
Creator: Armour, D. Hillen
Partner: UNT Libraries Government Documents Department

Canal-Gate.

Description: Patent for an improvement to canal-gates that is "a simple and comparatively inexpensive contrivance for receiving a handle of the shank of a handle which is attached to the lock or gate" (lines 18-22) including an illustration.
Date: March 9, 1920
Creator: Perry, Charles Franklin
Partner: UNT Libraries Government Documents Department
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