7 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "locks"  
Results: 1 - 7

Auxiliary Door-Lock

Description: Patent for an auxiliary door lock, that may be used with any type of door, and that is portable, with illustrations.
Date: March 2, 1920
Creator: Shirley, William Arthur
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

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

Railway Switch Lock.

Description: Patent for a new and improved railway-switch lock. This design "consists in a novel construction and arrangement of parts whereby an independent key is used to unlock the latch or bolt of the bolt-case" (lines 14-17).
Date: August 2, 1881
Creator: Angus, Alexander & Phillips, George
Partner: UNT Libraries Government Documents Department

Sash-Lock.

Description: Patent for a sash lock that comprises two members that are secured together in a manner to hold the meeting rails in close contact.
Date: May 2, 1916
Creator: Huber, Frederick K.
Partner: UNT Libraries Government Documents Department

Nut-Lock.

Description: Patent for Nut-Lock. The invention is to enable locking a nut upon a bolt, to keep from coming undone due to vibration.
Date: April 2, 1918
Creator: Morris, William T.
Partner: UNT Libraries Government Documents Department

Permutation-Lock.

Description: Patent for a permutation lock, which is harder to break into than the previous version.
Date: February 2, 1909
Creator: Maxfield, James R.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen