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in subjects: "locks"  
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Lock.

Description: Patent for a new and improved lock. This design "is to produce a lock and key in which the lock-case has no exterior opening communicating with its wards or works, but is provided with a recess only for supporting the shank or axis of the key, while the only opening for the admission of the key to the interior of the lock, whereby its wards or bolt may be operated or controlled, is upon the interior of the lock-case, so that there is no possibility of introducing . . . picking devices therein, … more
Date: June 30, 1885
Creator: Markham, Thomas W.
Partner: UNT Libraries Government Documents Department

Lock for Sliding Doors.

Description: Patent for a new and improved lock. This design consists "[i]n a lock, the combination of the latch, the spring pressing upon it, and the trip-lever, provided with upper and lower arms and the former serving as a seat for the spring and the latter having a projection for the key to act upon" (lines 97-102).
Date: November 10, 1885
Creator: Hayden, Miles & Dixon, William Cason
Partner: UNT Libraries Government Documents Department

Nut Lock.

Description: Patent for a new and improved nut lock. This design "consists in a friction roller held loosely between two nuts, or between a nut and any object to be held by a bolt, which roller, when the nut or lock-nut is screwed down upon it, binds the nut or nuts upon the bolt and locks them securely thereon" (lines 11-16).
Date: January 20, 1885
Creator: Campbell, James A.
Partner: UNT Libraries Government Documents Department
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