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in creator/contributor: "Waldron, William J."  
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Angle-Cock.

Description: Patent for "a locking device for the train pipe valve or plug, and a connection separate from the train pipe and under the control of the engineer, to manipulate the said locking device and secure the valve or plug in position." (Lines 13-18) Includes instructions and illustrations.
Date: March 19, 1895
Creator: Waldron, William J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Angle-Cock.

Description: Patent for "a new and improved angle-cock so constructed that the plug cannot be turned by an unauthorized person without the knowledge of the engineer in charge of the train." (Lines 8-12) Includes instructions and illustrations.
Date: August 25, 1896
Creator: Waldron, William J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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