-Movable Brake Valve

https://www.lehigh.edu/~asj316/technology/brake_valve_001.jpg

International Textbook Company
[Movable Model of an Automatic Brake Valve for Westinghouse Locomotives : No. 50.]
Scranton, PA: International Textbook Company, [1920].

Lehigh University Catalog Record: https://asa.lib.lehigh.edu/Record/11133330

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https://www.lehigh.edu/~asj316/technology/brake_valve_002.jpg
Technology
-Movable Brake Valve