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Low-Pressure Alarm and Indicator for Air-Brakes.
Patent for "air-brake mechanisms in general, and more particularly to the alarms for giving warning when the pressure in the train-pipe drops to a predetermined point and for giving a visual signal when such condition exists" (p. 1, lines 8-13).
Date:
October 25, 1900
Creator:
Parsons, Avery H.
System:
The Portal to Texas History