Country
Counties
Day
1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
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