Counties
Language
1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
Railway Signal.
Patent for a new and improved railroad signal. This design consists in "[a] continuous electric conductor extending beside a railroad, a contact-maker borne by a train, an electric galvanic battery, a stationary transmitter, and a train provided with transmitting and receiving instruments on two or more members of the train and connected with the electric circuit in multiple arc . . . whereby a message can be sent to each member simultaneously" (lines 8-17).
Date:
June 7, 1887
Creator:
Armstrong, James Henry
System:
The Portal to Texas History