Communications: electrical – Selective – Having indication or alarm
Patent
1980-05-16
1982-11-30
Caldwell, Sr., John W.
Communications: electrical
Selective
Having indication or alarm
188151A, 246185, 303 20, 303DIG1, 307 10R, 307118, 340 47, 340 60, 340626, B60Q 100
Patent
active
043618251
ABSTRACT:
In an automatic train-line air brake pressure monitoring system, a peak detector and hold circuit determines the peak voltage of an input signal representing the air pressure in the air brake system. A signal representing the present peak voltage of the input signal from the previously detected peak voltage is subtracted from the presently detected peak voltage to provide a subtraction output signal such that signals representative of the air brake pressure can be generated. The monitoring system may provide emergency air brake condition signals, as well as a number of programmable monitoring signals representative of different pressures within the air brake pressure system.
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Caldwell Sr. John W.
Nowicki Joseph E.
Southern Railway Company
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