An Event Recorder Using Transistor Switches
J. W. Streater · IRE Transactions on Industrial Electronics · 1961
An improved event recorder has been developed which is capable of resolving the time-relationships among two-state events to within two milliseconds. Conducting styli, writing on electrosensitive chart paper, are switched on or off by transistor circuits functioning as nonmechanical relays having fast response, high sensitivity, and minimum size.