It comprises of a spring mounted steel vibrator arm which carries a contact connected in series with a solenoid. The free end of the vibrator carries a marking point which strikes the paper tape through a disc of carbon paper, thus making the tapes once for each oscillation. It works on 6-9 volt, 1Amp. A.C. power supply. The instrument is mounted upon a base and 4mm brass socket terminals are provided for electrical connection. Complete with round carbon papers and roll of paper strip.
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