Abstract
This instrument for remote observation works within 50km distance on 4 wires. The principle of the direction recorder depends on Olland's system as shown in Fig. 1. Two Warren's synchronous motors are used for synchronizing the transmitter and the recorder. The wind direction and range are recorded by means of electric impulses. The electric sources required for operating this instrument are a 12 volt storage battery and a 100V. a. c. At the time of interruption of the a. c., an inverter revolves automatically and supplies a. c. to the instrument.
These recorders were installed in the Hachijo-jima Weather Station and the transmitter was placed on a hill located at a distance of 10km from the station.
