FIELD: agriculture.
SUBSTANCE: device consists of light and acoustic indicators, power source, switching device and line holder. The switching device is represented by a double-arm lever or rod interacting with permanent magnet and electric contact. The double-arm lever or rod is connected to the line holder and equipped with adjustment element. The signal device is characterised by improved efficiency due to its tunability to the line tension by way of regulating the distance between the magnetic element and the electric contact with the help of adjustment screw or nut.
EFFECT: increasing the device efficiency and performance reliability.
3 cl, 8 dwg
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