Abstract: Tension dynamometer which, when in traction connection with a cable, serves to determine the tension forces during the laying of the cable, the dynamometer including the following parts:a strain gauge (9),a preamplifier (10),a voltage-to-frequency converter (11) which converts the signal from the force measuring sensor,a transfer circuit (12, 13) which uncouples the converted signal of the force measuring sensor and transfers it to a reading station, anda storage battery (15) to supply power to the above-named elements.The dynamometer additionally has a time switch (17, 18) which interrupts the power supply of at least one current-consuming element after an established period of constant tension force and turns it on again upon the occurrence of a tension force change, or extends this period by an established length of time upon the occurrence of a tension force change during the period and during the extension does not interrupt the power supply.

Abstract: Apparatus for measuring a traction force which is measured during cable laying by means of a traction dynamometer (5) disposed between the cable (10) and a wire rope (11), the dynamometer including a strain gauge and a measuring circuit which amplifies the signals received from the strain gauge and converts them into frequency-modulated signals proportional to the traction force. These signals are fed to a measurement receiver (22) set up in the area of a winch (20), the wire rope (11) incorporating a first conductor to the measurement receiver (22) and the ground (24) incorporating another conductor. The output of the measuring circuit, which is connected to the conductor carried through the ground (24) has a measurement signal carrier frequency of 3 . . . 100 kHz and, with a capacitive coupling (C.sub.1, C.sub.2, C.sub.3) galvanically separated from the ground, transfers the signals through the ground to the measurement receiver (22).