Abstract: A measuring circuit includes a symmetric transmission line connecting a transducer to a measurement amplifier and to a fault indicating signal amplifier, the transducer delivering symmetric input signals to amplifiers, the first amplifier delivering a measuring signal representing the difference of its input signals and the fault indicating signal amplifier delivering a fault indicating signal representing the sum of the input signals. An auxiliary signal injected to the terminals of the transducer the invention enables the measuring circuit to evaluate the quality of the measuring circuit during operation of the tested machine and also when the machine is at rest.

Abstract: A chip-detector assembly has a housing and a probe. The probe is adapted to be coupled to the housing. The chip-detector assembly also includes a locking mechanism comprising a locking ring and a sleeve member. The locking ring is fixedly coupled the housing, and includes a plurality of elongated tangs arranged circumferentially around the ring. The sleeve member is fixedly coupled to the probe, and includes a plurality of contact surfaces that form an outer circumference of the sleeve member. The tangs engage the sleeve-member contact surfaces when the probe is coupled to the housing. The engagement of the tangs and the contact surfaces inhibits the probe from disengaging from the housing once the probe and the housing are coupled.

Abstract: A torque-limiting assembly includes a collar, a locking ring, and a sleeve member. The collar is co-axially and rotatably coupled to a fitting. The locking ring is non-rotatably coupled to the collar, and includes a plurality of elongate tangs arranged circumferentially around the ring. The sleeve member is non-rotatably and co-axially coupled to the fitting, and has a plurality of contact surfaces that form an outer circumference of the sleeve member. Torque is applied to the collar by way of a plurality of substantially flat surfaces disposed along an outer circumference of the collar. The torque is transferred to the locking ring by way of the fixed geometric relationship between the collar and the ring. The locking-ring tangs securely grasp the sleeve-member contact surfaces when the applied torque is below a predetermined amount, and thereby transfer a substantial entirety of the applied torque to the fitting.

Abstract: A chip detector includes a probe having a locking portion and a housing that receives the probe. The housing comprises two lugs. The lugs engage a corresponding pair of slots defined in the locking portion when the probe is fully inserted in the housing. In particular, a first contact surface on the locking portion abuts a first sidewall on the lug when the probe is fully inserted, thereby securely coupling the probe to the housing. A second contact surface on the locking portion abuts a second sidewall on the lug when the probe is fully inserted, thus preventing the probe from rotating in relation to the housing.

Abstract: The damping of a coil (L1) can be influenced by an object (1) so that the high-frequency voltage at the coil (L1) depends on the distance (a) of the object (1) from the coil (L1). A constant dc current is superimposed on the high-frequency current through the coil, the dc voltage drop at the coil (L1) which corresponds to the dc resistance of the coil (L1), damping the coil (L1), being influenced by the temperature. The high-frequency excitation (5, 6) of the coil (L1) is controlled by the dc voltage drop in order to compensate for the influence of the temperature on the high-frequency voltage so that the high-frequency voltage depends solely on the distance (a). The high-frequency voltage, having a nonlinear correlation to the distance (a), is linearized in a nonlinear member (15) with a semiconductor element with respect to the distance (a). In this connection, the effect of the temperature on the linearization is compensated for by means of a second semiconductor element.

Abstract: The measuring device of the useful load and of the load on the axles of a truck comprises load cells mounted on a truck frame. A plate transmits the weight of the tipper and the one of the useful load to the load cells. The device comprises three load cells forming a system having three bearing points. The axis of the single front load cell is perpendicular to the common axis of the rear pair of load cells. This arrangement and the fact that each load cell is mounted on a knee-joint permits to eliminate the parasitic constraints of flexion and torsion on the load cells so that the load cells are submitted only to the constraints resulting from the weight of the tipper and the one of the useful load which improves considerably the precision of the measurement.