Abstract: The invention relates to a plug-on part for a plug connector (1), comprising a sleeve-like basic body (11) manufactured by deforming a strip of material (13) having two longitudinal edges (15a, 15b) and two transverse edges and by connecting the longitudinal edges (15a, 15b). According to the invention, a surface (14d) of the strip of material (13) having the first longitudinal edge (15a) comprises at least a first locking element (21a, 21b; 71) and a further surface (14a) of the strip of material (13) having the second longitudinal edge (15b) comprises a further locking element (23a, 23b; 73) complementary to the first locking element (21a, 21b; 71); and the connection of the longitudinal edges (15a, 15b) of the strip of material (13) to form the sleeve-like basic body (11) is performed by cooperating locking elements (21a, 21b; 73).

Abstract: Watertight transducer for measuring the contraction of the uterus with a transducer casing, wich has on its underside a diaphragm made from a soft material, such as e.g. elastomeric plastic. The transfer of the uterine contractions takes place from the diaphragm for a ram to a dynamometer. The interior of the transducer is vented by means of a ventilating hose, whose opening to the external air is remote from the transducer, in order to avoid measuring errors as a result of temperature fluctuations.

Abstract: A transducer head for a medical instrument (e.g., a cardiotocographic instrument for performing extra-uterine ultrasonic supervision of the fetal heart function) having a housing adapted to be fixed, with the aid of a fastening device and abdominal belt, in a specific position relative to and in contact with the abdomen of a patient is characterized in that the fastening device comprises a bow pivotally attached to the housing and adapted to be locked relative to the housing in a position wherein the belt extends across the housing between the housing and the bow.