Abstract: An electro-stimulation apparatus comprises an electrode system for measuring local electrical impedance. The electrode system includes a multitude of electrode pads and a counter electrode held at a reference voltage. The electrode pads and the counter electrode are assembled in an electrode unit. A particular embodiment of the electro-stimulation apparatus comprises an electronic circuit including a source group of electrode pads and a sink group of electrode pads and a source conductor for applying a first electrical quantity to electrode pads of the source group. The electronic circuit also includes a sink conductor for receiving a second electrical quantity from electrode pads of the sink group. Switching elements couple individual electrode pads of the source group to the source conductor. Other switching elements couple individual electrode pads of the sink group to the sink conductor.

Abstract: In a massaging apparatus (1) with two rotatable rollers (14, 15), which are spaced apart transversely to their roller axes (16, 17), at least one of the rollers being rotationally drivable by a roller drive motor (25), and with a suction chamber (39) disposed in the area of the two rollers (14, 15) and communicating with a pump (50) via an air-transfer line (49) for generating a vacuum in the suction chamber (39) so as to form a skin fold (57) which is drawn into the suction chamber (39), there has been provided a control device (80), preferably formed by an electropneumatic vacuum switch, which is responsive to a partial vacuum and which communicates with the suction chamber (39), the roller drive motor (25) being adapted to be turned on under control of the control device (80) when a given vacuum is reached in the suction chamber (39).

Abstract: A food processor is provided having a motor (18), a bowl (10) and a beater (12) which are movable relative to each other by a drive by the motor (18), a switching means (48) for switching the motor (18) on and off under the control of a start signal (START) and at least a first stop signal (STOP1) respectively, torsion measuring means (28/30, 32/34) for producing a torsion signal (TS) which is a measure for the torque necessary for the drive, a signal processing unit (42) for producing at least the first stop signal (STOP1) in response to the torsion signal (TS). The signal processing unit (42) includes a first differentiator (56) and/or a second differentiator (58) for producing the first (DTS) and the second derivative (DDTS) of the torsion signal (TS) and a comparator (62) in which the first (DTS) or second (DDTS) derivative is compared with a reference value (REF1). When the reference value is exceeded, the comparator produces a stop signal (STOP1) to switch off the motor (18).

Abstract: A control device (30) for controlling the supply of power to the coils (16A, 16B) of a drive motor (3) for a compressor unit of the resonant-piston type (1). The control device comprises a power-supply circuit (44) for energizing the motor coils from a direct voltage source (45), means (46, 47, 48; 46, 60) for determining a measure (P, .phi.), which indicates whether the power consumption of the motor as a function of the frequency of the energizing current is at least approximately maximal, and means (40, 42, 43; 61, 42, 43) for adjusting the frequency of the energizing current, depending on the derived measure (P, .phi.), to a value for which said measure indicates that the power consumption of the motor (3) is maximal.