Abstract: A latent heat-storage device for cooling purposes includes a non-deformable closed container, and a heat-storage medium comprising water or a eutectic aqueous solution of a salt contained in the container. The heat-storage medium expands in volume as its temperature is lowered through its phase transition from fluid to solid. The amount of the heat-storage medium is such that a part of the container volume equals or is slightly larger than the maximum volume expansion of the heat-storage medium during operation of the device. A gas condensing between room temperature and the melting temperature of the heat-storage medium fills the container part at atmospheric pressure and room temperature.

Abstract: An apparatus such as a dry shaver comprises a housing formed by two opposing housing sections accommodating an electric motor therewithin. A first outwardly extending mounting rim and a second outwardly extending mounting rim are provided on the electric motor, the second mounting rim being spaced from the first mounting rim. The first and second mounting rims engage the two housing sections and axially retain a part of each housing section therebetween. An axially directed edge portion is provided along the periphery of the first mounting rim and engages the two housing sections to radially retain the same therebetween.

Abstract: A heat exchanger comprises a vertically arranged circular-cylindrical holder closed at its upper end and at its lower end, and a pipe coaxially arranged within the holder. A fin is secured to the inner pipe and consists of a plurality of interconnected lamellae extending radially from the pipe, the fin being helically wound around the pipe so that the adjacent lamellae of successive turns of the resulting helix overlap each other in part, viewed in the circumferential direction of the pipe. A capillary passage is located in each lamella above the surface of an underlying lamella in a position shifted with respect to the capillary passage of the underlying lamella.

Abstract: A method of renewing a used liquid for reuse of the same includes establishing a body of a reference liquid for comparison with renewed used liquid, and establishing a separate body of the used liquid adjacent the body of reference liquid. An incident light beam is produced for consecutive traversal of the body of used liquid and the body of reference liquid, the particles in the two liquid bodies thereby diffusing the light beam to provide respective luminous fluxes off the axis of the incident light beam. The two luminous light fluxes are separately detected and compared. This procedure is automatically terminated when the detected luminous light fluxes are substantially equal to each other.

Abstract: A corkscrew comprises a sleeve coaxial with a corkscrew spiral and formed to cooperate with a bottleneck provided with a cork. An electric motor drives the corkscrew spiral by means of a reduction gear, the corkscrew spiral being capable of being screwed into the cork in one direction of rotation with the cork being drawn from the bottleneck without the direction of rotation being reversed, the reduction gear providing a reduction ratio of 60:1 to 100:1, the electric motor being a self-starting two-pole single-phase synchronous motor with a diametrically magnetized permanent-magnet rotor. A reversible unidirectional latch is situated at the driven side of the corkscrew spiral for defining the direction of rotation of the motor, such unidirectional latch cooperating with a part of the reduction gear driven by the motor with an integral reduction ratio. Provision is made to reverse the blocking direction of the unidirectional latch to select one of the two directions of rotation of the motor.

Abstract: A hair-grooming device comprises a hollow elongate holder having a comb or brush attachment fitted onto one end portion thereof. A high-voltage source is enclosed in the holder for ion-generation. An elongate conductive support is mounted in and insulated from the holder and electrically connected to the high-voltage source, such support extending parallel to and opposite the attachment. At least one row of electrodes extends outwardly from the support toward the holder. There is a slot-like opening in the holder adjacent the attachment for each row of electrodes, the electrodes in each row extending toward the corresponding opening for escape of the formed ions through such opening to the exterior of the holder.

Abstract: A vibratory dry-shaving apparatus comprises a housing; a bipolar, uniphase, synchronous motor positioned within the housing and having a rotor and a stator; and a shaving head arranged on the housing and including a vibratory cutter part below a fixed cutter part. A wall separates the interior of the housing from the shaving head, such wall having a passage therethrough. A swing lever is driven by the rotor and engages the vibratory cutter part to drive the latter, the swing lever extending through the passage. An elastic sleeve surrounds the swing lever and seals the passage between the edge thereof and the swing lever. The elastic sleeve is asymmetrically designed so that, in a final end position of the vibratory cutter part where the magnetic fields of the rotor and the stator are parallel, no force resulting from deformation of the sleeve is exerted on the vibratory cutter part.