Abstract: An apparatus for generating water currents in a swimming pool is provided in which an intake chamber, a discharge channel and a pump impeller are contained within a common housing. The discharge channel is defined within an open-ended discharge tube which extends longitudinally within the cylindrical housing. In use, the pump operates to suck water into the intake chamber around the tube through the front end of the housing. The water flows around the rear end of the discharge tube into the discharge chamber where it is expelled forcibly into the swimming pool through the discharge outlet at the open front end of the discharge tube. A pump stator member with radially extending guide vanes is provided in the discharge tube in front of the impeller to reduce swirling in the discharge channel. A safety guard may be provided over the inlet and the outlet at the front end of the housing.

Abstract: Body traction table for treatment of, among other things, back problems that includes a stand presenting a front stand portion (1) and a rear stand portion (2) and supporting a body-supporting table (13) and a footrest (8) which together revolve round a mainly horizontal axis in order to turn the body-supporting table (13) from standard position in which the footrest (8) is lowered into treatment position in which the footrest (8) is above the horizontal axis, the body-supporting table (13) being supported by a frame (5) which is pivotally connected with the stand. At least one of the stand portions (1, 2) is adjustable for height so that the front stand portion (1) can be made shorter or longer than the rear stand portion (2).

Abstract: A method and a resulting device for mounting a semiconductor to a submount by depositing a first layer of a first metal solder having a selected first melting point and corresponding thickness onto a surface of the semiconductor. Depositing a second layer of a second metal solder having a selected second melting point higher than the first melting point and a corresponding selected thickness onto a surface of the submount. Disposing the semiconductor surface and submount surface in confronting intimate contact and heating the submount and semiconductor to a temperature greater than the first temperature and lower that the second temperature for initiating and promoting liquid interdiffusion between the first and second solders.

Abstract: A self-drying insulation system for a pipe or a container (1) which has a temperature that is periodically lower than the dew point temperature of the ambient air includes an inner capillary-active slot between the surface of the pipe or container (1) and a surrounding heat insulating layer (3) in which one or more capillary-active openings (5) are provided, these openings connecting the inner side of the insulating layer (3) with its outer side, and a water-repellent membrane (6) surrounding the outer side of the insulating layer so as to form an outer slot (7) between the outer side of the insulating layer (3) and the membrane (6).

Abstract: A case for accumulators in which side walls lying in perpendicular planes are connected by a connecting wall. The intersecting planes define a corner and external profile for the container. An adduction tube is formed integral with the outer surface of the connecting wall within the profile.

Abstract: A method of depositing material on a surface (136) is described in which a bulk medium (for example ink 122) in the form of a composition of dispersed insoluble material (for example ink particles) and a support medium is supplied to a cell (120). A movement of the insoluble material within the bulk medium is effected towards a transfer aperture (128) within the cell, thereby concentrating the insoluble material within the bulk medium. Thereafter the insoluble material is removed from the concentration within the bulk medium through the aperture (128) and deposited onto the surface (136).

Abstract: A wheel hub with suspension includes a carrier arm, a swivel axle and a hub body rotatably secured to the swivel axle. A resilient element is positioned between the carrier arm and the swivel axle. A load on the wheel or the hub body will cause the swivel axle to be displaced relative to the carrier arm, whereby the resilient element is deformed and exercises its resilient effect. The wheel hub may be used in many different applications and for many different types of wheels, such as wheels on vehicles, driving wheels, and support wheels.

Abstract: A grinding/polishing cover sheet for placing on a rotatable grinding/polishing disc (3) consists of a thin foil (1), to which a coating (2) of a hard composite material has been applied through a stencil with or without an associated serigraphic membrane. The foil (1) is stiff in its own plane, but flexible perpendicularly thereto. The composite layer may consist of a matrix of artificial resin with one or more substances embedded therein, e.g. particles of one or more metals or ceramic materials, or fibers or particles of synthetic substances or graphite. The foil can be held in position on the grinding/polishing disc (3) by magnetism or by glueing.

Abstract: An strain measuring apparatus for analyzing the stability of a steel structure and a method thereof employs a controller for receiving a variation difference amount from the strain gauge input unit measured using a strain gauge between a strain degree obtained by applying a weight to a steel structure and a strain degree obtained by applying a weight to a steel structure having a hole formed at a predetermined portion and measuring a strain existing in the steel structure based on the variation amount using particular equations. A control command input unit inputs an initialization command for initialing the existing strain measuring apparatus, a radius of the hole formed in the steel structure, a distance between the center of the hole and the center of the strain gauge attached to the steel structurc and an external operating signal including a proceeding command which represents a testing procedure into the controller.

Abstract: At a machine for the establishing of a design--track position with a machine frame which runs on chassis and with a working unit coupled thereto, a measuring unit is in accordance with the invention directly placed on the machine frame for the working unit, resp. The measuring unit is, thereby, connected to a control device which controls the working unit in accordance with at least one parameter height position, lateral position and transverse inclination via a adjusting drive. The measuring unit includes an absolute measuring system for a registering of geodetically surveyed fixed points.

Abstract: A waist belt has opposite free ends which can be buckled together. A pair of fabric loops are disposed at the free ends and define holes for attachment to a tether. A pair of adjustable thigh straps are supported below the belt. Seven connectors are supported on the belt at locations along the belt adjacent to strategic musculo-skeletal points of the pelvis. The connectors are disposed adjacent the left and right anterior superior iliac spines, the left and right iliac crests, the left and right posterior superior iliac spines and the sacrum of a user when the harness is in use.

Abstract: A microelectric position sensor wherein an assembly of magnetic field sensitive elements assume first and second states when subjected to a magnetic field having an intensity below or above first or second predetermined values respectively. A magnet is selectively movable relative to the assembly, so that the elements are selectively subjected to the magnetic field. The magnet has focusing tongues for focusing the magnetic field at a region including substantially only one of the elements, so that the magnetic field within the region has an intensity above the second value, and the magnetic field outside the region has an intensity below the first value.

Abstract: This invention provides apparatus and a method for measuring the concentration of alumina in a molten electrolyte in a smelter. A test anode (101) (a mimic of the actual cell anode) supplied from a computer-controlled voltage source (303) with several to about (100) rapid cyclic voltammetry sweeps the voltage at which the anode effect occurs, as sensed by current measurement (305). In order to derive a measurement the voltage is compared within the computer (301) to previous measurements made from a calibration set of alumina samples in known concentrations. Brief rapid cycles and an improved electrode configuration help to provide results from the invention which are reproducible and accurate, and in addition the test electrode has a long life.

Abstract: A railroad switch stand is provided for operating a railroad switch between two positions. The switch stand comprises a connecting rod connected to an operating mechanism for causing reciprocation of the connecting rod, and a handle connected to the operating mechanism for pivotal movement about a pivot axis between two operative positions. The handle has an open framework having an external configuration which is generally triangular in shape, with the apex of the triangle disposed at the inner end of the handle part where it is connected to a stub portion of the handle. With this configuration, the outer end of the handle presents a portion extending upwardly which can be easily grasped by a railroad personnel when it is desired to throw a switch.