Abstract: A pressing apparatus for a winding machine for winding printed products supplied in scale formation has two pressing belts (5.1, 5.2) which together cover at least 270.degree. of the roll periphery. Uniform, strong contact pressure on the roll is exerted which can be controllable. Groups of components guiding and supporting the belts are movable to completely withdraw the belts from the roll, allowing a full roll to be ejected easily and a new mandrel to form a new roll can be loaded in a short time.

Abstract: An endoscope for transurethral surgery and has a main body irrotationally supporting an optics and a surgical instrument, further an outer tube affixed to the main body and tubularly enclosing the optics and the surgical instrument, which is characterized in that the outer tube is rotational relative to the remaining endoscope parts.

Abstract: A continuously variable transmission in which a transmission unit provides a variable speed ratio between an input member (2) and an output member (3). The output member drives an output transmission member (11) by way of a power recirculation system (7-10) in a first regime of the transmission, through a selectable transmission path (30-34) providing a fixed ratio drive from the input member to the output transmission member, and having a selectable regime which provides a transmission path (19-23) from the output member to the output transmission member. The transmission is arranged so that only a clutching operation is required to effect a synchronous changeover between regimes.

Abstract: A method and apparatus for selective detection of gases and vapors uses paramagnetic and electric dipole moments. An inhomogeneous magnetic field (31, 32, 33, 33') or an inhomogeneous electric field (41, 42, 43, 43', 44, 44') through the gas sample causes molecule enrichment in the acoustically sensitive range (34) of an ultrasonic resonator (1). The ultrasonic resonator has mutually opposed ultrasonic transducers operating as a transmitter (2) and a receiver (3). Because of the change in acoustic velocity, the molecule enrichment causes detuning of the ultrasonic resonator (1) and hence a change in signal at the receiving transducer (3). The method is particularly sensitive to the detection of oxygen.

Abstract: A replacement cartridge (1) for a shaver with an application device has an application preparation reservoir (2) and means for feeding the application preparation such as a small manually operated pump (3), and a connecting piece (10). The replacement cartridge is fixed to the shaver by a coupling between the connecting piece (10) and a counterpart (4). In the new state of the replacement cartridge, the interior of the small pump (31) is filled with application preparation. The integration of the small pump into the replacement cartridge (1) and its initial filling with preparation permits a simple design of the pump. The pump has a pump chamber (31) whose walls have elastically deformable points and two one-way valves (32, 33). A preparation reservoir has a hollow body whose interior is subdivided into a preparation chamber (22) and an air chamber (23) by a movable plunger (21).

Abstract: Process and device for preparing for analysis a gas mixture consisting of at least two components. The gas mixture is passed through at least two adsorption beds (3', 4'). At least one adsorption bed loaded with at least one constituent is fitted in a desorption device located upstream of the inlet system of an analyzer unit in which the constituent(s) are desorbed by lowering the pressure and/or raising the temperature.

Abstract: The inventive method and apparatus serve to combine into groups different printed products supplied as continuous flows (1, 2, 3 etc.), on at least one grouping section (10.1, 10.2, 10.3), in which each group can have a composition of in each case one product from different supply flows corresponding to a predetermined group sequence. The production of faulty groups is prevented, in that in the supplies errors are detected at an early stage, so that groups affected by an error, are not formed in the predetermined cycle and are instead displaced by one cycle. The group flow leaving the method consequently contains only gaps and not faulty groups. For performing the method between the supplies (63.4, 63.5) of products and the grouping (10.1, 10.2) are introduced a supply control, a supply buffer storage and a controlled delivery. The means (64.2, 64.3, 64.4 etc.

Abstract: The identification system operates by the contactless, inductive transmission of information via oscillatory circuits coupled by an electromagnetic field. Excitation is produced by pulses representing the information; the pulse response is utilized. The associated apparatus has one or more pairs of oscillatory circuits (A1/B1;A2/B2;A3/B3) and means (21, 22, 23) for processing the pulse response. A position recognition process transmits test information which is used for the sequential short-circuiting of an oscillatory circuit on the receiver side. This oscillatory circuit behaves like a damped/undamped body as a function of the test function. The partner oscillatory circuit on the transmitter side is excited at, for example, twice the frequency of the test frequency and its pulse response contains the test function through the defined damping behaviour. If the test function is again recognized as a result, the connection is correct and write or read operation is released.

Abstract: A needle shielding and use-facilitating apparatus has a first sleeve with a coupling at one end for attachment to a syringe and a hypodermic needle carried by the first sleeve. The needle extending beyond the opposite end of the first sleeve. A second sleeve is slidably received in the first sleeve and surrounds part of the needle which extends beyond the first sleeve. A spring in the first sleeve urges the second sleeve out of the first sleeve. An end coupling is attached to the second sleeve and is selectively attachable to any of a plurality of articles puncturable with the needle.

Abstract: In an edge detector process, a working plane (A) is scanned by a focussed light beam, e.g. a laser beam emitted by a light source (L) projected at an angle of typically 40.degree. to 45.degree. from the working plane. A first and a second detector (D1, D2) receive the scattered light from the working plane. The first detector (D1) is positioned behind a focussing imaging optics (0), such as an off-axis parabolic mirror, which is arranged coaxially, i.e. all round the laser beam, or is positioned below the emitted light beam relative to a main working plane (H). The second detector (D2) is positioned approximately over the light spot produced by the emitted light on the main working surface. The stray light measured by the first detector (D1) is therefore received at an angle to the main working plane, which is equal to or smaller than the angle between the emitted light and said plane.

Abstract: A method for testing a semiconductor integrated circuit soldered into a printed circuit board makes use of the existence of parasitic transistors which occur on integrated circuits having diodes formed thereon. The method includes applying a voltage across the pins of the integrated circuit to be tested, measuring currents resulting from the voltage applied across the pins of the integrated circuit, connecting a transistor tester to selected pins of the integrated circuit, and determining typical control or switching characteristics of a parasitic transistor (1T, 2T) of the semiconducting integrated circuit (IC1, IC2). A commercial transistor tester is usable to perform the method.

Abstract: A telephone system uses above voice-band ASK control and supervisory signals which are appended to digitally encoded voice by forcing the least significant bits to a selected level for transmission to the receiving end. At the receiving end, the ASK is regenerated by a circuit including special filter and a pulse generator. To eliminate audible noise resulting from the filter action, the ASK signal or the pulses from the pulse generator is shifted in phase by about 90.degree. before application to a filter. The result is significantly reduced noise.

Abstract: A device for defining a plane to determine relative elevations comprising in combination a stationary housing (7) having an aperture (8) and locating a pair of vertical reflecting surfaces (6) at right angles to each other which may be a pair of mirrors (5) or a right angle prism (32) and a levelling rod or staff (14) adapted to be positioned at a vewing distance from the housing (7) and incorporating a light source (12) and an eyepiece (15) whereby an observer at the location of the levelling rod (14) can move the light source (12) up and down the levelling rod (14) until a reflection of the light from the light source (12) is seen in the pair of reflecting sufaces (6). A reading can then be taken on the levelling rod (14) at a point midway between the eyepiece (15) and the light source (12) which defines a horizontal line from the reflecting surfaces (6).

Abstract: An assembly for supporting and storing an intravenous supply tube and coupling device having a septum includes an elliptical body capable of having the tubing wound thereon and first and second flanges extending radially outwardly from the body. Each flange includes one or more slots for removably receiving the tubing and securing the tubing in place. The assembly is able to hold the tubing and coupling in place while a hypodermic needle is inserted into the coupling to shield the operator's hand to thereby reduce the risk of injury to the operator. In further embodiments two or more assemblies are coupled together in a ganged fashion.

Abstract: The gripper (1) has gripping arms (8), which are located on a membrane (3). Between the grippers the membrane has an area (14), which is movable roughly at right angles to the membrane. Through the movement of this area the gripping arms can be inclined relative to each other and can pick up an article (15).

Abstract: On-hook VF transmission through a channel unit to a subscriber telephone instrument is provided by a control unit which generates control signals for the channel unit. The control unit responds to receipt of an "idle" code by creating commands which establish a VF path through the channel unit regardless of whether the subscriber instrument is on-hook or off-hook.

Abstract: Electrophoresis apparatus for conducting electrophoresis in submerged gels, comprises a plurality of compartments including at least one gel compartment and at least one reservoir compartment; a plate as the bottom of a gel compartment, electrodes only in a gel compartment; the electrodes arranged in such a way that during operation the created electric field is confined essentially within a rectangular box, the said rectangular box defined on sides by side walls or barriers, on top by air and on bottom by the plate; means to circulate buffer; and barriers in a gel compartment mounted on the plate in front of buffer circulation openings.

Abstract: A process for the preparation of stabilized glycoproteins without the introduction of foreign molecules. Susceptible monosaccharides covalently attached to the protein part of the molecule undergo periodate oxidation and, after elimination of the remaining periodate, the oxidized glycoprotein is incubated in a buffer under conditions favorable for the reaction between the aldehyde groups generated in the sugar part and the amino acid residues from the protein part. The oxidized carbohydrate chains act as a polyaldehyde crosslinker, with the cross-linking reaction producing intramolecularly and intermolecularly linked derivatives. The amount and size of the intermolecularly linked derivatives are controlled by degree of oxidation and protein concentration. The thermal stability, depends on the degree of oxidation and under optimal conditions is about 10 times better than the stability of native invertase.

Abstract: A "Y" adapter for supplying power to a marine vessel from a dockside power center having two receptacles includes two three-pole plugs insertable into the receptacles, a third four-pole plug for connection to the wiring system of the vessel and a sensing and control unit for selectively switching paths between these plugs. All conductor lines are switchable to the third plug and between the input plugs by a voltage and phase sensing unit and contactor arrangement. Energization of one input plug while the other one is plugged into a receptacle is prevented and other dangerous voltage circumstances are also prevented.