PURPOSE:To enable precise exhaust separation of solvent even if the degree of vacuum is changed due to the changes of column temperature or the flow of carrier gas. CONSTITUTION:A differential circuit 20 is connected through a resistor R1 to the output of a vacuum measuring circuit 12 while an integrating circuit 30 is connected through a resistor R3. Diodes D1, D2 and timer 16 are connected throu...

A process for manufacturing a patterned sheet from thermoplastic material, especially for floor coverings is described, which uses at least two different-coloured crude webs, punched insert parts from a first crude-web part-piece being inserted without punching play into the punched frame of a second crude-web part-piece of corresponding length and continuously welded with a repeated pattern by me...

A device for welding foils, webs or bags having differing thickness along a line to be welded at right angles to a conveying direction includes a pair of elongated welding dies movable relative to one another and one of which has an elongated, periodically heatable electric resistance heating element having serially-connected sections of differing electrical resistance along its length defined by ...

This method consists in preparing by extrusion an inner plastic tube (100) and in forming around the latter a metallic tube (300) which is covered by an outer plastic layer (900). The metallic tube (300) is formed to an internal diameter substantially greater than the external diameter of the inner plastic tube (100). This metallic tube (300) is closed by welding (40) edge to edge without overlap....

Benzene di- and tri-methanol compounds are selectively halogenated by reaction in aqueous solution at 70 to below 100 DEG C with HCl or HBr in the presence of a water immiscible solvent eg. toluene. The process is particularly suitable for the preparation of 4-bromo- and 4-chloromethyl-2,3,5,6-tetrafluorobenzene methanols which are believed to be novel compounds and useful in the synthesis of pest...

An endoscope apparatus comprises an endoscope (11) having a microwave antenna (27) provided at the distal end portion. The microwave antenna (27) is provided to selectively receive microwaves radiated from vital tissues in a body cavity and to radiate microwaves for treatment on the vital tissues. The microwaves radiated from the body are converted into biological temperature data corresponding to...

An electronic step counter is proposed which is arranged for being attached to a shoe (1). The step counter exhibits a step sensor (30) which is carried by the shoe and detects every step of the user. The sensor (30) is provided with a mounting plate (20) which is attached to the shoe (1). A counter (30) is removably arranged on the mounting plate (20) and contains electronic components which calc...

A monoblock for use in a dishwasher incorporates therein a tray-filter 1, pump impeller 4 and water softener compartments 2,3 for resin and salt respectively.

Silver catalysts providing improved selectivities for the oxidation of ethylene to ethylene oxide are prepared by (a) subjecting a catalyst comprising from about 1 to about 35 percent by weight of silver on a porous refractory catalyst support to a stabilization treatment, and (b) depositing from about 0.00004 to about 0.008 gram equivalent weights per kilogram of total catalyst of ions of one or ...

A slide 1 is generally rectangular and planar and has opposed longitudinal edges or parts 2 which are made from one, hardenable, stainless steel, and a body or remaining part 3 made from a relatively unhardenable, or soft, stainless steel. The whole slide 1 is precision ground and is corrosion resistant. The edges 2 are of V-shape the inclined surfaces 4 of the Vees being at 90 DEG . The precision...

A fastener is described in which a substantially rigid pillar formed at one of its ends with a radially enlarged head is provided with a number of radially projecting and longitudinally extending substantially rigid webs, the fastener being further formed with a number of thin plates arranged between adjacent webs in a plane or planes transverse or oblique to the axis of the pillar, the or each pl...

A coil forming machine comprises a coil former assembly for the formation of a coil therearound, a flier for winding a wire around the former assembly to form the coil and a coil receiving jig for the support of the coil which has been transferred from the former assembly. The former assembly is provided with a high frequency energy generator for converting electrical energies into mechanical ener...

In a control arrangement (13), several directional control valves (14, 15, 16) are connected to a neutral circuit (17). In the flow position, a first directional control valve (14) controls the entire pressure-medium flow, delivered by a pump (10), to a single-acting consumer. A pressure-medium flow reduced by an adjustable restrictor (33) arranged in the neutral circuit (17) passes to the directi...

A wire (6) made of aluminium or an aluminium alloy is passed through a capillary (5) and a first spark discharge is produced in a protective gas atmosphere between two auxiliary electrodes (12, 13). As a result of this the protective gas is ionised to form a plasma having such a low resistance that a spark discharge takes place between an electrode (11) and the wire (6) at a voltage of between 25V...

Microbubbles are formed in a liquid, e.g., blood in order to alter the transmission characteristics thereof to electromagnetic and sonic waves transmitted therethrough, by dissolving therein a solid particulate material, preferably as a suspension in a carrier liquid in which the particulate material is at least temporarily stable, the particles of which are substantially free of microbubbles and ...

1375190 Fermentation apparatus STANDARD OIL CO 28 Oct 1971 [30 Oct 1970] 20558/74 Divided out of 1375189 50198/71 Heading C6F A "bird-cage" cooling element for a fermenter consists of lower and upper headers 120, 121 Fig. 1, axially aligned and having substantially the same mean diameter, two concentric circular arrays of connector pipes 122, 122a connecting the headers, and an inlet and an outlet...

The invention relates to a vehicle with a box-like body and a removable roof, the roof of the vehicle (1) being designed as a boat hull (2) and being connected to the body so as to be detachable. The roof forming the boat hull (2) is constructed as a specific lightweight construction of an inner and an outer shell in which beads and/or swellings are integrally formed for reinforcement. The shells ...