There are disclosed refrigeration working fluid compositions comprising R125 (pentafluoroethane) or R152a (1,1-difluoroethane) refrigerants and certain polyol esters of C7 to C10 branched alkanoic acids or mixtures of such branched acids with linear C7 to C10 monoalkanoic acids. The polyols are neopentylglycol, technical grade pentaerythritol and trimethylolpropane; the esters exhibit suitable vis...

Biomaterials are disclosed comprised of biodegradable, biocompatible, and bioabsorbable composite membranes for use in surgery for the guided regeneration of tissues. The composite membranes are comprised of threads embedded in a matrix, wherein both the matrix and the threads can be comprised of esters of hyaluronic acid, used singly or in combination, or esters of hyaluronic acid in combination ...

The device for surgical treatment of astigmatism comprises an excimer laser (1) and a shaper (3) for distributing its radiation energy density over the cross-section of the laser beam (2). The shaper (3) consists of an optical cuvette (7), the windows (8, 9) of which are mounted rotatably around the axis (21) of the beam (2), their internal surfaces being surfaces of revolution of the second order...

The invention relates to a process for forming optical glass lenses. An electrically conducting grinding tool forms an anode and is connected to a positive terminal of a power source. The tool has the shape of the outer surface of the lens. A cathodic electrode connected to the negative terminal of the same power source is located in front of the working surface of the tool with a small gap betwee...

Il trovato si riferisce ad un dispositivo motorizzato di comando per una tenda a veneziana o simile posta all'interno di una vetrocamera.Esso è del tipo comprendente un primo magnete interno alla vetrocamera, e direttamente connesso al rispettivo sistema di comando, ed un secondo magnete esterno.Il secondo magnete è associato all'organo traslante di un cinematismo di trasformazione del moto rotato...

An architectural shutter curtain device having a train of a plurality of slats connected in series and adapted to be wound to form a plurality of turns on a take-up shaft of a polygonal shape having n apices. The width of the slats is varied in accordance with the change in the diameter of the wound shutter curtain device. In a group of n pieces of slats which form any one of the turns of the poly...

PCT No. PCT/GB92/00663 Sec. 371 Date Oct. 28, 1993 Sec. 102(e) Date Oct. 28, 1993 PCT Filed Apr. 13, 1992 PCT Pub. No. WO92/18053 PCT Pub. Date Oct. 29, 1992.Method and apparatus for testing an implant attached to a bone of a human or animal subject includes a member releasably attached to the implant. The member carries a transducer for exciting the member with a variable frequency AC signal, and...

A vertical blind having individual translucent vanes (4) suspended from a headrail include interior compartments (20) through which a portion of the transmitted light passes. The compartments (20) are created by bonding a corrugated or pleated sheet of material (18) to a flat, plane-like sheet (16) or by bonding two such corrugated or pleated sheets. The two sheets of material (18, 16) become the ...

A method of applying a decal onto, for example, a ceramic plate or wall plaque, uses a heat release decal without a cover coat which is made to be larger than the item to be decorated. When the decal is applied to the item only the part of the decal which contacts the item is taken up thereby, with the remainder of the decal, i.e. the excess surround, remaining on the application pad. In alternati...

Ferroelectric liquid-crystal mixture containing at least one compound of the formula I in which the symbols and indices have the following meanings: R<8> is alkyl or halogen, and R<1>[-A<1>-M<1>]m-A<2>-M<2> and M<3>-A<3>[-M<4>-A <4 ]n-R<2> are mesogenic radicals. The compounds of the formula I, even in small amounts, induce nematic phases, but have virtually no effect on important...

A refrigerant composition comprising an azeotropic mixture of trifluoromethane with hexafluoroethane which can offer a low temperature of -80 DEG C without using a restricted refrigerant which is likely to deplete the ozone layer, and which can be used as an alternative refrigerant to R503 in terms of refrigerating capacity and other performances. The invention relates also to a binary refrigerati...

Compositions of difluoromethane, 1,1,1,2-tetrafluoroethane, and 1,1,2,2-tetrafluoroethane are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polymers such as polyolefins and polyurethanes, and as power cycle fluids. Near azeotropic compositions comprise admixtures of effective amounts of difluoromethane and tet...

A method of joining a body 1 of crosslinked polyolefin to another body 3 formed of crosslinked polyolefin comprising the steps of heating the surfaces of the crosslinked polyolefin bodies 1 , 3 to be joined, to a temperature in excess of the crystalline melting point of the said crosslinked polyolefin, and bringing together said heated surfaces of the bodies 1 , 3 under pressure, and allowing the ...

Bei der Herstellung von großformatigen dünnen plattenförmigen Elementen aus einem abbindenden bei der Verarbeitung gießfähigen Material, insbesondere Gips, nach dem Ausstoßverfahren werden bewegliche Kerne (14) verwendet, durch die die Formkammern (11) nach dem Eingießen des Gießbreis in Teilformkammern (15) unterteilt werden. Aus den Teilformkammern (15) werden die plattenförmigen Elemente nach d...

The contact holder comprises a cylindrical body (2) of electrically insulating material formed with a plurality of seats (4, 6, 8) which can receive respective contacts (10). The body (2) has a first group of seats (4) located in a radial outer position and a second group of seats (6) located in a radially inner position. The body has an aperture (18) disposed in a radially inner position relative...

Bei Installationsgeräten sind zur Schnappbefestigung auf Montageschienen (1) Vorrichtungen mit Rastschiebern (2) bekannt, die auch mit Stützpunkten (9) zur Schraubbefestigung versehen sind. Die erfindungsgemäße Vorrichtung ist insbesondere bezüglich der Montage und Demontage eines Einzelgeräts verbessert, das im Verband mit weiteren Geräten und einer gemeinsamen Verschienung betrieben wird. Eine H...

A method for attaching a grooved precured tread 12 to a tire casing 10 and an apparatus to facilitate the attachment is described. A precured rubber tread 12 is applied to the tire casing 10 having a cushion gum layer 16 disposed between them. An envelope system 18 is placed over the tread 12 and casing 10 combination. The envelope system 18 includes a flexible membrane 18 and an air venting rigid...

In a drum-type slide magazine having a compartment body (11) which surrounds a magazine hub (1) and includes a plurality of radially extending compartment walls (15) to form slide compartments (17), the compartment body (11) is designed as a body separate from the hub (1) which is fixedly connected with said hub (1) by a connecting element (37).

Es wird eine Laser-Spiegeleinrichtung (10) mit einem deformierbaren Spiegelelement (14) und einem topfartigen Gehäuse (12) beschrieben, das zum Festhalten des Spiegelelementes (14) vorgesehen ist. Das Gehäuse (12) weist einen Vorraum (22) mit einem Wärmeübertragungs-Fluid für die Verlustwärme im Spiegelelement (14) auf. Zu diesem Zweck ist im Gehäuse (12) ein Kühlraum (24) vorgesehen, der vom Vorr...

An electrical connector includes a housing (20) having a plurality of cavities (22) receiving a plurality of terminals (40) therein respectively and a slide wall having an opening communicating to the terminal receiving cavities (22) and a retainer (30). The retainer (30) includes a body (31) engaged with the housing (20) and moved in parallel with it and lock strips (32) each coupled to the body ...