摘要:
A stack of layers reflecting heat radiation for transparent substrates comprises at least one silver functional layer and, on both faces of the latter, antireflection layers formed by one or more metal compounds. The antireflection layer under the silver layer comprises an upper partial layer of zinc oxide contiguous to the silver layer, and an additional partial layer, under the zinc oxide layer, which is formed by aluminum nitride and is under internal tensile stresses. With the aid of the AlN layer under tensile stresses, it is possible to compensate the internal compressive stresses existing in the ZnO layer.
摘要:
A process for producing a composite constructional element from a basic body made of plastic which is provided with ribs and is partially or completely connected to a reinforcing element made of metal or reinforced plastic. In this process, the connection of the basic body and reinforcing element to form the composite constructional element for the transfer of shearing, torsional, flexural and tensile/compressive stresses takes place at a subsequent time in a separate work step.
摘要:
In a dissecting instrument for surgical operations a working instrument such as a blade with cutting edge is fastened to a holding device such as a handle. Coagulation devices are provided, with a gas-supply apparatus to supply an ionizable (noble) gas and current-conducting means to supply an HF coagulation current. It is proposed to mount electrode devices that form part of the current-conducting means in such a way that they are separate from the working instrument but nevertheless close to it, and to make the working instrument electrically insulating so that the coagulation current can be guided to the tissue without being conducted through the working instrument even while the latter is in contact with the tissue.
摘要:
Industrial yarn PA 6.6 comprised of filaments having a global yarn count of at least 900-2100 tex, which is made by submitting wet granulate PA 6.6 to a melt spinning-drawing process, is characterized by a strength of >84 cN/tex for less than 1.5 linters/1 km. Said yarn is used preferably in the production of cord fabric with a rubber ply.
摘要:
The invention relates to a circuit arrangement for operating a lamp (EL), particular a low-pressure discharge lamp, with a load circuit which has at least one inductor (L2) and at least one capacitor (C7, C8, C9), and with an invertor which may be configured as a half-bridge arrangement with two switching elements (T1, T2), and with a drive circuit (AS) for driving the switching elements (T1, T2). The invention provides that the drive circuit (AS) has at least one LC parallel tuned circuit (L3C3, L4C4). The circuit arrangement according to the invention can be produced without separate cost-intensive wound parts.
摘要:
A device for exhibiting flat articles consists of a profiled frame, which surrounds a picture on all sides round its outside. A flange is formed on an inwardly directed web of the profiled frame which is in register with a further web running parallel to the rear side of the picture frame, the flange facing towards the viewer and having a sheet of glass fixed to its end, the glass closing the profiled frame on the side facing the viewer. The picture is pressed against the side of the web facing away from the viewer by elastic pads, which bear against a rear wall connected to the rear side of the profiled frame. The edge and the marginal region of the sheet of glass are received by a rectangular recess of the picture frame. Since the inwardly directed web is in register with the outwardly directed further web, the face side of the picture is located in a plane behind the rear side of the picture frame. The device according to the invention can protect a picture from damage and also against environmental effects given an air-tight implementation of the frame receiving the picture, while the overall impression of the picture and the picture frame stays virtually unchanged and reworking of the picture frame to receive the profiled frame is dispensed with.
摘要:
Sulfonamides of the formula I ##STR1## where A is an unsubstituted or substituted aromatic or heteroaromatic radical; W is oxygen or sulfur; B is an unsubstituted or substituted furyl, thienyl, pyrrolyl, oxazolyl, isothiazolyl, imidazolyl, pyrazolyl, thiadiazolyl, oxadiazolyl or triazolyl radical, and the environmentally compatible salts thereof are prepared as described and are used as herbicides.
摘要:
Show case (1) for keeping and exhibiting objects, the sides (4), the bottom (3) and the cover construction (2) of which encompass the interior of the show case more or less hermetically, wherein filter means (7) comprising preferably dust and/or gas protection filters and being accommodated in an air vent (5) clean air flowing into or being directed into said show case. When air flows in automatically due to changed pressure and temperature conditions inside and outside the show case, the show case is vented preferably through an air vent (6, 9) formed as an outlet valve. When it is impossible to seal the show case sufficiently, it will be ventilated forcibly with the least possible quantity of air by means of a pump or ventilating device connected to the interior of the show case through the filter means, which quantity of air is adapted to the air volumes flowing automatically into the show case when the air pressure increases suddenly or the temperature varies.
摘要:
The barrel housing of a multistage centrifugal pump has an elongated cylindrical main section and a discrete annular section which is inserted into one end portion and defines an annular shoulder facing the other end portion of the main section. The shoulder is engaged by the inner casing of the pump. The annular section can constitute a prefabricated component or is formed by cladding. The inlet opening of the housing is provided only in the one end portion of the main section, only in a portion of the annular section which extends outwardly beyond the one end portion of the main section, or is a composite opening having a first part in the one end portion of the main section and a registering second part in the annular section. The outlet opening for compressed fluid is provided in the other end portion of the main section.
摘要:
The housing of a pump, compressor, heat exchanger or another part which is subjected to thermally and/or otherwise induced expansion and contraction has several spaced-apart legs or analogous portions movably secured to a base plate or the like so that the legs are movable along straight or arcuate paths intersecting each other at or close to a fixed reference point within or without the confines of the part. The base plate has discrete guides for the legs of the expandible and contractible part, and such guides are designed to allow the respective portions to move along the corresponding paths toward or away from the reference point, depending upon whether the part contracts or expands. The guides can be slotted or recessed, or they may constitute rotary components having eccentric sections extending into openings of the respective legs.