Abstract: A tensioner for the chain or the belt of an internal combustion engine, for example of the camshaft drive, includes a cylindrical tensioner housing (2) with a piston (1) loaded by a compression spring (13) arranged therein, the tensioner housing and the piston being axially displaceable relative to each other. The displaceable element which is displaceable relative to the fixed element in chain tensioning direction, is surrounded by a first stop ring which limits its backward movement. According to the invention, the first stop ring is configured as a retaining clip (15) whose arms engage into a locking groove (16) of the tensioner housing (2) under radial pre-stress and, upon a displacement thereof, can come to bear axially against a stop surface of the receiving housing (3).

Abstract: A device, for use in a press, for feeding fasteners, especially nuts, and attaching the fasteners in workpieces by pressing with a punching head. Joining and pressing of the fasteners in the workpieces takes place, with an infeed and loading means on a tool or press part, and on a rigid feed, which together with a punching head can be attached to one of two antagonistic tool or press parts. A first conveyor section for the fasteners is located between the punching head and the loading means, and forms the fasteners. Each of the fasteners is supplied individually to a loading position of the loading means and each is moved by an infeed element from the loading position into a subsequent first conveyor section, forming a row which extends into the punching head, in which the fasteners tightly abut one another.

Abstract: A rocker arm (1) or finger lever for a valve drive of an internal combustion engine is provided in which a guide bushing (7) is press-fit in a receptacle hole (2). The guide bushing (7) has a bore (9) in which an outer part (4) of a hydraulic play compensation component (3) is guided in a sliding manner. The guide bushing (7) has a radially inwardly directed projection (10) which holds a shoulder formed by a diameter reduction of the outer part (4) from behind or meshes in a groove of the outer part (4). This arrangement allows the hydraulic play compensation component (3) to be secured from loss using the press-fit guide bushing (7).

Abstract: A hydraulic clearance compensation element free of prior art disadvantages and manifesting substantially higher sink values over a wide range of temperatures.

Abstract: A process for depositing catalytically active platinum metal layers from an ionogenic, acidic, platinum metal ions-containing solution which further contains sulfonic acid. This activation leads to more uniform catalyst layers with greater surfaces which are catalytically more efficient. The process according to the invention can be implemented in any chemical process utilizing platinum metal catalysts, e.g. chemical synthesis, environment applications or metallization of surfaces.

Abstract: The clearance compensation element (1) of the invention which can be installed, for example, in a valve drive of an internal combustion engine has a certain idle stroke function for undesired overpressure states of its high pressure chamber (12) during a base circle phase of the actuating cam. According to the invention, a valve means (14) such as a ball which closes the high pressure chamber (12) in the direction of a reservoir (10) is freely movable within certain limits. The ball (14), while being extremely light, closes the valve seat bore (13) with the shortest possible stroke immediately upon commencement of the opening ramp (A.sub.N) of the cam.

Abstract: A valve actuating lever for a valve drive of an internal combustion engine, includes a main body formed therein with a bore and a shaft received in the bore of the main body and defining a pivot axis about which the main body pivots, to thereby control up and down motions of a gas exchange valve in response to travel of a cam mechanism. The shaft has an outer surface area formed with tangential undercuts oriented transversely to the pivot axis and formed through non-cutting shaping process.

Abstract: A device for securing an actuating lever, e.g. a finger lever, of a valve control mechanism of an internal combustion engine to a support element, with the actuating lever being formed with a concave recess receiving a spherical end of the support element for allowing the actuating lever to pivot relative to the support element includes a connecting element received in an undercut of a displaceable piston of the support element and having a thickness which is smaller than a width of the undercut to effect a free movement of the connecting element within the undercut in all pivoted positions of the actuating lever.

Abstract: A xenon excimer (Xe.sub.2) radiation source for producing vacuum ultraviolet (VUV), broad-band, molecular radiation of wavelengths shorter than 200 nm includes fluorescent materials for excitation by the VUV radiation and illumination purposes. The fluorescent materials include a mixed borate with the general formula: (Y.sub.x Gd.sub.y Eu.sub.z)BO.sub.3 ; a mixed aluminate with the general formula: (B.sub.a Eu.sub.y)MgAl.sub.10 O.sub.17 ; a mixed aluminate with the general formula: (Y.sub.x Gd.sub.y Eu.sub.z).sub.3 Al.sub.5 O.sub.12 ; a mixed silicate with the general formula: (Y.sub.x Sc.sub.y Tb.sub.z).sub.2 SiO.sub.5 ; a mixed borate with the general formula: (Y.sub.x Gd.sub.y Tb.sub.z)BO.sub.3 ; and a mixed phosphate with the general formula: (Ln.sub.x Ce.sub.y Sc.sub.w Tb.sub.z)PO.sub.3.

Abstract: A finger lever for a valve drive of an internal combustion engine which finger lever is contacted in a central region by a control cam and cooperates at one end with a gas exchange valve in the opening direction while being pivoted at another end by a bore on a shaft for pivoting relative to a cylinder head of an internal combustion engine by means projecting radially beyond a peripheral surface of a shaft in the region of a surrounding cam follower.

Abstract: The invention concerns a hydraulic play-compensation element including a groove (11) in the housing (1) to be located in such a way that, whatever the position of the plunger (2), a length (19) of the plunger is always supported by the cylinder wall above the groove and the securing ring (12) is centered radially around the plunger by means of a recess (14) in the plunger, the recess having a ramp at least at its lower end. The invention thus avoids weakening of the material in the upper part of the plunger.

Abstract: In order to achieve a disturbance-free and accurate supply of elements to be conveyed to a metal sheet and/or panel, with a minimum mounting height, a device is disclosed for a tool mounted in a press for fastening bolt-shaped elements, in particular screws, on a metal sheet or panel. The device has a punching head, a fixed member for supplying the elements arranged in opposite rows to the punching head, and a rigid connection between the tappet channel of the punching head and the concatenating station (loading device). A loading bushing acts as a loading device, taking up the elements individually in a fixed orientation and then concatenating them in the head station.

Abstract: A method of leakproof first filling of a hydraulic valve actuating tappet (1) with hydraulic oil,a) comprising almost completely filling the central oil reservoir (7) together with a high pressure chamber (18) situated axially between the bottom (11) of the pressure piston (10) and the guide sleeve (5), and the annular oil reservoir (17), with hydraulic oil, andb) filling at least the supply bore (19) leading to the annular oil reservoir (17), with a lubricating grease or a pasty material (20) which is flow-resistant at ambient temperature.

Abstract: There is disclosed a filtration unit for the selective separation of substances from fluids by membrane adsorbers, comprising a plurality of filtration chambers arranged in parallel and using membrane adsorber packs having a variable number of porous laminar sections, and wherein at each membrane adsorber pack, the same pressure drop is maintained between feed and permeate.

Abstract: This chart recorder with n or m (n, m=1, 2, 3, . . . ) measuring channels, one for each of n or m measurement signals to be recorded, has a printing device (5) or m continuous-line recording devices (31, 32) which produces/produce n equal colored dot sequences (8), each associated with one of the n measurement signals, or continuous lines (8', 8") each associated with one of the m measurement signals, as measurement curves on a recording medium (4, 4') moving past it/them. Those portions (81; 81', 81") of the dot sequences or continuous lines which are currently being formed lie behind a covering portion (51, 51') formed by the printing device (5) or the continuous-line recording devices (31, 32) and/or by other components of the chart recorder, and are invisible.

Abstract: The novel mechanical valve tappet of the invention arranged in a guide bore of a cylinder head of an internal combustion engine is comprised of a cup-shaped housing with a hollow cylindrical wall (1) closed at one end by a bottom (2) which is contacted exteriorly by a control cam while a first flat end face of an adjusting element (7) bears against an inner surface of the bottom (2), a second flat end face of the adjusting element (7) which is parallel to the said first flat end face is in contact with an end of a valve stem of an engine valve, and the adjusting element (7) has a cylindrical peripheral surface and is retained by force engagement in a bore (6) of a hub (3) fixed to the said inner surface of the bottom (2), characterized in that an element (9, 11, 15, 16, 20, 21, 22, 26) which is resiliently biased with respect to the adjusting element (7) and the hub (3) is arranged between the hub (3) and the adjusting element (7).

Abstract: A finger lever or a rocker arm (4,25,39) for a valve actuating mechanism (1) of an internal combustion piston engine comprising a roller (5) which rolls against the periphery of a cam (3) and is rotatably mounted on a pin (17) guided in side walls (18,19) of the finger lever or the rocker arm (4,25,39) which is provided with a bore (23) directed towards the periphery of the roller (5) and communicating with a lubricant duct (38), characterized in that the bore (23,27,43) has a diameter of .ltoreq.0.5 mm in the region of its smallest cross-section.

Abstract: A chart recorder is disclosed which has n (n=1, 2, 3, . . . ) measuring channels, one for each of n measurement signals to be recorded, a printing device (5) which produces n isochromatic dot sequences (8) as curves each associated with one of the n measurement signals on a recording medium (4) moving past it, and 1 to n writing devices (9) for 1 to n different colors which overwrite or underwrite one or more of the dot sequences (8), at least in sections, with a continuous line (10) of another one of the n colors which follows the measurement signal of the respective channel, or a color-printing device (15) for 1 to n different colors which marks selected dots of each curve with dots (18) of another one of the n colors. Thus, the n dot sequences (8) are clearly distinguishable one from the other, particularly at curve intersections, and additional functions, such as alarm markings, can be realized.

Abstract: A mechanical valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine, which valve tappet comprises a cup-shaped housing with a hollow cylindrical wall (1) closed at one end by a bottom (2) against which a control cam runs from the outside while an adjusting element (5) bears against the inner surface of the bottom by a first flat end face and is in contact with the end of a valve stem of a two-way gas valve by a second end face which is parallel to said first end face, characterized in that the adjusting element (5) is a solid component with a cylindrical outer peripheral surface and parallel end faces, projections being provided on the cup-shaped housing to cooperate with the cylindrical outer peripheral surface of the adjusting element so that the adjusting element (5) is retained by interlocking or by force engagement on the cup-shaped housing.

Abstract: A tensioning device for belts, chains and the like, particularly for toothed belts in the valve drive of internal combustion engines, the device comprising a support which can be fixed on the engine block and on which, firstly a lever carrying a pressure-contact roller is pivotably mounted, secondly, a tensioning element is arranged which presses against the lever via a piston and thirdly, a stop member is arranged which is displaceable parallel to its longitudinal axis from a mounting position into an operating position and in the mounting position blocks the stroke of the piston in an intermediate position by a stop surface and allows a free travel of the piston in the operating position, characterized in that the stop surface is formed by a lateral surface of the stop member which is parallel to the longitudinal axis of the stop member.