Abstract: The bimetal thermoswitch consists of an electrically insulating, flat carrier (1), at least two electric terminals (3, 4) which are secured to the carrier (1) and are respectively connected to a fixed contact (10), which is mounted on the carrier, and to a contact spring (8), which is secured at one end to the carrier (1) and at its other end carries a movable contact element (10), which cooperates with the fixed contact (10). The carrier (1) consists of an alumina ceramic slab.

Abstract: An implant having a surface coating of growth factors for animal or human cells, wherein the growth factors are covalently bonded to bonding-active groups of a polymer on the base body of the implant.

Abstract: A carrier for the cultivation of animal and/or human cells in a fermenter, comprises a polymer base body of a solid formed into a pressure-resistant matrix, with a capillary system for carrying the liquid cell culture medium therethrough, with no cell growth occurring therein, and with interstices for three-dimensional cell growth therein, growth factors for the cells being covalently bonded to the boundary surfaces of the interstices. The carrier can provide a high level of cell density of the order of magnitude of 10.sup.9 cells/ml, by three-dimensional cell growth.

Abstract: Means for preventing relative twisting between a seal ring and the parts of structure accommodating it by providing that in connection with high pressure shaft seals, the axial thrust resulting from the action of the pressure of the seal ring on its low pressure side radial face is taken up by a number of projections, the cross section of the seal ring undergoing undulating deformation as seen in the circumferential direction owing to the axial flexure of individual parts of the seal ring; it is furthermore possible to have additional projections as means for preventing twisting. As a consequence of the undulation of the entire cross section of the seal ring there will also be the useful effect of undulation of the seal interface edge, constituted by parts of this cross section, on the high pressure side.

Abstract: An arrangement for sealing that point at which the axially movable rod of a hydraulic device passes through its housing wall, comprises a sealing ring consisting of a tough-elastic plastic material or a harder elastomeric material and a stressing ring consisting of a softer elastomeric material, the two rings being accommodated jointly in a groove in the housing wall in such a manner that the sealing ring projecting from the groove is in contact with the axially moving rod, while the stressing ring seals the sealing ring against the circumferential face of the groove. The sealing ring is provided, on its inner surface facing the rod, with two axially offset annular sealing edges. The annular space between these two sealing edges is connected with the outer surface of the sealing ring by a channel. The channel opens at a point where it is covered by the stressing ring and which is located near the high-pressure end of the common contact face of the sealing ring and the stressing ring.

Abstract: A silyl-enol ether of the formula ##STR1## wherein n stands for the number and X stands for a group ##STR2## or n stands for the number 1 and X stands for the 6,11-dimethylhexadeca-2,4,6,8,10,12,14-heptaene-2,15-diyl group, the symbols R.sup.1 have the same or different significances and denote alkyl groups, and the symbol R.sup.2 represents a trialkylsiloxy group --OSi(R.sup.1).sub.3 or an ether group,is oxidized with percarboxylic acid and, if desired, the resulting .alpha.-siloxy ketone is hydrolyzed to an .alpha.-hydroxy ketone. This process is especially suitable for the manufacture of astaxanthin.

Abstract: A process for the production of a suspension of doped polyacetylene particles, in which process acetylene is initially polymerized in a suspending agent with the formation of a suspension of polyacetylene particles in "burr" form, the catalyst is deactivated or removed, the solvent is optionally exchanged, and p- or n-doping is then carried out by adding a dopant additive in substance or in solution to the suspension.

Abstract: A filtering nozzle for injection molding purposes comprises two parts (1,9), one of which having a bore (6) and the other one a tubular portion (10) fitting within said bore. The tubular portion has internal, annular and axially spaced grooves and has in its outer, envelope surface a number of substantially axial grooves (18) each having such a depth that it penetrates the wall of the tubular portion at the zones of the tops of the internal grooves thus generating a multitude of openings (19) in said tubular portion. By means of channels (7,8,20,21) the plastic melt is directed through the nozzle such that it passes through said openings (19) of the tubular portion. The nozzle parts are screwed into each other, making assembly and dismantling easy.

Abstract: In packings for hydraulic pistons or piston rods with a packing ring comprised of a tough elastic synthetic material as the contact packing between a stationary machine part comprising an annular groove and a moving machine part comprising an initial slope and of a rubber clamping ring clamping the packing ring radially and providing a sealing action with respect to the annular groove in the stationary machine part, an annular surface is located between the end face of a step at the high pressure side and a conical surface adjoining the latter on the low pressure side, which annular surface forms an obtuse angle with the conical surface of such a value that when the packing travels in over the initial slope the resultant F.sub.res of the normal force F.sub.N and of the frictional force F.sub.R halves the sealing edge angle. When using conventional materials and conventional angles for the conical surface and the inlet slope, a value of 45.degree.

Abstract: A temperature-controlled bimetal switch is formed of a flat housing with an upper wall and a lower wall closely spaced apart. A fixed contact is secured to the inner surface of the upper wall and a curved bimetal snap plate and a contact spring are positioned between the upper and lower walls. The housing is formed of a transparent or translucent rigid plastics material permeable to radiant heat. A movable contact is formed on one end of the contact spring and is displaceable into and out of contact with the fixed contact by the snap plate. The snap plate is loosely secured to the contact spring and is positioned so that radiant heat passing through the housing directly impinges on the snap plate.

Abstract: The compound 5[4(acyloxy or protected hydroxy-3-oxo-2,6,6-trimethyl-cyclohex-1-en-1-yl)-3-methyl-penta-1,4-dien- 3-ol], an intermediate for the coloring agent astaxanthin, its conversion to astaxanthin and its preparation from 4-oxo-.beta.-ionone including intermediates in this synthesis.

Abstract: A device to connect an ejector device, of an injection molding machine, to an ejector pin of a mold used with the machine. The device has a holder with jaws which are radially movable therein for clamping and unclamping the ejector pin introduced into the holder. A spring urges the jaws towards the clamping position, and the jaws can be moved to the unclamping position by a manually operable actuator. A latch can hold the jaws in the unclamped position, and the holder has a releasing element mounted in it and arranged so that when actuated by the ejector pin it allows the spring to bring the jaws into the clamping position to lock the ejector pin.

Abstract: In an ejector pin assembly for injection moulding tools the ejector pin plate is positively retracted and locked in its rear position by providing the tool with a rearwardly extending hollow housing, having an inner annular pocket, by slidably arranging in said housing a slidable member, being connected to the ejector pin plate and having radial holes for receiving cupling elements such as balls, segments or the like, by arranging in said housing a spring operated member, which normally prevents the coupling elements from penetrating said sliding member inwardly and by securing to the generally stationary ejector means of the injection moulding machine an ejector rod, which near its free end has an annular groove into which said coupling elements may enter when said rod has been introduced in the housing and the spring operated member as a consequence thereof has been displaced such that it does not any longer cover said openings.