Abstract: A diamine compound of formula (I) is proposed as well as polymers, copolymers, polyamic acids, polyamic acid esters, or polyimides based on such compound.

Abstract: The invention relates to a drive, especially for rotary, pivotal or linear drive units, comprising a working piston (16), housed in a cylinder (12) of a housing (14), impinged by fluidic pressure media and displaced in the axial direction. The invention is characterized in that mechanical coupling elements (22, 24) are disposed on the working piston and can be coupled with a motor (30) in such a manner that the motor slows down and/or drives the working piston in the axial direction. The invention also relates to rotary, pivotal or linear drive units comprising said drive and to a method for operating a drive or a rotary, pivotal or linear drive unit.

Abstract: The invention relates to an expansion chuck comprising a base, a thin-walled expansion sleeve that is disposed in a final axial zone of the base and forms a central seat for a component that is to be clamped, and a clamping ring which surrounds the expansion sleeve so as to form an intermediate annular pressure chamber and is screwed to the base. Said pressure chamber is filled with a hydraulic means while the expansion sleeve can be elastically deformed for fixing a component within the seat by axially displacing the clamping ring, said clamping ring being twisted in relation to the base such that the volume of the pressure chamber decreases. The inventive expansion chuck is characterized in that the pressure chamber is filled wit a hydraulic means while a sliding ring element is placed between the ela: pressure surface of the clamping ring in order to transmit an axial con clamping ring to the solid body.

Abstract: A diamine compound is proposed as well as polymers, copolymers, polyamic acids, polyamic acid esters, or polyimides based on such compound. The compound is represented by one of the general formulae (Ia) and (Ib). It could be shown that such structures, in particular for a specific choice of the residue B, provide, if e.g. used as orientation layers, a photostable, vertically aligning material with an improved VHR.

Abstract: The present invention relates to an expansion chucking device having: a base body (2); an expansion sleeve (4) provided at an axial end region of the base body (2), which sleeve forms a central receptacle (5) for a component to be chucked; and a chucking ring (6) that surrounds the expansion sleeve (4), forming an annular pressure chamber (7) located therebetween, and is thread-joined to the base body (2), the pressure chamber (7) being filled with a hydraulic medium (11) and the expansion sleeve (4) being capable of being elastically deformed in order to secure a component in the receptacle (5) by the fact that the chucking ring (6) is axially displaced by rotation with respect to the base body (2), with a reduction in the volume of the pressure chamber (7), wherein multiple slits (4b) are embodied in the expansion sleeve (4) which extend in the axial direction and are spaced apart from one another when viewed in the circumferential direction, the expansion sleeve (4) being sealed off with respect to the pre

Abstract: A storage device which is suitable for presorting and having ready medicaments, particularly solid medicaments, and which is adapted to the medically prescribed, individual intake rhythm of the corresponding patients in such a way that the right dose can be administered at prescribed times without any problem. The storage device is in the form of magazines in which several receptacles (B) are stacked in semi-inclined position in a receiving container (A).

Abstract: The invention relates to a novel photoactive copolymer and its use as orientation layers for liquid crystals and in the construction of unstructured and structured optical elements and multi-layer systems.

Abstract: An optical component having a hybrid layer structure includes an orienting layer, a further layer in contact with the orienting layer and incorporating a cross-linked liquid crystalline monomer and at least one additional orienting layer on top of the liquid crystalline layer, and preferably includes one additional cross-linked liquid crystalline monomer. The layers have different functions, such as orienting or retarding. At least one of the orienting layers should be a photo-orientating polymer network layer, or have locally varying orienting pattern. These optical components are useful in transmittance and reflective liquid crystal displays, such as rotation cells, STN cells, ferroelectric cells, and cells having an addressable active matrix. Such cells are useful in optical and integrated optical devices, and may be used for safeguarding against counterfeiting and copying in transmission.

Abstract: The present invention relates to polymers of the general formula I: in which M1, M1′, M2 denote a recurring monomer unit from the group: acrylate, methacrylate, 2-chloroacrylate, 2-phenylacrylate; w, w1, w2 are molar fractions of the comonomers with 0<w≦1, 0≦w1<1 and 0≦w2≦0.

Abstract: Orientation layers of monomeric or polymeric liquid crystal layers having any desired azimuthal orientation direction and a tilt angle are produced by irradiating at an angle differing from the normal to the surface photopolymers orienting parallel to linearly polarized light.

Abstract: The invention solves the task of creating a temperature-controlled wire holder that enables a reliable and controlled release. This task is solved by the invention in that the wire holder (1) is produced from a shape memory material, and that the wire (14) is clamped in an aperture (2) of the wire holder (1) by compression of the aperture (2), and that the compressed aperture (2) opens by itself when the wire holder (1) is heated to a specific operating temperature, thus releasing the wire. The invention may be used in a temperature-controlled wire holder that releases a secured wire (14) under mechanical tension when a specific operating temperature is achieved.

Abstract: The present invention relates to an attachment device for a cryogenic satellite tank. In order to achieve adequate rigidity in such an attachment device while reducing the thermal conductivity and at the same time ensuring simple construction which is easy to realize from a technical point of view, so-called shape memory alloy elements are used. Due to suitable arrangement or interaction between a support element (1) and a connecting component (2) or a thermally controlled connection arranged in the support element (1) it is achieved that after the launch of the rocket, the SMA element automatically expands significantly in the cold space environment as a result of phase transformation, thus reducing surface pressure at respective connection points of the attachment device, and partly disengaging the contact. Consequently, the thermal flow via these connection points is reduced or completely eliminated.

Abstract: An optical component having a hybrid layer structure includes an orienting layer, a further layer in contact with the orienting layer and incorporating a cross-linked liquid crystalline monomer and at least one additional orienting layer on top of the liquid crystalline layer, and preferably includes one additional cross-linked liquid crystalline monomer. The layers have different functions, such as orienting or retarding. At least one of the orienting layers should be a photo-orientating polymer network layer, or have locally varying orienting pattern. These optical components are useful in transmittance and reflective liquid crystal displays, such as rotation cells, STN cells, ferroelectric cells, and cells having an addressable active matrix. Such cells are useful in optical and integrated optical devices, and may be used for safeguarding against counterfeiting and copying in transmission.

Abstract: A retention and triggering mechanism with a shape memory actuator which ensures safe triggering and is of simple design and requires little energy. An end (7, 8) of a stressed wire is held by a free end of a wire made of shape memory material (9, 10) which contracts along its length when heated, thus withdrawing its free end from an opening (27, 28) formed in the end (7, 8) of the stressed wire thereby releasing the stressed wire.

Abstract: The present invention relates to polymers of the general formula I: 1

Abstract: An optical component having a hybrid layer structure includes an orienting layer, a further layer in contact with the orienting layer and incorporating a cross-linked liquid crystalline monomer and at least one additional orienting layer on top of the liquid crystalline layer, and preferably includes one additional cross-linked liquid crystalline monomer. The layers have different functions, such as orienting or retarding. At least one of the orienting layers should be a photo-orientating polymer network layer, or have locally varying orienting pattern. These optical components are useful in transmittance and reflective liquid crystal displays, such as rotation cells, STN cells, ferroelectric cells, and cells having an addressable active matrix. Such cells are useful in optical and integrated optical devices, and may be used for safeguarding against counterfeiting and copying in transmission.

Abstract: The present invention relates to a semifinished product made from a shape memory alloy having a two-way effect, and to a method for manufacturing the same. An objective in this case is to produce a two-way effect in the shape memory alloy in simple fashion and using only few process steps, so that the semifinished product made of the shape memory alloy at the austenite/martensite phase transition, is able to pass through a large number of deformation cycles, and it exhibits high effect amounts, without requiring a protracted training of the shape memory alloy or externally acting forces. In one single deformation step, a linear, superelastic phase is additionally produced in the shape memory alloy, thereby introducing a restoring force to the shape memory alloy, so that, under the action of this restoring force, the shape memory alloy passes repeatedly through the deformation cycle during the austenite/martensite phase transition.

Abstract: The invention is concerned with novel cross-linkable, photoactive polymer materials with 3-aryl-acrylic acid esters and amides as well as their use as orienting layers for liquid crystals and for the production of non-structured or structured optical elements and multi-layer systems.

Abstract: An optical component having a hybrid layer structure includes an orienting layer, a further layer in contact with the orienting layer and incorporating a cross-linked liquid crystalline monomer and at least one additional orienting layer on top of the liquid crystalline layer, and preferably includes one additional cross-linked liquid crystalline monomer. The layers have different functions, such as orienting or retarding. At least one of the orienting layers should be a photo-orientating polymer network layer, or have locally varying orienting pattern. These optical components are useful in transmittance and reflective liquid crystal displays, such as rotation cells, STN cells, ferroelectric cells, and cells having an addressable active matrix. Such cells are useful in optical and integrated optical devices, and may be used for safeguarding against counterfeiting and copying in transmission.

Abstract: Orientation layers of monomeric or polymeric liquid crystal layers having any desired azimuthal orientation direction and a tilt angle are produced by irradiating at an angle differing from the normal to the surface photopolymers orienting parallel to linearly polarized light.