Abstract: The balancing of rotors for dynamo-electric machines (e.g., electric motor armatures) is achieved by attaching a balancing strip to the rotor after an impregnation resin has been applied to the wire coils, and the unbalance of the rotor has been measured. To create the balancing strip, a material supply selectively and incrementally delivers a predetermined quantity of material, such that the quantity of material has a mass sufficient to compensate for the measured unbalance of the rotor. The predetermined quantity of material is separated from the material supply to form a balancing mass, and the balancing mass attached to the rotor to compensate for the measured unbalance. A mounting member having a recess may be preliminarily attached to the rotor for subsequent attachment of the balancing mass thereto. A second material supply may be provided such that a controller can select between the first and second material supplies.

Abstract: Methods and apparatus for generating a linear vibratory output force having a variable amplitude. The force is generated by the cooperation of four rotating eccentric masses that are grouped in two pairs of two masses. The masses in each pair are counter-rotating (i.e., they rotate at the same speed but in opposite directions). The phase relationship between the two pairs is adjustable. For example, the phase of one pair can be advanced while the phase of the other pair is retarded by an equal amount, thereby changing the amplitude of the output force without changing the direction along which the force acts, and also without changing its frequency if desired.

Abstract: A warranty registration method for a wireless remote unit in a communication network is provided wherein the communication network includes a wireless network and a message center. Initial activation of a wireless remote unit prompts retrieval of warranty information specific to the wireless remote unit. A message is constructed based on the warranty information and subsequently transmitted to the message center. The message center receives the warranty information and transfers it to a warranty center.

Abstract: Scan testing of logic circuitry is facilitated by providing register circuits, each having an input gate configured to selectively pass a data s signal applied to that register, a master stage configured to store a data signal passed by the input gate of that register, an interstage gate configured to selectively pass a data signal stored by the master stage of that register, and a slave stage configured to store a data signal passed by the interstage gate of that register. Inter-register gates are operatively arranged to selectively pass a data signal stored by the master stage of an associated respective first one of the registers to the master stage of an associated respective second one of the registers for storage by the master stage of that second one of the registers. During normal operation, circuitry is configured to alternately enable the input gates and the interstage gates, and to disable the inter-register gates.

Abstract: A high pressure sodium discharge lamp includes first and second discharge devices electrically connected in series within an outer envelope. The discharge devices each include a discharge vessel enclosing a discharge space with an ionizable fill and first and second discharge electrode assemblies. The first discharge electrode assemblies of the discharge devices are connected so as to receive a starting pulse and lamp operating voltage. Each discharge vessel includes a first wall portion spaced from the first discharge electrode assembly and defining an ionizable gap therebetween. A conductive element bridges the discharge devices at the first wall portions and capacitively couples the first discharge electrode assemblies to induce ionization in one of the discharge devices in the ionizable gap between the first wall portion and first discharge electrode assembly.

Abstract: A high-pressure discharge lamp is disclosed having a discharge vessel, an outer bulb enclosing said discharge vessel and defining an intervening space therebetween, a UV-enhancer positioned in the space between the outer bulb and the discharge vessel, the UV-enhancer provided with a wall fabricated of a ceramic material and an internal electrode, wherein an end portion of the UV-enhancer is closed with a compressive seal.

Abstract: A color image projection apparatus comprising a plurality of (LC) image display panels (33), each operating with light of a different color (R,G,B), whose outputs are combined by combining means (24, 25) and projected via a lens (28) onto a screen (32) and electro-optical deflection means, comprising a birefringent element (40) following the combining means and preceded by polarization switch means (42) operable to displace slightly the outputs from rows of pixels in each of the panels in either the odd or even fields so as to produce an interlaced image on the screen. Considerably improved performance is achieved by providing a respective, separate, polarization switch element between each display panel (33) and the combining means (24, 25), and preferably closely adjacent to the output side of the display panel.

Abstract: A glowswitch starter according to the invention is provided with a discharge vessel (1) which is closed in a gastight manner and which has a wall (2), with a pair of electrical conductors (3a, 3b) passed through a portion (2b) of the wall of the discharge vessel, and with a bimetal element (4a) in the discharge vessel which is conductively connected to one (3a) of the electrical conductors (3a, 3b), the discharge vessel containing an ionizable filling. The glowswitch starter according to the invention, which is characterized in that at least that portion (2b) of the wall through which the electrical conductors are passed is made from a glass containing at least 5% BaO by weight, has a short ignition delay time.

Abstract: A reflector lamp having a lens of vitreous material fused to a reflector body of vitreous material. An inner reflector surface of the reflector body includes a reflective coating having a first coating portion extending from the rim of the reflector body and a second coating portion extending from a location spaced from the rim towards a basal end of the reflector body. The second coating portion is a layer of heat-treated silver having a uniform, whitish non-metallic appearance and being diffusely reflective. The first coating portion is a layer of material other than silver, such as aluminum, having a higher resistance to damage by high heat in the rim area during fusing of the lens to the reflector body.

Abstract: The Electric lamp has a lamp vessel in which an electric element is accommodated, connected to current conductors which emanate from the lamp vessel. At least one of the current conductors has a length portion which is a solidified melt and in the area of which portion the current conductor has a kink. As a result of the conductor having a kink the electric element is aligned in the lamp vessel. The lamp can be obtained by melting the current conductor, e.g. by means of a laser, in the finished lamp.

Abstract: The line-illumination device has a carrier (1), a plurality of tubular lamps (2) and a screen (5). Mounting brackets (7), which may be mounted to the screen (5) in any area of its length, are coupled to the screen (5) and to suspension brackets (6), which are coupled to the carrier (1) in a free area thereof. The suspension brackets (6) have a first hole (60) which extends up to the circumference of the bracket, and which may have a narrowed portion adjacent said circumference. A first pin (73) of the mounting brackets (6) is supported in said hole (60) and may be unround so as to be able to pass through the narrowed portion of the hole (60) in a rotational position which is different from rotational positions in which the pin (73) is supported in the hole (60). The construction of the device allows for an easy and fast assembling.

Abstract: The invention relates to a switchable cholesteric filter. Said filter comprises an optically active layer which is situated between two substrates which are both provided with an electrode for applying an electric field. The optically active layer comprises a liquid-crystalline material which is in the cholesteric phase. In accordance with the invention, the optically active layer comprises a three-dimensional polymer network which consists of the polymerization product of maximally 2 wt. % of monomers with at least two polymerizable groups and maximally 30 wt. % of liquid-crystalline monomers with one polymerizable group, and the rest of the optically active layer consists predominantly of a mixture of chiral and achiral liquid-crystalline molecules. An optically active layer of this composition can be switched in a simple and reproducible manner by means of an electric field. The invention also relates to a luminaire comprising such a switchable cholesteric filter.

Abstract: A rear projection screen which includes a front lenticular surface, a diffusion region behind the lenticular surface, a non-diffusion region behind the diffusion region, and a rear phase grating surface, when used with high magnification projection systems, exhibits reduced speckle when compared to other rear projection screen without such a grating.

Abstract: A luminaire has a housing with a light emission window (2), a tubular lamp supported in the housing facing the window (2) and having a center line extending in a plane P perpendicular to the window (2), side reflectors (5), and three-dimensional lamellae (10) which each have an outer edge (11) and a pair of inner edges (12). The outer edge of each lamellae is concave in a direction transverse to the window. The luminaire thus provides an optimized cut-off angle, screening light which would otherwise be dazzling but permitting non-dazzling light to pass. Each of the lamellae has a concave curvature in a direction parallel to the plane P but which flattens out going from plane P towards the side-reflectors (5). That enlarges the aperture through which light emanates and makes the illumination provided by the luminaire more uniform.

Abstract: A method of manufacturing a pattern of conductors on a polyimide base is disclosed. After the conductors have been formed in known manner, ridges of an insulating material are formed in the metal free zones by applying, exposing and developing a UV-sensitive resist. Subsequently, metal is deposited on the conductors between the ridges, which prevent short circuits.

Abstract: A capped electric lamp is disclosed having a cap of insulating material. The cap has a base provided with concentric contact faces which are separated by a circumferential channel. The shell of the cap has a first axial portion near the base, which has a circumferential groove and a diameter smaller than the diameter of a second axial portion remote from the base. A third narrowest axial portion may be present adjacent the base and a fourth axial portion between the first and the second, having an intermediate diameter. The capped lamp may be mounted in an electrically safe, slim push-in/push-out lampholder.

Abstract: The invention relates to an electric lamp provided with a body which radiates light in the operational state of the lamp and which is enclosed with intervening space by an outer lamp envelope which is provided at one end with a stemtube with a pinch and which supports a lamp cap shell, through which pinch current lead-through conductors extend, each current lead through conductor being connected to a contact point of the lamp cap shell via an external conductor. According to the invention, each of the current lead-through conductors and the accompanying external conductors is provided with a moisture-repelling coating at least at the area of a mutual welded joint.

Abstract: In a color liquid crystal projection display in which three differently-colored illuminating beams (R,G,B) are incident from mutually different directions on an LC panel (20) having an array of display elements (40) with a microlens array (21) at the input side of the panel end of whose elements (42) overlies a respective group of three adjacent display elements in row or delta configuration and through each of which light of the three colours (R,G,B) is directed at different angles respectively and converged towards respective ones of the display elements in its associated group, a deflecting element array (25), comprising, for example, microlens element (44) or microprisms (46) formed in a glass substrate of the panel, is positioned close to the plane of the display elements to deflect the directions of light of at least two of the three colours from each microlens element (42) to bring the directions of light of the three colours at the output side of the panel towards a common direction, and preferably su

Abstract: The push-in/push-out lampholder has a guide track for an unlocking member which is permanently coupled to a fixation member. The guide track may be heart-shaped and be partly traversed by the unlocking member when a lamp cap is pressed into the lampholder. The lamp cap must be released if it is to reach an operational position under the influence of a spring. The fixation member permanently coupled to the unlocking member is then in engagement with a profile of the lamp cap and retains the lamp, pressed against contact members. It is not until a second, separate push is given that the unlocking member continues its path through the guide track. In a special embodiment, the fixation member and the unlocking member are combined into an integrated member, which may be a ball which is enclosed in inwardly narrowing bores of a cylindrical ball holder and in the guide track. The lampholder can be slim and can be manufactured mainly from metal or from synthetic resin.

Abstract: The invention relates to a high-pressure metal halide lamp provided with a discharge vessel with a ceramic wall enclosing a discharge space. The vessel has a cylindrical portion of internal diameter ID which is closed off at either end by end wall portions which form end faces of the discharge space. At least two electrodes are arranged in the discharge vessel, whose respective tips have an interspacing EA such that ##EQU1## The electrodes have lead-throughs which are enclosed in ceramic closing plugs and are connected thereto in a gastight manner by means of ceramic glazing joints.According to the invention, the rated lamp power is at most 100 W, and an electrode tip lies substantially in the adjacent end face. A closing plug is fastened in the relevant end wall portion in a gastight manner at a distance from the end face.