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 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 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: 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: An electrodeless low-pressure discharge lamp is provided with a lamp vessel which is closed in a gastight manner, which surrounds a discharge space, and which contains a filling of mercury and rare gas. The lamp vessel has a cavity and a collar where the cavity is open towards the exterior, an electric coil being accommodated in the cavity and support with an amalgam being arranged in the discharge space. The collar is made of metal and the support of the amalgam is fastened to the collar. This construction counteracts degeneration of the amalgam.

Abstract: The invention relates to a high-pressure discharge lamp provided with a discharge vessel which encloses a discharge space, which has a ceramic wall, and which is sealed at one end by means of a projecting ceramic plug which encloses with clearance a current supply conductor to an electrode arranged in the discharge vessel and is connected to said conductor adjacent an end facing away from the discharge space in a gastight manner by means of a melting-ceramic connection. According to the invention, at least an end portion of the ceramic plug situated near the end facing away from the discharge space is impermeable to light.

Abstract: The capped electric lamp has a quartz glass lamp vessel (1) having first and second neck-shaped portions (2,3) with respective seals (4,5). A glass envelope (9) surrounds the lamp vessel and is secured thereto. A clamping member (20) surrounds the envelope in a clamping manner. A fixation member (32) of a lamp cap (30) is welded to the clamping member. The clamping member (20) is an undulated metal body, the crests of its creases constituting regions (22) which are spaced from the envelope (9) and in which welds to the fixation member (32) are made. Its troughs constitute clamping zones (21) which hold the envelope. The clamping member (20) allows for the application of a relatively wide envelope (9), which may enter the lamp cap (30).

Abstract: The capped high pressure discharge lamp includes a light source (1) having a lamp vessel (1') with a first neck shaped portion (2) to which a lamp cap (30) is fixed. A connection conductor (7) runs alongside the discharge vessel to connect a second current supply conductor (5) extending from a second neck shaped portion (3) to a second contact member (36) of the cap. The lamp vessel (1') is contained by a tubular outer envelope (20), which is filled with air and does not envelope the connection conductor (7). The outer envelope (20, 50) has a narrowing portion (21, 52, 51) which encloses the second current supply conductor (5) or a neck shaped portion (2, 3). The outer envelope is maintained. The lamp is of a simple construction which allows for optimizing the light output or the temperature of the lamp vessel.

Abstract: A wide angle objective system is described for, inter alia CCD cameras, which system is compact, inexpensive and satisfactorily corrected. It comprises a front meniscus lens (L.sub.1), a thick convex-concave central lens element (L.sub.2) and a biconvex lens element (L.sub.3), the two last-mentioned elements preferably being cemented together, the pupil (P) being present at the area of the exit surface (4) of the second lens element and the first and the third element (L.sub.1,L.sub.3) being made of, for example PMMA and the second element (L.sub.2) being made of, for example PC.

Abstract: A picture tube and lens system are combined to form a picture display device for use in a projection device. The lens system is mounted in an extension of the tube envelope.

Abstract: Picture display device (1) comprising an illumination system (3) and a picture display panel (7) which is provided with a matrix of pixels. The picture display panel (7) may be a transmissive or a reflective picture display panel. In the case of a transmissive picture display panel, a first microlens array (19) is arranged at the illumination side of the picture display panel (7), and a second microlens array (21) is arranged at the side of the picture display panel (7) remote from the illumination system (3). In the case of a reflective picture display panel, the picture display device (1) comprises only one microlens array (61) which is arranged between the illumination system (3) and the picture display panel (7). In both cases, the number of lenses (23, 25; 63) of a microlens array (19, 21; 61) corresponds to the number of pixels (27) of the picture display panel (7).

Abstract: An image projection apparatus which comprises an illumination unit, an image display unit, a projection lens and an electro-optical deflection unit arranged between the display unit and the projection lens and being switchable between a first mode and a second mode and comprising a polarization switch and a birefringent element, whereby the light rays from the display unit passing through the deflection unit if the deflection unit is in the first mode are shifted relative to said light rays passing through the deflection unit if this unit is in the second mode. The birefringent element comprises at least one birefringent oriented polymer layer.

Abstract: The electric lamp has a lamp vessel (1) having first (2) and second (3) opposed necks, each having an end portion (4). Current conductors (7) extend from an electric element (5) having an axis (6) through a respective neck (2,3) and end portion (4) to the outside. Mounting members (10, 11) are secured to each of the necks (2,3), remote from the end portions (4). Each mounting member has a first metal body (20) which is fixed to the neck in a selected area. A second metal body (30) is secured to the first metal body (20), and has an aligned surface (31) which is in at least one of three perpendicular directions (x,y,z) in an aligned position with respect to the electric element (5). Each mounting member furthermore has a third metal body (40) having references (12) which is secured to the aligned surface (31), such that its references (12) are in a predetermined aligned position with respect to the electric element (5).