Abstract: A sensorless and brushless DC motor in which phase-corresponding coils are turned on at an electric angle of 180.degree..The driving circuit of the DC motor includes comparators for outputting position detection signals, comparators for outputting turn-on signals, power transistors for turning on phase-corresponding coils, a rotation direction control section, a charge/discharge control section, a charge/discharge section, a turn-off signal generating section, and transistors for forcedly turning off the power transistors.

Abstract: A contact chain structure, for troubleshooting integrated circuits of EPROM memories, of a type comprising cluster contacts connecting metallization layers to active areas of the circuit, comprises a source-drain region implanted centrally of each active area. Deposited over that region is a gate region which, on being biased, enables the conductive condition of the chain to be varied.

Abstract: An engine for an outboard engine assembly includes a cylinder block with at least one horizontal cylinder defined therein, an oil pan disposed downwardly of the cylinder block, a cylinder head coupled to the cylinder block, and a head cover coupled to the cylinder head. The engine assembly also includes a valve operating mechanism chamber defined jointly between the cylinder head and the head cover, a lubricating oil supply passageway for supplying lubricating oil from the oil pan to at least the valve operating mechanism chamber, and a lubricating oil return passageway for returning lubricating oil from at least the valve operating mechanism chamber to the oil pan. The lubricating oil return passageway has openings for introducing lubricating oil from the valve operating mechanism chamber. The openings are defined in inner surfaces, respectively, of the cylinder head and the head cover which face a bottom of the valve operating mechanism chamber.

Abstract: A yoked magnetic structure has a pair of spaced magnetized members defining a cavity, and an end ferromagnetic structure closing said cavity and abutting an end of the magnetized members. The end structure comprising at least a first element of triangular cross section having one side abutting an end of one of said magnetized member and a second element of triangular cross section having one side abutting the adjacent side of said cavity. The first and second elements have second sides away from the magnetized member and cavity defining at least part of an equipotential line whereby the flux density on the side of the equipotential line away from the magnetized structure is zero. A region of .mu.=.infin. material is provided adjacent the magnetized member to minimize the effect of perturbations.

Abstract: A permanent magnetic structure comprising a cylindrical body (15) and a termination structure (14, 12, 10). The cylindrical body (15) is composed of magnetic material causing a magnetic field and flux of magnetic induction. The cylindrical body (15) is oriented such that the interface between the cylindrical body 15 and the termination (14, 12, 10) is parallel to the magnetic induction and the cylindrical body (15).

Abstract: A multimode oscillator is disclosed which employs a single gain feedback loop for exciting at least two modes of a resonator to cause the oscillator to oscillate simultaneously at at least two frequencies. The multi-mode oscillator comprises the resonator, an amplifier to provide gain at the appropriate operating frequencies to support simultaneous oscillation at such frequencies and an equalizing network with amplitude and phase characteristics versus frequency to support the simultaneous modes of oscillation. The single loop oscillator permits separate control of the two simultaneous different frequencies of oscillation. In order to minimize thermal hysteresis, at least the active portion of the feedback loop does not include inductors. In some applications, the multimode oscillator may include one or more rejection networks to suppress unwanted oscillations. The useful outputs of the multimode oscillator are one or more of the operating frequencies, harmonics and intermodulation products.

Abstract: A movable shelving system comprising a locking system that automatically activates when a rack is moved a short distance and that allows a user to reset or open the lock at any time. A scissors type element is mounted across adjacent racks and is connected via a slip clutch to a drive rod such that separating the racks causes the rod to rotate displacing a bracket which toggles a locking device.

Abstract: A detection system is disclosed for a mobile storage system which causes the storage system to prevent movement of a storage element whenever a person is detected in an aisle between storage elements. The detection system uses a presence or motion detector for detecting the presence of a person in an open aisle without direct contact between the person and the detection system. Preferably, a radar transceiver operating in X-band is positioned to overlie each open aisle to detect presence of movement of a person in an open aisle, even slight movement such as breathing. The storage system in which the detection system is connected prevents any closing movement of a storage element adjacent an aisle in which a person is detected so as to avoid frightening the person in the aisle.

Abstract: An electrical connector is provided which, when attached to a printed circuit board, will not cause removal of a cream solder that has been applied to the circuit board, and which will not flaw the surface of circuit portions. The connector has a resilient arm which undergoes elastic deformation to flex contacts perpendicularly away from the surface of the circuit portions when the circuit board is inserted into the connector. The resilient arm is restored to its original shape when the connector has been correctly fitted on the circuit board, thereby allowing the contacts to contact predetermined circuits. In another embodiment, the resilient arm is replaced by a frame member which is urged into the connector body by the circuit board. This causes the contacts to part perpendicularly from the surface of the circuit portions.

Abstract: The present invention provides heater equipment for heating to high temperature and intended to be mounted on a rigid mechanical support (66) in particular the table of a press for manufacturing products made of plastic material or of composite materials. The equipment comprises a heat distribution plate (60) which is heated in multiple zones by a heater submodule (61) comprising a plurality of one piece flat metal-clad heater elements (62) which are spaced apart by spacer blocks (63) and which are distributed over at least three different zones. Each heater element (62) includes at least three resistances (X1, X2, X3). The heater zones are fed with electric power independently from one another by electronic power feed means for each zone, with the power being fed as a function of predetermined references for each zone in co-operation with temperature sensors.

Abstract: A system for authenticating a hard copy of an original document. The system employs a special copying machine at the sender's end together with a special ID card (smart card) or other user identification for activating the special machine, and a special copying machine at the receiving end. At the sender's station, the original document and ID card are inserted into the machine. The latter digitizes the document text, to produce a digital signature which incorporates unique information from the sender's ID card. This machine then produces a hard copy of the document to which is added the digital signature. The sender retains the original, but forwards the copy to the recipient or receiver. The receiver then inserts the received copy into the machine at his location, which digitizes and processes the document text and signature and indicates whether the digital signature is valid.

Abstract: A homokinetic coupling wherein the torque transmitting elements include spherical elements flattened at two mutually opposed points, the flattened elements being in contact with the side walls of open slots within the wall of the hollow spherical element of the inner coupling member.

Abstract: A digitizer tablet exhibiting improved regional error correction comprises evaluation of two linear equations to correct the generated raw coordinates. The equations contain certain constants unique to tablet regions exhibiting similar error patterns. These constants are empirically determined and stored for use in the evaluations.

Abstract: A roller bearing cage is made of a bent strip of sheet metal having abutting ends that are connected to one another, the cage being comprised of two end rings and a cage frame surrounding the windows, the windows retaining and guiding the rollers. In order to permit the manufacture of rolling element bearing cages of different reference circle diameters while using only one tool for rolling elements with a specific diameter d, the center distance between adjacent the cage windows in the circumferential direction is .pi.d/2.

Abstract: A digitizer tablet is provided in which the working surface is illuminated by a light source which includes optical structure located over the grid or electrode array of the position determining structure of the digitizer to provide a surface-lit tablet, or beneath the grid or electrode array to provide a back-lit tablet. Preferably, a space is provided adjacent the working surface to reduce undesirable lighting effects. A fiber optics panel or an electroluminescent panel may be used as the optical structure placed above or beneath the grid to illuminate the working surface. The position determining structure and the optical structure may be integrated into a single unit to form a digitizer with an illuminated working surface, or the optical structure may be provided as a separate unit for use with a digitizer to provide an illuminated working surface for the digitizer.

Abstract: A resistance training device which includes a boom which may be connected at a variety of positions to a frame. The boom is provided with a curvilinear track in which a runner attached to handle is disposed. The runner is connected to a set of weights via a cable and pulley arrangement. In use, the handle and associated assembly is moved down the track against the resistance of the weights. The shape of the track is arranged to simulate the action of a limb during a sporting movement, for example the movement of the user's arm when taking golf swing, so that the apparatus exercises the user's muscles in precisely the way that is required for maximum benefit for the sporting action which corresponds to the shape of the track.

Abstract: A continuous molded electronic component assembly process in which a continuous line of components are supplied on reels for assembly and insertion. The supply reels of electronic components are made by an injection molding process, reeled and supplied to assembly and insertion machines. The assembly and insertion machines provide the means for removing, assembling and inserting the electronic components. Examples of the process, but not limited to, are shunts, wire end terminals and pilot posts.

Abstract: A camera video signal processing circuit for processing camera video signal whereby displaying on a monitor or a television receiver in the monitoring system and the like, and particularly, to a picture holding circuit for a still picture in a television receiver in which when video signal is not inputted from video camera, final picture is held whereby enabling to display as a still picture. The circuit comprises a luminance/color difference and synchronous signal separator an analog switching unit, an analog/digital converter, an encoder, a controller, digital/analog converters, a synchronous signal generator, an encoder, a synchronous voltage detecting unit, an integrator, a flip-flop and gates.

Abstract: A stylus switch is activated automatically when the tip of the stylus is pressed against a digitizer tablet with sufficent force. The pressure switch inlcudes a transducer in the form of an ink layer having electrical resistance which varies as a function of the pressure applied thereon. Electrodes of conductive ink contact the ink layer of the transducer, providing a circuit element including a variable resistance. The current which flows between the two conductive ink electrodes varies as a function of the force with which the stylus tip is pressed against the data tablet, thus providing an analog output which can be detected as a function of pressure or which can be detected to determine when the pressing force exceeds a predetermined value. Processing of the data representing the coordinates of the stylus tip is enabled only when the tip is being pressed with at least a predetermined force, i.e. the amount of force applied by a stylus user during writing.