Abstract: The present invention is a racquetball racquet that is substantially longer than a conventional 21 inch racquet, but which has a maneuverability comparable to existing racquets, and on overall playability exceeding conventional 21 inch racquetball racquets. More particularly, a racquetball racquet comprises a frame having a head portion, a handle connected to the head portion, and stringing. The head portion is a thin-wall, hollow composite tubular member having a minimum weight per unit length, and has a cross-sectional height between 15 and 28 mm, a cross-sectional width between 9 and 13 mm, and defines an egg shape strung surface having a length of at least 14 inches, and preferably between 14 and 15.5 inches, and a strung surface area greater than 95 square inches, and preferably between 100 and 125 square inches. The racquet has an overall length that is substantially greater than 21.

Abstract: Methods for operating and administering mobile station user groups in a wireless communications system. In one embodiment, a user group identification code is assigned to a plurality of mobile stations to form a user group, wherein the number of mobile stations in the user group is less than the total number of mobile stations in the entire communications system, and wherein the user group identification code is distinguishable from a unique mobile station identification code associated with each mobile station in the user group. A page message from the system to the user group is transmitted using the user group identification code when a terminating call to the user group is requested. A user group specific page indication is then generated at the mobile stations indicating to a user of each mobile station that the page message has been received. A page response message is then transmitted to the system from mobile stations whose users acknowledge the page indication.

Abstract: A recording and/or reproducing apparatus includes a rack mechanism by which a cassette compartment can be easily removed from a mechanical deck regardless of any position at which reel tables are moved. In a recording and/or reproducing apparatus such as a video cassette recorder in which a space between two reel tables can be moved by a reel table movement mechanism and small and large tape cassettes of different size are selectively mounted on the reel tables, a rack mechanism has a pair of parallel racks which can be relatively moved through a pinion, one rack has an engagement recess formed on one end portion thereof, the other rack has an engagement recess formed on one end portion thereof, the engagement recess being positioned over the one rack and a cassette compartment includes a drive lever which is moved in the height direction in response to the insertion of tape cassettes of different size.

Abstract: A method for the treatment of cancer in mammals. A subject afflicted with cancer receives by oral administration a pH modified citrus pectin which inhibits metastasis of primary tumors.

Abstract: Monocular and stereoscopic color display systems, wherein passive cholesteric liquid crystal (LC) filter/mirrors and active variable retarder type LC arrays are used in combination to produce low cost, high resolution, multicolor and full color displays, suitable for use as advertising, automotive, aircraft, computer, games and electron instrumentation displays.

Abstract: Recombinant DNA polymerases from archaebacteria as well as isolated DNA coding for such polymerases are provided. The isolated DNA is obtained by use or DNA or antibody probes prepared from the DNA encoding T. litoralis DNA polymerase and the T. litoralis DNA polymerase respectively. Also provided are methods for producing recombinant archaebacteria thermostable DNA polymerase and methods for enhancing the expression of such polymerases by identifying, locating and removing introns from within the DNA coding for such DNA polymerases.

Abstract: An output driver circuit comprises a plurality of parallel pull up and pull down circuits each comprising at least one transistor switch switchable between on and off states and circuitry operable to maintain a desired resistance in the circuit when the transistor switch is switched on, and switch actuating circuitry including time delay circuitry for effecting a sequence of transistor switching operations in said pull-up and pull-down circuits with a time delay between successive operations, each operation effecting simultaneous switching of a transistor in one pull-up circuit and one pull-down circuit, whereby the output impedance is stabilised during a change in signal on the output terminal.

Abstract: A method includes dividing a yarn into various sections with reference to the pieced yarn section, with each section being characteristic of the piecing process. A yarn profile in each section is measured and evaluated against criteria specific to each section, whereby a yarn defect and its position on the yarn are determined and from which the cause for the defect is determined. The pieced yarn section is also divided into three subsections and each subsection is measured and evaluated against certain subsection criteria for the detection of fluff, trash accumulation and fiber sloughing.

Abstract: A keyboard apparatus having keys and mass members that are relatively light in weight and low in cost and yet provide a good key touch feeling that is comparable to the key touch feeling of a keyboard apparatus of an acoustic grand piano. A keyboard apparatus for an electronic musical instrument includes a support member including a first fulcrum section and a second fulcrum section. A key is movably supported about the first fulcrum section of the support member, and a mass member is movably supported on the support member and coupled to the key. The mass member has a mass concentration section made of an elongated metal bar and a resin section connected to the mass concentration section. The resin section has a pivotal fulcrum receiving section to be pivotally supported about the second fulcrum of the support member.

Abstract: A surgical cutting tool, such as a pair of scissors, is provided suction means which allows suction to be applied to the site of operation. In the case of scissors, the closure of the blades is used to reduce the opening of a recess formed alone one of the inboard edges of the blades, and to effectively move the opening through which suction is applied, along the blade so as to constantly juxtapose the point of cutting. Electrodes can be connected to the blades to permit the tool to also act as a cautery.

Abstract: A heat exchanger has an inner pipe inside of which a product travels, the inner pipe having a perforated lateral wall, an outer pipe surrounding the inner pipe and formed as a jacket, a plurality of flanges extending between the inner pipe and the outer pipe to form a plurality of segments, a plurality of supply passages each communicating with a segment of first group of segments for supplying a cooling liquid into a space between the outer pipe and the inner pipe, a plurality of discharge passage each communicating with one segment of a second group of the segments for discharging the cooling liquid from a space between the outer pipe and the inner pipe, each of the segments of the first group with which one of the supply passages is connected being located between two segments of the second group with which the discharge passages are connected.

Abstract: A portable exercise apparatus includes a support frame having a base mountable under a chair to hold the base in a stationary position with a user seated on the chair and an upright standard mounted upon the base, a shaft mounted to an upper end of the upright standard and having opposite ends extending from opposite sides thereof, a pair of arms disposed on opposite sides of the upright standard with each arm at one end mounted to one end of the shaft for rotatably mounting the arm to the upright standard, a pair of pedals each mounted to the other end of each of the arms for engagement by a user to create the force necessary to rotate the arms relative to the upright standard, and a resistance generating and adjusting mechanism disposed on the ends of the shaft at the opposite sides of the upright standard and engaged with the one ends of the arms and being operable to generate and selectively adjust a level of resistance to rotation of the pair of arms relative to the upright standard in response to rotati

Abstract: An apparatus for electromagnetically and rotationally vibrating a rotary body that is supported by bearings. The apparatus comprises a ring-shaped magnet bipolarly magnetized and mounted coaxially on a shaft of the rotary body, a ring-shaped stator having a coil and adapted to generate a rotating magnetic field by controlling an electric current supplied to the coil, and a frequency variable vibration power source adapted to supply alternating electric power to the coil in the stator. The distance between a location of a magnetic pole in the stator and an axis of the shaft is different than the distance between a location of a magnetic pole in the magnet and the axis of the shaft. The magnet and the stator are disposed so as to be adjacent to each other. Thus a rotational exciting force is applied to the rotary body by an interaction of the rotating magnet field generated by the stator with the magnet.

Abstract: An improved grip exerciser has a grip frame having a pair of handles and a receiving head disposed at the intersection of the two handles, and a gear-like adjusting member housed in the receiving head. The receiving head has a central hole and an axial split at the bottommost area and two axially extended protrusions each having a triangular cross section and disposed adjacent the split symmetrically. Each protrusion has a retaining cavity on its inner face respectively. Each dentiform rib of the adjusting member has a pair of retaining projections at the middle thereof. The receiving head has an upper area above the two symmetrical triangular protrusions which has a larger diameter than that of a lower area defined between the protrusions so as to permit the adjusting member to shift slightly when the grip exerciser is subject to force. The adjusting member has a through hole having multilateral curved sides. The pitch between two dentations of the gear-like adjusting member is a constant.

Abstract: A multiplying digital-to-analog converter produces first and second output currents that have a magnitude difference equal to a gain value multiplied by a magnitude difference between first and second input currents. The multiplying digital-to-analog converter has first and second input nodes for carrying the first and second input currents and first and second output nodes for carrying the first and second output currents. A first input transistor has a first terminal coupled to the first input node, a second terminal with voltage that increases with increases in the first input current, and a third terminal for carrying a first input bias current. A second input transistor has a first terminal coupled to the second input node, a second terminal with a voltage that increases with increases in the second input current, and a third terminal for carrying a second input bias current.

Abstract: A resettable well stimulation tool is lowerable into a well bore on a length of tubing through which pressurized fluid may be forced into the tool to inflate a packer portion carried by the tool and then discharge a stimulation fluid into a portion of the well bore sealed off by the packer portion. During the inflation cycle of the tool pressurized fluid is forced downwardly into an annular tool body inflation chamber that communicates with an inflatable packer carried by the tool body. A perforated tube member coaxially carried in the inflation chamber serves to vertically distribute the inflation pressure along the length of the packer and assure its even inflation. In a straddle packer embodiment of the tool inflation and stimulation passages extend internally through the tool and are sealingly separated by an internal crossover structure, with the inflation passage being in communication with upper and lower packer members.

Abstract: A wireless remote temperature sensing and control thermostat system for regulating air ducted air conditioning systems incorporating a normal mode and a remote control mode, including a combination thermostat and radio-frequency receiver unit, a radio-frequency transmitter, and an adjustable register. In the normal mode, a reference temperature is set by the thermostat for the temperature throughout the entire air conditioned structure. In the remote control mode, the local temperature sensing and control functions of the thermostat are disabled and the transmitter unit will take over the temperature sensing at the remote site which, in turn, then will control the thermostat unit. As a result, the users will be able to more accurately control their own personal environment.

Abstract: A device for attenuating noises generated by moving sources includes a set of arranged electroacoustic sources which emit an opposite antinoise wave in response to an incident wave as sensed and processed. The electroacoustic sources are arranged to preferably emit a synchronous antinoise wave having a radius of curvature approximating that of the incident wave.

Abstract: In the semiconductor of the present invention, the first pair of pad lines consisting of a plurality of pads are arranged on the bottom portion of the recess portion of the enclosure, the recess portion being made at the center portion of the enclosure by the counterboring process to have a predetermined depth. At approximately center of the recess portion, a suction opening is made so as to suck the potting material from outside. In the recess portion of the enclosure, the semiconductor chip is supported. The semiconductor chip has the second pair of pad lines arranged to oppose to the first pair of pad lines and electrically connected to the first pair of pad lines respectively. The potting material is poured into the recess portion so as to completely cover the semiconductor chip. At the same time, the potting material is sucked from the suction opening.

Abstract: This invention provides a projector capable of effectively utilizing the light from the light source and significantly reducing the light illuminating the outside of the area to be illuminated, thereby attaining an excellent efficiency of light utilization. In the illuminating system of the present invention provided with a light source and a reflector, there is further provided a circular reflector of a spherical surface, for returning the light, which emerges from the light source to the outside of the area to be illuminated, without being reflected on the reflector, to the light source. Also there is provided a flat mirror or a substantially spherical sub reflector for returning the light, which proceeds to the outside of the area to be illuminated, after being reflected on the reflector, to the light source. The sub reflector may be provided in the vicinity of the light source.