Abstract: A closure device covers the inlet portal of a swimming pool weir. The closure device has a main opening that is controlled by a weir flap and a secondary opening to accommodate flexible piping leading to a pool cleaner, whereby water can be drawn into the weir simultaneously both through the flexible piping and the main opening. The weir flap has an elongated slot just below the upper edge.

Abstract: A hydrodynamic bearing which includes a carrier and a plurality of bearing pads circumferentially spaced about the carrier. The pads may have a modular construction whereby pad portions are secured to support portions. The pads may also be releasably secured to the carrier. Various bearing pad constructions are contemplated. This includes constructions in which the secondary support portion includes a membrane and the primary support portion includes a cylindrical member extending between the membrane and the bearing pads, relatively rigid constructions in which the necessary deflections are achieved through pad shape and center post configurations and positioning, pads having a wear surface formed therein, and a continuous bearing pad ring may be substituted for the discrete bearing pads. The carrier may be provided with locator pins in the pad receiving bores to orient the pads properly.

Abstract: The following technical measure is taken to provide a bicycle speed change system or method wherein a speed change operation can be performed substantially without unhanding a handlebar and without erroneously shifting to a lower or higher speed.Specifically, the bicycle speed change system (1) comprises a front speed shifter (1a), a rear speed shifter (1b), and speed change operation assemblies respectively including cylindrical operation members (4a, 4b) rotatably supported around right and left grip portions (3a, 3b), respectively, of a handlebar (2); each of the shifters being operated by a control cable (T) which is pulled or released by rotating a corresponding one of the cylindrical operation members, wherein each of the cylindrical operation members (4a, 4b) is designed so that rotation thereof in a direction of moving its top surface rearward causes a corresponding one of the shifters (1a, 1b) to shift to a lower speed position.

Abstract: This invention relates to areca food additives, especially, to additives for areca quids and foods containing areca component, and their preparation methods. High alkaline lime always exists in conventional areca food additive. Many problems consequently result such as oral cancer and the polluting of the environment by the spitting of a bright red liquid. A series of eatable neutral calcium salts of organic acid and compounds containing at least one of the following functional groups selected from the group consisting of --NH2, .dbd.NH, .tbd.N, --NH--, --CONH--, --HCO--, --CO--, --COOR--, --S--, and their salts were invented to replace lime. The taste of astringent and harms caused by the polyphenolic compounds of areca quid could be completely improved. The disease of quid chewer would be decreased and the problem of environmental pollution would be improved.

Abstract: A document transport device for document scanners and classifiers such as bar code readers which is able to send a read document different directions depending on its classification is discussed. The transport device uses a pivotable surface to direct documents and is able to be used with high speed document reading machines and documents of varying size and width.

Abstract: A process for the preparation of carbofuran which is used as an insecticide. Carbofuran is the N-methylcarbamate of 7-benzofuranol. Carbofuran is prepared by reacting catechol with beta methallyl halide or the alcohol in the presence of a catalyst composite containing a heteropoly acid and reacting the 7-hydroxy 2, 3, dihydro-2, 2, dimethyl benzofuranol thus obtained with methyl isocyanate or with phosgene and methylamine to obtain carbofuran.

Abstract: There is disclosed a play kit of detachable plastic components capable of forming either a slide assembly or a teeter assembly. The kit includes an elongated plastic playboard as a basic playing element. The latter has a wavy configuration and is preferables constructed in two symmetrical members abutting one another and releasably locked to each other. When used as a slide, the playboard is removably connected, at one end, to an upper end of a plastic support formed with steps to act as a ladder. The latter and the playboard are held together by removable struts. When the basic element is used as a teeter board, the support is made to act as a base. A prop structure is then detachably connected to the said base and to the playboard to allow the latter to teeter as well as to rotate about a vertical axis.

Abstract: The present invention relates to a sewage disposal apparatus employing large buoyant filter media and is directed to prevent effectively clogging in these filter media. The intended object of the invention can be attained by circulating the filter media by a circulation arrangement to allow the filter bed as a whole to flow very calmly, and more efficiently by removing sludge deposited on the filter media utilizing the circulatory movement of the filter media.

Abstract: A rotary mechanical face seal for preventing leakage of a fluid, either liquid or gas, across two relatively rotating surfaces. The seal is of the non-contacting mechanical type in which a predetermined spacing is maintained between the relatively rotatable sealing washers by formation of a pressurized fluid film between the relatively rotating surfaces. The opposed faces are constructed to provide a separation of the faces at startup and thereby prevent damage or destruction to the faces before design pressures are achieved. This is achieved by providing at least one of the opposed faces with a deflection bearing portion which causes the necessary deflections under load. The bearing portion comprises a spaced series of lift pad sections. A variety of lift pad constructions can be used. The seal also includes a hydrodynamic radial bearing which centers the shaft in the static state to avoid shaft runout.

Abstract: An improvement in a check valve, especially a check valve intended to be mounted across a corresponding opening of a hydromassaging apparatus. The check valve comprises a casing having an inlet and an outlet, a conduit extending from said inlet to said outlet, structure for axially setting and fastening the check valve in a corresponding opening, and improved structure including a membrane and consisting of a flexible membrane made of elastomeric material and provided with an orifice, an element provided with a flap seat of sufficient size to completely cover the orifice, structure for connecting the element with the casing and positioning the seat in the vicinity of the outlet, and structure for fastening a periphery of the membrane across the outlet of the casing, to align the orifice with the seat and to position said orifice in such a way with respect to the seat that the elasticity of the membrane presses a portion thereof surrounding the orifice against the seat.

Abstract: A hydrodynamic bearing which includes a carrier and a plurality of bearing pads circumferentially spaced about the carrier. The carrier is formed with a series of circumferentially spaced groups of pad support openings. Each group of pad support openings includes two or more pad support openings each of which is capable of supporting a pad, but only one of which supports a pad at any one time. The carrier is designed such that the openings formed therein are supported as sets of supports such that each group of openings includes one opening of each set of openings. The carrier supports the openings such that the support of each opening within each set is substantially identical to that of the other openings in its set, but different than the support of the openings of other sets such that each set of bearing pad openings is adapted to support bearing pads for a distinct characteristic deflection.

Abstract: The following technical means is provided to achieve a chain shift operation with a minimum of the guide pulley travel distance, to improve speed change efficiency and operatability, and to prevent the speed change assembly from protruding sideward:At a forward location of a sprocket cluster (2), a link base (8) of a pantograph link mechanism (12) is supported by a chain stay (7), and from this, an inner link (9) and an outer link (10) are extended. To respective free end portions of these links, there is connected a movable member (11), which pivotally supports a chain guide (15) which is elastically urged. The guide pulley travel control means (18) functions in such a way that when the pantograph link mechanism (12) is deformed, it would cause a guide pulley (13) of the chain guide (15) to move inward axially of the hub shaft and at the same time forwardly downward substantially along a radial path of the sprocket cluster (2).

Abstract: A laser diode unit, having advantages of dissipating heat quickly, being capable of protecting itself from being destroyed by an incidental electrostatic or electric voltage, being effective to deal with the operations of aligning, positioning, adjusting, and being easy to be mass-produced. The laser diode unit includes a laser diode element for emitting laser light beam; a mold housing for securing the laser diode element thereon, laser light beams emitting from the laser diode element being capable of penetrating the mold housing; a collimating lens set disposed within the mold housing for collimating the light of the laser beam emitting from the laser diode element; and an adjusting means for driving the collimating lens set to move to and fro within a through bore formed in the mold housing.

Abstract: There is provided a bicycle rear derailleur wherein a problem that shifting the chain to a diametrically larger sprocket causes the guide pulley to come too close to the sprocket, which is an inherent problem to a conventional bicycle rear derailleur using a double tension mechanism, is rationally solved with further improved speed change efficiency. This rear derailleur comprises a rearwardly extending control mechanism (23) pivotally supported at a front end portion thereof to a bicycle frame (22) ahead of the multiple sprocket assembly, the control mechanism mounted at a rear end portion thereof with a chain guide (25) rotatably supporting a guide pulley (39) and a tension pulley (40), wherein the control mechanism is urged against the bicycle frame in a clockwise direction about a first lateral shaft (34), and the chain guide is urged against a chain guide mount of the control mechanism in a clockwise direction about a second lateral shaft (41).

Abstract: A yolk cup is provided for use in an egg breaking apparatus. The yolk cup is pivotable between a substantially horizontal position and an inclined position. In the horizontal position, the yolk cup receives an egg content including a yolk and an albumen, the yolk cup being provided with a discharge device for selectively discharging the albumen while retaining the yolk when the yolk cup is held in the horizontal position. The discharge device comprises a yolk discharge opening elongated horizontally for discharging the yolk when the yolk cup is pivoted to the inclined position.

Abstract: A friction pad for use in a friction engagement device such as a brake or clutch. The friction pad includes a friction lining, a sensor and an actuator. The sensor senses an operating condition such as pressure applied to the friction lining and emits a signal that is directly or indirectly sent to the actuator. The actuator changes shape in response to the signal and thereby causes a change in the structure of the friction pad.

Abstract: The invention relates to a cutting machine, circular saw machine or the like powered by an internal combustion engine. The machine comprises a cutting unit or corresponding unit having a rotational tool, and a power unit, which comprises an air-cooled motor cylinder in a motor room limited by a casing which at least partly consists of a cylinder cover; and an impeller rotatable about the crank shaft with impeller wings, which during rotation propels a cooling air flow outwards toward the periphery of a fan housing and further to the motor room under and inside the cylinder cover. At least a first filter chamber with a filter for intake air for the internal combustion engine is provided over the cylinder cover, and a nozzle tube for the intake air extends from an intake port close to the periphery of the impeller up through the motor room terminating in the at least first filter chamber over the cylinder cover.

Abstract: A building extension including a preformed shell/module in the shape of the desired extension and which is connectable to an external wall having an external surface which harmonizes or aesthetically contrasts with the existing design of the building. The external wall may be in the shape of a bay window and the shell/module may be located at least partially within the bay of the bay window.

Abstract: A vacuum suction lifter for holding and transferring objects with a temperature of more than 400.degree. C., in particular glass screens, is provided, the contact surface (4) of which is raised with respect to a central surface (6), and which is covered with a heat-resistant, sufficiently tight textile structure of poor thermal conductivity, preferably a glass fibre fabric, as the sealing element (16). The contact surface (4) matches the contour of the workpiece to be lifted.