Abstract: A venting and drain arrangement for a small watercraft that is formed with a tunnel in which the propulsion unit for the watercraft is formed. The venting arrangement includes a vent pipe that extends through a venting recess formed in the hull to the engine compartment. A well is formed in the venting recess in which water can accumulate and a drain conduit extends from the well to the tunnel for discharging water to the body of water in which the watercraft is operating without necessitating holes that will be visible when the watercraft is operating.

Abstract: An improved steering arrangement for a jet propelled watercraft including a rudder carried by the forward portion of the hull and which is out of the water at high speeds and submerged at low speeds for assisting in low speed steering without adding to high speed drag. The rudder and the steering nozzle of the jet propulsion unit are steered simultaneously.

Abstract: A number of embodiments of small watercraft hull configurations wherein water may be permitted to enter into a rider's foot area if desired. Water barrier devices are incorporated, however, that will preclude water entry under normal running conditions.

Abstract: A small watercraft of the jet propelled type having a pair of removable side containers adapted to be mounted on the sides of the hull so as to provide storage area and increased buoyancy.

Abstract: A hull configuration for a small watercraft that provides a tandem straddle type seating arrangement to the rear of a bridge on which the steering handle is formed. In addition, a forward seat is also provided and the hull is configured so that the buoyancy increases if a rider shifts to the forward seat so as to maintain a generally horizontal stability for the watercraft under all conditions.

Abstract: Electronic circuits (11,12) are mounted on a metal base (13). The metal base is covered by a mold resin case (16) at the peripheral portion thereof. A projected portion (29) is formed along all the peripheral edge portion of the metal base. A step portion is formed to the metal base next to the projected portion of the metal base. A groove (28) is formed along all the peripheral portion of the bottom surface of the mold resin case. The projected portion is engaged to the groove which is filled with a bonding material (33). The bottom surface of the step portion is also covered by the bonding material when the projected portion is thrust into the groove of the mold resin case.

Abstract: In a thermal-environment sensor which detects thermal conditions in an indoor environment based on the surface temperature of a heating element supplied with a thermal quantity, the spectral emissivity of the outer surface of said heating element closely conforming to the spectral emissivity of the surface of the human skin or clothes thereon so as to bring the radiant heat transfer coefficient of the sensor remarkably near that of the human body.

Abstract: A boat having an internal combustion engine with an exhaust pipe comprises a boat body having a bow and a stern, and a hollow section formed in the boat body. The hollow section is provided with at least one opening at the stern for communication between the hollow section and the atmosphere. The exhaust pipe is connected to the hollow section so that exhaust gas from the engine is exhausted to the atmosphere through the hollow section.

Abstract: A device for storing a weft yarn for inserting in a jet loom, which is provided with a weft yarn retaining surface, is movable relative to a feed nozzle, for receiving a weft yarn ejected from the feed nozzle. The device is characterized in that a blacking member is arranged in such a manner that one end of the member is engaged with the weft yarn retaining surface at a depositing zone adjacent to the feed nozzle so as to block the fluid from the nozzle as would otherwise disturb the yarn deposited on the retaining surface. A gap is formed between the weft yarn retaining surface and the cover, which gap increases as a position moves away from the depositing zone towards the side where the stored weft yarn is withdrawn.

Abstract: A component layout for a small boat that improves the balance by positioning all of the heavy components in close proximity to the center of the watercraft with the engine being positioned substantially at the watercraft center of gravity.

Abstract: A hull configuration for a watercraft that improves stability in straight ahead running without significantly increasing the resistance to forward movement. The hull is comprised of a generally flat center section that is surrounded on each longitudinal side by a pair of arcuate sections, the outer peripheries of which are defined by respective chines.

Abstract: In a thermal-environment sensor which detects thermal conditions in an indoor environment based on the surface temperature of a heating element supplied with a thermal quantity, the spectral emissivity of the outer surface of said heating element closely conforming to the spectral emissivity of the surface of the human skin or clothes thereon so as to bring the radiant heat transfer coefficient of the sensor remarkably near that of the human body.

Abstract: A stacked type piezo-electric element device in accordance with the present invention includes stacked type piezo-electric elements constructed by stacking a plurality of piezo-electric elements with electrodes on both sides, a plurality of voltage impression circuits prepared corresponding to respective piezo-electric elements for supplying a voltage to each electrode of the piezo-electric elements, a power source which connects the voltage impression circuits in parallel, and circuit breaker elements which, when the current that flows in at least one of the voltage impression circuits exceeds a predetermined value, interrupt the current flowing in the voltage impression circuit that exceeds the predetermined value.

Abstract: A method of programming for a programmable circuit in a redundancy circuit system including a RAM having normal and spare memory cell rows constructed on a common chip and the programmable circuit, is disclosed. The programmable circuit has a plurality of fuses and can produce a signal for disabling all the normal memory cell rows while enabling a spare memory cell row corresponding to a combination of blown-out fuses and non-blown-out ones among the plurality of fuses with respect to a certain normal memory cell row address. The method comprises the steps of detecting a faulty memory cell row, storing the address thereof and supplying a fuse-blowing current one after another of those of the programmable circuit fuses which correspond to a certain logic level bits of the stored address.

Abstract: A weighing apparatus of the type which weighs articles through use of a load cell having strain gauges attached thereto, the apparatus including a sealed vessel filled with a liquid of a specific gravity greater than unity for housing the load cell which is immersed in the liquid, a diaphragm provided on the sealed vessel so as to close an opening formed in a portion of the vessel, a supporting member for supporting a container carrying the articles to be weighed, and a connecting member for mechanically connecting the supporting member with a load-receiving portion of the load cell through the intermediary of the diaphragm.

Abstract: An apparatus for regulating tension in warps of a weaving machine comprising: a tension lever swingably supported on a weaving machine and having a roller supported thereon for regulating the tension in warps delivered from a warp beam; a weight lever swingably supported on the weaving machine and having a load at one end thereof; and a link operatively connecting the tension lever and the weight lever. The tension lever has an elongated hole formed thereon, and the lever ratio of the tension lever is changed by moving the link along the elongated hole.

Abstract: A gas-insulated switch has separable contacts disposed within a chamber-forming cylinder. The arc drawn between the contacts on opening provides pressurizing of the arc-extinguishing fluid in the chamber, while additional pressurization is provided by an interlocking member which has an interlocked movement with the contacts during the opening operation.

Abstract: A boat having an internal combustion engine with an exhaust pipe comprises a boat body having a bow and a stern, and a hollow section formed in the boat body. The hollow section is provided with at least one opening at the stern for communication between the hollow section and the atmosphere. The exhaust pipe is connected to the hollow section so that exhaust gas from the engine is exhausted to the atmosphere through the hollow section.