摘要:
A watercraft propelled by a jet propulsion unit that is positioned within a tunnel in the underside of the watercraft. The jet propulsion unit is supported for pivotal movement about a horizontally extending transverse pivot access and the housing of the jet propulsion unit is divided into separate components so that the water inlet portion may be rotated to an upwardly facing service position without rotation of the discharge nozzle, steering nozzle, or reverse thrust buckets associated therewith. As a result, an extremely rigid support is accomplished which nevertheless permits ease of servicing.
摘要:
Apparatus for assisting in boarding or alighting a watercraft having a hull and a deck is disclosed and includes a ladder which is movable between a stowed position, in which it overlies a portion of the deck, and a deployed position in which it extends from the watercraft forwardly and downwardly of the deck to a landing area in order to assist in boarding or alighting the watercraft. The ladder is attached to the watercraft at a forward location thereof. In one embodiment, the ladder is pivotably mounted by means of a pair of spaced brackets to the deck of the watercraft. In another embodiment, the ladder is slidable within a pair of spaced mounting brackets and is adapted to engage a clip, attached to each mounting bracket, to enable the ladder to pivot to its deployed position. In a third embodiment, the ladder includes a pair of hinged sections with one of the sections being pivotably mounted to the deck at a forward location of the watercraft so that the second pivot can be located forward of the bow of the watercraft to enable the second section of the ladder to extend to the landing area when the ladder is in its deployed position. For use with each of the above described embodiments, the deck of the watercraft includes a recessed area in which the ladder lies when it is in its stowed position. In addition, various projections, which are longitudinally spaced with respect to the watercraft, are provided in the recessed area and are disposed between cross-pieces of the ladder when in its stowed position so as to locate the ladder and provide a stepping area for the occupants of the watercraft.
摘要:
A thermal environment sensor has a single temperature detector for detecting temperature and producing an output representative of the detected temperature, the temperature detector having, when heated by a predetermined constant power, a convective heat transfer coefficient giving it a wind velocity dependent temperature drop characteristic in close conformity with the wind velocity dependence of the effective temperature drop felt by a human body. A heater is provided for heating the temperature detector, and an electric power supply is connected to the heater for supplying the heater with a constant electric power corresponding to the predetermined constant power, and a temperature estimating circuit is connected to the temperature detector for correcting the output of the temperature detector by a predetermined constant temperature difference for thereby obtaining the effective temperature felt by a human body. Furthermore, a wind velocity estimating circuit is also connect to the temperature detector so that when the temperature detector is alternatingly supplied with a first and a second level of electric power, the absolute value of the wind velocity may be estimated from the heat transfer coefficient of the temperature detector obtained using the temperature of the temperature detector at the first and second levels of power and the respective first and second levels of power.
摘要:
A small boat embodying an improved hatch cover construction. The hatch cover is made from a thin lightweight material but is reinforced by a sub-frame and this reinforcing sub-frame rotatably journals the steering column.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
An electric shaver 1 includes: outer blades 8 having blade holes 50 defined by bars; and inner blades 13 which is provided inside of the outer blades 8 and moved relative to the outer blades 8 to cut body hair 71 inserted into the blade holes 50. A first bar 43 in which a skin contact surface 43a coming into contact with skin 70 is positioned on the inner blade 13 side of a skin contact surface 45j of a hair raising bar 45 is provided adjacent to and forward of the hair raising bar 45.
摘要:
A base station includes a first receiver that receives a signal from the base station, the signal indicating a first wireless quality that is a wireless quality of signals received by a mobile station which uses software-defined radio and communicates with the base station using a first communication protocol, and a processor that executes processing to download communication software that causes the mobile station to execute communication processing according to a second communication protocol based on a first condition of the first wireless quality, and executes processing to transmit a handover instruction signal to cause a handover of the mobile station to a second base station that communicates with the mobile station using the second communication protocol based on a second condition of the first wireless quality, wherein the first condition is a condition set to be satisfied before the second condition when the first wireless quality decreases.