Abstract: An apparatus for continuously measuring temperatures of molten metal including a thermocouple unit (A) and an immersion protection tube unit (B), wherein the thermocouple unit (A) comprises a thermocouple (1) having an end equipped with a temperature sensing element (8) and an opposite end connected to terminals (2), an insulator (9) of substantially one piece containing the thermocouple (1), a porcelain protection tube (6) of high airtightness containing the insulator (9), and a terminal box (3) having an extension sleeve (5) with which the upper part of the porcelain protection tube (6) is held and having a housing (20) which contains the terminals (2). The immersion protection tube unit (B) comprises an alumina-graphite protection tube (21), a holding sleeve (22) with a flange which is connected to the upper part of the alumina-graphite protection tube (21), and a connecting sleeve (26) connected with the holding sleeve (22).

Abstract: The present invention provides a throttle operating device for jet-propelled small-sized boats comprising an attaching bracket integrally fixed to the steering handle lever of a boat body, and a throttle operating lever pivotally connected to the bracket through a pivot pin so that it can be raised and lowered, characterized in that:the attaching bracket for the throttle operating lever is bisected into a pair of bracket segments which can be clamp-wise fixed to the handle bar, thereby making it possible to replace the operating lever and mount a new one on the handle bar easily without having to extract the grip cover from the handle bar,the operating lever is in the shape of the Japanese character " " as seen in side view with its hand rest and attaching leg forming an acute angle, which is less than 90 degrees, the attaching leg being connected through a pivot pin to a lever support fork extending rearward from an intermediate height location on the attaching bracket, thereby reducing the radius of rotatio

Abstract: The present invention relates to a steering handle device for jet-propelled small-sized boats of the type in which: structurally, the stern of the boat is adapted for use as a floor deck on which the rider stands, with an engine mounted on the front portion of the floor deck; a handle post is pivotally connected at its front or lower end to the bow of the boat by a horizontal shaft so that it is swingable; a base board for attaching the handle bar is integrated with the rear or upper end of the handle post overhanging the floor deck, and an attaching plate for the handle bar is pivotally connected to the base board by a vertical shaft; the rider holding the handle bar steers the boat to freely slide over water surface while changing the position at which the foot pressure is applied to the boat; the steering handle device being characterized in that: the handle bar is constructed in a substantially H-shape in a front view consisting of a handle bar body horizontally extending transversely of the boat, and a p

Abstract: The present invention relates to a steering handle device for small jet-propelled boats in which the stern of the boat is used as a floor deck on which the rider stands, and the engine is mounted on the front of the floor deck. A handle post is pivotally connected to the bow of the boat by a horizontal shaft. A base board for attaching the handle bar is integrated with the rear or upper end of the handle post overhanging the floor deck, and an attaching plate for the handle bar is pivotally connected to the base board by a vertical shaft. The rider steers using the handle bar and by changing the position at which he/she applies foot pressure to the boat. The steering handle device is characterized by the handle bar being constructed substantially in a H-shape as seen from a front view. The handle bar assembly consists of a handle bar body horizontally extending transversely of the boat, and a pair of grips vertically extending from the opposite ends of the handle bar body.

Abstract: The invention relates to a steering handle device for jet-propelled small-sized boats on the type in which the operator rides the boat in a standing posture. The invention prevents the operator's body from being twisted around during the turning of the boat to the extent that he is forced to assume an unstable steering posture, and makes it possible to apply the foot pressure resulting from the operator's body weight to the boat body effectively and as desired from the standpoint of human engineering so as to provide the so-called quick steering performance.

Abstract: A handle device for a jet-propelled small-sized boat wherein a handle post is pivotally connected to the stem of the boat so that it can be tilted around the axis of a transverse shaft and a handle bar is fixed to the upper end of said post by an attaching bracket, the handle device being characterized in that: the attaching bracket is made in two parts, a front bracket and a rear bracket, the front bracket being attached to the handle post and the rear bracket to the handle bar, the position at which the rear bracket is connected to the front bracket being adjustable by sliding the rear bracket longitudinally of the boat. Thus, it is made possible to readily cope with the rider's physical build and steering technique which vary from rider to rider, and to change the position of the step-on pressure applied to the boat.

Abstract: A kit for post-installing reed valves between the cylinder block of a 2-cycle engine of a jet propelled small-sized boat and an inlet manifold is characterized in that the kit comprises base plate, a carburetor plate and a reed valve case interposed between two plates. The base plate is formed with two types of holes, i.e., plain holes through which attaching bolts are screwed into threaded holes in a cylinder block and threaded holes to be used in attaching the reed valve case. The carburetor plate and reed valve case are formed with plain holes, respectively, for alignment communication with the threaded holes in the base plate to receive other bolts. The arrangement is such that the reed valves removably fitted in the reed valve case are inseparably held between the reed valve case and the carburetor plate. Thus, the 2-cycle engine can be efficiently changed from the piston valve type to the reed valve type.

Abstract: A method of producing propeller shafts for jet-propelled small-sized boats comprises the steps of preparing a main shaft in the form of a hollow round bar, which is a finished part and a pair of auxiliary shafts shorter in length than the main shaft, in the form of solid round bars, which are roughly shaped parts, connecting and integrating the pair of auxiliary shafts with the opposite cut ends of the main shaft by the friction welding process utilizing heat of friction produced by relative pressurized rubbing movement between the parts, and, with the main shaft, which is a finished part, used as a standard, machining the surfaces of the auxiliary shafts, which are roughly shaped parts, to form mount surfaces for fitting thereon such parts as oils seals, bearings, and a propeller.

Abstract: An engine rotational position detector and distributor assembly has a crank-driven rotary member mounted on an end portion of a cam shaft extending outwardly from engine block. The end face of the rotary member is formed therein with an annular recess and has a reference position information projection on the radially inner peripheral wall of the recess and a plurality of angular position information projections on the radially outer peripheral wall of the recess. The rotary member is covered with a detector housing mounted on the engine block and having an outer end wall supporting sensors faced to the circular paths of circumferential movements of the projections on the rotary member. The detector housing end wall has central opening with a bearing mounted therein to receive the outer end portion of the cam shaft and position the detector housing relative to the cam shaft whereby the sensors are precisely positioned relative to the circular paths of the movements of the projections.

Abstract: A plurality of permanent magnets are usually disposed within a cathode ray tube for correcting the magnetic field causing misconvergence or raster distortion of beams travelling within a cathode ray tube. Since the magnets of plate shape are magnetized in the thickness direction thereof being reversed at both the ends thereof along the longitudinal direction thereof, it is possible to effectively distribute magnetic field generated by the permanent magnets within the cathode ray tube without increasing the thickness of the magnets.

Abstract: A circuit is disclosed which is applied for a digital audio disk (DAD) system for detecting a maximum inverting period of a digital audio signal optically read out from the DAD. The audio signal is prestored in the DAD so as to have the maximum and minimum inverting periods specially set by an eight to fourteen modulation (EFM). The detection circuit includes an edge detector for detecting pulse edges of the digital audio signal, a counter for counting pulse edge intervals on the basis of a modulating clock signal, a counter type register, and a comparator. When the register contents of the counter type register is smaller than the count value of the counter, the comparator produces a pulse signal by which said register updates the contents of the register by "1". Repeating this operation, a maximum inverting period value of the digital audio signal is obtained in a fixed period of time.

Abstract: An anti-corrosive covering sheet for wrapping around a metal pipe such as a steel pipe comprising a heat-shrinkable plastic sheet, an adhesive layer and an anti-corrosive layer laminated in order, in whichthe adhesive layer comprises a hot-melt adhesive material having a melting temperature of not lower than 50.degree. C. and containing 30-80% by weight of an adhesive olefin copolymer; andthe anti-corrosive layer contains an anti-corrosive agent and has a thickness in the range of 1-10 micron.

Abstract: A phase locked loop control circuit for a digital audio disk system is disclosed which has a voltage-controlled oscillator (VCO), a reference signal generator for generating a reference signal corresponding to the phase state of a digital audio signal when the digital audio signal is reproduced or read out and which is recorded on a digital audio disk (DAD) to have a maximum or minimum inverting period value predetermined by the eight to fourteen modulation method, a phase comparator connected to the output terminal of the reference signal generator and the VCO, a detector for detecting the maximum inverting period value included in the digital audio signal; and an adder for adding outputs from the phase comparator and the detector and for supplying a sum result as an oscillation control signal to the VCO.

Abstract: A lash adjuster oil-supplying device has an oil path formed within the hollow center of a camshaft of an overhead camshaft-type engine. An oil jet hole is formed in said camshaft which communicates with said oil path. A first oil passage extends from a cylinder head through the camshaft housing to the camshaft, and a second passage extends from the camshaft through the camshaft housing to a passage for supplying oil to lash adjusters, which is formed in the cylinder head. Oil enters the oil path within the camshaft from the first oil passage, and, after passing through the oil path, is supplied to the passage for supplying oil to lash adjusters through the second passage. A portion of the oil passing through the oil path is ejected through the oil jet hole to lower and regulate the oil pressure supplied to the lash adjuster, independent of engine speed. This prevents pump-up of the lash adjuster without using a special oil-pressure regulator.

Abstract: Disclosed is an air cleaner for use in an internal combustion engine. The air cleaner has an air filter element and a secondary air filter element therein. Secondary air is fed into the exhaust system of the engine from the air cleaner via the secondary air filter element and a reed valve for promoting the oxidation of unburned HC and CO components in the exhaust gas. A partition is disposed on the circumferential wall of the casing of the air cleaner and is arranged so as to extend along approximately half of the circumferential wall. A secondary air passage is formed between the partition and the circumferential wall. The secondary air filter element and the secondary air inlet are disposed in one end of the secondary air passage. The other end of the secondary air passage opens into the atmosphere. A plurality of holes are formed on the partition and are equiangularly arranged along the circumferential wall.

Abstract: In a self-timer starting its operation by releasing blocking of an anchor or intermediate gear blocking member, a self-timer featured in that there are provided a blocking lever which is able to move said anchor or intermediate gear to blocking position and a locking lever capable of locking said blocking lever in a releasing position, said locking lever being pushed by the intermediate gear shaft removable along a guide groove to set free the engagement of a gear train, and the blocking of the anchor or intermediate gear being so arranged as to be made by releasing locking of the blocking lever, thus enabling a driving shaft to be reset at any desired position during operation of said self-timer.

Abstract: A single-lens reflex camera shutter having an operating ring driven in one direction by a gear-rack and pinion combination. The operating ring actuates the diaphragm and shutter blades and is stopped by a stop lever during the taking of an exposure. The stop lever is locked during the taking of an exposure by a signal lever that signals the taking of an exposure and is released upon completion of an exposure to allow the operating ring to continue in its travel and carry out opening of the shutter and opening of the diaphragm blades.

Abstract: A lens shutter for a quick-return single-lens reflex camera in which the diaphragm blades and shutter blades are operated by an operating ring driven rotationally in opposite directions by a driving device. The driving device has a pair of axially biased rods that coact to sequence their travel axially in two directions for driving the operating ring through gear racks on one of the rods and a driving ring coupled to the operating ring. A pinion meshes with both gear racks. A stop lever releasably locked by a signal lever stops the operating ring temporarily during taking of an exposure and the signal lever releases the stop lever at the end of an exposure which it signals or indicates. A cocking mechanism comprising a plurality of levers cocks the operating rods to cock the shutter.

Abstract: An electric shutter is opened and closed to effect an exposure in dependence upon the energization of an electromagnet. A switching circuit controls the energization of the electromagnet in accordance with various exposure information, such as diaphragm setting and film sensitivity. An exposure control circuit comprised of a series connection of a diode and a variable resistor is connected in parallel with the electromagnet and adjustably controls the time at which the electromagnet is deenergized to accordingly effect closing of the shutter such that the electromagnet delay time equals the shutter sector advancing time to thereby compensate for fluctuations between the two times.

Abstract: An exposure time control circuit for an electric shutter of a camera includes a monolithic IC having input circuitry in the form of a transistorized differential amplifier having two input terminals. A time-constant circuit develops a timing signal proportional to the brightness of the object field and applies it to one input terminal and a reference voltage signal is applied to the other input terminal to control the exposure timing. In order to enable varying the reference voltage through a wide range so that the input terminals can also be used for introducing other exposure information variables, such as input signals representative of the F-value, film sensitivity, etc., a transistor is connected between the IC and the source of electric power.