Abstract: Disclosed is a carburetor chamber arranged such that its casing having an opening at the top is fixed and this casing is provided, at its interior, with a carburetor and, at its bottom wall, with a path of feeding under pressure chain lubricating oil and, at its rear wall, with a through hole for permitting the passage therethrough of a throttle valve operation lever for the carburetor and, at its front wall, with an attachment section for a gas pipe and, at its opening, with an air filter, whereby the communication of an air-fuel mixture outlet of the carburetor with a suction port of an engine cylinder is effected through the gas pipe so that a connecting of the gas pipe with the suction port of the cylinder may be effected slidably and in a hermetically sealed condition.

Abstract: A cooling fan for a recoil starter type engine including a columnar projection formed at a front face of a magneto rotor of an ignition system mounted at a rotary shaft of an internal combustion engine, and a cylindrical portion for receiving the columnar projection and engaging an outer peripheral surface of the projection formed at a cooling impeller mounted at a front face of the magneto rotor. A keep plate forces a central portion of the cooling impeller against the magneto rotor, and the cylindrical portion of the cooling impeller is forced against the magneto rotor through a claw member engaging a recoil starter whereby the cooling impeller can be secured to the magneto rotor.

Abstract: A method and a device for determining explosivity rate of a gaseous medium with a detecting filament which is heated in said medium by an electric current flowing therethrough. Said detecting filament is ignited through connection to a power supply and power supplied to said filament is regulated so as to maintain constant the resistance thereof. At some successive moments value of a quantity U significant for power supplied to said filament is taken into account. An exponential curve is extrapolated from such values; parameters thereof are identified and introduced in a process function adapted to deduce therefrom an estimation of the initial explosivity rate of said gaseous medium independently of the nature of the explosive gas(es) present therein.

Abstract: A method of controlling one stand of a mill for rolling strip material, the mill having upper and lower back-up rolls and a pair of work rolls disposed between the back-up rolls, first and second screw means for respectively controlling movement of the ends of one of the back-up rolls and first and second jack means for respectively applying forces to each of the ends of the work rolls and a shape sensor having outputs from which the stress distribution across the width of the rolled strip is determined, comprising analyzing the effect upon the shape of the strip of the operation of the screw means and the jack means and deriving mathematical expressions, each including a control parameter, respectively representative of such operations determining the difference between said stress distribution and a desired stress distribution and obtaining a correction of stress distribution characterized by separately analyzing the effect upon the shape of the strip of the operation of each screw means and each jack means

Abstract: A structural support comprises inner and outer elements which are telescopingly engaged, a cage secured to the inner element and having apertures in which balls are disposed which are disposed radially between the two elements, and a frangible connection securing the two elements against relative axial movement. In the locked relative positions of the elements, the outer element has locally an increased internal diameter portion and the balls are radially disposed in this position or are moved into the portion on being subjected to an axial force which breaks the frangible connection, so that the relative axial movement of the elements results in the ball plastically deforming the outer element and absorbing energy from the force to protect the body carried by the support. The support can be used to provide a brace operating as a strut and/or a tie, or a shock absorber, or, by mounting a damping piston slidably in the inner tubular element can provide a shock absorbing piston and cylinder unit.

Abstract: A connecting rod for a radial piston motor including a spherical surface portion, a rod portion and a pad portion having a sliding surface. The spherical surface portion, rod portion and pad portion are formed integrally, and the sliding surface has a bearing alloy attached to its surface by centrifugal casting. An overlay may be provided on the bearing alloy. The connecting rod is produced in a mass production basis by a method including the steps of integrally forming a star-shape cylindrical monolithic blank (18) having a single cylindrical centrally located axial opening and bearing six equally spaced outwardly radiating rod portions (2), each rod portion bearing an integral, substantially spherical surface portion (1) on its distal end; attaching a bearing alloy by centrifugal casting, to the centrally located axial opening in said blank (18); machining the surface of the bearing alloy; and dividing the blank into six pieces constituting six connecting rods.

Abstract: A tank cap for closing the filling port of a fuel or lubricating oil tank of a power-driven portable machine such as a chain saw. The tank cap is made of a transparent plastic material and is provided with a protrusion protruding outwardly from the main surface of the tank cap. The cavity formed in the protrusion is communicated with the tank filling port so that the fuel or lubricating oil is allowed to come into this cavity. Consequently, the fuel or lubricating oil level can be visually checked from all directions around the tank cap.

Abstract: An inclination signaling device with respect to the horizontal, namely associated with a racquet for a tennis game, comprising an enclosure having at least two juxtaposed planes forming a dihedral on which a ball contained in said enclosure can move, the first plane of the dihedral being arranged along the axis of the handle and perpendicularly to the plane of the stringed surface of the racquet, the second plane of the dihedral forming a maximum angle of 90.degree. with said axis and said first plane, and comprising an electrical contact at its end opposite the line of junction of the first and of the second plane, said electrical contact being connected to a signaling device, whereby said ball is projected onto said electrical contact under the effect of the centrifugal force in the course of play by rolling over said second plane of the dihedral and provides a signal if the axis of the racquet is dipped downwards.

Abstract: The present invention relates to fishing reels of the type having a crank-operated rotor supporting a bail pivotable thereon between a position for winding up the fishing line on the line spool and an open position for permitting the fishing line to run out from the spool which is now rotating during casting, the bail being pivotable manually by finger operation of an operating arm pivotably supported on the rotor and connected to the bail for pivoting the latter from its line winding position into the open position thereof for casting.

Abstract: The invention relates to the geometry of drill bits for jet assisted rotary drilling. According to the invention there is used a drill bit comprising platelets of small radial dimension disposed about a central burster in a discontinuous peripheral crown axially extending said drill bit, channels for supplying pressurized fluid opening from the crown close to the platelets. Said platelets are preferably separated from one another by rectilinear discharge ramps. A drill bit in accordance with this invention can be manufactured e.g. by turning or milling. It can be applied for drilling rock formations in mines, and other hard materials.

Abstract: A bar or rod or tube clamp-type connector for assembling a frame to be covered by a woven fabric or tarpaulin or plastic film or sheet wherein the clamp-type connector comprises at least two rigid metal elements and one pierced resilient or cushioning element and wherein each rigid element includes a recessed portion having a limited inner friction surface which is grooved or knurled and a polygonally apertured flange having rounded corners extending therefrom and a carriage bolt having a polygonal locking portion and a cylindrical threaded portion capable of being tightened by a nut and lock washer which threaded portion extends through the apertured flange of each rigid element and the pierced resilient or cushioning element, such clamp-type connector being capable of clamping two bars or rods or tubes in parallel or angular relation to produce a frame to be covered by material in contact with the frame and the rounded corners of the flanges of the connector elements.

Abstract: The vertical cylinder screen in a cleaning machine is adapted to be given a rotary motion at oscillating angular velocity. This is obtained with this invention in that the cylinder screen is adapted to be given an oscillatory motion by means of a driven eccentric unit coupled to it and a rotary motion in that the eccentric unit is mounted on a carrier therefor which is adapted to rotate about the center shaft of the cylinder screen.

Abstract: A chain saw including an electromagnetic pump (4) for feeding lubricant to saw chain operative in response to an engine speed sensor (5) for sensing the rpm of an internal combustion engine and a microcomputer (6) for controlling the operation of the electromagnetic pump (4). The microcomputer (6) stores a plurality of lubricant feeding patterns covering the number of actuations of the electromagnetic pump (4), the actuation frequency and the period of time of each actuation so as to control automatically the feeding of lubricant to the saw chain from the electromagnetic pump (4) in response to the engine speed sensor (5) to effect lubricant feeding in conformity with the sawing condition.

Abstract: The scuff resistance of a high-pressure laminate is improved by incorporating in or very near the surface thereof, finely divided polyethylene wax preferably having a particle size of about 1-25 microns and a melting point of 220.degree.-230.degree. F. The wax is incorporated as part of a coating mixture applied to the face of an unimpregnated decor paper sheet in an ultra-thin layer, which layer is dried at a temperature below the wax melting point and then impregnated with conventional melamine-formaldehyde resin. The impregnated sheet is placed onto a sheet of convention phenolic resin impregnated core sheets and consolidated in the conventional way under heat and pressure. During consolidation, the wax particles "bloom", or migrate to the surface. The finished laminate surface has greatly improved scuff resistance.

Abstract: This invention relates to a method of removing frost deposits from cooling-coil batteries or the like in a freezing plant during operation, while maintaining the state of aggregation of the removed frost deposit. According to the invention the frost deposit is recurrently removed by a current of compressed air being directed towards and brought to sweep over the cooling-coil batteries.The invention also concerns an apparatus for carrying out the method, said apparatus including at least one compressed-air nozzle which is adapted to be recurrently directed towards and brought to sweep over said cooling-coil batteries in order to blow away the frost deposit.

Abstract: A displayable appendix linked to the structure of a space vehicle movable about an articulation axis from a stored position along the structure of the space vehicle to a display position by a control mechanism with abutments on the appendix and on the structure of the space vehicle so distributed and located as to prevent warping or distortion of the articulation axis and the control mechanism by exerting upon the appendix bending prestresses which are reduced near the articulation axis to a pure prestress torque tending to cause the appendix to move to the display position and temporary forces obtained from use of the abutments to hold the displayable appendix in the stored position during launch of the space vehicle.

Abstract: An apparatus for detecting the displacements of points of structures which are excited either by artificially or naturally produced forces comprises, in combination:coherent-light vibration-sensing means composed of at least one group of two laser-beam interferometers focused at a common target point of a structure;angle-sensing means rigidly connected to the interferometers of at least either group, andmeans for processing the interferometric data coming from said vibration-sensing means and the angular data coming from said angle-sensing means.

Abstract: An automatic mounting appliance for assembling clamp pins, screws, nuts and the like is adapted to be installed on a machine driven into rotation by a motor. The appliance comprises coaxial elements i.e. a holding member for receiving a portion of the pins, screws, or nuts terminated at one end by a socket, a gripping member having angular shift with respect to the holding member and terminated at one end by a socket axially adjacent to the first mentioned socket, both sockets being in coincidence only in one of two end positions, a rotary member driven by the motor, a stationary member, and a driving member radially interposed between the rotary and gripping members to frictionally drive the gripping member from the rotary member, whereby the angular shift permits locking or unlocking of the pins, screws, or nuts depending on the direction of rotation.