Abstract: A power steering system to reduce the moment of inertia of the torque limiter and to accurately determine pressing force by a forcing member is provided. The torque limiter has a substantially-cylindrical limiter cover combined with and rotatable together with one of the output and input shafts; a limiter plate which is contained in the limiter cover and is combined with and rotatable together with the other of the output and input shafts; and a forcing member for forcing the limiter plate toward the limiter cover. The limiter cover has projecting portions formed in a circumferential line of the limiter cover by a cylindrical portion of the limiter cover that is deformed toward the inside, a disk-shaped plate is disposed between the projecting portions and the forcing member, and the forcing member, and the forcing member is supported by the projecting portions.

Abstract: A power steering system to reduce the moment of inertia of the torque limiter and to accurately determine pressing force by a forcing member is provided. The torque limiter of the system has a basic structure in which a substantially-cylindrical rotating member which is rotatable together with one of the output shaft and the input shaft; and a rotated member which is rotatable together with the other of the output shaft and the input shaft, and which is forced toward the rotating member side by a forcing member supported by the rotating member. Typically, the rotating member is a substantially-cylindrical limiter cover with a bottom, and the rotated member is a limiter plate contained in the limiter cover. The forcing member may be supported by a concave portion formed in an inner-peripheral area of the limiter cover, or may be supported by a projecting portion which is formed by deforming the cylindrical portion of the limiter cover toward the inside.

Abstract: A power steering system to reduce the moment of inertia of the torque limiter and to accurately determine pressing force by a forcing member is provided. The torque limiter of the system has a basic structure in which a substantially-cylindrical rotating member which is rotatable together with one of the output shaft and the input shaft; and a rotated member which is rotatable together with the other of the output shaft and the input shaft, and which is forced toward the rotating member side by a forcing member supported by the rotating member. Typically, the rotating member is a substantially-cylindrical limiter cover with a bottom, and the rotated member is a limiter plate contained in the limiter cover. The forcing member may be supported by a concave portion formed in an inner-peripheral area of the limiter cover, or may be supported by a projecting portion which is formed by deforming the cylindrical portion of the limiter cover toward the inside.

Abstract: In an electric power steering device, a yoke made of a tubular member and carrying permanent magnets, and a hollow motor shaft coaxially and rotatably received in the yoke to carry a motor armature which cooperates with the permanent magnets to form an electric motor for the power steering device, a section of the yoke extending from an axial end thereof to a part thereof surrounding an axial end of the motor shaft defines an inner diameter which is greater than an outer diameter of the nut member so that the output torque of the electric motor can be measured during the course of assembling the power steering device by allowing a testing tool to be inserted from the open end of the yoke without any interference and to be applied to a suitable part of the nut member or the motor shaft.

Abstract: In a brush holder device, in which an action-side end portion 22a of a torsion spring 22 is engaged with a torsion spring engaging groove 25 recessedly provided in an end surface of the brush 24 on the side opposite to a commutator 23, so that the elastic force of the torsion spring presses the brush against the commutator 23, a first inclined surface 26 is formed in the end surface of the brush 24 so as to incline at an angle of 15.degree. relative to a plane perpendicular to the axis of the brush, and second inclined surface 27 is formed in the engaging groove 25, being superposed on the first inclined surface 26. Further, a pigtail 28 is connected to the brush at an offset point relative to the engaging groove 25. Because of the second inclined surface, the torsion spring can suppress so-called "wild behavior" of the brush, and thereby, can prevent brush sound. The angle of inclination of the first inclined surface can be set at a small value, the brush can be molded using a molding die.

Abstract: In the motor armature arrangement according to the present invention, because the inner diameter (D2) of one of the axially end portions (3c) of the armature shaft (3) is reduced from the inner diameter (D1) of the motor core mounting portion (3b), the one axially end portion (3c) for mounting a bearing (8b) may be provided with a large wall thickness so that a sufficient mechanical strength can be achieved for the part for mounting the bearing without increasing the outer diameter thereof.

Abstract: In bottoms of three bolt head receiving holes 26 of a stay body 11 made of resin, there are embedded respective collars 30 by insert molding, in such a manner that both end surfaces of each collar are exposed. In an outer peripheral surface of the collar body 31, a knurled portion 32 is formed to leave a non-knurled portion 33 in a lower end portion of the collar body 31. The collar 30 is embedded in the stay body by insert molding in such a state that a slightly chamfered seating surface 34 of the non-knurled portion 33 is slightly projected from a lower end surface of the stay body 11. Since a resin adhered portion is not formed on the seating surface of the non-knurled portion of the collar, the seating surface of the collar and a fastening surface 27 of a bracket 8 is fastened by bolts 29 to be in tight contact with each other, and the stay 10 and the bracket 8 can be maintained in desired parallelism.

Abstract: In a yoke arrangement for electric motors which are particularly suitable for use in electric power steering devices, the yoke comprises a first tubular portion, a second tubular portion which has a smaller diameter than the first tubular portion, and a tapered section connecting the two tubular portions. The length of the tapered sections is desired to be minimized so that the overall length of the electric motor may be minimized. Reducing the length of the tapered section and thereby increasing the taper angle of the tapered section leads to the reduction in the mechanical strength of the yoke against an axial force. To compensate for this reduction in mechanical strength, the wall thickness of the tapered section is made larger than that of the first portion. Thus, the overall mechanical strength of the yoke can be ensured with a minimum increase in the material cost and manufacturing cost. The yoke may be formed by plastic deformation such as swaging and expansion.

Abstract: Deformation absorbing grooves 16a are recessedly provided on the inner surfaces of both side walls 15a of a main body 15 of a brush holder made of resin in the sliding direction of a brush 44, and brush holding surface portions 16b holding both end edge portions of the outer surfaces of the brush are formed at edge portions of the grooves 16a on the inner surfaces of the side walls 15a. A pair of first reinforcing ribs 16c are projectingly provided at closing end sides of cutaway portions 18 and 19 on the outer surfaces of the both side walls 15a in the sliding direction of the brush, a pair of second reinforcing ribs 16d are projectingly provided at both top sides of the outer surface of a top side wall 15d for closing an end surface across the tops of the both side walls in the sliding direction of the brush, and an end portion 46a on the reaction side of a torsion spring 46 is engaged with an engageable portion 21A projectingly provided on the first reinforcing rib 16c.

Abstract: A labyrinth ring having a section of L-shape is radially, inwardly and integrally projected from the inner periphery of a brush holder stay of a motor. This labyrinth ring provides a labyrinth construction in a space portion extending from brushes and a ball and roller bearing in cooperation with the brush holder stay, a commutator, a bearing holder and a distance ring. The thickness of this labyrinth ring is determined to be so thin as to increase the volume of a carbon accumulating space portion formed between the bearing holder and itself as large as possible.

Abstract: A field emission type electron gun comprises a cathode, an anode placed opposing the cathode, a filament placed obliquely above the anode in a space between the cathode and anode to heat the anode, a control electrode and a vacuum container housing the cathode, the anode the control electrode and the filament. The anode has an elongated body with a through hole at its center, the control electrode is provided near the anode, and means for rendering the electric potential of the control electrode to be negative to the electric potential of the anode is provided to concentrate an electron beam to the top end of the anode.

Abstract: A gasket sheet obtained by the milling and vulcanization of 50-85% by weight of a fibrous material, 10-50% by weight of a rubber material and at least 1-23% by weight of a water-insoluble and -swelling substance. The gasket sheet may be a one layer or a three layer sheet.

Abstract: This invention relates to a disk roll characterized in that the flaky vermiculite particles obtained by pulverizing the expanded vermiculite, which may be optionally mixed with a fiber material, are dispersed in water and filtered to form a thin sheet as a starting material for disk roll.

Abstract: A neutron protection thermal insulating material is obtained by adding a boron compound and, if necessary, a hydrous compound, to chrysotile asbestos fibers. To form the material, the asbestos is opened with the use of a surface active agent in the presence of water. The boron compound is added and air bubbles are incorporated into the mixture which is then dried, molded and compressed. The resulting product is characterized by a construction wherein the opened asbestos fibers are oriented in substantially parallel relation to each other and in the direction perpendicular to the compression direction and air pockets are flatly arranged between the fibers and substantially parallel thereto to reduce thermal conduction through the material in the direction parallel to the direction of compression.

Abstract: In a reed switch comprising an envelope, first and second stationary terminals, and an armature supported elastically on the second stationary terminals in such a manner that the innermost end portion of the second stationary terminal and one end portion of the armature are opposite to each other with a magnetic gap, each of the one end portion of the armature and the innermost end portion of the second stationary terminal is larger in sectional area than the other portion thereof, thereby to decrease the magnetic resistance of the magnetic gap and to increase the closing power of the switch. According to another aspect of the invention, the reed switch has a back stop for detaining the armature when the switch is opened.

Abstract: This invention relates to a method for preparing glassy fibers having protuberances studded on the surface of the fiber, characterized in that each protuberance comprises an unmelted component of the starting materials and is formed on the surface of the fiber by fiberizing the partially unmelted starting materials by a spinner or blowing technique.

Abstract: This invention pertains to a method of making inorganic vitreous fibers having small protrusions, such that the fiber produces a high strength reinforced molded product. The fibers are formed by introducing high melting constituents such as glass fiber, rock wool, ceramic fiber, silica particles, alumina particles, zirconia particles or mullite particles to molten inorganic material such that the constituents when flung from a ratary device are incorporated into the molten inorganic material.