Abstract: The present invention relates to an electron beam-irradiating reaction apparatus for irradiating a desired object to be treated, such as an exhaust gas, with an electron beam. Conventionally, a scanning tube of an electron beam irradiation device and a reaction device-for receiving the electron beam are rigidly connected. Therefore, excessive stress is applied to a connecting portion between the scanning tube and the reaction device and not only leakage of gas from the connecting portion, but also breakage of a metal window foil provided at an end portion of the scanning tube are likely to occur. In the present invention, to solve such problems, a flexible hermetic sealing member 23 is provided between a portion around the end portion of the scanning tube 12 and a peripheral edge 18a of an electron beam receiving window in a side wall of an electron beam reaction device 18.

Abstract: In an electric starter motor, a planetary reduction assembly includes: a sun gear engraved in an outer circumferential portion on a front side of a motor output shaft formed integrally with the armature; a ring formed into a cylindrical shape with a rotation stop projecting on an outer circumferential wall surface thereof and coupled to a front bracket while its movement in the circumferential direction is restricted by the rotation stop; an internal gear formed into a bottomed cylindrical shape with a center hole formed in a central portion of a bottom thereof and an inner circumferential gear portion engraved in an inner circumferential wall surface thereof, the internal gear being fitted in the ring so as to open on a rear side; a discoid flange portion formed integrally with an end portion on the rear side of the starter output shaft, supported rotatably to the bottom of the internal gear through a bearing and rotatably supporting an end portion on the front side of the motor output shaft through a bearin

Abstract: A manufacturing method of a cylindrical yoke including a bottom portion to which an opening 12a is formed to journal the starter output shaft of a planetary gear-type starter incorporating a planetary gear reducer, and an inner peripheral gear portion formed to the vicinity of the bottom portion, the yoke functioning as the field magnet of a motor in the planetary gear-type starter. The yoke is formed by subjecting a metal disk 10 to cold spinning. As a result the inner peripheral gear portion of the yoke and a thin portion can be easily formed and miniaturization, reduction in weight and cost reduction are realized.

Abstract: In a starter, an armature is covered with a cylindrical yoke. A rear end opening portion of the yoke is spread perpendicularly outward so as to form a flange. A disc portion having a larger outer circumferential portion than the outer diameter of the cylindrical portion of the yoke is formed. A spigot portion provided in the outer circumference of the disc portion is fitted to a spigot portion provided in the frontmost of a cylindrical portion of a metal rear bracket so that the yoke and the rear bracket are fixedly connected to each other. Therefore, a brush device not limited by the outer diameter of the yoke can be provided. Accordingly, a long-life starter can be obtained by using sufficiently long brushes.

Abstract: A process for desulfurization and denitration of waste gas by multi-stage electron beam irradiation and an apparatus used for the process are constituted so that the waste gas is passed through the electron beam irradiation zones in multiple irradiation chambers that are arranged in such a way that the center-to-center distance (m) between two neighboring electron beam generators is not shorter than distance X calculated by the formula, X=2.alpha.+tV wherein 2.alpha. means distance over which an absorbed dose extends into a waster gas, t means a residence time (sec.) of waste gas in a non-irradiation zone, and V stands for the flow velocity of waste gas, whereby t can be reduced to 0.01-0.5 seconds, so that irradiated energy can be utilized efficiently and a maximum effect can be obtained with a minimum expenditure of irradiation energy. Therefore, the waste gas can be treated rapidly and economically.

Abstract: An engine starter apparatus comprises a housing (9), a d.c. electric motor (2), an output rotary shaft (3) with a pinion (7), and a planetary speed reduction gear (5). The planetary speed reduction gear (5) comprises a sun gear (11), an internal gear (20), a plurality of planetary gears (12) disposed between the sun gear (11) and the internal gear (20), and a planetary gear carrier (10) connected to the output rotary shaft (3) for rotatably supporting the planetary gears (12). The internal gear (20) comprises a ring-shaped internal gear member (20a), and elastic reinforcing ring member (21,22; 24) for elastically supporting the internal gear member (20a), thereby to increase rigidity of the internal gear member (20a).

Abstract: A device for supporting an overhang type slidable pinion shaft of an electric motor for starting an engine comprises a bearing for supporting the pinion shaft, the bearing including an inner ring having a groove provided in its inner peripheral surface. Accordingly, it is possible to secure grease or oil in the groove provided in the inner peripheral surface of the inner ring of the bearing and it is therefore possible to minimize the boundary friction occurring between the inner peripheral surface of the inner ring of the bearing and the sliding surface of the pinion shaft and, at the same time, enable the pinion shaft to slide even more smoothly.

Abstract: A water draining device 18 for a starter motor, adapted to be attached to the starter casing or bracket 4, has a tubular body 18b whose inner circumferential surface is of labyrinth structure and which is made of an elastic material. A root portion 18c of the tubular body is thinner and more deformable than the rest of the tubular body such that it bends upon external water impact to prevent invasion thereof.

Abstract: A moisture drain structure for an engine starter motor comprises a drain conduit integrally formed on a rear bracket of a housing to define therein a drain channel. The interior and the exterior of the housing communicate through the drain in the bracket which is formed at the same time a channel and spigot joint element is machined and which is located at the thinly machined portion of the spigot joint of the rear bracket. A method for manufacturing the moisture drain structure is also disclosed.

Abstract: In an engine starter having a planet reduction gear mechanism including a planet gear arm formed integrally on a driven shaft of the mechanism and having a plurality of holes and a corresponding number of roller pins pressure-inserted into the holes from one side surface of the planet gear arm and rotatably supporting planet gears, respectively, each hole is chamferred in the other side surface of the planet gear arm to receive a protrusion to be formed in the other side by the pressure-insertion of the roller pin.

Abstract: At least one axial groove is formed on an output shaft which extends from an end of the output shaft to a stop ring groove and has a depth substantially equal to that of the stop ring groove to allow a stop ring fitted therein to be pushed up by a pin or the like inserted along the axial groove into the stop ring groove. A stop ring groove may be formed in a position on the output drive shaft adjacent to an end thereof, and an extension of a pinion drive shaft is provided which extends from an end face of the pinion drive shaft to form a cylindrical protective cover for a stopper fitted by the stop ring received in the groove and protruding from the end surface of the pinion drive shaft when the latter is retracted fully.

Abstract: A device for supporting an overhang type slidable pinion shaft of an electric motor for starting an engine comprises a bearing for supporting the pinion shaft, the bearing including an inner ring having a groove provided in its inner peripheral surface. Accordingly, it is possible to secure grease or oil in the groove provided in the inner peripheral surface of the inner ring of the bearing and it is therefore possible to minimize the boundary friction occurring between the inner peripheral surface of the inner ring of the bearing and the sliding surface of the pinion shaft and, at the same time, enable the pinion shaft to slide even more smoothly.

Abstract: A brush device in a rotary electric machine such as a starter motor. Brush accommodating arrangement of the brush device for accommodating brushes and brush springs are provided with a plurality of through-holes to radiate heat therethrough efficiently. The brush device is simple in construction and high in heat resistance.

Abstract: In an over-running clutch including a cylindrical clutch outer, a clutch inner located inside an inner periphery of the clutch outer and defining a wedge-shaped space between the same and the inner periphery of the clutch outer, an engagement member mounted in the wedge-shaped space, an elastic member of urging the engagement member in a convergent direction of the wedge-shaped space, a washer for closing the wedge-shaped space, and a cover fitted on an outer periphery of the clutch outer for fixing the washer; a method of mounting the cover comprising the steps of bending a front end portion of the cover inwardly at an acute angle, insertingly engaging the cover with the outer periphery of the clutch outer, bending back the front end portion at right angles and bending the rear end portion of the cover to fix the cover to the clutch outer.

Abstract: A method for manufacturing a hollow cylindrical magnetic yoke assembly for a magnet-type electric motor, including a plurality of permanent magnets attached to the inner peripheral surface of the yoke. The method comprises the steps of expanding a hollow cylindrical tube of a magnetic material by an expander having a plurality of expander elements capable of being moved radially outwards to expand the radius of the tube. The number of the expander elements is equal to the number of the permanent magnets of the electric motor, and one permanent magnet is fitted to each concaved surface of the magnetic yoke formed by the convexed cylindrical outer surface of each expander element.

Abstract: A starting motor comprising an epicycle reduction gear, a sun gear installed at the end of the rotary shaft of a driving motor, a plurality of planet gears engaging with the sun gear, a flange for supporting the planet gears, and an internal gear having cylindrical means including an output shaft driven by the revolution of the planet gears and a gear formed on the inner peripheral face thereof, the gear engaging with the planet gears, and a side plate extended from the cylindrical means in the diametric direction and positioned opposite to the flange, a pinion capable of sliding on the output shaft, a bearing surface being formed on either the flange or side plate to allow the opposite contact to slide thereon and a recess filled with grease being provided in the bearing surface.

Abstract: A starter with a gear reduction mechanism including an internal ring gear formed of synthetic resin and a reinforcing member. The internal ring gear has a cylindrical portion and a toothed portion formed on an inner peripheral surface of the cylindrical portion. The reinforcing member is secured around an outer surface of the cylindrical portion.

Abstract: A planetary gear starter with a molded synthetic resin ring gear supported by a frame is disclosed. The ring gear has longitudinally-extending ribs formed in its outer surface which confront longitudinally-extending inward projections formed in the inner surface of the frame. A cylindrical elastic member has an annular portion which is press fit over the ring gear and longitudinally-extending projections which fit into the cavities formed between adjacent ribs and inward projections in the frame. The projections of the elastic member serve as shock absorbers and elastically transmit torque from the ring gear to the frame. The elastic member has an annular portion which reinforces the open end of the ring gear.

Abstract: A gear having a good balance of mechanical characteristics such as shock resistance, wear resistance, and flexible strength is molded from nylon resin containing 3-10 wt % of carbon fibers and 20-40 wt % of glass fibers.

Abstract: A reduction gear device is used for a coaxial type starter and is disposed between a rotary shaft of a motor and a rotary shaft of a starter pinion, both shafts being arranged in the same axial line. In the reduction gear, a through hole is formed in a machine frame for a reduction gear to cause air flow and a labyrinth-sealing structure for prevention of dust is formed near the through hole.