Abstract: A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by treating a metal material with hydrochloric acid through the first cellulose column, eluting through development the noble metal component adsorbed on the cellulose with a hydrochloric acid/2-propanone mixture to obtain a fraction containing light platinum-group metals and a fraction containing heavy platinum-group metals and gold, separating the former fraction with the above mixture into fractions containing palladium, ruthenium and rhodium respectively, passing the fraction containing heavy platinum-group metals and gold through the second cellulose column to made them adsorbed on the cellulose, eluting them from the cellulose with a hydrochloric acid/1-butanol mixture to obtain fractions containing gold, osmium, iridium and platinum respectively, and recovering the noble

Abstract: A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by treating a metal material with hydrochloric acid through the first cellulose column, eluting through development the noble metal component adsorbed on the cellulose with a hydrochloric acid/2-propanone mixture to obtain a fraction containing light platinum-group metals and a fraction containing heavy platinum-group metals and gold, separating the former fraction with the above mixture into fractions containing palladium, ruthenium and rhodium respectively, passing the fraction containing heavy platinum-group metals and gold through the second cellulose column to made them adsorbed on the cellulose, eluting them from the cellulose with a hydrochloric acid/1-butanol mixture to obtain fractions containing gold, osmium, iridium and platinum respectively, and recovering the noble

Abstract: Disclosed herein is a shift mechanism in a manual transmission having a detent mechanism which comprises a cylindrical holder provided with an opening at its one end, a detent ball accommodated in the holder at the opening and adapted to contact with one of detent grooves, and a compression spring accommodated in the holder and adapted to bias the detent ball against one of the detent grooves. The opening of the holder is inwardly bent at its circumferential edge to form a ball retaining portion for projecting a part of the detent ball therefrom and retaining the detent ball so as not to come out from the opening.

Abstract: A rotary shaft having a bearing surface and an oil seal surface formed close to each other at a portion of a shaft body rotatably mounted in a case of a transmission, wherein a groove is circumferentially formed on the periphery of the shaft body between the bearing surface and the oil seal surface before each of the surfaces is finished, so that the bearing surface and the oil seal surface can be finished so as to be suitable for their respective functions.

Abstract: Disclosed herein is a shift fork in a transmission for an automobile having a fork body made of steel plate and a pawl member made of resin fixed to the free ends of the fork body and adapted to engage an annular groove defined on the outer circumference of a hub sleeve included in a clutch mechanism for the transmission.The pawl member has a stepped portion formed at the opposed portion to the outer peripheral edge of the annular groove so as not to abut against the outer peripheral edge during a shift operation.

Abstract: An auxiliary radially shifting mechanism for vanes in a pump of the vane type having a cup-shaped cylinder, a rotor eccentrically and rotatably received within the cylinder, a number of vanes radially shiftably disposed within the rotor, and a bracket closing the cylinder at its open end, is provided in the form of a ring-shaped element formed on the bracket so as to protrude therefrom towards the side of the vanes in such a manner that it is disposed asymmetrically but only partially around the center of the rotor.

Abstract: An auxiliary radially shifting mechanism for vanes in a pump of the vane type having a cup-shaped cylinder, a rotor eccentrically and rotatably received within the cylinder, a number of vanes radially shiftably disposed within said rotor, and a bracket closing the cylinder at its open end, is provided in the form of a ring-shaped projection formed on the bracket so as to protrude therefrom towards the side of the vanes and to surround the rotor, the outer edge of the projection being rounded.

Abstract: A gear-shift mechanism for a power transmission unit includes a fork shaft slidably supported from a housing assembly to be selectively shifted from its neutral position to forward and reverse positions, a detent mechanism for selectively retaining the fork shaft in its neutral and shifted positions, a shift head member slidable on the fork shaft, a one-way engagement mechanism for effecting engagement of the shift head member with the fork shaft in axial movement of the fork shaft to and away from its reverse position, and a shift arm member pivoted to the inner wall structure of the housing assembly and linked with the shift head member to retain an idler gear in its neutral position and to engage the same with driving and driven gears. The shift arm member is formed with a cam face, and a spring loaded cam follower is assembled within the inner wall structure to be in engagement with the cam face of the shift arm member to effect disengagement of the idler gear from the driving and driven gears.

Abstract: A gear-shift mechanism for a power transmission unit includes a fork shaft slidably supported from a housing assembly to be selectively shifted from its neutral position to forward and reverse positions, a detent mechanism for selectively retaining the fork shaft in its neutral and shifted positions, a shift head member slidable on the fork shaft, a one-way engagement mechanism for effecting engagement of the shift head member with the fork shaft in axial movement of the fork shaft to and away from its reverse position, and a shift arm member pivoted to the inner wall structure of the housing assembly and linked with the shift head member to retain an idler gear in its neutral position and to engage the same with driving and driven gears.

Abstract: A shift fork support structure in a manual transmission of such a type that a shift fork is axially slidable on a fork shaft comprising a bushing press-fitted into apertures formed on the shift fork and engaging the fork shaft. The inner peripheral surface of the bushing is coated by Teflon layer. With this structure, the frictional resistance between the shift fork and the fork shaft may be reduced, thus permitting the shift fork to be smoothly operated.