Abstract: A control system for a four-wheel drive transmission comprising a primary transmission and a transfer unit capable of establishing a high-speed four-wheel drive mode, a low-speed four-wheel drive mode and a two-wheel drive mode by the agency of friction coupling devices which are controlled selectively for engagement and disengagement by the corresponding hydraulic servomechanisms.

Abstract: A transmission for a vehicle has a main transmission system which can be set to any one of a plurality of speed stages, and a transfer transmission system which receives power from the main transmission system and can be selectively set either to a two wheel drive operational mode or a four wheel drive operational mode.

Abstract: An anthracycline compound, Arugomycin, having the physicochemical properties set forth below is produced by aerobically cultivating an Arugomycin-producing Streptomyces strain in a suitable culture medium, and recovering from the culture the anthracycline compound, Arugomycin.(1) Color and form:Orange powder(2) Melting point:207.degree. to 213.degree. C. (decomposed)(3) Specific rotatory power:[.alpha.].sub.D.sup.25 =+112.degree.(C: 0.1, chloroform:methanol=9:1)(4) Elementary analysis (%):______________________________________ C H O N ______________________________________ Found 56.2 6.9 35.1 1.8 Calcd. 56.7 6.7 34.9 1.7 ______________________________________(5) Ultraviolet and visible absorption spectrum: as shown in FIG. 1. ______________________________________ .lambda..sub.max (E.sup.1% .sub.1cm) ______________________________________ CH.sub.3 OH 235(363), 258(167), 292(61), 476(104) 0.1N HCl + CH.sub.3 OH 235(387), 258(159), 292(61), 468(110) 0.1N NaOH + CH.sub.

Abstract: An antibiotic, Spicamycin, having the physicochemical properties set forth below is produced by aerobically cultivating a Spicamycin-producing Streptomyces strain in a suitable culture medium, and recovering from the culture the antibiotic, Spicamycin.(1) Color and properties: Weakly acidic white powder(2) Melting point: 215.degree. to 220.degree. C. (decomposed)(3) Specific rotatory power: [.alpha.].sub.D.sup.25 =+15.degree. (C: 0.15, in methanol)(4) Elementary analysis (Found): C: 57.4%, H: 8.3%; N: 15.7%, O: 18.6%(5) Ultraviolet absorption spectrum (maximum):______________________________________ CH.sub.3 OH 264 nm (E.sub.1cm.sup.1% 257) 0.01N NaOH + CH.sub.3 OH 272 nm (E.sub.1cm.sup.1% 226) 0.01N HCl + CH.sub.3 OH 273 nm (E.sub.1cm.sup.1% 258) ______________________________________(6) Infrared absorption spectrum (as measured by the potassium bromide method): As shown in FIG. 2.(7) Solubility in Solvent: Soluble in basic water, dimethyl sulfoxide, methanol, ethanol, n-propanol, and n-butanol.

Abstract: A control system for a belt drive continuously-variable speed automatic transmission (CVT) for a vehicle wherein the discharge speed of a working fluid from a hydraulic servomotor provided on an input pulley of CVT is restricted by a downshift control mechanism to prevent a slip produced at the time of kickdown. The downshift control mechanism comprises a downshift controlling solenoid valve, a reduction ratio control mechanism and an electric control circuit for controlling these elements, wherein at the time of the kickdown, the solenoid valve is deenergized to close a drain port for the hydraulic servomotor of the reduction ratio control mechanism, and at the time of the coastdown, the solenoid valve is energized to open the drain port for the hydraulic servomotor of the reduction ratio control mechanism.

Abstract: A power transmission endless belt formed by connecting in succession a plurality of metal blocks each having at least a through hole or a recess to an endless connecting band formed by connecting a plurality of link plates with pins. The endless connecting band is inserted through the through hole or the recess of the metal block and the metal block is connected to the link plates with a pin or is retained between two pins.

Abstract: A hydraulic control system for a four-wheel drive transfer mechanism for vehicles, including an automatic transmission, a transfer mechanism having a two-wheel drive direct-coupling gear (H.sub.2), a four-wheel drive direct-coupling gear (H.sub.4) and a reduced-speed four-wheel drive gear (L.sub.4) and a hydraulic control circuit for controlling the transmission and the transfer mechanism. The transfer mechanism includes a reduction gear mechanism, a first output shaft, a second output shaft connected to the first output shaft by means of a linkage, a four-wheel drive clutch for detachably connecting or disconnecting the first and second output shafts, direct-coupling clutch for connecting or disconnecting the input shaft of the reduction gear mechanism and the first output shaft and a reduced-speed drive brake for shifting the reduction gear mechanism into the reduced-speed range.

Abstract: A torque transfer mechanism includes the output shaft of a power source to be connected to the rear axle, a first intermediate output shaft disposed concentrically with said output shaft, a second intermediate output shaft to be connected to the front axle, a power transmitting means for drivingly connecting said first and second intermediate output shafts, and a frictional coupling means interposed between said output shaft and said first intermediate output shaft. Said frictional coupling means comprises frictional members, a first cylinder, a first piston received in said first cylinder and adapted to apply a pressure to said frictional members, a second cylinder formed in said first piston, and a second piston received in said second cylinder. When the pressurized fluid is supplied only to said second cylinder, a slip between said output shaft and said first intermediate output shaft is allowed during the running of the vehicle along a curve to allow easy running operation of the vehicle.

Abstract: In the four-wheel drive transfer apparatus for the automotive vehicle's automatic transmission which includes input shaft, a first output shaft coaxially aligned with the input shaft and normally having a power transmission from the input shaft, and a second output shaft in parallel with the first output shaft and having a power transmission from the input shaft when the four-wheel drive is selected, the improvement further includes a wet-type multiple-disc clutch member, a wet-type multiple-disc brake member, and a planetary gear set interposed between the input shaft and the first and second output shafts and containing gearing elements selectively operated by the clutch member and brake member so that the gearing elements engage with or disengage from each other, whereby the clutch member causes the input shaft and the second output shaft to engage with each other so as to switch between the two-wheel drive and four-wheel drive during the vehicle running conditions and enable the transfer apparatus to prov

Abstract: A four wheel drive torque transfer mechanism with a hydraulic control system is switchable between two wheel drive and four wheel drive during running of a vehicle having an automatic transmission.When a two wheel drive mode of operation is selected, the hydraulic control system automatically actuates the torque transfer mechanism to provide a four wheel drive operation if a governor output responsive to vehicle speed, falls below a predetermined level, and to provide a two wheel drive operation if a governor output exceeds the predetermined level.

Abstract: Pressurized lubricant from a vehicle transmission is inputted to a lubrication system of a four-wheel drive torque transfer mechanism through a cental oil passage in the transmission's output shaft. The transmission shaft coaxially joins with a shaft of the four-wheel drive torque transfer mechanism, said shaft also having a central oil passage. Lubricant leaves the central passage of the torque transfer mechanism shaft through radial oil passages to lubricate bearings and friction surfaces. Pump or splash lubrication is not used in the lubrication system for the four-wheel drive torque transfer mechanism.

Abstract: A four wheel drive torque transfer mechanism with a hydraulic control system is switchable between two wheel drive and four wheel drive during running of a vehicle having an automatic transmission. A reducer permits direct coupling or reduced speed ratio drives. A parking gear associating with the transfer device requires only small modification to the conventional parking mechanism. The hydraulic control system automatically actuates the reducer to provide a reduced speed-high torque output when a governor output responsive to vehicle speed, falls below a predetermined level.

Abstract: A transmission for four-wheel drive vehicles of the type having a four-wheel drive transfer disposed between the front transmission section having a gear train or a planetary gear train therein and the rear transmission section to which lubricating oil or hydraulic operating fluid is to be introduced, the improvement comprising a wet type or multi-plate clutch for the four-wheel drive transfer which permits a smooth switching over between a two-wheel drive mode and a four-wheel drive mode while the vehicle is cruising, and further comprising a fluid path which connects between the bottom of the rear transmission section and the front transmission section and through which the lubricating oil or hydraulic operating oil in the rear transmission section can be smoothly returned to the oil pan located under the rear transmission section.