Metal tubes are produced by extruding a hollow billet through an annular die opening defined by a die and a movable rod-shaped mandrel having a larger length than the tube to be produced, and by feeding the mandrel rod through the die together with the tube as it is being formed so that the tube as produced has the mandrel rod disposed therein along its entire length, whereby damage to the inner surface of the tube caused by scratching due to relative movement of the mandrel therewith is avoided…

A grinding machine having a feed nut rotatably journalled in a wheel head, a lead screw rotatably journalled in a bed being threadedly engaged with the feed nut, a worm wheel coaxially mounted on the feed nut and a worm rotatably journalled in the wheel head being meshed with the worm wheel is provided with compensating means connectable with the worm to rotate the same and thereby advance the wheel head for compensating for grinding wheel dressing and a motor for rotating the worm in an opposit…

A carding engine provided with a rotary type web stripping device for stripping a web of material from a doffer cylinder having a stripping roller assembly which includes a plurality of stripping rollers having stripping combs associated therewith. A differential gear train assembly interconnects the stripping roller assembly and the stripping rollers such that the stripping rollers are rotated in a direction which is opposite to that direction in which the stripping assembly is rotated, the str…

A copying machine is disclosed having an apparatus for cutting a roll of copying material according to the length of an original positioned on a transparent supporting table. The cutting apparatus includes a device for optically detecting the forward edge of the original. The roll copying material and a moving member carrying the detecting device are driven at the same speed. When the edge detector detects the forward edge of the original, the cutter is triggered.

The invention relates to a vehicle clutch releasing mechanism including a releasing means made of ductile material having both ranges of elastic and plastic deformation and being assembled resiliently and immovably in an axial direction in the clutch engaging state and adapted for positively serving as a pusher of the clutch disc assembly during clutch releasing operation and for compensating wearing amount of clutch facing elements of the clutch disc assembly by its plastic deformation when clu…

A rectifying tower having a laminate of rectifying elements filled with waved fins between vertical main partition plates in which each rectifying element has an auxiliary partition plate having a smaller area than that of the main partition plate which is partially disposed vertically between two opposite main partition plates in respective rectifying elements, a gas-liquid contacting chamber in the space formed between portions of two opposite main partition plates not having an auxiliary part…

Methods and apparatus are described by which detected signal pulses arising from features in a field can be associated to thereby generate so-called agglomerates of features, in dependence on the relative spacing of the features in the field. In this way it is possible to link up the detected signal pulse information relating to small features arranged approximately in straight lines. The invention generates capture zones from each feature one extending in the line scan direction and the other g…

Apparatus for assisting in the teaching of the game of golf comprising a substantially rigid, ovately curved track lying substantially in a single plane and preferably supported in a frame which is adjustable so that the plane of the track to the vertical is adjustable, a runner mounted on the track so as to be freely slidable along the track and an extensible shaft pivotally attached to the runner preferably by a ball and socket joint so as to give universal pivotal and rotational movement of t…

Diffusivity of oxygen in aqueous solutions has been increased by the introduction of a water soluble carotenoid into the solutions. Carotenoids have been found to be useful for increasing the diffusivity of oxygen in the blood, and hence are useful for the reduction of local hypoxia, which is believed to be one of the factors in development of atherosclerosis. The administration of these materials has resulted in reducing the incidence of atherosclerosis in mammals.

The invention relates to a hydraulic power brake system, comprising, a reservoir having two tanks, the two tanks being fluidically communicated or separated from each other in accordance with a predetermined liquid level thereof, a first power source connected with one of the two tanks and being normally in the operating state, a second power source connected with the other tank and being normally in the non-operating state, a valve means actuating the second power source when the first power so…