Abstract: In a gas flow control flap operating mechanism including a ball-head joint provided between an actuator drive and the gas flow control valve flap with a ball head which is received in a multipart ball-head socket, the parts of the ball-head socket are interconnected so that the ball-head socket is closed around the ball head and the ball-head socket is contained by a receiving part and includes locking means which hold the multipart ball-head socket in the receiving part and in engagement with the ball-head.

Abstract: In a gas flow control flap operating mechanism including a ball-head joint provided between an actuator drive and the gas flow control valve flap with a ball head which is received in a multipart ball-head socket, the parts of the ball-head socket are interconnected so that the ball-head socket is closed around the ball head and the ball-head socket is contained by a receiving part and includes locking means which hold the multipart ball-head socket in the receiving part and in engagement with the ball-head.

Abstract: A multi-speed gear hub shiftable under load having a hub shell, a stationary hub shaft, a bearing-mounted driver, and a planet gear mechanism having a ring gear and a planet carrier. A selector element displaces a coupler and introduces a shifting motion into the gearing system. The power travels from the driver to a pawl carrier having rotational play and then to the ring gear and the coupler via the pawls. To implement the backpedal brake, the pawls on the pawl carrier are controlled in a directionally dependent manner via a cam element that is joined nonrotatably to the driver. A spring-preloaded shifting sleeve disengages the pawls with a driving contour on the coupler which is initiated by the selector element. The ring gear carries stud-mounted displacement pawls and is split to simplify production and assembly. The braking operation is always performed in the low gear ratio and thus always exhibits the same braking effect regardless of the gear selection.

Abstract: A multi-speed gear hub shiftable under load having a hub shell, a stationary hub shaft, a bearing-mounted driver, and a planet gear mechanism having a ring gear and a planet carrier. A selector element displaces a coupler and introduces a shifting motion into the gearing system. The power travels from the driver to a pawl carrier having rotational play and then to the ring gear and the coupler via the pawls. To implement the backpedal brake, the pawls on the pawl carrier are controlled in a directionally dependent manner via a cam element that is joined nonrotatably to the driver. A spring-preloaded shifting sleeve disengages the pawls with a driving contour on the coupler which is initiated by the selector element. The ring gear carries stud-mounted displacement pawls and is split to simplify production and assembly. The braking operation is always performed in the low gear ratio and thus always exhibits the same braking effect regardless of the gear selection.

Abstract: An electric generator assembly for supplying power to electrical devices on a bicycle. The electrical generator assembly includes a gearwheel fixedly secured and rotatively coupled to a bicycle wheel proximate a hub axis of the bicycle wheel, a rotor housing, an annular stator disposed within the rotor housing, and a rotor disposed concentrically within the annular stator. The electric generator assembly further includes an arm extending from the rotor housing and configured for detachable attachment with a portion of the bicycle frame proximate the hub axis of the bicycle wheel. The rotor is driven by a rotor-driving gear disposed outside the rotor housing. The rotor-driving gear is configured to mesh with an output gear of a gear train for transmitting power from the bicycle wheel. An input pinion, configured to mesh with the gearwheel, is rotatively coupled to the input gear of the gear train.

Abstract: The invention is directed to an immersion casting pipe for feeding molten steel from a casting vessel into a mold having wide side walls and narrow side walls for the production of flat products. The immersion casting pipe has a pipe piece which adjoins the casting vessel and expands in cross section in the direction of the narrow side walls of the mold. The pipe piece is provided with a central base member at the lower end which allows for outlet openings for the melt. For the purpose of developing an immersion outlet which allows higher slab withdrawal speed of up to 6 m/min with slabs measuring 50 to 100 mm in thickness and 600 mm to 2000 mm in width, the inner wall of the portion of the immersion casting pipe which widens in cross section forms flow channels in conjunction with the opposite wall parts of the base member. The axes of the flow channels enclose an angle .alpha. between 10.degree. and 22.degree.

Abstract: An immersion nozzle (2) for metallurgical recipients, in particular for a reservoir arranged upstream of a continuous casting ingot mould, has an interchangeable discharge pipe (2) which can be attached in a leakproof manner on or in a perforated brick (1). To improve the flow conditions and hence the efficiency of the casting, the inlet side of the nozzle comprises an upper elongated section (12) in the form of a tubular shaft (11) which expands conically downward to a given plane and which is narrow in a plane perpendicular to the given plane. A second elongate section (13) ends in an elongated transverse flow section of given dimensions.

Abstract: The freewheel drive hub for a bicycle comprises a hub spindle consisting of two spindle parts axially disengageably coupled with one another. On a first of the two spindle parts, which is individually securable on the frame of the bicycle, a drive member is rotatably mounted, carrying at least one chain wheel. A hub sleeve is rotatably mounted on the second spindle part. A pawl freewheel with radial pawls pivotably mounted on the hub sleeve couples the drive member with the hub sleeve. A distance ring is loosely seated on the second spindle part on the side axially remote from the drive member. The distance ring carries an axially movable ring part which facilitates the handling of the distance ring and in the insertion of the second spindle part centers the distance ring on the hub sleeve.

Abstract: A drive hub for a bicycle has a driving member with a plurality of annular members positioned on an outer peripheral face of the driving member. A mounting sleeve is used for facilitating the assembling of the hub. This mounting sleeve is provided on its outer peripheral face with an angular positioning profile substantially identical with the torque transmitting profile of the driving member. First and second axial abutment members are provided on the outer peripheral face of the mounting sleeve adjacent a first and a second axial end of the mounting sleeve. Centering tongues and counter centering grooves are provided on one axial end of the mounting sleeve and on the driving member, respectively. When these centering elements are brought into engagement, the angular positioning profile of the mounting sleeve is both in axial and angular alignment with the torque transmitting profile of the driving member.

Abstract: A wheel hub for a two-wheeled vehicle, such as a bicycle, includes a quick clamping device for securing the hub axle in the fork of a bicycle frame. The device includes a clamping unit at each end of the hub axle. Each clamping unit contains an adjusting nut screwed onto one end of the axle, a thrust ring inboard of the nut, and a pivotally movable clamping member with eccentric cams positioned between facing surfaces on the nut and thrust ring. By pivoting the clamping member the position of the cams is changed for displacing the clamping device from the release position to the locking position where the hub axle can be tightly clamped in the fork without any special shaping of the axle.

Abstract: The roll has an inner axial flow space extending into conical flow spaces with wider ends facing away from each other. Cooling water is fed to and discharged from central axial bores in the roll, there being radial distributor and collecting ducts leading from these central bores to the widest diameter portions of the conical flow spaces.

Abstract: The supporting structure of a disk brake for a bicycle includes a tubular guide bounding a cylindrical, axially open passage in which first and second actuator members are axially movable, the first member being moved angularly by an operating device while the second member is secured against angular movement and moved axially by an interposed cam mechanism in response to the angular movement of the first member. A casing mounted on the first actuator member for limited axial movement partly envelopes the guide. An opening in the casing in a plane transverse to the axis receives a disk attached to the wheel to be braked for axial engagement between brake linings on the casing and the second actuator member respectively when the first actuator member is moved by the operating device.

Abstract: Continuously cast ingots are spray-cooled by a fanned-out flow of water which has been accellerated by pressurized air with an original nozzle direction parallel to the surface of the ingot and transversely to the direction of ingot withdrawal. The arrangement avoids cooling impediment on account of the Leiden frost phenomenon.