Abstract: A universal double-jointed coupling for railway vehicles with two joint levels comprises two coupling joints which are interconnected via a shaft that is surrounded by a hollow pinion shaft in order to transmit torque by means of said hollow pinion shaft. One joint level is assigned to a coupling joint encompassing a crowned gear that has angular and axial compensation capability while the other joint level is associated with a torsion-proof, flexible coupling joint.

Abstract: The invention relates to a universal double-jointed coupling (1) for railway vehicles with two joint levels (20, 21). Said coupling (1) comprises two coupling joints which are interconnected via a shaft (5) that is surrounded by a hollow pinion shaft (6) in order to transmit torque by means of said hollow pinion shaft (6). One joint level (20) is assigned to a coupling joint (2) encompassing a crowned gear (22) that has angular and axial compensation capability while the other joint level (21) is associated with a torsion-proof, flexible coupling joint (3). The aim of the invention is to ensure that coupling elements can be replaced easily and freely without any problem in the area of the coupling joint encompassing the crowned gear. Said aim is achieved by providing the coupling joint (2) encompassing the crowned gear (22) with a removable internal geared sleeve (7) and a removable matching externally geared coupling hub (23).

Abstract: The invention relates to a drive unit for electric rail vehicles, wherein the hub (7) of a greater wheel (6) driven by an electric traction motor (1) via a pinion shaft (4) forms a hollow shaft stub which surrounds the shaft (9) of a wheel set with a defined play. By inserting a coupling (11) which is radially rigid but allows transverse and angular movements, the motor torque is transmitted to one of the wheels (10) of the wheel set. The axial mobility of the coupling (11) should not have any disturbing restoring forces or resilient forces. Therefore, the hub-side coupling half (11b) having a curved-teeth-shaped external toothing engages the wheel-side coupling half (11a) which is provided with a straight internal toothing. The wheel-side coupling half (11a) is detachably connected via coupling supports to the inside flank of a disk wheel (10) and the hub-side coupling half (11b) to the hub.

Abstract: It is frequently observed that when a real locomotive starts up, the front set of drive wheels commences to turn before the rear set of drive wheels begins to turn. The present invention is a simple device that permits this effect to be simulated in a model locomotive. The electric motor of the model locomotive drives a worm which turns a first gear. A second gear is mounted on the same shaft as the first gear but is not otherwise connected to the first gear. From the side of the first gear that faces the second gear, a pin extends at a particular radius. Similarly, two pins extend at the particular radius from the side of the second gear that faces the first gear. When the motor starts, the first gear turns immediately, but rotation of the second gear is delayed until the pin on the first gear strikes one of the pins on the second gear. In this way a delayed rotary motion is imparted to the second gear.

Abstract: In a powered truck or bogie for a railway vehicle having steerable wheelsets which pivot with respect to the truck or bogie frame, the motor for each wheelset is mounted to the truck or bogie frame and coupled to the drive transmitting means by a flexible coupling having a substantially vertical pivotal axis which axis is coincident with the real or virtual pivotal axis of the wheelset with respect to the truck or bogie.

Abstract: A bogie for rail cars comprises a traverse which has a portion at each side which extends forwardly and rearwardly and includes a central pin which is engaged in a support box of a half bogie. Each side of the traverse carries a pin which engages in the support box of an associated bogie and the bogie is capable of some vertical and horizontal rotation in respect to the pin. The traverse is supported on springs which extend between the overlying traverse and the underlying bogie at a longitudinally spaced location from the pin. Forward and rear wheel sets are supported in the associated bogies at respective ends thereof and they carry a driving motor therebetween having a planetary gearing which is connected to drive the associated wheels of each set. The bogies are advantageously interconnected by transversely extending tie rods arranged at spaced longitudinal locations in respect to the support pin.

Abstract: In a model of a steam locomotive having two independent sets of driving wheels, the single electric motor for driving the model is coupled to the two sets of driving wheels via a differential gear. The latter allows the two sets of driving wheels to alter their angular positions relative to each other, owing to track irregularities and other causes, and thereby enables the model to operate more realistically.