Abstract: A manually movable trolley (1) which is nestable with like trolleys, including a frame (3), a loading platform (7) and two upwardly extending uprights (13) located at the rear (4) of the wheel frame (3) and carrying a pushing arrangement (14), wherein a brake device (16) is provided which is controllable by the pushing arrangement (14) and effective when the trolley (1) is not in use. A brake release device (20) is provided underneath the frame (3) close to each rear wheel (9), guided in a wheel housing (10), and release parts (25) each provided with an active surface (26) are arranged on the frame (3) and are adapted to deflect the two brake release devices (20) of the preceding trolley (1?) by means of their active surface (26) when two trolleys are nested.

Abstract: The proper functionality of a first processor is checked with a second processor. The second processor thereby provides the first processor with a start value and a computation rule. The first processor carries out the specified computation rule using the predetermined start value, and returns a result to the second processor. The second processor checks the result against a stored comparison result. The computation rule is defined such that the basic instructions which are used for programming the first processor are checked.

Abstract: The functionality of a first processor is checked with a second processor. A data word with a specified number of data bits is supplied to the first processor from a second processor at specified time intervals. Each data bit is assigned a function. Having processed a function, the first processor inverts the associated data bit and, at the end of a time slice, passes the data word to the second processor, which checks the transferred data word.

Abstract: In a multiplex circuit arrangement, particularly for actuating load stations in motor vehicles, with the circuit including a bus system, an arrangement secure against malfunctions is realized in that the end of each data line (L.sub.D) is provided with a bidirectional bus coupling network (station network SN and distributor network VN) including two oppositely connected analog amplifiers (OP1, OP2), with at least a plurality of central bus coupling networks (distributor networks VN) being combined into a star-shaped central bus distributor arrangement (ZVA).

Abstract: A method and an arrangement for electronically controlling an internal combustion engine of a motor vehicle. The detecting unit is connected to a component determining the power of the engine such as a throttle flap or a control rod or an accelerator pedal and generates at least two position signals. The detecting unit is so configured that with a position change of the power-determining component, the two position signal variables change in opposition. A fault detection associated with this kind of measure permits detecting short circuits as well as shunt faults between the potentiometer wipers.

Abstract: Swivel fitting for fitting parts of a safety belt which are connectible together in a swivel relationship, including a first fitting part having a fitting portion and a cylindrically-shaped bearing eye integral therewith, the bearing eye having a truncated cutout formed therein with the wide part thereof disposed adjacent to the fitting portion and the narrow part thereof forming a centering slot centrally disposed in the cylindrical bearing eye, a plastic cylinder having a slot formed therein and being inserted in the bearing eye, a second fitting part having a substantially T-shaped extension integral therewith with a center leg and two side legs, the T-shaped extension being radially insertable into the slot formed in the plastic cylinder through the wide part of the cutout formed in the bearing eye and the center leg thereof being swingable into the narrow part of the cutout formed in the bearing eye and form-lockable therein in the axial direction of the bearing eye in an operating position.

Abstract: The invention pertains to a fuel system for internal combustion engines in which the unburned, heated fuel which is permitted to flow back to the tank from the fuel metering assembly is deaerated via an apparatus in order to prevent gases from re-entering the fuel supply pump when the fuel is reinduced thereto. By the inclusion of a jet pump between the fuel return line and the induction line, the degree of efficiency of the fuel supply pump is substantially increased.