Abstract: A gas producing electrolytic cell for portable devices comprising a vessel, an electrolyte, a cap, a gas space, channel labyrinths, a separating wall and contacts. The channel labyrinths eliminate the outflow of the electrolyte from the cell in its overturned position, tender the return of electrolyte to the vessel, to the original level possible. The contacts can be inundated by the electrolyte and in this way an outer electric circuit can be closed for cutting out the stream of electrolyse and for signalizating the overturned position of the cell.

Abstract: A workpiece clamping device for the fast, central clamping of workpieces provided with holes of various number and pitch diameter and/or with a central hole, such device being adapted for the balancing of vehicle wheels. The device consists of a fixing mechanism, releasing mechanism and a clamping unit attachable to them with the workpiece. The clamping unit contains a central mandrel with a threaded end, a pressure element movable on the mandrel in an axial direction and secured against turning with respect thereto, and one or more locating elements connected to the pressure element and fitting into the hole or holes of the workpiece as well as a threaded clamping element supported by the pressure element. The fixing mechanism contains a sleeve receiving the mandrel of the clamping unit; the fixing device is provided with a selectively operated releasing mechanism. Operation of the releasing mechanism automatically disables the motor which drives the balancing mechanism.

Abstract: This invention relates to a method -- and also measuring equipment -- for establishing load-proportional working characteristics such as real load or load-proportional working time of internal combustion machines used in prime movers or machines as well as in motor vehicles.The invention is based on the conception that not only the pressure but also the average temperature prevailing during the working cycle can be utilized for establishing a load-proportional working characteristic.In the course of the method according to the invention a load-proportional system characteristic is established by measuring the temperature of the exhaust gas of the motor, and the measured value of the load-proportional working characteristic sought for is derived from the signal representing the temperature.