Mannesmann Aktiengesellschaft

Mannesmann Demag A.g.

Wolfgang Karpe

Johannes Kluge

Heinz Hasselmann

Klaus-Dieter Oemus

A circuit breaker is disclosed wherein two breakers are arranged in mirror image relation having their respective contacts facing each other and abutting alternately either a common contact carrier of U-shaped configurations while double contact is prevented mechanically. In an alternative version the stationary contacts are arranged for an axial operation change. The arrangement permits reduction in internal connections as well as in space requirement without loss in function as compared with known multiple circuit breaker units.

Twin-circuit breaker

A step control switch for variable speed electric motors and the like is provided in which several spring forces are utilized in various combinations in order to reduce the velocity of the thrust force of the control button in either increasing or decreasing the speed of the device being controlled. By utilizing a spring between the push button and the control body of the switch which is placed under an initial stress, and countering the force of that spring with several combinations of springs in the opposite direction, a smooth transition is achieved among the several positions of the switch.

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Wetter, Germany

Wolfgang Karpe