Siemens Aktiengesellschaft

Bernt Paul

Paul Hini

Rudolf Gebel

An electrical contact arrangement for use in a vacuum switch having two coaxially disposed contact as a contact disk which forms one of the contacts, a contact carrier having side walls forming a cylindrical chamber and having slots spiralling therein about a central axis forming a coil for generating a magnetic field, the walls also serving to support the contact disk so as to span the cylindrical chamber, and a profiled element of ferro-magnetic material contained in the chamber and having a face adjacent the contact disk with a cavity therein for evenly radially distributing the magnetic field substantially over the entire contact disk. The profiled element may have a spherical, conical, stepped or rectangular cavity therein, when seen in cross-section, and an additional supporting element of non-magnetic material may be provided within the cavity.

Contact arrangement for vacuum switches

A control system, for operating a reformed gas generator in which liquid fuel is converted with primary air and, optionally, a gas containing bound oxygen into a reformed gas, and an internal combustion engine connected thereto in which the reformed gas is burned with secondary air, which permits adaptation to changing operating conditions, in which, upon an increase of the fuel supply, the ratio of the primary air stream to the secondary air stream is increased for a short time with the increased fuel supply over the stationary condition.

Control method and control apparatus for operating a reformed gas

The invention is a flow meter comprising a magnetic field-dependent resistor arrangement whose resistances are controlled by a particularly configured control member. More specifically, the position of the control member controls the degree of flux passing from the permanent magnet of the resistor arrangement through the two magnetic field dependent resistors of the arrangement. The resistance values of the resistors thus vary as a function of the position of a control member. According to the invention, the control member comprises a throttle plate having one end clamped elastically to the flow chamber of the meter and the other end within and free to move with the medium flowing in the chamber. In this manner, by varying the pressure head of the flowing medium, the amplitude of motion of the throttle plate, and, hence, the resistance values controlled thereby are varied. A sensitive flow meter having a simple construction is thus realized.

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Erlangen, Germany

Bernt Paul