Abstract: The device for winding coils for electrical machines has a spindle box which can be displaced along a guide, a multi-part template held thereon fixed against relative rotation, which can be axially aligned with a coil receiver and can be adjusted to be variable in width. A wire guide rotates around the template and in the process creates coil windings. When the coil width is changed, it is necessary to correctingly adjust the spindle box, so that the alignment of a part of the template with the coil receiver is maintained. A measuring system is provided to assure this axial alignment of the parts with great certainty, which measures the distance between a point on the template part and a point on the spindle box as well as the distance between a point on the spindle box and a point on the machine frame.

Abstract: A device is provided for forming coils which are inserted into radially inwardly open slots of a stator or rotor plate pack of an electric machine. The device enables intermediate forming of coils disposed in specific slots in order to also allow insertion of the coils of a further winding in the same slots and thus allow free forming. The device comprises a holding device for the plate pack and a forming mandrel. The latter includes a plurality of radially extendable laminae distributed about the periphery thereof. Different groups of laminae can be extended by a predetermined radial path length by push rods which can be driven independently of one another in order to force outwardly, and form in certain slots, the coil strands that have been inserted into the slots. Further, forming rings which are axially movable relative to the plate pack are provided to enable forming of winding heads.

Abstract: A density monitoring gauge is disclosed which modifies a Bourdon tube manometer by introducing a compensating element between the end of the Bourdon tube and the pointer actuating mechanism. The compensating element is designed to accommodate for changes in circumferential length of the Bourdon tube induced by temperature as well as to compensate for pressure changes in a closed system attributed directly to changes in gas temperature within that closed system. The compensating means may consist of a bimetallic member having an .OMEGA. configuration. Alternatively, the compensating means may include a pair of synthetic material rods connected by a thermally stable member such that linear thermal expansion of the rods is additively connected between the tube spring and the pointer actuating mechanism. The density measuring device is desirably used in connection with sulfur hexafluoride insulated electrical switching gear.