Other

Dorina Nahmaschinen Gmbh

Bernhard Stehlin

Ludwig Pietzsch

Manfred Wamser

Joachim H Wilken

Volker Pathe

Joachim Wilken

A stabilizing and aiming drive for the turret (2) of a vehicle (1) comprises brake surfaces at revolving rings (6,7) which are supported for rotation at the vehicle superstructure or at the turret. The revolving rings (6,7) are driven in opposite directions by an electric motor (20) acting through driven pinions (23,24), and they carry brake surfaces (10,11). These brake surfaces face the friction linings (12,13) which are adapted to be acted upon by magnetic structural units (16,17) provided at the turret or vehicle superstructure for engagement with the brake surfaces, in order to thereby apply controlled stabilizing and aiming moments on the turret.

Stabilizing and aiming drive means for a turret of a vehicle

Method and apparatus for positioning and altitude-stabilizing an inert mass slewable on a movable base in at least one axis are disclosed. Oppositely rotatable driving parts are supported on either the base or the mass, and the driven parts on the other of the base or mass are friction coupled to the driving parts under the control of one or more control devices. The control devices are controllable electromagnetic clutches or brakes, and control of the magnetic field is achieved by the hyperexcitation through feedback and intensification of the measured magnetic field strength and/or the control torque.

Device for positioning and attitude-stabilizing a slewable

The sewing machine includes respective setting members for adjusting the overstitch width and the stitch length, with the setting members being adjusted by an actuating mechanism responsive to control signals of a program control system, the control signals corresponding to the stitches to be made. The power for driving the actuating mechanism is derived from the continuously operating main shaft of the sewing machine, through a clutch or clutches whose moment to be transmitted is controllable, such as electromagnetic clutches. In one embodiment of the invention, a single electromagnetic clutch is provided for each setting member and includes a first clutch disk connected to the respective setting member to rotate therewith and a second clutch disk secured to a shaft continuously rotated by the main shaft of the machine. A spiral spring is provided to act to rotate the respective setting member in a direction opposite to the direction of rotation thereof by the associated clutch. In a second embodiment of the invention, two clutches are provided to rotate each setting member, each clutch including a first clutch disk. One clutch includes a second disk rotated by a shaft continuously driven by the main shaft, and the other clutch includes a second disk rotated directly by the main shaft, the two second clutch disks rotating in respective opposite angular directions. Thereby, the setting member is adjusted in accordance with the relative moments exerted by the two clutches.

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Ettlingen, Germany

Bernhard Stehlin