International Business Machines Corporation

Gerhard A Wolfert

Ho Chong Lee

Jack Louis Zable

Armin Bohg

Kurt Hartmann

Ludwig Fischer

David H Rickenbach

Bruno Gantz

Upon excitation of the electromagnet, a clapper armature is pulled into an operating gap, being increasingly additionally attracted by the pole of an electromagnet yoke leg. The motional plane of the clapper armature extends perpendicularly to the plane of the magnetic flux of the yoke structure of the electromagnet.

Electromagnetic actuator mechanism in particular for print hammer drives

A heat exchange system for an electromagnetically operated print hammer of a print hammer bank provides internal and external heat transfer for the operating windings. A non-magnetic metal bobbin of the heat exchange system provides conductive transfer of heat from the interior of the operating winding to the magnetic core. Flat parallel plates of magnetic material are attached to the sides of the operating winding for external heat transfer and magnetic flux shielding. The plates may have multiple laminations having different saturation and permeability characteristics.

Electromagnetic print hammer coil assembly

Growing community of inventors

Stuttgart, Germany

Gerhard A Wolfert