EP 0008660 B1 19830511 - STRUCTURE IN THE FORM OF A SYMMETRICAL MAGNETIC RETAINING SYSTEM FOR RELEASE DEVICES WITH A MOVABLE ELEMENT, E.G. A PRINT HAMMER
Title (en)
STRUCTURE IN THE FORM OF A SYMMETRICAL MAGNETIC RETAINING SYSTEM FOR RELEASE DEVICES WITH A MOVABLE ELEMENT, E.G. A PRINT HAMMER
Publication
Application
Priority
DE 2837550 A 19780829
Abstract (en)
[origin: US4290356A] A moving element is held without contacts in a relatively stable holding position, out of which it is released by the application of an external force. The relatively stable holding position is obtained by superimposing a potential field of magnet edges by a further potential field based on a mechanical bias of the moving element or a magnet in such a manner that the curve of the total potential has a trough corresponding to the holding position. By applying an external force, the moving element is moved to a peak position of the total potential curve, whence it is subject to accelerating forces. Preferably rare earth magnets are used to form the potential field of magnet edges. In a print hammer actuator the moving element includes a moving coil.
IPC 1-7
IPC 8 full level
B41J 9/38 (2006.01); G06K 15/02 (2006.01); H01F 7/04 (2006.01); B41J 2/29 (2006.01); H01H 5/02 (2006.01)
CPC (source: EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0008660 A1 19800319; EP 0008660 B1 19830511; CA 1119119 A 19820302; DE 2837550 A1 19800320; DE 2965367 D1 19830616; IT 1164506 B 19870415; IT 7925297 A0 19790828; JP S5532400 A 19800307; JP S611311 B2 19860116; US 4290356 A 19810922
DOCDB simple family (application)
EP 79102636 A 19790725; CA 328966 A 19790601; DE 2837550 A 19780829; DE 2965367 T 19790725; IT 2529779 A 19790828; JP 10924279 A 19790829; US 6615679 A 19790813