Actuator mechanism for a print hammer or the like

Details Actuator mechanism for a print hammer or the like Actuator mechanism for a print hammer or the like

1979-08-13

1981-09-22

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101 9348, 335234, 335207, B41J 930

Patent

active

042903564

ABSTRACT:
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.

REFERENCES:
patent: 3273091 (1966-09-01), Wales
patent: 3279362 (1966-10-01), Helms
patent: 3515452 (1976-02-01), Malmborg
patent: 3671893 (1972-06-01), Edgar et al.
patent: 3815066 (1974-06-01), Vinal
patent: 4004505 (1977-01-01), Magnenet
patent: 4054944 (1977-10-01), Lau
patent: 4192230 (1980-03-01), Blom et al.
Proebsker, IBM Tech. Discl. Bulletin, vol. 12, No. 7, Dec. 1971, p. 2238.

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