Electric actuating device

Details Electric actuating device Electric actuating device

1978-01-31

1980-08-26

Eickholt, E. H.

Recorders

Printing, dotting, or punching marker

Helical record-effecting element

101 9329, 346141, 335272, 310 36, G01D 942

Patent

active

042198259

ABSTRACT:
A printing device for chronocomparators comprising a striker, an ironless cylindrical coil mounted for rotation in an air gap of a magnetic circuit and connected to the striker, the magnetic circuit being formed by a permanent magnet placed inside the coil and an outer part of magnetically permeable material surrounding the coil. The coil is connected through spiral springs to a source of electric control pulses. The spiral springs provide a return force for bringing the coil back to a rest position in the absence of a control pulse. A cylinder with a helical rib is placed to be stricken by the striker and a recording strip is inserted between the striker and the said cylinder.

REFERENCES:
patent: 3138427 (1964-06-01), Stein et al.
patent: 3138429 (1964-06-01), Cooley
patent: 3289133 (1966-11-01), Bieger et al.
patent: 3293653 (1966-12-01), Amada
patent: 3479626 (1969-11-01), Silverman et al.
patent: 3486148 (1969-12-01), Christensen
patent: 3501726 (1970-03-01), Olesen
patent: 3757348 (1973-09-01), Hoopes
patent: 3970979 (1976-07-01), Montagu
patent: 3970980 (1976-07-01), Nelson
patent: 4084502 (1978-04-01), Heyraud et al.

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