Telegraphy – Systems – Simplex-reversing periodic
Patent
1974-04-22
1976-02-10
Hecker, Stuart N.
Telegraphy
Systems
Simplex-reversing periodic
346 77R, H04N 110, H04N 124
Patent
active
039378730
ABSTRACT:
In an engraving machine for use in making watermarks in which a table, on which a plate to be engraved and a model are to be mounted, is reciprocable longitudinally by a first lead screw and an engraving head is carried by an arm and provided with a stylet movable in response to information provided by an optical reading head mounted on a carriage movable transversely by a second lead screw controlled by a ratchet means, the engraving head is mounted on a carriage independently of the reading head, which carriage is movable transversely by a third lead screw driven substantially in synchronism with and by the second lead screw through a gear train, the maximum amplitude of oscillation of the stylet is adjustable and of the order of 3 to 4 mm.
REFERENCES:
patent: 2575546 (1951-11-01), Boyajean
patent: 2788255 (1957-04-01), Farber
patent: 2880270 (1959-03-01), Hell
patent: 2881246 (1959-04-01), Fairchild
patent: 3022373 (1962-02-01), Levine et al.
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