Thermographic stylus with inherent pressure control

Details Thermographic stylus with inherent pressure control Thermographic stylus with inherent pressure control

1976-03-15

1977-04-05

Miller, Jr., George H.

Recorders

Markers and/or driving means therefor

Stylus feature

346 76R, 219233, G01D 1516, G01D 1510, H05B 100

Patent

active

040165728

ABSTRACT:
A thermographic stylus apparatus includes a bimetal spring element in the pen arm and a resistive heating means. The pressure exerted by the scribing element on the writing platen is varied in linear proportion to the total power consumed in the resistive heating means which causes bending or at least a tendency to bend in the bimetal.

REFERENCES:
patent: 2358102 (1944-09-01), Robertson
patent: 2489062 (1949-11-01), Thompson
patent: 3312980 (1967-04-01), Erbach
patent: 3653069 (1972-03-01), Baring
patent: 3689937 (1972-09-01), Phillips et al.
patent: 3907090 (1975-09-01), Northfield et al.

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