Recording chart lock

Details Recording chart lock Recording chart lock

1976-07-01

1977-07-26

Miller, Jr., George H.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 33A, 346136, 226 49, 226136, G01D 900, G01D 1524, B65H 1726

Patent

active

040386643

ABSTRACT:
In a measuring instrument such as a spectrophotometer which is driven under the control of a dedicated microcomputer and has a provision for wavelength scan, a flow chart lock system is obtained by storing in the random access memory of the microcomputer an indication of the actual chart position between two sprockets on the chart drive. With this information and stored data regarding the position of the scanning apparatus of the instrument, accurate repositioning of the chart to accurately reflect the scanning position even after scale changes or different modes of operation have occurred is accomplished.

REFERENCES:
patent: 2907997 (1959-10-01), Corwin et al.
patent: 3396403 (1968-08-01), Ford et al.
patent: 3563656 (1971-02-01), Helms
patent: 3844461 (1974-10-01), Robison et al.
patent: 3887122 (1975-06-01), Sommeria
patent: 3942893 (1976-04-01), Bala
patent: 3948425 (1976-05-01), Way
patent: 3976378 (1976-08-01), Pratt

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