Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1974-11-14
1976-11-30
Tolin, Gerald P.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318282, 318627, 318685, 356 97, 318640, G05B 1928, G01J 342
Patent
active
039952070
ABSTRACT:
A spectrophotometer including a wavelength stepper motor driving a wavelength scanning mechanism and a chart stepper motor driving a chart recorder, both motors being operative in response to driving pulses received from a system clock. The upper limit of a wavelength scan interval is established by manually adjusting the wavelength scanning mechanism to the desired limit. The length of a desired scan interval is selected by the operator and loaded into a counter which decrements in response to the driving pulse input to the wavelength motor. The counter generates an output signal after a predetermined count which clocks a switching circuit for reversing, inhibiting, or otherwise controlling the wavelength and chart motors. Other inputs to the switching circuit provide for either serial or overlay chart recording and for either continuous or manually controlled scanning.
REFERENCES:
patent: 3280399 (1966-10-01), Kreinberg
patent: 3455636 (1969-07-01), Haswell
patent: 3658422 (1972-04-01), Wilkinson
patent: 3663106 (1972-05-01), Minami et al.
patent: 3818261 (1974-06-01), Clarke, Jr.
patent: 3832062 (1974-08-01), Van Den Bosch
patent: 3843259 (1974-10-01), Tohyama et al.
patent: 3868557 (1975-02-01), Scott, Jr.
Beckman Instruments Inc.
Feldhaus John J.
Meads R. R.
Steinmeyer R. J.
Tolin Gerald P.
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