Apparatus for regulating a parameter by admitting an additive in

Details Apparatus for regulating a parameter by admitting an additive in Apparatus for regulating a parameter by admitting an additive in

1983-06-02

1986-01-28

Smith, Jerry

Boots, shoes, and leggings

364509, 318600, 318603, 318609, 73 611R, G05B 1502, G05B 1929, G01N 1500

Patent

active

045675597

ABSTRACT:
An apparatus for regulating a parameter by admission of an additive into a medium comprises a control pulse generator which is dependent on the extent of deviation from the norm, and a regulating element which effects the admission of additive during the interval of generation of a control signal. The control signal generator comprises a first timing pulse generator with a constant frequency and a first counter which receives the first timing pulses from the first timing pulse generator and transmits a first counter overflow signal after receiving a predetermined number of first timing pulses. The control signal generator further comprises a second timing pulse generator whose frequency increases with decreasing deviation form the norm and which transmits second timing pulses to a second counter which transmits a second counter overflow signal after receiving a predetermined number of second timing pulses. Still further, the control signal generator comprises a circuit which interlinks the first and second counter overflow signals in such a way that the first counter determines the duration of the periods and the second counter determines the width of the control signals.

REFERENCES:
patent: 3189805 (1965-06-01), Poepsel et al.
patent: 3439336 (1969-04-01), Toifl et al.
patent: 3745560 (1973-07-01), Tripp
patent: 3836833 (1974-09-01), Harris et al.
patent: 3914581 (1975-10-01), Gilson
patent: 4203061 (1980-05-01), Minakuchi
patent: 4366534 (1982-12-01), Kompelein
patent: 4371940 (1983-02-01), Yamaki et al.
patent: 4417312 (1983-11-01), Cronin et al.

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