Apparatus for measuring and controlling the level of molten stee

Details Apparatus for measuring and controlling the level of molten stee Apparatus for measuring and controlling the level of molten stee

1977-11-15

1979-11-27

Baldwin, Robert D.

Metal founding

Control means responsive to or actuated by means sensing or...

Control of feed material enroute to shaping area

164 4, B22D 1116, B22D 102

Patent

active

041756126

ABSTRACT:
An apparatus for controlling the level of liquid steel in a continuous-casting mold wherein the position of the molten steel level within the mold is detected by a coil juxtaposed therewith and forming part of a resonant circuit controlling an oscillator. The capacitor portion of this resonant circuit is formed at least in part by a coaxial cable connecting the coil to the balance of the oscillator circuit. The output frequency of the oscillator is combined with the signal of a reference oscillator in a modulator, the low-frequency passband of this signal is then transformed into an analog voltage proportional to frequency and is used to control a servomotor which regulates the feed of molten metal to the mold.

REFERENCES:
patent: 2671275 (1954-03-01), Burns, Jr.
patent: 3152303 (1964-10-01), Lary et al.
patent: 3217204 (1965-11-01), Nance
patent: 3519060 (1970-07-01), Vischulis
patent: 3838727 (1974-10-01), Levi et al.
patent: 3997835 (1976-12-01), Ando et al.
patent: 4027233 (1977-05-01), Shmakov et al.
patent: 4030027 (1977-06-01), Yamada et al.

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