Title: Apparatus for measuring and controlling the level of molten steel in a continuous-casting mold

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Baumert, Jean (Esch, LU)

Application Number: 851635
Filing Date: 1977-11-15
Publication_date: 1979-11-27
Assignee: ARBED Acieries Reunies de Burbach-Eich-Dudelange S.A. (Luxembourg, LU)
Primary Class(es): 164/449.1 164/450.5, 164/453, 164/488
Other Classes:
US Patent Ref:

2671275	Mar, 1954	Burn, Jr.	324/247.
3152303	Oct, 1964	Lary et al.	324/204.
3217204	Nov, 1965	Nance	324/236.
3519060	Jul, 1970	Vischulis	164/449.
3838727	Oct, 1974	Levi et al.	164/4.
3997835	Dec, 1976	Ando et al.	324/207.
4027233	May, 1977	Shmakov et al.	324/204.
4030027	Jun, 1977	Yamada et al.	324/207.

Other Refs: 834783

May, 1960	GB

Primary Examiner: Baldwin, Robert D.
Assistant Examiner: Lin, K. Y.
Attorney: Ross; Karl F.