Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1979-12-10
1981-09-15
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
73290R, 266 92, 266 94, 414148, G01S 1308
Patent
active
042900670
ABSTRACT:
A non-contacting surface contour measurement device includes movable member which can selectively be actuated to form a hermetic enclosure about a transmit and/or receive antenna. The measurement device, when employed in a blast furnace, need be exposed to the furnace environment only during measuring modes which constitute a small portion of the furnace operating cycle.
REFERENCES:
patent: 3289303 (1966-12-01), Farrell et al.
patent: 3693812 (1972-09-01), Mahr et al.
patent: 3905239 (1975-09-01), Legille
patent: 4044354 (1977-08-01), Bosher et al.
patent: 4044355 (1977-08-01), Edvardsson
patent: 4050592 (1977-09-01), Greaves et al.
patent: 4094494 (1978-06-01), Mahr
patent: 4219814 (1980-08-01), Johnson
Kremer Victor
Legille Edouard
Hubler Malcolm F.
Paul Wurth S.A.
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