Wave transmission lines and networks – Coupling networks – With impedance matching
Patent
1977-08-24
1978-10-31
Vertiz, O. R.
Wave transmission lines and networks
Coupling networks
With impedance matching
106 53, H03H 730, C03C 310, C03C 304
Patent
active
041237315
ABSTRACT:
A glass suitable for use in ultrasonic delay lines which comprises the components by weight, SiO.sub.2 42 to 27%, PbO 71 to 52% and preferably contains K.sub.2 O and/or Na.sub.2 O. The glass further contains PbF.sub.2, BaF.sub.2, KHF.sub.2, K.sub.2 SiF.sub.6, Na.sub.2 SiF.sub.6, ZnO, CdO, BaO, SrO, ZrO.sub.2, TiO.sub.2, La.sub.2 O.sub.3, Al.sub.2 O.sub.3, B.sub.2 O.sub.3, Sb.sub.2 O.sub.3 and As.sub.2 O.sub.3.
This invention is characterized by a low rate of shear wave propagation (V) in the glass. The delay line can be used for a dropout compensator circuit of Video Tape Recorder or Video Disk Players.
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patent: 3303399 (1967-02-01), Hoogendoorn et al.
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patent: 4029897 (1977-06-01), Mayer
Kanbara Tohru
Uemura Michihiko
Yokoo Nobuhiro
Asahi Glass Company Ltd.
Bell Mark
Vertiz O. R.
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