| 摘要 |
369,198. Inductive signalling. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Signal-Funk Ges. ; 2, III Hagen, Essen, Germany.) Nov. 5, 1930, No. 33298. Drawings to Specification. [Class 40 (v).] Communication is effected between a stationary and a movable station, by the radiation of waves of speech frequency from an open oscillatory circuit and reception by a further open oscillatory circuit. The two circuits may comprise aerials arranged parallel to one another. A valve amplifier may be interposed between the microphone and aerial or aerial and telephone instrument and a combined transmitter and receiver may be provided with switching to enable the amplifier to be used for either purpose. Specification 154,537, [Class 40 (v), Wireless signalling &c.], is referred to. Reference has been directed by the Comptroller to Specification 223,630, [Class 40 (v), Wireless signalling &c.]. |
