Wave transmission lines and networks – Coupling networks – Delay lines including elastic bulk wave propagation means
Patent
1979-04-12
1981-04-28
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Delay lines including elastic bulk wave propagation means
84 125, H03H 930
Patent
active
042648831
ABSTRACT:
In a device for annexing a reverberation sound similar to natural reverberation in the course of sound recording, an elastic raw material such as a leaf spring is bent into a bridge element of any shape such as a stanchion ( ), or M-shape provided with a pair of rising foot portions. The bridge element is interposed in an intermediate portion of a coiled spring which is spanned between a drive-transducer and a pickup-transducer. Vibration which is applied along the helical direction of the coiled spring is transmitted, and at the same time the compressive movement of the coiled spring induced by said vibration is absorbed by means of spring action of the bridge element, thereby flutter modulation caused by the compressive movement of the coiled spring can be prevented. Moreover, irregular bending of any portion of the bridge element in front or rear direction can prevent induction of resonance in the audio frequency range.
REFERENCES:
patent: 3106610 (1963-10-01), Young
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