» Manometric Bellow (0503)
Immagini
DESCRIPTION
Exhibit 503 is part of a pressure gauge for a flame which R. Koenig called a capsule and used to represent graphically a human voice. This capsule is composed to two metal hemispheres screwed together with a membrane in the middle between two chambers (see design:1) The flow of the gas which supplies the flame is varied by the movements of the membrane driven by the oscillations from a Helmholtz resonator (exhibit 53) or human voice positioned at the funnel type entrance. The variations of intensity of the flame then reflects the incident sound waves maximum for a node and minimum for an antinode. The rapid flame variations can be visualized with a rotating mirror which projects a luminous strip that oscillates up and down. In the case of using a Helmholtz resonator, the small opening intended for the ear substitutes the voice at the funnel entrance.BIBLIOGRAPHY
- [1] Perucca E.," Fisica Generale e Sperimentale"; Vol. I, UTET Torino, 1937, pag. 499.
- [2] URL [ http://www.phys.cwru.edu/ccpi/Flame_manometer.html ]
- [3] URL [ http://www.physics.uwo.ca/~drm/koenig/fm.htm ]
- [4] URL [ http://physics.kenyon.edu/EarlyApparatus/Acoustics/Manometric/manometric.html ]
Dati Catalografici
| Data di costruzione: | --- |
|---|---|
| Data di carico: | Ignota |
| Nr. Inventario: | Ignoto (Ignoto) |
| Costruttore: | Costruttore sconosciuto |
| Materiale: | metallo, ottone |
| Dimensioni: | Lunghezza complessiva: 14 cm; Altezza complessiva: 6 cm; Diametro della capsula: 4 cm |
| Conservazione: | buono (Lo strumento non è completo: mancano l'imbuto (A) ed il supporto per la capsula.) |