» Schweigger Astatic Galvanometer (0353)
Immagini
DESCRIPTION
Exhibit 353 is a Schweigger galvanometer in which the current carrying coil has two windings which can be combined or used separately to create a magnetic field which causes two needles to twist a support wire and reach an equilibrium position. The two needles are in an astatic configuration: one N-S needle inside the coil and the S-N needle outside the coil which is subject to the return field. In this case the astatic configuration implies that there is no net effect of the earth's field and there is no need to align the instrument with the magnetic meridian or know the strength of the earth's magnetic field. The instrument is protected by a bell jar which fits into a circular furrow on the base which has three adjustable screws for leveling.BIBLIOGRAPHY
- [1] Privat - Dessschanel, "Trattato elementare di Fisica", Milano, Fratelli Dumolard, 1882. §548, pag. 546
Dati Catalografici
| Data di costruzione: | --- |
|---|---|
| Data di carico: | 1835-05-25 |
| Nr. Inventario: | 949 (Generale dal 1874) 383 (Antico inv. Gabinetto Fis) |
| Costruttore: | Costruttore sconosciuto |
| Materiale: | vetro, legno, ottone, metallo |
| Dimensioni: | Diametro base legno: 21 cm; altezza asta metallica:34 cm; altezza campana di vetro: 40 cm; diametro campana: 18 cm Altezza complessiva: 43 cm |
| Conservazione: | buono (Il filo di sospensione è rotto.) |