Resumen

Illustration Description

Figure 2607 -- Duddell Moving Coil Oscilliograph

General view of electromagnet form of Duddell moving-coil oscillograph, showing the oil bath, and electromagnet.

This instrument is specially designed to have a very high natural period of vibration (about 1 / 10,000 of a second) so as to be suitable for accurate research work. It is quite accurate for frequencies up to 300 Hz.

In the figure:

• A is the brass oil bath in which two vibrators are fixed
• B, core of electromagnet which is excited by two coils
• C, one of the two coils
• D, two pairs of terminals for connecting the two coils
• E, bolts that hold the oil bath in position between the poles of the magnet
• F, two of three leveling screens (one is hidden behind the oil bath)
• G, terminals of one vibrator
• H, fuse
• K, thermometer with bulb in center of oil bath

Public Domain Source

• Hawkins Electrical Guide, Volume 6
• Chapter 63: Wave Form Measurement
• Page 1858, Figure 2607
• Copyright 1917 by Theo. Audel & Co.
• Printed in the United States

Upload Notes

• Scanned by User:DMahalko, Dale Mahalko, Gilman, WI, USA -- Email: dmahalko@gmail.com
• Scanned at 600dpi, 8-bit grayscale
• Level-adjusted and cleaned up

See Also

For a list of all these illustrations used in Wikipedia please see the article Hawkins Electric Guide on the English Wikipedia.

Licencia

	Este archivo está en el dominio público en los Estados Unidos. Esto se aplica a los trabajos de Estados Unidos donde los derechos de autor han expirado, a menudo porque su primera publicación ocurrió antes del 1 de enero de 1929. Véase esta página para explicación adicional.
	Esta imagen puede estar protegida fuera de los Estados Unidos —especialmente en Canadá, China (excepto Hong-Kong, Macao, o el área de Taiwán), Alemania o Suiza—. El creador y el año de publicación son información esencial y deben ser proporcionados. Véase Wikipedia:Derechos de autor para más detalles.