Model of Bell's Harmonic Telegraph Transmitter

Model of Bell's Harmonic Telegraph Transmitter

<< >>
Usage conditions apply
Downloads
Description (Brief)
Model of Bell's Harmonic Telegraph Receiver, L-shaped electro-magnet, mounted on wooden base. A flattened steel clock-spring is clamped by one end to one pole of the magnet, while the other is free to vibrate over the other pole. This type of instrument was used by Dr. Bell in conjunction with the harmonic telegraph transmitter, Cat. # 308211, when the telephone was discovered. For details see the "Birth and Babyhood of the Telephone" by Thomas A. Watson.
Location
Currently not on view
Object Name
Telegraph Set
harmonic telegraph
Other Terms
Telegraph Set; Telegraphy; Receiver
Measurements
overall: 3 in x 5 in x 3 in; 7.62 cm x 12.7 cm x 7.62 cm
ID Number
EM.308212
catalog number
308212
accession number
70856
Credit Line
from American Telephone & Telegraph Company
See more items in
Work and Industry: Electricity
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.

Comments

Add a comment about this object