Primax moving iron loudspeaker, 1924-1927
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LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
License
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Primax loud speaker (sectioned), made by the Sterling Telephone and Electric Company Limited, Dagenham, London, England, 1924-1927
The main feature of this loudspeaker is its pleated diaphragm. This was introduced by Lumiere in 1908. The moving-iron unit that drives the paper diaphragm has been sectioned to show its workings in great detail.
Details
- Category:
- Radio Communication
- Object Number:
- 1927-113
- Materials:
- metal (unknown), paper (fibre product) and felt
- Measurements:
-
overall: 410 mm x 410 mm x 120 mm, 2.507 kg
- type:
- loudspeaker
- credit:
- Donated by the Marconiphone Company Limited
