Primax moving iron loudspeaker, 1924-1927

Made:
1924-1927 in Dagenham
maker:
Sterling Telephone and Electric Company Limited
Primax loud speaker (sectioned), c.1924. Three quarter reverse view of whole object on grey background. From a colour Primax loud speaker (sectioned), c.1924. Three quarter reverse view of whole object on light blue background. From a Group photograph of loudspeakers on grey background (l to r):- 1936-423 Frenophone loudspeaker amplifier, 1922;

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Primax loud speaker (sectioned), c.1924. Three quarter reverse view of whole object on grey background. From a colour
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Primax loud speaker (sectioned), c.1924. Three quarter reverse view of whole object on light blue background. From a
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Group photograph of loudspeakers on grey background (l to r):- 1936-423 Frenophone loudspeaker amplifier, 1922;
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:
felt, metal (unknown) and paper (fibre product)
type:
loudspeaker
taxonomy:
  • furnishing and equipment
  • sound device
credit:
Donated by the Marconiphone Company Limited