BTH 'Rica Kellogg' loudspeaker, c 1929.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

BTH 'Rica Kellogg' loudspeaker, c 1929.

© Science Museum / Science & Society Picture Library

Description

BTH 'Rica Kellogg' 12-inch energised moving-coil loudspeaker with integral rectifier unit. This was marketed as an 'American hornles' loudspeaker and was developed by Chester W Rice and Edward W Kellog at the research laboratory of the General Electric Company, for the Radio Corporation of America. It employs a moving coil suspended between the poles of a magnet and a paper cone diaphragm.
 

Image Ref.

10251348
 

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