Diagram of the Lanchester speaker

Diagram of the Lanchester speaker "Sp.Sen" (rolling ring centering)

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Image details

Title	Diagram of the Lanchester speaker
Archive Reference	LAN/2/15/1
Description	Diagram of the Lanchester speaker "Sp.Sen" (rolling ring centering)
Creator	Unknown
Copyright	Unknown
Date of Creation	c.1910
Architect	Basil Slade
Dimensions	N/A
Media	Lantern slide
Keywords