Apparatus diagrams for a light actuated microphone and a pick up for a gramophone

Date:
Jul-Aug 1928
Reference:
PP/NHE/A/4/12/1
Part of:
Heatley, Norman George, OBE (1911- 2004)
  • Archives and manuscripts

About this work

Description

Coloured line drawings, initialled and dated by 'NGH' (Heatley), of a pick-up for gramophone and a light-actuated microphone (with manuscript notes at the bottom by Heatley).

Publication/Creation

Jul-Aug 1928

Physical description

1 file

Where to find it

  • LocationStatusAccess
    Closed stores

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