He also held a number of business directorships with companies such as Blackburn and General Aircraft, Hanworth Securities Ltd, Scophony Ltd and was a partner with merchant bankers O.T. Falk and Partners, and stockbrokers Buckmaster & Moore.
A light modulator developed by J.H. Jeffree in 1934 and known as the Jeffree cell, a cell filled with a transparent fluid which used mechanical oscillations to modulate the light beam passing through it.
Scophony |