Filings coherer, Lodge-Muirhead system, patented 1

Science Museum Group
© The Board of Trustees of the Science Musuem

Filings coherer, Lodge-Muirhead system, patented 1901, with arrangement for adjusting the compression of filings by using an external magnet to turn the head of a screw inside the tube. Adjustment washer inside the tube marked in handwriting ‘Dec 31 1902’.

Details

Category:
Radio Communication
Identifier:
1923-442
credit:
Northampton Polytechnic Institute