Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,478 pages of information and 233,901 images on early companies, their products and the people who designed and built them.

Cambridge and Paul Instrument Co

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January 1920. Pyrometers.
1922. Fery Pyrometer
1922. Fery Pyrometer
1922. Fery Pyrometer
1922. Fery Pyrometer

of Cambridge and Muswell Hill, London

1920 Cambridge Scientific Instrument Co took over R. W. Paul Instrument Co to form Cambridge and Paul Instrument Co

1920 Jan. Physical and Optical Societies Exhibition. Exhibitor of electrical instruments.

1920 September. Exhibited at the Machine Tool and Engineering Exhibition at Olympia with CO2 recorders

1921 Supplied a recorder to J. and A. D. Grimond to monitor the reliability of 50 textile looms in their mills[1]

1922 The 'Collins Micro-Indicator for High Speed Engines' was patented in 1922 by W. G. Collins, director of the Cambridge & Paul Instrument Co. A very small piston moved a stylus to engrave diagrams on a small celluloid disc. An solenoid acted to press the stylus against the disc. The diagrams were only about 3mm long, with a maximum height of about 2.5mm, so a magnified image was projected onto a screen using a projector in a readily portable case. [2].

1924 Change of name to Cambridge Instrument Co when it became a public limited company status.

See Also


Sources of Information

  1. The Engineer 1921
  2. [1] External-spring type indicators. See last page