Grace's Guide To British Industrial History

Registered UK Charity (No. 115342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,531 pages of information and 247,064 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

M. L. Magneto Syndicate

From Graces Guide
1917
1917.
January 1919
November 1919
1920.
January 1920.
1920
January 1920.
January 1920.
November 1922.
June 1923.
August 1923
October 1923.
March 1924
June 1924
June 1924.
September 1927.
February 1928
December 1929.
September 1929.
1929.
1930.
May 1930.

M-L Magneto Syndicate of West Orchard, Coventry. (1929)

1915 Formed by Morris and Lister

1914 Patent with Graham Parmley Thompson on "Improvements in Coil Winding and similar Machines."

1915 The directors of the M-L Magneto Syndicate were David King Morris, George Anslow Lister and E. A. Watson

1919 January. Advert - More than 60,000 magnetos have been supplied to HM Government in past three years.

1919 Became part of Smiths Industries. [1]

1920 Catalogue of magnetos. [2]

1920 June. Article on their Oscillating High-tension Magneto. [3]

1924 Article in Engineering, accompanied by illustrations: 'For mines provided with a compressed-air supply, but not having underground electric supply, a portable, turbine-driven self-contained generator and lamp, illustrated in Figs. 172 to 174, is made by the M.L. Magneto Syndicate, Limited, of Coventry. A short hollow shaft, running on ball bearings in the upper part of the lamp casing, carries on its upper part a ring of turbine blades built into a disc flywheel; to the lower part of this disc is attached a permanent magnet rotor, which revolves within a laminated stator carried in the lower part of the casing by a clamping ring. The magneto-generator is designed to supply alternating current at a practically constant voltage over a wide range of speed. The nozzle is mounted in a branch that projects tangentially from the casing and is fitted with a gauze air-filtering cap. The exhaust passes to the atmosphere through a port at the top of the casing, closed by a spring-loaded disc valve opening outwards. The glass cap covering the lamp bulb is continuous^ scavenged by air received from the lamp casing, and escaping through a hole in the recessed portion of the bottom wall. In order to ensure that the terminals may be dead if the protecting glass should be broken, a cut-out is provided, consisting of a flexible sided metallic chamber, similar to that of an aneroid barometer. The chamber is in connection with the atmosphere, but it is placed at the back of the lamp holder, where it is exposed to the exhaust pressure. The chamber carries a platinum contact, which engages with a fixed contact on the body of the lamp. If the pressures inside and outside the chamber equal, the contacts are pressed together, short-circuiting the generator. Breakage of the glass or tampering with the points will therefore automatically make the lamp dead. An emergency governor is provided on the generator, and operates for an excess speed of 10 per cent. The lamp is of about 32 candle power (24 watts), and the ordinary 12-volt automobile lamp bulb can be used. In the lamp in question, with an air pressure of 100 lb. per square inch, the consumption is stated to be nearly 3 cub. ft. of free air per minute ; the total weight of the lamp is between 14 lb. and 16 lb. Wherever electric lamps are used in coal mines, it is, of course, necessary to retain a small number of oil safety lamps for use as gas detectors.'[4]

1929 Advert for: Anode Converters; Rotary Transformers; Motor Generator Sets for Anode and Filament supply to Power Amplifiers for Radio, Public Address, Gramophone Reproduction, etc.; Synthetic Resin Mouldings in Bakelite; and various other products - of all descriptions. (Wireless Section - Stand No. MM.75) [5]

1930 M. L. Magneto Syndicate Ltd was a lighting, starting and ignition business owned by Smiths. Its sale by Smiths to Joseph Lucas Ltd for the sum of £116,250 was related to a general trading agreement made between Lucas and Smiths "to remove the competition between the two companies in connection with magnetos, lighting and starting."


See Also

Sources of Information

  1. ↑ The Autocar of 4th January 1919 p7
  2. ↑ The Engineer of 6th Feb 1920 p130
  3. ↑ The Engineer of 11th June 1920 p600
  4. ↑ Engineering 1924/10/10
  5. ↑ 1929 British Industries Fair Advert 242 and p109
Retrieved from "https://gracesguide.co.uk/index.php?title=M._L._Magneto_Syndicate&oldid=1395882"
Privacy policy Disclaimers About Grace’s Guide Contact Grace’s Guide

Grace's Guide web site design is Copyright © 2021 by Grace's Guide Ltd. The text of this web site is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. 

MW1.43