20 AUGUST 1927, Page 27

The need for accuracy in spark control has greatly increased

during the past few years, since the introduction of the high-speed engine. To meet this requirement the British Thomson-Houston Company, of Coventry, are marketing an attachment which fulfils automatically the duty of the usual ignition lever. The main feature of the system is the fact that the spark is as intensive in the fully retarded position as it is in the fully advanced position, as the relationship between the magneto and the engine is altered.