The factory was then turned over to war production, producing lorries and other vehicles. At this time the Royal Aicraft Factory at Farnborough lost its monopoly of design and production of aero engines and in Coventry Siddeley Deasy along with Humber, Daimler and Standard became aero engine producers. Siddeley acquired three of Farnborough's top men to help set up and run the operation.
During the war the work force increased in size enormously from 500 employees to 5,000 by November 1918. The area of the works increased to over 25 acres to accommodate the enormous aero engine production required.
At the end of the war in 1918 negotiations were opened with the Sir WG Armstrong Whitworth company of Newcastle-on-Tyne with a view to merging their two enterprises, this resulted in the formation of Sir WG Armstrong Whitworth Development company in mid 1919, later that year on the 1st November three announcements were made.
The first was that the Sir WG Armstrong Whitworth & Co Ltd had acquired a controlling interest in the Siddeley Deasy Motor Car Co Ltd and amalgamated it with the Armstrong Whitworth Motor Car Department at Parkside, then to be known as Armstrong Siddeley Motors Ltd.
The second that they would then manufacture The Armstrong Siddeley car as well as continuing aero engine production.
The third was the announcement of the Armstrong Siddeley 6-cylinder car of 29.5 hp. so starting a new era.
The cars attracted a notable clientele, including the Duke of York who later became George VI, and Sir Malcolm Campbell who had a Siddeley Special Six in the 30's.
Business boomed and ASM built a number of armoured car prototypes in the 1920's which brought JDS into contact with Major Walter Wilson designer of the epicyclic transmission used in many military fighting vehicles. He had designed a compact form suitable for replacing the traditional crash gear box used in motor cars of the day.
JDS, realising that this would make it easier for people to operate by a single press of the pedal rather than having to double de-clutch, took over the Vauxhall trial installation, testing being undertaken at ASM Cricklewood.
It is possible that he may have been considering buying the ailing Vauxhall company, but General Motors beat him to it. GM laid claim to Wilson's patents, and it took five years to defeat them.
When that happened Wilson & JDS set up Improved Gears Ltd in December 1928. They set up a development and manufacturing facility at Parkside, the company later became Self -Changing Gears Ltd.
It is more commonly known as the Wilson pre-selective gear box, this was fitted to AS cars right up to the middle 50's with various refinements, the early ones had no clutch as such, only the brake bands which were used to engage the gears. A centrifugal clutch was introduced in the middle 30's, this enabled the driver to stop at a halt sign or traffic lights without having to disengage gear. The Daimler car company fitted them as well but used a fluid fly wheel for the same purpose. The Wilson box was the forerunner of today's Automatic gear boxes.
The restored A/S Boardroom at the Heritage Trust
In 1926 when he was at last elected to the board of the parent company, he discovered that it was in a most unsatisfactory financial state. Whereupon at the first and only board meeting he attended, having previously gone to see his bank manager, he offered to buy his portion of the company which the Board accepted. The sum involved was a personal unsecured loan of £1,500,000.00.
So then he regained full control of a growing industrial empire, which included the acquisition in 1928 of the A V Roe Aircraft Company, this has a special significance for me as his godson Jim Kay of Lancashire was employed by A V Roe. His brother Derek was known in the family as UDK.
There are a few more very short chapters in his life before retirement. There was the development of the Railcar before the War, which was seen in and around Coventry in 1936. The company also developed a flickerless cinema projector, but there appears to be no trace of this now. John and Mabel ended their days in 1953.