Letter from Cantilever Constructions offering their toggle jack designs for cars.
| Identifier | ExFiles\Box 26\3\ Scan159 | |
| Date | 24th October 1932 | |
| COPY. CANTILEVER CONSTRUCTIONS, 8-9, Essex Street, Strand, LONDON, W.C.2 Messrs. Rolls Royce, Ltd., Conduit Street, W.1. 24th October, 1932. Dear Sirs, For the attention of Colonel Fell. We understand that you are now contemplating supplying fixed jacks of the toggle type with your cars, and as the oldest firm manufacturing such jacks we should like to have the opportunity of submitting our designs to you. We may say that as long ago as 1923 we submitted a portable jack of the type to Mr. Hidgreaves, which was apparently quite satisfactory under test, but the time was, we understood, not then ripe for a change. We still have this identical jack, but we have since produced other designs (of similar type), one of which would be likely to meet your requirements, either in the fixed or portable form. We have been specializing in toggle jack design since 1919 - (thirteen years longer than any other firm) and our experience has therefore been extensive, and, we suggest may be useful to you. We actually introduced fixed jacks in 1915, but the car manufacturers then objected to them purely on the score of unsprung weight, although those jacks weighed only 10 lb. each. We consider our designs cover the whole field of practical application, which necessarily limits competition. As specialists we were requested to design the special jacks on this system which are now standard equipment on all Aircraft Carriers. These are used for loading torpedoes into aeroplanes and give a lift from 11" to 3 ft in 2 1/2 minutes and are foolproof. The jack of which we enclose particulars has been used for racing purposes for some years with the greatest success by Mr. G. {Mr Griffiths - Chief Accountant / Mr Gnapp} E. {Mr Elliott - Chief Engineer} T. Eyston, Sir Malcolm Campbell, the Lea Francis Co., Alfa Romeo, Aston Martin, etc., and has never failed its users. We have also supplied this jack over a number of years, which we are aware has given every satisfaction with the heavier cars such as Rolls Royce, Daimler, etc. | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).