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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).
Letter from S. Smith & Sons responding to an unsatisfactory report regarding a Jackall System fitted to a chassis.

Identifier  ExFiles\Box 139\2\  scan0348
Date  8th October 1935
  
105
Bowering X1166
CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY
BY APPOINTMENT TO HIS MAJESTY THE KING
ENGINEERING AND ALLIED EMPLOYERS NATIONAL FEDERATION 1896
TELEPHONE: GLADSTONE 3333 (20 LINES)
TELEGRAMS: SPEEDOFAC, PHONE, LONDON.
CABLES: SPEEDOFAC, LONDON.
CODES: MARCONI, COMMERCIAL, BENTLEY'S.
S.Smith & Sons (Motor Accessories) Ltd
BRANCHES AT PARIS MILAN SYDNEY WELLINGTON
AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES
SHOWROOMS & DEPOTS 179-185, GT PORTLAND ST LONDON W.1
26-33, COX ST LIVERY ST, BIRMINGHAM
14c JACKSONS ROW DEANSGATE MANCHESTER
21, DRURY STREET GLASGOW
DUBLIN & BELFAST
CRICKLEWOOD WORKS LONDON, N.W.2.
Please quote our reference: S.1.
SALES DIRECTOR'S OFFICE.
8th October 1935.
Messrs.Rolls Royce Ld,
DERBY.
Attention of Mr.Robotham.
file
Dear Sirs,
JACKALL SYSTEM FITTED TO CHASSIS 21-G-IV.
I beg to acknowledge receipt of yours dated the 4th October, Ref: Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}19/KW. It so happens that your letter reached me at the same time as our Engineers' report following a most careful investigation of the jacks and parts which were brought back by our Fitting Manager, Mr.Bailey, after his visit to your Works.
In view of your experience I am not at all surprised at the sentiments expressed in your letter and, frankly, when I first interviewed Mr.Bailey upon his return from Derby I was very concerned as never in the history of Jackall have we received such an unsatisfactory report.
The matter, however, is thoroughly explained after dismantling the four jacks and the control box as all the rubber parts are so very badly swollen and distorted due to the use of a mineral oil - which would account for the failure of the various components to function in their respective capacity. I would observe that the jack rubber bucket washers are not so badly distorted as the actual rubber distributor valve, in fact, one of the jack washers appears to be normal and, on test, this particular jack showed no signs of leakage.
(Continued)...
  
  


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