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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 a supplier regarding the despatch of an experimental 2-speed jack handle for testing and proposed production improvements.

Identifier  ExFiles\Box 26\3\  Scan276
Date  16th November 1933
  
X3117

DONALD SESSIONS & COMPANY LTD.
906. HARROW ROAD, WILLESDEN, LONDON. N.W. 10.

CHAIRMAN
R.{Sir Henry Royce} C. STEVENS
DIRECTORS
DONALD SESSIONS
WILFRED SESSIONS
WALTER SESSIONS
CECIL WILLIAMS

TELEPHONE
WILLESDEN 1270
TELEGRAMS
"TOGGLE, HARLES"
CABLEGRAMS
"TOGGLE, LONDON"

16th November, 1933.

Messrs. Rolls-Royce Ltd.,
D E R B Y.

For the attention of H.{Arthur M. Hanbury - Head Complaints} Lidsey, Esq.

Dear Sirs,

We have today despatched to you, the experimental 2-speed handle which you required for further test.

There is of course, only one handle in existence at the moment, but we have lengthened the tubular hand-grip in accordance with your wishes.

The only difference between this handle and the one we propose to put into production, on receiving your instructions, is in the matter of the gear-box. The existing gear-box is made from L.8 Alloy which will be changed to the special R.R. Alloy recommended by your goodself and the design of the box itself will be considerably neater.

The gears fitted to the existing handle, are approximately 2:1 and 6:1, but we propose making these 2:1 and 9:1, giving a wider ratio and at the same time keeping the actual loaded lift the same as at present, when using a quicker pitch screw on the Jack itself.

We shall be glad to know at your earliest opportunity, if we may put this handle into production for you, as we consider it is a vast improvement on the single-speed handle used hitherto and the extra cost is not excessive.

We shall forward in the course of the next few days, for your approval, a Jack which has been modified in respect of the thread and ball race thrust collar and which is fitted with double safety clips which absolutely ensure that the Jacks cannot work down, even if they are not properly closed.

Assuring you of our best attention,

We are,

Yours faithfully,
For DONALD SESSIONS & COMPANY LIMITED.

Donald Sessions.
Managing Director

DS/IKB
  
  


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