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 Ferodo Limited regarding the heat treatment and trial of clutch discs.
| Identifier | ExFiles\Box 141\3\ scan0257 | |
| Date | 16th February 1934 | |
| All Communications to be addressed to the Company. FERODO LIMITED TELEPHONE: 19 CHAPEL-EN-LE-FRITH (4 LINES) TELEGRAMS: FRICTION, PHONE, CHAPEL-EN-LE-FRITH. FERODO RECD. TRADE MARK BRAKE & CLUTCH LININGS CHAPEL-EN-LE-FRITH, VIA STOCKPORT, ENGLAND. CODES: WESTERN UNION FIVE LETTER EDITION, BENTLEYS COMPLETE & 2ND PHRASE, MARCONI INTERNATIONAL, LIEBER'S CODE, LIEBER'S LATEST CODE, A.B.C. 5TH & 6TH EDITIONS. Depots:- LONDON 222, TOTTENHAM COURT RD W. 1. ABERDEEN 26, GUILD STREET. BELFAST 8, 10 & 12, MONTGOMERY ST BIRMINGHAM 202, CORPORATION ST BRIGHTON 84, QUEENS ROAD. BRISTOL 19, PARK STREET. CARDIFF 39, CHARLES. ST DUBLIN 120, UPPER ABBEY ST GLASGOW 70, WATERLOO ST LEEDS 25, HUNSLET RD LIVERPOOL 1-3, BERRY STREET. MANCHESTER CATHEDRAL ST NEWCASTLE-ON-TYNE WORSWICK CHAMBERS, 10, WORSWICK ST OFF PILGRIM ST X719 February 16th 1934 YOUR REF. OUR REF. FJF/WAC. Messrs. Rolls Royce Ltd., DERBY. For the attention of Mr. Grylls. Dear Sirs, Heat Treatment of Clutch Discs. We are very much obliged indeed for the information you have kindly given us in your letter of the 13th instant - for this earlier acknowledgment would have been made but for the fact that the present writer was away on business in the West of England until yesterday morning. Referring to heat treating of clutch discs, it is obvious that very elevated temperatures must have a detrimental effect on the life of the material, since partial distillation of certain ingredients that are used to impart durability takes place. Appreciating this fact, we have approached the problem from another direction and are now pre-treating the impregnant to eliminate one of the volatiles which will, in our opinion, effect precisely the same purpose as heat treatment after manufacture without any appreciable loss of durability. As Mr. Longley informed Mr. Grylls this morning, we are sending you a pair of clutch discs prepared in the manner indicated and we hope you will be able to give them a trial as soon as possible. We should be very much interested to know the result as we think that a substantial improvement will be effected. Yours faithfully, FERODO LIMITED. CHIEF ENGINEER. | ||