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 Joseph Lucas Ltd. explaining the cause of a fractured guide spring on a type HF.43 Alto Horn due to an incorrectly assembled washer.
| Identifier | ExFiles\Box 59\3\ Scan120 | |
| Date | 1st July 1931 | |
| X 6032 REGISTERED OFFICES & GENERAL DEPTS GREAT KING STREET, BIRMINGHAM LONDON OFFICE & SHOWROOMS 224, SHAFTESBURY AVENUE, W. C. 2. LUCAS 'KING OF THE ROAD' LAMPS LUCAS STARTING & LIGHTING EQUIPMENT FOR CARS, LUCAS LIGHTING EQUIPMENT FOR MOTOR CYCLES, LUCAS MAGNETOS, LUCAS BATTERIES JOSEPH LUCAS LIMITED ELECTRICAL DEPARTMENT WELL STREET BIRMINGHAM TELEPHONE: NORTHERN 5201 (12 LINES). TELEGRAMS & CABLES: 'LUCAS, BIRMINGHAM.' SERVICE DEPÔTS BELFAST 3/5, CALVIN STREET, MOUNT POTTINGER. BIRMINGHAM GREAT HAMPTON STREET. BRIGHTON OLD SHOREHAM RD., HOVE. BRISTOL 345, BATH ROAD. CARDIFF 54 A, PENARTH ROAD. COVENTRY PRIORY STREET. DUBLIN PORTLAND STREET NORTH, NORTH CIRCULAR ROAD. EDINBURGH 32, STEVENSON RD, GORGIE. GLASGOW 227/229, ST.{Capt. P. R. Strong} GEORGE'S ROAD. LEEDS 64, ROSEVILLE ROAD. SERVICE DEPÔTS LIVERPOOL 450/456, EDGE LANE. LONDON DORDRECHT ROAD, ACTON VALE, W.3. LONDON 759, HIGH ROAD, LEYTON, E.10. LONDON 224, SHAFTESBURY AVENUE, W.C.2. LONDON 155, MERTON ROAD, WANDSWORTH, S.W.18. MANCHESTER 291/293, DEANSGATE. MANCHESTER TALBOT RD, STRETFORD. NEWCASTLE-ON-TYNE 64/66, ST MARY'S PLACE. WHEN REPLYING PLEASE REFER TO [STAMP: RECEIVED 2 JUL 31] Messrs. Rolls-Royce, Limited., DERBY. X/R3 1st, July, 1931. Dear Sirs, Your reference.....HS{Lord Ernest Hives - Chair}/HEW3/AD. With further reference to the type HF.{H. W. Frost - Coachwork Inspector}43 Alto Horn you returned to us recently. As you say the guide spring had fractured and actually the cause of this was that the centre clamping washer had been assembled with the wrong side adjacent to the spring. This washer is radiused on one side and this should obviously have been assembled next to the spring as of course the side with the edge left with a burr from the press is likely to set up a stress in the spring. We found out some time ago that while the importance of this was appreciated by the works, an isolated one or two had slipped through the inspection with the washer wrongly assembled. We are having the horn overhauled and returned to you. It is most unfortunate that this should have occurred on the sample horn you had for test but the foregoing is the explanation for the fracture having occurred. Yours faithfully, JOSEPH LUCAS LIMITED. ELECTRICAL DEPARTMENT. S. Morreford | ||