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 regarding the failure of special experimental high frequency 48 watt Bentley headlamp bulbs.
| Identifier | ExFiles\Box 61a\2\ scan0209 | |
| Date | 22th January 1934 | |
| HEAD OFFICES & WORKS: GREAT KING ST.{Capt. P. R. Strong}, BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM 19 TELEPHONE: NORTHERN 5201 (12 LINES) TELEGRAMS & CABLES: 'LUCAS, BIRMINGHAM.' 'KING OF THE ROAD' LAMPS, HORNS, 'CYCLEALITIES' 'MOTOR-CYCLEALITIES', 'MOTORALITIES' MAGNETOS, BATTERIES, ELECTRIC LIGHTING & STARTING SYSTEMS. Codes: A.B.C. 5th & 6th EDITS & BENTLEY'S 1st & 2nd. SERVICE DEPOTS BELFAST 3/5, CALVIN STREET, MOUNT POTTINGER. BIRMINGHAM, 18 GREAT HAMPTON STREET. BRIGHTON OLD SHOREHAM RD HOVE. BRISTOL 345, BATH ROAD. CARDIFF 54a, PENARTH ROAD. COVENTRY PRIORY STREET. DUBLIN PORTLAND STREET NORTH, NORTH CIRCULAR ROAD. EDINBURGH, 11 32, STEVENSON RD, GORGIE. GLASGOW 227/229, ST.{Capt. P. R. Strong} GEORGE'S ROAD. LEEDS 64, ROSEVILLE ROAD. LIVERPOOL, 13 450/456, EDGE LANE. LONDON DORDRECHT ROAD, ACTON VALE, W.3. LONDON 759, HIGH ROAD, LEYTON, E.10 LONDON 319, REGENT ST.{Capt. P. R. Strong}, W.1. SHOWROOMS & OFFICES LONDON 155, MERTON ROAD, WANDSWORTH, S.W.18. MANCHESTER 291/293, DEANSGATE, SUPPLY DEPOT. MANCHESTER TALBOT RD STRETFORD. NEWCASTLE-on-TYNE, 2 84/86, ST.{Capt. P. R. Strong} MARY'S PLACE. WHEN REPLYING PLEASE REFER TO RLN/EH. Handwritten: 86116. Messrs. Rolls-Royce Ltd., DERBY. 22nd January. 1934. Dear Sirs, For the attention of Mr. West. We have your letter of the 20th January in regard to the failure of the High Frequency 48 watt Bulbs fitted to the special experimental Bentley Headlamps. We should be very glad of some further details of this trouble and the knowledge of the approximate number of hours burned and whether they failed together or separately, would be very helpful. As you are aware, these Bulbs are still in the experimental stage and we are watching the rating very carefully. Actually, we have had four pairs on Works Cars for the last three or four weeks without failure and you may rest assured that we shall keep a very careful watch on the first production batch we receive from the makers. The Bulbs you had were got through very rapidly and this may be the reason for their early failure. We are sending you under separate cover, a further half dozen Bulbs from a more recent delivery and it will be very helpful if you could put them on Works Cars and let us have your report. We have no exact data yet on the probable life of these Bulbs in Service and while it is bound to be considerably less than that of the standard bulbs, we imagine they will Cont'd.............. | ||