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 Limited discussing an LR7T Regulator's thermostatic compensation.
| Identifier | ExFiles\Box 166\2\ img078 | |
| Date | 1st April 1937 | |
| 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. TRADE MARK 6092 "KING OF THE ROAD" LAMPS, HORNS. "CYCLEALITIES" "MOTOR-CYCLEALITIES" "MOTORALITIES" MAGNETOS. BATTERIES. ELECTRIC LIGHTING & STARTING SYSTEMS. Codes: A.B.C. 5th & 6th EDITH & BENTLEY'S 1st & 2nd JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM 19 TELEPHONE: NORTHERN 5201 (12 LINES) TELEGRAMS & CABLES: "LUCAS, BIRMINGHAM" SERVICE DEPOTS BELFAST 3/5 CALVIN STREET, L'DERRY & STRINGER BIRMINGHAM, 15 15, GREAT HAMPTON STREET. BRIGHTON, 4 85, OLD SHOREHAM RD. HOVE. BRISTOL 345, BATH ROAD. CARDIFF 54a, PENARTH ROAD. COVENTRY PRIORY STREET. DUBLIN PORTLAND STREET NORTH, NORTH CIRCULAR ROAD. EDINBURGH, II 50, STEVENSON RD. GORGIE. GLASGOW 227/229 ST GEORGES ROAD. LEEDS 64, ROSEVILLE ROAD. SERVICE DEPOTS LIVERPOOL, 13 450/458, EDGE LANE. LONDON GORSDRECHT ROAD, ACTON VALE, W.3. LONDON 757/769, HIGH ROAD, LEYTON, E.10. LONDON 319, REGENT ST.{Capt. P. R. Strong}, W.I. SHOWROOMS & OFFICES LONDON 155, MERTON ROAD, WIMBLEDON, S.W.19. MANCHESTER, 3 291/293, DEANSGATE. SUPPLY DEPOT MANCHESTER TALBOT RD. STRETFORD. NEWCASTLE-on-TYNE, 2 64/66, ST MARY'S PLACE. WHEN REPLYING PLEASE REFER TO X/LGT/10. 1st.April,1937. Regulation Messrs.Rolls-Royce,Limited, DERBY. For the attention of Mr.West. Experimental Dept. Dear Sirs, With reference to your letter of the 23rd.ultimo, addressed for the attention of our Mr.C.E.Robinson on the subject of LR{Mr Ellor}7T Regulator No: LT.0884, the following is an extract from Mr.C.E.Robinson's report to us,and we thought that even though you had discussed it personally here, you would like to have his remarks on record. "Mr.West discussed the matter raised in his letter when he was at these works on the 24th.March,but it may be desirable to reply in writing. The substance of his letter is correct, one of the main points of thermostatic compensation is that for the first ½ hour or so while the regulator is warming up, the output from the dynamo is increased and that it is the final value of the dynamo output which is the same as that given by a non-temperature compensated regulator. In general we find that the boosting current obtained compared with the earlier form of regulator, is of the order of 5 amps, falling away during the ½ hour to nothing. When Messrs.Rolls-Royce altered the setting of the regulator by approximately 0.5 volt, they achieved the same result when the regulator was cold that the | ||