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 S. Smith & Sons regarding electric lighting equipment and the theory of a dynamo.
| Identifier | ExFiles\Box 3\5\ 05-page032 | |
| Date | 23th January 1918 | |
| ALL COMMUNICATIONS TO BE ADDRESSED TO THE FIRM & NOT TO INDIVDUALS. GOVERNMENT CONTROLLED ESTABLISHMENT. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, INDIA OFFICE, ROYAL AIRCRAFT FACTORY and ROYAL NAVAL FLYING CORPS. FACTORIES: EDGWARE RD., CRICKLEWOOD, N.W. AND GREAT PORTLAND ST Telephones: 6350 MAYFAIR (5 Lines) Telegrams: SPEEDOMET, TELEW, LONDON. 1163 WILLESDEN. SPEEDOPAC, CRICKLE, LONDON. West End Agencies at E.GRAND HOTEL BUILDINGS, W.C. AND 88, PICCADILLY, W. X 295 S. SMITH & SONS (MOTOR ACCESSORIES) LIMITED BRITISH MANUFACTURERS OF SPEEDOMETERS CARBURETTERS DYNAMOS LAMPS PUMPS HORNS AVIATION & MOTOR BOAT SPECIALISTS Branches at SOUTH AFRICA JOHANNESBURG SOUTH AFRICA CAPE TOWN DUTCH EAST INDIES JAVA NEW ZEALAND WELLINGTON AUSTRALIA MELBOURNE, SYDNEY AGENCIES IN ALL CIVILIZED COUNTRIES. BY APPOINTMENT TO H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} KING GEORGE V.{VIENNA} ROYAL WARRANT HOLDERS TO H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} KING OF SPAIN. BY APPOINTMENT TO H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} QUEEN ALEXANDRA ROYAL WARRANT HOLDERS TO PRINCE & PRINCESS CHRISTIAN. HEAD OFFICES, FACTORY & SHOWROOMS, 179-185, Great Portland St.{Capt. P. R. Strong}, LONDON, W.1. YOUR REF. OUR REF. ACL/BOB. Jany 23rd 1918. Messrs. Rolls-Royce Ltd., DERBY. For the attention of Mr E.Fowler Clark. Dear Sirs, With regard to our recent visit to you in connection with our Electric Lighting Equipment, we enclose herewith a description of the theory of the Dynamo which you stated would be of interest to you. It should be noted that in the actual machine we draw current from one auxiliary brush and one main brush. This, however, does not alter the current distribution in the armature winding in any way. It only alters the current in one of the resistances. We have verified this by careful tests. We shall be sending you along one of our Model 3, 12 Volt, 10 ampere dynamos in a few days for you to make your bench tests upon and the rest of the equipment will follow in a short time. We also return herewith the copy of the Model Engineer you so kindly lent us. The article on the Rectifier is most interesting, and we think that a most useful and ingenious device. P.T.O. | ||