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 a supplier discussing the manufacturing process and replacement of special rings.
| Identifier | ExFiles\Box 148\3\ scan0295 | |
| Date | 4th January 1938 | |
| MANUFACTURERS OF "HEPOLITE" PRODUCTS ON AIR MINISTRY APPROVED LIST, ON WAR OFFICE, ON ADMIRALTY, CROWN AGENTS HEPWORTH & GRANDAGE LTD PISTONS - PISTON RINGS - GUDGEON PINS - LINERS ST.{Capt. P. R. Strong} JOHN'S WORKS BRADFORD Handwritten: Mths{Reg Matthews} - 1258. Files we should always make a special note on the drawing in future Header right side: H.109 TELEGRAMS AND CABLES: 'RINGS, BRADFORD'. CODE: BENTLEY'S TELEPHONE: 11100 (6 Lines) LONDON SERVICE DEPOT 175-181, GT. PORTLAND ST.{Capt. P. R. Strong} W.1. TELEPHONE: TERMINUS 1418/9 TELEGRAMS: 'VACRIT, NORDO,' LONDON MIDLAND SERVICE DEPOT 120 SNOW HILL, BIRMINGHAM TELEPHONE: CENTRAL 2571/2 TELEGRAMS: HEPLEX, BIRMINGHAM SCOTTISH SERVICE DEPOT 76 MITCHELL STREET, GLASGOW TELEPHONE: CENTRAL 1748/6 TELEGRAMS: HEPOLITE, GLASGOW WESTERN SERVICE DEPOT 27, REDCLIFF STREET, BRISTOL, I. TELEPHONE: 22447/8 TELEGRAMS: HEPO, BRISTOL YOUR REF Rm{William Robotham - Chief Engineer}/Mths.{Reg Matthews}10/MH.{M. Huckerby} OUR REF WH/AB. DATE 4/1/38. Messrs. Rolls-Royce Ltd., DERBY. FOR THE ATTENTION OF MR. MATTHEWS: Dear Mr. Matthews, I thank you for your letter of the 31st.ult., with reference to the special rings which were made to your request. We have to say that the rings were counter-bored before finishing, our operations being as follows:- After counter-boring the rings were closed up in a jig giving the same gap as the finished diameter, lapped on the sides or ground and then finished on the diameter. We did this in order to remove the twist due to the unequal forces exerted by the ring. Apparently, we have destroyed the principle that you were desirous of testing, and in accordance with your letter we have put replacement rings in hand and will finish them in accordance with your instructions, i.e. finish the "L" section after the rings are completely machined. We shall be obliged if you will let us have your covering order for the rings as enumerated in your letter. Assuring you of our best attention, Yours faithfully, Hepworth & Grandage Ltd. WHepworth Joint Managing Director. | ||