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.T. Speedometer Co. Ltd. concerning modifications to make instruments silent.
| Identifier | ExFiles\Box 50\4\ Scan080 | |
| Date | 8th June 1925 | |
| From A.T.SPEEDOMETER CO.LTD. HOB/W 20, Avonmore Road, WEST KENSINGTON London W.14 8th June 1925 Messrs. Rolls-Royce Ltd. Nightingale Road, DERBY "We have very seriously considered this "and have made endless experiments with a view to getting our "instruments absolutely silent and believe we have now succeed- "ed {J. L. Edwards} in our object. "It will be necessary to alter various parts of both "the instruments and the drive, which naturally will increase "the cost and before going further in the matter, we are sub- "mitting you a sample of both instrument and drive and shall "be glad if you will thoroughly examine same and give us your "opinion on its merits or de-merits and after we have your "views we will consider the question of adopting the new drive "as your standard. "You will notice that the sample instrument has been "left attached to the cable and we would like you to note that "to dis-connect same it is first necessary to un-screw the "small Grub Screw on the Brass Bush, this should be done whilst "holding the Outer Flex with one hand to avoid same turning "round with the Union when same is screwed off the instrument. "The Union should then be slipped down the Cable and will then "reveal the Bush and Internal Coupling. This Coupling is "attached to the instrument Spindle by a Split Pin, the legs "of which have been spread out, this Pin should be withdrawn "and the Cable is then dis-connected from the instrument. The "most essential point is, however, that the Union must not be "un-screwed from the instrument with the Grub Screw still "intact." ENCLOSURE No 521 JUSTSO | ||