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).
List of modifications and improvements for various vehicle components including bushes, bearings, and drives.
| Identifier | WestWitteringFiles\M\October1924-December1924\ Scan44 | |
| Date | 18th December 1934 | |
| (2) by an addition to their height of .025 beyond that shewn on LeC. 1897. (5) CHANGE SPEED SHAFT BUSHES. We consider that steel in place of bronze would be better for the bush on inner end of shaft shewn on LeC.1914. This applies to both the bushes upon which the centring spring bears. (6) WASHER BEHIND HYATT SPIGOT BEARING. This to be of steel. (7) SPLIT BUSHES IN THIRD MOTION SHAFT MIDDLE BALL BEARING. These to be of steel. (8) INTERLOCK ACTUATING LEVERS. (TOP & BOTTOM.) We noticed that with the models sent the travel of these levers was not symmetrical about a line parallel with axis of box. We realise that in this instance it could possibly be easily corrected by shortening the change speed lever shaft, but the point we wish to emphasise is that this lever to actuate satisfactorily must move equally on either side of the line referred to. (9) SERVO DRIVE. The oil retaining portion of the bore for the bearing on the near side we note was machined off. On LeC. 1937 we shewed a cover for this and speedometer drive, using existing machining on box. (10) SPEEDOMETER DRIVE CASING COVER. At present the 4 studs holding on the large cover of this drive are symmetrically arranged. In order to prevent the cover from being put on in any other position than that in which the oil duct to the bearing is uppermost, we would ask you to close in the 2 lower studs towards one another symmetrically about the vertical centre line by an amount of .075 measured on the circumference of the pitch circle. (11) REVERSE PINION SLEEVE. This piece we wish to improve by a slight chambering of the bore as shewn on LeC. 1954. herewith. The intention is that the more or less square edge at the forward end of the chambered bore should clean from the shaft particles of foreign matter when the sleeve is slid upon it, and so prevent them wedging between the shaft and sleeve when the latter is moved in the opposite direction. AJS. [STAMP: RECEIVED DEC 18 1934] | ||