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).
Procedure for handling and rectifying issues with K.S. Pressure Gauges.
| Identifier | ExFiles\Box 44\4\ Scan130 | |
| Date | 6th December 1929 | |
| 84038. To Hm.{Capt. W. Hallam - Head Repairs} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} For Depot Sheet. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}5/MJ.6.12.29. K.S. PRESSURE GAUGES. It has been found that during handling it is possible to get a small amount of Tetrabromide liquid into the small capillary tube which constitutes the balance pipe at the head of the glass tube. When this occurs, the functioning of the gauge is upset. The procedure adopted to prevent the liquid getting into the top of the capillary is to empty all the liquid out before transport, blow the gauge through with high pressure air from the pressure balance end, thus cleaning as far as possible the small quantity of liquid from the walls of the glass tube. The gauge is then filled to zero and the liquid run back into the back tube. Thus the amount of liquid left on the walls of the glass tube capable of running up and blocking the top capillary, is reduced to a minimum. We recommend that when a gauge behaves erratically and its peculiarities cannot be accounted for otherwise, that the liquid should be emptied out and the top capillary tube blown through as specified above. The gauge can then be re-filled and should function correctly. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||