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).
Testing rubber squeegee and 'Mystic' chemical windscreen wipers.
| Identifier | WestWitteringFiles\E\November1920\ Scan77 | |
| Date | 22th November 1920 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to BN.{W.O. Bentley / Mr Barrington} c. to DA.{Bernard Day - Chassis Design} c. to EY. c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Sp{Mr Spinney} (Sales) ORIGINAL. 6FC X.4175 Hs{Lord Ernest Hives - Chair}8/LG22.11.20. WIND SCREEN WIPERS. We have tested several forms of rubber squeegee wipers and also the "Mystic" Chemical Wiper. We have not found the rubber squeegee type very successful. The reason being that when the squeegee is operated it actually dries the wind screen. This means that immediately after it has been operated the glass becomes covered with rain spots. We consider it is quite wrong for a squeegee to dry the screen. The squeegee should be made with a very light pressure so that all it does is to form the rain drops into a sheet of water. After all, the only thing one can expect to do to improve the wind-screen when it is raining is to make the water run off in a sheet. We have found we get the best results with the "Mystic" Wiper. This is a felt pad impregnated with certain chemicals. If the "Mystic" wind-screen wiper is rubbed over the screen, it prevents any rain spots standing on the screen. RECEIVED NOV 23 1920 Hs.{Lord Ernest Hives - Chair} R.R. 235A (100 T) (S.H. 159. 11-S-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800. | ||