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 Autovac Manufacturing Co. Ltd explaining the cause of failure of a returned Autovac apparatus due to wear on the suction valve.
| Identifier | ExFiles\Box 40\4\ Scan359 | |
| Date | 14th January 1932 | |
| THE Autovac MANUFACTURING CO. LTD HEATON NORRIS STOCKPORT TELEPHONE: 663 TWO LINES TELEGRAMS: AUTOVAKING STOCKPORT DIRECTORS: J.{Mr Johnson W.M.} HIGGINSON H.{Arthur M. Hanbury - Head Complaints} ARUNDEL J.{Mr Johnson W.M.} A.{Mr Adams} CHARLTON G.{Mr Griffiths - Chief Accountant / Mr Gnapp} A.{Mr Adams} GASTALL Handwritten: X3579. OUR REF. 228.R. Messrs. Rolls-Royce Ltd., DERBY. YOUR REF. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}4/KT. OUR REF. 228.R. 14th January, 1932. Dear Sirs, We are in receipt of your letter of the 11th inst. with further reference to the Patent AUTOVAC Apparatus returned a short time ago for test. As requested, we are arranging for this instrument to be returned to you as received. Reference to the enclosed blue print will, we think, make clear our explanation as to the cause of failure when the car to which this AUTOVAC was fitted was stationary. As previously mentioned, this was due entirely to slight wear on the Suction Valve face or valve seating, which would cause the valve lever to rise to a higher level in consequence, which in turn would result in the toggle lever descending lower before the Spring passed the dead centre; the Float would thus reach the bottom of the inner chamber before the Valves were operated. If we can furnish any further information in connection with the above we shall be pleased to hear from you again. Yours faithfully, THE AUTOVAC MFTG. CO. LTD. Encls:- B.P. | ||