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 Hadfields recommending a specific insulating varnish for the impregnation of electrical windings.
| Identifier | ExFiles\Box 168a\3\ img345 | |
| Date | 10th February 1937 | |
| MAKERS OF FINE VARNISHES & JAPANS SINCE 1840. 614 2 LONDON - PARIS - CALCUTTA CONTRACTORS TO H.M. GOVERNMENT. HADFIELDS (MERTON) LIMITED WESTERN ROAD MITCHAM SURREY TELEGRAMS: "DURAGLOSS, MITCHAM" ASSOCIATED WITH FOSTER, MASON & HARVEY LTD MAKERS OF HIGH CLASS PAINTS AND SHIPS COMPOSITIONS. FACTORIES: VARNISH ENAMEL PAINT MERTON, MITCHAM. MITCHAM. CALCUTTA. DUBLIN, PARIS. PARIS. CALCUTTA. TELEPHONE NO. MITCHAM 2234 (4 LINES) CODES: BENTLEYS, A.B.C. 5TH ED.{J. L. Edwards} MARCONI INTERNATIONAL, PRIVATE. ALL QUOTATIONS WITHOUT ENGAGEMENT. INSULATING VARNISH DEPARTMENT. Your ref: Em/Wst.7/AP. 10th February, 1937. ID:FER:RGS:14. WST Messrs. Rolls-Royce Ltd., Experimental Department, Nightingale Road, DERBY. RS{Sir Henry Royce's Secretary} Dear Sirs, IMPREGNATION OF ELECTRICAL WINDINGS WITH VARNISH. We thank you for your letter dated 9th February, contents of which we have carefully noted. We can recommend with every confidence our Durameg C.S.Clear Stoving Impregnating Insulating Varnish for treatment of the windings you refer to as this material will not attack or tend to dissolve the enamel. As you will re-collect, we have supplied some of this varnish against your order No.91973, and we therefore trust that your tests with this material will give you every satisfaction. Yours faithfully, HADFIELDS (MERTON) LIMITED. INSULATING DEPARTMENT. SOLE MAKERS OF HE-O-LIN ENAMEL & PAINT | ||