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 The Packless Gland Co. Ltd. providing updated specifications for their No. 2 and No. 3 bellows.
| Identifier | ExFiles\Box 4\1\ 01-page042 | |
| Date | 22th February 1934 | |
| X4694 Telephone: SUNBURY 406 Codes: BENTLEY'S, WESTERN UNION. Telegrams & Cables: PACKLESS, SUNBURY COMMON THE PACKLESS GLAND CO. LTD. MAKERS OF THERMOFLEX Bellows and Shaft Seals. THERMOFLEX WORKS. Windmill Road, Sunbury, Middlesex. DIRECTORS: M.{Mr Moon / Mr Moore} PAYNE. W. A.{Mr Adams} PAYNE. W. F.{Mr Friese} P. MARTIN-HURST. W.M.H/GH: Your Ref: E/FSN. 1/HP. February 22nd, 1934. Messrs. Rolls-Royce Limited, DERBY. Dear Sirs, We thank you for your letter of the 21st February. Owing to slight modifications in our standards the number of convolutions corresponding to the free length stated in our list for bellows No.2 and 3, no longer holds. We therefore give below load figures for the two bellows having the catalogue normal length, as we assume that this dimension is more important to you than the number of convolutions of bellows employed. No.2 Bellows. Actual o/d...........25/32". i/d...............1/2". Normal length.......1.5/8". Convolutions........23 convolutions. Load to compress 3/16"..7½ to 8 lbs. No.3 Bellows. o/d...............1". i/d...............21/32". Normal length.......1⅛". Convolutions........18. Load to compress 9/32"..11 to 12 lbs. We trust that this information will be of assistance to you, but if you are considering using any | ||