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).
Test results and historical information on the Wills Patent Pressure Filled Joint Ring.
| Identifier | ExFiles\Box 86\1\ scan0080 | |
| Date | 12th October 1932 guessed | |
| TABLE 2. RESULTS OF TESTS. No. Eng. Dept. Test Mark. | Axial Load. Tons. | Axial Thickness. | Internal Pressure. Tons/sq. in. | Result. ---|---|---|---|--- GOQ 1 | 7·75 | 5/32 | 0·65 = 1456 lbs. | Joint leaked. | 12·25 | 1/8 | 1·05 = 2352 ,, | ,, ,, | 15 | — | 1·35 = 3024 ,, | ,, ,, | 20 | — | 1·65 = 3696 ,, | ,, ,, | 25 | — | 1·8 = 4232 ,, | ,, ,, | 30 | — | 2·45 = 5488 ,, | ,, ,, | 35 | — | 2·65 = 5936 ,, | ,, ,, | 40 | — | 3·05 = 6832 ,, | ,, ,, | 45 | 3/32 | 4·1 = 9184 ,, | ,, ,, | 50 | .090 | 4·4 = 9856 ,, | Maximum pressure given by pump. GOQ 2 | 8 | 5/32 | 1·0 = 2240 lbs. | Joint leaked. | 12 | 1/8 | 1·2 = 2688 ,, | ,, ,, | 20 | — | 1·9 = 4256 ,, | ,, ,, | 35 | — | 2·8 = 6272 ,, | ,, ,, | 40 | — | 3·3 = 7392 ,, | ,, ,, | 45 | — | 3·4 = 7616 ,, | ,, ,, | 50 | — | 4·0 = 8960 ,, | ,, ,, | 55 | — | 4·6 = 10304 ,, | ,, ,, | 60 | — | 5·3 = 11872 ,, | ,, ,, | 65 | .080 | 6·15 = 13776 ,, | *Ring burst at welded joint. GOQ 3 | 9·5 | 5/32 | 1·5 = 3300 lbs. | Joint leaked. | This was tested in the recessed joint. | | | | 14·25 | 1/8 | 2·25 = 5340 lbs. | ,, ,, *The ring appears to have split at this load since a sound of escaping gas could be heard. TABLE 3. DIMENSIONS OF RINGS AFTER TESTS. No. Eng. Dept. Test Mark. | Diameter : Inches. | | Average axial thickness. Ins. | Remarks. ---|---|---|---|--- | Outside. | Inside. | | GOQ 1 | 3·80 | 3·31 | 0·094 | The pressure in the ring was shown by bulge in one position where the axial thickness recovered to 0·1315". GOQ 2 | — | — | 0·084 | — GOQ 3 | 3·74 | 3·33 | 0·1625 | The recess limited the change in dimensions of this ring. 18 HISTORICAL. THE WILLS PATENT PRESSURE FILLED JOINT RING is the invention of Messrs. Percy and Arnold Wills, who have for many years been actively associated with Messrs. W. & F.{Mr Friese} Wills, Ltd., Engineers, of Bridgwater. The activities of Messrs. W. & F.{Mr Friese} Wills, Ltd.—founded by Mr. Frank Wills in 1876—have, in the course of over 50 years, covered a wide range of mechanical engineering, mainly in connection with steam and internal combustion engines, and have provided a wide and comprehensive experience of the difficulties attending the design, installation and repair of such engines, and their auxiliaries. So far as the Patent Joint Ring itself is concerned, it is the result of research work undertaken to discover a jointing material providing sufficient resilience, and at the same time capable of holding the increasing pressures associated with modern engines, pumps, and pipe lines, and of withstanding the considerable degree of heat so often associated with these high pressures. 3 B | ||