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).
Patent specification for a pivotal bearing for reciprocating elements, such as shackle pins for springs.
| Identifier | ExFiles\Box 154\2\ scan0059 | |
| Date | 6th February 1931 | |
| 2 383,274 than between g¹ and i¹. As however according to the invention the thickness of the wall between h¹ and k¹ is greater than between g¹ and i¹, the relative stress-ing of the material is not increased at this place or is only increased to a slight extent over and above that between g¹ and i¹. The intermediate buffer member is therefore stressed approximately uni-formly throughout its cross-section. It is not absolutely necessary for the greatest thickness of the rubber ring b to be at its longitudinal centre. As will be seen from the construction according to Figure 3 it can equally well be formed at the ends of the joint, which coincides with the greatest external diameter of the sleeve a, the smallest external diameter of which is at the longitudinal centre. The sleeve a like the sleeves c, d may, of course consist of more than one part. In order to be able to absorb efficiently the axial forces in the resilient inter-mediate member b the sleeves a, c, d, are preferably so constructed that the greatest external diameter of the sleeve a is greater than the smallest internal diameter of the sleeves c, d.{John DeLooze - Company Secretary} The difference in size of the two diameters is represented in the Figs. 1 and 3 by m.{Mr Moon / Mr Moore} In this manner the resistance of the resilient intermediate member b against the shearing forces does not only act against the axial forces but the over-lapping parts produce pressure forces on the member b which can absorb the axial forces without any shearing stress of the resilient material of such member b. Having now particularly described and ascertained the nature of our said inven-tion and in what manner the same is to be performed, we declare that what we claim is:— 1. A pivotal bearing for reciprocating elements more particularly suitable for the shackle pins of springs in motor vehicles, and in which a resilient inter-mediate member is pressed in between two double conical members characterised by the feature that the said resilient member is of greatest thickness at the place or places where the conical elements are of greatest diameter. 2. A pivotal bearing as claimed in claim 1 in which the greatest diameter of the inner double cone is greater than the smallest diameter of the outer double cone. 3. A pivotal bearing for reciprocating elements such as shackle bearings for the springs of automobile vehicles comprising inner and outer rigid elements and an inner resilient element the inner and outer surfaces of which lie on cones of differing angle. 4. A pivotal bearing including a resilient buffer element constructed sub-stantially as described with reference to Figures 1 or 3 of the accompanying drawings. Dated this 6th day of February, 1931. W. P. THOMPSON & Co., 12, Church Street, Liverpool. Chartered & Registered Patent Agents. Redhill: Printed for His Majesty's Stationery Office, by Love & Malcomson, Ltd.—1932. | ||