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 improvements relating to liners for the cylinders of reciprocating engines.
| Identifier | ExFiles\Box 140\4\ scan0278 | |
| Date | 21th July 1931 | |
| LEYLAND MOTORS LIMITED. Half length cylinder liner. PATENT SPECIFICATION 373,839 Convention Date (Switzerland): Sept. 1, 1930. Application Date (in United Kingdom): July 21, 1931. No. 20,799 / 31. (Patent of Addition to No. 351,726; dated Aug. 13, 1929.) Complete Accepted: June 2, 1932. COMPLETE SPECIFICATION. Improvements in or relating to Liners for the Cylinders of Reciprocating Engines. We, SULZER FRÈRES SOCIÉTÉ ANONYME, a Company organised under the Laws of Switzerland, of Winterthur, Switzerland, do hereby declare the nature of this invention and in what manner the same is to 5 be performed, to be particularly described and ascertained in and by the following statement:— This invention relates to an improvement in or modification of the divided 10 liner for the cylinder of a reciprocating engine claimed in British Patent No. 351,726, wherein the engaging ends of the liner sections are stepped or flanged with the abutting ends of the inner flanges 15 of undulating or wave-like form whilst the abutting edges of the surrounding outer flanges lie in a plane at right angles to the cylinder axis. According to the present invention the 20 liner is furnished with one or more sets of ports in the zone of the joint between the liner sections, the parts of the undulations which lie between the bends or peaks and are inclined to the cylinder axis 25 passing through those parts of the liner wall which separate adjacent ports in each set. In the accompanying drawings— Figure 1 illustrates diagrammatically 30 and by way of example one construction of joint between two liner sections according to the invention, and Figure 2 is a similar view of a modified construction also according to the inven- 35 tion. In the construction illustrated in Figure 1 the liner sections 1 and 2 have undulating or wave-like engaging edges 3 and 4 respectively, sufficient clearance being 40 left between these edges to allow for expansion of the sections. Each liner section is so constructed that when these sections are in engagement ports 5, 6, 7 and 8 are formed in the zone of the undulat- 45 ing joint which is so formed that the pitch or wave-length w of the undulations is substantially equal to the pitch or spacing v i.e. the distance between the centres of adjacent ports. In this way the piston 50 does not have to pass over sharply curved portions of the joint such as those indicated at 9 but has only to pass over the oblique parts 10 of the joint, whereby any sudden encounter of the piston rings with 55 the joint is avoided. The construction shown in Figure 2 is similar except that the wave-length w of the undulations is double the distance v between the centres of adjacent ports. 60 It will be appreciated that the distance between the centres of the ports may be the same or may differ from each other, that is to say the ports may be distributed at regular or irregular intervals round the 65 cylinder. Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we 70 claim is:— 1. An improvement in or modification of the divided liner for the cylinder of a reciprocating engine claimed in British Patent No. 351,726, according to which 75 the liner is furnished with one or more sets of ports in the zone of the joint between the liner sections, the parts of the undulations which lie between the bends or peaks and are inclined to the cylinder 80 axis passing through those parts of the liner wall which separate adjacent ports in each set. 2. A divided liner for the cylinder of a reciprocating engine having the undu- 85 lating edges of the engaging ends of the liner sections arranged substantially as described and shown in Figure 1 or in Figure 2 of the accompanying drawings. Dated this 21st day of July, 1931. KILBURN & STRODE, Agents for the Applicants. Redhill: Printed for His Majesty's Stationery Office, by Love & Malcomson, Ltd.—1932. [Price 1/-] | ||