GB190223153A - Improvements in and relating to Tandem Compound Engines - Google Patents

Abstract

23,153. Hardill, J., and Benson, R. Oct. 23. Compound engines with valves for converting double-acting engines into single-acting; slide valves -Relates to engines of the tandem compound type, and consists in means for enabling the engine to be worked either single-acting or doubleacting by a double - D slide valve actuated by a single eccentric. Fig. 1 shows an external view of the cylinders and valve-chest, and Fig. 2 a section at right-angles to Fig. 1. Steam-inlet openings 13, 14, both connected with the branched supply pipe 9, are arranged one on each side of the passages 7, 8 leading from the valve-chest to the high - pressure cylinder 1. By means of valves 11<1>,12<1>, both the openings 13, 14 may be supplied with steam so as to make the engine double-acting, or either may be closed so as to make it singleacting. The steam passages of the low-pressure cylinder 2 are disposed as usual one on each side of the final exhaust 15. Steam is distributed to both cylinders by a single valve 17, which works between the cylinder port face and a plate 19 pressed against its back by springs. The valve has two cavities or Dees 20, 21, and is hollow from end to end, and has three ports 22, 23, 24 communicating with the hollow interior, whereby the steam is conveyed from the cylinder 1 to the low-pressure cylinder 2.