Patent GB-682445-A (GB)
Title: Improvements in or relating to hot-gas reciprocating engines and reciprocating engines operating on the reversed hot-gas engine principle
IPC: F02G1/043
Filed: 1948-08-20
Abstract: 682,445. Refrigerating. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Aug. 20, 1948 (Aug. 23, 1947], No. 21982/48. Class 29 [Also in Groups XXVII and XXVIII] A double acting hot gas reciprocating engine has an even number of cylinders and not less than four cylinders each with a piston movable. therein and another reciprocating engine or reciprocating apparatus is coupled to the hot gas engine and driven thereby. The pistons of the hot gas engine are arranged in pairs in which one piston of one pair moves in a predetermined phase differing relationship with the other piston of the pair the required movements of the pistons being obtained by coupling together the pistons of a pair through a reciprocating member which performs reciprocating motion in a direction substantially at right angles to the motion of the pistons and at double the frequency of the piston movement. Figs. 1a and lc are views of a four cylinder hot gas engine to each piston of which (two only 15, 25 shown) is attached a piston (16, 26) of a compressor. In an alternative the compressors are replaced by refrigerating engines. The top part of each engine cylinder is connected to the bottom of the next cylinder and the pistons in one cylinder are arranged to be 90 degrees out of phase with those in the next. The desired phase relationship is maintained by the driving gear shown, in which piston rods 1, 2 are pivoted to the ends of links 11, 21 the other ends of the links being pivoted to opposite sides of a slide block 50. The link 11 is pivoted at its centre to a crank member 12 journalled in a fixed part 17 and the link 21 is connected to a similar crank member 22. A similar arrangement is provided comprising links 31, 41, slide block 51, and crank members 32, 42 in connection with the piston rods 3, 4, of the remaining two cylinders. The crank members 12, 22, 32, 42, are respectively connected to cranks 19, 29, 39, 49 and the cranks 19, 39 are interconnected by a connecting rod 53 while the cranks 29, 49 are interconnected by a connecting rod 54. The crank members are weighted and weights 18, 28, 38, 48 are provided for balancing purposes. The cylinders in the arrangement shown are positioned with their centre lines at the corners of a square but may be positioned at the corners of a rectangle or a parallelogram. The Specification as open to inspection under Sect. 91, describes a modification, Fig. 1 (Cancelled) comprising a combined hot gas engine and refrigerating engine operating on the reversed hot gas engine principle the piston 1 of the hot gas engine being connected with the piston 4 of the refrigerating engine by a rod 3 and the displacer 6 of the hot gas engine being connected to the refrigerating engine displacer 9 by a rod 8. In order to maintain a phase difference of 90 degrees between the pistons and displacers the rods 3 and 8 are interconnected by balance levers 26, 37 pivoted at points 28, 29 and levers 20, 21, 30, 31. Weights 36, 37, 38, 39, respectively are attached to the levers 20, 21, 30, 31, for balancing purposes. In a modification the levers 20, 21 instead of carrying balance weights are each connected by a connecting rod to a piston of a double acting compressor. The refrigerating engine is in this case replaced by a second hot gas engine. This subject-matter does not appear in the Specification as accepted.