GB605199A - Improvements in free-piston compressors and gas-generators - Google Patents

Abstract

605,199. Free - piston compressors and free-piston gas generators. PESCARA, R. P. Sept. 14, 1945, No. 23802. Convention date, May 30, 1944. Drawings to Specification. [Classes 7 (i) and 7 (ii)] Two free-piston assemblies each comprising a power piston rigid with a compressor piston and constrained to move oppositely by a synchronising mechanism are guided by a guidebar separate from the synchronising mechanism and eccentrically located in the compressor cylinder and the guide-bar is arranged parallel to the direction of movement of the free piston assemblies and passes through the compressor pistons. As shown in the Figure of Specification 605,196, opposed free-piston assemblies of a gas generator comprising compressor pistons 6, 6<1> rigid with power pistons 5, 5<1> are guided by bars 20 fixed eccentrically within the compressor cylinders by attaching them to partitions 9 between the compressor cylinders and a scavenging air space around the working cylinder 1. The guide-bars 20 are hollow and interconnected by a tube 20a so that a permanent inter-connection is provided between pneumatic energy accumulators 7B. Starting gas can be introduced into the tubes 20, 20a from a starting device 22. The device 22 may be located in the position shown dotted at the outer side of the left-hand compressor cylinder. The inter-connection of the accumulators and introduction of starting air, into them is also described in Specification 605,195. The guidetube 11 within the piston assembly and the gland 14 between the guide and the piston assembly are described in Specifications 605,196 and 605,197. The guide-bar may have slight play in the compressor piston in a radial direction to provide for differences in expansion of the pistons and the partitions 9.