A gas turbine containing an additional combustion gas compressor and a gearing drive which, on the one hand, is rotatably connected by means of a rigid coupling and an axial bearing with the gas turbine and, on the other hand, is rotatably connected by means of a further rigid coupling with the combustion...http://www.google.com.au/patents/US4380897?utm_source=gb-gplus-sharePatent US4380897 - Gas turbine containing an additional combustion gas compressor
