Abstract: Gas flow through a turbine is divided, with part of the flow directed to the compressor for the combustion chamber and part directed to the primary power turbine. Division of the gas flow is accomplished by a mixing wheel of novel design. Before passing to the primary power turbine the gas flow passes through a secondary power turbine that drives the compressor for the combustion chamber. Both the secondary power turbine and the compressor rotate independently of the main turbine rotor shaft. The power input to the secondary power turbine is varied in accordance with the pressure differential between the gas pressure at the outlet of the compressor for the combustion chamber and the outlet from the mixing wheel. If the speed of the main turbine shaft slows down more power is put into the secondary power turbine and the combustion chamber compressor is speeded up so as to produce a higher gas pressure than would otherwise be the case.

Abstract: High speed data monitoring apparatus for displaying the bit pattern of a selected portion of a block of transmitted data comprising a shift register for receiving the transmitted data and for temporarily containing the consecutive data bits therein, a programmable sync detector for monitoring the contents of the shift register and for generating a sync signal when the shift register contains a predetermined sync code, a counter for counting the data bits input to the shift register after the sync signal is generated and for generating a count complete signal when a selected number of data bits have been input to the register, a data storage device for storing the contents of the shift register at the time the count complete signal is generated, and a display for displaying the segment of data stored in the storage device.