Abstract: A reversing marine drive utilizing a gas generator prime mover provided with first and second counter-rotating power turbines. The first turbine is connectable by a differential gear set and a pinion and reduction gear assembly to the ship's shaft to drive the shaft and the screw thereon in the forward thrust direction. The second turbine is connectable by the differential gear set and the pinion and reduction gear assembly to the ship's shaft to drive it and the screw thereon in the reverse thrust direction. A brake assembly is provided in association with each of the first and second power turbines so that when one of the power turbines is driving the screw, the other power turbine is stopped. A master computer may be provided to control the reversing marine drive.

Abstract: A cooling system for a high speed gear includes a plurality of passages extending through the gear and a hydraulic slip ring for delivering cooling fluid to the passages and for scavenging cooling fluid after it passes through the passages. The slip rings include collector rings and scoops, as well as the nozzles mounted in the passages for spraying cooling fluid into a baffled collector ring.

Abstract: A spaced apart apertured dual diaphragm fluid flow control device utilizes one flexible overcenter diaphragm to sense a variance flow condition and flex over center into engagement with the other diaphragm where cooperative apertures in the diaphragms cut off or regulate fluid flow through the device. Electrical circuit means are provided for an operational signal.

Abstract: A low cost, portable computer aided runout measuring system for cylindrical components comprises an electrically interconnected displacement transducer, a computer and an ancillary angle measuring device. Runout deviations are stored in the computer in a displacement vs. time mode while concurrently therewith the angle at deviation is stored in the computer.

Abstract: A flow metering device includes a standpipe mounted in a fluid reservoir such that when the level of fluid in the reservoir falls to a predetermined level, flow is metered through holes provided in the standpipe at a reduced rate of delivery.

Abstract: A propeller engine system with means for generating electric power within a rotatable hub is disclosed. The means include a shaft extending into the hub so that the hub and shaft are differentially rotatable. Magnetic means are fixed to the shaft and winding means are fixed to the hub so that either rotation of the rotor shaft or hub induces an electric current in the winding means.