Abstract: A MMIC power amplifier having a smaller die size and higher power output are realized with the improved amplifier and transistor geometry herein provided. In particular, transistors, such as FETs (field effect transistors) are displaced from a conventional FET geometry with alternating FETs being rotated in opposite directions. The inputs (gate pads) and outputs (drain pads) of two adjacent FETs may be “shared.” In a shared input configuration, a compensation network may be coupled to the input. The improved FET configuration reduces the number of splitting and combining networks by up to 50% over the prior art and the die area for a typical 4 watt power amplifier is reduced by 48-72% over the prior art. The improved amplifier configuration provides a multi-sectional configuration wherein one section may be the mirrored image of another. In a two section amplifier, the amplifier appears to be “folded.

Abstract: A MMIC power amplifier having a smaller die size and higher power output are realized with the improved amplifier and transistor geometry herein provided. In particular, transistors, such as FETs (field effect transistors) are displaced from a conventional FET geometry with alternating FETs being rotated in opposite directions. The inputs (gate pads) and outputs (drain pads) of two adjacent FETs may be “shared.” In a shared input configuration, a compensation network may be coupled to the input. The improved FET configuration reduces the number of splitting and combining networks by up to 50% over the prior art and the die area for a typical 4 watt power amplifier is reduced by 48-72% over the prior art. The improved amplifier configuration provides a multi-sectional configuration wherein one section may be the mirrored image of another. In a two section amplifier, the amplifier appears to be “folded.

Abstract: A movable platform is mounted on opposing guide rails within a disk drive. A head actuator and spindle motor are mounted on the movable platform. The platform moves on the guide rails from a forward position to a rearward position upon insertion of a disk cartridge into the disk drive. As the platform moves toward the rearward position, the elevation of the platform changes in order to bring the spindle motor into engagement with the hub of the disk cartridge. A latch member is pivotally mounted on one of the guide rails for latching the platform in its forward position when the disk drive is not in use.

Abstract: A movable platform is mounted on opposing guide rails within a disk drive. A head actuator and spindle motor are mounted on the movable platform. The platform moves on the guide rails from a forward position to a rearward position upon insertion of a disk cartridge into the disk drive. As the platform moves toward the rearward position, the elevation of the platform changes in order to bring the spindle motor into engagement with the hub of the disk cartridge. A latch member is pivotally mounted on one of the guide rails for latching the platform in its forward position when the disk drive is not in use.

Abstract: A magnetic head assembly having a flat surface for disposition adjacent to a recording medium and a protrustion in the range of about 1 to about 20 micro-inches on the flat surface effects coupling of the head assembly to the recording medium and creates a constant contact zone, surrounding the read/write gap of the head assembly, between the head assembly and the record medium. The preferred range for the protrusion is about 6 to about 8 micro-inches and the area of the flat surface is preferably in the range of about 3 to about 4 square millimeters.

Abstract: A gas turbine engine fuel system comprises a main fuel manifold and starter fuel manifold which direct fuel into the combustion apparatus of a gas turbine engine. During normal engine operation, fuel flow to the starter manifold is prevented by a solenoid valve. Air from within the combustion apparatus then flows back through the starter manifold and into a fuel drains system of the engine to purge the starter manifold of fuel. This purging of fuel in the starter manifold engine operation prevents the undesirable leakage of fuel into the combustion apparatus from the starter manifold.

Abstract: A fuel system for a gas turbine engine is arranged to schedule fuel flow between primary and secondary fuel injectors in order to obtain good ignition and light round when the engine is operating on diesel fuel. The system includes either two solenoid valves in parallel with flow restrictors or a single solenoid operated valve and two flow restrictors. The two valves or the diverter valve schedule the fuel flow so that at engine start up, the flow to the primary and secondary fuel injectors is according to requirement proportioned. At a certain engine speed the flow to the secondary fuel injectors is reduced to purge flow and the major part of the fuel flow passes to the primary fuel injectors.

Abstract: A control apparatus for the bleed valve of a gas turbine engine compressor enables the engine to be operated with a low risk of compressor surge or stall, particularly on emergency shut down.The control apparatus includes a control valve and a diverter valve. In normal operation the bleed valve is controlled by the control valve which receives a flow of high pressure air from the engine compressor. In an emergency shut down, the diverter valve is operated to allow the high pressure air to flow directly to the bleed valve, without passing through the control valve.The diverter valve can be fuel pressure responsive or solenoid operated.

Abstract: A magnetic disk drive for writing and reading data to and from a magnetic disk contained in a cartridge which is inserted through an opening in the disk drive includes a drive motor rotated on a yoke by a manually operated shaft having a handle on one end and a cam on the other end. A flat diaphragm switch is operated by a rotation stop on the shaft to indicate when the motor is in the loaded position of engagement with the disk.

Abstract: A cleaning cartridge for a magnetic disk drive has a flexible cleaning pad on a wiper assembly which is rotatable in the base of the cartridge. A knob on the outside edge of the cartridge is moved back and forth to rotate the wiper assembly by a cable attached to the hub. As the assembly rotates, a cam surface forces the flexible pad into engagement with the head to clean it.

Abstract: An order filling apparatus includes an elongated belt conveyor having a bin-on switch and a bin-off switch at opposite ends thereof. A plurality of item dispensers are positioned along the conveyor, and each dispenser is loaded with a single type of item. An order filling control computer has a bus cable extending along the conveyor, and each dispenser has a dispenser control board connected to the bus. Each control board includes an address decoder and circuitry for relaying command signals from the controller to the dispenser and for generating status signals indicating the operational status of the dispenser. A conveyor travel encoder provides a position signal indicative of conveyor travel. The controller stores orders to be filled with items. An order filling method includes a conveying item receptacle bins past the dispensers to receive items therefrom. As each bin engages the bin-on switch, an order is activated and associated with the bin.

Abstract: A process is provided for removing suspended solids from a waste water stream exiting from a wet rendering plant, a centrifugal rendering plant and/or a hide curing brine system before the stream enters a public sewer system. Such waste water typically has some oils, fats and/or protein particles in addition to easily settled solids previously removed therefrom. The waste water is delivered to a holding tank wherefrom the waste water is drawn and pH adjusted with sodium carbonate, sodium hydroxide, or the like. Air is injected into the pH adjusted waste water along with flocculating agent such as ferric sulfate. Thereafter, the waste water is injected at a relatively low velocity into a flotation tank wherein flocculated wet solids urged upwardly by the injected air are allowed to float to the top of the tank and water which is relatively low in suspended solids and biological oxygen demand is removed from the lower portion of the tank and is pH adjusted and sent to a sewer.