Abstract: A TTL gate for driving large capacitive loads with minimal current drain of the gate's power supply during the logic low output level is provided. The current drain from the power supply is minimized by a feedback means which becomes active when the logic low output level is reached. The feedback means comprises a current mirror circuit connected between the drive means and the output means of the gate. The drive means also comprises a current mirror circuit.

Abstract: An amplifier circuit including a FET inverter with its N channel device being part of the controlled leg of a first current mirror, and its P channel device being part of the controlled leg of a second current mirror. The operating point of the inverter is the reference signal applied on the input to the current mirrors.

Abstract: A fluid system for the rail brake cyclinder of a highway/rail vehicle including a control valve responsive to brake pipe pressure drops to provide a control signal to a variable load relay valve assembly which provides brake cylinder pressures. The relay valve assembly maintains the rail brakes deactivated in the highway mode, provides braking pressure independent of the variable load portion for low pressure in the control valve's auxiliary reservoir, maintains a rail reservoir and rail suspension supply changed from the highway and rail supply lines, and creates an emergency condition in the brake pipe for low rail supply line and or rail reservoir pressure.

Abstract: In a movable basketball hoop structure, a detent of the lock mechanism rides along a rail in the unlocked position to retard the pivotal motion of the hoop. The rail also forms part of the return assembly and the compression elements of the return mechanism is interconnected to the detent to bias the detent against the rail in the locked and unlocked positions.

Abstract: An input circuit for applying a supply voltage to the input/output voltage nodes of a regenerative latch in response to date inputs. A reference transistor applies a portion of the supply voltage to one node and a data transistor applies the full supply voltage to the other node in response to a data input signal. Write transistors control the connection of the data and reference transistors to the supply voltage. A precharge circuit is connected to the voltage nodes.

Abstract: A residual crystallization retardation layer is provided between the non-crystalline switchable semiconductor layer and each electrode structure. Amorphous germanium, silicon or carbon form good crystallization retardation layers and also minimize electromigration and reduce solubility of tellurium in the electrodes.

Abstract: A system for generating a dry coal weight signal is provided, wherein the moisture content of a coal feed to a solid fuel burner is determined, and the dry coal weight calculated on that basis. Moisture content is determined by measuring density of the coal being fed and/or the torque required to drive a head pulley about which the belt feeding the coal is led at a constant velocity. The dry coal weight signal can be communicated to the drive means, whereby the belt speed is accelerated or decelerated to maintain a constant supply of coal, on a dry weight basis, to the boiler. Also disclosed is a control system employing the dry coal weight signal for a plurality of control functions.

Abstract: Manual speed adjusted cloth inspection machines are converted to fixed cloth speed machines by replacing the transmission and variable ratio pulley and belt drive system with a cloth speed responsive tachometer controlling the speed of a motor to drive the reel mount at a constant speed through a fixed ratio pulley and belt drive system. Conveniently located start, stop and reversing switches are provided as well as end of roll speed control.

Abstract: A fluid system for the rail brake cylinder of a highway/rail vehicle including a control valve responsive to brake pipe pressure drops to provide a control signal to a variable load relay valve assembly which provides brake cylinder pressures. The relay valve assembly maintains the rail brakes deactivated in the highway mode, provides braking pressure independent of the variable load portion for low pressure in the control valve's auxiliary reservoir, maintains a rail reservoir and rail suspension supply changed from the highway and rail supply lines, and creates an emergency condition in the brake pipe for low rail supply line and or rail reservoir pressure.

Abstract: A polycrystalline silicon memory element having an impurity concentration in the range of 10.sup.17 to 10.sup.20 atoms per cubic centimeter is reversibly switchable from a high to a low resistance state through a negative resistance region using a voltage above the threshold having a ramped trailing edge.

Abstract: The dice of a wafer are serialized using a wafer mask formed by stepping and repeating a chip pattern with a blank area in rows and columns on the wafer and forming distinctive location identifying indicia in the blank area on each chip using a pattern generator and stepping to each blank area on each chip.

Abstract: In a memory array wherein each cell includes an emitter follower, a diode is formed on the emitter by a thin layer which is capable of being shorted by vertical migration of bit line atoms through the layer and into the emitter region. The thin layer is fabricated by epitaxially growing the thin layer over the wafer with the emitter diffusion aperture open, oxidizing the epitaxial layer, selectively removing portions of the polycrystalline epitaxial layer and removing the oxide from the remaining epitaxial layer in the emitter diffusion aperture.

Abstract: A memory cell having two mesa bipolar transistors separated by a valley in which two doped polycrystalline load resistors are formed. Doped polycrystalline conductors connect the resistors to a respective backside metallic collector contact which is between a support structure and a transistor and to a respective base.The cell is fabricated by removing a substrate upon which was formed an epitaxial layer and top support, applying a backside metallic layer, forming a bottom support, removing the top support, etching the epitaxial layer to form mesas, etching the backside metal to form discrete contacts, and forming multi-level resistors and conductors in the valley between the mesa transistors separated by insulative material.

Abstract: A lock having a first portion for engaging a first coupling and in concert with a shoulder of a second portion to lie in the plane of the lip of a second coupling inhibits uncoupling rotation. A third portion of the lock for engaging the first coupling maintains the shoulder in the plane and the lock is further maintained in position by a fourth portion engaging both couplings. The first and third portions are in substantially the same plane for ease of insertion of the lock.

Abstract: An integrated circuit memory including a random memory (RAM) and a plurality of electrically alterable read only memories (EAROMS) having common controls. The data input for the RAM is either the system input or an EAROM and the data input for the EAROMS is only from the RAM. The system data output is from the RAM and the EAROMS.

Abstract: A diode equalizing bridge wherein one pair of opposed diodes are forward-biased and a second pair of opposed diodes are reverse-biased so that the two capacitors at the opposed load terminals are charged and discharged by a current source and current sink connected to two opposed power terminals until the capacitors have equal voltages. The current source and sink are gated to activate and deactivate the bridge. For an AC power source, two diode bridges are used, one connected to each terminal of the capacitor to operate during the respective half cycle of the AC power source.

Abstract: The packing for elements of a valve subject to reversal of differential pressure includes a pair of spaced packings with a recess there-between connected to atmosphere to eliminate reversal of differential pressure across individual packings of the pairs.

Abstract: A first voltage pulse is applied having sufficient amplitude to switch the device from a high to a low resistance state and subsequently maintaining a holding current. A second voltage pulse is applied after the device has switched to drive the filamentous path into the liquid phase for a short duration.

Abstract: A loop controller transmits data to and receives data from a plurality of I/O ports on a TDM serial loop by generating a plurality of frames which include a frame control field followed by a plurality of dedicated time slot fields. Each time slot field includes an inbound data control bit or bits followed by a data field followed by an outbound data control bit or bits. The I/O port inputs and outputs data in its dedicated data field as dictated by the respective data control bit. The loop controller and I/O ports monitor the data control bit to request data, indicate insertion of data, indicate receipt of the data and acknowledge the receipt indication to achieve a complete handshake. During an initialization frame, the I/O ports set themselves into primary and secondary data modes based on sensing a prior I/O port with the same dedicated time slot.