Abstract: A programmable logic array is constructed of independently controllable logic building blocks of two types and special output logic to perform desired logic functions. The first building block is a functional element which is capable of performing any logical function of its input data to create output data. The functional elements shown are based on three inputs with a single output. The second basic type of building block is a pass-through/hold device which may either pass its input directly through as an output, or which may latch and hold the input until clocked. A plurality of logic levels or ranks of elements of the first type and ranks of the second type are interconnected so that the output can be various functions of the inputs. The logic array described here has first and second logic levels consisting of functional elements followed by a third level of pass-through/hold devices. The fourth and fifth logic levels are functional elements and pass-through/hold devices.

Abstract: This invention teaches a method for producing small machined parts by laser including a description of how to avoid sensitive edges of the work piece being machined and how to control beam size for maintaining uniform cavity depth over a relatively long work piece and also how to generate non-uniform cavity depth profiles on the surface of one or more parts. The invention also teaches that such a process can be used to produce satisfactory negative pressure air bearing sliders which are used to support the transducing magnetic heads for high density magnetic storage disk drives.

Abstract: This invention provides for a method and apparatus for assembly of complex systems by human operators with the assistance of automatic machinery. The machinery employes a lighted probe to direct the operator to insert a part of the lighted location and the machinery tests for proper seating of the part. The machinery is integrated into a larger automated system which enhances its automatic part location indicating function by allowing and correcting for mislocation of real world coordinates from ideal coordinates. Also taught is a method for integration fo the assembly operation from the design stage through the production phase.

Abstract: An improved ring oscillator for VLSI chips is shown, formed at the chip periphery. It may have specific initiation gates and have additional parasitic capacitance added to the ring to enhance accuracy. The circuit elements used for the ring are the same as those used for more centralized circuits.

Abstract: This invention describes a means and method for moving an arm in precise angular increments to a degree of precision far beyond the capacity of a normal reduction gear assembly acting at the impetus of a stepper motor. At rest a set of paired and unequal high precision gear sets hold the member in place. To accomplish movement, they are decoupled and a normal reduction gear mechanism is employed to drive the member to the approximate location desired. The more precise location of the member is accomplished by the recoupling the high precision gear sets. Thus, without high precision movement a high precision location is attained.

Abstract: A construction for actuator assemblies is disclosed using a material of low permeance as a structural element, included normal to the axis of coil movement to lower coil inductance by reducing reactance flux in support structures and providing a channel for eddy currents set up in response to coil reactance. The net result is enhanced coil responsiveness to energization.

Abstract: An optical recording system has a system optical apparatus carried by a fine tracking system which moves the optical apparatus for small track seeking movements and for track following. The fine tracking system is carried by a linear actuator coarse tracking system which makes large track seeking movements so that the entire area of the optical recording media is available to the system. Both the coarse tracking system and the fine tracking system are operated by servo control loops. The fine tracking system responds to tracking status signals with respect to track following and track seeking signals in response to track addressing information. The coarse tracking system responds to position sensor signals derived from a position sensor which is associated with the fine tracking system and provides signals related to the relative position of the fine tracking system to the coarse tracking system.