Abstract: Apparatus and methods for the hierarchical display of routine call dependencies in a software program are implemented. A list of routines in a preselected software program is displayed in first and second regions in a window on an display device. By selecting a routine in the list in the first region, one or more routines called by the selected routine are displayed, in a tree hierarchy beneath the selected routine. Selection of a routine in the list in the second region displays, in a tree hierarchy, routines that call the selected routine.

Abstract: A mechanism is provided for predicting cache array bit line or driver failures. This mechanism checks for five consecutive errors at different addresses within the same syndrome on invocation of event scan polling to characterize the failure. Once the failure is characterized, it is reported to the system for corrective maintenance including dynamic and/or boot time processor deconfiguration or preventive processor replacement.

Abstract: A synthetic slate roofing member composed of solid surfacing material and configured to realistically resemble the appearance and texture of natural slate while being lighter in weight, more durable and less costly than natural slate. The solid surfacing material preferably incorporates various additives and fillers to enhance the physical properties and appearance of the member.

Abstract: A fireplace tray positionable on the floor of a fireplace to receive and collect ashes from burning logs in the fireplace. The tray has a collector portion which receives and collects the ashes, a rotatable support mounted to the collector toward a back wall thereof to roll the tray into and out of the fireplace and a front support mounted to the collector toward a front wall thereof to retain the tray in position in the fireplace. The fireplace tray preferably also includes handles mounted to the collector to facilitate handling of the tray and other features which permit collected ashes to be easily disposed of while maintaining the fireplace substantially clean at all times.

Abstract: Multi-layer covering articles having a base layer adapted to yieldably conform to a surface to be covered and having properties appropriate for a particular application in which the article is to be used, and a thermoplastic surface layer bonded to a surface of the base layer and incorporating a reinforcing material to provide strength and tear resistance for the covering article. The reinforcing material permits the surface layer to function as the strength-providing member of the article, permitting the base layer to be designed solely in accordance with the requirements of a particular application without regard to its strength.

Abstract: A sill cover article for automobiles and other vehicles which has a first, relatively rigid sill cover portion and a second, relatively flexible lower door sealing portion that is manufactured as a single component and can be attached to a vehicle in a single mounting operation. The sill cover article is preferably manufactured of two materials of different durometer which are coextruded to form a single component. The sill cover article or a portion thereof may be provided with various coatings and/or additives to provide the article with desired properties. For example, the lower door sealing portion may be provided with an ice-release agent to prevent ice from forming on a surface thereof. The sill cover article of the present invention provides a reduction in assembly time, inventory requirements and overall manufacturing costs of a vehicle.

Abstract: A sealing unit for a movable window of a vehicle. The sealing unit includes a one-piece, elongated, flexible sealing member having a first portion for mounting the sealing unit to a frame of a vehicle and a second portion for receiving the movable window, and a flexible, decorative trim associated with a surface of the sealing member that is viewable from the exterior of the vehicle when the sealing unit is mounted to the frame. Both the sealing member and the decorative trim are sufficiently flexible to permit the sealing unit to conform to the contour of the frame when the sealing unit is mounted to the frame in a single mounting operation to provide a substantially continuous seal between the frame and the sealing unit.

Abstract: A beamformer device for forming at least one beam from the outputs of a sensor array, including: a plurality of radiation sources; means for providing to each radiation source a signal from an associated one of the sensors in the sensor array; a detector array of radiation-sensitive means for providing a series of spaced signals representing radiation incident from each of the radiation sources; and means for varying the delays between the spaced signals for optimizing the response of the device to a signal from a predetermined direction.

Abstract: A wavefront sensor for detecting the slope of an input wavefront. A surface acoustic wave reflective diffraction grating is positioned at a focal point of the wavefront, and generates surface acoustic waves at two primary frequencies f.sub.1 and f.sub.2. The reflective diffraction grating produces a first AC shearing interferogram between two like diffraction orders generated by the f.sub.1 and f.sub.2 surface acoustic waves. A photodetector array is positioned to detect the shearing interferogram at a two dimensional array of zones, and the phase of the output signal for each zone is representative of the local slope of the wavefront in the direction of shearing, thus producing the slope in one direction. Complete two dimensional wavefront slope information is obtained by shearing the wavefront in a second orthogonal direction in substantially the same manner utilizing a second surface acoustic wave diffraction grating and a second photodetector array.

Abstract: An integrated wavefront compensator for an active optics system in which the components for detecting distortions in a wavefront and the components for correcting the detected wavefront distortions are integrated into one unit. The parallel processing channels of the compensator are fabricated simultaneously using simple, solid state components.

Abstract: An optical encoder assembly includes an integral flexible coupler. A flange extending from the flexible coupler serves as a bearing retainer to hold a disc table and unitary bearing shaft in fixed axial position relative to the bearing. The bearing is further axially fixed relative to a stationary base which supports encoder disc illuminating and detecting optics. In a preferred form, the flexible coupler extends through the center of the encoder assembly, and a dust tube is positioned between the coupler and the encoder optics.

Abstract: A half tone screen of a graphic camera is uniformly exposed by a pinhole light projector positioned off axis with respect to the main optical projection axis. A light diffuser is positioned intermediate a light source and the pinhole has a variable density light attenuator pattern consisting of a plurality of circular lines for attenuating the light passing through the diffuser and aperture in a manner to produce uniform illumination of the half tone screen.

Abstract: A method of enhancing the production of typeset runarounds involves providing a set of light transmissive overlays having straight line rectangular grid configurations to the operator of the phototypesetter, together with a worksheet for recording line indentation data; selecting one overlay having horizontal grid line spacing corresponding to spacings between the lines of the text to be typeset, superimposing the selected overlay so that the edges thereof are aligned with the extremities of the text, recording indentation information which is readily made apparent by virtue of the overlay placement, and thereafter employing the recorded indentation data during the phototypesetter process.

Abstract: In an optically multiplexed angular encoder system, encoder illuminators are sequentially enabled and detected signals are sequentially stored. Such sampling and storage of the code track signals is repeated in successive sampling windows under the control of a free-running clock such that the information required to provide a multibit angular output is available for a near instantaneous output on command.

Abstract: Thermal actuator apparatus for controlling or adjusting the position of a surface or other object as a function of temperature. The principle of operation is the rate of change, as a function of temperature, in the modulus of rigidity or elasticity of counterbalanced springs of differing materials resulting in a change in equilibrium position. An actuating surface is coupled to the spring system, and its movement with temperature change can be used to change or otherwise control the position of an object.A simple adjustment is also provided to permit varying thermal coefficients of the actuator (magnitude of the response to temperature change).

Abstract: A measuring arrangement is disclosed for measuring the contour of a two or three dimensional surface in which a redundant configuration of distance measuring systems is positioned above the surface being measured. Each distance measuring system monitors distance measurements to a point proximate the surface as the measuring point is moved across the surface. The distance measurements are taken from a sufficient number of points on the surface such that a sufficient quantity of data is obtained to define the system geometry and also to define the position of each measurement point. The data is transformed by recognized mathematical techniques into the coordinate positions of all of the measured points on the surface.In one embodiment for measuring the contour of a three dimensional surface, a tetrahedral arrangement of four distance measuring interferometers includes three interferometers positioned in a planar array above the measured surface and a fourth interferometer positioned at a central apex thereof.

Abstract: An optical code disc includes a fine track which provides a high resolution signal, at least one V scan natural binary track synchronized to the fine track by lead and lag detectors, and Gray code tracks which provide the most significant bits of the digital output of the encoder system. The number of circuit elements in the multiplier circuitry associated with the fine track are reduced by means of a quadrant switching technique whereby the sinusoidal inputs to the multiplier are repeated through each quadrant of the fine track cycle. The V scan and Gray code tracks are optically multiplexed to reduce the number of leads from the optical detector. The use of both V scan and Gray code tracks minimizes the number of detectors required in the system while maintaining large detector signals from each track. The V scan and Gray code outputs are synchronized by the use of an overlapping bit.

Abstract: An optical code disc includes a fine track which provides a high resolution signal, at least one V scan natural binary track synchronized to the fine track by lead and lag detectors, and Gray code tracks which provide the most significant bits of the digital output of the encoder system. The number of circuit elements in the multiplier circuitry associated with the fine track are reduced by means of a quadrant switching technique whereby the sinusoidal inputs to the multiplier are repeated through each quadrant of the fine track cycle. The V scan and Gray code tracks are optically multiplexed to reduce the number of leads from the optical detector. The use of both V scan and Gray code tracks minimizes the number of detectors required in the system while maintaining large detector signals from each track. The V scan and Gray code outputs are synchronized by the use of an overlapping bit.

Abstract: A relatively simple wavefront sensor is constructed with an astigmatic optical system which focuses an indicent wavefront to x and y focal planes, with the x and y focal planes being relatively displaced along the optical axis because of the astigmatic nature of the optical system. An x modulation reticle is positioned at the x focal plane, and an x drive tuning fork drives the x modulation reticle in linear oscillation at a frequency f.sub.x to modulate the wavefront thereat. A y modulation reticle is positioned at the y focal plane, and a y drive tuning fork drives the y modulation reticle in oscillation, substantially perpendicular to the direction of oscillation of the x modulation reticle, at a frequency f.sub.y, different from the frequency f.sub.x, to also modulate the wavefront thereat. A detector array then receives the modulated wavefront, with each detector in the array receiving and detecting a different zone of the incident wavefront.

Abstract: An incremental slope wavefront sensor having an optical system which focuses an incident wavefront to a focal point. A novel modulation reticle is positioned at the focal point, and is driven in linear oscillation along a single axis. The modulation reticle has a modulation pattern formed thereon by alternating triangular light transmissive areas and inverted triangular light reflective areas. A first detector array detects the wavefront which has passed through the transmissive areas and diverged from the focal point in a two dimensional array of zones. A second detector array detects the wavefront which has been reflected by the reflective areas and diverged from the focal point in a two dimensional array of zones. The output signals from the first and second detector arrays for each corresponding zone are differentially combined to form a differential output signal for each zone.