Abstract: A folded slab waveguide laser having a hybrid waveguide-unstable resonator cavity. Multiple slab waveguides of thickness ‘t’ supporting vertical waveguide modes are physically arranged above one another in a stack and optically arranged in series through one or more cavity folding assemblies with curved mirrors. A gain medium such as a gas is arranged in each slab. Each cavity folding assembly is designed to redirect the radiation beam emitted from one slab waveguide into the next waveguide and also at the same time to provide a focus for the radiation beam so that a selected vertical waveguide mode (or modes) is (or are) coupled efficiently into the next slab.

Abstract: A polygon tiling engine for use in a computer graphics display system. The computer graphics display system includes a high speed processor which provides lines of vertices, object type codes and START and STOP points for the vertex lines. The system further includes a VME bus. An improved apparatus for polygon tiling comprises apparatus for receiving the START and STOP points, instruction register apparatus coupled to the high speed processor for receiving instruction codes, object storing apparatus, a state machine for controlling the polygon tiling apparatus, a polygon address generating machine, a user defined object memory, a multiplexer and a triple buffered memory. Information is sent from the high speed processor to the tripled buffered memory, instruction registers and START and STOP registers. The information is processed into polygon addresses by the polygon generating apparatus. The polygon tiling apparatus is capable of tiling terrain data, multivertex polygons and user defined objects.

Abstract: A polygon sort engine including first and second apparatus for sorting. The first apparatus for sorting receives planar, externally convex polygon vertices from an external polygon tiling engine. This includes points and lines. The state machine on the second apparatus for sorting interfaces with the polygon tiling engine and a raster engine in a graphics pipeline. It provides a control signal which determines when the first apparatus for sorting will receive the next polygon. The second sorting appartus also controls whether the polygon is stored in the PING or PONG memory. For example, as the state machine is controlling the sorting of the current polygon into the PING RAM, the state machine will also be controlling the loading of the previous vertices and the PONG RAM into the raster engine.

Abstract: Apparatus for tramming the wheel and axle assemblies of railway trucks having sideframes and a transverse frame member supported on sideframes, the sideframes being supported at their ends on structures carried on the end portions of the axles, including a fixture having apertures defining the trammed positions of the journal boxes, vertical axis cylindrical apertures in the end portions of the sideframes adapted for general vertical alignment with the fixture apertures, cylindrical bushings rotatably mounted in the sideframe apertures and having off center internal apertures, pins rotatably mounted in the bushing internal apertures and having off center internal apertures, pins rotatably mounted in the bushing internal apertures and having an eccentric extension at their lower ends, whereby irrespective of misalignment of the sideframes, the pin extensions are alignable with and insertable in the fixture apertures, said bushings and pins being lockable in the resulting trammed positions and their eccentric e

Abstract: A railway vehicle truck in which the framing consists of sideframes resiliently supported at their ends on the axle bearings and a main frame supported on the sideframes by flat elastomeric pad devices inclined longitudinally of the truck and located at a substantially higher level than the levels of the neutral axes of the sideframe center portions and of the effective lateral reaction points of the resilient supports of the sideframes on the axles, the position and inclination of the pad devices being such that the horizontal component of the resultant force developed by each pad device on the respective sideframe lies along the neutral axis of the sideframe center portion whereby to place the center portion of the sideframe in tension rather than bending and thereby permit use of sideframes of extremely light construction, and separating lateral thrust means between the sideframes and main frame from the vertical springing function of the inclined pad devices to permit optimum placement of the lateral thru

Abstract: A railway motor truck has a pair of wheeled axles, the wheels having profiled treads to effect self-steering and the axles resiliently supporting a truck frame with sufficient yaw freedom to accommodate wheel-induced steering movements, and an interconnection between the axles, comprising a transverse shaft journaled in the truck frame intermediate the axles, normally substantially vertical levers affixed to the end portions of the shaft, and a pair of links respectively connecting the opposite ends of one axle to the upper and lower ends of the respective levers, and a second pair of links respectively connecting the opposite ends of the other axle to the opposite ends of the respective levers.

Abstract: A railway power truck has a rigid frame resiliently supported on its axles and intermediate its axles has a bolster supported on the sides of the rigid frame by longitudinally oppositely inclined elastomeric pads whose normals converge near rail level. At the sides of the truck, the bolster mounts springs which directly support the vehicle body and are yieldable horizontally as well as vertically to accommodate swivel and lateral movements of the body with respect to the truck.

Abstract: A railway vehicle, in particular a locomotive, has three or more trucks with the bolsters of each swivelly supported on the respective truck frames and having means for transmitting longitudinal traction and braking forces to the body underframe. The truck bolsters mount upright body-support spring devices which are yieldable in shear transversely of the locomotive to permit sufficient limited lateral movement of the body with respect to the trucks to prevent the full force of lateral blows and shocks received by the wheels from being communicated to the body and for preventing the momentum of the body from acting with its full lateral force on the truck wheels and rails.

Abstract: For supporting equipment which must be maintained at constant height above the rails, such as third rail collection gear, on inside bearing trucks in which the truck frame is spring-supported from journal boxes vertically movably mounted in downwardly open pedestal jaws in the truck frame side members, an equipment support beam extends longitudinally of the truck below the frame side members and the beam or pedestal legs are bifurcated at their ends to clear each other and the pedestal tie bars and the beam end portions are suspended from the bottoms of the respective journal boxes at each side of the truck, such that the equipment support beam is constantly maintained at a fixed distance above the rail whereby to maintain the supported equipment, including the third rail shoes, at a constant level with respect to the third rail.

Abstract: A railway vehicle truck has a rigid frame spring-supported at the ends of the frame side members on the journal boxes inboard of the wheels, with the central portion of the frame side members depressed to a lower level than the ends. A pair of center transoms are formed with extensions upwardly and outwardly of the side members adjacent the depressed center portions thereof, the outer extremities of the extensions being positioned outwardly of the wheels and pivotally supporting depending swing hangers. A spring plank supported from the lower ends of the swing hangers extends transversely of the truck through apertures in the depressed center portions of the frame side members, and springs carried by the outer ends of the spring planks support the ends of a bolster which extends outwardly over the frame side members.

Abstract: A radial axle railway truck has separate depressed center beam-type side frames mounted at their ends on journal bearing assemblies by means of elastomeric pad devices between downwardly facing surfaces on the side frames and upwardly facing surfaces on the bearing assemblies, the pad devices near the ends of the side frames being at a level higher than the axle centers and laterally inboard of the side frames and those remote from the ends of the side frames being at a level lower than the axle centers and laterally outboard of the side frames, thereby conforming with sloping end portions of the side frames and stabilizing the side frames against tipping transversely. The main frame of the truck has longitudinally extending side members and the side frames mount vertically acting resilient means for supporting the main frame on the side frames.

Abstract: A radial axle railway truck has a pair of depressed center side frames supported at their ends from the axles by horizontal elastomeric pad devices carried on the sides of outboard journal bearing adapters to permit steering movements of the axles, the horizontal pad devices nearest the ends of the side frames being elongated transversely of the truck and the horizontal pad devices remote from the ends of the sideframes being elongated longitudinally of the truck. A transverse truck frame is supported at each side above the depressed center portion of the respective side frames by a pair of generally V-shaped elastomeric pad devices supported on the inclined portions of the side frames connecting the high end portions and the depressed center portions thereof.

Abstract: A radial axle railway truck of the rigid frame type has an improved primary suspension for resiliently supporting the truck frame from the axles while permitting arcuate movements of the ends of the axles required to allow the axles to assume radial positions on curved track and an improved disc brake system arranged to minimize interference with wheel-induced steering movements of the axles. The primary suspension comprises journal bearing structures with fore and aft wings, a yoke supported on the wings by flat elastomeric pads yieldable horizontally to accommodate steering movements of the axles and chevron-shaped elastomeric springs carried on the yokes fore and aft of the respective journal boxes and acting in parallel with metal coil springs carried by the yokes.

Abstract: A railway truck has a pair of radial axles with journal bearings at their ends and an adaptor mounted on each journal bearing and arranged to support the truck framing for steering movements of the respective axles with respect thereto, rigid links connecting the diagonally opposite axle bearing adaptors via bifurcated yokes to accommodate horizontal turning movements in opposite senses of the respective axles, the adaptors being mounted on the axle bearings to permit limited relative movement of the axle bearings and of the respective axles transversely of the truck with respect to the adaptors, whereby to permit the respective axles, while held in parallelism by the diagonal links, to move transversely of the truck with respect to each other sufficiently to follow transverse offsets in the track rails such as may occur at turnouts and the like without placing excessive strains on the bearing adaptors and linkages.

Abstract: A radial axle railway truck is provided with a disc brake system compatible with the radial axles comprising a single disc at the center of each axle adapted to be frictionally engaged by opposing shoes of a disc brake mechanism, the disc brake mechanism associated with each axle being supported by a yoke anti-rotatably mounted solely on truck framing supporting adaptors mounted on the axle bearings to take braking torque while accommodating free pivoting movement of the brake mechanism in the horizontal plane in accordance with movements of the axles from their tangent track positions to their curved track radial positions, such that no forces are applied by the disc brake mechanisms to the respective axles in opposition to the steering forces acting on the respective axles.

Abstract: A railway locomotive has three power trucks with the end trucks each having a bolster resiliently supported on the truck frame and connected to the underframe by cooperating vertical axis pivot-forming means, the middle truck bolster being connected to the underframe by a Watts linkage arranged to directly transmit longitudinal forces from the bolster to the underframe while accommodating substantial excursions of the bolster and middle truck frame transversely of the locomotive underframe for operation of the locomotive on the curved track.

Abstract: A radial axle railway truck has a pair of wheel and axle assemblies with profiled wheel treads of greater than conventional conicity to steer the assemblies by means of the differential effect of the inner and outer wheel diameters on curved track, the axle bearings are located inboard of the wheels, and the truck frame side members are correspondingly located inboard of the wheels and there supported on the axle bearings such that longitudinally acting resilient restraint means between the axle bearings and the truck frame resist substantial movements of the axles longitudinally of the truck frame while offering only limited resistance as a couple to steering movements of the axles with respect to the truck frame because of the relatively short transverse moment arm between the longitudinally acting resilient means.

Abstract: A six-wheel railway motor truck for swivelly supporting a locomotive body is connected to the same for the effective transmission thereto of draft and braking forces at a level at or near that of the rail whereby the vertical moment arm through which traction forces might act to tip the truck frame and thereby cause load transference from axle to axle is minimized, with corresponding minimization of such load transference. The truck comprises a rigid frame resiliently supported on the three axles, a body support bolster supported on the sides of the truck frame by upright springs and held against swivelling movements or longitudinal movements with respect to the truck frame while being free for limited vertical and transverse movements with respect to the truck frame.

Abstract: A six-wheel railway motor truck for swivelly supporting a locomotive body is connected to the same for the effective transmission thereto of draft and braking forces at a level at or near that of the rail whereby the vertical moment arm through which traction forces might act to tip the truck frame and thereby cause load transference from axle to axle is minimized, with corresponding minimization of such load transference. The truck comprises a rigid frame resiliently supported on the three axles, a body support bolster supported on the frame fore and aft of the middle axle for swivel about a point on the longitudinal center line of the truck, the central portion of the bolster above the middle axle being open to provide unobstructed access to the middle axle motor and to provide vertical clearance therefor while maintaining the bolster and overall truck height relatively low.

Abstract: A six-wheel railway motor truck for swivelly supporting a locomotive body is connected to the same for the effective transmission thereto of draft and braking forces at a level at or near that of the rail whereby the vertical moment arm through which traction forces might act to tip the truck frame and thereby cause load transference from axle to axle is minimized, with corresponding minimization of such load transference. The truck comprises a rigid frame resiliently supported on the three axles, a body support bolster comprising longitudinally spaced transversely extending end members and transversely spaced longitudinally extending side members defining an open central portion above the middle axle for providing unobstructed access to the middle axle motor and sufficient vertical clearance therefor while maintaining the bolster and overall truck height relatively low.