Abstract: A machine for routing end portions of frame pieces produces a channel that extends with increasing spacing from the bevelled face of the frame piece. Structure on the machine supports the frame piece in a plane that converges toward the plane in which the router bit lies, and cutting is carried out by effecting either curvilinear or rectilinear relative movement of the router and the frame piece or pieces.

Abstract: An acrylate encapsulation formulation reacts at a high rate of speed, when exposed to radiation inclusive of wavelengths in the ultraviolet and the visible range, to initially produce a relatively thick skin and to ultimately cure to a relatively low-stress deposit having good physical definition and surface properties. The method entails exposure of the formulation, on an object, to radiation for initialing photopolymerization and thermal polymerization, and the apparatus includes closely juxtaposed actinic radiation and thermal energy sources.

Abstract: A moving mirror interferometer consists of a back-to-back double mirror, operatively interposed in the paths of beams from a beamsplitter/parallel reflecting mirror combiner, and a corner cube retroreflector. One beam component from the combiner is directed toward the retroreflector, and arrives therefrom at one side of the double mirror rotated 180.degree. about its central axis; the other component from the combiner arrives at the opposite side of the double mirror without axial rotation. Alignment in the interferometer is insensitive to shearing or tilting of the optical components; the components may be semi-rigidly mounted for resilient deflection, so as to isolate them against distortion of the supporting structure, and dynamic beam path-length variation may optimally be produced by moving the corner cube retroreflector, the back-to-back double mirror, or both.

Abstract: An acrylate encapsulation formulation reacts at a high rate of speed, when exposed to radiation inclusive of wave-lengths in the ultraviolet and the visible range, to initially produce a relatively thick skin and to ultimately cure to a relatively low-stress deposit having good physical definition and surface properties. The method entails exposure of the formulation, on an object, to radiation for initialing photopolymerization and thermal polymerization, and the apparatus includes closely juxtaposed actinic radiation and thermal energy sources.

Abstract: A base station includes a tuner and teletext decoder 32 which outputs baseband video, audio and raw text data at 36, 37 and 39, along a cabling infrastructure 40. A remote PC 41 has a capture card to receive and display the video picture and assemble the text data into a picture which is stored and displayed as required. The PC also displays a control application window which, by pointing and clicking with a mouse 45, allows control signals to be sent to the tuner 32 to select channels and pages via a microcontroller 34. The text information is subjected to an error checking and re-transmission protocol at the PC.

Abstract: A fiber bundle workpiece is coated with a particulate material during passage about a plurality of pulleys arranged to establish a serpentine travel path portion through a coating zone. The pulleys have arcuate grooves extending thereabout, which cause the fiber bundle to twist axially, and the fibers of the bundle move with respect to one another as the fiber bundle moves along the serpentine path. These two actions increase coating efficiency and the penetration of particulate material into the fiber bundle. The travel path portion will preferably lie in a horizontal plane, and the coating unit will normally constitute an electrostatic fluidized bed of particulate material. After exiting the coating zone, the fiber bundle may pass through an oven to partially melt the particulate material, and thereby cause the particles to adhesively attach to the fiber bundle.

Abstract: Apparatus for drying a wet material such as sewage sludge comprises a drum (11) mounted for revolution about a horizontal axis and containing interconnected inner (22) and outer (21) concentric spirals containing a continuously-recirculatable charge of particulate heat exchange/pulverizing medium in each coil of the spirals. Sludge is introduced at one end and mixed with the heated charge; the charge and sludge traverse the length of the drum together through the outer spiral while drying takes place; the dried material is removed at the other end and the charge transferred to the inner spiral for transmission to the first end while re-heating takes place by ducted heated air.

Abstract: A refrigerated icebox employs a cabinet that is internally corrugated to provide a multiplicity of lengthwise channels for air flow within the enclosure defined. The cabinet has a top wall that is provided with an opening to accommodate a drop-in refrigeration unit, and it is, in the main, integrally formed as a single piece.

Abstract: The method determines the thickness and the free carrier concentration of at least one layer of a structure. An exposed surface of the structure is irradiated using spectral radiation, and the measured reflectance spectrum is compared to a calculated spectrum. Using algorithms that include terms representative of complex refractive indices, layer thickness, dielectric constants, and free carrier concentrations, values are iteratively assigned to the thickness and free carrier concentration parameters so as to produce a best fit relationship between the compared spectra, and to thereby determine those parameters.

Abstract: The disc screw extruder employs a free-floating operating member that is so constructed as to attain substantially stable axial positions within the extruder chamber. The disc component cooperates with confronting surfaces to define inner and outer throat zones, extending along the lead-in and lead-out sections of the disc component, the thicknesses of the flow paths through both of the throat zones decreasing in the outward direction of the extruder.

Abstract: A fault-indicating blade fuse includes a light-emitting electrical device that is positioned for ready visibility from above the fuse. The device lies within the bounds of the upper body profile of the fuse, and is so constructed and connected as to be activated upon fusion of the link, when the fuse is subjected to excessive current. In one form, a supplemental component contains a light-emitting electrical device and includes means for affixing it to the upper body portion of a fuse. Contact elements on the supplemental component establish electrical contact with the blades of the assembled fuse.

Abstract: The structure of the invention serves to support mirrors defining a reflective channel, which can dynamically be reciprocally widened and narrowed, as in a two-beam interferometer. It is effectively divided, by pivot points on an intermedial axis, into two opposite portions of equal mass, thus affording to the structure immunization against translational forces transmitted through those points. The opposite portions also have their centers of gravity remotely located, so as to generate a counteracting torque in response to moments of rotational inertia transmitted through the pivot points. In the structure, integrally formed planar pieces are assembled to provide contiguous elongate elements and an interposed connecting web element, a plurality of which web elements produce a flexure joint.

Abstract: A nasal packing article, made from a material that is expansible when wetted, is formed with a plurality of laminae that are independently movable and separable from one another, and that expand to effectively exert hemostatic pressure. The article may comprise an assembly of layers interengaged in face-to-face contact, or it may be defined by slits that extend entirely through the thickness or width of the body but terminate short of one end, to leave the laminae connected thereat.

Abstract: Air drawn in by a fan 4 is cooled by evaporator coils 2 and re-warmed by a condenser 3. A microcontroller MC and sensor S reads the temperature of the incoming air at regular intervals, e.g. once every minute, and controls a compressor 1 to operates in successive run periods, during which the evaporator 2 removes moisture from the air, separated by defrost periods in which the compressor is switched off so that warm incoming air melts any ice on the evaporator. The temperature at the start of a run period determines the duration of the respective run period, and the temperature at the end of a run period determines the length of the following defrost period. The length of the run period is constant at low temperatures but increases to a longer constant period at higher temperatures. The length of the defrost period is a maximum close to freezing point, but is reduced by decreasing increments as air temperature increases. At higher temperatures the dehumidifier operates continuously with no defrost.