Abstract: A progressive action, full extension drawer guide which allows drawers to open completely, has first and second rails with recessed nesting portions and ball bearings therebetween for gliding of the second rail with respect to the first rail, and a third rail with roller guide means which fits within the recessed portion of the second rail. A friction roller is mounted for rotation on the second or middle rail and contacts tracks on the first and third rails to move the second rail progressively one-half the distance of movement between the first and third rails. Novel stops are provided to stop the movement of the first rail with respect to the second rail and to stop the movement of the second rail with respect to the third rail when the drawer is fully extended. The drawer guide is very compact so that it can be used on relatively shallow drawers.

Abstract: A self-supporting macrame assembly holder for hanging macrame at a variety of adjustable vertical positions while it is being completed comprises a frame that is sufficiently high to permit a person to sit on a chair under the frame and a line and pulley suspension mechanism for hanging the macrame from the frame. The frame includes a crown including a front section and a transverse section extending perpendicularly from the front section. Two front legs of the frame are pivotally mounted to the front section and a rear leg is pivotally mounted to the transverse section. The front legs are extendible in telescopic fashion, and the rear leg includes an L-joint which permits an upper portion of the leg to be placed in a variety of angular positions with respect to the lower portion of the leg. Macrame is suspended from one end of the line; the other end of the line can be attached to the frame in a variety of positions along the chain in order to raise and lower the macrame with respect to the frame.

Abstract: Code circuitry for controlling the operation of a vehicle that is guided along a guide line by means of a vehicle guidance mechanism comprises a plurality of code markers positioned in a code marker path alongside the guide line, a sensor circuit that senses the intensity of radiation received from the guide line and code marker path and generates a code signal whenever the radiation from the code marker path increases to a predetermined proportion of the intensity of the radiation received from the guide line, and a control mechanism that controls the operation of the vehicle in response to code signals generated by the sensor circuit. A gain control feedback mechanism provides gain adjustment for wide variations in guide line and code marker intensity, and modulation circuitry eliminates the effect of static background radiation.

Abstract: A totally subcutaneous arterio-venous valved shunt, wherein no elements of the shunt are exposed supracutaneously, comprises a curved tubular shunt extending between an artery and a vein in a patient, with a pair of valves subcutaneously mounted in outlets in the shunt. The valves open and close fluid passages to the interior of the shunt upon axial movement of valve members. In use, a hollow needle is inserted through the patient's skin and mounted in an outlet opening in each valve member. The valve member is moved axially by the needle to open and close the valve and provide access to the blood flowing through the shunt. In a dialysis operation, blood is diverted to flow out of one (arterial) valve, through the dialyzer, and back through another (venous) valve of the subcutaneous shunt into the patient. Alternatively, one valve can be used for both outflow and inflow. On completion of dialysis, the valves are closed and the arterial and venous needles are withdrawn from the patient.

Abstract: An apparatus to vary the degree which a door may be opened and held in place. An operating arm of the door holder is pivotably mounted to a slide which is mounted within a slide channel. Holding means releasably hold the slide at a fixed position within the slide channel. The other end of the operating arm is pivotably mounted to an adjustable bracket. The bracket is seated within a track and is capable of adjustable movement along the track. Fastening means secure the bracket with respect to the track in a plurality of fixed positions.

Abstract: A two-piece panel molding having an L-shaped base which is attached to a support through a foamed adhesive tape. The base has an upright retaining flange at one side to abut a marginal facing edge on a panel and a slot at an opposite side. The thickness of the base is substantial to comfortably accommodate the slot and to provide rigid support therefor. A plurality of upwardly opening channels are formed in the base. A retainer has a panel retaining means to abut an opposite facing edge of the panel and has a locking flange which fits within the slot of the base. Means, for example, complementary serrated edges in the locking flange and the slot, retain the locking flange adjustably within the slot. The panel engaging retaining means can comprise a single flange to retain a thick panel or a lateral web with one or more depending flanges to retain thinner panels.

Abstract: A light splitter device adapted for use in a light-sensitive sorting machine comprising a multiplicity of optical fibers adjacent ends of which extend from a common surface, the opposite ends of the fibers being disposed in a plurality of separate groups of fibers which are respectively adapted to illuminate different light sensors, the fibers of each group respectively extending from regions distributed substantially uniformly throughout the said common surface.

Abstract: Sorting of bicarbonate containing ore particles from oil containing ore particles in a mixture of the two types of ore particles by treating the surface of the mixture with an aqueous medium and thereafter subjecting the ore particles, while wet, to microwave energy to heat the surface of the particles sufficiently to whiten the color of the bicarbonate containing particles and thereafter optically sorting the particles according to color.

Abstract: A sorting machine comprising a vertically inclined feed bed, a feeder for feeding objects to be sorted to an upper portion of said feed bed, the feed bed being adapted to be supplied with a fluid which fluidizes the objects thereon so that the latter flow to a lower portion of the feed bed, and a sorting arrangement which is arranged to receive the objects from the said lower portion and to separate them into groups of desired and undesired objects respectively.

Abstract: A suspended ceiling construction comprises a plurality of individual ceiling tiles suspended in rows between evenly spaced support beams. Each tile has a kerfed back edge that fits over a flange on a back support beam and an L-shaped front portion having a lower lip that fits under a flange on a front support beam. The side edges of each ceiling tile include longitudinal kerfs therein extending rearwardly from the front portion of the tile, with the kerfs being positioned above the lip on the front portion of the tile by a distance at least equal to the thickness of the flange on the front support beam. Tile supporting splines fit into the kerfs in the sides of abutting ceiling tiles and engage the front support beams. At least one of the ceiling tiles is an access tile and comprises cut away portions above the kerfs on each side of the tile. The splines include a movable member slidable from a locking position, engaging the kerfs at the side edges of the tiles, to a release position at the cut away section.

Abstract: Cruise control apparatus for releasably holding a hand grip throttle at any given throttle position comprises a fixed position slip ring slidably riding around the outer periphery of a collar securely fastened to a rotatable hand grip throttle control. The slip ring comprises an open section with tabs extending from opposed ends of the slip ring facing the open section. A thumb actuated cam lever is employed to selectively squeeze the tabs of the slip ring together so as to clamp the slip ring on the periphery of the secured collar and hold the throttle in any desired position. The cam lever is easily released to effect immediate release of the cruise control whenever manual control is desired.

Abstract: A floor finish applicator comprises a frame mounted on wheels for movement in any selected direction, a liquid finish storage tank mounted on the frame, a finish applying mechanism adapted to deliver finish from the outlet of the storage tank to the floor, and a finish spreader adapted to spread the finish out into a smooth even finish after it has been applied to the floor. The finish spreader is mounted behind the frame and is movable in a transverse direction with respect to the direction of movement of the frame. The finish spreader is resiliently biased to remain in a predetermined position but is mechanically movable in either transverse direction. A roller is provided at one or both ends of the spreader in order to provide a rolling contact between the finish spreader and the wall of a room being finished. The applicator may be used to apply any type of liquid to a floor, including waxes, varnishes, cleaners or the like.

Abstract: A high speed circular saw blade exhibiting low operating noise characteristics comprises a plurality of narrow expansion slots up to about 3/32 inches wide formed in the outer edge of the blade at a negative angle of about 5.degree.-15.degree. with respect to a line extending radially from the center of the blade to the slots. Two to five slots are provided in each blade, with the depth of each slot being between about 3/4 to 21/2 inches, depending on the diameter of the blade. Expansion holes are provided at the bottom of each slot, and a further reduction in noise level is achieved by plugging these holes with a resilient material such as solder or the like.

Abstract: A heat exchanger and mounting structure therefor for use in connection with incinerators, for example, the heat exchanger formed of a ceramic wheel with a central core and an annular portion with gas passages extending axially therethrough. The ceramic wheel is mounted at the central core with a mounting means which comprises first and second wedge members in abutting relationship with opposite sides of the core. Means bias the wedge members towards each other so that the core is resiliently held under compression between the two wedge members to eliminate tension stresses on the ceramic wheel due to thermal expansion differences between the ceramic wheel and the mounting structure therefor. The mounting structure includes a first shaft secured to the first wedge member and a second shaft, tubular in shape and concentrically mounted on the first shaft, the second shaft being secured to the second wedge member. The shafts are supported on the cool side of the heat exchanger wheel by a pair of bearings.

Abstract: A heat exchanger and mounting structure therefor for use in connection with incinerators, for example, the heat exchanger formed of a ceramic wheel with a central core and an annular portion with gas passages extending axially therethrough. The ceramic wheel is mounted at the central core with a mounting means which comprises first and second wedge members in abutting relationship with opposite sides of the core. Means bias the wedge members towards each other so that the core is resiliently held substantially under compression between the two wedge members to eliminate tension stresses on the ceramic wheel due to thermal expansion differences between the ceramic wheel and the mounting structure therefor. The mounting structure includes a first shaft secured to the first wedge member and a second shaft, tubular in shape and concentrically mounted on the first shaft, the second shaft being secured to the second wedge member.

Abstract: Adjustable hanger strap for hanging pipe or pipelike structure or wire bundles or cables from the underside of rafters or ceilings or other convenient locations. The adjustable hanger strap comprises a flat elongated strip of a flexible material such as a plastic material and has a retainer with a slotted aperture at one end thereof through which the other end of the strip may be passed to form a loop. The strip is provided along the length thereof with a series of holes surrounded by protuberances which strengthen the holes and in addition releasably retain the passage of the strip through the aperture so that the strip is retained in a loop form in a position around the pipe or wire bundles. Nails may be driven through the holes in the free end portion of the strip for securing the structure to rafters or other such support.

Abstract: A respiration system for weaning patients from a respirator wherein a mandatory ventilation assist is provided to the patient upon inspiration after predetermined time intervals. A sensitivity mechanism for sensing inspiration by the patient and for actuating the mandatory ventilation assist is desensitized or rendered inoperative during a predetermined time interval in which the patient will be required to breathe normally without assist. At the end of the time interval, the sensitivity mechanism is again rendered operative for the mandatory ventilation assist. In the event that the patient does not trigger the sensitivity mechanism within a second given period of time following the end of the time interval, a mandatory ventilation assist is provided.

Abstract: A vehicle guidance mechanism for guiding a vehicle along a guide line comprises a radiation source that causes the guide line to reflect or emit a guidance signal; photocell sensors mounted in the vehicle and adapted to sense the guidance signal and produce an error output signal proportional to the variation of vehicle position from a predetermined lateral position with respect to the guide line; and a control device in the vehicle adapted to steer the vehicle in response to the error signal so as to cause the vehicle to follow the guide line. An automatic contrast or gain control circuit eliminates the effect of background illumination in the output signal received from the guide line. Modulation circuitry and appropriate filters reduce the effects of static background illumination and improve the reliability and line detecting ability of the guide system. Line detection circuitry is employed to prevent operation of the automatic control device unless the vehicle is tracking a valid guide line.

Abstract: A trolling brake for a motor powered boat to enable the boat to move at varying slow speeds while the motor is running at idle without stalling the motor. The trolling brake is formed of a semicircular shield having a pair of forward ends pivotably mounted on the transom of the boat at or near the waterline and an adjustable support pivotably mounted at a rear portion of the shield and to the transom of the boat for adjusting the position of the shield in the water. The bottom edge of the shield slopes downwardly and rearwardly from the ends to a rear central portion and the shield has a pair of holes equidistant from the centerline of shield rear central portion to permit the passage of a controlled amount of water through the shield to facilitate steering of the boat with the shield in operative position. The center of curvature of the shield is substantially at the pivot point of the out-drive portion of an inboard-outboard motor and at the center of the craft when the boat has an inboard motor or motors.

Abstract: A protective coating composition for application to decorative surfaces and the like, the coating composition comprising a solution of a polymerized haloethylene and an organic solvent therefor, the solution being finely dispersed in a diluent in such proportions so that the solution is evenly and thinly spread onto surfaces when sprayed thereon and in such proportions insufficient to cause settling of the polymer solution in a relatively short period of time following gentle agitation. The diluent is volatile for rapid evaporation and comprises, for example, a polyhalogenated hydrocarbon having one to four carbon atoms as, for example, trichloroethane. The coating composition can be mixed with an aerosol and sprayed from an aerosol container onto the surface so that the composition visibly covers the surface to be protected. The composition is then dried to evaporate the diluent and the solvent for the polymer, leaving a white dust-like film on the surface.