Abstract: A selectively usable particle collector for recovering precious metals in clean condition during use of dental suction apparatus is shown. A reservoir where particles are deposited has a closure cap with ports to one of which can be removably attached a replaceable pick up tube to be inserted in the patient's mouth; the other is adapted to removably receive a flexible hose leading to a vacuum source both ports being in communication with the reservoir. In another embodiment a portion of the cap can be rotated to selectively effect either direct communication from the pick up tube to the flexible hose or through the reservoir. A metering vent is provided to regulate vacuum pressure.

Abstract: There is described the combination of a connector, which is an elongate element having parallel side faces and penetrated by a bore perpendicular to the side faces, and a pivot pin which is, in use, received in the bore and protrudes from both ends thereof, the pivot pin being retained in the bore by means of a resiliently supported projection extending either radially into the bore or radially outwardly from the pin, the resilient projection engaging the side walls of either a groove formed in the pin, or of a recess formed in the connector and communicating with the bore. The connector is situated, in use, in an elongate opening in a wiper blade harness, parallel side walls of the opening being formed with holes into which the ends of the pin project to mount the connector pivotally to the wiper blade harness, and the connector is adapted to engage and retain an end of a windscreen wiper arm to effect a pivotal connection between the arm and the blade harness.

Abstract: A windshield wiper arm includes a free end which is U-shaped in cross section to form depending ears. The ears include slots open at the free end and detents adjacent the rear edges. The depending ears are received in an opening of the web of the central portion of a channel shaped blade and straddle a flat leaf spring. The open ended slots engage a cross pin extending through the webs of the blade and the detents engage the underside of the flat leaf spring to limit angular displacement of the blade relative to the arm. A pair of shoulders formed on the inner surfaces of the side walls of the blades engage the rear edge of the depending ears to restrict longitudinal movement of the arm relative to the blade.

Abstract: In a safety razor the blade is retained in a manner to permit limited movement relative to the handle in the direction of its longitudinal axis. This is accomplished with blade elements of the type comprising a blade mounted in a cartridge by retaining the blade cartridge in its receptor for movement relative to the receptor. In other embodiments, the receptor is mounted on the handle in a manner to permit limited movement of the handle in the direction of the longitudinal axis of the receptor. The latter embodiment may be employed with any safety razor having its handle positioned in angular relationship to the receptor. To enhance the relative sliding movement, a lubricant may be applied between the moving parts.

Abstract: A windscreen wiper blade harness comprising a plurality of metal yokes of channel cross section having at least one secondary yoke nested within and pivotally secured to primary yoke adjacent its end includes a plastic spacer of channel cross section disposed between the primary and secondary yokes for preventing metal to metal contact and providing the pivotal connection, the spacer being formed with a pair of internally extending aligned trunnions, one on each cheek which pivotally engage corresponding holes in the flanges of the secondary yoke, externally extending projections aligned with the internal trunnions which engage in corresponding holes in the flanges of the primary yoke and a radially extending flange which abuts the end of the primary yoke.

Abstract: A wiper blade refill assembly for replacement in a wiper blade pressure distributing superstructure includes a combination of an elastomeric wiping element supported by an elongate backing element and a set of adapter clips having depending pairs of opposed adapter claws spaced apart a distance sufficient to slidably accommodate the backing element of the replacement refill unit. The adapter clips include a pair of spaced apart resilient arms having notches at their side edges in which the claws of the superstructure are seated and retained. The backing element is notched on a side edge to resiliently engage and retain an adapter claw.

Abstract: A ball socket member open at one end is formed of yieldable semi-rigid plastic material, with external ears and internal axially extending lubrication distribution and relief slots positioned in alignment with the ears. The slots terminate at the open edge, the lubricant being retained by a closed cell seal of cellular material. An external circumferential groove receives the periphery of an opening in a linkage member, the external ears being received in key slots in the opening. The periphery of the opening is deformed out of the plane of the surface of the linkage to produce an effective thickness approximately the thickness of the groove, providing a method and construction to assure a secure fit in cases where the thickness of the linkage material is either greater than or less than the width of the groove.

Abstract: A fuel control system for a diesel engine comprises a fuel pump with a fuel control member and an excess fuel member. A reversible electric motor drives a rotary member which cooperates with these two members. The driver can control a switch to "stop" and "run". A heat-sensitive switch on the engine responds to "cold" or "hot". An electric circuit causes the engine when cold to start with automatic transient actuation of the excess fuel member.

Abstract: An articulated windshield wiper blade superstructure for distributing applied pressure proportionately along the length of a wiper blade which includes a central primary lever and a pair of secondary end levers arranged end to end. The end levers are pivotally connected to the central levers. A single flat spring extends from end to end through the central lever. At each end it engages a projection on the end levers which extends inwardly of the pivotal connection. The spring functions to distribute the arm pressure to the end levers and also functions as a latch to retain the blade on the arm.

Abstract: A brush support combination is provided for dynamo-electric machines in which brushes are continuously urged against a commutator or slip ring. Each brush is carried by a brush arm which is in turn supported on a lead terminal of the machine. The lead terminals may be supported on an open ended motor housing or on an end cap which closes the open ended housing. The brush arm is formed of electrically conductive, flat resilient stock which supports a brush at one end. The other end is formed into a bight, the free end of which projects outwardly. The bight extends through an opening in the lead terminal, entry to which may be achieved through a throat communicating with the opening. In use the bight resiliently engages the edges defining the opening to retain the brush arm and to provide electrical contact with the terminal.

Abstract: A pair of molded plastic components are juxtaposed face to face to form a body, U-shaped in longitudinal cross section on a plane perpendicular to the juxtaposed faces and include flanges on the sides thereof. The external shape of the assembled body fits into a U-shaped space defined by the end of a wiper arm of the "shepherd's crook kind". The juxtaposed faces each have formed therein a transverse semi-cylindrical recess. When the sections are arranged face to face the recesses form a transverse bore to contain a grooved pin extending transversely from the side of a wiper blade harness. An internal circumferential projection in the recesses engages the groove in the pin; the flanges engage the side edges of the arm. A pair of resilient detents projecting outwardly from the web portion of the U-shaped body engage the web of the shepherd's crook arm.

Abstract: A material visually changeable with changing temperature is incorporated internally in a transparent solid body having physical dimensions and thermal conductivity and diffusivity characteristics selected to provide a thermal analog of an object. The object and its analog are exposed to equivalent ambient conditions, concurrently, resulting in a visible change in the thermal analog corresponding to the internal temperature change in the object. The temperature indicating material may include a single transition temperature or multiple temperature indicating materials may be incorporated to display a plurality of transition temperatures and may be reversible or irreversible.

Abstract: An articulated windshield wiper blade superstructure for distributing applied pressure proportionately along the length of a wiper blade which includes a central primary lever and a pair of secondary end levers arranged end to end. The end levers are pivotally connected to the central levers. A single flat spring extends from end to end through the central lever. At each end it engages a projection on the end levers which extends inwardly of the pivotal connection. The spring functions to distribute the arm pressure to the end levers and also functions as a latch to retain the blade on the arm.

Abstract: Apparatus for concentrating an aqueous solution of higher boiling point organic antifreeze medium includes a casing having a first and second upright legs connected by a third inclined leg. The first leg is open at the upper end to provide an ambient air inlet and includes a spray discharge nozzle, heating coils, an extended evaporation surface and a sump vertically disposed with respect to each other. The second leg constitutes a multistage reflex chamber having a plurality of alternately disposed reflex cooling coils and reclaiming screens of glass fiber cloth, each screen formed in a plurality of zigzag stretches. The third leg connects the first and second legs and is inclined downwardly from the second casing to the first casing to permit migration of liquid to the sump. A pump and conduits are provided to supply liquid from the sump to the discharge nozzle.

Abstract: Sensing devices responsive to changes in the physical condition of the area in which they are located are disposed in elongate, flexible carriers to form a detecting unit which can be arranged in a tortuous, undulating array to cover an undefined area of any shape desired with a detecting density of any chosen value. The detecting unit can assume various forms including that of a pair of conducting elements disposed within an insulating tube in opposed relation positioned to complete the continuity of a switching circuit when the tube is flexed to cause engagement of the conductors. Another embodiment comprises a plurality of braided strands of insulating material extending lengthwise within an insulating carrier cable sheath. A pair of conductors is included in the braiding in a spiral disposition with each conductor being disposed along the entire length in opposed relation to the other conductor.

Abstract: A side mounting wiper blade is attached to a "shepherd's crook" wiper arm by means of an adaptor. The adaptor comprises a body shaped to fit against the arm and to receive the lateral pin of the wiper blade, and a single releasable latch member serving to lock the body to the pin and to the arm.

Abstract: A superstructure for a windshield wiper blade assembly includes a pair of primary levers connected together by a spring hinge which urges the outer ends of the levers toward the superstructure. A third lever is pivoted at the transverse hinged axis. The primary levers are tubular in cross section for substantially their entire length and have integrally formed wiping element receiving claws at their outboard ends. The inboard ends are formed with an integral web and depending apertured ears, the web and ears forming a spring retainer, the ears being interfittable and having their apertures aligned to receive a transverse hinge pin.

Abstract: A dual purpose blade and a shield are pivotally supported on a transverse axis on a hollow handle for pivotal movement from a nested position within the handle to a fully open position at an obtuse angle to the handle. The shield is independently movable relative to the blade. One longitudinal edge of the blade is an extremely sharp cutting edge, the other longitudinal edge being a scraping edge. The free end of the shield when disposed in nested relation with the blade forms a concave curvature at its free end to conform to the shape of a rib cage of a fish. The lateral surface of the combined shield and blade is a smooth concavity having its axis in a direction parallel to the longitudinal axis of the blade. The concavity at the free end of the shield has sharp edges at its junctions with the lateral surfaces of the shield to provide a scraping edge to shear the fish meat from the rib cage.