Abstract: A syringe for collecting a blood sample includes a cylindrical housing having a hollow needle at one end. A plunger slidably mounted within the housing defines a chamber within which blood collected by the needle is received. A hydrophilic bypass element disposed between the rim of the plunger and the inside surface of the housing forms a passageway through which air is exhausted as blood enters the chamber under arterial pressure. The passageway is automatically closed to prevent leakage from the chamber when the chamber becomes filled with blood and the bypass element is wetted. An alternate embodiment wherein the hydrophilic bypass element is in the form of an annular sleeve extending around the rim of the plunger is shown.
Abstract: A container for a maintenance-free lead-acid storage battery includes a multi-compartment base wherein individual cells of the battery are contained. An overlying cover in vapor-sealed engagement with the base includes a plurality of integrally-molded filler wells which extend from a recess in the top surface of the cover into respective cell compartments of the battery. A one-piece molded vent cover seated within the recess includes a plurality of vent plug portions which extend through the filler wells into respective ones of the cell compartments. An annular flange associated with each filler well coacts with ribs on the vent plug portions to lock the vent cover in place.
Abstract: An improved photosensitive resin system being essentially solvent-free which contains an ester produced from an unsaturated organic acid and a polyhydroxyl containing material, a photoinitiator, a carbonyl initiator, and a monomer capable of reacting with an acrylic monomer, wherein an improvement comprises an additional component comprising an unsaturated hydroxyl containing polymer hydrocarbon. The improved composition has curing rates far in excess of those systems not using the hydroxyl containing unsaturated polymer. In particular, the advantages obtained through the use of the additional component are much faster curing of the composition, exceptional gloss, toughness, abrasion resistance and good rub resistance.
Abstract: Presensitized lithographic plates having a diazo layer are prepared such that they exhibit a photospeed rendering them suitable for ultra high speed operations including use within laser platemaking systems. These ultra high speed plates have a diazo layer that is exceedingly thin while still being generally uniformly distributed throughout the plate area. The process includes extracting a significant quantity of diazonium compound or diazonium resin from a diazo layer on a presensitized plate substrate. Plates thus formed are useful in laser exposures for facsimile transmissions, as projection plates, as camera back plates, for step and repeat plate work, and where low intensity light sources are used in conjunction with very large plates.
Abstract: A V-belt measuring device is provided for directly determining the size of a V-belt needed for a particular belt-drive mechanical system without the need for subsequent calculations. The measuring device is substantially complimentary in cross-section to the generally V-shaped grooves in the pulleys of the belt-drive system, and includes a bevelled end portion and a central contact portion which cooperate while tension is applied to the device to directly indicate a proper replacement belt size.
Abstract: Provided is an improved rear view or rear vision mirror for passenger automobiles, vans and like vehicles, exclusive of buses or trucks larger than pick-up trucks, which mirror affords a wide-angle view well beyond the statutory requirement that outside mirrors give a view of the side of the vehicle through a 10.degree. angle beyond such side of the vehicle to the extent that the image covers the so-called "blind spot" beyond the 10.degree. view path. The improved mirror avoids the use of spherical reflective surfaces and consists essentially of a single substantially planar reflective surface and a single contoured reflective surface that is a generally convex cylindrically contoured surface having a radius of curvature within a critical range of values.
Abstract: A photopolymerizable coating over a diazo resin provides a high-speed lithographic plate or photoresist while improving the printing life of the plate while making its development simpler than that of most other photopolymer plates. The photopolymer is a cinnamoylated polyvinyl alcohol resin which is placed over a diazo based material.
Abstract: A method and apparatus for electro-polishing surfaces of metal objects, which is immersionless and containerless, includes a simplified frame, a cathode mounted on the frame and adapted to be positioned a predetermined distance from the surface to be polished, and a sheet of liquid-retaining material positioned between the cathode and the surface to be polished. When the cathode is negatively charged, the anode is positively charged, and electrolytic bath is introduced to the liquid-retaining material, a circuit is completed between the cathode and anode and an electro-polishing action takes place on the anode. This material retains the electrolyte and allows the gases generated to escape. Various portable adaptations of the invention enhance its use for specific polishing operations.
Abstract: A supply of cheese having residual whey thereon is rinsed with water containing a blandness imparting component selected from the group consisting of iron gluconate, copper gluconate and blends thereof.
Abstract: During blending of whey there is added a metal gluconate solution, to give the whey a bland odor and taste, as well as a colloid enhancer component to impart a colloidal type condition to the whey. Thereafter, a floc initiator may be added to separate the whey into a solids fraction floc and a liquid fraction. Also disclosed is a gelatin containing a bland and colloidal type whey, a gel inducer and a bland soy protein liquid.
Abstract: Bag holding and supporting apparatus for holding and supporting a bag, especially of the flexible-walled plastic-film type, in an open and upright position for more convenient and efficient placement of articles or merchandise in the bag. The holding and supporting apparatus is situated adjacent a generally horizontal surface on which the bottom of the bag rests and the bag holder resiliently engages an upper sidewall portion of the bag near the top open end. An upright member has a base at the lower end for securing the apparatus relative to the horizontal surface. The upright member includes two portions in telescoping relationship to accommodate different height bags. A supporting head is attached to the upper end of the upright member and is of modified R-shape in cross section with opposing sides of the R-shape adapted to resiliently engage the sidewall of the bag for ease of insertion and removal of the bag from the head.
Abstract: Ion exchange techniques are utilized to treat waste water flows, especially those from plating baths, by passing the waste water through a multi-level ion exchange resin bed, the bed thereafter being regenerated by a series of steps, including backwashing, passage of an acidic regeneration fluid through the bed, multi-stage rinsing of the bed, and passage of a caustic regeneration fluid through at least a portion of the bed. Acidic waste flows developed during regeneration steps are, when desired, further treated to recover cyanide values therefrom by heating same within a generally closed tank to drive off a hydrocyanic gas, which is then reacted with caustic within a circulation reactor having an inclined passageway in order to form and recover a cyanide salt liquor suitable for re-use in the plating bath.
Abstract: Disposed between the positive electrode and the negative electrode in addition to the separator layer is an electrolyte-impermeable inert film or foil about 5 to 50 microns thick. The film or foil includes a very small current-focusing aperture produced by piercing, punching, or melting. The entire electrolytic current is focused through this aperture. The area of the aperture is at least ten times smaller than the surface area of the separator layer. The thickness l of the film or foil and the radius r.sub.i of the aperture are governed by the relationship 4l/r.sub.i .ltoreq.10. The electrolyte-impermeable film or foil is sealingly clamped between the positive electrode and a sealing ring at the edge of the cell. The film or foil may be of a synthetic resin polymer material, of nickel, or of a nickel alloy. Self-discharge is decreased by the construction of the cell. The cell may be in a flat form without any appreciable decrease in the energy density taking place.
Abstract: In casting tubular-plate grids, a molten lead alloy is poured into a mold along the long side of the grid perpendicular to the grid rods. Temporary connectors joining adjacent grid rods are simultaneously cast. These connecting portions have a thickened cross-section in the middle and a constricted cross-section at their points of junction with the grid rods. In a subsequent operation, the connecting portions are punched out.
Abstract: A snow assembly for conversion, for snow operation, of a normally road operable vehicle includes ski and track assemblies which are adapted to be mounted on the vehicle in place of the tires normally mounted thereon for road operation. The ski assembly includes a raise bracket which is mounted to a brake housing of the vehicle by the bolts which normally mount the tire to the brake housing and a ski which is mounted at the bottom of the raise bracket such that the ski is rotatable relative to the raise bracket to vary the angle between them. The raise bracket is preferably pivotally linked to the vehicle to stabilize the bracket in the direction of movement of the vehicle. Pneumatic tires are also preferably positioned on the ski assembly to enable operation of the vehicle both in snow and on open road when the snow assembly is installed on the vehicle.
Abstract: Fully automatic brewing apparatus is disclosed for economically and efficiently brewing large quantities of beverage. Beverage concentrate is first brewed from a dry, beverage-making material, such as granulated tea leaves contained in a rotatable funnel which may be pivoted for emptying the concentrate into selected one of a pair of large reservoirs. The concentrate is then automatically diluted to an acceptable strength and temperature by the timed addition of water to the reservoir in a stream which provides complete mixing of the concentrate with the diluting water.
Abstract: Electrostatic recording material is made by coating a conducting paper support with a lacquer comprising at least one unsaturated organic compound and substantially no inert solvent and hardening the lacquer by exposure to radiation such as an electron beam or ultra-violet to form a dielectric layer. The dielectric layer retains charge well at high humidities.
Abstract: A latch mechanism mounted on the roof of a hopper car is arranged to hold a pivoted hatch cover in closed position over a trough in the roof of the car and has outer and inner spaced flanges upstanding with respect to the roof with a keeper therebetween having a laterally and downwardly extending configuration at the top for latching engagement with an element of the cover and mounted for translatory and pivotal movement under the control of a lever which is pivotally mounted between the outer flange and keeper and provided with a lock to hold the handle of the lever in its hatch cover closing position.