Abstract: A razor knife has an elongated housing formed of a front housing part and a rear housing part and having a longitudinally extending guide. The rear housing part is backwardly separable from the front housing part and carries a blade holder which has a seat for a razor blade and an actuator button exposed at a slot formed in the front housing part. This holder is displaceable by sliding of the actuator button from a back position with the blade wholly enclosed by the housing into a front position with a portion of the blade projecting forwardly from the housing. A tension spring inside the insert or back housing part continuously urges the holder into the back position. Interengaging formations on the operating button and the housing, however, allow the blade to be held in the outer position so long as a slight inward force is exerted on the slidable actuator button.

Abstract: Process for modifying a tacky surface of a multilayer negative-working surprint proof having a photosensitive tacky layer as the outer layer which comprises exposing the tacky layer through a screen tint, e.g., having a tint value of 25 to 75 percent, and applying an admixture of particulate material and carrier particles and removing excess particulate material and the carrier particles from the tacky surface. The ratio of average particle diameter of the carrier particles to average particle diameter of the particulate material is greater than 2 and the weight ratio of particulate material to carrier particles is less than 1. A durable matte finish is obtained that is nonblocking, is capable of being written on, and is noncracking over extended storage periods.

Abstract: Fluorinated phenolic polymer, process for its preparation, and use thereof, particularly in the form of a film as a membrane in an electrolytic cell, said polymer consisting essentially of recurring units of(1) --CF.sub.2 CFX--wherein X in each of the recurring units is independently selected from F, Cl, R and OR wherein R is perfluoroalkyl of 1 to 4 carbon atoms and ##STR1## wherein Y is Cl, R or OR wherein R is perfluoroalkyl of 1 to 4 carbon atoms; M is H, alkali metal or NR'.sub.4 wherein R' in each of the recurring units is independently selected from H and alkyl of 1 to 6 carbon atoms; x is an average value within the range about 0.2 to about 1.0; n is 1, 2 or 3; and p is 0 or 1,said polymer having 0 to about 21 units of (1) per unit of (2).

Abstract: A compound of the formula ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, phenyl lower alkyl or halo substituted lower alkyl;R.sub.2 is hydrogen, lower alkyl, phenyl lower alkyl or halo substituted lower alkyl;n is 0, 1 or 2;X is --(CH.sub.2).sub.m Z--;Z is oxygen, sulfur or imino;m is 0 or 1;Y is S--R or ##STR2## R is hydrogen, lower alkyl, ##STR3## R.sub.3 is lower alkyl, phenyl or phenyl lower alkyl; and R.sub.4 is hydroxy, amino, hydroxyamino or lower alkoxy. These compounds are useful as hypotensive agents.

Abstract: The invention relates to chroman derivatives of the general formula ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, substituted phenyl, phenyl, phenyl-lower alkyl, substituted phenyl-lower alkyl or lower alkyl-amino-lower alkyl;R.sub.2 is ##STR2## R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each is independently selected from hydrogen, hydroxy, amino, -o-acyl, -o-lower alkyl; ##STR3## halogen, lower alkyl, or halo substituted lower alkyl; and salts and hydrates thereof.These compounds are useful as anti-inflammatory agents; for inhibition of blood platelet aggregation, as antiallergy and as antihypertensive agents.

Abstract: A water based coating composition that can be dried at ambient temperatures and is useful for coating metal or plastic substrates and in particular for finishing or repairing automobiles and trucks; the coating composition contains watersoluble organic solvent, binder and pigments; the binder is of(1) an alkyd of an esterification product of drying oil fatty acids, aromatic polycarboxylic acids and a polyhydric alcohol;(2) an alkylated melamine formaldehyde resin,(3) an acrylic dispersing resin and(4) an organo metallic drier;the improvement that is used with this composition is (1) a polyisocyanate such as the biuret of hexamethylene diisocyanate or isophorone diisocyanate and (2) an aqueous ammonia solution.

Abstract: In the solution mining of uranium ores using an aqueous ammonium carbonate leaching solution containing hydrogen peroxide and/or molecular oxygen as oxidant, permeability of the ore formation during the leaching operation is maintained or improved by including a small amount of alkali metal silicate dissolved in the leaching solution. The silicate also improves the stability of the oxidant in many instances.

Abstract: Ionic hydrocarbon polymers having improved adhesion to nylon are provided comprising copolymers of .alpha.-olefins and alpha,beta-ethylenically unsaturated monocarboxylic acids and optionally other monoethylenically unsaturated monomers wherein from about 10 to 90 percent of the carboxylic acid groups are ionized by neutralization with zinc ions uniformly distributed throughout the copolymer such that the resultant ionic copolymer has a zinc salt content of from about 0.0115 to about 0.0229 mols per 100 grams of ionic copolymer. Such ionic copolymers are particularly suitable to be coextruded with nylon as a result of their improved adhesion thereto.

Abstract: A detector for luminous radiation transmitted by an optical fiber comprises an avalanche photodiode whose light-receiving surface, separated by a high-resistivity portion of a semiconductor body from a reverse-biased p/n junction, is serrated with major sawtooth flanks substantially parallel and minor sawtooth flanks substantially perpendicular to the direction of incident radiation. The optical fiber emitting that radiation is laterally offset from the semiconductor body and has an axis including a small angle with the plane of the p/n junction.

Abstract: A node in a packet-switching data-transmission network has a processor distributing incoming messages or packets from a receiving buffer to transmitting buffers selected according to routing data established by an updating circuit which algebraically combines incremental delays with respective path delays to obtain total delays assigned to message transmission from the processor over respective transmitting buffers and associated outgoing transmission paths. The increment delays assigned to the respective buffers are calculated by a delay estimator utilizing data from the processor including packet-service times and arrival and departure times of the packets in the various buffers, the path delays assigned to routes extending from the respective transmitting buffers to a terminal node being communicated to the updating circuit via the processor from nodes connected downstream of the transmitting buffers.

Abstract: Biologically active 8-aza-16,16-difluoroprostanoids having the formula: ##STR1## wherein A is CH.dbd.CH (cis or trans), C.tbd.C, or CH.sub.2 CH.sub.2 ;R is H, C.sub.1 -C.sub.12 n-alkyl, branched chain alkyl, or cycloalkyl, or a physiologically acceptable metal or amine salt cation;R.sup.1 is H, CH.sub.3, or C.sub.2 H.sub.5 ;R.sup.2 is CH.sub.3, CF.sub.3, phenyl, or mono- or disubstituted phenyl, the phenyl substituents being selected from the group F, Cl, CH.sub.3, OCH.sub.3, NO.sub.2, and CF.sub.3 ;n is an integer from 3 to 8 when R.sup.2 is CH.sub.3 or CF.sub.3, or from 0 to 2 when R.sup.2 is phenyl or substituted phenyl;as racemic stereo isomer mixtures, or single or mixed optically-active stereo isomers.

Abstract: Fluorinated allylisocyanurates are extremely efficient gelling agents for fluoroelastomers. Blends of fluorinated allylisocyanurate gelled fluoroelastomers with non-gelled fluoroelastomers have improved processability as compared with non-gelled fluoroelastomers and blends of other gelled fluoroelastomers with non-gelled fluoroelastomers.

Abstract: A process for making yarns bulked in a hot fluid jet more uniform in bulk comprises cooling the hot and bulked yarn on a moving screen with a water mist followed by passing the wet yarn under a tension of 0.01-0.05 gpd through a turbulent forwarding jet of steam and then through a cooling stream of air which impinges perpendicularly on the yarn while the yarn is moving under slightly greater tension of about 0.02-0.15 gpd and then wound up under normal packaging tension.

Abstract: A doll play set including a doll figure and a doll house. The doll house is open access, having a circular floor and three radially-extending upright walls defining three areas for play within a generally hemispherical outline or outer shape. The doll house is rotatably mounted on a base to afford ready access to all the areas. A receptacle for the doll figure is provided at the upper center of the doll house. There is a playhouse cover of flexible material, conforming to the hemispherical shape of the doll house, and being supported solely by the walls. The cover has a central opening to afford access to the receptacle. The components are proportioned to permit both (1) the doll to be placed in the receptacle up to its waist, with the cover over the doll house giving the appearance of an oversized skirt, and (2) the doll to be placed and played with in the play areas, the doll being shorter than the walls.

Abstract: A bulky continuous filament yarn, in which continuous filament core yarns of polymeric material are substantially straight and free from loops and comprise from about 65 to about 93 percent of the total filaments by weight while the remainder of the total filaments are continuous filament effect yarns having a denier per filament of up to 5.0 that are inserted between the filaments of the core yarn and protrude from the surface of the core yarn in a mixture of crunodal and arch-like loops, is made by feeding a larger denier yarn at low overfeed and a much smaller denier yarn at low to moderate overfeed through a jet supplied with ambient air.

Abstract: A security seal formed of a single piece of molded plastic in which a socket member and a stud member intended for locking engagement are disposed on the ends of legs so mounted on a base that the seal may be closed by squeezing the legs together with the fingers of one hand so that the socket and stud lock together.An additional bowed member extends between the legs, which flexes when the legs are squeezed together, providing additional spring back force to cause the stud and socket to separate if not completely locked together. The additional bowed member also provides additional aligning force to insure that the stud and socket are properly aligned for engagement when squeezed together.

Abstract: An improved method of forming a pigmented powder coating composition of the kind wherein the constituents are melt-extruded and the solidified extrudate then ground into a powder is provided. In the improved method, the non-pigment constituents are introduced into a melt-extruder and a pigment dispersion is simultaneously introduced into the extruder at a point downstream of the introduction of the non-pigment constituents. Powder coatings produced by this improved method display enhanced appearance and gloss.

Abstract: The seat and back of a seating unit are each formed of a plurality of cushioned upholstered elements which extend between a pair of L-shaped support members to provide continuous back and seat surfaces. The L-shaped members have an elliptical cross section which includes two hollow semielliptical portions, a central wall connecting these portions, and two longitudinal channels on opposite sides of the central wall. The upholstered elements are attached to the L-shaped members by plastic guiding strips which ride in the channels.

Abstract: A string-supported device capable of simultaneous rotation about its own axis, translational motion and orbital motion. An axle consisting of two segments, both axle-segments connected together, either directly or indirectly, and each axle-segment capable of rotating independently of the other axle-segment. Two discs are connected through their centers to each of the two axle-segments. Opposite ends of a single string are connected to each axle-segment, and the string is looped over a support member upon which it can readily slide. The support member is connected to a swivel system which is in turn connected to a ring. In order to operate the device the string is first wrapped in opposite directions around each axle-segment, and the body of the yo-yo is allowed to fall while the operator is holding the ring. An up-and-down motion of the yo-yo device is thus initiated.

Abstract: A utility support device for use in conjunction with hollow-rung ladders is provided which derives support from studs inserted into the hollow rungs of the ladder. The device is easily mounted to either side of the ladder for ease of access and convenience of the user. The device is suitable for supporting tools, materials and the like and may be easily relocated from one position on the ladder to another. The device is adjustable to accommodate different rung spacings, as well as to allow maintenance of substantially horizontal support through varying angles of inclination of the ladder.