Abstract: Pinking scissors having replaceable cutting blades. The replaceable cutting blades have different edges to provide different types of pinking designs such as scallops, triangular sections, rectangular edges and the like. The replaceable blades are of rigid L-shaped construction one side serving as a base fitting against the supporting stem of the scissors and the other side having a cutting edge. Stop means are provided for registry on the supporting stems which are bifurcated and spaced apart to provide for easy reception of the replaceable blades. A special feature resides in the provision of a reversible cutting blade with both edges of the L-shaped sections having a pinking cutting edge. When not in use one section with the pinking edge serves as a base and when desired to provide a different design the blade may be removed and reversed with the unused portion serving as cutting edge and the section previously serving as a cutting edge used as a base fitting against the support stems.

Abstract: A multiple pulse laser from a single resonant cavity. An acousto-optic cell s used to modulate coherent light from a lasing element. Either multiple chirp signals or a masked mirror are used to provide distinct pulses of light. Through proper choice of materials for the acousto-optic cell and use of divergent optics, a higher power level is obtained. Use of a multi-tapped delay line permits a shorter period between pulses due to the linear superposition principle. When the mask embodiment is used, the acousto-optic cell focuses light which scans across the mask. Whenever the focused light passes through the mask, lasing occurs which generates an output pulse.

Abstract: A decomposition bomb in which intractable materials can be dissolved including a generally cylindrical hollow body, a liner of a chemically inert material within the body and extending over the upper edge thereof, a plug of chemically inert material which extends above the portion of the liner extending over the body and a closely fitting cap which is a hollow cylinder which can pass over the body, the liner and the plug to prevent movement of the liner and the plug. The invention also includes in association with the bomb a clamp within which the bomb can be located and which has a locking member having a pin bearing upon two ramps so that on partial rotation of the locking member pressure is applied to the cap of the bomb.

Abstract: A record side identification apparatus for a video disc player comprises a sensing member which is deflected to a first position and a second position in response to insertion of a video disc caddy into the player with a given side thereof respectively facing upward and downward. The deflected sensing member is depressed to illuminate the respective one of a pair of record side identification lights on the front instrument panel of the player during further insertion of the caddy into the player.

Abstract: The porosity of bulk alloys produced by deposition of the components of the alloy from the vapor phase can be reduced if the surface of the alloy is mechanically worked, preferably by a peening action, during the course of the deposition.Suitable apparatus for mechanically working the surface of the alloy are sets of hammers or flails driven by a suitable means that they strike the surface of the alloy with sufficient force to flatten asperities produced during the course of the deposition and preferably sufficient to remove porosity adjacent to the surface, yet do not at the same time grossly distort the surface of the alloy.

Abstract: In a continuous type ink jet printer having a conventional charging electrode for charging ink drops in accordance with a signal to be recorded on a record receiving media, a pair of deflection electrodes is mounted in a rocker which pivots on a holder mounted on the carrier. As the carrier is accelerated from the stop condition to print speed, the acceleration of the carrier effects rotation of the rocker about the pivot and thus automatic tilt of the deflection electrodes backward from the direction of carrier movement thereby tilting or inclining the electric field formed between the electrodes to compensate for carrier movement. In the preferred form, a simple magnetic type latch is applied to retain the rocker in one position for printing in a first direction, and to enable quick release and reversal, under inertial control, when the carrier moves in the opposite direction.

Abstract: An apparatus for ultra-sonically cleaning any information bearing material, web, sheet, fiche, film or similar strip material is operable in two modes. The first mode is directed to cleaning the film, and employs a pair of air nozzles for nonevaporatively stripping cleaning solvent from the surface of the film, after the film has been immersed in the solvent. The action of the air nozzles creates a mist of solvent about the nozzles, which is condensed by a plurality of cooling coils and collected, and circulates same through a purification system and returns the solvent to the cleaning tank for subsequent reuse in the film cleaning mode of operation. The air emerging from the nozzles is returned to the air compressor, thereby forming a closed loop compressor system which minimizes escape of solvent vapors into the atmosphere.

Abstract: One shot coating of powdered material with a metal film is achieved by allowing the material to fall through a vertical refractory cylinder, the inside of which is covered with the metal. The process takes place in a vacuum chamber and the cylinder is heated to evaporate the metal onto the falling material as it passes through the cylinder.

Abstract: The effect of earth gravity on the self assembly of tropocollagen molecules into collagen fibrils and on the aggregation of fibrils into collagen gels has been found to be surprisingly detrimental to the preparation of desirable biomaterials. Chemically and physically uniform biomaterials for use in repair or replacement of damaged or diseased human tissue and organs are prepared by otherwise conventional reconstitution of soluble tropocollagen carried out, however, under less than one gravity, preferably under zero gravity. Surprisingly better properties of the collagen aggregate suggest that improved biomaterials may be prepared from the uniform gels.

Abstract: Exceptional atomization of liquids is achieved by combining shock wave formation and vortex generation in a gas stream. In a vortex generating device, a flow passage is aligned with a flow axis connected between a fluid inlet and a fluid outlet, and a plurality of tornado-like gas vortices are generated in the flow passage. In one embodiment, a restriction is formed in the fluid inlet, and a source of gas under sufficient pressure to cause sonic velocity at the restriction is connected to the inlet. In another embodiment, a restriction is formed in a downstream portion of a flow passage, and a pair of auxiliary flow passages connect an upstream portion of the flow passage to the restriction. In an embodiment, a fluid outlet has a concave semispherical surface opening into an ambient region.

Abstract: A sheet metal vehicle chassis supporting a container of liquid to be sprayed is provided on at least one of its wheels with cam rollers fixed to the wheel for rotation. The roller cams compress a loop of pump hose at spaced locations to siphon liquid from the container by way of a suction hose and discharge liquid through a discharge hose connected to respective hose barbs projecting through a hose barb mounting plate overlying the roller cams and having opposite ends coupled to said loop. An orthogonally adjustable nozzle support tube, connected at one end to the discharge hose, insures a varying density and pattern spray of liquid on the underlying floor during movement of the vehicle in self-pumping operation over said floor.

Abstract: After exposure to radiation photoresist may be developed by a dry process using a gas plasma, preferably an oxygen plasma. The process can be used for chemical milling, photolithography, printed circuit board and photomask manufacture and it is particularly advantageous in the manufacture of semiconductors. The plasma development process can be followed by plasma etch and strip processes without requiring removal of the work piece from the plasma reactor.

Abstract: A vortex generating device has first and second adjacent bluff bodies downstream of a restriction. The bluff body closest the restriction has a flat surface facing upstream.

Abstract: A new peptide which has calcitonin-like biological activity which has a shorter amino acid chain and which is chemically more stable than natural calcitonins. Also resin peptides are disclosed which may be converted to peptides having biological activity and processes for producing said resin peptides and said peptides having biological activity.

Abstract: A material is separated from a fluid mixture by contacting the mixture containing the material with a first side of essentially solid, water-insoluble, hydrophilic, semi-permeable membrane in contact with an aqueous liquid barrier having ions which combine with the material to be separated to form a water-soluble complex. The partial pressure of the material on a second side of the semi-permeable membrane is sufficiently less than the partial pressure of the material in the mixture to provide separated material on the second side of the membrane. The separated material can be removed from the vicinity of the second side of the membrane by a gas stream. The second side of the membrane is contacted with an aqueous liquid medium to reduce the loss of the aqueous liquid barrier from the membrane which may otherwise decrease in separation efficiency during use due to water losses. The gas stream used to remove the separated material may be supersaturated with the aqueous medium, e.g.

Abstract: A thermostat monitoring and controlling the temperature of produce ripening within an enclosure and featuring a bridge circuit sensing errors between the actual and desired temperatures in which the desired temperature is selected directly in units of degrees. A bridge amplifier having feedback maintains the bridge in electrical balance to avoid errors due to changes in bridge component self heating. An error detection circuit having a single control simultaneously selects upper and lower error limits centered on the desired temperature, in units of degrees. The circuit indicates whenever the actual temperature goes outside these limits. An alarm circuit indicates a temperature error or a power failure in the thermostat at the thermostat and at a remote location. This circuit utilizes an alternating current source which activates current direction-dependent indicators operating on alternate half cycles.

Abstract: A fiber-optic face plate is mounted across the light emitting surface of an electroluminescent semiconductor element so that the light emitted from the semiconductor element passes through the face plate. The electroluminescent semiconductor element may be enclosed in a housing with the face plate extending across and being hermetically sealed to an end of the housing.

Abstract: A toolholder adapter has a cylindrical body, a cylindrical shank extending axially from one end of the body, a cylindrical flange extending radially from the body, a tapered socket within the body for receiving a tapered shank toolholder, and a clamping nut on the body which has inwardly projecting tabs that are positioned to bear against the flange of the tapered shank toolholder to clamp it in the socket. The toolholder adapter is dimensioned to fit in the tool storage magazine of a machine tool and to be handled by the automatic tool changer thereof.

Abstract: Method for the manufacture of membrane separation units suitable for the separation of components from mixtures containing them. These separation units can be made from elongated anisotropic hollow fiber membranes and can be used for the separation of olefinic compounds from saturated materials.

Abstract: An emulsion of a disperse phase liquid in a continuous phase liquid is produced by atomizing the disperse phase liquid electrostatically and entraining the atomized droplets in a moving layer of continuous phase liquid. To produce a spray with atomized droplets of small and uniform size a disperse phase liquid, such as wax in a solvent, is directed to flow over the sharp edge of a blade maintained at a high voltage with respect to the conductive surface of the drum. The drum is rotated so that the surface is wetted by a reservoir of continuous phase liquid and so that the surface layer of liquid intercepts the spray of droplets at a uniform rate to produce an emulsion of consistent concentration. The concentration is controlled by setting the rates of flow and the number of cycles of interception.