Abstract: A grid-frame stabilizer and method of operation for an electrostatic precipitator includes a rigid stand-off member that prevents oscillation of a grid frame used to keep discharge electrodes of the precipitator separated from one another. One end of the stand-off member is rigidly connected to the grid frame and the other end is rigidly connected to a fixed housing component through at least one electrical isolator. The fixed housing component is firmly affixed to an interior region of the precipitator. The stand-off member passes into the housing component through a housing opening which is preferably sealed by a membrane designed to prevent particle contamination of the surfaces of the electrical isolators.

Abstract: A high voltage electrode for supplying high potential electrical energy to dispersed electrically conductive matter suspended in a relatively non conductive continuous phase atmosphere within a sealed chamber of a vessel. The electrode receives power from a source which is external to the vessel and the electrode passes through an insulated cover secured to an opening in the vessel. The insulated cover may include further openings for receiving a fluid sensor and/or a vapor vent.

Abstract: A high voltage electrostatic filter has alternating oppositely charged plates with an ionizing wire affixed directly to alternate plates so as to be included in a removable charged assembly unit which may also include the high voltage source and deflection of the direction of air flow by the charged plates brings airborne particulate into contact with the plates.

Abstract: A device for use in an electrostatic precipitator including an electrically insulating disk having a hole, which may be a venturi-shaped passage, for receiving a tie rod and an arrangement for supporting the tie rod in the hole so as to allow a fluid to flow through the hole between an inside surface of the hole and the tie rod. An air stream deflector may be mounted on the tie rod to provide further protection and help direct air flow. A recirculating flow system may also be provided to direct clean air through the venturi-shaped passage.

Abstract: An on board electrostatic filter for a vacuum cleaner is disclosed. The filter includes a pair of conductive filaments insulated from one another and disposed close together in a substantially parallel, side-by-side relationship. Circuitry is provided for applying an electrical potential difference between the two conductors. This dual filament conductor is preferably packed into a relatively small volume in a tortuous configuration, to form a random mesh, or can be oriented in a more regular serpentine configuration. Other embodiments describe the mesh electrostatic filter to purify air in an HVAC system.

Abstract: An on board electrostatic filter for a vacuum cleaner is disclosed. The filter includes a pair of conductive filaments insulated from one another and located close together in a substantially parallel, side-by-side relationship. Circuitry is provided for applying an electrical potential difference between the two conductors. This dual filament conductor is preferably packed into a relatively small volume in a tortuous configuration, to form a random mesh, or can be oriented in a more regular serpentine configuration. Other embodiments describe the mesh electrostatic filter to purify air in an HVAC system.

Abstract: An air purifier is provided having a purifier housing and an air way housing mounted therein. A fan having a cylindrical whirlpool leaf construction is mounted within the air way housing and air is directed in a predetermined direction through an air exit opening formed in a wall of the purifier housing. An extended and tapered discharging copper needle is electrically coupled to a high voltage generator contained within the purifier housing and produces negative ions. The discharging needle is pointed in contour and has an apex end located adjacent the air exit opening. The discharging needle extends in the direction of the passage of high pressure air from the purifier housing which allows the discharging needle to vibrate responsive to the high pressure air flow and increases the amount of negative ions mixed with the air passing from the purifier housing.

Abstract: It is disclosed to inhibit homopolymerization of a bis(vinylsulfonyl)alkane hardener for a hydrophilic colloid useful in forming a layer of a photographic element by associating with the hardener a nitro-substituted aromatic compound.

Abstract: An imaging combination comprising (i) a tellurium (II) or (IV) compound as an oxidizing agent and (ii) a reducing agent provides an improved amplified image. This imaging combination is useful in heat-developable materials containing sources of physically developable nuclei. A developed image can be provided in the material containing the developable nuclei and can be provided by heating the element to moderately elevated temperatures.

Abstract: A thermally developable light-sensitive material with improved storage stability and a minimized thermal fog without an increase in both light discoloration and dark discoloration which comprises a support and having therein or in at least one layer thereon at least (a) an organic carboxylic acid silver salt comprising about 50 mol% or more of silver behenate, (b) a photocatalyst and (c) a reducing agent, and with the material containing (d) at least one compound (1) represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom or a substituent selected from the group consisting of a nitro group, a cyano group and a halogen atom, with the proviso that R.sub.1, R.sub.2 and R.sub.3 are not all simultaneously a hydrogen atom, and (2) having a half-neutralization point of from about 40 mV to about 140 mV above the half-neutralization point of benzoic acid in isopropanol.

Abstract: A copolymer containing 0.1 to 20 mol-% of recurring structural units of the formula ##STR1## is a valuable peptising agent for the precipitation of silver halide. Sensitivity, onset of development and silver coating power are advantageously influenced.

Abstract: A micro-capsular material for use as a photographic reproducing medium includes a plurality of micro-capsules distributed over a given surface. Each of the capsules is formed with a mantle of light transmissive material. The mantles may be clear or colored and are advantageously transparent. The contents of each of the capsules includes a photoconductive material as well as a color progenitor or precursor material. Simultaneous exposure of the capsular material to light and high frequency electrical energy causes rupture of the capsule mantles and release of the capsular contents. When an image is focused by a lens onto the surface, selected ones of said capsules are ruptured to thereby result in a reproduction of the image. Dispersing micro-capsules having different color progenitor materials makes possible color photography when means are provided for selectively directing only those component of colored light onto the micro-capsules having corresponding color progenitor materials.

Abstract: A photosensitive recording material containing in admixture in a binder medium:(1) an imaging substance which is a tellurium tetrahalide or an organo-tellurium compound having a halogen atom directly linked to a tellurium atom and at least one organic substituent comprising a carbonyl group,(2) a photo-oxidizing agent which is a photosensitive 4-(2'-nitrophenyl)-1,4-dihydropyridine, and(3) a heat-activatable organic reducing agent or reducing agent precursor adapted to reduce the tellurium compound upon heating but leaving that compound substantially unaffected at and below 60.degree. C.

Abstract: A heat developable, photographic material comprising (a) a photographic metal compound with (b) an oxidation-reduction image-forming combination comprising (i) a tellurium (II) or (IV) compound as an oxidizing agent and (ii) a reducing agent provides an improved amplified image. The photographic metal compound can be, for example, photograhic silver halide. A developed image can be provided in the material after imagewise exposure by heating the element to moderately elevated temperatures.

Abstract: A method of spectrally sensitizing a photographic light-sensitive emulsion where a water-soluble solution, prepared by dissolving a methine dye having at least one water-soluble group in water in the presence of a "Red Shift Compound", as hereinafter defined, is added to a photographic light-sensitive emulsion to provide a photographic light-sensitive emulsion spectrally sensitized with increased sensitizing efficiency and with reduced fog. The disadvantages caused by the use of high organic solvent contents are avoided and photographic light-sensitive emulsions suitable for high-speed coating are obtained.

Abstract: A photo-induced thermally degradable imaging system comprising a continuous, water-insoluble film of a peroxide copolymer of oxygen and a vinyl aromatic monomer having the structural formula: ##STR1## WHEREIN R.sub.1 can be hydrogen or an alkyl group containing from 1 to 4 carbon atoms, R.sub.2 is hydrogen, an alkyl group containing from 1 to 4 carbon atoms, an aryl group containing from 6 to 12 carbon atoms or a halogen atom and b is an integer from 1 to 2, on a substrate.

Abstract: A photographic vesicular imaging composition, element and process are provided using a binder having a suitable gas impermeability, a cyclopropenone vesiculating agent, and optionally a spectral sensitizing compound.

Abstract: A pattern-forming material comprises a substrate and a radiation sensitive chalcogenide layer disposed thereon. The radiation sensitive chalcogenide layer consists of an amorphous layer having a chemical composition of 75 to 95 mol% of selenium and 5 to 25 mol% of germanium and a silver layer superimposed thereon. The pattern-forming materials having the radiation sensitive chalcogenide layer of the invention are particularly useful in lithographic applications.

Abstract: A radiation sensitive composition comprises a quaternary ammonium salt and a chemical sensitiser of the formula ##STR1## wherein R.sup.21 is aryl, arylakenyl or arylalkyl, R.sup.22 is aryl, alkyl, arylalkenyl, arylalkyl, carboxylic acid or salt, or hydrogen and X is carboxylic acid or salt. The quaternary ammonium salt is of the type which will accept at least one electron on exposure to radiation to form a substance capable of causing metal to be deposited onto said substance from an electroless plating solution in contact with said substance and comprising a salt of said metal and a reducing agent. A radiation sensitive plate comprises a metallic substrate coated with a radiation sensitive layer comprising a quaternary ammonium salt. The layer may be formed of the above composition.

Abstract: An imaging system is provided wherein a blocked dye precursor is activated by an amine to an unblocked form which, in the presence of an inert cobalt (III) complex containing amine releasing ligands, undergoes a redox reaction to form a dye. The amine generated during the redox reaction causes further dye formation, giving increased speed.

Abstract: A photographic material comprising a support having thereon a light-sensitive layer containing powdered titanium dioxide, a soluble silver salt, a soluble copper (II) salt and a hydrophilic binder and a method of forming a black copper image comprising dipping the imagewise exposed photographic material into an aqueous solution containing a reducing agent.

Abstract: Method of recording visible data wherein a polymeric layer containing acetyl acetonate is disposed through an image pattern to a laser beam.

Abstract: A photosensitive material is provided in which at least one surface portion of a substrate contains di-iodopropyl cellulose uniformly distributed therethrough. A photosensitive sheet material can be formed totally of di-iodopropyl cellulose or in part by di-iodopropyl cellulose, provided that the surface thereof contains di-iodopropyl cellulose. Upon exposure to electromagnetic radiation, including wave lengths not greater than 0.315 microns, radical iodine is liberated which forms molecular iodine spots to form an image corresponding to the intensity of the irradiation with the electromagnetic radiation. A provision is further made for bringing the surface of the material into contact with a substance which forms a colored compound upon reaction with the iodine.

Abstract: An electrostatic printing plate is obtained by forming a permanent electroconductive pattern on its exposed portion, which is effected by irradiation of light to expose a light image on a photosensitive material comprising a photosensitive composition containing an aliphatic nitrogen compound and an organic halogen compound capable of generating a free radical upon irradiation by light.

Abstract: A photosensitive material is provided in which at least one surface portion of a substrate contains 2,3-di-(2,3-diiodopropoxy)-propyl cellulose uniformly distributed therethrough. A photosensitive sheet material can be formed totally of 2,3-di-(2,3-diiodopropoxy)-propyl cellulose or in part thereof, provided that the surface thereof contains 2,3-di-(2,3-diiodopropoxy)-propyl cellulose. Upon exposure to an activating electromagnetic radiation in which the intensity is modulated according to the configuration of an image, a visible image is formed on the surface of the material. Provision is further made for bringing the surface of the material into contact with the substance which forms a colored compound upon reaction with iodine liberated upon subjecting the surface to activating electromagnetic radiation.

Abstract: Disclosed is a novel microimaging method suitable for photo-composition. The method involves:(a) providing a film comprising an organic polymer as matrix material having uniformly dispersed therein:I. a photochemically reactive organo diselenide characterized by the formula:R.sub.1 --Se--Se--R.sub.2wherein R.sub.1 and R.sub.2 are aralkyl or alkyl hydrocarbon moieties;Ii. a tertiary phosphine or phosphite characterized by the formula: ##STR1## wherein each n is 0 in the case of a phosphine and 1 in the case of a phosphite and R.sub.3, R.sub.4 and R.sub.5 are, independently, substituted or unsubstituted aryl hydrocarbon moieties, andIii. an azo organic peroxide characterized by the formula:R.sub.6 -- N .dbd. N -- R.sub.7wherein R.sub.7 is a peroxycarboxylic acid ester moiety and R.sub.6 is either a straight or branched chain alkyl group containing from 4 to 10 carbon atoms or the same as R.sub.

Abstract: A light-sensitive vesicular imaging composition is disclosed comprising a vesiculating agent which liberates gas upon exposure to activating radiation, a binder and a diol speed-increasing agent. The composition is coated as a thin film. Imagewise irradiation of the element causes gas to be released in the exposed areas. The composition, comprising gas entrapped in a thermoplastic matrix, can be heated to produce a visible record.

Abstract: Selected areas of a layer comprising an imaging material in the form of a tellurium tetrahalide adduct of an aromatic amine, exemplified by a tellurium tetrachloride adduct of dimethyl aniline, which adduct is free from any diazo groups, in the presence of a spectral photosensitizer, are subjected to the imaging effect of imaging energy, and of development, advantageously of developing energy, causing a change in the tellurium-organic imaging material in the imaged areas accompanied by a change in the detectable characteristic of the imaging material in the imaged areas. The aforesaid imaging material is especially advantageously extended in a matrix of a polymeric or resinous film-forming material. The invention in its generally most advantageous form involves an imaging step employing imaging energy and producing a latent image, followed by a heat development step to produce the detectable recorded information or image.

Abstract: A thermally developable light-sensitive material comprising a support having thereon or therein at least one layer containing at least (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide, and (c) a reducing agent, which contains (d) a palladium-containing compound in at least one layer provided on or in the support.

Abstract: This invention relates to a radiation-sensitive copying composition comprising a compound (1) which splits-off an acid upon irradiation and a compound (2) having at least one group selected from the group consisting of a carboxylic ortho acid ester group and a carboxylic acid amide acetal group, which composition, upon irradiation, forms an exposure product having a higher solubility in a liquid developer than the non-irradiated composition.

Abstract: A heat developable, photographic material comprising, in reactive association, (a) a photosensitive, transition metal carbonyl compound, (b) an oxidation-reduction image-forming combination comprising (i) a tellurium (II) or (IV) compound as an oxidizing agent, with (ii) a reducing agent, and (c) a binder can provide an improved non-silver image. After imagewise exposure of the heat developable material, an image can be developed by merely heating the material.

Abstract: A photographic material comprises certain dyes that, on exposure, release a species which catalyzes the reduction of silver salt oxidizing agents in the presence of organic reducing agents. The photographic material, after imagewise exposure, is heated or processed in a physical developer to develop the image.

Abstract: A novel non-silver salt type photosensitive composition which comprises (A) N,N'-diphenyl-p-phenylenediamine as a color developing agent and tetramethylthiuram disulfide which unexpectedly functions rather as another color developing agent than as a storage stabilizer, (B) an organic halide compound as a photoactivator, (C) a salicylic acid derivative as a storage stabilizer for an unexposed photosensitive material, (D) thiourea which functions rather as an agent capable of functioning as both an anti-foggant at and after image formation and a contrasting agent than as a storage stabilizer, and (E) at least one member selected from the group consisting of (i) 2-methylindole, (ii) 2-mercaptothiazoline and (iii) p-diethylaminobenzaldehyde as a color tone adjusting agent.

Abstract: .alpha.-(9-Anthryl)-.beta.-(3-carbazolyl)ethylene derivatives, process for preparing same and electrophotographic light-sensitive materials containing .alpha.-(9-anthryl)-.beta.-(3-carbazolyl)ethylene derivative.

Abstract: Disclosed is an imaging method based upon the selective exposure of a select pair of photoactive materials to actinic radiation. According to this method, charge exchange between materials of a photosensitive mixture results in the selective decomposition of one of the components of said mixture. In the event that the above materials are dispersed within a polymeric film, the selective decomposition of one of these dispersed components will be manifest by changes induced in the polymeric film. Such changes in the characteristic properties of the film will, of course, vary depending upon the content of the dispersed photosensitive components in the film and the extent of decomposition of one of said materials.

Abstract: Organic holographic recording media comprise organic photosensitive compounds such as .alpha.-diketones, quinones and nitro compounds in sucrose benzoate as host.

Abstract: A photographic element comprises a support having thereon a binder containing numerous vesicles, each vesicle comprising a matrix of lipid membranes containing rhodopsin and one of(a) metal cations or(b) materials selected from the group consisting of chelatometric materials, colorimetric reagents for said metal cations, materials which are caused to react by the presence of said metal cations to form a gas or a visible reaction product, and materials which form elemental metal through redox reactions with said metal cationsInside the vesicles and the other (a) or (b) outside the vesicles. On imagewise exposure to light, the metal cations flow through the vesicles and react with the above material in the exposed areas only.

Abstract: A composition in the form of a dispersion in a hydrophilic continuous phase of a combination of N-vinylcarbazole, a halogenated hydrocarbon, 4-(p-dimethylaminostyryl)-quinoline as a sensitizer and a phenol derivative, as a shelf life extending additive, having the formula ##STR1## where R.sub.1 and R.sub.2 are individually C.sub.1 to C.sub.4 alkyl, and R.sub.3 is hydrogen, hydroxyl groups, C.sub.1 to C.sub.4 alkyl or C.sub.1 to C.sub.4 alkoxyl. The amount of the additive is in the range from 0.001 to 0.1 Wt% of N-vinylcarbazole.

Abstract: A light-sensitive material comprising a layer containing:(a) at least one organic compound containing tellurium and/or selenium; and(b) at least one sensitizing compound selected from the oxides, basic halides, halides, sulfates, nitrates, perchlorates, or organic acid salts of In (III), Sb (III), Ti (IV), Zn (II), Bi (III), Ge (IV), and Sn (IV).

Abstract: An image-forming element is disclosed comprised of a support and a coating thereon containing a cobalt(III)complex and a compound containing a conjugated .pi. bonding system capable of forming at least a bidentate chelate with cobalt(III). The coating is predominantly free of anions which will form conjugate acids by deprotonation of a cobalt(II)complex containing the chelating compound. In one preferred form the image-forming element is radiation-sensitive. In this form the image-forming element can contain a photoactivator capable of initiating reduction of the cobalt(III)complex. An imaging process is disclosed in which the coating is exposed to actinic radiation to produce an image. Images can be recorded directly within the image-forming coating or in a separate image-recording element or layer by use of the residual cobalt(III)complex or by use of one or more of the reaction products produced by exposure.

Abstract: A method is disclosed for making patterned gold films in the manufacture of integrated circuit devices. The method calls for the deposition of a film of a gold compound whose heat of formation is in the range of from -20 to +10 Kcal/mole, selectively reducing the gold compound to elemental gold by irradiation, and chemically removing the unreduced portions of the gold compound.

Abstract: Aromatic sulfonium compounds are sensitized to longer wavelengths of light by means of aromatic tertiary amines, aromatic tertiary diamines and certain aromatic polycyclic compounds.

Abstract: Selected areas of a layer comprising a tellurium tetrahalide imaging material, exemplified by tellurium tetrachloride, are subjected to the imaging effect of imaging energy, and of developing energy causing a chemical change in the tellurium tetrahalide imaging material in the imaged areas accompanied by a change in the detectable characteristic of the imaged areas. The aforesaid imaging material is extended in a matrix of a film-forming material together with a sensitizer. The application of the energy is advantageously effected in two steps, an imaging step employing imaging energy and producing a latent image, followed by a development step employing developing energy and producing the detectable recorded information or image.

Abstract: Amine salts of polyacetylenic compounds containing a carboxylate moiety, preferably in conjunction with a group capable of hydrogen bonding, have unusually high radiation sensitivity, and are useful radiation-sensitive components in imaging systems.

Abstract: A method of recording and reproducing information using a photographic recording material which comprises a support bearing at least one photosensitive layer containing photoactive protochlorophyll(ide)-apoprotein complex. The layer is exposed to light of the wavelength region absorbed by the complex in a pattern representing information to be recorded and forms a corresponding pattern of differentiations in light-absorption and fluorescence-emission characteristics. The latter can be scanned to reproduce the information.

Abstract: An organo-tellurium light-sensitive material is described which comprises a support having coated thereon at least one layer comprising an organo-tellurium compound, a sensitizer, a binder, and colloidal particles of an element selected from the group consisting of gold, tellurium, germanium, palladium and platinum. The light-sensitive material has improved sensitivity as compared with one not containing the above colloidal particles.

Abstract: An imaging system and process wherein an element comprising a cobalt complex-developer redox system is catalyzed by cobalt sulfide. The cobalt sulfide can be imagewise produced by exposing a photoreducible cobalt complex in the presence of a thioamide, or it can be uniformly distributed and either masked in an imagewise fashion, or reacted with imagewise distributed color developing agent.

Abstract: Disclosed is a microimaging composition which comprises a film of an organic polymer as a matrix material having uniformly dispersed therein:I. a photochemically reactive organo diselenide characterized by the formula:R.sub.1 --Se--Se--R.sub.2wherein R.sub.1 and R.sub.2 are aralkyl or alkyl hydrocarbon moieties;Ii. a tertiary phosphine or phosphite characterized by the formula: ##STR1## wherein each n is 0 in the case of a phosphine and 1 in the case of a phosphite and R.sub.3, R.sub.4 and R.sub.5 are independently substituted or unsubstituted aryl hydrocarbon moieties; andIii. an organic peroxide characterized by the formula: ##STR2## wherein R.sub.6 and R.sub.7 are aryl or substituted aryl.

Abstract: Photosensitive compositions containing nitrate ester chain polymers, such as nitrocellulose, molecularly intimately admixed with at least one compound having a free basic amine group, preferably a primary amine group, directly attached to an aromatic ring carbon and also containing an organic acid. On suitable exposure to ultraviolet light, such compositions will print out a useful image directly, or, should a much lesser light exposure be preferred, they can be developed and fixed to an image intensified to useful strength by either heat alone, for amines that are sufficiently volatile at ingredient reaction temperatures, or by solvent selective removal of ingredients from unexposed areas, and subsequently intensified either by heat or overall ultraviolet exposure. Exposed areas of such compositions are more resistant both to volatilization of the amines and to solvent removal than the non-exposed areas. High optical density is attainable using very thin coatings, permitting high resolution grainless images.

Abstract: Process for preparation of transparencies from a solid phase dispersion of photoconductive particles in an insulating binder matrix. In this process, a dispersion is initially formed from an insulating polymer resin and an organoselenium compound capable of undergoing selective decomposition in response to an appropriate stimulus, whereby elemental selenium is extruded from said organoselenium compound and deposited within the polymeric resin. As a result of this deposition of elemental selenium within the insulating layer, the layer is rendered photoresponsive and can be used in conventional electrophotographic processes. Subsequent to the development and fusion of a developer image on this imaging member, the extrusion/deposition reaction can be reversed and the selenium deposit erased thus leaving a toner image fused to a substantially transparent polymeric film.