Abstract: The invention relates to bypass valves for use in wellbores, particularly but not exclusively to bypass valves used during the setting of hydraulic anchor packers. The invention provides a bypass valve for selectively isolating the interior of a down-hole assembly from the exterior thereof, the bypass valve comprising guide pin in received slot being adapted to permit movement of a piston (30) from a first position to a second position in response to a predetermined pressure differential between a bore (58) of the piston (30) and the exterior of a body (4) but normally preventing movement of the piston (30) to a third position in which the bore (58) of the piston (30) is substantially isolated from the exterior of the body (4), and an extension of the guide slot for overriding the guide pins in the slot, so as to permit movement of the piston (30) to the third position.

Abstract: A device (100) and method (200, 300) authenticate and secure control event data for a vehicle, wherein the device includes: A) a microcontroller (104), coupled to receive control event information, for attaching a first time stamp and vehicle identification number VIN to the control event information to provide first information and sending the first information to memory (106) in time overlap fashion; B) the memory (106), coupled to the microcontroller (104) and a microprocessor (108), for storing first information and second information in time overlap fashion; and C) the microprocessor (108), coupled to the memory (106) and a plurality of transducers (110), for determining whether received impact data varies from previous impact data, and where received impact data varies, adding a second time stamp and VIN to the received impact data to form second information.

Abstract: An alkaline aqueous developing solution for developing photoresists or the like contains, as an anti-scum agent, an ethoxylated surfactant having the general formula:R--[O--(CH.sub.2 --Ch.sub.2 --O).sub.n ].sub.m --X (I)where R is a hydrophobic group, X is H or an anionic group, m is from 1 to 3, and n is at least about 15, preferably at least about 20, more preferably at least about 30.

Abstract: A negative acting photoimageable composition comprisesA) between about 30 and about 70 wt %, based on total weight of A) plus B), of a organic binder polymers having sufficient acid functionality to render said photoimageable composition developable in alkaline aqueous solution,A) comprising between about 3 and about 65 wt % relative to total of A) plus B) a binder polymer A') having a weight average molecular weight between about 5000 and about 40,000 and a T.sub.g of between about 40 and about 100, and 5 to 67 wt % relative to total of A) plus B) a binder polymer A") having a weight average molecular weight between about 41,000 and about 200,000 and a T.sub.g of between about 40 and about 100,B) between about 30 and about 60 wt %, based on total weight of A) plus B), of .alpha.,.beta.-ethylenically unsaturated compounds, said component B) comprisingB') an isocyanate trimer having tri-.alpha.,.beta.

Abstract: A mixer for plasticable resins has a fixedly positioned heated barrel with a power driven screw mounted axially in the barrel bore, a driven rotor is axially aligned with and extending in a downstream direction from the downstream end of power driven screw. A series of elongated rotor flow transfer cavities are in the outer surface of the rotor. The rotor flow transfer cavities extending inwardly and are arranged in a plurality of axially aligned rows and a plurality of annular rows concentric to the axis of the rotor. A floating sleeve is coaxially positioned over the power driven rotor and interposed between the rotor and the barrel so as to be capable of independent rotation relative to both the power driven rotor and the barrel.

Abstract: The invention provides a negative-acting photoimageable composition comprising A) between about 30 and about 80 wt % based on total weight of A) plus B) of a binder polymer having acid functionality sufficient to render said photoimageable composition developable in alkaline aqueous solution, B) between about 20 and about 70 wt % based on total weight of A) plus B) of an addition-polymerizeable, non-gaseous .alpha.,.beta.-ethylenically unsaturated compound(s) capable of forming a high polymer by free-radical initiated chain-propagating addition polymerization, at least about 50 mole percent of the .alpha.,.beta.-ethylenically unsaturated moieties of B) being methacrylic moieties, and C) between about 0.1 and about 20 wt % based on total weigh of A) plus B) of a photoinitiator chemical system. Photopolymerizable component B comprises, at between about 1 and about 70 wt. % relative to total of A) plus B), a urethane oligomer having, in addition to .alpha.,.beta.

Abstract: A negative-acting photoimageable composition useful as a photoresist comprises an acid-functional binder, a photopolymerizable component, a photoinitiator chemical system comprising 9-phenyl acridine or a homologue thereof, and a dibenzoate plasticizer.

Abstract: In a negative acting photoimageable composition comprising an acid functional binder polymer, photopolymerizable .alpha.,.beta.-ethylenically unsaturated compounds, and photoinitiator, at least a portion of the photopolymerizable compounds are isocyanate trimers having tri-acrylate functionality. Further, the composition contains a dibenzoate plasticizer.

Abstract: The invention provides a negative-acting photoimageable composition comprising A) between about 30 and about 80 wt % based on total weight of A) plus B) of a binder polymer having acid functionality sufficient to render said photoimageable composition developable in alkaline aqueous solution, B) between about 20 and about 70 wt % based on total weight of A) plus B) of an addition-polymerizeable, non-gaseous .alpha.,.beta.-ethylenically unsaturated compound(s) capable of forming a high polymer by free-radical initiated chain-propagating addition polymerization, at least about 50 mole percent of the .alpha.,.beta.-ethylenically unsaturated moieties of B) being methacrylic moieties, and C) between about 0.1 and about 20 wt % based on total weight of A) plus B) of a photoinitiator chemical system, the photoinitiator chemical system comprising between about 0.005 and about 3 wt % relative to total weight of A) plus B) of triphenyphosphine and between about 0.

Abstract: An alkaline aqueous developing solution for developing photoresists or the like contains, as an anti-scum agent, an ethoxylated surfactant having the general formula:R--?O--(AO).sub.n !.sub.m --X (I)where AO are alkylene oxide units selected from ethylene oxide units (CH.sub.2 --CH.sub.2 --O) and propylene oxide units (CH(CH.sub.3)--CH.sub.2 --O) or (CH.sub.2 --CH(CH.sub.3)--O), where R is a hydrophobic group, X is H or an anionic group, m is from 1 to 3, and n is at least about 8, and the molar ratio of total ethylene oxide units to total propylene oxide units is between about 1:4 and about 4:1, preferably between about 2:3 and about 3:2.

Abstract: An alarm system for monitoring an entrance/exit from a premises is provided with a deadbolt switch, timing mechanism, alarm circuitry and an alarm indicator. The alarm system is activated when the deadbolt is unlocked. The alarm circuitry determines if the unlocking of the deadbolt was authorized or unauthorized. If the unlocking was unauthorized, the alarm indicator is activated. If the unlocking was authorized, the timing mechanism is activated. If the deadbolt is not relocked within the time period preset into the timing mechanism, the alarm indicator is activated. The timing mechanism may be reset by authorized persons to allow the deadbolt to remain open for additional time periods, one period at a time.

Abstract: Photoinitiator compositions are disclosed which contain 3,3'-carbonyl bis(7-diethylaminocoumarin); an alkyl ester of a p-dialkylamino benzoic acid; and either camphorquinone or a 2,4,5-triphenylimidazolyl dimer. Photoinitiators are also provided which contain 3,3'-carbonyl bis(7-diethylaminocoumarin); an alkyl ester of a p-dialkylamino benzoic acid; camphorquinone and a 2,4,5-triphenylimidazolyl dimer. These latter photoinitiators are particularly useful in photopolymerizable compositions which are polymerized by exposure to visible laser light.

Abstract: A mixer assembly for mixing fluid material in the bore of a barrel wherein the mixer assembly includes structure for mixing and pumping toward its outlet end the material fed thereto comprising a stator assembly fixed in the barrel having outer cylindrical surface portions conforming substantially to the surface of the bore and having a stator bore provided with a groove-interrupted inner surface, and a driven rotor member having a groove-interrupted outer surface confronting the inner stator surface.

Abstract: A screw extruder and positive displacement wave pump assembly for plasticating or melting solid plastic material or the like, including an extruder screw member in an elongated cylindrical barrel having an upstream end and a downstream or discharge end, the screw being rotatably housed in portions of the barrel adjacent the upstream end. The screw has a helical thread of plural turns integral with the core of the screw having a minimum clearance to the barrel for feeding the plastic material along the screw from its feed end to its discharge end.

Abstract: A positive displacement wave pump assembly for pumping liquid or gaseous or plastic fluids or mixtures thereof with solids or the like, including an elongated cylindrical tube or barrel having an upstream end and a downstream or discharge end, a drive shaft rotatable in portions of the barrel adjacent the upstream end, and a positive displacement wave pump is located in the barrel near the outlet end having a stator frame and a rotor member rotatable therein coupled to and driven by the driveshaft. The rotor member has an outer surface of developed helical coutour providing a plural turn helical thread of wide rounded form to position a stack of slidable sealing discs guided for diametric sliding movement by the rotor passing therethrough to form a seris of pumping pockets which progress longitudinally through the pump.

Abstract: A screw extruder and positive displacement pump assembly for plasticating or melting solid plastic material or the like, including an extruder screw member in an elongated cylindrical barrel having an upstream end and a downstream or discharge end, the screw being rotatably housed in portions of the barrel adjacent the upstream end. The screw has a helical thread of plural turns integral with the core of the screw having a minimum clearance to the barrel for feeding the plastic material along the screw from its feed end to its discharge end. A positive displacement Moineau type pump is located in the barrel near the outlet end having a stator member and a rotor member rotatable therein coupled to and driven by the screw, the stator and rotor members having confronting surfaces of developed helical contours providing helical threads of wide rounded form with a lesser number of threads on the rotor providing a series of pumping pockets which progress longitudinally through the pump section.

Abstract: Extruders are widely used to transform solid plastic materials into molten plastic materials. Because of the low thermal conductivity of plastic materials and the inefficient mixing of the plastic materials inside an extruder, the heat is not evenly distributed in the material being processed and some portion of the material emerges from the extruder with excessive heat. This invention discloses a new screw with a novel mixing section which promotes mixing of the hot, molten material with the cold, unmolten material inside the screw channel by its unique geometry, thereby improving the heat transfer from the hot, molten material to the cold, unmolten material and increasing the energy efficiency of the extruder.

Abstract: A process is disclosed for producing a positive colored image in an imagewise exposed photographic element. The element is comprised of a support having coated thereon at least one layer of a hydrophilic colloid coating containing at least one light-sensitive silver halide and, in association with said silver halide, a substantially colorless, image dye-providing compound. The image dye-providing compound is reactive with oxidized color-forming reducing agent to yield a bleachable image dye. The process is comprised of the following steps: A silver image is developed in the imagewise exposed areas of the photographic element and a low level silver fog is formed in the remaining areas of the element. Image dye-providing compound is then converted to a bleachable image dye uniformly throughout the photographic element using the silver as a catalyst for a redox reaction of a color-forming reducing agent and a cobalt(III) complex amplifier oxidizing agent.