Abstract:
An anisotropic conductive compound is cured by exposing it to heat while in the presence of an AC magnetic field followed by a static, substantially homogeneous DC magnetic field.
Abstract:
A proportional solenoid-driven valve control assembly contains a moveable, magnetic armature positioned adjacent to one end of a fixed pole piece that protrudes from a solenoid bore and is supported by means of a pair of flat suspension springs adjacent to the one end of the bore. The movable armature is configured to provide two generally cylindrical radial magnetic flux paths. One flux path traverses a radial gap at one end of fixed magnetic pole piece that protrudes from the one end of the solenoid bore. The other flux path traverses a generally cylindrical gap between a rim portion of the armature and an inwardly projecting magnetic element of the solenoid housing. The two radially separate cylindrical gaps function as coaxial guide air-bushings for the moveable magnetic armature that prevent off-axis play between the moveable armature and the pole piece and the inwardly projecting magnetic element.
Abstract:
A portable signal transfer unit for relaying a signal representative of physiological data of a mammalian subject from a remote physiological sensor to a remote receiver unit. The portable transfer unit includes an input device which operably receives the signal, a memory for buffering the signal, and an output device which wirelessly transmits the signal to the remote unit. The signal transfer unit also includes a signal processor for relaying the signal from the signal input to the output device, wherein the signal processor has two or more receivers each receiver adapted to handle a specified signal carrier frequency. An indicator is also provided which indicates to the subject whether the signal transfer unit is within range of the remote unit to enable effective transmission of the signal from the signal transfer unit to the remote unit.
Abstract:
One embodiment of the present invention provides a system that supports recovery in the event a previous process holding a lock used for mutual exclusion purposes loses ownership of the lock. This loss of ownership may occur due to the previous process dying or the lock becoming unmapped. Under the present invention a process first attempts to acquire the lock. If the attempt to acquire the lock returns with an error indicating that the previous process holding the lock lost ownership of the lock, the process attempts to make program state protected by the lock consistent. If the attempt to make the program state consistent is successful, the system reinitializes and unlocks the lock. Otherwise, the system marks the lock as unrecoverable so that subsequent processes attempting to acquire the lock are notified that the lock is not recoverable. One aspect of the present invention includes receiving a notification in an operating system that a process died, and determining if the process died while holding a lock. If the process died while holding the lock, the system marks the lock to indicate to subsequent acquirers of the lock that a previous holder of the lock died, and unlocks the lock so that other processes may acquire the lock. According to one aspect of the present invention, if the attempt to acquire the lock returns with an error indicating the lock is not recoverable, the process performs operations to work around the program state that is inconsistent, and reinitializes the lock.
Abstract:
A proportional solenoid-driven valve control assembly contains a moveable, magnetic armature positioned adjacent to one end of a fixed pole piece that protrudes from a solenoid bore and is supported by means of a pair of flat suspension springs adjacent to the one end of the bore. The movable armature is configured to provide two generally cylindrical radial magnetic flux paths. One flux path traverses a radial gap at one end of fixed magnetic pole piece that protrudes from the one end of the solenoid bore. The other flux path traverses a generally cylindrical gap between a rim portion of the armature and an inwardly projecting magnetic element of the solenoid housing. The two radially separate cylindrical gaps function as coaxial guide air-bushings for the moveable magnetic armature that prevent off-axis play between the moveable armature and the pole piece and the inwardly projecting magnetic element.
Abstract:
The present invention describes a method for detecting thickness measurement error of a film mounted on a wafer substrate. The method comprises exposing a film to be measured to electromagnetic waves over a range of incident wavelengths, reflecting the electromagnetic waves from an outer surface of the film and from the film-substrate interface so that said reflected electromagnetic waves interfere with one another, and measuring an intensity of the reflected electromagnetic waves. A reflected intensity curve is then computed over the range of incident wavelengths and then compared to a theoretically calculated reflected intensity curve to obtain a goodness of fit (GOF) measurement. The above process is repeated at a plurality of different locations on the wafer to obtain a plurality of GOF measurements for the wafer. Minimum and maximum GOF measurements are determined from the plurality of GOF measurements obtained. If anyone of these GOF measurements are less than a prescribed amount, such as 0.1, then an order skipping error has been detected. Additionally, if the ratio of the minimum GOF to that of the maximum GOF is less than a predetermined amount, such as 0.6, then an order skipping has been detected and the measurement value should be rejected.
Abstract:
A dual pressure regulator device for a spray gun is supplied with an input fluid under pressure and outputs a first regulated pneumatic pressure to a pressurized tank, and a second regulated pneumatic pressure to the spray gun. The dual pressure regulator device has a unitary body having a fluid passageway extending from an inlet port at a first end of the body, to which inlet port the input fluid is supplied, to a first valve chamber in which a first regulator valve is installed, and to a second valve chamber in which a second regulator valve is installed. The pressure in the nozzle device's main pressure internal line and the head pressure within the tank are maintained within specified tolerances, independent of pressure fluctuations in the main supply line to the nozzle device. The body has an inclined body wall portion that is conformal with the handle, such that the valve assemblies are physically accommodated and accessible in a space directly beneath the handle, adjacent to the tank.
Abstract:
An electrostatic precipitation system (100) utilizes laminar flow of a particulate-laden gas in order to enhance the removal of sub-micron sized particulates. The system incorporates a vertically oriented housing (105) through which the gas flows downwardly therethrough to a lower outlet port (110). The gas, which may be a flue gas enters the laminar flow precipitator (102) through an inlet port (108) for passage through a charging section (104). The charging section (104) imparts a charge to the particulates carried by the flue gas. The flue gas and charged particles then flow to a collecting section (106) which is downstream and below the charging section (104). The collecting section (106) is formed by a plurality of substantially parallel tubular members, each tubular member defining a collecting passage therein. Each tubular member (118) is electrically coupled to a potential that is of opposite polarity to that imparted to the particulates, so as to attract the charged particulates to an inner surface thereof. The collected particulates are subsequently collected in a hopper (112) or reetrained in the gas stream as agglomerates for subsequent removal from the gas by a secondary filter, the gas stream then being conveyed to a stack (14) wherein the particulate-free gas can be emitted into the atmosphere.
Abstract:
A solenoid-controlled fuel injection device, particularly useful for injecting non-Newtonian types of fuel materials, such as coal slurry, to a preburn chamber of an internal combustion engine, comprises a wet-type solenoid unit and a vortex valve unit integrated together in a modular configuration. The solenoid unit contains a magnetic coil surrounding a coaxial control fluid-sealing bore through which a cylindrical armature is translated. The armature has a coaxial armature stem which is engaged by the valve stem of the vortex valve unit. The vortex valve stem is supported on a compression spring within the longitudinal bore of a valve body, coaxial with the bore of the solenoid unit and engages a poppet valve seat adjacent to a vortex valve element. A control fluid supply inlet is coupled to the longitudinal bore, while a fuel supply bore is coupled to a fuel input port to the vortex chamber of the vortex valve. Until the coil is energized, the valve stem is spring-biased away from the valve seat, so that control fluid in the longitudinal bore is directed into the vortex chamber, to prevent fuel from being supplied from an outlet nozzle. When the coil is energized, the armature translates the valve stem against the spring bias, to contact the poppet seat and cut off control fluid to the vortex valve, whereby fuel is injected via the nozzle at the vortex chamber output port.