Abstract:
A method and apparatus is disclosed which employs a pulse-controlled microdroplet fluid delivery system for precisely dispensing fragrances and other odor producing vapors. The pulse-controlled fluid delivery device is capable of ejecting microdroplets of fluid with a diameter less than 350 micrometers at a controlled ejection rate based upon ink-jet printing technology. The pulse-controlled fluid delivery system includes mechanisms for vaporizing the fluids and delivery of the vapors to the nose, which is controlled by a programmable system controller capable of real time data-driven dispensing with a multi-fluid capability. Synthesis of custom fragrances is made possible by a multijet programmed control system which adjusts dispensing rates of components. Calibration of a prior art “electronic nose” is disclosed. A precise calibration gas is produced in real-time to counteract the effect of drifting.
Abstract:
A more reliable and precise method of determining the olfactory threshold is provided by a digitally operated apparatus that dispenses controlled amounts of a volatile test fluid from a digital jetting device of the type used for ink jet printing. A precise number and size of micro droplets are dispensed onto a heater which vaporizes the fluid at a test location where a patient can sniff and report whether the odor is sensed. Incremental adjustments are made to determine the approximate threshold of olfactory perception of the odor. Sensors are included to verify dispensing and to coordinate dispensing with breathing.
Abstract:
A carrier film has one or more openings or wells loaded with a meltable absorbing substance for absorbing laser energy. The carrier film has a clear film which covers one side of the opening containing the absorber substance and the open side of the opening in the carrier film is positioned adjacent to the skin and irradiated through the clear cover film by a laser beam. The melted laser energy absorbing substance is ejected to form a spot laying on the skin. After moving the carrier film, a laser beam impinges the spot thereby raising a tiny blister on the skin containing interstitial fluid. The interstitial fluid is collected for diagnosis and analysis. A method of making and loading the carrier film with a digitally operated dispenser of the type used for ink jet printing is disclosed. Special construction of the opening appears to enhance ejection.
Abstract:
A driver circuit for magnetic gages that electrically simulates the gage, both with and without a parallel resistor joined in conjunction therewith. An averaging circuit assists in preventing the circuit from responding to transient variations in the monitored parameter.
Abstract:
Apparatus for controlling a vehicle climate control system having pneumatic passages provided with doors or baffles to regulate the flow of conditioned air to the passenger compartment. The passage or passages are selected by positioning a valve that couples a pneumatic source to one or more of the door or baffle operators. The position of the valve is determined by an electric motor that has applied thereto an energizing voltage from a control bridge circuit which also has applied thereto a feedback voltage which changes in response to operation of the motor. Movement of the valve to a selected position causes the feedback voltage to equal the energizing voltage, whereupon the motor is deenergized and movement of the valve terminates.
Abstract:
A process and apparatus for treating coal to produce micron-size coal particles having high surface reactivity and a low level of ash-forming impurities. The process involves grinding the coal in a substantially air tight fluid energy attrition mill to form a hydrophobic coal-fraction and a hydrophilic impurities-fraction, and separating the fractions by virtue of the impurities-fraction's affinity for water.
Abstract:
A fluid energy grinding mill having a hollow vessel providing a central cylindrical core zone and a peripheral annular zone both disposed beyond a grinding zone at one end of the vessel. Carrier medium is injected into the grinding zone to generate a vertically-flowing vortex in the core zone. At the other end of the vessel, a first portion of the flow from the vortex is recirculated in a counter flow through an annular peripheral zone surrounding the core zone to interface with injected carrier medium in a grinding zone. A second portion is discharged through a central opening in the other end of the vessel. Particulate material is fed into the recirculating flow so that it may be comminuted in the grinding zone. In the vortex, the particulate material is classified by centrifugal action and the coarse particles are recirculated. The particles ground to the desired mass are discharged with the second portion of the carrier medium which is not recirculated. Several forms of regulation are disclosed for regulating the upwardly-flowing vortex and the portion of the flow which is recirculated. Guide means and deflectors are disclosed to assist in directing the particulate material to follow the desired path.
Abstract:
A wheel lock control system for a vehicle is described that is responsive to wheel speed to provide a brake release signal when the wheel speed signal characteristics represent an incipient wheel lock condition. The braking forces on the vehicle wheels are relieved by the wheel lock control system for the duration of the brake release signal. A monitoring circuit monitors selected system parameters and provides a fault signal while the parameters represent a fault condition. A logic circuit is responsive to the fault signal and the brake release signal to provide an inhibit signal which is initiated solely by the fault signal and terminated only when both the fault and the brake release signals are terminated so that the inhibit signal exists only for the duration of a temporary fault occurring during time periods other than during a brake release signal and exists for the duration of the longer one of the fault signal or a brake release signal if the fault signal coexists at least momentarily with the brake release signal. The system is inhibited from releasing the vehicle wheel brakes during the period of the inhibit signal.
Abstract:
An anti-lock brake control circuit compares the deceleration of a braked wheel with a deceleration reference and integrates the difference when wheel deceleration exceeds the reference deceleration. A resulting velocity error signal is compared with a velocity error reference and a release signal is generated while the velocity error signal exceeds the velocity error reference. Adaptive control is provided by a first order lag circuit having wheel velocity as its input and which supplies a variable portion of the deceleration reference having a slope approximately equal to the slope of the vehicle velocity profile during braking on low coefficient surfaces and having a slope less than the slope of the vehicle velocity profile during braking on high coefficient surfaces. An initial cycle and pulse circuit sets the velocity error reference to a high level for both the first cycle of anti-lock brake operation and for a time period after each brake application during anti-lock brake operation.