摘要:
A control for a hydraulic propeller pitch actuator includes a low power pilot valve responsive to digital electronic input signals to control movement of a hydraulic servomotor driving a higher power servovalve. Negative feedback motion is delivered from the servomotor to both the pilot valve and the servovalve.
摘要:
A metering valve (10) having a bi-directional motor (11) with a linearly-displaceable output shaft (21) in which the shaft (21) is separated from but cooperates with a bi-directionally movable piston (16) to provide a variable flow aperture (102) in a secondary flow path (12,52,74,78,76,102,100,48) extending axially through the piston (16). Flow along a primary flow path (12,18,48,14) is varied by movement of the piston (16) in response to an imbalance of opposing hydraulic forces. The imbalance in forces results from varying the foresaid flow aperture (102) by displacing the output shaft (21). However, the flow aperture (102) is only transitorily varied by displacement of the shaft (21) since the valve (10) is designed to provide a follow-up servo function by which the piston (16) is kept at a substantially constant distance from the shaft (21).
摘要:
A large flow of high pressure fuel is supplied to a gas turbine engine by mounting a small modified vortex pump over or around a main high speed shaft. The pump includes a plurality of short, stubby impeller blades rotating at a very high speed within a fuel filled annular chamber having an axial fuel inlet and a tangential fuel outlet. A pump booster and priming system ensures the pump fills with fuel during operation.
摘要:
A large flow of high pressure fuel is supplied to a gas turbine engine by mounting a small modified vortex pump over or around a main high speed shaft. The pump includes a plurality of short, stubby impeller blades rotating at a very high speed within a fuel filled annular chamber having an axial fuel inlet and a tangential fuel outlet. A pump booster and priming system ensures the pump fills with fuel during operation.
摘要:
A high speed liquid vortex pump is fitted with an electrically controlled needle valve assembly which modulates the pressure of a small portion of the working fluid which in turn moves a spool valve to regulate the high volume, high pressure pump output flow.
摘要:
A high speed liquid vortex pump is fitted with a flexible tube in the discharge throat. The flow area of the flexible tube, and thus the pump output flow rate, is varied by surrounding the tube with a pressure modulated stream of the working fluid.
摘要:
A transponder-reader payment system includes a fob including a transponder, and a RFID reader for interrogating the transponder. The system may further include a personalization system for populating onto the fob and RFID reader identifying information and security and authentication keys which may be used during mutual authentication of the fob and the reader and for completing a transaction. In exemplary operation, the fob and RFID reader may be personalized, the fob may be presented to the RFID reader for interrogation, the fob and reader may engage in mutual authentication, and fob identifying information may be provided to the reader for transaction completion. In another exemplary embodiment, operation of the transponder-reader payment system may be controlled by an activation circuit. Further, the fob may be responsive to multiple interrogation signals.
摘要:
The Pet Waste Collection and Disposal Device is a single use Pet Waste Collection and Disposal Device comprising, a handle, and a flexible formed collector. The handle may be formed of any material sufficiently rigid to force the formed collector into the open position shown. The flexible formed collector may be fabricated of paper, plastic, or any other material of sufficient durability to withstand the stresses of opening, closing, and carriage. The user transitions The Pet Waste Collection and Disposal Device from the closed to the open state by grasping the handle and contacting the ground, or other surface, with the leading edge. Upon contacting the ground or other surface the forward motion imparted by the user causes the handle to pivot in an arc causing the flexible formed collector to open.
摘要:
The present invention relates to a process for producing an transparent or translucent transaction card having multiple features, such as a holographic foil, integrated circuit chip, RFID circuitry, silver magnetic stripe with text on the magnetic stripe, opacity gradient, an invisible optically recognizable compound, a translucent signature field such that the RFID circuitry and signature on back of the card is visible from the front of the card and an active thru date on the front of the card. The invisible optically recognizable compound is an infrared ink and/or film, which can be detected by a sensor found in an ATM or card assembly line.
摘要:
A RF transaction device is provided, which is operable to store multiple distinct data sets owned by unrelated data set owners, wherein the distinct data sets may include differing formats. The method includes the steps of: adding, by a read/write, a first data set to the RF transaction device, wherein the first data set is owned by a first owner; adding, by the read/write device, a second data set to the RF transaction device, wherein the second data set is owned by a second owner; and storing the first data set and the second data set on the RF transaction device in accordance with an owner defined format. The first and second data sets may each be stored as a Block of Binary. The first and second data sets are associated with first and second owners, respectively, and are configured to be stored independent of each other and in accordance with the particular data set storage protocol.