Abstract:
A termination device is disclosed. The termination device is comprised of a buffer and a matching device. The buffer has an input and an output. The input of the buffer is connected to the transmission line, while the output is connected to an electronic device. The matching device also has an input and an output. The input of the matching device is connected to the output of the buffer, while the output of the matching device is connected to the input of the buffer. The impedance of the output of the matching device is equal to the impedance of the transmission line.
Abstract:
A mechanism for transferring torque from a motor (12) to a gear train through a magnetic hysteresis slip clutch has a feature for disconnecting the motor (12) from the gear train. The cup element (43) of the clutch has a magnetic member (41) on its outer surface. An electromagnet (30, 31) shifts the drive gear connecting the clutch to the gear train into and out of mesh with the gear (58) in the gear train with which it engages by interaction with the magnetic member. In a preferred embodiment, the cup (43) is pulled into mesh with the gear when the electromagnet (31) is energized and magnetically applies force to the magnetic member (41), and returns to the other position when the electromagnet (31) is deenergized and does apply force to the magnetic member (41).
Abstract:
A plurality of fluid condition sensors are combined together to provide a sensor cluster that senses turbidity, temperature, conductivity and the movement of a ferromagnetic object. The plurality of sensors are attached to a substrate and encapsulated, by an overmolding process, with a light transmissive and fluid impermeable material. The sensor cluster can be disposed at numerous different locations within a body of fluid and does not require a conduit to direct the fluid to a particular location proximate the sensor. In a preferred embodiment of the present invention, a circuit is provided which monitors the signal strength of first and second light sensitive components to determine turbidity and, in addition, those signal strengths are also used to advantageously determine the most efficient magnitude of current necessary to drive a light source, such as a light emitting diode. By controlling the current to a light emitting diode as a function of the strength of light signal received by first and second light sensitive components, the turbidity sensor can be operated at a more efficient and effect level.
Abstract:
A dual complementary target arrangement is provided which enables the targets to be formed as an integral part of a cam rotatable shaft. By machining first and second radially enlarged integral portions of a rotatable shaft, complementary targets are provided which each comprises segments of differing radial dimension measured from the central axis of the shaft. By permitting the formation of the rotatable targets as an integral portion of a camshaft, the complementary targets can be incorporated as an integral portion of an automobile engine without necessitating the prefabrication of complementary targets and subsequent attachment of the targets to a camshaft. Not only does the unitary structure of the camshaft reduce the manufacturing costs of the target and shaft combination, but in certain applications it makes possible the use of complementary targets within the structure of an automobile engine where the use of individual components attached together would not be practical.
Abstract:
A computer has access to a number of data items available from at least one data source. The computer receives requests for the values of certain of these data items from a number of different clients which may be either devices external to the computer or application programs operating in a multitasking environment within the computer. As each request is received from a client, it is stored in a data item table. The computer replies to each client request in the data item table with a data item value available somewhere in the data item table. The computer updates older data item values held by the data item table by requesting those data item values from the data sources which provide them. The data item values supplied to clients are those from previously received data source replies if these replies are not too old. This reduces the number of requests for data item values which the data sources must handle, reduces traffic on a data link which might otherwide be overloaded, and reduces the delay in responding to client requests.
Abstract:
A magnetometer vehicle detector for detecting various parameters of traffic on a roadway. A number of sensors, having a compact package, along with connecting cables, may be placed in road way with a small number of standard width sawcuts. Alternatively, sensors may be placed in the roadway within tubes under the external surface of the roadway. The package design of the sensor is such that the sensor can be placed in the sawcut or tube only in a certain way or ways resulting in the most sensitive axis of the sensor being most likely affected by just the traffic or vehicles desired to be detected and measured. The sensor may be a magnetoresistive device having a permalloy magnetic sensing bridge. Multiple sensors may be placed in single or multiple lanes of the roadway for noting the presence of vehicles and measuring traffic parameters such as average speeds, vehicle spacings, and types and numbers of vehicles. Such information is processed from the shapes, times and magnitudes of the signature signals from the sensors.
Abstract:
A method and circuit to strip the composite sync from the composite video signal (112) is disclosed. This invention utilizes a phase locked loop (114) and a switchable input operational amplifier (110) to remove the sync portion of the video signal (112) without band limiting or introducing non-linearities to the video signal (112). The phase locked loop (114) creates a high frequency clock (106) from which a signal can be created that fully encompasses the sync portion of the composite video signal (112). This signal controls the switchable input op-amp (110) to select blank level during sync or allow the video to pass when sync is not present.
Abstract:
A two terminal line voltage thermostat includes a switch (22) which effectively connects line voltage to a heater load. The entire process is controlled by an integrated circuit micro-controller (10) which is powered by a rectified voltage from a transformer secondary connected to a primary which is in series with the heater load. Backup battery (11) power is provided to maintain limited functions of the micro-controller in the event of overall power loss. The micro-controller is programmed to meet the temperature sensing (18) and control requirements specific to a two terminal electric baseboard heating installation.
Abstract:
A method for calculating intervisibility data in advance of its use for permitting a real time update of threat information. Threat intervisibility data corresponding to an area comprised of adjacent regions is calculated and stored. A region of concern is centered in the adjacent regions. As the location of an aircraft changes, threats move from an adjacent region to the region of concern. However, since the intervisibility data was calculated when the threat first appeared in the adjacent region, it is now available for other functions without further processing. Such other functions include providing it to a threat avoidance algorithms or for display within the aircraft.
Abstract:
A HIGFET having a gate pad situated over a non conducting portionof the channel layer of the heterostructure wafer. The method of producing this device involves appplication of a very thin layer of gate metal on the wafer to protect the wafer surface during further processing. A photoresist coating is formed over the active area of the channel layer of the FET. An ion isolation implantation is applied to the wafer resulting in a non conducting portion of the channel layer that is not covered by the photoresist layer. The photoresist layer is removed and a thick layer of gate metal is applied on the thin layer of gate metal. The gate layers are fashioned into a pad over the non conducting portion of the channel layer and at least one finger over the conducting portion of the channel layer, resulting in the gate having minimized parasitic gate capacitance.