Abstract: A method of producing gas through liquid level detection in oil or gas wells uses various types of artificial lift systems that include sub surface gas lift, beam pumps, progressive cavity pump and submersible pumps. The artificial lift systems are controlled in response to a known liquid level within the well bore to prevent the well from pumping off and damaging the artificial lift system or from reducing the liquid level in the well bore to an unnecessarily low level to thereby increase the energy required by the artificial lift system to remove the liquid from the well bore.

Abstract: A vacuum cleaner having access panel selectively mounted thereto is shown. The access panel encloses a belt utilized to interconnect the agitation member and the drive shaft for the motor to rotate the agitation member. The access panel has a mounting flange provided on a portion of the edge of the panel which is slidably received in slots formed in the housing. The reception of the mounting flange in the slots in cooperation with a single mounting screw serves to secure the access panel to the housing. The belt can easily be accessed by removing the mounting screw and sliding the access panel laterally relative to the slots to remove the mounting flange from the slots.

Abstract: Error detection and correction circuitry, optimized to reduce the time required to correct single errors and to detect the presence of uncorrectable errors, uses an optimized H-Matrix and provides reduced logic circuitry. Correctable error syndromes are defined as comprising an odd number of ones and an uncorrectable-error detection circuit generates an uncorrectable-error indication when an even number of ones are detected. The correctable-error syndromes are defined as having a predefined combination of ones and zeros in each of a set of corresponding bit positions and different combinations of ones and zeros in other bit positions. An error syndrome comprising only zeros is designated as indicative of a no error condition. Logic circuitry is provided which implements the error detection and correction circuitry with a reduced set of logic gates.

Abstract: A container holder assembly for holding beverage containers is adapted for mounting in a vehicle. The holder includes a housing for insertion in a vehicle, the housing having an open front. Two container retaining arms are mounted in the housing for movement from a retracted position within the housing to an extended position outside the housing. The arms form at least a portion of the container holder. A door is pivotably mounted to the housing for movement between a substantially vertical closed position covering the opening in the housing and an open substantially horizontal position forming a supporting shelf for a container. An actuator comprising a cam on the door and a follower on one of the arms and mounted between the door and the arm to pivot the arm from the extended position to the retracted position as the door moves between the open position and the closed position.

Abstract: A memory sense amplifier includes a latch formed for interconnected CMOS gates with an input gate connected to one node of the latch and a reference gate connected to the other node of the latch the reference gate has an input connected to a source of reference voltage and the reference gate and input gate are activated in response to common enable signal. When the input signal, e.g., a data signal from a memory, has a signal value lower than the reference signal value when the two gates are enabled, the reference gate will discharge the node to which it is connected more rapidly than the input gate will discharge the other node. Due to the internal cross connections of the latch, the latch will rapidly change state so as to further discharge the node to which the reference is connected and further charge the other node.

Abstract: A system including a method and means for trimming capacitive-type remotely-located fuel probes that eliminates the previously-used variable trim capacitor and substitutes a rugged, inexpensive, standard-value signature resistor connected between the AC input and ground to provide "calibration offset" data needed by the fuel measurement electronics to make a determination of actual probe capacitance. The system may be applied to any such probe having a blocking capacitor in series with the probe capacitor, which blocking capacitor insures accurate measurement of the signature resistor when the leakage resistance is significant. When applied to DC or AC FHC probes, the C.sub.fhc capacitor is replaced with a non-critical DC-blocking capacitor, that is typically at least 100 times greater in capacitance value than the C.sub.

Abstract: A work space management system including freestanding walls and a freestanding cabinet integrated into the wall system and separate from the wall system. The cabinet comprises side wall and back wall channels having vertically spaced openings therein and a connector means to mount the cabinet to a vertical frame member of the freestanding walls or to another cabinet through the indented channel openings. The cabinet further comprises rear frame members having vertically spaced openings for hanging shelving or other articles. The cabinet is also adaptable for having horizontal work accessory support rails. The sides of the cabinet are mounted onto a rigid framework. Wire management capability is provided in the cabinet to interface with wire management in the freestanding walls.

Abstract: A television antenna is constructed of a flat plate antenna comprising a plurality of concentric, rectangularly shaped loops formed of conductive material and disposed on a substrate. Each loop forms an antenna for signals in a predefined frequency band within the TV frequency spectrum. An additional loop is disposed within the plurality of concentric loops and is adapted for receiving signals in the FM frequency range. Each of the loops has four sides having an electrical length equivalent to one-quarter wavelength at a center frequency within a frequency band and each side of each antenna loop is connected to a side of another antenna loop and to one of a pair of antenna output terminals. The sides of each loop are formed by conductive strips deposited on a dielectric substrate which is particularly adapted for installation adjacent a dielectric roof panel or the like.

Abstract: A method and apparatus for producing a cured elastomeric hose having an internal socket or other internal configuration formed therein and the product produced. Cured elastomeric hose can be formed having an internal socket by mounting the hose on a mandrel assembly having the desired internal configuration formed therein. An end forming cap assembly is selectively mounted on the hose and mandrel assembly, tightly engages the hose and forces the hose to assume the shape of the mandrel assembly. The hose is cured and then the end forming cap is removed from the hose through the use of an air removal tool. The product produced is suitable to receive a wide variety of articles such as an anti-splashback valve or a molded thermoplastic connector.

Abstract: Motion is detected from a surveillance monitor by means of a photosensor attached to the monitor screen and an electric circuit connected to the sensor which generates an alarm signal in response to changes in the level of an electric output signal generated by the sensor. The sensor is housed within a suction cup which is readily attached to any part of the screen and is readily movable to any desired area of the screen to be monitored for motion. The electric circuit includes comparators which detect changes in light intensity greater than a predetermined magnitude defined by a window about a preselected voltage level. The circuit includes an operational amplifier and a transistor connected to the output of the sensor and the circuit provides an effective impedance equal to the impedance of the sensing device at various levels of intensity such that the reference voltage level, for detection purposes, is the same at all levels of steady state light intensity.

Abstract: The invention is for a biopsy instrument having a stationary shaft secured to which is a stylet such that, once secured, the stylet does not move relative to the instrument. The stylet is telescopically received by a cannula which is mounted to a spring-loaded guide; the cannula and the guide move between charged and discharged positions. Also provided is a safety cap, which travels within slots formed in opposite sides of the cylindrical casing that houses the shaft, the guide and the spring. Retracting the safety cap moves the guide and the cannula from the discharged to the charged position where a release lever engages the guide. The safety cap covers the release lever to prevent accidental actuation of the instrument. The instrument is fired by sliding the safety cap forward and depressing the exposed release lever, which allows the spring to drive the cannula forward, toward the discharged position and over the stationary stylet, so that a tissue sample may be taken.

Abstract: A data processor processes data strings from memory where the data strings do not begin or end at a memory boundary. A string is defined in memory by a starting address, a byte count defining the total number of bytes in the string, and a byte offset defining the position of the first byte in the starting address location. The processor stores the byte count and decrements the byte count as each multi-byte word is processed. A byte count mask circuit generates a byte count mask which has all 1s for each byte count greater than the number of bytes per memory word. When the number of bytes remaining to be processed is below the number of bytes in a memory word, the byte count mask generates 1s only for the positions corresponding to the positions of bytes of the string in the last memory word. An offset register stores the offset defining the position of the first byte in the first memory word of the string.

Abstract: An accessory crevice cleaning tool adapted for use with a water extraction cleaning machine has a solution spray nozzle integrated therewith and a tapered, rectangular nozzle opening which does not exceed the diameter of the hose and grip tube. The spray nozzle can be adapted to provide a pinpoint spray pattern immediately adjacent the nozzle opening, a fan-shaped spray pattern which is parallel to and aligned with the longitudinal axis of the nozzle opening or a fan-shaped spray pattern which is transverse to and spaced from the longitudinal axis of the nozzle opening. Preferably, the accessory crevice cleaning tool is removably mounted to the end of the flexible hose.

Abstract: A SRCMOS sense amplifier is provided with a latch in the output stage. When a sense amplifier input signal propagates through the circuit and reaches the output stage, a reset signal is generated resetting and charging the input stage and an enable buffer stage of the amplifier to allow the input stage to begin receiving new data while previous data is latched in the output stage. An output stage reset enable is generated when data is at the output terminals of the output stage. The reset enable is combined with a clock signal in a separate output stage reset circuit to reset the circuit on a clocked basis. A further input to the output stage reset circuit is a feedback from a next circuit stage indicating that the data has been properly received in the next stage. The output stage may be reset either in response to the feedback signal from the next stage or in the presence of the reset enable and the clock signal.

Abstract: A device for separating flat objects such as sheet metal blanks has a pair of separator devices which apply a force to the edges of the objects at an angle to a normal of the plane of the objects. In one embodiment, the separator devices are screws which are rotated in opposite directions to lift opposite edges of the objects. As the object is lifted, the angle of the screws becomes more nearly vertical.

Abstract: A data processor processes data strings from memory where the data strings do not begin or end at a memory boundary. A string is defined in memory by a starting address, a byte count defining the total number of bytes in the string, and a byte offset defining the position of the first byte in the starting address location. The processor stores the byte count and decrements the byte count as each multi-byte word is processed. A byte count mask circuit generates a byte count mask which has all 1s for each byte count greater than the number of bytes per memory word. When the number of bytes remaining to be processed is below the number of bytes in a memory word, the byte count mask generates 1s only for the positions corresponding to the positions of bytes of the string in the last memory word. An offset register stores the offset defining the position of the first byte in the first memory word of the string.

Abstract: A matrix retainer apparatus for dental restorations is formed from a resilient, substantially planar main body, a pair of fines extending from the ends of the main body and retention members provided on the tines. The retention members serve to increase the coefficient of friction between the matrix retainer and the tooth or tooth reconstruction element and avoid inadvertent removal of the retainer therefrom. The invention is also directed to a matrix retainer system composed of several matrix retainers adapted for a variety of complex applications.

Abstract: An apparatus for positionally aligning two metal sheets (4, 5) along a joint during welding has a table (2, 3) provided for each sheet (4, 5), and clamping jaws (7, 8) urgeable thereagainst. An abutment (6) is provided at the joint between the metal sheets (4, 5) and extends, in an active position, up over the tables (2, 3) so as to serve as an arrest on insertion of the sheets (4, 5). The abutment (6) is lowerable to a passive position. The tables (2, 3) are movable towards and away from one another in a relative advancement movement, and the clamping jaws (7, 8) are suspended in parallelogram guides (16, 17; 22, 23) so that they are movable towards and away from the tables (2, 3). At least the one parallelogram guide has an anchorage (14) in the frame (1) of the machine so that the associated clamping jaw (8) can accompany the advancement movement.

Abstract: A cannula assembly including a tube cannula and a hollow introducer needle. At the proximal end of the cannula are three fittings: first, a first luer fitting affixed to the proximal end of the tube cannula; second, a luer fitting removably attached to the first luer fitting, this second luer fitting having a first air porous water locking plug at a proximal end penetrated by the needle; and, third, a needle handle removably attachable to the second luer fitting. The proximal end of the needle handle is blocked also by a second air porous water blocking plug. The second plug prevents escape of blood from the hollow needle upon penetration of the arterial wall. The first plug controls the rate of flow of blood to the cannula tube and allows clamping of the tube after withdrawal of the introducer needle and prior to connection to a cardioplegia supply line.