Abstract: A motionless mixer tube for mounting on the end of a discharge nozzle of a dispensing device for mixing and dispensing extremely small volumes of a pair of liquid materials, such as chemical reacting resins. The mixer tube has an elongated housing with a female luer lock at one end for mounting the tube on the dispensing device, and a male luer lock on the other end for easily mounting a dispensing needle on the outlet end of the housing. A helical motionless mixer element is mounted in a bore of the tube housing and extends from immediately adjacent the outlet end of an inlet socket of the female luer lock to immediately adjacent the outlet end of a discharge nozzle of the male luer lock. The dispensing needle is mounted immediately adjacent the outlet end of the discharge nozzle and mixer element. This arrangement avoids dead spaces within the mixer tube to prevent the formation of disruptive air bubbles therein and enables secure and rapid attachments at both ends of the tube.

Abstract: A line leak detector system that requires no existing piping modifiction for installation. The system consists of a controller and transducer and installs at existing fuel dispensers. The two components are connected by a length of electrical cable. The invention detects leaks in underground pressurized piping systems for fuel products and other incompressible liquids. The system performs three levels of leak detection, broken pipe, 3 gph and 0.2 gph. Existing piping system variables relating to bulk modulus, variable pump off pressure and thermal differential between fuel and piping with surrounding soil influence, are compensated for. The status of the leak test is reported by encoded lights and horn. In various combination of flash, blink and steady state lights, plus chirp or audible horn. The transducer and cable are intrinsic safe, permitting installation in hazardous environments.

Abstract: An apparatus for supporting a person at a preselected height on a stanchion has a floor member and a frame member that attaches to the floor member. A seat hingingly attaches and selectively locks to the floor member. A support member, having a piercing member, attaches to the floor member. A sound reducing means is located in the support member. An attachment device connects to the floor member. An adjustable tightening means adjustably attaches to the attachment device at one end and attaches the frame member at the other end to adjustably tighten the attachment device. A gripping means attaches to the frame member to reduce sliding of the apparatus down the tree.

Abstract: A positive displacement material mixing, metering and dispensing device having a housing with a pair of material inlet ports, and a pair of material outlet ports which are in communication with a pair of holding cavities, and a pair of valve chambers. A spool is slidably mounted in each of said valve chambers. An air actuated piston is in contact with opposite ends of the spools. Each spool has a reduced diameter central portion which communicates with a respective one of the material holding cavities at all times, but is in communication with the inlet and outlet ports only at discrete positions in the operating cycle and is never in communication with both the inlet and outlet ports simultaneously. One end of a pair of push rods moves into and out of the material holding cavities, with the other ends of the push rods being simultaneously actuated by an air piston.

Abstract: The present invention relates to a dispensing device comprising a housing containing at least three pressure chambers. The upper pressure chamber being separated from the middle pressure chamber by a reciprocating upper piston composed of a head and a stem. A lower piston is reciprocally positioned between the middle and lower pressure chambers such that pressurization of the lower pressure chamber exerts upward pressure on the lower piston and pressurization of the middle pressure chamber exerts downward pressure. The lower piston is fixed to a reciprocating rod which has a dispensing rod tip. The dispensing rod tip is slidably situated within a dispensing tube which has a tube opening for introduction of a dispensible material therethrough. The dispensing rod tip is reciprocatable between an upward, downward and intermediate position. In its upward position, a tube opening is non-occluded, thereby allowing the dispensible material to enter a dispensing tube.

Abstract: A hazardous gases detector that is completely self contained and small enough to fit into small diameter pipe bores. The system is housed in two sealed enclosures, one housing the detection circuits and batteries and the other the signal output. The two components are connected by a length of electrical cable. The invention detects BTX vapors in monitor well bores or piping connected to the detection volume of dual walled underground fuel storage tanks. The signal output end of the invention caps the well or conduit and suspends the sensor end in the well bore or conduit. The detection circuit and battery end is suspended ten feet or more below the gound level and thusly ensures uniform temperature, and thus stable performance of the detector. Circuits that time vapors sampling interval provide long term operation from a battery comprised of six standard "D" size cells, leak detection is signaled by blinding lights and horn, with two weeks of signal capacity in the battery, a minimum.

Abstract: A method and system for decoding time-varying, two-frequency, coherent-phase data, such as data from the stripe on a magnetic stripe-bearing medium, includes detecting flux intervals at the beginning of a bit cell of such data; timing with a clock or counter the length of such a bit cell; digitally determining the average length of at least the two bit cells immediately preceding the cell being measured; and digitally determining whether or not another flux reversal lies at or near the midpoint of the bit cell being decoded.

Abstract: Magnetic stripe media reader/encoders include reader/encoder body modules made of two complementary body elements that provide a track or path for guiding a magnetic stripe-carrying medium over a magnetic reader head, and magnetic head-carrying devices for magnetic stripe medium reader/encoder magnetic heads including a magnetic head-holding frame linked to a gimbaling frame-and-shaft combination linked, in turn, to a springy mounting mechanism.

Abstract: A servo booster mechanism (18) having a piston (48) responsive to movement of a plunger (84) by an input signal for controlling the rate of fluid flow past a seat (82) into a passage (80) for distribution to the surrounding environment. A first restrictor (75) creates a first pressure drop in a supply fluid pressure P.sub.s to present an operational chamber (46) with fluid at a pressure P.sub.x. A second restrictor (openings 74-76) creates a second pressure drop in fluid pressure P.sub.x supplied from the operational chamber (46) to present control chamber (88) with fluid at a pressure P.sub.h. The difference in pressures combine to act on the piston (48) and plunger (84) to provide a constant force at stem (26), which provides a feedback to the input member (12), and provide a linkage (22) with a force to hold a position sensor (24) in a stationary position.

Abstract: A digital sample and hold circuit for memorizing the initial voltage across an electrical resistance probe which is partly immersed in the liquid in a tank.

Abstract: In a disc data store, wherein a read/write head is radially positionable by a feedback servomechanism to interact with a selectable one out of a plurality of radially equispaced data storage tracks on a rotary disc, the positioning errors resultant from phase errors between the plural signals available as the output of an optical grating head position transducer are eliminated by replacing one of the data storage tracks with a servo track by arranging that the period of the recursive, triangular wave position indicating signals from the transducer is equal to twice the radial spacing between tracks on the disc, by selecting as the exclusively-used position indicating signal that one of the plurality of transducer signals which brings the head to the center of the servo track with least offset, and, while employing that selected signal or its generated inverse as the feedback signal to the servomechanism applying that least offset as a correction when positioning the head over data storage tracks.

Abstract: A material dispenser for dispensing a flowable material from a non-pressurized reservoir having a bore therethrough. A resilient pinch-off tube is removably fitted within the bore. The flowable material reservoir is connected to one end of the tube. At least one dispensing nozzle or needle is coupled to the other end of the tube. Within the dispenser is a mechanism for selectively squeezing the tube to force selected amounts of the flowable material out the needle, and then to draw material from the reservoir into the tube to fill the tube and/or any residual amount of the material in the needle back away from the distal end of the needle thereby to eliminate dripping.

Abstract: An offset compensated electronic current sensor and controller for automatically controlling the extension and retraction of a power antenna with the energization and de-energization of an automobile electronic search tune radio receiver.

Abstract: A process for making sulfur-modified neoprenes, wherein chloroprene, which may be mixed with up to 20 weight percent of another unsatuated, organic monomer, is polymerized in an aqueous, alkaline emulsion in the presence of about 0.25-0.45 part of sulfur per 100 parts of total organic monomer to a conversion of at most 74%; peptization is initiated by adding to the resulting latex 0.3-1.5 parts of tetraethylthiuram disulfide or another tetraalkylthiuram disulfide, then adding sodium dibutyldithiocarbamate or another water-soluble dialkyldithiocarbamate in a ratio to tetraethylthiuram disulfide of at least 0.8:1; and peptization is contained until it is about 85-95% complete. The polymer then is isolated. Neoprenes made by this process have, when vulcanized, outstanding heat and flex resistance and superior tensile properties, tear strength, and compression set.

Abstract: A flowable material dispenser having a bore therethrough. A resilient pinch-off tube is removably fitted within the bore. A flowable material reservoir is connected to one end of the tube. At least one dispensing nozzle or needle is coupled to the other end of the tube. Within the dispenser is a mechanism for selectively squeezing the tube to force selected amounts of the flowable material out the needle, and then to draw any residual amount of the material in the needle back away from the distal end of the needle thereby to eliminate dripping. Connected to the squeezing mechanism is a control system for sequencing the squeezing operation to perform the method of the invention which includes the steps of filling the tube with material, isolating a portion of the material in the tube from the reservoir, dispensing a portion of the isolated material, drawing the remaining portion of the isolated material in the needle back away from the distal end of the needle, and refilling the tube with material.