Abstract: A linear electromyographic biofeedback system operates over a dynamic range of at least one thousand to one. That is, the system remains linear from input levels of approximately one microvolt to input levels in excess of one millivolt. The linear electromyographic biofeedback system includes a sensitive transducer which is followed by a protection circuit and connected to a differential amplifier for eliminating common mode noise. The output of the differential amplifier is filtered and amplified to further eliminate unwanted signals. This filtered signal is rectified and averaged in a third order averaging filter to obtain a close approximation of a time averaging without the necessity of discrete timing periods.

Abstract: The combination of a pressure-switch operated vibrating motor, enclosed within a cushioning material, such as synthetic or natural foam, having an enlarged surface area relative to that of the motor. As a person applies pressure on said enlarged cushioning means, as by leaning on the cushion, the pressure switch is engaged to close a circuit thereby starting the vibrating motor enclosed within the cushioning means. The cushioning means acts as a damping means for the vibrating motor for greater comfort than would otherwise occur if the vibrating motor were not so enclosed.

Abstract: An orthopedic device comprising a plastic sheet member having one side covered with a thin protective layer which is substantially thinner than said plastic sheet member and the other side covered with an insulating layer, e.g., fabric or foam. The plastic sheet member has a tensile strength of at least 2,000 psi. The orthopedic device is formable at temperatures above about 120.degree. F.

Abstract: The instant invention relates to a novel water resistant orthopedic bandage which includes a hardenable plaster of Paris composition, including a reactive silicone polymer supported on a flexible carrier. The amount of plaster of Paris may range from 100 to 600 grams per square yard of carrier, preferably from 396 to 425. The amount of reactive silicone may range from 0.5 to 20 parts per hundred parts plaster of Paris, preferably from 0.5 to 10, e.g. about 4 parts silicone per 100 parts plaster of Paris. The novel orthopedic bandages of the instant invention show improved water resistance throughout the curing cycle of the bandage. Also, when compared to the prior art plaster of Paris bandages the instant bandages have improved "green strength".

Abstract: A respirator is sealed at its sides to the face of a wearer by seals or air flow restricting members comprising a multiplicity of bristles. The length of the bristles is chosen so that they are deflected to lie at their free ends against the wearer's face. The length resilience and packing density of the bristles is selected to provide a required resistance to air flow. The bristles are of horse hair, camel hair, nylon, polypropylene or other noninjurious material. Preferred bristle diameters are 0.03 to 0.25 mm and lengths 10 to 30 mm.

Abstract: The retainer portion of the mouthpiece of an underwater breathing apparatus includes at least a portion made of a thermoplastic material. The retainer is customized to the bite of the user by heating the mouthpiece to render the retainer plastic. The retainer, while plastic, is gripped by the teeth of the user to form an impression of the user's bite in the thermoplastic material of the retainer. In one embodiment, the thermoplastic portion of the retainer comprises only a sleeve of thermoplastic material which is affixed over the conventional rubber retaining member. In an alternative embodiment, the thermoplastic retainer is formed as an integral molded portion of the mouthpiece.

Abstract: ECG signals from two approximately orthogonal leads are combined in a rectangular-to-polar coordinate converter to obtain signals representing the magnitude and angle of the vector. The vector angle existing at the instant the magnitude of the QRS vector reaches its peak is first identified, and a voltage corresponding to the vector angle is sampled and stored for later use. Secondly, the vector angle existing at the instant the magnitude of the T-wave vector reaches its peak later in the cardiac cycle, is identified, and a voltage corresponding to this second vector angle is sampled and stored. The voltages representing the QRS and the T-wave vector angles are then applied to a differential amplifier to obtain a difference voltage representing the angular difference existing between the two maximal vectors. This angular difference possesses certain characteristics which are diagnostically significant. A classifying circuit determines which one of a number of angular ranges the angular difference falls into.

Abstract: A respiration mask comprising a mask portion and a heat exchanger through which inhalation and exhalation air flows for the recovery of humidity and humidity contained in the exhalation air. The heat exchanger consists a continuous strip of wire netting wound helically to form a cylindrical netting roll comprising several turns. The flow of air takes place radially through the netting roll.

Abstract: A flow meter for liquids comprising two tubes interconnected at their lower ends, one tube providing an inflow passage for liquid from a supply container and the second tube having an opening at its upper end. A thin orifice disc in sealing engagement with lower portions of the tubes has an orifice through which liquid flows, the rate of flow being governed by flow control means associated with a set incorporating the flow meter. The tubes are enclosed within a drip chamber having an outlet at its lower end. Indicia associated with the second tube mark the various flow rates. In another form of the device, a third tube adjacent the second tube and connected by their top portions with a passageway has a second orifice at its base and second indicia so that a flow meter with an extended flow rate capability is obtained. The flow meters provide greater accuracy in flow rates and the flow rates are only minimally affected by solutions of widely differing viscosities.

Abstract: This invention relates to a novel apparatus useful for the gravity fed delivery of a liquid from a first liquid reservoir to a second liquid reservoir. This apparatus is especially useful for the administration of intravenous (I.V.) solutions, where a constant flow, despite varying conditions of pressure in said second fluid reservoir (i.e. the blood-stream of the patient) is desirable if not absolutely required.

Abstract: A blood tube communicating with a blood bag includes means for parting the blood tube, and exposing an internally mounted needle carried by and communicating with the blood tube for penetrating a closure of a sample tube. In accordance with this invention, the above is accomplished by means of an integral plastic member which is positioned to sealingly enclose an interrupted portion of the flexible blood tube and the needle. The plastic member includes a thin-walled, frangible portion positioned to permit separation of the plastic member into two pieces by breaking of the frangible portion to expose the needle for use, and to permit the blood tube to be separated. Manually operated means are also provided for shutting off flow through the blood tube at a point on the opposite side of the plastic member from the blood bag.

Abstract: A method and instrumentation for sterilization of females has been devised in which one or more hypodermic needles can be inserted into the uterus to a predetermined position or location at the uterine cornu and the internal tubal ostra followed by injecting a sclerosing agent which produces a chronic lesion at that point. The entire needle assembly is characterized by slidable mounting of the needle or needles within a guide or sleeve projecting forwardly from a disposable cartridge, and a hand-held actuator is provided to selectively control successive advancement of each needle through the needle guide into the tissue and advancment of the ampule or cartridge to force the sclerosing agent or other medicament through the needle. Thereafter, the needle assembly may either be withdrawn or relocated to another position for injection of medicament through the same or other needle advancing through the same needle guide into the opposite cornul portion.

Abstract: A self-contained, combined irrigator and evacuator for wounds comprising a container and a resilient inflatable bladder within the container, the container and inflatable bladder having a combined configuration which avoids unnatural deformation of the inflatable bladder by the container in at least one direction of expansion. The bladder is expanded against its bias by filling with an irrigation fluid, the bias causing pumping of the fluid from the bladder to the patient for wound irrigation while simultaneously effecting a negative pressure in the container for evacuation of fluid from the wound site and collection of the evacuated fluid in the container.

Abstract: Alloy fibers having high fluid-holding capacity, and a method for making the same, the alloy fibers being comprised of a matrix of regenerated cellulose having polyvinylpyrrolidone dispersed therein. The polyvinylpyrrolidone may be present in combination with an anionic polymer.

Abstract: A disposable diaper is provided with adhesive tabs having gripping means to facilitate separation of the tab from release means preparatory to fastening the diaper about an infant. The adhesive tabs comprise a backing web which extends around and receives a marginal portion of the diaper, and a face web having continuous coating of adhesive on one face and a grippable adhesive-free region at one end. The face web comprises a fixed end permanently attached to one leg of the backing web, and an adhesive-coated free working portion situated between the fixed end and the grippable adhesive-free region. When the tab fastener is in a storage position, the free working portion is releasably attached to release means provided on the other leg of the backing web and the adhesive-free region extends inwardly from a lateral margin of the diaper and beyond the release means, so that it can be gripped for separating the free working portion from the release means when securing the diaper about an infant.

Abstract: The disclosed article (e.g. a sanitary napkin) typically comprises (1) an elongated absorbent pad, (2) an outer covering layer in adherent contact with at least one surface of the pad, (3) an adhesive strip or layer on the exposed surface of the outer layer, and (4) a release liner for protecting the adhesive layer. The adhesive layer is useful for removably attaching the article to the inside of an undergarment or the like. Production of the article can be greatly simplified by using a hot-melt pressure sensitive adhesive (PSA) as the adhesive layer. However, the rubbery base for the hot-melt PSA should be very carefully selected. Two types of rubbery polymers provide good results, i.e. (a) an A-B-A block copolymer having polystyrene end blocks and a rubbery poly(ethylene-butylene) midblock and (b) a radial teleblock copolymer with branches having polystyrene terminal blocks and a butadiene segment in the center.

Abstract: Apparatus for use in surgically removing tumorous neurological tissue comprises a handpiece in which a tool tip vibrating transversely to its long axis in the ultrasonic range, is mounted an irrigation fluid outlet for introducing fluid adjacent the tool tip to flush the operative site, and a fluid inlet adjacent the tool tip for withdrawing a fluid mixture from the site.

Abstract: Electrode apparatus which is used with stimulation devices such as cardiac pacemakers or the like, and which has tissue-engaging members that are selectively retractable from tissue engagement without tearing or otherwise damaging the tissue. One or more tissue-engaging members is retractably mounted within the electrode body. Retraction or extension of the tissue-engaging member is accomplished with an elongated tool which is extendable through the hollow coil that attaches to the body of the electrode apparatus. In one embodiment of the electrode apparatus, the tissue-engaging members are non-rotatably extended and retracted from the apparatus, thereby further minimizing the possibility of damage to body tissue.

Abstract: A catheter type electrode member for an implantable pacemaker, insertable from without from the epicardium into the heart muscle for cardiac stimulation, of the type comprising a holder of dielectric elastic material including a stem terminating in an enlarged resilient pad having the shape of a platform. One major surface of the platform pivotally supporting an arcuately curved electricity conducting hook, which projects out of said pad and has its tip portion pointing back towards said major surface and preferably two spaced apart anchoring needles likewise projecting out from said major surface, conveniently in a diverging manner. Upon insertion from the outside through the epicardium of the hook into the heart muscle by a tool gripping the hook, release of the hook allows the elastic pad to expand against the outer heart surface at the same time as the anchoring needles are made to penetrate also into the epicardium, thereby positively anchoring the electrode member in position.

Abstract: An atrial lead assembly is provided which is adapted for curving into position within the atrium, the lead having a flexible length without any preset curve, and comprising stylet means for introducing a curve into the distal end of the lead. The stylet enables the operator to set the axis of the lead along a curvilinear path adjustable by the operator. The lead has a tip of a continuous helical type adapted to be rotated into contact with the trabeculae, the lead being rotatable about the stylet while the stylet maintains the lead axis in a desired position, whereby the tip is caused to engage the trabeculae. After such engagement, the stylet can be removed, leaving the lead tip in good fixation with the atrial wall.

Abstract: A rotor for an axial flow type combine has a generally cylindrical main body portion with a pair of rasp bars mounted longitudinally thereon. The forward portion of each of the rasp bars is inclined outwardly and rearwardly to provide an infeed spacing between the forward portion of the rotor and associated concave which will accommodate abnormal masses of crop material and function to thin out these masses prior to further axial movement of the crop material rearwardly into the threshing and separating region of the rotor.

Abstract: A hair roller is described having first and second flexible, generally planar roller members which are hinge coupled and are deflectable from a generally planar configuration into a body having a generally cylindrically shaped configuration. Edge segments of the members are preformed to have arcuate cross sectional configurations for causing the hair roller body to conform to a circular cross sectional configuration.

Abstract: An improved hair roller is disclosed which is adapted to be stored in a substantially flat configuration and to be expanded into a body having a cylindrically shaped configuration which is substantially resistant to bending and buckling. The hair roller comprises first and second sleeve shaped bodies, one of which is dimensioned to be telescopically positioned within the other and the bodies are adapted to be mutually rotated for forming and maintaining a cylindrically shaped configuration.

Abstract: The device comprises an annular case having a first portion which projects from the wall and a second portion which is embedded in the wall. A tubular element connected to two pipes of the piping defines a passage through the case. The tubular element has a first section and a second section respectively located in the first portion and second portion of the case. The tubular element is of a material which is rigid at ordinary temperature and softens under the action of heat. At least the first section is of a fusible material having a distinct point of fusion. The first portion of the case is provided with means for instantaneously closing the passage as soon as the first section has disappeared. The second portion of the case is filled with a material which swells radially under the action of heat.

Abstract: A system for preparation of variable hemodialysate in which a controllable pump meters multiple fluid sources of dialysate concentrates and water in controlled proportion. The system includes a plurality of cylinder and piston pump assemblies linked together for simultaneous operation. Individual valves connect the separate pump assemblies to the individual fluid sources to be proportioned. A position sensor provides signals indicative of the position of the pistons throughout their stroke cycle, and with a control operates the control valves associated with the individual pump assemblies in accord with functions of piston position and preselected proportioning control inputs, so as to control the volume of fluid metered by each of the pumps during the pump stroke.

Abstract: The specification discloses a flange valve having a metal valve body with a longitudinal central passage therethrough and annular flanges extending outwardly from the ends thereof. A truncated ellipsoid valve member is located in the central portion of the passage, the ellipsoid member having major and minor axes and being truncated at the opposite ends of the major axes. An aperture is formed through the ellipsoid member along the major axis. Annular resilient seats are disposed on opposing sides of the valve member to provide sealing between the interior of the valve body and the exterior of the valve member. A pair of removable annular liners are dimensioned to closely fit within opposite ends of the central passage of the valve body and include end portions abutting the resilient seats. The liners are constructed from non-corrosive material to prevent corrosion of the valve body.

Abstract: A floating seat ring for a gate valve structure has an external pressure source to move the seat ring into engagement with the gate valve. A pocket for the seat ring is formed by a counterbore in the valve body and a tubular insert is inserted within the valve body bore extending within the seat ring. This inner end portion of the tubular insert defines with the counterbore the pocket for the seat ring for floating back and forth movement. An external pressure source is in fluid communication with the pocket behind the seat ring to move the seat ring outwardly.

Abstract: A pilot operated ball cock valve for controling the height of fluid in a tank. The rotary pilot valve has an inlet port and an outlet port which are interconnected and communicate with a fluid channel which bypasses an evacuation chamber and a diaphragm valve permitting fluid to flow directly to the inlet port of the rotary pilot valve. The outlet port of the rotary valve is positioned by a predetermined fluid height in the tank into alignment with a fluid channel which transmits fluid pressure into a pressure chamber above the diaphragm. Such positioning allows fluid pressure to act upon the diaphragm which closes a discharge orifice thereby preventing flow of fluid into the tank. A decrease in fluid height in the tank induces the rotary pilot valve to rotate such that the outlet port will move out of alignment with the fluid channel leading into the pressure chamber.

Abstract: In a sealed fluid reservoir for a hydraulic brake master cylinder, inlet and outlet check valves are compactly assembled with a reservoir cap to constantly seal brake fluid stored in the reservoir against the surrounding air. The inlet and outlet check valves are selectively opened in response to rise or drop of the level of fluid in the reservoir to ensure smooth fluid supply to the brake master cylinder.

Abstract: A hydraulic circuit unit comprises parallel top and bottom faces and a side face for receiving a valve assembly. At least four passageways extend between the top and bottom faces and are perpendicular to them. The ends of the passageways open through the faces and the passageways are arranged with one at the center of a circle and the others regularly spaced around the circumference of the circle so that the unit may be rotated about the center of the circle to align the passageways with those of an adjacent similar unit in a plurality of positions. Connections extend between at least two of the passageways and a valve assembly positioned on the side face.

Abstract: A closure is provided for an accumulator. The closure comprises a drain housing, a spring within the drain housing, and hollow cup-like piston within the drain housing, which is urged into an open position by the spring. With the piston in a closed position, the accumulator port is closed and blocks the bladder from entering the drain. The piston has substantially elliptical drain holes in its cylindrical side wall. With the piston in an open condition, the drain holes extend from within the accumulator housing to within the drain housing. The wall which defines the opening of each drain hole, at the portion adjacent to the closed joint of the piston, is canted so that a vector of the forces attributable to liquids leaving the accumulator is directed against the piston to aid in keeping it open. The spring is a coiled spring, so dimensioned as to be proximate the drain housing wall so as to be removed from the flow of the stored substance as it enters and leaves the accumulator.

Abstract: A composite article fabricated by a process comprising (1) bringing into intimate contact two copolyetherester elastomers having melting points differing by at least 20.degree. C., the copolyetherester elastomer (A) of higher melting point being in the form of a plurality of oriented strands, tapes or films and (2) heating the resulting assembly to a temperature between the melting point of the two elastomers to cause fusion of copolyetherester elastomer (B) of lower melting point while maintaining the orientation of copolyetherester elastomer (A).

Abstract: Straight and arcuate members define an aperture through which a weft yarn is carried by a jet stream of pressurized air. The leading end of the arcuate member closely approaches the straight member to form an exit slot through which the weft yarn is permitted to pass on exit of the same. A flat spring member is arranged to extend from the arcuate member toward the straight member to close the exit slot and is provided with a screen which fluidly seals the space between the flat spring member and the arcuate member.

Abstract: A mechanism of a travelling-wave loom comprises a rotary reed and a separating grate composed of pivoted and stationary portions forming a channel for the weft thread carriers to be partially accommodated therein. Each of the portions is formed by plates, the pivoted portion having a plurality of strips swivelled to the stationary portion. Attached to each strip are plates of the pivoted portion. Near the strips there are installed devices adapted to cooperate therewith and to accomplish coupling thereof with the stop motion of the loom. This makes it possible to minimize the probability of damage to the plates of the separating grate and to improve the reliability of operation of the loom.

Abstract: In an apparatus, synchronous rotation of a driven drum supporting mandrel pins and of two plates rotating in the same direction is effected. The plates support bending rods to bend rod stock on either side about successively arranged pins.The portion of the stock being bent and the preceding bent portion are securely urged against respective pins by means of a pair of spring-loaded shoes.

Abstract: A bottle filling machine is adapted for circulating cleaning liquid through its combination gas and liquid storage tank and conduits, filler valves and other fluid passageways communicating therewith at high velocity by partitioning the tank into input and output chambers with a float that is urged into sealing relation by buoyancy and by pressure differential developed on its opposed sides as a result of the pressure drop produced in components that communicate between the chambers.

Abstract: Production of a marbled product is accomplished by associating a plurality of product constituent streamlets in a desired cross-sectional pattern or configuration, diverting a portion of one or more of the product constituent streamlets of the pattern into one or more of the other product constituent streamlets of the pattern, joining the associated streamlets into a unified marbled product stream, and then dispensing the marbled product stream into a product container.

Abstract: A method and apparatus for transferring liquid from a first vessel to a second vessel. The second vessel communicates with the first vessel at a location beneath the surface of the liquid contained therein and means are provided for passing vapor present above the surface of said liquid to a heating zone where the vapor is heated to a temperature above the boiling point of the liquid. The heated vapor is then contacted with the surface of said liquid by means provided therefor. As a result of said contact, the surface liquid is caused to boil, thereby increasing the pressure above said surface, this increased pressure causing movement of liquid from the first vessel to the second vessel.

Abstract: For added strength and efficiency, the handles of impact or striking implements are weighted near their striking ends by the addition thereto of carefully pre-weighed veneers or by providing in a solid handle blank a head portion of increased thickness prior to compression. The mass of the handle at the striking end is effectively increased.

Abstract: A single piece of material is formed to have enclosing side walls, the bottom edges of which are cut to form at least four flaps which are direct extensions of the side walls. The lower edges of pairs of the flaps are joined to form joints which cross at a single point.

Abstract: A club container is removably mounted on a cart and has a bottom notch receiving a crossrod of the cart and an upper, releasable latch. The club container has a pleated, flexible plastic irons separator and has long tubular sockets receiving shafts of the woods. The cart has a frame of two U-shaped tubes secured together by rivets which also pivot a U-shaped wheel suspension tube carrying pivot pins on which are pvioted circle-carrying arms biased by torsion spring rods secured to the tube. To form a folding linkage, a pair of rods having bent-over lower end portions trapped in the wheel suspension tube are held together with bent-over, upper end portions trapped in a block secured to a handle. Two pairs of legs pivotally secured to a seat and having ends hooked into the frame of the cart mount the seat, along with a pair of braces hooked into the frame and slidable along one of the pairs of rods, for overcenter movement between a seating position and a folded position.

Abstract: A motion compensating tank which includes a bottom tank portion which is able of holding liquid and a top portion which has a flotation collar and a flexible collar. The flotation collar is buoyant in the liquid so as to float substantially level thereon, and the flexible collar sealably joins the flotation collar to the bottom tank portion. With this arrangement liquid which sloshes in the tank can be retained without any substantial spilling over the top of the tank.

Abstract: A camera case comprising an openable casing having an interior adapted for receiving and supporting a camera and a pouch secured to the casing and having a first retracted position within the interior of the casing and a second projecting position in which the pouch is folded inside-out and extends from the casing to form an extension thereof. The interior of the casing is in communication with the interior of the pouch such that a camera can be accommodated within the casing and an extension on the lens of the camera can be accommodated within the extended pouch.

Abstract: An apparatus and method of mounting a lens block on an optical lens blank having predetermined optical and mechanical centers so that the lens block is centered on the blank with respect to the optical center and is provided with recesses aligned on a line through the mechanical center of the lens blank. The apparatus includes a lens blank holder, an optical center alignment device and a lens block forming apparatus having recess-forming projections. The lens blank is placed on the holder and the optical center aligned on the alignment device. The holder is then placed on the lens block forming apparatus such that the recess will be formed along a line through the mechanical center of the blank. Liquid lens block material is then introduced into the forming apparatus and allowed to harden.

Abstract: A continuous casting mold for casting strands, such as billets and blooms having a cross-sectional shape possessing corners, preferably a four-cornered cross-section, comprising an upper mold part and a lower mold part. Walls movable independently of one another of the lower mold part are movable about pivot shafts or equivalent structure arranged transversely with respect to the direction of travel of the cast strand and operatively connected with the upper mold part. The independently movable walls of the lower mold part can be shifted under the action of resilient elements, such as springs, towards the hollow cavity or mold compartment. The pivot shaft connected with each wall is arranged to be movable in a transverse direction with respect to the side of the wall associated with the hollow cavity or compartment of the mold.

Abstract: A heat accumulating member for a rotary heat-accumulation type heat exchanger of a gas turbine engine, in which a flat sheet and a corrugated sheet are wound around a hub rotatably mounted in the heat exchanger. The flat sheet has a thickness of about 2.5 times that of the corrugated sheet whereby deformation of the heat accumulating member due to gas pressure and high temperature of gases is prevented.

Abstract: The efficiency of an air conditioner or furnace is markedly increased by limiting the time of operation of the compressor or burner to a maximum time of from 10 to 15 minutes by means of a primary timer responsive to a conventional thermostat. A blower timer then causes the blower to continue operation for 10 to 15 minutes after the compressor or burner is shut off.

Abstract: A heat transfer system for use in supplementing the operation of the heating/cooling system of a building and its hot water heating system includes a heat exchanger in the flue of the furnace as well as a heat exchanger in the fan chamber. A first liquid circulation loop couples the heat exchangers for transferring heat from the flue exchanger to the air moved through the fan chamber heat exchanger. A second liquid circulation loop includes the flue exchanger and the building hot water heater for supplementing the heating of water therein. In the summer months during the cooling mode of the systems operation, cold water employed, for example, for lawn sprinkling is passed through the fan chamber heat exchanger for cooling and dehumidifying air circulated in the building. A valve control system is employed to automatically control the flow path of fluid in the system as a function of detected temperatures.

Abstract: An air conditioning system controlled for automatically heating and/or cooling a multiple zone building is disclosed wherein each zone includes a zone temperature responsive load transmitter. Each load transmitter produces an output command signal for controlling operation of damper units and heating and cooling equipment. The command signal configuration is modified to avoid operation of heating and cooling equipment throughout a relatively wide "no load" band of zone temperatures centered around the zone set point temperature. The command signal is highly responsive to sensed zone temperature changes beyond the no load band so that the zone temperature tends to be maintained in the no load band.An alternative system is disclosed in which no load bands occur at two distinct command signal values and operation of damper units is effected when the command signal value shifts between the no load band values.

Abstract: An isothermal heating device comprises an annular tubular body providing a heating chamber for objects. Between the inner wall and the outer wall of this tubular body there is provided a plurality of separate ducts which are situated in a ring-shape about the heating chamber and which extend parallel to the tubular body axis. These ducts contain an evaporable heat transport medium and are in communication with each other preferably at one end of the tubular body. Such interconnection is in turn connected with a gas buffer reservoir containing an inert control gas.