Abstract: A therapeutic device comprising, a sleeve for covering a portion of a patient's body and having a space to receive liquid, a device for circulating a liquid through the space of the sleeve, and a device for cooling the circulated liquid.

Abstract: System for generating electrical pulses for relieving the pain of the patient comprising a pulse generator and a controller for modulating the parameters of the output pulses of the pulse generator to fluctuate in accordance with the 1/f rule; i.e. the spectral density of the fluctuation varies inversely with the frequency.

Abstract: In surgical procedures of the mastectomy and partial mastectomy type, a serious aftermath problem exists because of the present cultural attitude of such surgery. Authorities recognize the emotional trauma that a woman goes through after having been subjected to a radical, or less than radical, mastectomy. The removal of a woman's breast can have traumatic consequences and during the post operative stage, a need for femininity and a need for some means of reducing trauma is necessary. With the herein disclosed invention, a cover pad or the like, of aesthetic and feminine design, is disclosed which aids the woman in the post operative stage in a most positive and productive manner, especially with regard to her dealings with herself and those of a personal nature with others close to the wearer of the inventive device.

Abstract: A lead or heart wire for use in temporary electrical stimulation or monitoring of epicardial tissue. Positive fixation is accomplished by suturing the electrode to the tissue using an attached length of surgical thread and a curved needle. The heart wire is a tightly wound helix of wire insulated by a sheath. A needle, used for electrical connection to external equipment, is attached to the proximal end. Near the distal end, the conductor is bent into an "C" shape. The electrode is attached about midway along the top of the "C" shaped length of conductor. The length of surgical thread is attached to the proximal end of the conductor and exits the sheath through an aperture proximal to the "C" shape. The curved needle is attached to the distal end of the surgical thread. The heart wire may be readily removed after use by removing the surgical thread. The heart wire may be readily removed after use by removing the surgical thread, which is retracted into the conductor by pulling at its proximal end.

Abstract: An ultrasonic method and apparatus are provided for detecting and imaging clusters of small scattering centers in the breast wherein periodic pulses are applied to an ultrasound emitting transducer and projected into the body, thereafter being received by at least one receiving transducer positioned to receive scattering from the scattering center clusters. The signals are processed to provide an image showing cluster extent and location.

Abstract: There is disclosed a blood pressure measuring instrument which utilizes a standard cuff, a bulb for manually pumping up the cuff pressure, and a bleed hole which allows the cuff pressure to decrease at the rate of a few mm Hg per second. A single pressure transducer is in communication with the cuff interior and its output is sampled at a rate much higher than that of the blood pressure pulses.

Abstract: An improved system and method for sensing and measuring heart beat. A body-mountable instrument is provided having a first sensor for detecting pulsing of a user's blood resulting from the user's heart beat and body movement and generating a first electrical signal indicative thereof and a second sensor for detecting the user's body movement and generating a second electrical signal indicative thereof. The instrument further includes a processor responsive to the first and second electrical signals for determining the period of the second electrical signal and for subtracting a first portion of the first electrical signal occurring during a first time interval from a corresponding portion of the first electrical signal occurring during a second time interval.

Abstract: A pair of toroidally wound cores are maintained in a generally parallel, vertical, spaced apart relationship by a tubular insulating member passing through the toroid centers. The tubular member insulates the windings from a coupling loop which passes through the tube and which closes outside the toroidal windings. One winding is the primary of the isolation circuit, connecting the source of signals through a FET device to ground, and the other winding is secondary winding, which is also connected to ground through a FET, and which is coupled to a utilization device through a low pass filter. The FET devices are synchronously pulsed at a frequency above the signal frequency and the filter pass band.

Abstract: The present invention relates to a device for taking samples of endometrium, or curette, said device comprising a scraper device fixed to the end of a rod which slides in a tube; the scraper device is constituted by two blades subtended by a bow-shaped member, a sphere at the end forming a stop for the return of the device in the tube while two tongues form stop for the slide of the rod when the scraper device emerges.

Abstract: Apparatus for use in estimating the volume of a human breast includes a cup which substantially covers the breast and is lined with a flexible membrane, the membrane defining a space within the cup and the space being coupled to a fluid container having means to vary the volume of fluid within the container, and for indicating changes in the volume of fluid within the container, whereby variations in volume of fluid in the said space result in corresponding variations in volume of fluid within the container.

Abstract: A cold forged cylinder reel tooth adapted to be mounted to the cylinder of a threshing mechanism includes a threshing portion, a tapered seating portion and a fastening portion. The threshing portion includes identical symmetrical double-edged surface blades which are reversable to provide that the opposite unworn edged blade is positioned to engage the grain when the first edge blade is worn beyond practical use. The tapered seating portion permits proper indexing of the reel tooth 180 degrees to permit the unworn opposite double edge surface to engage the incoming grain in the threshing mechanism and the fastening portion provides rapid mounting and demounting of the cylinder reel tooth from the cylinder during the indexing operation.

Abstract: A combine harvester comprises an axial-flow threshing and separating unit which includes a threshing and separating cylinder disposed with its axis lying in a longitudinal vertical plane. The combine harvester is provided with means for feeding the harvested crop tangentially to the said axial-flow threshing and separating unit.

Abstract: A filter for a cigarette includes a porous filter rod circumscribed by a smoke impervious wrapper wherein the filter rod with the smoke impervious wrapper therearound is provided with grooves embedded therein and extending from one end thereof a preselected distance longitudinally therealong. Tipping material circumscribes the smoke impervious wrapper and is provided with flow-through openings therein in flow communication with the grooves. Support means are provided for the tipping material at the mouth end of the filter to maintain the tipping material in circumferential equalization.

Abstract: There is disclosed a dental prophylaxis device which may be electrically or battery powered and which comprises in combination a pair of spaced tynes disposed on a housing provided with an axial cavity, stationary support means on the housing in the vicinity of the base of the tynes and oscillating support means located on the housing between the bases of the tynes. The oscillating support means is supported on a cylindrical sleeve disposed in the housing cavity and cooperates with an oscillating drive shaft powered by driving means located in a second housing to which the first mentioned housing is removably connectable. A dental tape or floss having a non-elastic loop at one end which is supported on the oscillating support means and an elastic loop at the opposite end which is supported on the stationary support means spans the space between the ends of tynes and reciprocates between the tynes when the oscillating support means is in motion.

Abstract: The spray booth assembly of this invention is used for washing or chemically treating various kinds of objects in various industrial fields. The assembly is substantially characterized by providing a vacuum zone at or below a hanger path which allows the hangers suspended by the conveyor means to travel in a longitudinal direction in the open-type spray booth while carrying the objects to be sprayed. Whereby, the spray booth assembly can prevent the water or chemical moisture from flowing out through the hanger path toward the hanger conveying means.

Abstract: Means for adding corrosion inhibitor to an engine cooling system utilizing a corrosion detector in contact with the circulating coolant and which is in an electronic circuit to activate a control valve which controls the feeding of corrosion inhibitor solution from a reservoir that is in selective communication with the coolant system. The corrosion detector may be in the form of a probe that measures solution potential or electrical resistance of a metal wire as it corrodes due to the corrosiveness of the coolant. The corrosion inhibitor reservoir is located either in communication with the line between the radiator and coolant reservoir or in a by-pass line parallel with the radiator.

Abstract: The invention relates to guillotine dampers, particularly to those which are used to isolate a section of ductwork without the entire system requiring to be made inoperative. Known dampers of this kind suffer from the disadvantage that a satisfactory seal is difficult to establish around the periphery of the damper blade with the result that it can be hazardous in the isolated section if the remainder of the ductwork system is carrying toxic or otherwise dangerous fluids. According to the present invention, an auxiliary seal is provided in the form of first and second sealing surfaces extending around the periphery of the plane of movement of the blade, which are urged towards each other and into sealing engagement with the blade when in its closed position by means of a frame. The frame is continuously urged to the sealing position by means of devices. Cams act on the frame and are rotatable to selectively overcome the bias of the devices and withdraw the frame to release the damper blade for opening.

Abstract: A valve structure is provided which can be opened and closed under operating conditions without any adjustment in conditions existing in the system in which the valve is an element. The valve element can be turned with respect to the seat to provide for proper relation between the valve element and the valve seat to grind one with respect to the other during the operating cycle. The valve also includes a clutch having a radial acting trip overload that prevents the valve seat from being damaged during grinding which is effected by turning the valve through the clutch while moving the valve toward the seat during the closing cycle and produces a controlled grinding operation independent of pressure within the valve.When the valve is operated in the opposite direction, the clutch disengages and the actuator mechanism encounters only the thrust forces during the opening cycle. This allows the valve to be easily opened without overloading the system.

Abstract: A pump control valve and relief valve assembly are provided in the form of a valve housing having a main bore therethrough, a spool movable in said bore and having a pair of spaced annular grooves therein, a spaced relief bore in said housing, a pump chamber and a work chamber in said housing intersecting both bores, a pair of tank chambers, one on each opposite side of the pump and work chambers intersecting said main bore, said tank chamber adjacent the work chamber intersecting the relief bore, a tank bore connecting said tank chambers, an inlet return bore intersecting said tank chamber adjacent the work chamber, an inlet port connected to said relief bore and jump chamber and adapted to connect to a pump outlet port, a tank port connected to said tank bore, a pump inlet port and a return port connected to said inlet return bore, said pump inlet port adapted to connect to a pump inlet port and the return port adapted to be connected to a source of return fluid, and a combination check and relief valve ass

Abstract: A gate valve for controlling the flow of high temperature fluids includes a housing having an opening defining an inlet and an outlet for the fluid. An annular collar surrounding the opening includes a transverse passageway therein. The blade for controlling the fluid flow through the opening is made of fused silica. An actuator mechanism coupled to the blade moves the blade in the collar passageway to control the fluid flow through the opening. The fused silica blade exhibits superior mechanical characteristics, can be readily made in large sizes, and minimizes valve leakage.

Abstract: A horizontal water inlet tube is inwardly connected reversely through a valve within a horizontal valve housing and from the valve housing downwardly into a generally vertical water outlet tube. The valve is controlled by a valve control arm projecting generally horizontally from the valve housing downwardly connected through a float connector to a float vertically slideable on a float guide extending downwardly from the valve housing. A diverter at the upper end of the water outlet tube receives water flow generally horizontally from the valve housing into a pair of spaced, downward helical grooves directing the flow spirally into a pair of spaced vertical grooves for ultimate discharge downwardly through the water outlet tube. The diverter vertical grooves are larger in cross-section than the respective helical grooves and are formed by radial plates converging centrally to a cylinder at groove upper portions and an inverted cone at groove lower portions, each vertical groove occupying in the order of 120.

Abstract: An improved electrohydraulic servovalve has first and second valve spools mounted for independent sliding movement relative to a body in response to a common command signal. The valve has a first drive mechanism operatively arranged to cause a desired motion of one valve spool in response to the command signal, and has a second drive mechanism operatively arranged to cause a desired simultaneous similar motion of the other valve spool in response to the command signal. The improvement comprises a differential position sensing mechanism arranged to sense the relative positions of the two valve spools and operative to produce an output related to the difference therebetween, and an indicating device supplied with such output and operative to indicate substantially dissimilar relative positions of the spools.

Abstract: A spherical valve member is moved within a housing between operative positions by direct application of supply pressure and operation of a solenoid arranged to maximize mechanical force imposed on the valve member while minimizing solenoid size and eliminating the use of movable close fitting cylindrical parts which can be subject to sticking in the presence of solid contaminants.

Abstract: A universal operator is disclosed for rotating blade air, smoke and fire dampers, said dampers comprising a frame and a plurality of interconnected blades within said frame, said interconnection being in the form of a link bar which adapts all of said blades to open and close as a unit. The operator comprises a pair of pivotally connected members to form a knee-action joint which in turn is pivotally connected both to the damper frame and to said link bar. The operator also comprises stall type actuation means for selectively acting through the operator to control the degree of blade opening and bias means to return said blades to their normal operating position whenever said actuation means is disengaged.

Abstract: An accumulator device is characterized in the provision of plural mechanisms for maintaining the oil port sealing valve member in open position, one said mechanism comprising a spring and the other comprising a control device member which may be activated to its valve stem releasing condition responsive to pressure drops of a predetermined magnitude or after a predetermined time interval.

Abstract: Methods and apparatus are provided for attenuating through-fault pressure disturbances in fault relays for a liquid-filled transformer. The method comprises the interposition of a mechanical filter between the transformer and the relay for attenuating through fault pressure variations while passing internal pressure faults. The filter consists of a pressure attenuation passage having an optimum length to diameter ratio for attenuating higher frequency pressure oscillations in excess of 50 Hz.

Abstract: A recoverable tubular article comprising an elastomeric sleeve held in an expanded or extended condition and capable of recovering to its unexpanded condition of smaller diameter upon the removal of an outer restraint, an outer restraint, essentially tubular in configuration, bonded to said elastomeric sleeve, said restraint and said bond between the sleeve and the restraint being sufficiently strong to retain the elastomeric sleeve in its expanded condition under ordinary conditions of storage and said restraint being capable of being segmented and peeled from said elastomeric sleeve to permit said sleeve to recover to its original state.

Abstract: A transfer device comprises a transfer lever arranged to execute an oscillatory movement and carries a thread clamp at its free end. This thread clamp comprises a leaf spring constituting a movable, controllable clamping element. The leaf spring can be raised by an actuating lever pivotally mounted on the transfer lever and which is movable relative thereto. At least one thread pick-up or entrainment element and preferably two thread pick-ups or entrainment elements, are arranged on the batten of the loom to position the weft or filling thread in the thread clamp in a predetermined position. This arrangement constitutes a relatively very simple, operationally reliable and self-cleaning transfer device.

Abstract: The invention comprises a fully adjustable and pivotal support for a warp stop-motion which may be finely adjusted to its optimum operable position and then pivoted upwardly and out of the way when desired, as while changing the warp beam, and instantly and accurately retured to said optimum operating position by means of a positive stop which positions the warp stop-motion mechanism in said optimum operative position automatically without further attention by the operator except to tighten the few bolts necessary to hold the warp stop-motion mechanism in said optimum operating position.

Abstract: The catch mechanism employs a straight line guideway for moving an ejector reciprocally in a straight line path. The ejector has a foot piece for engaging only the foremost gripper projectile of a series of projectiles in a channel so as to positively eject the foremost projectile. A pivotally mounted spring biased pawl is used to retain the projectiles in the channel and is biased outwardly during an ejection process by the movement of the ejector.

Abstract: Actuating device for the reciprocating movement of the belts carrying the weft thread insertion grippers in shuttleless looms. Each belt is provided with a lengthwise series of slots and with the slots of one series a respective gear wheel is in mesh engagement. An oscillating gear sector drives the gear wheel. The gear sector has along the bisecting line thereof a slotted link coupling including a slider. The coupling provides articulation both with the big end of a connecting rod in a crank mechanism, which is driven by a cyclic shaft of the shuttleless loom, and with the pin of a rocker arm following the oscillations of the gear sector.The law of motion determined by the cooperation of the slotted link coupling and the slider causes variation of the transmitted speed, acceleration and stroke, particularly near the two dead points of oscillation of the sector thereby improving the operations of the grippers to which such motion is transmitted.

Abstract: A thread brake for a textile machine, in particular a shuttleless loom, in which weft thread lengths are withdrawn from a store disposed outside the shed, wherein interruption of weft thread take-off is carried out by displacement of a take-off roller 6 rotating at constant peripheral speed from an operative position to an end position remote from the thread 1. The device comprises at least for one brake shoe a movable holder 21 which is movable between two end positions in the direction of the gap towards a holder 21' of the other brake shoe and at least indirectly connected to the loom shaft 8 in driving relationship. The displacement of one or each holder occurs against the force of a spring 23 or 23' which in the unloaded state corresponds to a distance between the two brake shoes corresponding to thread thickness.

Abstract: A tool for attaching a wire dropper or batten to the wires of a fence line comprises a body having first and second wire engagement devices which are located at substantially right angles to one another. The body includes a lever mounting device which can receive a lever for operating the tool. The tool is used by engaging a fence wire in the first wire engagement device and the wire dropper or batten in the second wire engagement device. The body is then rotated about an axis which is coaxial or parallel with the longitudinal axis of the fence wire so as to wind the wire dropper or batten onto the fence wire.

Abstract: The present invention relates to a method and apparatus for stretching wire. The apparatus comprises a pair of elongated handles attached to a connecting element. A cylindrical member having an open-sided slot therein is secured to the connecting element. In operation, the wire to be stretched is placed in the slot in the cylindrical member and the cylindrical member is placed with its outer peripheral surface against a side of the fence post remote from a preceding fence post. The operator of the tool then rotates the handles in a manner rotating the cylindrical member about its longitudinal axis to stretch and wrap the wire about the cylindrical member. At the same time, the cylindrical member "rides" upwardly or downwardly along the fence post against which it is placed. In this way, a single operator can both stretch the wire and attach the wire to the fence post.

Abstract: A seawater activated battery plate, and a method of making the same, utilizing an electrically conducting grid and an active reducible material primarily constituting lead chloride adhering to the grid such that the grid is exposed at a surface of the active material, the material adjacent the grid primarily constituting porous lead and a metal chloride. The battery plate is characterized by its inexpensive method of manufacture, its quick activation even in cold seawater, its absence of significant voltage peaking at initial discharge and uniform voltage generation during discharge.

Abstract: A process for holding a bag and a bag holding device. The device includes a box-like structure having a pair of side walls joined to a pair of end walls along corner score lines. The structure has a corner structure defining a notch in at least two of the corner score lines. Elastic band encircles the outside of the box-like structure while residing in the notch. The process comprises the steps of notching the corner score lines of a collapsible box-like structure having a pair of side walls joined to a pair of end walls along the corner score lines; inserting the bag into the mouth of the structure; overlapping the periphery of the mouth of the bag over the edge of the mouth of the structure; encircling the overlapping portion of the bag with the elastic band; and lodging the elastic band over the overlapping portion of the bag and within the notches at the corner score lines so as to hold the bag in an open position and prevent displacement of the bag from the structure.

Abstract: Either a pyrotechnic-powered needleless injector or (with spacer adapters) a conventional syringe is held in firmly abutting alignment with a dispensing orifice of a special storage vial. A flexible perforated seal forms a plug in the dispensing orifice, opens under liquid pressure to dispense medicament from vial to injector, and seals around the dispensing path between vial and injector against loss of the medicament. The liquid medicament is forced through the orifice under the action of a plunger forming one wall of the vial. The plunger in turn is driven by a micrometer-type screw whcih is calibrated in terms of dispensed volume.

Abstract: For servicing grease filled valves, wherein the valve has a cavity with packing grease therein, an apparatus is disclosed which in its preferred and illustrated embodiment includes a first detachable fitting enabling injection of packing grease into the cavity. A second and companion detachable fitting is also disclosed which utilizes an elongate stinger rod driven by a rotatable stem to upset a check valve drain plug wherein the second fitting has an outlet passage extending axially therethrough and connected through a lateral port.

Abstract: A rotating riffler for the purpose of withdrawing smaller laboratory-sized representative particulate samples from larger samples. This comprises a rotating disk having an interchangeable top plate of plastic foam having openings therein to accommodate sample containers. Where different size sample containers are employed, the plastic foam plate is changed to accommodate them. The rotating disk is mounted on a base containing a variable speed drive and is supported at the periphery by bearings rather than by the shaft. A slurry or dry volume of particles of which a smaller representative sample is required, is fed into a funnel-like device, then drops in a controlled flow into the sampling containers rotating below the funnel. "V"-shaped bridging devices having curved legs are attached between each pair of containers to prevent spilling.

Abstract: An oil cap having a self contained funnel is the subject of the present invention. The oil cap is inserted into the engine oil port in place of a conventional cap. An opening in the cap receives a neck portion which extends upwardly and in turn receives a funnel portion. The funnel portion is provided with a cover which may be removed to add engine oil.

Abstract: A funnel unit for use with automotive type vehicles. A motor vehicle requires periodic checking and maintenance of crankcase oil levels and transmission fluid levels. The crankcase oil inlet is normally near to top of the engine and is conveniently accessible. The transmission fluid inlet, however, is normally near the lower part of the engine block and this not readily accessible. The funnel unit herein has two detachable main parts which are a cone member and an elongated tube member. When these two parts are attached the elongated tube facilitates access to the transmission inlet. The elongated tube may in some cases impede use of the assembled funnel unit for adding oil to the crankcase inlet, however, and in such case the two parts are separated from each other and cone member alone is used for adding oil to the crankcase.

Abstract: A machine for clearing and cleanly chipping trees and brushwood in the path of the machine as it moves forward. A pair of counterrotating disk cutters cut a kerf in the standing material and propel the cut material upwardly and rearwardly to the throat between a pair of feed rollers. The feed rollers deliver the cut material to a chipper, which reduces the material to chips and delivers them to a chip storage bin. The bin can be tilted to dump chips alongside the machine. The entire mechanism is carried by a self-propelled, articulated, track-supported vehicle which is especially well-suited for operation over soft, boggy ground.

Abstract: Logs are advanced substantially in the direction of their longitudinal axes through a saw while engaged between a driven pusher dog and a retarded holdback dog. The pusher dog is on an endless carrier chain located above an initial log support, and the holdback dog is on an endless carrier chain located below the log path and forwardly of the support. Logs on the support are movable angularly and laterally from the machine axis to displaced positions which are unobstructed by the carrier chains, to permit offset sawing and taper sawing. Chipper heads produce planar surfaces on logs approaching the saw. A retractible preliminary holdback dog engages the forward end of a log and moves past a bottom-flattening chipper head to a tranfer area where the chain-carried holdback dog engages the log and the preliminary holdback dog is retracted.

Abstract: Disclosed herein is a unique tool chest which combines the convenience of pegboard display with the mobility and security of a locking tool chest. A slideably disposed pegboard is contained within the tool chest and mounted on rails. A winch with a cable is located on the exterior of the tool chest and works in conjunction with the pegboard so that when the top lid of the tool chest is opened and the winch is cranked, the pegboard will extend upwardly out of the top of the tool chest and lock in the desired position. Thus easy access is provided to the tools hung upon pegs on either side of the pegboard. Doors located on the front and the rear of the tool chest allow access from either side. The entire tool chest sits upon a foundation piece provided with casters for easy mobility.

Abstract: An automatic tire chain for driver operated vehicles includes a chain device that is moved to the road contact surface of a tire from a position adjacent thereto by means of a spring mechanism placed under tension when the chain is held away from the road contact surface of the tire. A pair of rings, one being fixed to the wheel and the other being slideably mounted thereon are provided with indexing slots. The slideable ring has a chain affixed thereon and is moved relative to the fixed ring by an operator activated engaging mechanism mounted on the vehicle. The engaging means engages the indexing slots and moves the slideable ring relative to the fixed ring while the vehicle moves along the road at a speed less than 10 miles per hour placing the chain adjacent to the road contact surface of the tire.

Abstract: A pneumatic tire having spaced beads and a pair of biased inner plies tied to each bead, upon which is placed a third ply disposed at a greater angle to the equatorial plane than the underlying bias plies, resulting in the outermost ply cords being "loose" in comparison to the innermost ply cords being "tight" after the tire shaping operation. The cords of the outermost ply assume a shorter effective length along with an increase in their twist (tpi) in the inflated shaped vulcanized tire than the length and twist as laid down on the building drum. A further proviso is that the cords of the third ply shall be at some degree of compression greater than as laid down on the building machine, with said compression being the maximum attainable by the cords as a consequence of the bias cords pantographing during the shaping of the tire.

Abstract: An improved panel wall system is disclosed with means for interconnecting the panels in any desired angular relationship while providing a sight barrier through the joint. As many of the panels may be connected as are desired; and they may be placed in any desired configuration. Each panel includes an insert assembly to provide its exterior face; and these may be removed and changed, if desired. A full line of shelving and cabinets may be assembled to the panels with a limited number of interchangeable components. The cabinets include a flipper door which will not rack when opened or closed, and which slides beneath the top of the cabinet in the open position, yet has its edges flush with the top and bottom of the cabinet in the closed position.

Abstract: Hitherto, efficient combined solar heating and passive cooling has not been available in a convenient, modular, relatively simple to install, reasonably priced apparatus. A reservoir (12) has a cover (32) having upper (42) and lower (44) reflective surfaces. Liquid (26) fills the reservoir (12) to a desired level (28). The cover (46) is positionable in either closing relation over the open top (24) of the reservoir (12) with the upper surface (42) reflecting sunlight away from the reservoir (12) or in open relation with the lower surface (44) aligned generally to reflect sunlight towards liquid (26). A normally floating raft (68) substantially covers the top surface (30) of the liquid (26) to retard cool weather daytime evaporation and other heat losses from the liquid (26). The raft (68) may be removed at night during warm weather to provide efficient evaporative and radiative cooling.

Abstract: A sealing structure for use in a rotary, heat-regenerative heat exchanger includes a seal element with a face in rubbing contact with a regenerator, a first elastic element such as a ring spring coupled to the seal element, and a second elastic element such as a ring spring coupled to a housing. The first and second elastic elements are in contact.

Abstract: A first water header is connected to a second water header by laterally-spaced multiple parallel composite tubes, each consisting of two or more component tubes of vertically-elongated rectangular cross-section welded to one another along their horizontal narrower adjoining faces, the height of each component tube being a multiplicity of times the width thereof. The thus welded faces form intermediate partitions or webs of doubled thickness running the entire length of the composite tube. This greatly strengthens the composite tube thus obtained and also divides the cooling water flow into vertically-spaced thin streams or bands of cooling liquid. Rising from the first and second headers are first and second fittings which serve not only to transmit the cooling water into and out of their respective headers but also serve to connect and attach the header to the keel or other underwater location of the heat exchanger to the hull of the boat or vessel.