Abstract: A plastic heat exchanger comprises a single heat exchanger construction made up of a plate having two spaced apart walls and with a plurality of substantially parallel cross webs interconnecting the two walls which define a multiplicity of longitudinal heat transfer medium flow channels. The plate is assembled with a distribution and collection element which has spaced apart walls which are adapted to be arranged in abutting relationship with the walls of the plate and welded together with them to form a unit. The distribution and collecting element includes at least one heat transfer fluid plastic nipple inlet connection and at least one heat transfer fluid plastic nipple outlet connection. Advantageously, each unit may be interconnected by means of a plate which connects one nipple element of one distribution connecting element with a different nipple element of the next adjacent distribution and collection element.

Abstract: A heating device is disclosed wherein a printed circuit board is uniformly preheated before discrete electronic components are soldered onto the boards. The soldering process includes a reflow stage where the boards are subject to rapid temperature change causing internal heat stresses which warp the boards if they haven't been preheated. The device comprises a non-conductive body and conductive elements, such as steel staples, embedded in said body. The staples extend through both sides of said body making contact with a heating surface and supporting the printed circuit board which sits upon them. The staples are spaced and arranged so the components' electrical pins which extend beyond the bottom surface of the board pass into the bed of staples without interference. Therefore, heat is transferred from the heating surface directly to the board via the conducting staples in a uniform fashion.

Abstract: A method and apparatus are provided for heating and cooling buildings, particularly chickenhouses, wherein low grade heat is obtained from below the frost line and, by heat exchange means, the low grade heat is used to heat or cool air which is then ducted into the building. This conditioned air circulates within the building and exits through horizontal vents extending substantially continuously around the periphery of the building near the floor thereof, which vents connect the inside of the building to vertical open wall channels within the walls of the building. The wall channels are connected at the top of the walls to similar channels in the roof of the building and into which the air passes. Exhaust means connected to the roof channels allow the air to exit to the atmosphere.

Abstract: A heat exchanger having corrugated fins interposed between adjacent folds of a liquid tube, which corrugated fins severally contain in each of the holds thereof a louver having louver blades alternately projected from the base line of fin and having at least part of said louver blades so arranged that the states of inclination thereof relative to said base line of fin vary alternately.

Abstract: In a motorcycle engine having front and rear engine blocks arranged along the longitudinal line of a vehicle body, the front engine block is equipped with cooling fins for air-cooling and the rear engine block is provided with a water jacket for water-cooling. The engine may be a V-type engine or a horizontal opposed-type engine. The present invention is applicable to a motor scooter having left and right steps for placement of the feet of the driver to place his feet, the steps being installed in the lower portion of the vehicle body between the front and rear wheels of the vehicle.

Abstract: The invention relates to a device for cleaning the pipes of heat-exchangers by means of cleaning bodies, generally sponge balls. The removal and reintroduction of the cleaning bodies occurs with the aid of a device installed in the outlet pipe, which consists of a casing (1) with one or two screens (2) arranged within it. The screens (2) end on the downstream side at a pipe (3) with an opening (4). Inside this pipe (3) there is another pipe (5) with an opening (6) which preferably rotates continuously. The cleaning bodies (9) are collected in the inner pipe (5). A pressure water pipe (7) and a cleaning body outlet pipe (8) are connected to the outer pipe (3). When the inner pipe (5) is in the appropriate position, the cleaning bodies (9) are washed out of the inner pipe (5) by pressure water and introduced into the inlet pipe of the heat-exchanger via the cleaning body outlet pipe (8). A lock (11) is built into the cleaning body return pipe in order to introduce and remove the cleaning bodies (9).

Abstract: An improvement in apparatus for cleaning heat exchanger tubes wherein each tube has chambers at its opposite ends for capturing a tube cleaning element, such as a brush, which is adapted to move in opposite directions through the tube upon reversing the direction of flow of heat exchange fluid therethrough. The improvement comprises apparatus for detachably mounting the chambers to the ends of the respective tubes including a holder plate having openings formed therethrough at locations corresponding to locations of the ends of the heat exchanger tubes.

Abstract: Assembly of tubes in low carbon ferritic stainless steel having 17 to 18.5% by weight of chromium on a tube-plate of carbon steel. It includes at least one overlay of low carbon steel on the surface of the tube-plate opposite the plurality of tubes, of such thickness that the ends of the tubes are located at an intermediate level of the overlay, and weld beads between the ends of the tubes and the overlay.

Abstract: A soot blower for the removal of deposits collected on the surfaces of walls forming a chamber, through which gases containing solid particles flow, is integrated in one of the walls which form that chamber. The feeding pipes of the blower for feeding a blowing agent into the chamber are formed in the region of the line which defines the outer face of that wall.

Abstract: A fireproof cabinet system for electronic equipment including a wall shield with an outer metal layer that acts as a radiation shield, an inner support layer and an insulation layer. A water supply nozzle is mounted on top of the fireproof cabinet system for providing a continuous stream of cooling water on the cabinet shield for minimizing fire damage of the shield and also providing a temperature barrier for the electronic equipment. A forced air cooling system provides cool air from a supply located outside of the equipment room to the cabinet where the coolant air is ducted along the top and side walls of the cabinet in a sheath formed between the cabinet wall and the interior so that the coolant air in combination with the cooling water act to cool both the equipment and to remove heat caused by the external fire.

Abstract: The splint for surgical operations on the knee comprises a member for holding the ankle and the foot, immobilizing the leg in a folded position in a substantially vertical plane, and a fastening means connecting the holding member to a stand enabling the splint to be rested on the operating table. The splint is articulated about a substantially horizontal pin permitting the holding member to rock in a vertical plane is fixed on the stand by means of a longitudinal slide groove made on the stand along the axis of projection of the leg. The slide groove allows travel and positioning of the fastening means. The stand located in the sterile region fits in a support rendered integral with the operating table and the fastening means comprises a substantially vertical pivot allowing lateral deflection of the holding member.

Abstract: A vehicle heater cleaning and repair apparatus and method is provided in which the apparatus has a closed loop pipe system removably connectable to a vehicle heater input and output line which have been disconnected from the engine under the vehicle hood. The water inlet is connected to a water source for allowing the injection of water into the pipe system. A valve allows the water to be shut on or off. A pump is connected to the pipe system for pumping liquid therethrough and through the vehicle heater. Sealant solution and cleaning solution tanks are connected to the piping system for first injecting a cleaning solution for circulation through the vehicle heater core and later for circulating a sealing solution. An electrical heater is also connected to the pipe system for heating the liquids being circulated by the pump through the vehicle heater core.

Abstract: A method of preventing corrosion in boiler plant equipment when cooling flue gases originating from a combustion plant, such as flue gases containing sulphur oxide or organic acids, to a temperature beneath which sulfuric acid condenses (sulfuric acid dew point temperature) and a further temperature defined as an upper permitted wall-temperature of the stainless steel. The upper permitted wall temperature is with respect to the stainless steel material from which the walls are made and the prevailing partial pressure of water vapor present in the gases. This limiting temperature is specific to each stainless steel. The heat exchange is by means of a coolant, suitably water, located on the other, i.e.

Abstract: The shoulder brace of the present invention limits motion of the shoulder. The brace is comprised of a body belt, two arm belts and a resilient belt. The body belt is fastened about the torso. The first arm belt attaches about the upper arm while the second arm belt attaches about the fore arm. The resilient belt has a first end and a second end. The first end is attached to the body belt. Means are provided for connecting the second end of the resilient belt to the first arm belt and the second arm belt. Thus the resilient belt provides feedback when movement of the arm away from the torso is approaching the limit of movement permitted by the brace. If adjustment means to the resilient belt, such as a buckle, are provided it is possible to vary the range of permitted movement of the arm with respect to the torso.

Abstract: A heat sink for a well logging instrument aids in dissipating heat from electronic components. The heat sink is of rigid, heat conductive metal. The heat sink has an outer surface that is arcuate for mating with the inner surface of the instrument housing. The electrical components are mounted directly to the heat sink. Springs located on each end of the heat sink urge the heat sink outer surface into contact with the housing.

Abstract: A self-securing heat sink for transistors and the like comprises a unitary member that is constructed from a malleable material having a high heat transfer coefficient. The unitary member includes a base portion, at least one heat radiating fin portion, and a clip portion that is capable of engaging a transistor to retain the heat sink securely on the transistor without necessitating the use of threaded fasteners, rivets, or the like.

Abstract: A heat exchanger has a plurality of fluid flow tubes secured adjacent their ends by tube sheets. Cleaning elements are adapted to shuttle back and forth in the tubes and are adapted to be captured by baskets. A basket retaining plate is fixedly mounted, as by bolts or the like, outwardly of the tube sheet in an adjacent or proximate, generally parallel relationship to the outer face of the tube sheet. The retaining plate may be mounted either in spaced relationship from or in abutting relationship with the outer tube sheet face. The plate and its mount cooperate with the tube sheet to hold the baskets in fixed position relative to the tube sheet and tube ends. The outer capturing and holding portions of the baskets extend outwardly from the retaining plate. The baskets include central or intermediate portions which extend through openings in the plate and inner portions which terminate within the tube sheet openings.

Abstract: A tube and support system for a heat exchanger in which a first and second series of spaced tubes extend from opposite sides of a header. Each tube extends in a serpentine pattern, with the tubes of the first series being offset from the tubes of the second series. Each tube in one of the series is bent in a manner to extend in a same plane as the other series of tubes. A support member extends between the bent tube portions and the corresponding portions of the tubes of the other series.

Abstract: A heat exchange attachment device for integrated circuits is presented which eliminates any need for contact with adhesive pastes or solder. A snap-on holding piece permits a finned cooling unit to be threaded through an aluminum base plate attached to the pin grid array package so that a threaded shaft of the cooling unit may be screwed into adjustable contact with a beryllium oxide disk mounted on the integrated circuit package.

Abstract: In a perforated heat conductive surface structure having voids under an outer surface and openings in the outer surface, in order to obtain a high performance in particular at a low pressure and low temperature region, there is provided a heat transfer wall in which a thickness of a wall at a ceiling of each void and a length of a passage of the respective openings are increased in predetermined ranges.