Showing papers on "Bimetal published in 1990"

A novel plasma surface metallurgy: Xu-Tec process

Abstract: A new surface alloying technology, the Xu-Tec process, was developed in response to the need for higher quality alloy layers at the surface of less expensive metals or base alloy metals with different characteristics. The Xu-Tec process is a unique and hybrid technique which has evolved from both ion nitriding and sputtering techniques and uses a double-glow discharge phenomenon inside a vacuum chamber. One glow discharge heats the substrate and the second glow discharge produces metallic ions which diffuse into the substrate's surface to form a surface alloy layer. In general, any metallic or metalloid element can be diffused into the surface of plain carbon steel and other conductive substrates to form almost any alloy or alloy steel, such as nickel-base alloy, stainless steel and high speed steel. This process provides for the creation of new alloys, and also for the creation of a deposition layer on the surface of a similar diffused layer, thereby eliminating bonding and adhesion problems. Commercial saw blades diffused with tungsten-molybdenum by the Xu-Tec process have been produced with superior performance and with much less cost than bimetal and high speed steel saw blades. Nickel-base alloy on the surface of low carbon steel plates of surface area 1 x 0.5 has been produced by the Xu-Tec process. The Xu-Tec process offers a powerful means of producing diverse alloy layers in and on the surface of metallic substrates. The versatility and economy of this process permit this technology to be used in many industrial applications.

Thermocouples with bimetallic junction on closed end and compensating conductors

Abstract: This invention concerns thermocouples for the measurement of temperature of molten metal which have a bimetal junction located in a closed outer end of a length of quartz glass tube with the wire ends separated around a plug in the open end of the tube and connected to the compensating conductors of the thermocouple.

Bimetal radiator for building heating plants

Abstract: The radiator foresees a bimetal element with a steel core, forming the elementary component of the heating fluid duct, integrated with a die-cast aluminium coating. The said elementary duct component consists of two symmetric conduits (1) with intermediate parallel lengths and with terminal parts converging into counterposed main parts (2 and 3) with threaded mouths (4) and with a front part having annular dishings (5) which, in composition, form respectively the higher and lower collectors. The present device, by avoiding the direct contact of the water with the aluminium, does not permit the hydrogen formation while by means of its vertical transport canals with a symmetrical scheme and perfectly cilindrical allows a quick bleeder of the air and avoids the use of gas venting. It results a reversible seamless structure particularly compact and strong.

Circuit breaker with low current magnetic trip

Abstract: A circuit breaker having a trip mechanism comprising a primary armature which is attracted toward a bimetal by magnetic flux produced by a predetermined overcurrent flowing through the bimetal to unlatch an operating mechanism and open electrical contacts, includes a pivoted supplemental armature which is also attracted toward the bimetal by the overcurrent and which bears against and urges the primary armature toward the bimetal to thereby reduce the predetermined overcurrent at which the breaker opens the electrical contacts. The supplemental armature comprises a flat strip of magnetically permeable material which is bent at one end to form a hook which merely drops into a recess in the breaker housing. Integral flanges on the strip form a magnetic yoke which concentrates the magnetic flux to increase the sensitivity of the magnetic trip function.

Process for forming mixed heavy bimetal alkoxide-carboxylate compositions and novel compositions thereof

Abstract: Mixed heavy bimetallic alkoxide-carboxylate compositions are formed by reaction of a heavy metal tetraalkoxide (e.g., a zirconium alkoxide) and a heavy metal tricarboxylate (e.g., yttrium acetate) with elimination of distillable ester by-product therefrom. Hydrolysis of said compositions produced novel bimetallic hydroxy-carboxylates. Calcination of the hydrolysis products give bimetallic oxides.

Thermoswitch for fixing rotary body

Abstract: PURPOSE:To follow the increase in temperature of a heat source and to improve reliability as a safety device by exposing at least a part of the bimetal of a thermoswitch for a fixing rotary body. CONSTITUTION:A bimetal 1 is held at a switch part by a thermoswitch cover 2 and a holding stage 3. The cover 2 is cut and removed so that the contact area with the bimetal is reduced as much as possible within a range wherein the bimetal 1 can be supported. When a cover part 21 is cut and removed and the bimetal 1 is exposed in this way, heat from the surface of a fixing roller 17 is directly transferred to the bimetal 1. Therefore, response is improved.

Fluid coupling having damped bimetallic spring

Abstract: A fluid coupling includes a casing supported by a drive shaft, a cover fixed to the casing to form a chamber, a partition plate fixed to the cover to partition the chamber into a reservoir and an operation chamber, a rotor disposed in the operation chamber, a valve plate operated to open or close a passage provided in the partition plate, a stud supported by the cover and fixed to the valve plate and a bimetal spring fixed to the stud on an inner end and to the cover on an outer end thereof. A damper is disposed between the cover and the bimetal spring and includes a rubber block and a bracket fixed to a part of the cover. The damper prevents the vibration and breakage of the bimetal spring.

Printed wiring board

Abstract: PURPOSE:To restore an accurate shape by heating at the time of soldering even when a terminal is deformed, and enable sure soldering by constituting the terminal part of an electronic parts by using a bimetal terminal composed of at least two kinds of conductive metals having different thermal expansion coefficients. CONSTITUTION:When heat is applied to a bimetal terminal 8 constituted of Cu 6 and Ni 7, they expand according to the respective expansion coefficients, and the terminal 8 generates a shape change toward the Ni 7 side. As a result, the bimetal terminal 8 can be surely soldered to a contact terminal below it.

Enclosed bimetal circuit breaker

Abstract: An electrical circuit breaker comprises a base with two terminals embedded in, and extending through, the base. The external plug-in portions of the terminals are centered on the base. The internal portions of the terminals are off to one side in order to accommodate a PMB bimetal mounted on said internal portions. A cover secured to the base encloses the PMB bimetal.

Loaded cavity resonator, or pot circuit - has bimetal wall supporting inner conductor or load plunger

Abstract: The cavity resonator has a wall formed by a bimetal plate, supporting the inner conductor, on the load stamp. The metal with the greater heat expansion coefft. lies on the outside. If the wall is partly fomred by a bimetal plate, a drive with a greater heat expansion coefft. in positively coupled to the wall. The disc is concentrically fitted to the inner conductor, on to the loading stamp. Typically the position connection of the disc to the wall is in the form of a soldered joint. At room temp. the wall and disc lie flat, while at increased temp. the entire resonator expands, requiring a compensation for resonance frequency maintenance. ADVANTAGE - No unacceptable change of the resonance frequency at HF output change.

Embedded welding trapezoidal copper lath parallel cable cleat

Abstract: The utility model relates to a copper-aluminum parallel cable cleat for a scarf welding trapezoidal copper lath. As the picture 1 shows, the cross-section of a copper lath (2) in a copper-aluminum bimetal element is a reverse trapezoid shape. The short bottom surface is provided with a semicircular groove. The welding surface of the short bottom surface and an aluminum component (1) is provided with a plurality of grooves or rolled patterns which are vertical to the longitudinal cross-section. The copper lath 2 is embedded and welded in the aluminum component 1 as an entire bimetal element. Compared with the existing copper-aluminum parallel cable cleat, the structure of the utility model uses less copper material, and the cost of manufacture is low. The scarf weld of the copper-aluminum bimetal element is good, and the welding surface can only bear compressive stress. The copper and the aluminum are combined firmly. The operating is reliable.

Thermal type trip device for wiring breaker

Abstract: PURPOSE:To give no effect to the deflection of a bimetal by constituting a heater with a serial circuit of a pair of heater elements arranged apart in the direction connecting the fixed side of the bimetal and the free end and a flexible lead wire electrically connecting adjacent ends of the heater elements CONSTITUTION:When an excessive abnormal current flows in a main cable with contact pieces 6 and 5 inserted while the movable contact piece 6 is brought into contact with the fixed contact piece 5, one of an electromagnetic element 9 and a thermal element 8 is operated, a trip mechanism section 11 is operated, and a contact section is opened The thermal element 8 is formed by overlapping a heater 8a on a bimetal 8b, and the heater 8a is constituted of a pair of vertically separated heater elements 19a and 19b and a flexible lead wire 19c connecting terminals of elements 19a and 19b When a current with the preset value or above flows in the heater 8a, the upper end section of the bimetal 8b is bent to the left, and the bimetal 8b is easily bent to the lead wire 19c not overlapped by elements 19a and 19b

Flow passage control mechanism for heat exchanger

Abstract: PURPOSE:To improve heat transfer efficiency during operation and reduce remaining cooling material upon stopping the operation and draining the cooling material by a method wherein a drain hole is formed on the supporting structure of an inner casing while a temperature-operative valve for opening and closing said drain hole, is provided. CONSTITUTION:A temperature-operative valve consisting of a bimetal 14 is fixed to a flange 12 by a rivet 16 through a supporting base 15, a valve body 17 is fixed to the lower surface of the tip end of said bimetal 14 by the rivet 18 and a drain hole 19, opened and closed by said valve body 17 is formed on the flange 12. During the operation of a fast breeder reactor, cooling material becomes high temperature condition (400 deg.C, for example) and the valve body 17 at the tip end of the bimetal 14 blockades the drain hole 19. On the other hand, when the fast breeder reactor is stopped and the cooling material becomes low temperature condition (250 deg.C, for example), the bimetal 14 is bent upward and the drain hole 19 is opened whereby the primary cooling material, being stagnated in a gap 11, flows down from the upper part of the flange 12 through the drain hole 19.

液相還元法によるNi金属, Ni-Zn合金超微粒子の合成

Abstract: The liquid-phase reduction method for synthesis of metallic ultrafine particles is known to be advantageous to the production for bimetallic ultrafine particles.By use of this method, the following results were obtained.(1) In aqueous media, the increase in drop-rate of a reducer solution into a metal salt solution caused the remarkable decrease in the particle size for Ni-Zn bimetallic fine particles.(2) The strong dependency of the particle size on the synthesis temperature was found in both aqueous and nonaqueous media for Ni-Zn bimetallic fine particles(3) By means of X-ray diffraction analysis, metallic Ni ultrafine particles produced in nonaqueous media were found amorphous.(4) Amorphous Ni-Zn ultrafine alloy particles were easily produced with the addition of a reducer solution into a Ni-Zn bimetal salt solution. However, no formation of alloy phase was give the synthesis of o-Zn bimetallic ultrafine particles by the similar manner.

Bimetal nesting die without scrap

Abstract: The utility model relates to punching parallel shape, in particular to punching die for bimetallic sheets without waste materials The utility model separates and punches one point between two connected reciprocal sleeve-shaped bimetallic sheets, and one blank position of one sheet first Two identical bimetallic sheets are arranged at reciprocal sleeve-shaped effective position without waste material separation The utility model simplifies die structure, and saves materials by 30%

Improvements relating to thermal switches.

Abstract: A snap-acting bimetal blade for use as a thermally-responsive switch actuator has a generally rectangular outer shape and has a generally rhomboidal cut-out defining two spaced-apart and tapering legs connected together at their opposite ends. Such a blade shape has advantageous characteristics as regards the forces and movement that can be developed in switching operations. A thermally-responsive switch incorporating such a bimetal blade has first and second spaced-apart metal parts, one of which is formed of rigid, electrically-resistive material and the other of which is a spring member, first and second contacts provided on such parts, a bimetal blade as aforesaid welded to one of the parts, and an insulating push rod arranged for transferring switch-operating movement of the bimetal to the spring member for operating the switch. When used as a motor protection switch, the bimetal operation is dependent upon heat generated by current flow in the electrically-resistive part of the switch and the switch can be made relatively insensitive to large currents flowing for short durations, but sensitive to longer term lower currents, and can have a high ratio of "off" time to "on" time.

Laminated board for electronic material

Abstract: PURPOSE:To discriminate the surface or the rear easily and positively without damaging the quality of the surface and appearance by forming discriminating patterns having specific depth and different flat-section area factors. CONSTITUTION:Patterns for discrimination having depth, in which Rmax displaying the maximum height of a roughness curve at a time when the surface of a steel plate is measured extending over constant length by a roughness meter is brought to 10mum or less, and being shaped by the region of two kinds or more of different flat-section area factors are prepared on the bimetal board 5 of a laminated board through machining by rolls 1, 4, etc., on one surface of the laminated board for an electronic material. Accordingly, the patterns through which the surface or the rear is discriminated easily without damaging the quality of the surface and appearance because the patterns do not depend upon printing, etc., are formed with excellent profitability, and a bimetal, etc., in which the laminated boards are laminated can be prepared without mistake.

Low speed heat accumulating compensator

Abstract: PURPOSE:To enable low speed heat accumulating compensation to be performed by a simple structure at low cost by method wherein an elastic member and a heat sensitive deformable member are used in order to push a thermal head against a platen and the heat sensitive deformable member is deformed by heating with the thermal head. CONSTITUTION:A spring 26 is provided between one end of a thermal head 11 and the other side base stand 25, and the spring 26 pushes the thermal head 11 against a platen 14. A bimetal 28 being a heat sensitive deformable member is provided between the other end of the thermal head 11 and another side base stand 27, and the bimetal 28 adjusts strength for pushing the thermal head 11 against the platen 14. The thermal head 11, a radiation fin 12, and the bimetal 28 are simultaneously heated by heat accumulated with the thermal head 11. The bimetal 28 is deformed by heating with the thermal head 11, and the thermal head 11 moves upwards. Therefore, pressing contact force F is decreased, and printing density is decrease to perform low speed heat accumulating compensation. Further, the bimetal 28 returns to a original state as the heated thermal head 11 is being cooled, and the pressing contact force F of the thermal head 11 is increased. Low speed heat accumulating compensation is performed by repetition of such operation.

Bimetal switch and manufacture thereof

Abstract: PURPOSE:To facilitate the manufacture and certainly open and close a contact by positioning 2 predetermined portions including the respective ends of a first and a second terminal members on 2 planes paralleled with each other. CONSTITUTION:A plate member 3D consisting of a plurality of sets of a pair of terminal portions 21, 22 and a connecting portion 23 to connect them is made of a sheet of hoop material by punching, and this punched plate member 30 is bent to form 2 terminal members 31, 32. That is, 2 tip-side portion 24, 25 including the tips 21A, 22A of the respective terminal portions 21, 22 are formed such that the 2 tip-side portions 24, 25 exist on 2 planes parallel with each other. The movable contact 41 of a bimetal member 40 is, therefore, on a plane different from the plane of the first terminal members 31, 32 where the bimetal 40 is fixed. Thereby, when the bimetal member 40 generates heat to make inversion, it is possible to certainly make abutting and separating between the movable contact 41 and a fixed contact 42.

Bimetallic temperature switch

Abstract: PURPOSE:To improve the heat responsiveness of a switch by providing a ring- like fin situated just under the seating part of bimetal and extending toward a discharge-chamber side, on a plane opposite a plane which the bimetal is seated on the bottom of a projecting part within a discharge chamber housing. CONSTITUTION:A recessed plane 23d is formed on the upper plane of the bottom 23c of a projecting part 23, whereon bimetal 21 is disposed, and the bimetal 21 is seated on the peripheral seating part 23e of this recessed plane 23d. And a ring-like fin 24 is projected toward a discharge-chamber side from a plane opposite the peripheral seating part 23e of the bottom 23c. The fin 24 has its inner circumferential wall 24a situated almost just under the peripheral seating part 23e. The heat that a refrigerant within a discharge chamber 2 has is absorbed by the bottom 23c of the projecting part 23, the fin 24, etc., for being transmitted from the peripheral seating part 23e to the bimetal 21. When a temperature in a refrigerant within the discharge chamber reaches a given bimetal inversion temperature, the bimetal is accordingly displaced with excellent responsiveness for causing a switch to be quickly turned on and off.

Protective circuit of refrigerating device

Abstract: PURPOSE:To economically make it possible by a simple means to protect a refrigerating device from a serious accident of a burning fire and the like by connecting a means for blocking a circuit when a normal or more current flows for a normal time at the nearest position to the side of electric power supply on an electric circuit. CONSTITUTION:When a bimetal switch 9 is arranged at the nearer position to the side of power source supply than any electric device of a cold storage and a normal or more current is allowed to flow in a heater part 9h related to an excess current sensing part, this heating value increases, so that a switch 9s related to a closing and opening switch by a bimetal inverts its shape to open. At the time of rated current voltage impression, since the heating value of the heat part 9h is small, the switch 9s is not inverted and its circuit is closed as its shape keeps. When an abnormal high voltage is impressed in the electric circuit and the normal or more current is allowed to flow in the heater part 9h of a bimetal switch 9 for a normal time, this heating value increases, so that the switch 9s inverts its shape by a bimetal action to open and the cold storage is electrically protected from the abnormal high voltage.

Effect of temperature and deformation on the destruction of bimetal steel 80-steel 12Kh18N10T

Abstract: Many structural composite materials operate under elevated temperature conditions The properties of these materials at temperatures exceeding 600 o C have been previously studied although there is practically no information in the literature about their operation at 200-500 o C In view of this a study was made in the present work of a composite material (bimetal) which is a cylindrical core of carbon steel 80 clad with steel 12Kh18N10T The study of the bimetal and its components was performed at 200-500 o C The effect of prior plastic deformation at these temperatures on bimetal properties was studied simultaneously

Cycling bimetal circuit breaker

Abstract: A PMB circuit breaker comprises a bimetal compensator (1) fastened to a U shaped bimetal armature (3). The high expansion layer of the compensator is in contact with the low expansion layer of the armature. In order to increase the rated ambient temperature of the circuit breaker, the widths of the compensator and the armature are the same.

Bearing material made of double-layered iron-copper-lead system sintered alloy

Abstract: PURPOSE:To largely increase the adhesive strength and improve the antiseize property, in a bimetal type bearing material, by forming a copper-plated layer having a predetermined thickness between a steel back plate and an iron-copper- lead system sintered alloy. CONSTITUTION:The bimetal type bearing material consists of a steel back plate and an iron-copper-lead system sintered alloy whose main component is iron. a copper-plated layer having a thickness of 2 to 20mum is formed between this steel back plate and the iron-copper-lead system sintered alloy. The components of this sintered alloy are as follows: copper: 10 to 40wt.%; tin: 1 to 7wt.%; lead: 10 to 40wt.%; phosphorus: 0.5wt.% and under; graphite: 0.5 to 4wt.%; at least one of zinc, nickel, and boron: 5wt.% and under; and the remainder consists of iron. With this contrivance, the adhesive strength of the material can largely be increased, while the antiseise property can be improved.

Mixed-type crack growth rate in a 30KhGSA steel-VRP-10 solder bimetal

Abstract: In this work the rate of mixed I-II crack growth rate was investigated in a 30KhGSA steel-VPR-10 nickel-base solder bimetal in repeated static loading of a ring specimen consisting of alternating layers in the circumferential direction

Double heat-sensitive flow control valve

Abstract: PURPOSE:To perform flow control in response to fluid temperature or optionally by heat sensitively operating a bimetal restricting the position of a valve disk with the heat conduction from a fluid via a heat transfer element such as a heat pipe or with a heater. CONSTITUTION:The temperature of a fluid into a valve chamber 4 from a passage 2 is transferred to a bimetal 14 via a heat pipe 12, the bimetal 14 is deformed in the thickness direction according to the temperature, the position of a valve disk 6 against a valve seat 5 is changed, and the fluid flow from a passage 3 is controlled according to the fluid temperature. When the flow is to be optionally controlled, not by the fluid temperature, the temperature in a working space 8 is changed with an electric heater 17, the bimetal 14 senses the temperature change and is deformed, thus the opening of the valve seat 5 is controlled by the valve disk 6. In this case, the pressure change in the working space 8 is absorbed by the bellows 10, and the bellows 10 are operated as heat radiating fins. The flow control by temperature or artificial control can be performed.

Bump electrode for semiconductor device

Abstract: PURPOSE:To prevent the damage at the joint of a bump electrode to a chip as well as the deterioration in the characteristics due to the permeation of atmospheric air from occurring by a method wherein the shape and size of an upper side metallic film is formed almost similar to those of a bump electrode while a lower side metallic film is formed to protrude outside from the edge of the upper side metallic film. CONSTITUTION:An upper side metallic film 6 constituting a bimetal film is filmed in almost the same shape and size as those or the bottom part of a bump electrode 7 while the lower side metallic film 5 is formed to protrude outside from the edge of the upper side metallic film 6. Accordingly, the dimension of the bimetal composed of both metallic films 5, 6 normally in different thermal expansion coefficient is contracted to reduce the degrees of inner thermal stress or warp; besides, when the bimetal film is backed with a metal 7 for the bump electrode, the inner stress of the bimetal is displaced and the warp is actually eliminated as well as any crack or damage is avoided during heating and cooling processes. Through these procedures, the troubles such as the damage at the base of the bump electrode 7 to a chip as well as the deterioration in the characteristics of a semiconductor device due to the permeation of atmospheric air from the damaged part can be prevented from occurring.

Fluid coupling with housing - has drive shaft with cover, plate and valve plate, with bimetal and absorber

Abstract: The fluid coupling has a housing supported by a drive-shaft and to which a cover (6) is fixed. A plate fixed to the. cover (6) is divided into an accumulator part and operating part in which is a rotor. A valve plate opens or closes an opening in the plate. A pin (12) supported by the cover is fixed tothe valve plate and has a bimetal (13) on the inner end of the pin (12) and outer end (19) of the cover. Between the cover and the bimetal (13) is an absorber consisting of a rubbe and support (21) fixed to the cover.

Push-button operation type ovecurrent relay

Abstract: PURPOSE: To provide an overcunrrent protection switch with increased repeatability of an operation release rating value and decreased its deviation by adjusting a response value of a bimetal through rotating a connecting tongue piece around a predetermined narrow part. CONSTITUTION: A overcurrent protection switch has a narrow part 111 arranged between a connecting tongue piece 105 of a connecting member 106 for a leg end 104 of a bimetal 101 and a region of the connecting member 106 adjacent to a corresponding contacting part 9 fixed to a casing. A slit which passes through a plate-like central section in the connecting member 106, and penetrates the plate plane in a transverse direction is formed on the narrow part 111. The connecting tongue piece 105 rotates around the narrow part 111 by 6 load imposed by an adjusting screw 110 for adjusting a response value of the bimetal 101. By this structure, operation release value of the bimetal 101 is adjusted mutually in an especially delicate and accurate manner using tension of both leg ends of the bimetal.