Showing papers on "Bimetal published in 1981"

Bimetal flange connector

Abstract: A bimetal flange connector (10) for connecting components (15) of a piping system such as fittings or pipe in which the bimetal flange connector (10) has a hub or preformed inset (12) of a first metal material compatible with the piping system components (15) enabling welding, brazing or other method to be utilized in connecting the inset (12) to the piping system component. The bimetal flange connector (10) has a rim (14) of a second metal material castable directly onto said inset (12). The rim (14) is retained on the inset (12) by a shrink fit on cooling, a metallurgical bond, a preformed retainer configuration of the inset or a combination of the foregoing. For certain combinations, of low carbon inset material and high carbon rim material, the inset (12) is prepared for the cast-on rim (14) by the interposition of a boundary layer (45) of carbon migration inhibiting material to prevent carbon migration from the cast-on rim (14) from adversely affecting the properties of the inset (12 ). The bimetal flange connector (10) allows the inset (12) to be of one composition with desirable characteristics for connecting to a piping system component (15) and the rim (14) to be of a second material with desirable characteristics for mechanical connection to a mating flange, one preferred embodiment employing a stainless steel inset (12), a ductile iron rim (14) and an interposed chromium boundary layer (45) at the interface juncture of rim and inset.

Copper bimetal brazed resistance welding electrode

Abstract: A bi-metal resistance welding electrode has a dispersion strengthened copper tip and a high conductivity copper shank. The electrode is made by forming a tip member in two successive upsetting operations to produce a tip member having a coating of high conductivity copper covering substantially all of one end thereof. A solid, high conductivity copper, cylindrical billet is formed and brazed to the tip member at its coated end to form an extrusion blank. The extrusion blank is back extruded with the high conductivity copper material being worked substantially, while only partially back extruding the tip portion of the extrusion blank.

Vibro-isolating rubber device

Abstract: PURPOSE:To prevent a damping effect of vibration from changing due to temperature, by utilizing viscosity damping force through liquid to an engine mounting device and constituting the engine mounting device in such a manner that area of throttle passages is controlled in accordance with a change of temperature. CONSTITUTION:Chamber spaces 9 and 14 are communicated to each other through throttle passages 16 and 17, formed in a frame body 1, and liquid is sealed internally of these chambers. A valve element 18 opens the throttle passage 16, with a bimetal element 22 at prescribed temperature or less, while closes the throttle passage 17, with the bimetal element at prescribed temperature or more. Accordingly, change of a vibration damping effect due to temperature change can be reduced.

Bimetal driven control valve

Abstract: A bimetal driven control valve comprises: a main body having an inflow channel, an outflow channel, and an orifice which connects the inflow channel and the outflow channel; a first bimetal which constitutes part of a tubular body, an outer portion of the bimetal being fixed to the main body; a second bimetal which constitutes part of the tubular body and whose outer circumferential surface is formed by the same metal used for the inner circumferential surface of the first bimetal, and whose inner circumferential surface is formed by the same metal used for the outer circumferential surface of the first bimetal, the inner circumferential surface of the second bimetal being opposed to the inner circumferential surface of the first bimetal: hinges for connecting respective ends of the first and second bimetals to form the tubular body; a value member which is mounted in the main body and which is connected to an outer portion of the second bimetal for moving the valve member between a first position at which the orifice is closed by its other end and a second position at which the orifice is released to be open in correspondence with the radial movement of the second bimetal; and heating wire for heating the first bimetal.

Temperature responsive switch

Abstract: A temperature responsive switch is provided which comprises a pair of bimetal discs having different temperature-deformation characteristics, a pair of fixed electrical contacts and a movable electrical contact. The movable contact engages one of the fixed contacts in response to a deformation of the pair of bimetal discs or remain free from engagement with either fixed contact. The engagement of the movable contact with one or the other of the fixed contacts and the absence of its engagement with either fixed contact constitute three conditionswhich permits a detection of a temperature of at least three different regions.

Bimetal assembly for a thermally releasing switchgear.

Abstract: A bimetal assembly for a thermally releasing switch gear consists of a bimetal strip (3), which causes the release, and a hot wire (1) connected thereto and designed in a U-shape. A bridge part (5) is provided between the limbs of the U (2) against which it is supported and with which it is electrically connected, the bridge part (5) being located parallel to at least a part of the hot wire so that, as a result of the position of the bridge part on the limbs, the quantity of heat passed through the hot wire (1) to the bimetal strip (3) can be determined as a function of the current flowing through the hot wire. This arrangement facilitates the release of the switch gear using the same resistance and bimetal parts for different release regions.

Corrugated bimetal valve

Abstract: PURPOSE:To both obtain strong operating power and provide a sharp response to an ambient temperature change in a bimetal valve for performing the open-close operation of a flow line according to fluid temperature, by providing a part, formed into a concentric circular wave shape, in a disc-shaped bimetal. CONSTITUTION:When high temperature fluid is existent in a valve chamber 4, a bimetal 20 is curved to compress a coil spring 19 and depress a valve stem 13, then a valve head of a valve body 12 closes a valve port 9. If fluid temperature is lowered, the bimetal 20 becomes flat to open the valve port 9. Then the fluid in the valve chamber 4 passes through lateral and longitudinal holes in a valve seat member 8 to flow from the valve port 9 to an outlet 10. If temperature of fluid flowing into the valve chamber 4 from an inlet 6 rises, the valve is opened by the bimetal 20. Said bimetal 20, being formed in a disc shape, can both display strong operating power and provide the large displacement of a valve stem B. While the bimetal 20, being shaped in a waveform, can promptly perform the transfer operation of heat with fluid in the surroundings thus to provide a sharp response to a temperature change.

Bimetal coil mounting arrangement for viscous fluid coupling

Abstract: A temperature responsive viscous fluid coupling of the type having a bimetal coil secured at the outer end thereof to a cover member and at the inner end thereof to a rotatable shaft for controlling the fluid coupling is provided with at least one resilient member for engaging the radial outermost surface of the bimetal coil and an axially directed surface of the bimetal coil at a point circumferentially spaced from the outer end of the bimetal coil by approximately 150°.

Coil spring biased current limiter

Abstract: First and second fixed terminals are mounted in a casing and have one ends projecting out of the casing. Inside the casing, a bimetal extends between the first and second fixed terminals, the bimetal having one end secured to the first fixed terminal. The other end of the bimetal is held in engagement with one end of a coil spring disposed around a pivotable lever pivotably supported on the casing, the other end of the coil spring engaging the pivotable lever. When a current flowing through the bimetal exceeds a predetermined amount, the bimetal is bent to cause a contact supported on a distal end thereof to move rapidly out of contact with a contact supported on the second fixed terminal under the resiliency of the coil spring acting on the bimetal.

Effects of strain hardening in hydrostatic extrusion of axisymmetric bimetal rods

Abstract: (1981). Effects of strain hardening in hydrostatic extrusion of axisymmetric bimetal rods. Metals Technology: Vol. 8, No. 1, pp. 75-76.

Driving device for choke valve

Abstract: PURPOSE:To speed up the opening of a choke valve after warm-up of an engine by a method wherein the amount of an electric current fed to a heating member for opening the choke valve of a carburetor is regulated by the signals from a bimetal and an engine temperature sensor CONSTITUTION:A bimetal 4 which is heated by a heating member 5 and opens a choke valve 3 of a carburetor is engageably placed at the valve shaft 9 of the choke valve 3 The bimetal 4 is fitted with a bimetal tempreature sensor 6, of which the signal is inputted into a controller 8 together with the signal from an engine temperature sensor 7 detecting the temperature of cooling water When engine temperature is increased, the amount of the electric current fed to the heating member 5 is increased to speed up the opening of the choke valve 3

Metallvapor discharge lamp

Abstract: PURPOSE:To prevent the generation of high surge voltage, and thereby obviate the insulation breakdown of a stabilizer or the like, by using a heat responsive element such as a bimetal switch which is usually opened and which operates by discharge, and by charging the outer tube with a gas at a relatively low pressure. CONSTITUTION:If a high-pressure sodium lamp is connected to a power source by placing a stabilizer between them, current flows through a closed circuit consisting of a stabilizer, a metallic cap 21, a stem lead 20, a lead 26, a lead 24, a bimetal 4, a contact 23, a lead 17, a supporting frame 14, a stem lead 19, a metallic cap 21 and the stabilizer. A bimetal 4 operates by heat produced by the discharge between the contacts 22 and 23, the connection between the contacts 22 and 23 is cut off, and a lamp is lit by the discharge between the electrode 2 and 3. Since a gap is charged within an outer tube 7, a part of surge-voltage energy, which is generated by the operation of the bimetal 4, is consumed by the discharge between the contacts 22 and 23.

High pressure metal vapor discharge lamp with builttin starter

Abstract: PURPOSE:To facilitate a setting of the contact pressure of a bimetal switch, by providing within an outer tube of a discharge lamp an I-shaped frame made of a heat-resistant insulating material and mounting on the frame a plurality of thermoresponsive elements formed of bimetal pieces and a filament. CONSTITUTION:Within an outer tube 11 of a metal halide lamp or the like, there are arranged a luminous tube 1 as well as an I-shaped frame 26 having a base part 26a and a pair of arm parts 26b, 26c. On the frame 26, there are mounted the first and second bimetal switches 17, 18, which are formed of bimetal pieces 17b, 18b, movable contacts 17c, 18c and fixed contacts 17d, 18d respectively, and a heating filament 21. The frame 26 is supported by a support frame 12 through a mounting plate 27. Thus, when the contact pressure is adjusted so as to make the actuation time of the bimetal switch 17 shorter than that of the bimetal switch 18, its adjustment work can be performed simply and surely. In addition, the filament 21 can be retained at a fixed position. Consequently, the fabrication of a discharge lamp has been made easier.

Bimetal system flow controlling valve

Abstract: PURPOSE:To permit a protector to be economical and mounted easily by providing a bimetal system flow controlling valve with the protector constructed to be snapped onto the controlling valve body. CONSTITUTION:In a bimetal system flow controlling valve for controlling flow by sensing temperature with a bimetal 3 to operate a valve 4, a protector 7 formed of resilient material is snapped onto a controlling valve body 2 to be located by projections 8 and latched to same by hooks 9.

Temperatureesensitive control valve

Abstract: PURPOSE:To permit smooth and reliable operation without sacrifice of the sealing property by forming the spring of a bimetal disc which is thermally deformed to open and close the flow path with the bimetal material and thus obtaining proper inhanced force in accordance with the temperature. CONSTITUTION:A housing 6 is formed with first and second ports 2 and 3 and flow paths 4 and 5 therefrom and both the paths 4 and 5 are communicated by a space 8 formed in a body 7. A bimetal disc 9 provided in the space 8 is deformed in accordance with the temperature to be brought into close contact with an elastic seal 11 for closing the flow path 4. A bimetal spring 10 which urges the disc 9 has a plurality of arms 14 projecting from a central part 13. With temperature increase these arms are contracted to weaken the enhanced force so as to prevent fixing of the disc 9 and seal 11 to each other, while with temperature reduction they are extended to make up for the reduction of the elasticity of the seal 11. Thus, the flow path can be smoothly and reliably opened and closed either at the time of closure at a high temperature or at the time of opening at a low temperature.

Circuit breaker for use on AC and DC circuits

Abstract: A circuit breaker suitable for use on both AC and DC circuits includes a magnetically permeable core surrounding a current carrying conductor of the circuit breaker. A bimetal member is thermally coupled to the core such that induction heating of the core due to overload AC current flowing through the conductor is operative to deflect the bimetal and actuate a trip device. The circuit breaker also includes a pair of braided copper shunts connected between the conductor and the bimetal such that resistive heating of the conductor due to overload DC current flow through the breaker will cause the bimetal to deflect and actuate a trip device. The bimetal is mechanically isolated from the conductor such that relative movement therebetween will not affect thermal calibration of the circuit breaker.

Amorphous alloy of low thermal expansion coefficient

Abstract: PURPOSE:To enable an alloy having high electric resistane and a low thermal expansion coefficient to be manufactured at a low coat by alloying Fe with a specified amount of Si and B followed by very rapid cooling. CONSTITUTION:An Fe-Si-B alloy consisting of 3-6 atomic% Si, 82-85 atomic% Fe and 9-15 atomic% B is melted and very rapidly cooled by a twin-roll method or other method to manufacture an amorphous alloy sheet. This amorphous Fe-Si-B alloy ribbon has superior corrosion resistance and high electric resistance and undergoes a very small change such as / deg.C in the thermal expansion coefficient due to temp., so it is useful as the low thermal expansion alloy of direct heating type bimetal. Since expensive Co is not used unlike ''Invar '', this alloy is manufactured at a low cost.

Starting system of carburetor

Abstract: PURPOSE:To simplify the constitution of a starting system and make it compact by operating a starting air valve which connects and shuts off the starting air passage of a carburetor by means of a bimetal. CONSTITUTION:A suction 3 at the down stream of a carburetor throttle valve 4 and a fload chamber 5 are connected by a starter passage 8 having a fuel chamber 15 and an emulsion culinder 16. A starting air valve 9 is provided on the passage 8, said starting air valve being formed by a valve box 10 containing a rotating disc 13, a bimetal 23 provided on the shaft of the disc 13 and an electric heater 24 above said bimetal. The connecting area to the starting passage 8 is determined by the bimetal 23 which expands or contracts corresponding to the ambient temperature.

Focusing magnet device for cathodeeray tube

Abstract: PURPOSE:To maintain the amount of magnetic flux affecting on the focusing characteristics at a constant level, by forming a gap containing a bimetal at a part of a magnetic path which embraces a permanent magnet and changing the gap in accordance with temperature. CONSTITUTION:Each face of an annular permanent magnet 1 in a focusing magnet device is provided with a magnetic path member 10 consisting of a bimetal, which is formed by a magnetic metal with a low thermal expansion coefficient and containing iron and nickel as main components and a metal bonded to the magnetic metal and having a high thermal expansion coefficient, in such a manner that the magnetic metal is brought into contact with the permanent magnet 1. The upper peripheral edge of the magnetic path member 10 terminates in an outwardly flared portion 14 so as to make a gap between the magnet 1 and magnetic path member 10. The outwardly flared portion 14 defines a number of a notches 15. The magnetic resistance of the magnetic path can be changed by using temperature deformations of the bimetal. It is therefore possible to maintain the amount of the magnetic flux affecting on the focusing characteristics at a constant level, irrespective of changes in temperature.

Temp. compensated pressure switch - has rolling diaphragm with piston rod operating limit switches via bimetal elements

Abstract: Enhanced reliability of leakage sensors for switchgear using SF6 gas insulation is ensured by a temp. compensated pressure switch. It comprises bimetal elements (10,12) and a pressure sensing piston (26) controlled by a spring (1) and rolling diaphragm (25) which is subject to the pressure under surveillance. The piston displacement is followed by a rod (3) with a flange (4) bearing the bimetal pair (10,11) with the interposing link (12) while extension (6) contacts rocker (13). The rocker features two bimetal elements (15,16) for operating limit switches, the response of all the bimetal elements depending on ambient temp. through the access holes (20') in the housing.

Metal vapor discharge lamp with builttin starter

Abstract: PURPOSE:To enable the prevention of the fusing between each contact of the bimetal piece and the contact piece of a heat-responsive element, by fixing the end of the bimetal piece and the contact piece on a base plate; these two pieces stand opposite and touch each other. CONSTITUTION:When a metal vapor discharge lamp with a built-in starter is supplied with power source, the self-heating of a heat-operated device 18 and the heat of a heating filament 22 bring about the operation of the heat-operated device 18, which initiates the main discharge between main electrodes to light the lamp. Since the end of a bimetal piece 18b and a contact piece 18d which make up the heat- responsive device 18 is bent to form a right angle and is fixed to a base plate 24, the bimetal piece 18b and the contact piece 18d can be held firmly and the contact pressure between these two pieces can be easily adjusted. In addition, since each part of the surface of the bimetal piece 18b and the contact piece 18d are made in contact with each other, the local wear and the fusing of contact materials due to small discharge between contacts, such as a movable contact 18c and a fixed contact 18e, can be obviated.

Discharging lamp incorporated with ballast

Abstract: PURPOSE:In a discharging lamp where a bimetal and a ballast are contained in an outer tube, to achieve the reliable lighting by employing a bimetal having specific open function characteristic thereby setting up a constant time elasping unitl the start of opening function. CONSTITUTION:A ballast 3 and a bimetal switch 4 together with a light emitting tube 2 are contained in an outer tube. The bimetal switch 4 has such characteristic as to perform the opening, function within 1.5-40sec through self heating, when supplying the current two times of the lamp starting current in N2 gas environment of 300 To. Since the opening function is performed through self heating even if there is fluctuation due to the radiation heat from the ballast 3, heat transmitted from the bimetal through the supporting member, gas convection, etc., the arc discharging is produced reliably in the light emitting tube, resulting in stable lighting.

Metal-vapor electric-discharge lamp

Abstract: PURPOSE:To enable a proximity conductor to be smoothly separated from an emission tube after the burning of a lamp, by inserting the end of the proximity conductor, the other end of which is supported by a bimetal piece, into a supporting hole of a holder supporting the emission tube, with some space within the hole. CONSTITUTION:Arc discharge is developed between main electrodes 4a and 4b. On a stable burning of a lamp being achieved, the temperature of an emission tube 3 rises, and a bimetal switch 6 is kept opened by the heat of the emission tube 3. On the other hand, a bimetal piece 18 of a proximity conductor 5 also is heated by the heat of the emission tube 3 and is bent, thereby the conductor 5 being separated from the emission tube 3. Since the upper end of the conductor 5 is bent into a crank form, and is inserted in a supporting hole 20 provided in a holder 11a with a space within the hole 20, the bending of the bimetal piece 18 causes the conductor 5 to rotate within the supporting hole 20. Consequently, no unnatural backward stress is developed in the proximity conductor 5.

Composite fiber and spinneret for composite spinning

Abstract: PURPOSE:A composit fiber having various applications, manufacturable with a high operating efficiency, and comprising polymers A and B, which are joined in the form of a bimetal so as to be exposed partly to the surface of the fiber, and divided by polymer C into plural regions in the symmetry of rotation. CONSTITUTION:A composite fiber comprising three kinds of polymers A, B and C, which are joined in the fiber axis direction, all exposed to the fiber surface, and can be splitted into various shapes. The polymers A and B are joined in the form of a bimetal so as to be exposed partly to the surface, and the bimetal components are divided by the polymer component C into plural regions in the position of symmetry of rotation. The shapes of the components are stable and provide a high-quality product without unevenness in the fiber axis direction with a high productivity.