US3204064A - Thermal relay having movable heat transfer device - Google Patents

Thermal relay having movable heat transfer device Download PDF

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Publication number
US3204064A
US3204064A US231905A US23190562A US3204064A US 3204064 A US3204064 A US 3204064A US 231905 A US231905 A US 231905A US 23190562 A US23190562 A US 23190562A US 3204064 A US3204064 A US 3204064A
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US
United States
Prior art keywords
bimetal
contact
block
thermal relay
relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US231905A
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English (en)
Inventor
Giger Jakob
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH1294261A external-priority patent/CH389097A/de
Application filed by Landis and Gyr AG filed Critical Landis and Gyr AG
Application granted granted Critical
Publication of US3204064A publication Critical patent/US3204064A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
    • H01H53/01—Details
    • H01H53/015—Moving coils; Contact-driving arrangements associated therewith
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/012—Automatic controllers electric details of the transmission means
    • G05B11/018—Automatic controllers electric details of the transmission means using thermal amplifiers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
    • H01H53/06—Magnetodynamic relays, i.e. relays in which the magnetic field is produced by a permanent magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively

Definitions

  • a variety of constructions are known for such amplifiers including, for example, magnetic amplifiers and sensitive no-volt-age relays with large switching relays connected thereto.
  • the invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.
  • the illustrated relay has two bimetal contact devices and, arranged between them, a heat-conducting block which can be actuated by a transducer such as a rotor coil measuring mechanism.
  • the illustrated relay has two spaced, parallel bimetal laminations 41 and 42, one end portion of each being securely clamped in an electrical insulation block 43. In the vicinity of their other end portions the bimetal laminations 41 and 42 are mechanically connected by a web 44.
  • the bimetal strips 41 and 42 are relatively arranged, for example, with their sides having the greater coetficient of expansion facing away from one another.
  • Two ordinary contact springs 45 and 46 are mounted at a certain distance outside the bimetal laminations 41 and 42, one end portion of each being fixed in the block 43.
  • Two opposed electric contact elements 47 and 48 are mounted on the bimetal lamination 41 and on the contact spring 45 respectively.
  • the members 41, 45, 47 and 48 together form a first bimetal contact device having electric terminals 49 and 50.
  • bimetal lamination 42 and on the contact spring 46 there are also two opposed respective electric contact elements 51 and 52.
  • the members 42, 46, 51 and 52 together form a second bimetal contact device, which is provided with electric terminals 53 and 54.
  • the two contact devices are differentially connected.
  • a shaft 55 connected to the rotor coil 56 of a rotor coil measuring mechanism 57.
  • a stationary electric heating winding 58 used as a heating means.
  • the winding 58 is fixed on an insulating plate 59, which also carries the block 43, already mentioned, and has a hole for the passage of the shaft 55.
  • a housing 60 which is designed as a cylindrical casing and is made of material of good thermal conductance. The housing 60 encloses the heating winding 58.
  • a block 61 which is also made of material of good heat conductance and which can be reciprocated between the two bimetal strips 41 and 42 by rotating the shaft 55.
  • the block has two oblique, level outer surfaces 61a and 6111, which can bear flatly on the one bimetal lamination 41 and on the other lamination 42 respectively when the block 61 is suitably pivoted.
  • the heating winding 58 is connected through its terminals 62 to a source of electric current (not shown) and thereby heated to a given temperature.
  • the heat produced by the winding 58 is transferred by radiation and convection to the housing 60 and the block 61, so that the block acquires a temperature comparatively little below that of the heating winding 58.
  • the rotor coil 56 is connected, for example, to a bridge circuit (not shown), which is supplied from a current source (also not shown). If the bridge circuit is balanced, the rotor coil 56 assumes a position such that the block 61 is located cent-rally between the two bimetal strips 41 and 42. The heat given off by the housing 60 and by the block 61 acts uniformly on the two bimetal strips 41 and 42, so that the latter have the same temperature. Any bending of the bimetal strip 41 is opposed by identical bending of the other bimetal strip 42, and vice versa, since the strips are connected by the web 44. The contact elements 47 and 51 therefore remain in their rest position in spite of the heating of the bimetal strips 41 and 42.
  • the rotor coil 56 is rotated in one or other direction, whereby the block 61 is moved towards and finally comes into contact with either the bimetal strip 41 of the bimetal strip 42.
  • the bimetal strip which is closer to or in contact with the block 61 is heated more intensely than the other, thus producing deformation of the connected bimetal strips and movement of the contact elements, e.g., 47 and 51.
  • the contact elements 51 and 52 make contact when the block 61 is moved towards the bimetal strip 41.
  • the contact elements 47 and 48 make contact when the block 61 is moved towards the bimetal strip 42.
  • the block 61 accordingly enables one or the other of the bimetal strips to be thermally connected to the heating means 58.
  • the bimetal strips 41 and 42 can also be relatively arranged so that their sides having the greater coefficient of expansion are on the inside, i.e., facing one another.
  • the reverse arrangement previously described is particularly favorable, however, since, when the block 61 is pivoted out of its central position, the more intensely heated bimetal strip bends towards the block 61 and is therefore heated to a still greater extent, thus accelerating the bending of the connected bimetal strips 41 and 42 and producing more rapid contact closing. Conversely, the opening of the contacts is also accelerated when the block 61 pivots back into its central position, since the bimetal strip which was previously heated more intensely simultaneously bends outwardly, i.e., away from the block,
  • the arrangement has the advantage that contact-making and contactopening is effected in a more positive manner.
  • the bimetal relay described enables other higher power circuits to be reliably controlled by small electric voltages or currents applied to the rotor coil 56, particularly with the aid of the robust contact elements 47, 48 and 51, 52 and the attendant, comparatively large, contact pressure. Moreover, only very small forces are required to pivot the rotor coil 56 and block 61, since the movable system has little mass moment of inertia and can be mounted almost without friction, for example by means of conical bearings.
  • the contact pressure is produced by means of the heat energy acting on the bimetal strips 41 and 42.
  • the bimetal relay according to the invention has the advantage that with it strong contacts can be simply, cheaply and reliably operated with strong contact pressure from small measured values. It is distinctive in that the initial input need move only a small, light control element which is mountedalmost without friction and has a very low mass movement of inertia. The system thus requires only very small actuating forces.
  • the necessary contact pressure is produced by the bimetal strips, so that the system according to the invention acts to a certain extent like a simple servo-system, where small force inputs, for example about 0.1 g., produce linear displacement of the heating or cooling lug which serves as a movably mounted control element, and where a contact force many times larger, for example about g., is nevertheless obtained with frictional contact-making.
  • a further advantage of the bimetal relay described is that, owing to the stationary arrangement of the heating means 58, no flexible wiring connections are needed for the heating winding. Further insulation of the coil 56 of the measuring mechanism from the heating winding 58 is easily effected.
  • a thermal relay for providing an output indication in response to an applied electrical signal, comprising bimetallic contact means for providing said output indication; electromechanical means connectable for response to said applied electrical signal and operative to assume a position which is a function of said applied signal; heating means; and a thermally conductive control member positioned by said electromechanical means and mounted for movement into and out of engagement with said contact means, said control member being in heat conducting relationship with said heating means and selectively operable to transfer heat to said bimetallic contact means by direct contact therewith.
  • a thermal relay for providing an output indication in response to an applied electrical signal, comprising a pair of contacts; a pair of spaced-apart bimetal members mechanically interconnected for synchronous movement between said contacts; electromechanical means connectable for response to said applied signal and operative to assume an angular position which is a function of said applied signal; heating means disposed between said bi metallic members; and a thermally conductive control member positioned by said electromechanic means and mounted for movement into and out of engagement with said bimetallic members, said control member being in heat conducting relationship with said heating means and selectively operable to transfer heat to said bimetallic members by direct contact therewith.
  • a thermal relay in accordance with claim 4 wherein said heating means is stationary and said control member is mounted to rotate about said stationary heating means.
  • control member includes at least two planar surfaces and is disposed so that one of said planar surfaces can engage one of said bimetallic members when said control member rotates in one direction and so that the other of said planar surfaces can engage the other of said bimetallic members when said control member rotates in the opposite direction.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Thermally Actuated Switches (AREA)
US231905A 1961-11-08 1962-10-22 Thermal relay having movable heat transfer device Expired - Lifetime US3204064A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1294261A CH389097A (de) 1961-11-08 1961-11-08 Bimetallrelais
CH865062A CH397087A (de) 1961-11-08 1962-07-18 Bimetallrelais

Publications (1)

Publication Number Publication Date
US3204064A true US3204064A (en) 1965-08-31

Family

ID=25703579

Family Applications (2)

Application Number Title Priority Date Filing Date
US231905A Expired - Lifetime US3204064A (en) 1961-11-08 1962-10-22 Thermal relay having movable heat transfer device
US231931A Expired - Lifetime US3207872A (en) 1961-11-08 1962-10-22 Thermal bimetallic relay

Family Applications After (1)

Application Number Title Priority Date Filing Date
US231931A Expired - Lifetime US3207872A (en) 1961-11-08 1962-10-22 Thermal bimetallic relay

Country Status (5)

Country Link
US (2) US3204064A (es)
CH (1) CH397087A (es)
DE (1) DE1170548B (es)
GB (1) GB979180A (es)
NL (2) NL282262A (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765191A (en) * 1972-06-21 1973-10-16 Gen Motors Corp Timer circuit-automotive compressor
US4088976A (en) * 1975-10-14 1978-05-09 Technar, Inc. Thermally operated bimetal actuator
US4053137A (en) * 1976-01-16 1977-10-11 De Laval Turbine Inc. Electromechanically operated valve
DE102004019178A1 (de) * 2004-04-16 2005-11-03 Abb Patent Gmbh Installationsschaltgerät
CN101132779B (zh) * 2005-03-07 2016-03-16 拜尔健康护理有限责任公司 用于治疗癌症的包含ω-羧芳基取代的二苯基脲的药物组合物

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB255335A (en) * 1926-01-23 1926-07-22 Frank Willis Sturgess An improved electric two-way intermittent switch
US1974188A (en) * 1932-04-04 1934-09-18 Curtis J Martin Circuit making and breaking device
DE621639C (de) * 1927-07-02 1935-11-11 Alfred Huster Dipl Ing Strahlungssteuerwerk
US2195947A (en) * 1937-03-31 1940-04-02 Gen Electric Heat control device
US2225975A (en) * 1939-03-30 1940-12-24 Sangamo Electric Co Temperature compensation of thermal devices
CA409605A (en) * 1942-12-29 W. Jones Benjamin Motor control device
DE730547C (de) * 1939-06-24 1943-01-14 Carl Schellhase Kraftschalter fuer selbsttaetige Regler fuer eine beliebige, von einem Fuehler erfasste Zustandsgroesse
US2371018A (en) * 1943-04-16 1945-03-06 Union Switch & Signal Co Thermal relay
CA448355A (en) * 1948-05-04 J. Koci Ludvik Temperature responsive control mechanism
CA485713A (en) * 1952-08-12 N.V. Philips Gloeilampenfabrieken Fluorescent lamp starting apparatus
US2611855A (en) * 1947-05-02 1952-09-23 Proctor Electric Co Electric blanket control
DE856370C (de) * 1941-02-20 1952-11-20 Carl Schellhase Kraftschalter zur selbsttaetigen Regelung technisch-physikalischer Groessen
FR1109484A (fr) * 1954-07-26 1956-01-30 M & A Delord Soc Ind Perfectionnement aux appareils de mesure utilisés pour le contrôle permanent
US2744178A (en) * 1952-05-24 1956-05-01 Curtis R Eckberg Control apparatus
US2803722A (en) * 1955-10-17 1957-08-20 Cutler Hammer Inc Protective switches
CA551058A (en) * 1957-12-31 Stensholms Fabriks Aktiebolag Power regulators for electric heating apparatus
US2836366A (en) * 1954-02-09 1958-05-27 Curtis R Eckberg Control apparatus
DE1077446B (de) * 1958-02-21 1960-03-10 Rau Swf Autozubehoer Schalter zum Einschalten eines Signalstromkreises bei Messinstrumenten
US2969917A (en) * 1957-06-24 1961-01-31 Gen Controls Co Space heating control system affected by external temperatures
US3064103A (en) * 1958-05-22 1962-11-13 Controls Co Of America Variable thermostat anticipator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA555058A (en) * 1958-03-25 H. F. D. Schmidt Johann Process for treating oils

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA551058A (en) * 1957-12-31 Stensholms Fabriks Aktiebolag Power regulators for electric heating apparatus
CA409605A (en) * 1942-12-29 W. Jones Benjamin Motor control device
CA448355A (en) * 1948-05-04 J. Koci Ludvik Temperature responsive control mechanism
CA485713A (en) * 1952-08-12 N.V. Philips Gloeilampenfabrieken Fluorescent lamp starting apparatus
GB255335A (en) * 1926-01-23 1926-07-22 Frank Willis Sturgess An improved electric two-way intermittent switch
DE621639C (de) * 1927-07-02 1935-11-11 Alfred Huster Dipl Ing Strahlungssteuerwerk
US1974188A (en) * 1932-04-04 1934-09-18 Curtis J Martin Circuit making and breaking device
US2195947A (en) * 1937-03-31 1940-04-02 Gen Electric Heat control device
US2225975A (en) * 1939-03-30 1940-12-24 Sangamo Electric Co Temperature compensation of thermal devices
DE730547C (de) * 1939-06-24 1943-01-14 Carl Schellhase Kraftschalter fuer selbsttaetige Regler fuer eine beliebige, von einem Fuehler erfasste Zustandsgroesse
DE856370C (de) * 1941-02-20 1952-11-20 Carl Schellhase Kraftschalter zur selbsttaetigen Regelung technisch-physikalischer Groessen
US2371018A (en) * 1943-04-16 1945-03-06 Union Switch & Signal Co Thermal relay
US2611855A (en) * 1947-05-02 1952-09-23 Proctor Electric Co Electric blanket control
US2744178A (en) * 1952-05-24 1956-05-01 Curtis R Eckberg Control apparatus
US2836366A (en) * 1954-02-09 1958-05-27 Curtis R Eckberg Control apparatus
FR1109484A (fr) * 1954-07-26 1956-01-30 M & A Delord Soc Ind Perfectionnement aux appareils de mesure utilisés pour le contrôle permanent
US2803722A (en) * 1955-10-17 1957-08-20 Cutler Hammer Inc Protective switches
US2969917A (en) * 1957-06-24 1961-01-31 Gen Controls Co Space heating control system affected by external temperatures
DE1077446B (de) * 1958-02-21 1960-03-10 Rau Swf Autozubehoer Schalter zum Einschalten eines Signalstromkreises bei Messinstrumenten
US3064103A (en) * 1958-05-22 1962-11-13 Controls Co Of America Variable thermostat anticipator

Also Published As

Publication number Publication date
CH397087A (de) 1965-08-15
US3207872A (en) 1965-09-21
GB979180A (en) 1965-01-01
NL121140C (es)
NL282262A (es)
DE1170548B (de) 1964-05-21

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