US3518592A - Holding relay with operating characteristics which remain constant with fluctuations of temperature - Google Patents

Holding relay with operating characteristics which remain constant with fluctuations of temperature Download PDF

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Publication number
US3518592A
US3518592A US712802A US3518592DA US3518592A US 3518592 A US3518592 A US 3518592A US 712802 A US712802 A US 712802A US 3518592D A US3518592D A US 3518592DA US 3518592 A US3518592 A US 3518592A
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US
United States
Prior art keywords
magnet
armature
flux
holding relay
holding
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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
US712802A
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English (en)
Inventor
Werner Bosch
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Siemens AG
Siemens Corp
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Siemens Corp
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Publication date
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/01—Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H2047/025—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay with taking into account of the thermal influences, e.g. change in resistivity of the coil or being adapted to high temperatures

Definitions

  • a holding relay which has operating characteristics that remain unchanged with temperature fluctuations comprising a magnetic structure which has an armature supported by springs.
  • a principal permanent magnet is attached to the main magnetic structure of the relay and an auxiliary permanent magnet is attached to the armature.
  • the principal and auxiliary magnets are magnetized in a direction transverse to the main magnetic field of the magnetic circuit.
  • This invention relates in general to holding relays and in particular to a holding relay which has an operating characteristic that does not vary with temperature.
  • OX materials a material of high coercive force
  • Barium oxide or strontium oxide are examples of OX materials.
  • FIG. 1 is a perspective View of a holding relay according to this invention.
  • FIG. 2 is a sectional view taken on line X-Y from FIG. 1.
  • FIG. 1 shows the holding relay of this invention which has a main magnetic system comprising the E-shaped magnetic member M formed with a center leg M1 and end legs M2 and M3. An energizing winding W is wound about the center leg M1 to control the relay.
  • the center leg M1 is formed with a tapered end portion M1 upon which is mounted a principal permanent magnet DM1.
  • the surface between the portion M1 and the magnet DM1 is preferably tapered so as to form a tapered surface S and the magnet DM1 is suitably tapered to mate with the surface S as shown.
  • An armature A is pivotally attached to the legs M2 and M3 of the main magnetic structure M by springs F and F which are suitably attached to the legs M2 and M3 and which have engaging portions F1 and F1 that receive the legs A and A" of the armature A therein.
  • a bracket H is attached to the main magnetic portion and extends upwardly toward the armature A.
  • the bracket H has supporting arms H1 and H2 to which is mounted an auxiliary permanent magnet DM2.
  • a flux directing panel B may be attached to the arms H1 and H2 of bracket H adjacent Holding relays constructed from OX materials are used tures a higher response current must be specified for ma sons of safety than would be necessary at lower operating temperatures. The sensitivity of response and the specification of the response current for a relay must be carefully specified in relays of high quality.
  • a holding relay with a main magnetic circuit and an armature which has a principal permanent magnet of OX material attached to the main magnet circuit and with the principal magnet magnetized in a direction transverse to the upper portion relative to FIG. 1 of the auxiliary magnet DM2 to concentrate the flux in the auxiliary magnet.
  • the principalmagnet DM1 and auxiliary magnet DM2 are magnetized so that the flux from these magnets is transverse to the flux in the main magnetic core M which is produced by the control winding W.
  • the principal magnet DM1 and auxiliary magnet DM2 would be magnetized so that the flux produced by these magnets would be transverse to the flux through the leg M1, for example.
  • FIG. 2 is a sectional view on line X-Y from FIG. 1 and illustrates a modification wherein the auxiliary magnet DM2 is magnetized so that its opposite ends 31 and 32 are oppositely poled.
  • the north pole is adjacent the bracket portion H and the south pole is adjacent the armature portion A
  • the north pole is adjacent the armature portion A and the south pole is adjacent the bracket portion H.
  • the magnets DM1 and DM2 may be made of OX material such as barium oxide or strontium oxide.
  • a relay constructed according to this invention may be used over a wide temperature range such as between C. to 40 C. (212 F. to 40 F.).
  • the variation in strength of the permanent magnets used in the invention caused by temperature is compensated by the structure according to this invention so that identical operating values are obtained over considerable temperature variations. It has been found desirable to utilize permanent magnets DM1 and DM2 of identical magnetic materials if the operating characteristics must be maintained constant over a wide temperature range. If
  • the magnets DM1 and DM2 are generally attached to the armature and portion M1 by suitable glue, for example. If the attachment of the armature A to the main magnetic structure M is by springs, the springs should be chosen so that they do not bias the armature in either direction toward its rest or holding position. To facilitate ease of production, it is desirable to have the principal magnet DM1 and the portion M1 of the central leg M1 of fairly constant cross-sectional area. This allows the principal magnet DM1 to be attached to the yoke as by gluing and then the exciter coil W may be pushed over the central yoke leg M1 to complete the construction, providing the slant surface S between the principal magnet DM1 and the portion M1 obtains eflicient utilization of space.
  • the surface of magnet DM1 adjacent surface S is designated DM12 and the opposite surface of the magnet is designated DM1.1.
  • the flux-directing panel B adjacent the auxiliary magnet DM2 on the side away from the armature A substantially increases the force on the armature over a structure without the flux panel B.
  • the panel B also isolates the auxiliary magnet DM2 from external magnetic influences.
  • the, principal and auxiliary magnets DM1 and DM2 are magnetized similarly.
  • the auxiliary magnet may be magnetized with opposite poles at its two ends 31 and 32.
  • a partitioning panel T may also be mounted between the armature A and the auxiliary magnet DM2. The partitioning panel T may be supported from the bracket H, for example.
  • Both of the permanent magnets DM1 and DM2 are magnets with high coercive force which can be manufactured from OX materials. Such magnets will not be de-magnetized under customary counter-energizing forces. Since the permanent magnets are magnetized at right angles to the main energizing field they are not subject to being demagnetized.
  • the auxiliary magnet DM2 holds the armature firmly in the rest position.
  • the auxiliary magnet ,DM2 generates a force upon the armature which is opposite to the force of the principal magnet DM1 and it is larger than that of the principal magnet DM1. Since no energizing flux passes through the auxiliary magnet DM2, it could be made from an alnico material, if desired. However, it has been found desirable to select both permanent magnets DM1 and DM2 from materials as similar as possible.
  • a control signal is applied to winding W to move the armature A from rest to the closed position.
  • the winding W when energized, produces flux strong enough to move the armature from magnet DM2 to engagement with magnet DM1.
  • a second control signal is applied to winding W which counters the flux of magnet DM1, the armature will move to the rest position into engagement with magnet DM2. It is to be noted that the flux caused by winding W passes through magnet DM1.
  • a holding relay which has operating characteristics that do not change with temperature comprising (a) an actuating magnetic circuit means formed with at least twowing-shaped legs which are joined at first ends, (b) an energizing coil for passing magnetic flux through said legs, ,(c) an armature movably mounted on the wingshaped legs of Slld actuating magnetic circuit means and spring-biased to a rest position and movable to a first position to provide a low reluctance path between the second ends of said Wing-shaped legs, and (d) a permanent, magnet mounted on one of said wing-shaped legs and magnetized so that its flux is transverse to the flux caused by the energizing coil.
  • a holding relay according to claim 1 comprising a second permanent magnet mounted adjacent the actuating magnetic circuit to hold the armature in the rest position.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US712802A 1967-04-27 1968-03-13 Holding relay with operating characteristics which remain constant with fluctuations of temperature Expired - Lifetime US3518592A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0109576 1967-04-27

Publications (1)

Publication Number Publication Date
US3518592A true US3518592A (en) 1970-06-30

Family

ID=7529626

Family Applications (1)

Application Number Title Priority Date Filing Date
US712802A Expired - Lifetime US3518592A (en) 1967-04-27 1968-03-13 Holding relay with operating characteristics which remain constant with fluctuations of temperature

Country Status (13)

Country Link
US (1) US3518592A (enrdf_load_stackoverflow)
JP (1) JPS4833473B1 (enrdf_load_stackoverflow)
AT (1) AT289935B (enrdf_load_stackoverflow)
BE (1) BE714289A (enrdf_load_stackoverflow)
CH (1) CH470749A (enrdf_load_stackoverflow)
DE (1) DE1614516B1 (enrdf_load_stackoverflow)
DK (1) DK126457B (enrdf_load_stackoverflow)
ES (1) ES352092A1 (enrdf_load_stackoverflow)
FR (1) FR1571471A (enrdf_load_stackoverflow)
GB (1) GB1203523A (enrdf_load_stackoverflow)
NL (1) NL151549B (enrdf_load_stackoverflow)
NO (1) NO122085B (enrdf_load_stackoverflow)
SE (1) SE352479B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710290A (en) * 1970-11-03 1973-01-09 Hartmann & Braun Ag Polarized electromagnetic relay
US3953814A (en) * 1974-09-21 1976-04-27 Hartmann & Braun Aktiengesellschaft Polarized electro-magnetic relay
US4041425A (en) * 1975-06-18 1977-08-09 Gte Automatic Electric Laboratories Incorporated Miniature low profile relay
US4596971A (en) * 1984-07-26 1986-06-24 Tdk Corporation Magnetic circuit device
US4851800A (en) * 1986-10-06 1989-07-25 Peterson Richard H Electrical stop control for musical instruments and action magnet therefor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1902610B1 (de) * 1969-01-20 1969-12-11 Sauer, Hans, 8000 München Elektromagnetisches Relais
JPS5188363U (enrdf_load_stackoverflow) * 1975-01-10 1976-07-15
ATA126182A (de) * 1982-03-30 1987-06-15 Schrack Elektronik Ag Elektromagnetisches relais
JPS5969772U (ja) * 1982-10-30 1984-05-11 積水化学工業株式会社 球技用敷物
GB2166595B (en) * 1984-11-07 1988-06-08 Stc Plc Polarised relay of high sensitivity
AT388467B (de) * 1987-08-27 1989-06-26 Schrack Elektronik Ag Relaisantrieb fuer ein polarisiertes relais
DE4034485A1 (de) * 1990-10-30 1992-05-07 Ernst H Grundmann Niederspannungsschaltgeraet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345490A (en) * 1942-11-05 1944-03-28 Union Switch & Signal Co Electrical relay
US2352948A (en) * 1943-04-02 1944-07-04 Gen Electric Electromagnetic device
US2728880A (en) * 1954-06-10 1955-12-27 Westinghouse Air Brake Co Electrical relays
US2869050A (en) * 1952-01-04 1959-01-13 Magnetic circuits

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE887540C (de) * 1940-03-09 1953-08-24 Siemens Ag Elektromagnetisches Relais mit permanentem Hilfsmagneten
US3069602A (en) * 1959-05-28 1962-12-18 Glenn M Stout Magnetic device
DE1439210A1 (de) * 1963-01-29 1969-01-09 Siemens Ag Elektromagnet mit beweglichem Anker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345490A (en) * 1942-11-05 1944-03-28 Union Switch & Signal Co Electrical relay
US2352948A (en) * 1943-04-02 1944-07-04 Gen Electric Electromagnetic device
US2869050A (en) * 1952-01-04 1959-01-13 Magnetic circuits
US2728880A (en) * 1954-06-10 1955-12-27 Westinghouse Air Brake Co Electrical relays

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710290A (en) * 1970-11-03 1973-01-09 Hartmann & Braun Ag Polarized electromagnetic relay
US3953814A (en) * 1974-09-21 1976-04-27 Hartmann & Braun Aktiengesellschaft Polarized electro-magnetic relay
US4041425A (en) * 1975-06-18 1977-08-09 Gte Automatic Electric Laboratories Incorporated Miniature low profile relay
US4596971A (en) * 1984-07-26 1986-06-24 Tdk Corporation Magnetic circuit device
US4851800A (en) * 1986-10-06 1989-07-25 Peterson Richard H Electrical stop control for musical instruments and action magnet therefor

Also Published As

Publication number Publication date
AT289935B (de) 1971-05-10
DE1614516B1 (de) 1971-12-30
NL151549B (nl) 1976-11-15
NO122085B (enrdf_load_stackoverflow) 1971-05-18
CH470749A (de) 1969-03-31
BE714289A (enrdf_load_stackoverflow) 1968-10-28
JPS4833473B1 (enrdf_load_stackoverflow) 1973-10-15
FR1571471A (enrdf_load_stackoverflow) 1969-06-20
NL6805894A (enrdf_load_stackoverflow) 1968-10-28
DK126457B (da) 1973-07-16
SE352479B (enrdf_load_stackoverflow) 1972-12-27
ES352092A1 (es) 1969-07-01
GB1203523A (en) 1970-08-26

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