US3763448A - Electromagnetic relays - Google Patents

Electromagnetic relays Download PDF

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Publication number
US3763448A
US3763448A US00239187A US3763448DA US3763448A US 3763448 A US3763448 A US 3763448A US 00239187 A US00239187 A US 00239187A US 3763448D A US3763448D A US 3763448DA US 3763448 A US3763448 A US 3763448A
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United States
Prior art keywords
base plate
electromagnetic relay
coil
recited
core
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Expired - Lifetime
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US00239187A
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English (en)
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J Walters
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings

Definitions

  • Atlarneyl (urt Kelman [30] Foreign Application Priority Data Apr. 2, 1971 Great Britain..........,... 8,579/71 [52] US. 335/135, 335/199, 335/266 formed y a number of independent l m
  • the relay is also provided with movable contact units which [51] Int. Cl. 01h 47/04 includes a number of contact sets. Each contact set having at least one pair of contact arms namely a mov- 66 26 1 0 0 2 s 3 1 5 1 39 39 1 m7 "0 1 "5 "3 3 h c r a e S t o d l e .1 F l 00 5 able contact arm and a fixed contact arm.
  • a removable rest plate for the contact arms is provided in order that the contact arms of each contact set may make or break in a predetermined sequence.
  • the present invention relates to electromagnetic relays.
  • Electromagnetic relays comprising an inner magnetic core housed in an outer coil, or coils and a movable contact unit disposed at one end of the core.
  • the movable contact unit includes a set of contacts and a movable armature.
  • electro-magnetic relays are produced with great variety of coil windings. Basically, the number of turns of the windings forming each coil and the electrical resistance of each coil and the number of coils per relay may be varied. It will be appreciated that varying the number of turns on each coil, the electrical resistance of each coil or alternatively the number of coils per relay will vary the characteristics of the electromagnetic relay.
  • an electromagnetic relay comprising an inner magnetic core housed in an outer coil, a movable contact unit disposed at one end of the armature, the outer coil being a modular coil formed by a plurality of independent coil modules and electrical connection means being provided to electrically connect individual coil mod ules together, and/or to other electrical elements and- /or to an electrical power source.
  • the electrical connection means of the printed circuit board and the movable contact unit includes a lift plate and has associated with it at least one contact set, each contact set comprising at least one pair of contact arms namely a movable contact arm and a fixed contact arm both secured relative to the outer coil, whereby in use, on operation of the electrical magnetic relay the lift plate is moved to cause the movable contact arms of each contact set to make or break their contact with the co- I operating fixed contact arm.
  • the main advantage of the present invention is that where a relatively small number of electromagnetic relays, having certain predetermined characteristics, are required these may be provided without excessive cost or difficulty.
  • FIG. 1 is an exploded perspective view of an electromagnetic relay according to the invention
  • FIG. 2 is a lefthand side view of the electromagnetic relay of FIG. 1,
  • FIG. 3 is a righthand side view of the electromagnetic relay
  • FIG. 4 is a bottom view of the relay
  • FIG. 5 is a side view of the relay
  • FIG. 6 is a top view of the relay
  • FIG. 7 is a perspective view of a coil module forming part of the relay, 7
  • FIG. 8 is a fragmentary perspective view of portion of an alternative construction of relay
  • FIG. 9 is an end view of portion of the alternative construction of relay.
  • FIG. 10 is a typical cross-sectional view of the portion of the relay illustrated in FIG. 9.
  • a relay having a base plate 1 which incorporates an integral upstanding support 2.
  • An outer coil indicated generally by the reference numeral 3 is provided; the outer coil 3 is a modular coil formed by a plurality of independent coil modules 4.
  • Each coil module 4 is a conventionally wound coil and is provided with an end plate 5 on which are mounted a pair of input terminals 6.
  • the coil modules 4 are mounted on the support 2 by means of an inner magnetic core 7.
  • One end of the core 7 forms a retaining collar 8 and the other end is formed into a threaded shaft 9 shown by the interrupted lines in FIG. 5.
  • a cylindrical nut 10 of conventional construction engages the shaft 9 and secures the core 7 to the support 2.
  • a movable contact unit indicated generally by the reference numeral lll comprises an armature 15, formed from a length of plate bent intermediate its ends and mounted by means of a bolt 12, washer l3 and spring 14 on the base plate 1.
  • the armature 15 has mounted on it a lift plate 16, on one of its free legs 15a, the other free leg 15b in use, engages the core 7.
  • the insulated block 19 is in turn mounted by means of a spring clip 20, of conventional construction.
  • the block 19 is in fact formed from a plurality of sheets of insulation material.
  • a spring steel retaining plate 21 is mounted in the block I9 and engages the lift plate 16.
  • the movable contact arms 17 are urged against the lift plate 16 while the fixed contact arms 17 impinge against a rigid rest plate 22 mounted by means of a spring steel clip 23 between a pair of extension arms 24 mounted on the base plate 1. Movement of the armature 15 causes the lift plate 16 to be moved relative to the base plate 1. This movement of the lift plate 16 causes one of the pair of contact arms formed by a movable contact arm 17 and fixed contact arm 18 of each contact set to break and the other pair of contact arms to make.
  • a printed circuit board 26 is provided with a number of holes 27 and power input contacts 28.
  • the electrical connection between each hole 27 and each power input contact 28 is an etched contact strip 29.
  • Each hole 27 engages an input terminal 6 of a coil module 4. Accordingly, in the embodiment as shown in FIGS. 1 to 7 each coil module 4 is individually electrically connected to a pair of power input contacts 28.
  • rest plate 30 which is of stepped construction.
  • This construction of rest plate 30 allows the contact arms l7and 18 of each contact set to make or break in a predetermined sequence.
  • the spring steel clip 23 facilitates the removal of the rest plate 30 and its replacement by a rest plate 30 of a different construction.
  • the arrangement of removable rest plate may of course be used with electromagnetic relays which have a coil of conventional construction and not of modular construction as described above.
  • An electromagnetic relay which comprises in combination:
  • a movable contact unit mounted on the base plate and disposed adjacent one end of the core;
  • end plates disposed between adjacent coil modules, said end plates having projecting terminals in communication with an associated coil module;
  • electrical connection means adapted for electrically interconnecting the coil modules
  • H a printed circuit board disposed adjacent to the coils and relative the length of the magnetic axis and having electrical connections disposed for receiving said projecting terminals.
  • An electromagnetic relay as recited in claim 2 in which there are three coil modules, the printed circuit board electrically connects two of the coil modules together in series and then in parallel with the third coil module.
  • An electromagnetic relay as recited in claim 2 in which the base plate is provided with an upstanding support, and in which the core has a collar formed on one end and a threaded portion on its other end whereby the threaded portion engages the upstanding support and the core is cantilevered across the base plate.
  • an armature pivotally mounted intermediate its ends on the base plate to form two free legs, one free leg being located adjacent the end of the core for magnetic engagement with the core;
  • a rest plate mounted in the base plate adjacent the lift plate;
  • a contact set mounted on the base plate and having at least one movable contact arm which engages the lift plate and the same number of co-operating fixed contact arms which engage the rest plate.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US00239187A 1971-04-02 1972-03-29 Electromagnetic relays Expired - Lifetime US3763448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB857971 1971-04-02

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US3763448A true US3763448A (en) 1973-10-02

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US (1) US3763448A (enrdf_load_stackoverflow)
GB (1) GB1338648A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852645A (en) * 1973-07-23 1974-12-03 Porta Systems Corp Telephone relay repair kit with spaced contact boards
US4020435A (en) * 1974-10-28 1977-04-26 Danfoss A/S Hinged armature relay
US4377799A (en) * 1980-05-06 1983-03-22 S.A. Des Etablissements Staubli Control unit comprising electromagnets, particularly for actuating dobbies for weaving machines
US4533889A (en) * 1983-12-14 1985-08-06 Amf Incorporated Relays and method for mounting relays on printed circuit boards
US20070097602A1 (en) * 2005-10-31 2007-05-03 Philipp Zeitlberger Switchgear with a Switching Device and an Electronic Component as well as a Supplementary Electrical Circuit for the Switchgear
US20080106362A1 (en) * 2006-11-02 2008-05-08 Abb France Contactor with modular connection of the coil
CN103985607A (zh) * 2014-05-15 2014-08-13 宁波福特继电器有限公司 一种带推动机构的大功率电磁继电器
CN105161367A (zh) * 2015-07-29 2015-12-16 东莞市三友联众电器有限公司 一种模块式继电器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1763172A (en) * 1928-12-19 1930-06-10 Bell Telephone Labor Inc Electro-polarized relay
GB758688A (en) * 1953-04-07 1956-10-10 T S Skillman And Company Pty L Improvements in printed circuit arrangements
US2945107A (en) * 1957-12-12 1960-07-12 Westinghouse Air Brake Co Electrical relays
US2970200A (en) * 1957-05-06 1961-01-31 Time O Matic Company Contact pileup
US2980891A (en) * 1954-09-24 1961-04-18 Int Standard Electric Corp Electromagnetic impulse counter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1763172A (en) * 1928-12-19 1930-06-10 Bell Telephone Labor Inc Electro-polarized relay
GB758688A (en) * 1953-04-07 1956-10-10 T S Skillman And Company Pty L Improvements in printed circuit arrangements
US2980891A (en) * 1954-09-24 1961-04-18 Int Standard Electric Corp Electromagnetic impulse counter
US2970200A (en) * 1957-05-06 1961-01-31 Time O Matic Company Contact pileup
US2945107A (en) * 1957-12-12 1960-07-12 Westinghouse Air Brake Co Electrical relays

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852645A (en) * 1973-07-23 1974-12-03 Porta Systems Corp Telephone relay repair kit with spaced contact boards
US4020435A (en) * 1974-10-28 1977-04-26 Danfoss A/S Hinged armature relay
US4377799A (en) * 1980-05-06 1983-03-22 S.A. Des Etablissements Staubli Control unit comprising electromagnets, particularly for actuating dobbies for weaving machines
US4533889A (en) * 1983-12-14 1985-08-06 Amf Incorporated Relays and method for mounting relays on printed circuit boards
US20070097602A1 (en) * 2005-10-31 2007-05-03 Philipp Zeitlberger Switchgear with a Switching Device and an Electronic Component as well as a Supplementary Electrical Circuit for the Switchgear
US7522025B2 (en) * 2005-10-31 2009-04-21 Tyco Electronics Austria Gmbh Switchgear with a switching device and an electronic component as well as a supplementary electrical circuit for the switchgear
US20080106362A1 (en) * 2006-11-02 2008-05-08 Abb France Contactor with modular connection of the coil
US7679477B2 (en) * 2006-11-02 2010-03-16 Abb France Contactor with modular connection of the coil
CN103985607A (zh) * 2014-05-15 2014-08-13 宁波福特继电器有限公司 一种带推动机构的大功率电磁继电器
CN103985607B (zh) * 2014-05-15 2015-12-02 宁波福特继电器有限公司 一种带推动机构的大功率电磁继电器
CN105161367A (zh) * 2015-07-29 2015-12-16 东莞市三友联众电器有限公司 一种模块式继电器

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Publication number Publication date
GB1338648A (enrdf_load_stackoverflow) 1973-11-28

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