US3805200A - Electromagnetic switch device - Google Patents

Electromagnetic switch device Download PDF

Info

Publication number
US3805200A
US3805200A US00271888A US27188872A US3805200A US 3805200 A US3805200 A US 3805200A US 00271888 A US00271888 A US 00271888A US 27188872 A US27188872 A US 27188872A US 3805200 A US3805200 A US 3805200A
Authority
US
United States
Prior art keywords
contact
arc
main
recess
main contact
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
US00271888A
Other languages
English (en)
Inventor
M Suzuki
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.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika Co Ltd
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
Application filed by Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Application granted granted Critical
Publication of US3805200A publication Critical patent/US3805200A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/648—Driving arrangements between movable part of magnetic circuit and contact intermediate part being rigidly combined with armature

Definitions

  • the switch is provided with an arc-cutting contact in either one of the movable and fixed main contacts, the arc-cutting contact being 'retractively protruded outwardly beyond the contacting surface of the main contact in which it is provided, so that the arc-cutting contact comes into contact with .the opposing maincontact prior to the engagement of the main contacts, through which the switch is brought into on-operation, while the arc-cutting contact comes out of contact with the opposing main contact after disengagement of the maincontacts by which the switch is brought into off-operation.
  • This invention relates to an electromagnetic switch device, and more particularly to an improved electromagnetic switch device whereby burning losses due to THE OBJECT OF THE INVENTION It is a primary object of the present invention to provide an electromagnetic switch device whereby generation of arcs between the contacts is remarkably reduced.
  • an electromagnetic switch device comprising a base plate member; an electromagnet securely mounted on said base plate member by means of a conductive bracket-and including a coil winding and a fixed ironcore inserted in the coil winding along the longitudinal axis thereof; a movable arm member pivotally mounted on said conductive bracket, adapted to be attracted by saidiron core upon energization of the coil and pro vided with an extension connected to the fore end portion thereof; said movable arm member being normally biased away from the iron core by means of a spring; a movable main contact provided in the fore end portion of said extension; a fixed main contact provided on a conductive bracket securely mounted on the base for engagement with said movable main contact; a retractable arc-cutting contact provided in either one of the movable andfixed main contacts and being.
  • the arc-cutting contact mentioned above has a head of convex shape and the opposing main contact has a recess of concave configuration to snugly fit with thehead of the arc-cutting contact.
  • FIG. 1 is a partially sectioned side elevationof the electromagnetic switch device according'to the present i invention
  • FIG. 2 is a fragmentary vertical cross-section, on an enlarged scale, of the main and arc-cutting contacts of the present invention showing the main contacts in a slightly opened position;
  • FIG. 3 is a view similar to FIG. 2, but showing the main contacts in a closed position.
  • the'reference'numeral 1 designates an electromagnet securely mounted on a base plate member and having a fixed iron core 3 inserted in a coil winding 2 along the longitudinal axis thereof.
  • an arm member movably mounted on a bracket 5 of a conductive material for pivotal movement toward and away from the fixed iron core 3 of the electromagnet l.
  • the movable arm member 4 is normally urged away from the iron core Sby means of a tension spring 6 which is connected at one end thereof to the rear end of the movable arm member 4 and at the other end to a flange provided on the conductive bracket 5.
  • the movablearm member-4 is further provided with 'an extension strip member 7 having a movable main contact 8 at the fore end portion thereof.
  • the movable main contact 8 has a recess or bore 9 in the central portion thereof for receiving a regagement with the arc-cutting contact 11 ..A through hole 15 is formed in the-fixed contactlZand communicateswith the central portion of the recessed concave contact surface 14.
  • the arc-cutting contact 11 which is normally held in the protruded position by the spring may be alternatively provided'on the side of the fixed contact 12, In such a case, the same onand off-operation may be effected as described hereinabove.
  • the recessed contact surface 14 may be covered with an arc-resistant metal chip.
  • the are discharge is generally produced in an increased amount at the time of openingof the switch than at the time of closing of the same. According to the present invention, when the movable main contact 8 is disengaged from the fixed contact 12, the arecutting contact 11 is still in contact with the concave contact surface 14 allowing the current to flow therethrough. Therefore, no arc is produced at this stage.
  • this material easily lends itself to the burning loss due to an arc discharge and therefore is usually used in the form of an alloy added with W, Cu, Cd and the like.
  • Such alloy has a disadvantage that it is oxidized by the arc and produces heat due to increased contact resistance.
  • With the switch construction of the present invention are is produced in a slight amount only at the arc-cutting contact 11, so that it is possible to form only the arc-cutting contact 11 by an arc resistant metal and the others by silver to obtain improved contacts with remarkably reduced burning losses, oxidation and heat generation. and with increased durability.
  • the arc-cutting contact maybe provided either on a side of the movable contact 8 or fixed contact 12 and is normally held in a protruded position by means of a spring, so that the arc-cutting contact 11 invariably comes into contact-with one of the opposed main contacts prior to the engagement thereof at a time of the on-operation of the switch and comes out of contact with the one of the opposing main contacts after disengagement thereof at a time of off-operation of the switch.
  • the electromagnetic switch of thepresent invention may be easily inserted into various kinds of circuits
  • the present electromagnetic switch further has an advantage of durability suf ficient for opening and closing operation of large amount of current.
  • An electromagnetic switch device comprising a base plate member; an electromagnet securely mounted on said base plate member by means of a conductive bracket and including a coil winding and a fixed iron core inserted in the coil winding along the longitudinal axis thereof; a movable'arm member pivotally mounted on said conductive bracket, adapted to be attracted by said iron core upon energization of the coil and provided with an extension connected to the fore end portion thereof; said movable arm member being normally biased away from the iron core by means of a spring; a movable main contact providedin the fore end portion of said extension; a fixed main contact provided on a conductive bracket securely mounted on the base for engagement with said movable main contact; a retractable arc-cutting contact provided on one of the main contacts and being normally protruded outwardly beyond the contacting surface of the one main contact in which it is provided by means of a spring, so that the arc-cutting contact comes into contact with the other main contact
  • An electromagnetic switch device wherein said other main contact has a through hole formed therein, one end of said hole communicating with the central portion of said recess so that oxidized metal particles formed as a result of arcing may pass through said hole to maintain the contacting surface of said recess clean.
  • An electromagnetic switch device comprising base means, electromagnetic means mounted on said base means and including a core; i conductive arm means disposed adjacent said electromagnetic means, and means mounting said conductive arm means for movement relative to said electromagnetic means between a first position wherein said arm means is attracted to said core and a second position wherein said arm means is conductive arm contacting surface, an arc-cutting contact slidably disposed'within said recess, and spring means disposed within said recess for normally urging said arc-cutting contact so that at least a portion thereof protrudes outwardly of said recess beyond the respective contacting surface, theprotruding portion of said arc-cutting contact having a substantially convex external configuration;
  • the other main contact having a concave recess formed therein and communicating with the respective contacting surface of said other main contact, said recess being disposed opposite the protruding portion of said arc-cutting contact so as to receive said protruding portion therein as said main contacts are relatively moved toward one another, said other main contact further having a through hole formed therein with one end of the through hole communicating with the central portion of said recess, whereby oxidized particles caused by arcing pass through said hole; whereby movement of said maincontacts toward one another causes the protruding portion of said arccutting contact to engage the surface defining said recess before said contacting surfaces engage one another, and whereby the protruding portion remains in engagement with the surface defining said recess after the opposed contacting surfaces have been moved out of engagement with one another.
  • said first and second main contacts each comprise blocklike members, said recess and said through hole as formed in said other main contact being disposed in the central portion of said blocklike member so that said recess is disposed near the center of the respective contacting surface, and wherein the recess as formed in said one main contact is also positioned centrally thereof and communicates with the respective contacting surface substantially in the center thereof.
  • a switch device wherein said one main contact is disposed above said other main contact, and said through hole as formed in said other main contact extending substantially vertically so that the oxide particles caused by arcing freely fall through said hole.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US00271888A 1971-07-16 1972-07-14 Electromagnetic switch device Expired - Lifetime US3805200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971063348U JPS4821138U (en]) 1971-07-16 1971-07-16

Publications (1)

Publication Number Publication Date
US3805200A true US3805200A (en) 1974-04-16

Family

ID=27954393

Family Applications (1)

Application Number Title Priority Date Filing Date
US00271888A Expired - Lifetime US3805200A (en) 1971-07-16 1972-07-14 Electromagnetic switch device

Country Status (2)

Country Link
US (1) US3805200A (en])
JP (1) JPS4821138U (en])

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000480A (en) * 1975-03-31 1976-12-28 Bell Telephone Laboratories, Incorporated Switching device
DE2930830A1 (de) * 1979-07-30 1981-02-05 Siemens Ag Mehrpoliger hochspannungs-lastschalter
US4544811A (en) * 1984-06-08 1985-10-01 Methode Electronics, Inc. Electric switch
US5525769A (en) * 1994-05-16 1996-06-11 General Electric Company Inverter cut-out switch
US6031194A (en) * 1995-12-28 2000-02-29 Kabushiki Kaisha Tokai Rika Denki Seisakusho Slide switch with self cleaning structure including grooves in rectangular substrate
US20140091059A1 (en) * 2012-09-28 2014-04-03 Arc Suppression Technologies Arc suppressor, system, and method
US20220293375A1 (en) * 2021-03-15 2022-09-15 Omron Corporation Electromagnetic relay

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0243076Y2 (en]) * 1985-10-24 1990-11-16

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445588A (en) * 1944-07-11 1948-07-20 Gen Electric Electrical switchgear
US2499420A (en) * 1946-02-19 1950-03-07 Michael J Sakatos Nonsparking switch
US3032627A (en) * 1959-03-05 1962-05-01 System Analyzer Corp Electrical switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445588A (en) * 1944-07-11 1948-07-20 Gen Electric Electrical switchgear
US2499420A (en) * 1946-02-19 1950-03-07 Michael J Sakatos Nonsparking switch
US3032627A (en) * 1959-03-05 1962-05-01 System Analyzer Corp Electrical switch

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000480A (en) * 1975-03-31 1976-12-28 Bell Telephone Laboratories, Incorporated Switching device
DE2930830A1 (de) * 1979-07-30 1981-02-05 Siemens Ag Mehrpoliger hochspannungs-lastschalter
US4544811A (en) * 1984-06-08 1985-10-01 Methode Electronics, Inc. Electric switch
US5525769A (en) * 1994-05-16 1996-06-11 General Electric Company Inverter cut-out switch
US6031194A (en) * 1995-12-28 2000-02-29 Kabushiki Kaisha Tokai Rika Denki Seisakusho Slide switch with self cleaning structure including grooves in rectangular substrate
US20140091059A1 (en) * 2012-09-28 2014-04-03 Arc Suppression Technologies Arc suppressor, system, and method
US20140091061A1 (en) * 2012-09-28 2014-04-03 Arc Suppression Technologies Arc suppression system and method
US9423442B2 (en) * 2012-09-28 2016-08-23 Arc Suppression Technologies Arc suppressor, system, and method
US9847185B2 (en) 2012-09-28 2017-12-19 Arc Suppression Technologies ARC suppressor, system, and method
US10566150B2 (en) 2012-09-28 2020-02-18 Arc Suppression Technologies Arc suppressor, system, and method
US10964492B2 (en) 2012-09-28 2021-03-30 Arc Suppression Technologies Arc suppressor, system, and method
US20220293375A1 (en) * 2021-03-15 2022-09-15 Omron Corporation Electromagnetic relay
US11990300B2 (en) * 2021-03-15 2024-05-21 Omron Corporation Electromagnetic relay

Also Published As

Publication number Publication date
JPS4821138U (en]) 1973-03-10

Similar Documents

Publication Publication Date Title
US3272949A (en) Bifurcated parallel contacts for relay
US3805200A (en) Electromagnetic switch device
JPS5882419A (ja) 三相負荷用開閉器具
CA1203275A (en) Electromagnetic relay
WO2018095417A1 (zh) 一种静簧与线圈架之间的插装结构
US3599133A (en) Latch relay motor structure
US4868529A (en) Circuit breaker armature latch with control leg
US3284743A (en) Magnetic switching device
CA1109906A (en) Magnetic latch device for a clapper type contactor
US3818392A (en) Ampere rated reed switch
US4078220A (en) Contactor having means to inhibit contact welding caused by jamming of the armature
CN217933635U (zh) 抗短路结构及继电器
US3356974A (en) Reed switch having an atmosphere to prevent sticking of the pole pieces therein
JP2959216B2 (ja) スイッチ用接点
US3088011A (en) Solenoid-type electromagnetic relays
US5173675A (en) Mounting for an electromagnetic relay armature
JP2988761B2 (ja) 開閉器
JPS59175529A (ja) 電磁接触器
JPS61232523A (ja) 接点開閉装置
JPH0787060B2 (ja) 電力開閉器
JPH0447925B2 (en])
JPS5810340A (ja) リレ−
US3001047A (en) Electromagnetic relay
JPS6356664B2 (en])
JPS6359484B2 (en])