US2426253A - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
US2426253A
US2426253A US495447A US49544743A US2426253A US 2426253 A US2426253 A US 2426253A US 495447 A US495447 A US 495447A US 49544743 A US49544743 A US 49544743A US 2426253 A US2426253 A US 2426253A
Authority
US
United States
Prior art keywords
armature
knife edge
yoke
washer
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
US495447A
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English (en)
Inventor
Towner Stanley Herbert
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US2426253A publication Critical patent/US2426253A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/24—Parts rotatable or rockable outside coil
    • H01H50/26—Parts movable about a knife edge

Definitions

  • the object of the present invention is to provide means whereby the armature is held in position with just suilicient freedom of movement for satisfactory operation independent of manufacturing tolerances.
  • Fig. 1 shows the relevant part of a relay
  • Fig. 2 shows its modification in accordance with one embodiment of the present invention
  • Fig. 2a shows one form of an adjustable nut for the relay
  • Fig. 3 shows its modification in accordance with another embodiment of the present invention.
  • the armature I l is pivotally support on a. knife edge at the forward end of the yoke 2.
  • Two armature studs l3 engage operating pins H to operate. the contact springs sets IS.
  • the armature II is held in place by a washer it acted upon by a spring ll encircling a retaining screw it.
  • the failures referred to above may in many cases be due to a twisting of the armature ll about one point in its knife edge, with the result that one of the operating plus it slips off its armature stud l3 and rides directly on the surface of the armature.
  • the present invention reduces the frequency of failure by an armature retaining means which confines the movement of the armature to a pivotal movement about the knife edge.
  • the armature retaining screw is replaced by a stud 19 secured in the yoke 12 at the required angle and passing through the armature hole.
  • the outer portion of the stud is threaded and carries an adjustable self-locking nut 20 which is tightened to give the required armature freedom, 1. e., to within .010" of the .surface of the armature when the latter is held against the knife edge.
  • the stud I! may be secured in a threaded hole in the yoke, the end 2
  • the stud I! should have a smooth surface as at 22 (not threaded) and may have circular, hexagonal or other cross section as required to provide adequate location and facilitate-assembly.
  • the adjustable nut may be of the form shown in Fig. 2a, or other forms provided with some means of locking may be used.
  • armature screw and spring of Fig. 1 are replaced by a shouldered screw 23 carrying a plain washer 24 and a compressible washer 25 which assumes the required thickness as the screw 23 is tightened in the yoke.
  • the required freedom of movement of the armature is obtained by placing a suitable gauge between the armature H and the flat washer 24 durin assembly.
  • the compressible washer 25 may take the form of a cupped washer of brass or copper which is sufficiently flexible to be distorted by the pressure of the screw when tightened in the normal manner and sufficiently rigid to withstand handling vibration. The maximum possible distortion must exceed the total variation in dimensions of armature, yoke, screw and washer along the axis of the screw. v
  • a relay of the type in which the armature is supported on a knife edge on the yoke comprising in combination with a yoke providing a knife edge bearing and an armature formed to provide a co-operating bearing groove in the inner surface of its bend and provided with an opening therethrough, of retaining means for the armature consisting of a connecting member engaging the yoke to pass freely through the armature opening, said member substantially intersecting said knife edge a non-resilient stop element on the projecting end of the connecting member adapted for positioning at a distance from said knife edge such that said armature is restricted to 8- 9 otal movement about said knife edge.
  • stop element comprises a plain washer engaging the armature outer surface and a compressible washer outwardly of the plain washer in engagement therewith, the latter of which is compressed to adjust properly the distance between said knife edge and said stop element.
  • An electromagnetic relay including yoke and armature members, one 01' said members having a knife edge for engaging the other to permit relative oscillating movement therebetween about said knife edge, a guide element in engagement with one of said members and extending through an opening in the other, said element substantially intersecting said knife edge, a, non-resilient stop member associated with said guide element, said stop member being adjustable to fix the distance between said stop member and said knife edge such that said other member is restricted to a pivotal movement about said knife edge.
  • An electromagnetic relay including a yoke having a knife edge, an armature supported on said knife edge, a stud bolt extending through aligned openings in said armature and knife edge, said stud bolt having a lower threaded portion secured to said yoke, a middle non-threaded portion passing through the armature opening and an upper threaded portion above the armature, and a self-locking nut threaded on said upper portion, the distance between said knife edge and the upper limit of said non-threaded portion being selected such that when said nut is moved to said upper limit, the armature is restricted to a pivotal movement about said knife edge.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US495447A 1942-08-18 1943-07-20 Electromagnetic relay Expired - Lifetime US2426253A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11581/42A GB559690A (en) 1942-08-18 1942-08-18 Improvements in or relating to electromagnetic relays

Publications (1)

Publication Number Publication Date
US2426253A true US2426253A (en) 1947-08-26

Family

ID=9988857

Family Applications (1)

Application Number Title Priority Date Filing Date
US495447A Expired - Lifetime US2426253A (en) 1942-08-18 1943-07-20 Electromagnetic relay

Country Status (4)

Country Link
US (1) US2426253A (en(2012))
BE (1) BE476271A (en(2012))
FR (1) FR932707A (en(2012))
GB (1) GB559690A (en(2012))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509724A (en) * 1946-09-06 1950-05-30 Cibie Pierre Adjustable spring pivot for relay armatures
US2574549A (en) * 1948-07-22 1951-11-13 Stromberg Carlson Co Electrical relay
US2585684A (en) * 1947-10-11 1952-02-12 Remington Rand Inc High-speed sensitive relay
US2662135A (en) * 1948-07-28 1953-12-08 Autocall Company Plug-in relay
US2686850A (en) * 1950-10-26 1954-08-17 Itt General purpose relay

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1155537B (de) * 1961-01-23 1963-10-10 Hamburger Elektrobau Dipl Ing Schneidankerlagerung fuer Relais
EP1962319B1 (de) * 2007-02-23 2012-03-14 Siemens Aktiengesellschaft Elektromagnetisches Schaltgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB355667A (en) * 1930-05-21 1931-08-21 Fuld & Co Telephon Improvements in electromagnetic relays
GB358070A (en) * 1930-05-05 1931-10-05 Frederick Ivor Ray Improvements in or relating to electric relays
AU457631A (en) * 1931-10-19 1932-06-30 Ivor Ray. Alan William Biddiscombe Frederick Improvements in or relating to electric relays
GB465133A (en) * 1935-11-01 1937-05-03 Standard Telephones Cables Ltd Improvements in or relating to guards for the contacts of electromagnetic relays such as are used in telephone systems
CH190826A (de) * 1936-01-28 1937-05-15 Autophon Ag Relais mit kapazitätsarmen Kontaktfedersätzen.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB358070A (en) * 1930-05-05 1931-10-05 Frederick Ivor Ray Improvements in or relating to electric relays
GB355667A (en) * 1930-05-21 1931-08-21 Fuld & Co Telephon Improvements in electromagnetic relays
AU457631A (en) * 1931-10-19 1932-06-30 Ivor Ray. Alan William Biddiscombe Frederick Improvements in or relating to electric relays
GB465133A (en) * 1935-11-01 1937-05-03 Standard Telephones Cables Ltd Improvements in or relating to guards for the contacts of electromagnetic relays such as are used in telephone systems
CH190826A (de) * 1936-01-28 1937-05-15 Autophon Ag Relais mit kapazitätsarmen Kontaktfedersätzen.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509724A (en) * 1946-09-06 1950-05-30 Cibie Pierre Adjustable spring pivot for relay armatures
US2585684A (en) * 1947-10-11 1952-02-12 Remington Rand Inc High-speed sensitive relay
US2574549A (en) * 1948-07-22 1951-11-13 Stromberg Carlson Co Electrical relay
US2662135A (en) * 1948-07-28 1953-12-08 Autocall Company Plug-in relay
US2686850A (en) * 1950-10-26 1954-08-17 Itt General purpose relay

Also Published As

Publication number Publication date
FR932707A (fr) 1948-03-31
BE476271A (en(2012))
GB559690A (en) 1944-03-01

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