US2902565A - Electro-magnetic relay - Google Patents

Electro-magnetic relay Download PDF

Info

Publication number
US2902565A
US2902565A US638420A US63842057A US2902565A US 2902565 A US2902565 A US 2902565A US 638420 A US638420 A US 638420A US 63842057 A US63842057 A US 63842057A US 2902565 A US2902565 A US 2902565A
Authority
US
United States
Prior art keywords
armature
pole piece
core
winding
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
US638420A
Other languages
English (en)
Inventor
Angold Edward Barnabas
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.)
Plessey Co Ltd
Original Assignee
Plessey 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
Priority claimed from GB445556A external-priority patent/GB813123A/en
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Application granted granted Critical
Publication of US2902565A publication Critical patent/US2902565A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature

Definitions

  • This invention relates to electromagnetic relays and has for an object to provide an improved relay of the kind, hereinafter called the kind'specified, in which a substantially. fiat armature, extending longitudinally of the relay winding, is arranged between the relay winding and the contacts to be operated.
  • two pole pieces of a relay of'the kind specified extend inwardly from the two ends of the core of the relay winding, and the armature is 'pivotally movable about a transverse axis at or near its centre, one end of the armature extending at the innerside of one of the pole pieces, and its other end extending at the outer side of the other pole piece.
  • the polar moments exerted upon the armature by the magnetic attraction of the two poles act additively, and each passage of the flux between the stationary core :structure and the armature is utilised to contribute to the available contact-actuation force, so that the relay will develop a great actuation force in relation to its size.
  • the armature is provided with projecting pin elements;
  • a bridge member or structure, supported on the'inner'pole piece and extending across the pole piece at the outerside of the armature serves to support a'stack of contact-springs extending along the outerside of the core-and-armature assembly.
  • the stack of contact springs and the bridgepiece are secured by screw means extending through suitable apertures inthe armature, in the bridge member and in or between insulating'spacers separating thecontact blades, and each' side ofthe bridge member or structure has a projection extending to, and supported, preferably under slight elastic deformation load, against the inner surface of the other pole piece.
  • the pin elements may be of square or rectangular cross-section and rest in similarly shaped recesses to obtain low friction loss' and low cost ofmanufacture.
  • the projecting pin elements of the armature of the bridge and the recesses in the projections may be omitted.
  • a thin flexible sheet of non- Patented Sept. 1, 1959 ferromagnetic material is secured to the outer surface of the inner pole piece and to the inner surface of that part of the armature which faces the other pole piece. Pivotal movement of the armature is possible by flexing of this sheet round the edge of the inner pole piece. In order to reduce stress in the sheet, this edge is preferably rounded with a suitable radius.
  • the flexible sheet in addition to hingedly connecting the-armature to the inner pole piece, also locates it by preventing any movement in the plane of the armature.
  • the armature actuates the movable'contact springs by one or more actuating pins or cards co-operating with the outer surface of the armature at the outer side of the other pole piece, which extend through apertures in the said other pole piece and aligned apertures of at least two contact spring blades or dummy blades, while 'being supported by a shoulder or the like on the surface of the spring to be actuated.
  • Excessive inward movement of the stationary and/ or movable contact springs is preferably prevented by one or more spacer pins or cards guided similarly to the actuating pins or cards by aligned apertures in two springs or similar blades, said spacer pins having shoulders supported on opposed surfaces'of at least one movable contact spring and a relatively rigid blade extending between said contact spring and the core and armature assembly.
  • This relatively rigid blade may serve as a stationary contact blade.
  • Figures 1 and 2 are respectively a top plan view and a side elevation, partly in section, of one embodiment, and
  • Figure 3 is a side elevation of the armature and core assembly of the other embodiment.
  • the relay has a winding 5 surrounding a core 6 of magnetisable material one end of which is bent at right angles to form a shank 7, and the end of which is once more bent at right angles to form a pole piece 8 extending, at the outer side of the winding 5, substantially parallel to the core 6.
  • a contact stack generally referred to by reference numeral 9, is secured to the pole piece 8 by a screw 10, with the interposition of a bridge member 2, which is formed of nonmagnetic sheet metal blanked to appropriate shape and bent to an inverted U profile.
  • a second pole piece 13 constituted by a fiat piece of magnetisable material bent to approximate L shape, is secured with one of its limbs to the free end of the core 6, for example by riveting, while its other limb extends along the outer side of the winding 5, in a direction opposite to that of the pole piece 8, but at a slightly greater distance from the winding 5, for areason which will soon become apparent.
  • the flanges 2a of the bridge member 2 are extended beyond the inner end of the Web portion 21b to form support brackets 20 which engage the inner surface of the second pole piece 13, the construction being such that when the screw 10 is tightened, the ends of the support brackets 2c are-pressed against the inner surface of the pole piece 13 between the respective ends of the web portion 2b and the pole piece 13.
  • the support brackets 20 are each formed with an approximately rectangular cut-out 2d, and these cut-outs accommodate fulcrum pins 1b which project at opposite sides from a flat ferro-magnetic armature 1, which is thus pivotally supported on the bridge member -2-in such manner that one half of-the armature faces the outer surface of the pole piece 8, While the other half of the armature faces the inner surface of the other pole piece 13.
  • the contact stack 9 comprises a flexible contact blade 14 carrying a contact block 15 constituting the movable contact of the relay, and two fixed contact blades 16 and 17, respectively carrying the contact blocks 18 and 19, constituting the stationary contacts.
  • the inner fixed contact blade 16 is relatively rigid, while the outer fixed contact blade 17 is flexible similarly to the movable contact blade 14.
  • a resilient auxiliary or dummy blade 20 is also provided in the stack.
  • a spacer 4 having an abutment portion 4a against which the opposed surfaces of the fixed blades 16 and 17 are supported, serves to maintain the fixed contacts 18 and 19 at the requisite relative distance so that contact block 19 is clear of contact block 15 when the relay is in the illustrated, tie-energised position, in which contact block 15 rests against contact block 18 carried by the relatively rigid fixed blade 16.
  • the actuating card 3 extends through aligned slots in the blades 14 and 2t), and has a shoulder 3a which acts upon the underside of the blade 14, While its lower end 3b co-operates with the upper surface of the left-hand half of armature 1.
  • a second shoulder 30 of the actuating card 3 is supported against the lower side of the auxiliary blade 20, which blade provides a return force tending to restore the armature 1 to its illustrated inoperative position.
  • insulating discs 21 are interposed between the various contact springs clamped by means of the screw 10.
  • Figure 3 illustrates a modified armature-and-core assembly; this may be equipped with a contact stack, spacers, and actuating pins which are identical with those shown in Figures 1 and 2, and which have been omitted in the drawing to simplify the figure.
  • the pivotal connection between the armature 1 and the pole piece 8 which is integral with the core 6, is effected by means of a flexible sheet 11 of non-magnetic material which at one end is connected to the armature, for example by rivets 22, while the other end of the flexible sheet 11 is secured to the pole piece 8, for example by being clamped between the latter and the bridge member 12.
  • a second line of attachment of the sheet to the armature is preferably provided by rivets or screws 23 fixed in the armature 1, preferably with the interposition of a clamping bar 24 at the back of the sheet 11.
  • the bridge member 12 itself may be constructed similarly as illustrated in Figure 2, except that the recesses 2d provided in the bracket portions 20 of bridge member 2 are omitted in the bracket portions 120 of the bridge member 12.
  • An electromagnetic relay comprising in combination, a core, first and second pole pieces associated with the core, a free end portion to each pole piece, the free end portions being turned inwardly to overlie the core and to face towards each other, on the same side of the core,
  • a cradle-like bridging member blanked out from a single piece of non-magnetic material bridging the pole pieces, readily releasable means for securing the bridging member to one of the pole pieces so that the bridging member is held in contact with the other one of the pole pieces in such manner as to ensure accurate relative positioning of the pole pieces and an armature pivotally supported by the bridging member for balanced pivotal movement about a transverse axis, so that one end thereof is located between a pole piece and the core, and so that the other end co-operates with the remaining pole piece on the side thereof remote from the core.
  • An electromagnetic relay comprising in combination, a core, a winding on the core, first and second pole pieces magnetically connected with the core, an end portion of each pole piece being turned inwardly to overlie at least a part of the winding so that the end portions face towards each other on the same side of the core with a gap between the end portions, a blanked out channelled member bridging the gap, readily releasable means for securing the bridging member to one of the pole pieces so that the bridging member is held against the other pole piece in such manner as to ensure accurate relative positioning between the pole pieces, a set of contact springs supported by said bridging member and secured thereto by the means securing the bridging member to said one pole piece and an armature pivotally mounted on the bridging member to be swingable between the gap with one limb of the armature located between a pole piece and the winding and with the other end of the armature co-operating with that side of the remaining pole pieces which is remote from the winding.
  • An electromagnetic relay comprising in combination, a core, first and second pole pieces associated with the core, a free end portion to each pole piece, the free end portions being turned inwardly to overlie the core and to face towards each other on the same side of the core, in separated relationship, a member bridging the separation between the pole pieces, screw means for securing the bridging member to one of the pole pieces, a projection extending from each side of the bridging member, each projection extending to, and being supported against that surface of the other pole piece which is adjacent the winding so that when the bridging member is secured to the one pole piece slight elastic deformation is produced between the pole pieces, and an armature pivotally mounted on the bridging member to be swingable between the gap with one limb of the armature located between a pole piece and the winding and with the other end of the armature co-operating with that side of the remaining pole piece which is remote from the winding.
  • An electromagnetic relay comprising in combination, a core, a winding on the core, first and second pole pieces magnetically connected with the core, an end portion of each pole piece being turned inwardly to overlie at least a part of the winding so that the end portions face towards each other on the same side of the core with a gap between the portions, a member in the form of blanked fiat material bent to a U profile bridging the gap, means for securing the bridging member to one of the pole pieces so that the bridging member bears upon the other pole piece in such manner as to produce elastic deformation between the pole pieces, and an armature pivotally mounted on the bridging member to be swingable between the gap with one limb of the armature located between a pole piece and the winding and with the other end of the armature co-operating with that side of the remaining pole piece which is remote from the winding.
  • An electromagnetic relay comprising in combination, a core, a winding on the core, first and second pole pieces magnetically connected with the core, an end portion of each pole piece being turned inwardly to overlie at least a part of the winding so that the end portions face towards each other on the same side of the core with a gap between the end portions, a member, in the form of blanked flat material bent to a U profile and having a pressed stiifening ridge extending across the web of the U bridging the gap, means for securing the bridging member to one of the pole pieces so that the bridging member bears upon the other pole piece in such manner as to produce elastic deformation between the pole pieces and an armature pivotally mounted on the bridging member to be swingable between the gap with one limb of the armature located between a pole piece and the winding, and with the other end of the armature cooperating with that side of the remaining pole piece which is remote from the windmg.
  • An electromagnetic relay comprising in combination, a core, a winding on the core, first and second pole pieces magnetically connected with the core, an end portion of each pole piece being turned inwardly to overlie at least a part of the winding so that the end portions face towards each other on the same side of the core with a gap between the end portions, a channelled blankedout member bridging the gap, readily releasable means for securing the bridging member to one of the pole pieces so that the bridging member is held in contact with other pole piece in such manner as to ensure accurate relative positioning of the pole pieces, a set of contact springs supported by said bridging member and secured thereto by the means securing the bridging member to said one pole piece, an armature pivotally mounted on the bridging member to be swingable between the gap with one limb of the armature located between a pole piece and the winding and with the other end of the armature co-operating with that side of the remaining pole pieces which is remote from the winding, at
  • An electromagnetic relay comprising in combination, a core, a winding on the core, first and second pole pieces magnetically connected with the core, and an end portion of each pole piece being turned inwardly to overlie at least a part of the winding so that the end portions face towards each other on the same side of the core with a gap between the portions, a member in the form of blanked flat material bent to a U profile bridging the gap, readily releasable means for securing the bridging member to one of the pole pieces so that the bridging member bears upon the other pole piece in such manner as to produce elastic deformation between the pole pieces, an armature pivotally mounted on the bridging member to be swingable between the gap with one limb of the armature located between a pole piece and the winding and with the other end of the armature co-operating with that side of the remaining pole piece which is remote from the winding, and a set of contact springs supported by said bridging member and secured thereto by the means securing the bri

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US638420A 1956-02-13 1957-02-05 Electro-magnetic relay Expired - Lifetime US2902565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB445556A GB813123A (en) 1956-02-13 Electromagnetic relay

Publications (1)

Publication Number Publication Date
US2902565A true US2902565A (en) 1959-09-01

Family

ID=9777496

Family Applications (1)

Application Number Title Priority Date Filing Date
US638420A Expired - Lifetime US2902565A (en) 1956-02-13 1957-02-05 Electro-magnetic relay

Country Status (4)

Country Link
US (1) US2902565A (zh)
DE (1) DE1071230B (zh)
FR (1) FR1166274A (zh)
NL (2) NL214493A (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013136A (en) * 1959-02-12 1961-12-12 Fligue Wladimir De Electromagnetic relay
US3041422A (en) * 1959-09-09 1962-06-26 North Electric Co Relay
US3079479A (en) * 1959-01-02 1963-02-26 Heinemann Electric Co Circuit breaker
US3118033A (en) * 1961-11-15 1964-01-14 Hi G Inc Electromagnetic relay
US3138677A (en) * 1961-05-29 1964-06-23 Leach Corp Compact relay with angular pole pieces
US4772809A (en) * 1983-11-28 1988-09-20 Omron Tateisi Electronics Co. Switching circuit and a relay device employed to prevent arcing
US20170178850A1 (en) * 2014-09-10 2017-06-22 Tyco Electronics Ec Trutnov S.R.O. Yoke Assembly With Decelaration Element for Switching Device and Same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422986A (en) * 1944-05-10 1947-06-24 Gen Electric Time delay relay
US2455049A (en) * 1948-11-30 Shockpkoof electromagnetic
US2510157A (en) * 1943-07-07 1950-06-06 Int Standard Electric Corp Electromagnetic relay
US2664478A (en) * 1951-02-10 1953-12-29 Johansson Karl Lennart Electromagnetic relay
US2760026A (en) * 1951-01-08 1956-08-21 Clare & Co C P Relay

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455049A (en) * 1948-11-30 Shockpkoof electromagnetic
US2510157A (en) * 1943-07-07 1950-06-06 Int Standard Electric Corp Electromagnetic relay
US2422986A (en) * 1944-05-10 1947-06-24 Gen Electric Time delay relay
US2760026A (en) * 1951-01-08 1956-08-21 Clare & Co C P Relay
US2664478A (en) * 1951-02-10 1953-12-29 Johansson Karl Lennart Electromagnetic relay

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079479A (en) * 1959-01-02 1963-02-26 Heinemann Electric Co Circuit breaker
US3013136A (en) * 1959-02-12 1961-12-12 Fligue Wladimir De Electromagnetic relay
US3041422A (en) * 1959-09-09 1962-06-26 North Electric Co Relay
US3138677A (en) * 1961-05-29 1964-06-23 Leach Corp Compact relay with angular pole pieces
US3118033A (en) * 1961-11-15 1964-01-14 Hi G Inc Electromagnetic relay
US4772809A (en) * 1983-11-28 1988-09-20 Omron Tateisi Electronics Co. Switching circuit and a relay device employed to prevent arcing
US20170178850A1 (en) * 2014-09-10 2017-06-22 Tyco Electronics Ec Trutnov S.R.O. Yoke Assembly With Decelaration Element for Switching Device and Same
US10679813B2 (en) * 2014-09-10 2020-06-09 Tyco Electronics Ec Trutnov S.R.O. Yoke assembly with deceleration element for switching device and same

Also Published As

Publication number Publication date
NL214493A (zh)
NL105252C (zh)
DE1071230B (zh)
FR1166274A (fr) 1958-11-04

Similar Documents

Publication Publication Date Title
US2929899A (en) Contactor switch device
US2902565A (en) Electro-magnetic relay
US2266536A (en) Electric relay
US2896132A (en) Electromagnetic relay with spring loaded armature
US3340487A (en) Armature structure for an electromagnetic device
US3710290A (en) Polarized electromagnetic relay
US2946873A (en) Electromagnetic relays
US2342797A (en) Shading coil
US1921430A (en) Electromagnetic switching device
US2866927A (en) Permanent-magnet armature for polarized electromagnetic systems, in particular for polarized relays
US3368170A (en) Polarized electromagnetic relay
US3097328A (en) Electromagnetic relay
US3623150A (en) Contactor switch
US3461411A (en) Armature arrangement
US3061765A (en) Electrical relay armature assembly
US991829A (en) Electrical relay.
US3187141A (en) Armature mounting means for electromagnetic relays
US2283270A (en) Electrical relay
US3345592A (en) Electromagnetic relay with improved armature-core assembly
US928360A (en) Electrical relay.
US1904847A (en) Electromagnetic device
US2296431A (en) Electromagnetic relay structure
US1185370A (en) Relay.
US1541814A (en) Electromagnet contactor
US2089320A (en) Electromagnetic switching device