US3249822A - Electromagnetic relays - Google Patents

Electromagnetic relays Download PDF

Info

Publication number
US3249822A
US3249822A US267380A US26738063A US3249822A US 3249822 A US3249822 A US 3249822A US 267380 A US267380 A US 267380A US 26738063 A US26738063 A US 26738063A US 3249822 A US3249822 A US 3249822A
Authority
US
United States
Prior art keywords
relay
frame
armature
coil
arms
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
US267380A
Inventor
Summers Norman Derek
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 Overseas 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
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Application granted granted Critical
Publication of US3249822A publication Critical patent/US3249822A/en
Assigned to PLESSEY OVERSEAS LIMITED reassignment PLESSEY OVERSEAS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PLESSEY COMPANY LIMITED THE
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
    • H01H50/24—Parts rotatable or rockable outside coil

Definitions

  • the magnetic circuit of an electromagnetic relay includestwo substantially L-shaped members which engage with the frame or like element of the relay with corresponding arms of the members lying side by side to form a core for the coil of the relay and the remaining arms of the members being located one at each end of the coil and extending in the same direction to provide pole pieces with a relay armature.
  • each said other arm of the members are provided with means for lockably engaging with the frame so as to effectively lock the members to the frame in a predetermined position.
  • the free end of each said other arm is provided with a wedging surface which can loclewith a resilient catch provided on the frame.
  • the co-operation between the wedging surface and the catch serves positionally to locate the membet with respect to the frame, there being additional locating means in the form of a slot at each end of the frame which is engaged by the associated other arm.
  • the coil carrying bobbin or former of the relay is connected to the frame or like element of the relay by two substantially L-shaped members which form a core for the coil of the relay and which also form pole pieces to coact with a relay armature.
  • FIGURE 1 is a side and FIGURE 2 is a section along the line II--II on FIG- URE 1 looking in the direction shown.
  • FIGURE 3 shows the frame of the relay looking from one end. The position of a pole piece when inserted from this end is shown as a chain-dotted line.
  • FIGURE 4 is a section along the line IV--IV on FIG- URE 3 showing the position of one pole piece in the frame of the relay.
  • the relay has a main frame formed from a single piece of sheet metal such as brass, the frame having a rectangular body part 1, two support pieces 2 for a' coil bobbin 3, the support pieces extending perpendicularly from one pair of opposite edges of the body part and two leg units 4, extending perpendicularly from the other pair of opposite edges on the opposite side of the body part 1.
  • Each support piece 2 is constituted by a flat plate against which the end wall of the coil bobbin 3 abuts.
  • a vertical slot 5 is formed in each of the support pieces 2. One end of the slot 5 terminates at a rectangular hole 6, one side of the hole 6 being defined by the continuation of one side of the slot 5 so that the hole 6 is offset with respect to the slot 5.
  • each hole 6 in one support piece is opposite to that in the other support piece.
  • Each hole 6 is located substantially in the center of its support piece 2 and is of the same dimensions as the bore of the bobbin 3.
  • the other end of each slot 5 intersects the transition zone between thesupport piece 2 and the body part 1.
  • the body part 1 is so cut in the vicinity of the said other ends of the slots 5 as toprovide a resilient ice core of the relay.
  • This corev is constituted by one arm of each of twoL-shaped elements 8.
  • each element 8 enters into the hole in one support piece 2 with the other arm thereof engaged in the slot 5 ofthe support piece 2, passes through the bore of the bobbin 3 to'iritersect and project outwardly from the other support piece, with the projecting end of, the one arm engaging the oifset part of the hole 6.
  • One of these L-shaped elements 8 in position in a support piece 2 is shown as a chain-dotted line in FIGURE 3. Further detail is given in FIGURE 4. With this arrangement, after fitting the bobbin 3 between support pieces 2, the core elements are entered into the holes 6 from the opposite ends of the bobbin 3. The two long arms of the elements 8 lie side-by-side and substantially fill the holes 6 and the bore a of the bobbin 3. The other arms of the L-shaped elements engage the slots 5.
  • An inclined wedging surface 7a is formed on each one of the other arms of the L-shaped elements, thewedging surfaces being complementary to the inclined surface of the resilient tongues 7. Thesewedging surfaces 7a mutually interact to lock the core elements 8 in position after they have been fitted to the frame. Preferably the locking is reinforced by a soldering operation, which provides an additional connection between the frame and the core elements 8.
  • the other arms of the L-shaped elements act as pole faces which co-operate with an armature 9 of the relay.
  • the armature 9 is pivotally mounted on a pivot pin 10 provided on the body part 1 of the frame.
  • the pivot pin 10 is located at the intersection of the diagonals of the body part, and extends perpendicular to the body part between the leg units '4.
  • the pole faces are arranged in an off-set relationship with respect to the pivotal axis of the armature 9.
  • the armature 9 ' is arranged to pivot transversely of the pole pieces of the core elements 8.
  • the leg units 4 of the frame are connected to a rectangular base plate 11 which carries a number of spring contacts 12 mounted on pins 13 secured to the base plate with glass-to-metal seals.
  • the spring contacts 12 are arranged as two sets of change-over contacts. Each set comprises two V-shaped resilient contacts each having one end secured to a pin 13 and so arranged that the two springs combine to form an M configuration.
  • a flexible movable contact 12a is fixed by one end thereof to a further pin. The free end of one movable contact 12a co-acts with one end of the armature 9 to one side of the pivot axis, and the other movable contact co-acts with the other end of the armature to the other side of the armature.
  • the armature 9 swings clear of the contacts and is provided with an insulated abutment pin 14 at each end which pushes the movable contacts 12a andeffects the change over switching.
  • a spring (not shown) returns the armature to a restposition when a magnetic force causing movement of the armature and actuation of the relay is removed.
  • An electromagnetic relay including a coil, a relay armature, a frame and two substantially L-shaped memmembers lying side-by-side to form a core for the coil r of the relay and the remaining arms of the members being located one at each end of the coil, means supporting said remaining arms laterally in slots in the frame and said remaining arms extending in the same direction to provide pole pieces coacting with the relay armature, the armature being movable in a plane perpendicular to that in which the pole pieces lie.
  • An electromagnetic relay as claimed in claim 2 in which a free end of each of said remaining arms is provided with a wedging surface which can lock with a resilient catch provided on the frame.
  • An electromagnetic relay comprising a relay frame which supports a relay coil, an armature pivotally mounted within the frame, two substantially L-shaped members which engage with the frame with corresponding arms of the members lying side-by-side to form a core for the coil of the relay and the remaining arms of the members being located one at each end of the relay coil and extending in the same direction, locking means support ing each remaining arm in a slot in the relay frame and the end of, each remaining arm actingas a pole piece to coact with the relay armature, said locking means being provided between the remaining arms and frame effective to hold the arms to the frame in a predetermined position.
  • a relay according to claim 5, wherein the locking means between the remaining arms and frame includes a wedging surface on each remaining arm which co-operates with resilient catch means carried on the relay frame.

Description

May 3, 1966 N. D. SUMMERS 3,249,822
ELECTROMAGNETIC RELAYS Filed March 14, 1963 In "1-, For; Var-nan United States Patent- 3,249,822 ELECTROMAGNETIC RELAYS Norman Derek Summers, Fareham, England, a'ssignor to The Plessey Company Limited, Ilford, England, a British company Filed Mar. 14, 1963, Ser. No. 267,380 Claims priority, application Great Britain, Mar. 15, 1962,
7 Claims. (Cl. 317-165) This invention relates to electromagnetic .relays.
In accordance with a first aspect of the invention the magnetic circuit of an electromagnetic relay includestwo substantially L-shaped members which engage with the frame or like element of the relay with corresponding arms of the members lying side by side to form a core for the coil of the relay and the remaining arms of the members being located one at each end of the coil and extending in the same direction to provide pole pieces with a relay armature.
Preferably the said other arms of the members are provided with means for lockably engaging with the frame so as to effectively lock the members to the frame in a predetermined position. Conveniently the free end of each said other arm is provided with a wedging surface which can loclewith a resilient catch provided on the frame.
Preferably the co-operation between the wedging surface and the catch serves positionally to locate the membet with respect to the frame, there being additional locating means in the form of a slot at each end of the frame which is engaged by the associated other arm.
In accordance with a further aspect of the invention the coil carrying bobbin or former of the relay is connected to the frame or like element of the relay by two substantially L-shaped members which form a core for the coil of the relay and which also form pole pieces to coact with a relay armature.
The invention will be further described With reference to the accompanying drawings which show an example of an electromagnetic relay according to the invention.
FIGURE 1 is a side and FIGURE 2 is a section along the line II--II on FIG- URE 1 looking in the direction shown.
FIGURE 3 shows the frame of the relay looking from one end. The position of a pole piece when inserted from this end is shown as a chain-dotted line.
view of the electromagnetic relay,
FIGURE 4 is a section along the line IV--IV on FIG- URE 3 showing the position of one pole piece in the frame of the relay.
The relay has a main frame formed from a single piece of sheet metal such as brass, the frame having a rectangular body part 1, two support pieces 2 for a' coil bobbin 3, the support pieces extending perpendicularly from one pair of opposite edges of the body part and two leg units 4, extending perpendicularly from the other pair of opposite edges on the opposite side of the body part 1. Each support piece 2 is constituted by a flat plate against which the end wall of the coil bobbin 3 abuts. A vertical slot 5 is formed in each of the support pieces 2. One end of the slot 5 terminates at a rectangular hole 6, one side of the hole 6 being defined by the continuation of one side of the slot 5 so that the hole 6 is offset with respect to the slot 5. The off-setting of the hole 6 in one support piece is opposite to that in the other support piece. Each hole 6 is located substantially in the center of its support piece 2 and is of the same dimensions as the bore of the bobbin 3. The other end of each slot 5 intersects the transition zone between thesupport piece 2 and the body part 1. The body part 1 is so cut in the vicinity of the said other ends of the slots 5 as toprovide a resilient ice core of the relay. This corev is constituted by one arm of each of twoL-shaped elements 8. One arm of each element 8 enters into the hole in one support piece 2 with the other arm thereof engaged in the slot 5 ofthe support piece 2, passes through the bore of the bobbin 3 to'iritersect and project outwardly from the other support piece, with the projecting end of, the one arm engaging the oifset part of the hole 6. One of these L-shaped elements 8 in position in a support piece 2 is shown as a chain-dotted line in FIGURE 3. Further detail is given in FIGURE 4. With this arrangement, after fitting the bobbin 3 between support pieces 2, the core elements are entered into the holes 6 from the opposite ends of the bobbin 3. The two long arms of the elements 8 lie side-by-side and substantially fill the holes 6 and the bore a of the bobbin 3. The other arms of the L-shaped elements engage the slots 5.
An inclined wedging surface 7a is formed on each one of the other arms of the L-shaped elements, thewedging surfaces being complementary to the inclined surface of the resilient tongues 7. Thesewedging surfaces 7a mutually interact to lock the core elements 8 in position after they have been fitted to the frame. Preferably the locking is reinforced by a soldering operation, which provides an additional connection between the frame and the core elements 8.
The other arms of the L-shaped elements act as pole faces which co-operate with an armature 9 of the relay.
The armature 9 is pivotally mounted on a pivot pin 10 provided on the body part 1 of the frame. The pivot pin 10 is located at the intersection of the diagonals of the body part, and extends perpendicular to the body part between the leg units '4. The pole faces are arranged in an off-set relationship with respect to the pivotal axis of the armature 9.
The armature 9 'is arranged to pivot transversely of the pole pieces of the core elements 8.
The leg units 4 of the frame are connected to a rectangular base plate 11 which carries a number of spring contacts 12 mounted on pins 13 secured to the base plate with glass-to-metal seals. The spring contacts 12 are arranged as two sets of change-over contacts. Each set comprises two V-shaped resilient contacts each having one end secured to a pin 13 and so arranged that the two springs combine to form an M configuration. A flexible movable contact 12a is fixed by one end thereof to a further pin. The free end of one movable contact 12a co-acts with one end of the armature 9 to one side of the pivot axis, and the other movable contact co-acts with the other end of the armature to the other side of the armature.
The armature 9 swings clear of the contacts and is provided with an insulated abutment pin 14 at each end which pushes the movable contacts 12a andeffects the change over switching. A spring (not shown) returns the armature to a restposition when a magnetic force causing movement of the armature and actuation of the relay is removed. The foregoing description of a particular embodiment of the invention is given as an example only. A number of variations could be made which would still fall within the scope of the invention. For example, the core elements 8 could be fixed to the relay frame by means other than locking and soldering, such as welding or rivetting.
What we claim is: V
1. An electromagnetic relay including a coil, a relay armature, a frame and two substantially L-shaped memmembers lying side-by-side to form a core for the coil r of the relay and the remaining arms of the members being located one at each end of the coil, means supporting said remaining arms laterally in slots in the frame and said remaining arms extending in the same direction to provide pole pieces coacting with the relay armature, the armature being movable in a plane perpendicular to that in which the pole pieces lie.
2. An electromagnetic relay as claimed in claim 1 in which the said remaining arms of the members are provided with means for lockably engaging with the frame so as effectively to lock the members to the frame in a predetermined position.
3. An electromagnetic relay as claimed in claim 2 in which a free end of each of said remaining arms is provided with a wedging surface which can lock with a resilient catch provided on the frame.
4. An electromagnetic relay as claimed in claim 3 in which co-operation between the wedging surface and the catch serves positionally to locate the arm with respect to the frame.
5. An electromagnetic relay comprising a relay frame which supports a relay coil, an armature pivotally mounted within the frame, two substantially L-shaped members which engage with the frame with corresponding arms of the members lying side-by-side to form a core for the coil of the relay and the remaining arms of the members being located one at each end of the relay coil and extending in the same direction, locking means support ing each remaining arm in a slot in the relay frame and the end of, each remaining arm actingas a pole piece to coact with the relay armature, said locking means being provided between the remaining arms and frame effective to hold the arms to the frame in a predetermined position.
6. A relay according to claim 5, wherein the locking means between the remaining arms and frame includes a wedging surface on each remaining arm which co-operates with resilient catch means carried on the relay frame.
7. A relay according to claim 5, including a contact assembly supported on a base upon which the relay frame is mounted, the contact assembly including at least one resilient contact arm which may be engaged and moved by means of abutment pins carried on the relay armature.
References Cited by the Eiraminer UNITED STATES PATENTS Welch et a1. 317 197 X BERNARD A. GILHEANY, Primary Examiner.
JOHN F. BURNS, Examiner.
LARAMIE E. ASKIN, G. HARRIS, 1a.,
Assistant Examiners.

Claims (1)

1. AN ELECTROMAGNETIC RELAY INCLUDING A COIL, A RELAY ARMATURE, A FRAME AND TWO SUBSTANTIALLY L-SHAPED MEMBERS WHICH ENGAGE THE FRAME, CORRESPONDING ARMS OF THE MEMBERS LYING SIDE-BY-SIDE TO FORM A CORE FOR THE COIL OF THE RELAY AND THE REMAINING ARMS OF THE MEMBERS BEING LOCATED ONE AT EACH END OF THE COIL, MEANS SUPPORTING SAID REMAINING ARMS LATERALLY IN SLOTS IN THE FRAME AND SAID REMAINING ARMS EXTENDING IN THE SAME DIRECTION TO PROVIDE POLE PIECES COACTING WITH THE RELAY ARMATURE, THE ARMATURE BEING MOVABLE IN A PLANE PERPENDICULAR TO THAT IN WHICH THE POLE PIECES LIE.
US267380A 1962-03-15 1963-03-14 Electromagnetic relays Expired - Lifetime US3249822A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9972/62A GB1019895A (en) 1962-03-15 1962-03-15 Electromagnetic relays

Publications (1)

Publication Number Publication Date
US3249822A true US3249822A (en) 1966-05-03

Family

ID=9882170

Family Applications (1)

Application Number Title Priority Date Filing Date
US267380A Expired - Lifetime US3249822A (en) 1962-03-15 1963-03-14 Electromagnetic relays

Country Status (3)

Country Link
US (1) US3249822A (en)
DE (1) DE1219587B (en)
GB (1) GB1019895A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344375A (en) * 1965-09-13 1967-09-26 Ite Circuit Breaker Ltd Electromagnetic structure with low reluctance u-shaped pole means

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2454967C3 (en) * 1974-05-15 1981-12-24 Hans 8024 Deisenhofen Sauer Poled electromagnetic relay

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960583A (en) * 1958-04-30 1960-11-15 Sigma Instruments Inc Sensitive relay
US3005071A (en) * 1958-04-30 1961-10-17 Comar Electric Company Relay structure
US3013136A (en) * 1959-02-12 1961-12-12 Fligue Wladimir De Electromagnetic relay
US3098135A (en) * 1962-02-15 1963-07-16 Clare & Co C P Relay construction
US3147349A (en) * 1960-10-26 1964-09-01 Control Dynamics Corp Electromagnetic relay

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960583A (en) * 1958-04-30 1960-11-15 Sigma Instruments Inc Sensitive relay
US3005071A (en) * 1958-04-30 1961-10-17 Comar Electric Company Relay structure
US3013136A (en) * 1959-02-12 1961-12-12 Fligue Wladimir De Electromagnetic relay
US3147349A (en) * 1960-10-26 1964-09-01 Control Dynamics Corp Electromagnetic relay
US3098135A (en) * 1962-02-15 1963-07-16 Clare & Co C P Relay construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344375A (en) * 1965-09-13 1967-09-26 Ite Circuit Breaker Ltd Electromagnetic structure with low reluctance u-shaped pole means

Also Published As

Publication number Publication date
GB1019895A (en) 1966-02-09
DE1219587B (en) 1966-06-23

Similar Documents

Publication Publication Date Title
US2767279A (en) Electromagnetic relay
US3885115A (en) Switch-over contact
US2917600A (en) Electromagnetic relays
US3249822A (en) Electromagnetic relays
US2344809A (en) Electromagnetically operated switch
US3855558A (en) Electrical contact attachment
US3474367A (en) Relay motor
CA1224511A (en) Electromagnetic relay
US3051804A (en) Electromagnetic relays
US1503980A (en) Electromagnetically-operated device
US2946873A (en) Electromagnetic relays
US3283275A (en) Electromagnetic device having a resilient shading coil
US4025884A (en) Relay construction
US2975252A (en) Relay
US3493903A (en) Electromagnetic relay with a suspended armature
US3118033A (en) Electromagnetic relay
US3239727A (en) Electromagnetic switching device
US2827529A (en) Double pole electromagnetic switching device
US2406216A (en) Electromagnet
US3253095A (en) Electromagnetic relays
US3253096A (en) Miniature electromagnetic relay and mounting bracket arrangement therefor
US2752540A (en) Operating magnet structure for rotary electric switches
GB1217976A (en) Electromagnetic relay construction
KR950003275B1 (en) Slim-type electromagnetic relay
US3431521A (en) Electromagnetic relay of small size and simple structure with unitary core and yoke member

Legal Events

Date Code Title Description
AS Assignment

Owner name: PLESSEY OVERSEAS LIMITED

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PLESSEY COMPANY LIMITED THE;REEL/FRAME:003962/0736

Effective date: 19810901