US2510305A - Electromagnet with balanced armature - Google Patents

Electromagnet with balanced armature Download PDF

Info

Publication number
US2510305A
US2510305A US781298A US78129847A US2510305A US 2510305 A US2510305 A US 2510305A US 781298 A US781298 A US 781298A US 78129847 A US78129847 A US 78129847A US 2510305 A US2510305 A US 2510305A
Authority
US
United States
Prior art keywords
armature
pole pieces
relay
faces
cores
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
US781298A
Other languages
English (en)
Inventor
Harry E Ashworth
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.)
Hitachi Rail STS USA Inc
Original Assignee
Union Switch and Signal Inc
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 to BE484595D priority Critical patent/BE484595A/xx
Application filed by Union Switch and Signal Inc filed Critical Union Switch and Signal Inc
Priority to US781298A priority patent/US2510305A/en
Priority to FR970607D priority patent/FR970607A/fr
Application granted granted Critical
Publication of US2510305A publication Critical patent/US2510305A/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

  • My invention relates to electrical relays, and has particular relation to electrical relays having a centrally pivoted armature adapted to have the opposite faces of its two ends simultaneously attracted to the faces of the pole pieces provided for the relay energizing magnet. More particularly, my invention relates to an improved construction of a relay of this type.
  • An object of my invention is to provide a novel and improved relay adapted for use in applications where the relay is subjected to severe shock, jars and vibrations.
  • Another object is to provide a novel and improved relay having an armature pivoted about its center to rotate in a vertical plane and arranged to have its opposite ends attracted simultaneously to the pole faces of the energizing magnet.
  • Another object is to provide a novel and improved construction of a relay having a centrally pivoted armature and incorporating means for establishing and maintaining a predetermined relationship between the pole faces of the magnet pole pieces.
  • Another object is to improve the construction of relays having a centrally pivoted armature.
  • Fig. 1 is a front view of a novel and improved relay embodying my invention. with the cover I! omitted.
  • Fig. 2 is right side view, partially sectional, of the relay shown in Fig. 1.
  • Fig. 3 is a rear view of the relay shown in Fig. 1.
  • Fig. 4 is a top view, partially sectional, of the relay shown in Fig. 1.
  • Fig. 5 is a sectional view taken on the line V-V of Fig. 1. In each of the several views. similar partshave been designated by corresponding reference characters.
  • a relay embodying my invention is shown as comprising a frame I of suitable insulating material, such for example. as a phenol condensate product.
  • a supporting plate 2 secured by screws 3 to frame I is provided with a pair of circular openings 4 through which project cylindrical cores 5 integrally formed at their outer ends with enlarged pole pieces 6 (see Fig. 1) preferably rectangularly shaped.
  • the cores 5 are suitably threaded adjacent to the pole pieces 8 to receive core nuts 6a which when tightened down secure cores 6 to plate 2 and draw down pole pieces 6 into firm engagement with plate 2.
  • Energizing windings l are mounted on cores 5 which are connected together at their opposite ends by a back strap 8 secured to the cores by bolts 9.
  • the windings I are adapted to be supplied with current so as to constitute the cores and windings of an electromagnet.
  • the openings 4 in supporting plate 2 are located spaced apart in such a manner that with the faces of pole pieces 6 arranged in predetermined relation to each other (as shown in Fig. 1), an armature l0 may be pivotally mounted intermediate its ends to lie between the pole pieces so that the opposite faces of the two ends of the armature will be simultaneously attracted to the pole pieces 6. This arrangement is best shown in Fig.
  • the armature I0 is pivotally supported about its center on pivots I2 (see Fig. 5) carried in direct axial alignment in spaced aligned arms of a bracket l3 fastened by bolts l3a to one of the pole pieces 6 carried by plate 2.
  • the bracket l3 also carries a pair of Springs H which engage the opposite faces of armature III on opposite sides of its center, and a stop screw l5 which functions to limit the travel of armature Ill away from the pole pieces 6.
  • the springs M are adjustable by means of bolts l6 and function to impose forces on the armature tending to rotate it to a position away from the pole pieces so that when the windings I are deenergized the armature is biased to and will assume the position away from pole pieces 6, in which biased position the armature is in contact with stop screw I5.
  • windings 1 are energized by current of suitable magnitude, armature In will be attracted to the pole pieces 6 and will assume the position in which the armature is represented in the drawings.
  • the armature I is provided at its extreme ends with driving members I! of insulating material secured at one end as by screws l8 to armature l0 and operatively connected at the other end with movable contact fingers N by means of a transverse contact operating pin loosely mounted in member H.
  • the pins 20 are engaged by clips 2
  • the contact operating structure described is in general similar to that shown and claimed in Letters Patent of the United States No. 2,347,834, granted on May 2, 1944, to John W. Livingston. I
  • groups of fingers each including fingers i9, 22b and 22] arranged in alignment, are provided and preferably two of such groups of contacts (see Fig. 2) are provided for each driving member H.
  • Each group of three fingers includes a movable contact finger 19 located between a cooperating back contact finger 22b and a cooperating front contact finger 22 The forward portion of each finger is flexible and is riveted to a rigid rear portion 28 moulded into an insulating block 24.
  • Two of the insulating blocks 24 as shown support the two rows of three fingers each provided for each contact operating pin 20, and each block is removably clamped by means of screws 25 against the forward face of frame member l'so that the contacts may be readily removed and replaced with other contacts when desired.
  • each contact finger 23 is made suificiently long to extend through an aligned opening in the frame member i into a rectangular recess formed in the rear side of frame member 8, and these rigid portions of the contact fingers 23 constitute a plug for making contacts with a suitable female connector in the manner described in detail in Letters Patent No. 2,198,704, granted on April 30, 1940, to Branko Lazich.
  • an extra set of fingers 23a may be provided in frame i so as to be entirely independent of the fingers 23 carried by contact blocks 24.
  • the fingers 23a are preferably provided to constitute terminals for establishing connection between coils I and the terminals of the mating female connectors.
  • the armature and contact assembly previously described is suitably enclosed preferably by a transparent cover composed of glass or plastic, which fits in a rubber gasket 3! and is held attached to frame I by means of nuts 32 which are threaded onto hollow externally threaded tubes 33 (see Fig. 4) moulded into frame I.
  • a pull member 34 is confined between cover 30 and nuts 32 and is formed with wings adapted to be grasped so as to make the. relay readily capable of being plugged in or detached from its cooperating female connector.
  • the hollow tubes 33 may constitute 70 guides through which rods (not shown) provided on the female connector may project outwardly beyond the cover. It is contemplated that these rods will be threaded at their outer ends to receive nuts which when tightened down attach the relay to the mating female connector.
  • pivots l2 are located in alignment in such a manner that armature ID will rotate about a horizontal axis in a vertical plane.
  • the facesof the pole pieces 6 are disposed at an angle with respect to both the horizontal and vertical axis of the relay so that with the corresponding faces of the two pole pieces 6 in parallel relationship, the armature ill will also operate at an angle with the horizontal and vertical axis of the relay.
  • the parts of the relay armature are so proportioned that when the armature is in its mid-stroke position, that is, when the armature is half-way between its fully attracted position when the core pins ll engage the faces of the pole pieces 6, and its fully released position in which armature I I! engages stop screw 45, the transverse pins 20 carried at the opposite ends of armature iii are then directly in alignment with the pivots i2 and these members will all lie in the vertical axis of the relay.
  • the plane including the pivots i2 and contact operating pins 20 is perpendicular to the line of motion of the movable contact fingers i9 with the result that the arc traversed by each contact operating pin 20 is tangent to line of operation of the movable contact finger H) t the mid-stroke position of arma ture in.
  • the parts of the contact assembly and armature are so arranged that substantially a balanced armature type relay is provided. That is to say, all of the contact operating arm's, contact loads, biasing spring forces, etc., imposed upon the armature in are balanced about the center pivots i2 so that a symmetrical arrangement is provided which tends tomake the armature immune to vibration and shock.
  • armature I0 is in its released position, shock or vibration acting upon the armature will not cause the armature to rotate about the pivot l2 due to its stable condition of equilibrium.
  • the armature is energized, and it will be noted that when the armature is picked up it is held attracted by a force couple operating on the armature on opposite sides of the armature pivot mounting.
  • the faces of the pole pieces 6 be held in a predetermined relationship with each other in order to provide for proper cooperation with the opposite ends of the pivotally mounted armature I0.
  • the cores 5 preferably are formed of cylindrical material which is upset at one end to provide a rectangularly formed pole piece 6.
  • the openings 4 in the supporting plate 2 are circular in shape to permit insertion of the cores, so that these openings provide no means for establishing the predetermined relationship between the faces of the pole pieces 6. This relationship is established however in accordance with my invention by providing sidewalls 35 in the supporting member 2.
  • These sidewalls 35 are formed by milling or slotting depressions in the supporting member 2, with the sides of the depressions running parallel to each other to form a central rib (see Fig. 5) whose sides engage the faces of the pole pieces 6.
  • the cylindrical cores 5 are inserted through the holes 4 and the faces of the pole pieces 6 are then brought into alignment with the side walls 35 so that the pole pieces 6 can be forced down firmly into engagement with the side walls 35.
  • the cores are fastened to supporting plate 2 by core nuts 6a, which insure that the pole pieces 6 are held in contact with the sidewalls forming the central rib to maintain the established relationship of the faces of the pole pieces 6 with respect to each other, and to readily permit assembly of the parts of the relay.
  • An additional feature of my invention is the provision of an armature assembly comprising the armature l0, its supporting pivots l2, biasing springs I4 and armature stop [5 all mounted on the armature bracket l3.
  • the pivots l2, armature I0, springs l4 and stop [5 are first assembled on bracket [3 as a unit, and that unit is then secured to one of the pole pieces which has been prepared with drilled openings to receive the bolts I3a which attach the bracket Hi to the pole piece.
  • the bracket I3 is further secured to its pole piece 6 by dowel pins (not shown) driven through the bracket member into the pole piece.
  • This pole piece 6 is of course accurately positioned with respect to the other pole piece by the rib of supporting plate 2, so that the armature assembly when mounted on the one pole piece accurately positions the armature l0 relative to both of its cooperating pole pieces, with the armature pivots, biasing springs and stop arranged in proper relation to the armature.
  • This arrangement therefore aifords a convenient and simplified manner of assembly of the components in the relay structure.
  • a supporting plate provided with a rib and with a pair of openings disposed respectively on opposite sides of said rib, a pair of cores one extending through each of said openings and each provided with an enlarged pole piece engaging said rib, means securing said cores to said supporting plate in such manner that said pole pieces are maintained in predetermined relative positions by engagement with said rib, and a removable armature assembly secured as a unit to one of said pole pieces, said armature assembly comprising a bracket member separate from said supporting plate, a pair of pivot pins mounted in alignment in said bracket member, an armature pivotally mounted on said pivot pins intermediate its ends for movement toward and away from both said pole pieces, and spring means secured to said bracket member and engaging said armature to bias said armature away from said pole pieces.
  • a supporting plate provided with a rib and with a pair of open ings disposed respectively on opposite sides of said rib, a pair of cores one extending through each of said openings and each provided with an enlarged pole piece engaging said rib, means securing said cores to said supporting plate in such manner that said pole pieces are maintained in predetermined relative positions by engagement with said rib, and a removable armature assembly secured as a unit to one of said pole pieces, said armature assembly comprising a bracket member separate from said supporting plate, a pair of pivot pins mounted in alignment in said bracket member, an armature pivotally mounted on said pivot pins intermediate its ends for movement toward and away from both said pole pieces, spring means secured to said bracket member and engaging said armature to bias said armature away from said pole pieces, and a stop secured to said bracket member and cooperating with said armature to limit its movement due to said biasing springs.
  • a supporting plate provided with a rib and with a pair of openings disposed respectively on opposite sides of said rib, a pair of cores one extending through each of said openings and each provided with an enlarged pole piece engaging said rib, core nuts securing said cores to said supporting plate in such manner that said pole pieces are maintained in predetermined relative positions by engagement with said rib, a removable armature assembly comprising a bracket member separate from said supporting plate, a pair of pivot pins mounted in alignment in said bracket member, an armature pivotally mounted intermediate its ends on said pivot pins, and spring means secured to said bracket member and engaging opposite sides of said armature on opposite sides of its pivotal axis; and means securing said armature assembly as a unit to one oi. said pole pieces for positioning said armature in cooperating relation to bth said pole pieces with said aligned pivots located between said pole pieces.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US781298A 1947-10-22 1947-10-22 Electromagnet with balanced armature Expired - Lifetime US2510305A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE484595D BE484595A (uk) 1947-10-22
US781298A US2510305A (en) 1947-10-22 1947-10-22 Electromagnet with balanced armature
FR970607D FR970607A (fr) 1947-10-22 1948-08-20 Relais électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US781298A US2510305A (en) 1947-10-22 1947-10-22 Electromagnet with balanced armature

Publications (1)

Publication Number Publication Date
US2510305A true US2510305A (en) 1950-06-06

Family

ID=25122294

Family Applications (1)

Application Number Title Priority Date Filing Date
US781298A Expired - Lifetime US2510305A (en) 1947-10-22 1947-10-22 Electromagnet with balanced armature

Country Status (3)

Country Link
US (1) US2510305A (uk)
BE (1) BE484595A (uk)
FR (1) FR970607A (uk)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699478A (en) * 1951-03-16 1955-01-11 Us Instr Corp Electric relay
US2767280A (en) * 1952-04-29 1956-10-16 North Electric Co Relay structure
US2901572A (en) * 1954-01-22 1959-08-25 Westinghouse Air Brake Co Electrical relays

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US539123A (en) * 1895-05-14 eckert
US1696170A (en) * 1922-01-06 1928-12-18 Gen Railway Signal Co Engine relay
US1763003A (en) * 1929-05-06 1930-06-10 Bell Telephone Labor Inc Electromagnetic device
US2120339A (en) * 1935-11-30 1938-06-14 Union Switch & Signal Co Electromagnetic device
US2360664A (en) * 1940-08-03 1944-10-17 Gen Railway Signal Co Relay

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US539123A (en) * 1895-05-14 eckert
US1696170A (en) * 1922-01-06 1928-12-18 Gen Railway Signal Co Engine relay
US1763003A (en) * 1929-05-06 1930-06-10 Bell Telephone Labor Inc Electromagnetic device
US2120339A (en) * 1935-11-30 1938-06-14 Union Switch & Signal Co Electromagnetic device
US2360664A (en) * 1940-08-03 1944-10-17 Gen Railway Signal Co Relay

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699478A (en) * 1951-03-16 1955-01-11 Us Instr Corp Electric relay
US2767280A (en) * 1952-04-29 1956-10-16 North Electric Co Relay structure
US2901572A (en) * 1954-01-22 1959-08-25 Westinghouse Air Brake Co Electrical relays

Also Published As

Publication number Publication date
BE484595A (uk)
FR970607A (fr) 1951-01-08

Similar Documents

Publication Publication Date Title
US1763003A (en) Electromagnetic device
US2414961A (en) Electromagnetic device
US2510305A (en) Electromagnet with balanced armature
US2397635A (en) Electromagnetic relay
US2483658A (en) Polarized electromagnetic relay
US2760026A (en) Relay
US3340487A (en) Armature structure for an electromagnetic device
US2235861A (en) Electromagnetic relay
US2294484A (en) Electrical relay
US3088058A (en) Contactor
US2360664A (en) Relay
GB829332A (en) Improvements in and relating to electromagnetic relays
US2256653A (en) Electrical relay
US2347834A (en) Electrical switch
US2355543A (en) Electrical relay
US2406216A (en) Electromagnet
US2784274A (en) Electrical contactors
US2283270A (en) Electrical relay
US1366912A (en) Relay
US1541814A (en) Electromagnet contactor
GB465300A (en) Improvements in or relating to electro-magnetic relays
JPS6342485Y2 (uk)
GB521851A (en) Improvements in and relating to electromagnetic devices for imparting movements to lamps
US2780756A (en) Electromagnetic actuator
US2901572A (en) Electrical relays