US2458247A - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
US2458247A
US2458247A US576283A US57628345A US2458247A US 2458247 A US2458247 A US 2458247A US 576283 A US576283 A US 576283A US 57628345 A US57628345 A US 57628345A US 2458247 A US2458247 A US 2458247A
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United States
Prior art keywords
relay
armature
cover
spring
backplate
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
US576283A
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English (en)
Inventor
Bryan Ernest Alfred
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and 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 Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Application granted granted Critical
Publication of US2458247A publication Critical patent/US2458247A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • This invention relates to electromagnetic relays and more particularly to relays of the kind adapted for high speedoperation wherein the armature is secured to a fiat spring which is tensioned to hold a part of the armature against a part of the relay core leaving a small air-gap between the armature and a pole-face of the relay core.
  • a relay of this character is described in specification of Patent No. 1,992,610 to Ernest J. Gachet.
  • the main features of the relay of the present invention resides in the manner in which the tension is applied to the flat spring.
  • tension is applied to the said spring by means of a member integral with it or suitably attached thereto and extending outwardly therefrom and has tension applied to it at or near its end.
  • the member may extend backwardly towards or even beyond the place of fixture of the spring.
  • For adjusting the tension in the member its end may be slotted to engage an adjusting screw screwing into the framework of the relay.
  • the armature spring may be constructed as a three pronged fork, the two outer prongs being fixed at their ends to secure the spring whilst the middle prong is employed as the said member.
  • the other end of the spring consisting of a single extension, carries the armature, and may be a contact point for making contact with fixed contacts, and may be channelled to impart rigidity thereto.
  • the fixed contact or contacts may be provided at the ends of cantilever members of a thickness such as will provide adequate rigidity yet avoid contact bounce, having their fixed ends secured in assembly with, but insulated from, the aforesaid outer prongs, and the extremities of these members are preferably supported against vibration, and for adjustment, against insulating adjustable stops engaging the framework of the relay.
  • the relay is provided with a backplate by which it is adapted to be secured to a rigid mounting and which also supports a cover covering the components of the relay.
  • the joint between the cover and the backplate may be sealed to prevent the ingress of moisture.
  • One method by which this may be accomplished is to form the backplate of two plates of rigid material between which is compressed a body of compressible moisture-impervious material, such as rubber, the said material being adapted tightly to fit within the cover when the latter is placed in position and effect a seal.
  • 1 Claim. (Cl. 175-336) wiring terminals pass through the backplate it is convenient to clamp these in position by providing bulbous portions thereon, which portions are trapped between the said material and one of the rigid plates.
  • the backplate may have moulded thereinto a metal edging over which the mouth of the cover is adapted to slide, the cover being of metal, or of a plastic having a metal mouth moulded thereinto, the joint being sealed such as by soldering the mouth of the cover to the edging,
  • a window may be provided in the cover adjacent the contacts.
  • Fig. 1 shows a side elevation of a relay with the side of the cover removed to disclose the interior arrangements, the backplate being shown in section along a line marked X in Fig. 2 which gives a rear view of the relay, that is, the left-hand end of the relay shown in Fig. 1.
  • Fig. 3 shows a plan view of the relay, the top of the cover being removed, and
  • Fig. 4 shows a sectional view of the relay looking towards the right from line Y in Fig. 3.
  • Fig. 5 shows a method dverent from that shown in Fig. 1 for mounting and sealing the cover, and also shows how a window may be provided in the cover through which the contacts may be viewed, and
  • Fig. 6 shows a rear view of Fig. 5.
  • a vertically upstanding portion or limb 4 At the right-hand end of the yoke portion I is a vertically upstanding portion or limb 4 having its end bent outwards at right angles to form an outwardly projecting bracket as indicated at 5.
  • the framework can be described as being substantially U-shaped having the end of one of its limbs (2) bent inwards (3) over and parallel with the yoke (I), whilst the end of the other limb (4) is bent outwards (5) away from and parallel with the yoke.
  • an electromagnet assembly Secured to the yoke l of the framework between the limbs 2 and 4 is an electromagnet assembly.
  • This assembly comprises a U-shaped core 6 having about each limb an energising winding 1, the core being secured yoke to yoke with the frame by screws (not shown) so that the electromagnetic assembly lies co-planar with the frame.
  • the bracket 3 supports the spring contact assembly.
  • This assembly is shown as a change over contact set comprising two outersprings 8 and 9 and an inner moving spring II) which normally, that is, when the relay is not energised, makes contact with the upper spring 8, but breaks this contact and makes contact with the lower spring 9 when the relay is energised.
  • the springs 8 and 9 are both substantially L-shaped in form and are clamped by their shorter horizontal limbs I I, in reverse manner to each other, to the bracket 3 by means of bolts I 2, there being insulating washers I3 between the springs and insulating collars passing through them to insulate them from one another and from the framework.
  • the ends of the longer vertical limbs ll of the springs are formed to project inwardly as indicated at I and have contact pieces riveted into these inward projections.
  • the moving spring III is in the form of a threepronged fork and consists of a single extension I8 which branches into two outer prongs '1 and I8 and a middle prong IS.
  • the ends of the two outer prongs I1 and I8 are suitably formed for clamping in the spring assembly to the bracket 8 whilst the middle limb extends beyond the place of fixing of the former limbs and has its end bifurcated to engage the underside of the head of an adjusting screw 2
  • the single extension I8 may have portions of its edges bent up for re-inforcement, and has secured to its underside such as by riveting or spot welding, a soft iron armature 23 disposed so as to be situated above the pole-ends of the core of the electromagnet.
  • An aperture may be provided situated between the armature and the extremity of the extension to lessen windage.
  • the middle prong I 9 engages beneath the head of the adjusting screw 2
  • the ends of the springs 8 and 9 are adjustably supported against vibration and bounce by being tensioned to rest on stop pillars 24 of insulating material (see particularly Fig. 4) attached to adlusting screws which in turn are screwed into and locked to the bracket 5 outstanding from the vertical limb 4 of the framework. Adjustment d is made by screwing the pillars 24 up or down by means of the adjusting screws.
  • guard 26 of any suitable but preferably insulating material secured to the vertical limb d of the framework to prevent inadvertent mechanical interference with the contacts and to serve as a guide and limiting stop for the cover later referred to.
  • the framework is secured by its left-hand vertical limb 2 to a backplate which comprises three parts, namely an inner plate 28 of insulating material, an intermediate cup shaped moulding 21 of compressible material such as rubber with its dished partturned outwards, and an outer moulded plate 28 of insulating material which fits into the recess of the intermediate part 21, and these are screwed as a pack to the limb 2, the part 21 being compressed between the parts 28 and 28.
  • These parts all have holes therein for permitting the passage therethrough of wiring terminals 23 and these terminals are provided with bulbous portions 30 which on clamping up the pack compress the part 21 and are thus held firmly.
  • the outer part 28 on its interior may be countersunk adjacent each hole to permit the deformation of the part 21 thereinto by the bulbous portions 30 on the pack being clamped up, and on its exterior may have bosses extending from each hole, as shown, which serve the dual purpose of giving additional support for the terminals and also increasing the electrical leakage path.
  • the wiring from the terminals to the windings of the electromagnet and the spring I8 is indicated generally by 3 I.
  • the cover 32 for the relay in Figs. 1, 2 and 3 is shown as an elongated parallelepiped metal casing having one end open and expanded. This cover is slipped over the relay mechanism so that its expanded end passes over the backplate, and
  • the relay Prior to turning over the edge of the cover and sealing of the joint the relay may be heated to drive of? moisture.
  • a dessicating agent such as silica gel, may be provided in the cover accommodated in a suitable cell or attached by suitable varnish.
  • Figs. 5 and 6 An alternative construction of backplate and method of sealing the cover is illustrated in Figs. 5 and 6.
  • the backplate consists of a moulding of insulating material 33 into which are moulded the wiring'terminals 29 and also a metal edging 34.
  • the cover 32 also of metal, slips over and has its edge soldered to the metal edging 34 as indicated at 35, the relay preferably being heated prior to the soldering as and for the purv pose aforementioned.
  • solder a thermosetting cement may be used and this also applies to the arrangement of Fig. 1 for sealing the edge of the cover to the part 28 if necessary. This also applies where the cover and backplate are entirely of plastic material.
  • the cover 32 in Fig. 5 is shown provided with a window through which the contacts may be observed.
  • This window is shown as a piece of transparent material 36 such as glass or a transparent ture in the casing, by means of a sheet metal bushing 38 secured to the casing such as by soldering or welding and surrounding the aperture and which has its edge turned over to effect the clamping.
  • the guard 25 will have therein an aperture corresponding in position to the window.
  • a U-shaped core having two pole faces, a spring having an armature portion and right and left branches extending therefrom, means located at a distance from said armature portion for fixedly supporting the outer ends of said right and left branches to position said armature portion above and clear of both said pole faces, said right and left branches sufliciently long to permit ready flexing of said right and left branches between said supporting means and said armature portion, an elongated armature secured to said armature portion adja cent to but clear of both said pole faces, a third branch intermediate said right and left branches extending from said armature portion beyond said supporting means of said right and left branches, means engaging the outer end of said' intermediate branch for tensioning said intermediate branch to downwardly flex said right and left branches, said downwardly flexed right and 6 left branches cooperating with said tensioned intermediate branch for exerting pressure downwardly on said armature portion in the immediate area where said right, left and intermediate branches merge with said armature portion, thereby to force one end of said

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Braking Arrangements (AREA)
US576283A 1943-10-08 1945-02-05 Electromagnetic relay Expired - Lifetime US2458247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB16533/43A GB569268A (en) 1943-10-08 1943-10-08 Improvements relating to electromagnetic relays

Publications (1)

Publication Number Publication Date
US2458247A true US2458247A (en) 1949-01-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US576283A Expired - Lifetime US2458247A (en) 1943-10-08 1945-02-05 Electromagnetic relay

Country Status (5)

Country Link
US (1) US2458247A (en(2012))
BE (1) BE464333A (en(2012))
FR (1) FR933137A (en(2012))
GB (1) GB569268A (en(2012))
NL (1) NL65875C (en(2012))

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522714A (en) * 1946-07-13 1950-09-19 Automatic Elect Lab Electromagnetic relay and armature therefor
US2550779A (en) * 1950-04-25 1951-05-01 Arthur M Cohen Electromagnetic unit
US2580732A (en) * 1948-06-22 1952-01-01 Arthur M Cohen Finger type circuit regulator
US2825783A (en) * 1955-07-18 1958-03-04 Raymond T Moloney Polarized relay
US2834924A (en) * 1957-01-31 1958-05-13 Essex Wire Corp Hermetically sealed electromagnetic relay
US2867755A (en) * 1954-11-03 1959-01-06 Telephone Mfg Co Ltd Electromagnetic devices
US3109077A (en) * 1959-09-18 1963-10-29 Allied Control Co Electromagnetic switch apparatus

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1140433A (en) * 1913-05-21 1915-05-25 Butler Ames Adjusting-post.
US1207736A (en) * 1914-05-02 1916-12-12 Western Electric Co Electromagnetic device.
US1508386A (en) * 1924-09-16 Driving mechanism for power-operated machines
US1867099A (en) * 1926-09-11 1932-07-12 Printel Mfg Corp Electromagnetic relay
US1944661A (en) * 1930-09-04 1934-01-23 Herman C Kalwitz Oil filled bus and switch gear
US1992610A (en) * 1932-12-02 1935-02-26 Siemens Brothers & Co Ltd Electromagnetic relay
US2366784A (en) * 1943-02-04 1945-01-09 Electric Power Equipment Corp Disconnecting switch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1508386A (en) * 1924-09-16 Driving mechanism for power-operated machines
US1140433A (en) * 1913-05-21 1915-05-25 Butler Ames Adjusting-post.
US1207736A (en) * 1914-05-02 1916-12-12 Western Electric Co Electromagnetic device.
US1867099A (en) * 1926-09-11 1932-07-12 Printel Mfg Corp Electromagnetic relay
US1944661A (en) * 1930-09-04 1934-01-23 Herman C Kalwitz Oil filled bus and switch gear
US1992610A (en) * 1932-12-02 1935-02-26 Siemens Brothers & Co Ltd Electromagnetic relay
US2366784A (en) * 1943-02-04 1945-01-09 Electric Power Equipment Corp Disconnecting switch

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522714A (en) * 1946-07-13 1950-09-19 Automatic Elect Lab Electromagnetic relay and armature therefor
US2580732A (en) * 1948-06-22 1952-01-01 Arthur M Cohen Finger type circuit regulator
US2550779A (en) * 1950-04-25 1951-05-01 Arthur M Cohen Electromagnetic unit
US2867755A (en) * 1954-11-03 1959-01-06 Telephone Mfg Co Ltd Electromagnetic devices
US2825783A (en) * 1955-07-18 1958-03-04 Raymond T Moloney Polarized relay
US2834924A (en) * 1957-01-31 1958-05-13 Essex Wire Corp Hermetically sealed electromagnetic relay
US3109077A (en) * 1959-09-18 1963-10-29 Allied Control Co Electromagnetic switch apparatus

Also Published As

Publication number Publication date
GB569268A (en) 1945-05-15
BE464333A (en(2012))
FR933137A (fr) 1948-04-12
NL65875C (en(2012))

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