US3470505A - Bistable diaphragm relay - Google Patents

Bistable diaphragm relay Download PDF

Info

Publication number
US3470505A
US3470505A US671762A US3470505DA US3470505A US 3470505 A US3470505 A US 3470505A US 671762 A US671762 A US 671762A US 3470505D A US3470505D A US 3470505DA US 3470505 A US3470505 A US 3470505A
Authority
US
United States
Prior art keywords
relay
diaphragm
magnetic
contact
permanent magnet
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
US671762A
Other languages
English (en)
Inventor
Harry Stanley Woodhead
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 US3470505A publication Critical patent/US3470505A/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
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H01H51/284—Polarised relays
    • H01H51/285—Polarised relays for latching of contacts

Definitions

  • This invention relates to electromagnetic contactmaking relays.
  • such a relay includes a permanent magnet, an outer magnetic member, an inner magnetic member passing through an aperture in the outer magnetic member and electrically insulated therefrom, and a resilient diaphragm of magnetic material secured at its periphery to the outer magnetic member and in its unstressed state spaced from the inner magnetic member constituting contacts of the relay and being capable of being brought into contact with each other by virtue of the flux threading a principal magnetic circuit including the said two magnetic members and the permanent magnet, the magnitude of which flux at least across the contacts may be altered by the energisation of an actuating winding disposed around an element in said principal magnetic circuit.
  • polarised magnetically latching electromagnetic relay is defined to mean a bistable relay incorporating a magnetic circuit which, while the actuating winding is not energised, is threaded with magnetic flux having values corresponding to the operative and released positions of the contacts such as to enable the contacts to remain in either of these positions without the energising of the actuating winding.
  • FIGURE 1 shows a longitudinal section of the relay along its centre line.
  • FIGURE 2 shows a cross section of the relay in the plane marked II-II in FIGURE 1,
  • FIGURE 3 shows a cross section of the relay in the plane marked IIIIII in FIGURE 1,
  • FIGURES 4 and 5 show a cross section of the relay in the plane marked 1VIV in FIGURE 1 with the shunt member in positions of maximum and minimum reluctance respectively.
  • the contact assembly of the relay includes a mild steel annulus having a nickel-iron rod 11 secured within its central aperture and electrically insulated therefrom by an impervious annular seal 12, for example of glass.
  • the annulus 10 and the rod 11 form part of the magnetic circuit of the relay.
  • a shallow hole is drilled into one end ice of the rod 11 to leave the annular end face 13 which forms one of the two co-operating contacts of the relay.
  • the armature and the other contact of the relay are formed by a resilient diaphragm 14 of magnetic material which is secured at its periphery to the mild steel annulus 10 by means of a closure member or end cap 15 which is itself sealed around its periphery to the annulus 10.
  • a spacing ring 16 ensures that when the diaphragm 14 is in the unstressed state a suitable isolating gap remains between the central contact-making area of the diaphragm and the co-operating end face 13 of the rod 11; the correct spacing of the diaphragm may alternatively be obtained by suitably profiling the end face of the annulus 10.
  • the contact pair formed by the diaphragm 14 and the end face 13 of the central rod 11 are contained in a sealed enclosure, and that the major sealing operation involved in making the enclosure, the sealing of the rod 11 within the annulus 10, can be performed as the first manufacturing step in the construction of the relay so that the relatively high sealing temperature required cannot effect items such as the diaphragm 14 or the relay winding which are added to the assembly at a later stage.
  • the end cap 15 can be secured to the annulus 10 by low temperature soft soldering.
  • the diaphragm 14 is provided with a number of slots 17, of length much greater than their width, that serve to increase the resiliency of the diaphragm and thus to reduce the stress necessary to distort it to make contact with the co-operating contact surface 13.
  • the slots 17 are in the form of arcs of circles and are so interconnected that the ceneral contact-making area 18 of the diaphragm is connected with its peripheral area 19, by which it is secured to the annulus 10 by three tongues of metal 20, of width small relative to their length.
  • the diaphragm 14 must, of course, be made of a magnetical material such as nickel-iron alloy, and in order to provide a good electrical contact it may be plated over all or part of its area with a suitable noble metal such as palladium. A similar layer may be plated on to the end face 13 of the rod 11. Besides forming the contact surface the protective layer or layers also provide the necessary magnetically insulating spacer between the contact members.
  • Relay contact terminals 23 and 24 are aflixed to the curved surfaces of the annulus 10 and the rod 11 respectively.
  • the rod 11 forms part of the inner magnetic member of the relay and is considerably longer in the axial direction than the corresponding outer member formed by the annulus 10.
  • a polyester sleeve 25 is attached to the projecting part of the rod 11 by heat shrinking, and this serves to electrically insulate the rod 11 from the rest of the inner magnetic member formed by a nickel-iron sleeve 26, which is a slide fit over the polyester sleeve 25.
  • the remaining part of the inner magnetic member is formed by a cylindrical permanent magnet 27, which is attached to the nickel-iron sleeve 26.
  • the actuating winding 21 of the relay is wound on an insulating former 22 which surrounds the rod 11 and the sleeves 25 and 26, the diameters of the winding 21 and of the circular part of the former 22 being made not greater than the outside diameter of the annulus 10.
  • the ends of the winding are soldered to two winding terminals 28 which project through the base of the former 22, and a slot is cut in the end face of the former 22 adja- 3 cent the annulus 10 to accommodate the contact terminal 24.
  • the principal magnetic circuit formed by the permanent magnet 27, the nickel-iron sleeve 26, the rod 11 the diaphragm 14 and the annulus 10, is completed by an end plate 30 which is attached to the permanent magnet 27 and by the magnetic material of an outer cover member 29 which is sprung over the annulus 10 and the end plate 30.
  • This principal magnetic circuit is modified by the existence of a magnetic shunt member 31, having the form of a sector of an annular cylinder with its outer diameter less than the outer diameter of the annulus 10.
  • the surface of the inner diameter is rigidly attached to the nickel-iron sleeve 26 so that it lies between the permanent magnet 27 and the actuating winding 21.
  • the shunt member 31 co-operates, via a small air gap, with part of the outer cover member to provide a subsidiary magnetic circuit which includes the permanent magnet but shunts the contacts, formed by the diaphragm 14 and the end face 13 of the rod 11, and that part of the rod 11 lying within the actuating winding 21.
  • the assembly of the end plate 30, the permanent magnet 27, the nickel-iron sleeve 26 and the shunt member 31, is capable of rotation about the polyester sleeve 25 whereby the reluctance of the subsidiary magnetic circuit may be adjusted to a desired value.
  • the positions of maximum and minimum reluctance are shown in FIGURES 4 and 5 respectively.
  • the spacing of the pins forming the contact terminals and the winding terminals may be such as to comply with the normal track spacing for printed circuit assemblies, the small physical dimensions of the relay (a practical realisation of the arrangement shown in the drawings being approximately 0.9 inch long and 0.4 inch in diameter) rendering it particularly suitable for such applications.
  • a shunt member 31 providing a subsidiary magnetic circuit including the permanent magnet but shunting the contacts and the part of the rod 11 lying Within the actuating winding 21 gives rise to a number of advantages. Firstly it enables the adjustment, during manufacture of the relay, of the flux across the relay contacts. Secondly it shunts the permanent magnet from the demagnetising field produced when the operating winding is energised in such a way as to reduce the flux across the contacts so as to effect their separation. Thirdly it lowers the reluctance of the magnetic circuit seen by the actuating winding thereby enabling a smaller number of ampere-turns to cause the operation or release of the relay. And fourthly it causes a greater change of flux across the contacts between the released and the operated positions because some of the flux from the permanent magnet is switched from threading the shunt to threading the contacts and this results in an improvement of the latching properties of the relay.
  • An electromagnetic polarized magnetically latching contact making relay including an actuating winding, an outer magnetic member, an inner magnetic member terminating in first and second ends and passing through an aperture in the outer magnetic member and electrically insulated therefrom, a resilient diaphragm of magnetic material secured at its periphery to the outer magnetic member and in its unstressed state spaced from the first end of the inner magnetic member, a permanent magnet held in alignment near the second end of the inner magnetic member, the diaphragm and the inner magnetic member constituting contacts of the relay which once brought into contact with each other are capable of holding in contact with each other by virtue of the flux threading a principal magnetic circuit, the principal magnetic circuit including the said two magnetc members and the permanent magnet, the total magnitude of the flux across the contacts being subject to alteration by the energization of the actuating winding disposed around an element in said principal magnetic circuit, and the contacts being subject to a change in status accordingly.
  • a relay as claimed in claim 1 having a magnetic shunt member providing a subsidiary magnetic circuit which includes the permanent magnet but shunts the con tacts and the magnetic material within the actuating windmg.
  • a relay as claimed in claim 4 wherein at least while the diaphragm is in its released position and 'while the actuating winding is not energized there is more magnetic flux in the shunt member than in the diaphragm.
  • a relay as claimed in claim 6 which is a polarized magnetically latching relay.
  • a relay according to claim 1 wherein the diaphragm has therein two or more apertures situated between its peripheral and contact-making areas and so formed that their presence reduces the stress necessary to cause the diaphragm to make contact with the inner magnetic member.
  • a relay according to claim 8 wherein the said apertures are slots of width small relative to their length.
  • a relay according to claim 1 wherein the contactmaking surface of the inner magnetic member has the form of a plane annulus.
  • An electromagnetic contact making relay including an actuating winding, an outer magnetic member, an inner magnetic member terminating in first and second ends and passing through an aperture in the outer magnetic member and electrically insulated therefrom, a resilient diaphragm of magnetic material secured at its periphery to the outer magnetic member and in its unstressed state spaced from the first end of the inner magnetic member, a permanent magnet held in spaced relation from the second end of the inner magnetic member, the diaphragm and the inner magnetic member constituting contacts of the relay and being capable of being brought into contact with each other by virtue of the flux threading a principal magnetic circuit, the principal magnetic circuit including the said two magnetic members and the permanent magnet, the magnitude of which flux at least across the contacts may be altered by the energization of the actuating winding disposed around an element in said principal magnetic circuit, a magnetic shunt member providing a subsidiary magnetic circuit which includes the permanent magnet but shunts the contacts and the magnetic material within the actuating winding, said subsidiary magnetic circuit including a gap between magnetic materials at one end

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Cable Accessories (AREA)
  • Magnetic Treatment Devices (AREA)
US671762A 1966-10-21 1967-09-29 Bistable diaphragm relay Expired - Lifetime US3470505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47148/66A GB1098145A (en) 1966-10-21 1966-10-21 Electromagnetic relays

Publications (1)

Publication Number Publication Date
US3470505A true US3470505A (en) 1969-09-30

Family

ID=10443909

Family Applications (1)

Application Number Title Priority Date Filing Date
US671762A Expired - Lifetime US3470505A (en) 1966-10-21 1967-09-29 Bistable diaphragm relay

Country Status (9)

Country Link
US (1) US3470505A (fr)
JP (1) JPS4938505B1 (fr)
BE (1) BE705468A (fr)
CH (1) CH484507A (fr)
ES (1) ES346234A2 (fr)
FR (1) FR93228E (fr)
GB (1) GB1098145A (fr)
NL (1) NL6714329A (fr)
SE (1) SE338804B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1583127A1 (fr) * 2004-04-01 2005-10-05 Schneider Electric Industries SAS Dispostif de commutation életctrique, relais, prise de courant et appareils électriques comportant un tel dispositif

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128406B (en) * 1982-09-08 1986-02-12 Standard Telephones Cables Ltd Electrical contact units

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113251A (en) * 1961-02-06 1963-12-03 Moser Robert Highly sensitive relay with permanent magnet and shunt
US3331040A (en) * 1963-05-13 1967-07-11 Int Standard Electric Corp Miniature diaphragm relay

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113251A (en) * 1961-02-06 1963-12-03 Moser Robert Highly sensitive relay with permanent magnet and shunt
US3331040A (en) * 1963-05-13 1967-07-11 Int Standard Electric Corp Miniature diaphragm relay

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1583127A1 (fr) * 2004-04-01 2005-10-05 Schneider Electric Industries SAS Dispostif de commutation életctrique, relais, prise de courant et appareils électriques comportant un tel dispositif
US20050219022A1 (en) * 2004-04-01 2005-10-06 Schneider Electric Industries Sas Electric switching device, relay, socket and electric apparatuses comprising such a device
FR2868595A1 (fr) * 2004-04-01 2005-10-07 Schneider Electric Ind Sas Dispositif de commutation electrique, relais, prise de courant et appareils electriques comportant un tel dispositif
US7283027B2 (en) 2004-04-01 2007-10-16 Schneider Electric Industries Sas Electric switching device, relay, socket and electric apparatuses comprising such a device
CN100573770C (zh) * 2004-04-01 2009-12-23 施耐德电器工业公司 电子开关装置、继电器、插座和包括这样的装置的电子设备

Also Published As

Publication number Publication date
DE1589973A1 (de) 1970-06-11
NL6714329A (fr) 1968-04-22
ES346234A2 (es) 1968-12-01
BE705468A (fr) 1968-04-23
FR93228E (fr) 1969-02-28
CH484507A (de) 1970-01-15
DE1589973B2 (de) 1973-01-18
JPS4938505B1 (fr) 1974-10-18
GB1098145A (en) 1968-01-10
SE338804B (fr) 1971-09-20

Similar Documents

Publication Publication Date Title
US2877315A (en) Electromagnetic relay
US3331040A (en) Miniature diaphragm relay
US2538020A (en) Relay
US3046370A (en) Electromagnetic relay
US3467923A (en) Miniature diaphragm relay
US3178532A (en) Electromagnetic relay with contact supported armature
US3470505A (en) Bistable diaphragm relay
US3030451A (en) Switching device
US3134867A (en) Multiple-flux electrical reed relay
US3070677A (en) Switching device
US3668578A (en) Lightweight electromagnetic relay
US2993104A (en) Electromagnetic relay
US2877316A (en) Electromagnetic relay
US3098907A (en) Magnetic switches
US3153178A (en) Magnetic lock-up relay
US3699486A (en) High voltage miniaturized relay
US3643185A (en) Mercury-wetted relay and method of manufacture
US3204057A (en) Multicontact evacuated magnetic reed relay
US4535312A (en) Electrical contact units
US3215795A (en) Reed switch control
US3629749A (en) Electromagnetic switch construction
US3404358A (en) Magnetic relay structure and system
US3009998A (en) Relay comprising sealed-in contacts
US3236964A (en) Plural armature electromagnetic switch
US3222758A (en) Method of making a switching assembly