US3467923A - Miniature diaphragm relay - Google Patents

Miniature diaphragm relay Download PDF

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Publication number
US3467923A
US3467923A US607482A US3467923DA US3467923A US 3467923 A US3467923 A US 3467923A US 607482 A US607482 A US 607482A US 3467923D A US3467923D A US 3467923DA US 3467923 A US3467923 A US 3467923A
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US
United States
Prior art keywords
relay
contact
diaphragm
magnetic member
magnetic
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
US607482A
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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 US3467923A publication Critical patent/US3467923A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H51/287—Details of the shape of the contact springs

Definitions

  • a miniature relay having changeover contacts for use in cross-point switches.
  • the movable element of the relay is a resilient diaphragm mounted on an annular support member and normally in contact on one side thereof with a rod which forms a contact and being capable of being energized to make contact with a rod on the other side thereof.
  • the diaphragm is slotted so that its central contact-making area is connected by two or more curved tongues to its periphery, increasing the resiliency of the diaphragm without appreciably increasing the reluctance of the magnetic circuits of which it forms part.
  • Approximate dimensions are 0.40 inch in diameter and 0.6 inch in length.
  • the invention relates to electromagnetic contact-making relays and is an improvement in or modification of the invention described in US. Patent No. 3,331,040.
  • such a relay includes an outer magnetic member, an inner magnetic member passing through an aperture in the outer magnetic member and electrically and magnetically insulated therefrom, and a resilient diaphragm of magnetic material in contact at its periphery to the outer magnetic member and normally spaced from the inner magnetic member on one side thereof and normally in contact on the other side thereof with a contact of the relay, said contact being electrically and magnetically insulated from said inner magnetic member and outer magnetic member the diaphragm and the inner magnetic member constituting the other contacts of the relay and being capable of being brought into contact with each other by the energisation of a magnetic circuit that includes the said inner and outer magnetic members and the diaphragm.
  • FIG. 1 shows a side view of the relay which is shown in part in longitudinal section along the centre line
  • FIG. 2 shows a plan view of the diaphragm of the relay.
  • the relay shown in the drawing is built upon a composite seal assembly comprising two mild steel annuli and 11, separated by a mild steel yoke 12 and each annuli having a nickel-iron cylindrical member 13 and 14 secured within their central aperture by an annular insulating seal 15, for example, of glass.
  • the annulus 10, yoke 12 and cylindrical member 13 form part of the magnetic circuit of the relay and the annular end face 20 of the cylindrical member 13 also forms one of the cooperating contacts of the relay.
  • the moving contact of the relay is formed by a resilient diaphragm 16 which rests at its periphery on the yoke 12, to be normally in intimate contact in a stressed condition with the other cooperating contact of the relay formed by the annular end faces 18 of the cylindrical member 14, such that there remains a suitable isolating gap between the central contact making area of the diaphragm and the cooperating end face 20 of the cylindrical member 13.
  • the inner portion 19 of the yoke 12 serves to increase the magnetic field between the annulus 10 and tube 13 and lies below the level of the end face 20 of the cylindrical member such that on energization of the relay the diaphragm may freely move across the isolating gap.
  • the diaphragm 16 and the end faces 20 and 18 of the cylindrical members 13 and 14 are contained in a sealed enclosure, and that the major operation involved in making the enclosure, the sealing of the cylindrical member 13 within the annulus 10 and the cylindrical member 14 within the annulus 11 can be performed as the first manufacturing step in the construction of the relay so that the relatively high sealing temperature required cannot affect items such as the diaphragm or the relay winding which are added at a later stage.
  • the annuli 10 and 11 can be secured to the yoke 12 by low temperature soft soldering.
  • the diaphragm 16 is provided with a number of slots 21- (FIG. 2), 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 cooperating contact surface 20.
  • the slots 21 are in the form of arcs of circles and are so interconnected that the central contact making area 22 of the diaphragm is connected with its peripheral area 17 by which it engages to the yoke 12 by three tongues of metal 23 of width small relative to their length. This arrangement allows the central area of the diaphragm considerable freedom of movement while at the same time ensuring that when it is attracted to the cylindrical member 13 by energization of the associated magnetic circuit it moves substantially normally into contact with the end face of the cylindrical member.
  • the diaphragm 16 must, of course, be made of a magnetic material such as a 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 metal such as palladiumv A similar layer may be plated on to the end plate 20 of the cylindrical member 13. Besides forming the contact surface the protective layer or layers also provide the necessary magnetically insulating spacer between the contact members.
  • the cylindrical member 13 forming the inner magnetic member is considerably longer in the axial direction than the corresponding outer magnetic member formed by the annulus 10, the projecting part of the cylindrical member being surrounded by the operating winding 24 of the relay which is surrounded by an insulating cover 25 and wound on an insulating former 26.
  • the outside diameter of the winding 24 and the former 26 is made not greater than the outside diameter of the annulus 10.
  • An insulating washer 27 separates the spool assembly 28 and end plate 30 of magnetic material.
  • the magnetic circuit is completed by an outer cover 31 of magnetic material which is sprung into position over the annulus 10 and the end cap 30.
  • An insulated cover 32 may be provided on the annulus 11 to prevent short circuiting between the cylindrical member 14 and annuli 11 by foreign bodies and contact of the terminal 34 with the annulus 10.
  • the terminals of the relay consist of contact pins projecting from the curved surface of the relay assembly.
  • the spacing of the pins may be such as to comply with the normal track spacings for printed circuit assemblies, the small physical dimensions of the relay (a practical realization being approximately 0.6 inch long and 0.4 inch in diameter) rendering it particularly suitable for such applications.
  • the coil terminals of the relay are formed by pins 33 (one not shown) projecting from the coil former 26, while the break contact terminal is formed by a pin 34 projecting from the cylindrical member 14, the make contact terminal formed by the pin 35 projecting from the cylinder member 13 and the moving contact terminal formed by the pin 36 projecting from the annulus 10.
  • the diaphragm 16 On energization of the coil 24 the diaphragm 16 is attracted to the contacts 20 of the cylindrical member 13, thereby forming a continuity of circuit between the make contact terminal 35 and the moving contact terminal 36.
  • the relay When the relay is in a de-energized state the diaphragm reverts to its less stressed position in contact with the contacts 18 of the cylindrical member 14 so providing a continuity of circuit between the break contact terminal 34 and the moving contact terminal 36.
  • An electromagnetic contact-making relay including a first outer magnetic member, a first inner magnetic member passing through an aperture in the outer magnetic member and electrically and magnetically insulated therefrom, a second outer magnetic member, a second inner magnetic member passing through an aperture in the second outer magnetic member and electrically and mag netically insulated therefrom, a resilient diaphrgm of magnetic material, support means supporting said resilient diaphragm in electrical contact at its periphery to the first and second outer magnetic members, said support means normally holding the diaphragm in spaced relationship from the inner magnetic member and on one side thereof, the second magnetic.
  • said support means causing said resilient diaphragm to form a first contact pair in cooperation with said first contact of the relay, and the diaphragm and the first inner magnetic member constituting a second contact pair for the relay and being capable of making contact with each other by the energization of a magnetic circuit, where said magnetic circuit includes the said inner and outer magnetic members and the diaphragm.
  • a relay according to claim 1 wherein'said outer members on either side of said diaphragm are physically identical and are coaxial about the longitudinal axis of said inner members.
  • a relay according to claim 5 wherein said member which separates said outer members is coaxial with said outer members about the longitudinal axis of said inner members.
  • a relay according to claim 11 including an end plate of magnetic material on the side of the operating winding remote from said outer magnetic member and a cover of magnetic material joining the end plate and said outer magnetic member and at least partly enclosing the winding, the end plate and cover forming a magnetically conductive but electrically insulating path between said outer magnetic member and the remote end of said inner magnetic member.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Reciprocating Pumps (AREA)
US607482A 1966-01-07 1967-01-05 Miniature diaphragm relay Expired - Lifetime US3467923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB841/66A GB1115401A (en) 1966-01-07 1966-01-07 Improvements in or relating to electromagnetic contact-making relays

Publications (1)

Publication Number Publication Date
US3467923A true US3467923A (en) 1969-09-16

Family

ID=9711388

Family Applications (1)

Application Number Title Priority Date Filing Date
US607482A Expired - Lifetime US3467923A (en) 1966-01-07 1967-01-05 Miniature diaphragm relay

Country Status (6)

Country Link
US (1) US3467923A (fi)
BE (1) BE692314A (fi)
CH (1) CH472779A (fi)
ES (1) ES335338A2 (fi)
GB (1) GB1115401A (fi)
NL (1) NL155675B (fi)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582596A (en) * 1968-05-17 1971-06-01 Int Standard Electric Corp Diaphragm pushbutton switches
US3626337A (en) * 1969-09-18 1971-12-07 Int Standard Electric Corp Electromagnetic relay with permanent magnet latching
JPS50122843U (fi) * 1974-03-22 1975-10-07
JPS50122844U (fi) * 1974-03-22 1975-10-07
US3962659A (en) * 1973-10-20 1976-06-08 Nippon Electric Company Limited Electromagnetic switch
US3968336A (en) * 1974-09-23 1976-07-06 Xerox Corporation Keyboard switch assembly having movable contact, and supporting helicline type legs disposed co-planar to common conductive sheet
US5473917A (en) * 1993-09-15 1995-12-12 Say; James L. Bicycle/ski lock

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1399005A (fr) * 1963-05-13 1965-05-14 Int Standard Electric Corp Relais à tiges sous enveloppe
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
FR1399005A (fr) * 1963-05-13 1965-05-14 Int Standard Electric Corp Relais à tiges sous enveloppe
US3331040A (en) * 1963-05-13 1967-07-11 Int Standard Electric Corp Miniature diaphragm relay

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582596A (en) * 1968-05-17 1971-06-01 Int Standard Electric Corp Diaphragm pushbutton switches
US3626337A (en) * 1969-09-18 1971-12-07 Int Standard Electric Corp Electromagnetic relay with permanent magnet latching
US3962659A (en) * 1973-10-20 1976-06-08 Nippon Electric Company Limited Electromagnetic switch
JPS50122843U (fi) * 1974-03-22 1975-10-07
JPS50122844U (fi) * 1974-03-22 1975-10-07
US3968336A (en) * 1974-09-23 1976-07-06 Xerox Corporation Keyboard switch assembly having movable contact, and supporting helicline type legs disposed co-planar to common conductive sheet
US5473917A (en) * 1993-09-15 1995-12-12 Say; James L. Bicycle/ski lock

Also Published As

Publication number Publication date
BE692314A (fi) 1967-07-10
GB1115401A (en) 1968-05-29
CH472779A (de) 1969-05-15
NL6700216A (fi) 1967-07-10
NL155675B (nl) 1978-01-16
ES335338A2 (es) 1967-12-01

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