US3324432A - Sealed contact makers including diaphragms for closing contacts - Google Patents

Sealed contact makers including diaphragms for closing contacts Download PDF

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Publication number
US3324432A
US3324432A US571678A US57167866A US3324432A US 3324432 A US3324432 A US 3324432A US 571678 A US571678 A US 571678A US 57167866 A US57167866 A US 57167866A US 3324432 A US3324432 A US 3324432A
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US
United States
Prior art keywords
sealed
enclosure
rods
tongues
plate
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
US571678A
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English (en)
Inventor
Ridler Desmond Sydney
Myatt Edward Ronald
Loveland Ernest Frederick
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
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International Standard Electric Corp
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Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
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Publication of US3324432A publication Critical patent/US3324432A/en
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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

  • SEALED CONTACT MAKERS INCLUDING DIAPHRAGMS FOR CLOSING CONTACTS F/GZ 2 Sheets-Sheet l S. RIDLER ETAL D. SEALED CONTACT Filed July 2'7, 1966 June 6, 1967 I MAKERS ncwnme DIAPHRAGMS F cnosme CONTACTS 2 Sheets-Sheet 2 United States Patent 3,324,432 SEALED CUNTACT MAKERS INCLUDING DIA- PHRAGMS FOR CLOSING CONTACTS Desmond Sydney Ridler, Edward Ronald Myatt, and Ernest Frederick Loveland, London, England, assignors to International Standard Electric Corporation, New York, N.Y., a corporation of Delaware Filed July 27, 1966, Ser. No.
  • This invention relates to sealed contact devices i.e. devices having contact making members hermetically sealed inside an enclosure, particularly for usein light current electromagnetic relays.
  • a sealed multiple con-tact device which includes, within a hermetically sealed enclosure, a flat resilient plate of ferromagnetic metal having a peripheral area which is sealed into the enclosure and a plurality of inwardly extending tongues, a contact .area of electrically conductive material carried on each tongue and insulated therefrom by a layer of electrically insulating material, and two fixed contacts of electrically conductive material for each tongue sealed through the enclosure and located so that upon the application of magnetic flux through the device the tongues move and each contact area bridges its corresponding two fixed cont-acts to provide an electrical path between them.
  • FIG. 1 shows a plan view of a relay, with the top cap removed
  • FIG. 2 shows a cross-sectional view, along the line AA, of the relay shown in FIG. 1, and
  • FIG. 3 shows a plan view of an alternative magnetic plate to the one shown in FIG. 1.
  • FIGS. 1 and 2 eight fixed contacts in the form of rods of ferromagnetic electrically conductive material are sealed into an annulus 11 of ferromagnetic material by a glass disc 12.
  • the ends of the rods are suitably treated, e.g. with a precious metal, to give a good electrical contact.
  • the rods 10 are positioned centrally around the axis of the annulus 11, and the glass seal 12 closes one side of the aperture through the annulus 11.
  • a flat resilient plate 13 of ferromagnetic metal is clamped between the annulus 11 and an outer cap 14 of ferromagnetic material and sealed e.g. by welding so that the cap 14 closes the other side of the aperture through the annulus 11.
  • the cap 14, the annulus 11 and the glass seal 12 thus form .a hermetically sealed enclosure within which are sealed the rods 10 and the plate 13.
  • the plate 13 has a plurality of slots of small width relative to their length which divide the plate into a peripheral area 15 and four inwardly projecting tongues 16.
  • Each tongue 16 is very roughly shaped like a silhouette of a rocking chair, and has an area 17, on its side facing the rods 10, on which is deposited a layer of electrically insulating material e.g silicon monoxide. A layer of metal is deposited over the insulating layer and a contact area of precious metal is built up on the metal layer.
  • the rods 10 are arranged in pairs, one pair for each tongue 16, so that their ends are normally separated by a small distance from the contact areas on the plate 13.
  • a coil 18 surrounds the rods 10, and a casing 19 of magnetic material is secured to the annulus 11 and surrounds the coil 18 leaving a hole through which the rods 10 project.
  • the plate 13 is included in the operating magnetic circuit of the relay, but is not included in the electrical circuits completed by the relay. Insulating material could, alternatively, be deposited over the whole free surface of the plate 13 instead of individually over each contact area 17.
  • each pair of contact rods could be on a radial line of the plate.
  • the fixed contact rods 10 be of ferromagnetic material, although this is preferred.
  • the magnetic flux could be carried into the sealed enclosure by one or more rods of ferromagnetic material separate from the fixed contact rods 10.
  • other patterns of tongues formed in the plate could be used.
  • FIG. 3 shows a plate 13 in which the four tongues are joined together at their inward ends to help maintain equality in the air gaps.
  • the pattern of slots in the plate 13 is arranged to give thenecessary flexibility and twist in the tongues to give adaquate contact pressure on the rods 10.
  • a 4-make relay as in the above-described embodiments is particularly useful as a crosspoint switch in telephone exchanges.
  • the plate 13 has four inwardly projecting tongues.
  • the invention is not limited to this number of tongues as a plate could also be suitably slotted to provide two, three or more than four tongues and a corresponding number of fixed contact rods would be provided in each case.
  • the plate 13 has been divided up by a plurality of slots of small width relative to their length. This is done so that the high proportion of the plate area which is left provides low reluctance paths for the magnetic flux which operates the relay.
  • it is not essential to form the tongues in this manner so long as there is a plurality of inwardly projecting tongues integral with a peripheral area of the plate.
  • a sealed multiple contact device which includes, within a hermetically sealed enclosure, a fiat resilient plate of ferromagnetic metal having a peripheral area which is sealed into the enclosure and a plurality of inwardly extending tongues, a contact area of electrically conductive material carried on each tongue and insulated therefrom by a layer of electrically insulating material, and two fixed contacts of electrically conductive material for each tongue sealed through the enclosure and located so that upon the application of magnetic flux through the device the tongues move and each contact area bridges its corresponding two fixed contacts to provide an electrical path between them.
  • the hermetically sealed enclosure includes an annulus of ferro magnetic material, in which one side of the aperture through the annulus is closed by a cap which seals the periphery of the plate to the annulus, and in which the other side of the aperture through the annulus is closed by a seal through which the fixed contacts project.
  • a light-current electromagnetic relay which includes a sealed multiple contact device as claimed in claim 6, in which the fixed contacts are a group of ferromagnetic rods positioned centrally around the axis of the annulus and passing through the centre of an operat ing coil outside the hermetically sealed enclosure.
  • a light-current electromagnetic relay which includes a hermeticallysealed enclosure, a first resilient plate of ferromagnetic metal within the enclosure, the
  • a plate having a peripheral area which is sealed into the enclosure and a plurality of inwardly extending tongues, a contact area of electrically conductive material carried on each tongue and insulated therefrom by a layer of electrically insulating material, two fixed contacts in the form of rods of electrically conductive material for each tongue sealed through the enclosure and located with their ends inside the enclosure separated from the corresponding tongue by a small distance, and a coil arranged outside the enclosure so that upon its energisation of magnetic flux path is set up through the enclosure which causes the tongues to move and the contact areas to bridge their corresponding pairs of fixed contacts and provide electrical paths between them.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Contacts (AREA)
  • Gasket Seals (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Electromagnets (AREA)
  • Linear Motors (AREA)
US571678A 1965-08-27 1966-07-27 Sealed contact makers including diaphragms for closing contacts Expired - Lifetime US3324432A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3691665 1965-08-27

Publications (1)

Publication Number Publication Date
US3324432A true US3324432A (en) 1967-06-06

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ID=10392211

Family Applications (1)

Application Number Title Priority Date Filing Date
US571678A Expired - Lifetime US3324432A (en) 1965-08-27 1966-07-27 Sealed contact makers including diaphragms for closing contacts

Country Status (7)

Country Link
US (1) US3324432A (xx)
BE (1) BE686084A (xx)
CH (1) CH467516A (xx)
DE (1) DE1564174A1 (xx)
ES (1) ES330661A1 (xx)
GB (1) GB1054470A (xx)
NL (1) NL6612028A (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394326A (en) * 1963-05-13 1968-07-23 Int Standard Electric Corp Electro-magnetic contact-making relays
US3448419A (en) * 1965-10-01 1969-06-03 Int Standard Electric Corp Weatherproof pushbutton key set employing sealed contacts operated by a permanent magnet
US3487342A (en) * 1968-02-07 1969-12-30 Atomic Energy Commission Magnetic repulsion actuated switch
US3526864A (en) * 1967-11-09 1970-09-01 Int Standard Electric Corp Multiple contact diaphragm relay
US3742157A (en) * 1969-09-25 1973-06-26 Lematex Inc Keyboard switch assembly with improved movable contact
US3786205A (en) * 1972-05-11 1974-01-15 Becton Dickinson Co Keyboard switch assembly with movable, multi-contact means and associated swinger portions
US4015225A (en) * 1973-12-20 1977-03-29 International Standard Electric Corporation Encapsulated electromechanical relay
US4608468A (en) * 1984-12-26 1986-08-26 Motorola, Inc. Hermetically sealed impact switch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752450A (en) * 1951-01-03 1956-06-26 Int Standard Electric Corp Electromagnetic light current contact making relays
US2933571A (en) * 1958-11-07 1960-04-19 Oak Mfg Co Relay
US3150244A (en) * 1961-03-29 1964-09-22 Siemens Ag Electromagnetic relay
GB1021047A (en) * 1963-05-13 1966-02-23 Standard Telephones Cables Ltd Sealed-contact assemblies for light current electromagnetic relays and relays incorporating such assemblies

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752450A (en) * 1951-01-03 1956-06-26 Int Standard Electric Corp Electromagnetic light current contact making relays
US2933571A (en) * 1958-11-07 1960-04-19 Oak Mfg Co Relay
US3150244A (en) * 1961-03-29 1964-09-22 Siemens Ag Electromagnetic relay
GB1021047A (en) * 1963-05-13 1966-02-23 Standard Telephones Cables Ltd Sealed-contact assemblies for light current electromagnetic relays and relays incorporating such assemblies

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394326A (en) * 1963-05-13 1968-07-23 Int Standard Electric Corp Electro-magnetic contact-making relays
US3448419A (en) * 1965-10-01 1969-06-03 Int Standard Electric Corp Weatherproof pushbutton key set employing sealed contacts operated by a permanent magnet
US3526864A (en) * 1967-11-09 1970-09-01 Int Standard Electric Corp Multiple contact diaphragm relay
US3487342A (en) * 1968-02-07 1969-12-30 Atomic Energy Commission Magnetic repulsion actuated switch
US3742157A (en) * 1969-09-25 1973-06-26 Lematex Inc Keyboard switch assembly with improved movable contact
US3786205A (en) * 1972-05-11 1974-01-15 Becton Dickinson Co Keyboard switch assembly with movable, multi-contact means and associated swinger portions
US4015225A (en) * 1973-12-20 1977-03-29 International Standard Electric Corporation Encapsulated electromechanical relay
US4608468A (en) * 1984-12-26 1986-08-26 Motorola, Inc. Hermetically sealed impact switch

Also Published As

Publication number Publication date
GB1054470A (xx)
NL6612028A (xx) 1967-02-28
CH467516A (de) 1969-01-15
DE1564174A1 (de) 1969-12-18
BE686084A (xx) 1967-02-28
ES330661A1 (es) 1967-06-16

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