US3331040A - Miniature diaphragm relay - Google Patents

Miniature diaphragm relay Download PDF

Info

Publication number
US3331040A
US3331040A US497945A US49794565A US3331040A US 3331040 A US3331040 A US 3331040A US 497945 A US497945 A US 497945A US 49794565 A US49794565 A US 49794565A US 3331040 A US3331040 A US 3331040A
Authority
US
United States
Prior art keywords
magnetic member
diaphragm
relay
contact
tube
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
US497945A
Inventor
Woodhead Harry Stanley
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
Priority claimed from GB1887463A external-priority patent/GB1021047A/en
Priority claimed from GB3792363A external-priority patent/GB1026564A/en
Priority claimed from GB10571/65A external-priority patent/GB1094334A/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3331040A publication Critical patent/US3331040A/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
    • 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
    • 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
    • H01H51/281—Mounting of the relay; Encapsulating; Details of connections
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/22—Switches without multi-position wipers
    • H01H67/24—Co-ordinate-type relay switches having an individual electromagnet at each cross-point
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/22—Switches without multi-position wipers
    • H01H67/30—Co-ordinate-type selector switches with field of co-ordinate coil acting directly upon magnetic leaf spring or reed-type contact member

Definitions

  • This invention relates to electromagnetic contact-making relays and particularly to relays employing annular contactswhich may be closed by a resilient diaphragm.
  • 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 secured at its periphery to the outer magnetic member and normally spaced from the inner magnetic member, the diaphragm and the inner magnetic member constituting the contacts of the relay and being capable of being brought into contact with each other by the energization of a magnetic circuit that includes the said two magnetic members and the diaphragm.
  • FIG. 1 shows a longitudinal section of the relay along its center line
  • FIG. 2 shows a cross-section of the relay in the plane marked II-II in FIG. 1.
  • the relay shown in the drawing is built up upon a composite seal assembly comprising a mild steel annulus having a nickel-iron tube 11 secured within its central aperture by an annular seal 12, for example of glass.
  • the annulus 10 and tube 11 form part of the magnetic circuit of the relay, and the annular end face 13 of the tube 11 also form one of the two cooperating 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 ensured 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 cooperating end face 13 of the tube 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 tube 11 are contained in a sealed enclosure, and that the major sealing operation involved in making the enclosure, the sealing of the tube 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 efiect 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 cooperating contact surface 13.
  • the slots 17 are in the form of arcs of circles and are so interconnected that the central 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. 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 tube 11 by enerization of the associated magnetic circuit it moves substantially normally into contact with the end face of the tube.
  • the diaphragm 14 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 noble metal such as palladium. A similar layer may be plated 'on to the end face 13 of the tube 11. Besides forming the contact surface the protective layer or layers also provide the necessary magnetic insulating spacer between the contact members.
  • the tube 11 forming the inner magnetic member of the assembly is considerably longer in the axial direction than the corresponding outer magnetic member formed by the annulus 10, the projecting part of the tube being surrounded by the operating Winding 21 of the relay which is wound on an insulating former 22.
  • the outside diameter of the winding 21 and the former 22 is made not greater than the outside diameter of the annulus 10.
  • An end plate 23 of magnetic material is secured by crimping to the end of the tube 11 projecting from the winding former 22, so as to hold the latter in position.
  • the magnetic circuit is completed by an outer cover 24 of magnetic material which is sprung into position over the annulus 10" and the end plate 23; the cover is insulated from the end plate by an insulating washer 25 to avoid electrically short-circuiting the relay contacts.
  • the tube 11 is sealed off at the end 26 remote from the contact assembly.
  • the sealingolf of the tube may be performed at any stage during the manufacturing process; for example the open tube may be used to allow the contact chamber to be evacuated or filled with a suitable inert gas, as the final manufacturing operation immediately before sealing the tube.
  • the terminals of the relay consist of contact pins projecting from the curved face of the relay assembly.
  • the spacing of the pins may be such as to comply with the normal track spacing for printed circuit assemblies, the small physical dimensions of the relay (a practical realization of the arrangement shown in the drawing 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 27 projecting from the coil former 22, while the contact terminals are formed by pins 28 and 29 respectively projecting from the outer annulus 10' of the seal assembly and from the end plate 23.
  • An electromagnetic contact-making relay including 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 secured at its periphery to the outer magnetic member and having a distinct contact area normally spaced from the inner magnetic member, said inner magnetic member being formed as a tube having an open end, the diaphragm and the open end of the inner magnetic member constituting the contacts of the relay and being capable of being brought into contact with each other by the energization of a magnetic circuit that includes the said two magnetic members and the diaphragm.
  • a relay according to claim 1 wherein the diaphragm has therein two or more apertures in the form of arcuate slots 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 2 wherein the said apertures are slots of width small relative to their length.
  • An electromagnetic contact-making relay including an outer magnetic member, an inner magnetic member passing through an aperture in the outer magnetic member and electrically and magnetically insulated therefrom, said inner magnetic member extending beyond the outer magnetic member on one side thereof and being surrounded by an operating winding of the relay, and a resilient diaphragm of magnetic material secured at its periphery to the outer magnetic member and normally spaced from the inner magnetic member, the diaphragm and the inner magnetic member constituting the contacts of the relay and being capable of being brought into contact with each other by the enerization of a magnetic circuit that includes the said two magnetic members and the diaphragm, an end plate of magnetic material on the side of the operating winding remote from the outer magnetic member and a cover of magnetic material joining the end plate and the outer magnetic member and at least partly enclosing the winding, the end plate and cover forming a magnetically conductive but electrically insulating path between the outer magnetic member and the remote end of the inner magnetic member.
  • a relay according to claim 10 wherein the contact making surface of the inner magnetic member has the form of a plane annulus.
  • a relay according to claim 10 wherein the inner magnetic member is a tube Whose end face forms the contact surface that cooperates with the diaphragm.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Contacts (AREA)
  • Relay Circuits (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

July 1 6 H. s. WOODHEAD MINIATURE DIAPHRAGM RELAY Filed Oct. 19, 1965 United States Patent 3,331,040 MINIATURE DIAPHRAGM RELAY Harry Stanley Woodhead, Harlow, England, assignor to International Standard Electric Corporation, New York, N.Y., a corporation of Delaware Filed Oct. 19, 1965, Ser. No. 497,945 Claims priority, application Great Britain, Mar. 12, 1965, 10,571/ 65 13 Claims. (Cl. 335151) This invention relates to electromagnetic contact-making relays and particularly to relays employing annular contactswhich may be closed by a resilient diaphragm.
According to the invention 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 secured at its periphery to the outer magnetic member and normally spaced from the inner magnetic member, the diaphragm and the inner magnetic member constituting the contacts of the relay and being capable of being brought into contact with each other by the energization of a magnetic circuit that includes the said two magnetic members and the diaphragm.
Other features of the invention will be evident from the following description of a preferred form of electromagnetic. relay embodying the invention. The description refers to the accompanying drawing in which:
FIG. 1 shows a longitudinal section of the relay along its center line, and
FIG. 2 shows a cross-section of the relay in the plane marked II-II in FIG. 1.
The relay shown in the drawing is built up upon a composite seal assembly comprising a mild steel annulus having a nickel-iron tube 11 secured within its central aperture by an annular seal 12, for example of glass. The annulus 10 and tube 11 form part of the magnetic circuit of the relay, and the annular end face 13 of the tube 11 also form one of the two cooperating 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 ensured 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 cooperating end face 13 of the tube 11; the correct spacing of the diaphragm may alternatively be obtained by suitably profiling the end face of the annulus 10.
It will be seen that the contact pair formed by the diaphragm 14 and the end face 13 of the central tube 11 are contained in a sealed enclosure, and that the major sealing operation involved in making the enclosure, the sealing of the tube 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 efiect 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 cooperating contact surface 13. The slots 17 are in the form of arcs of circles and are so interconnected that the central 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. 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 tube 11 by enerization of the associated magnetic circuit it moves substantially normally into contact with the end face of the tube.
The diaphragm 14 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 noble metal such as palladium. A similar layer may be plated 'on to the end face 13 of the tube 11. Besides forming the contact surface the protective layer or layers also provide the necessary magnetic insulating spacer between the contact members.
The tube 11 forming the inner magnetic member of the assembly is considerably longer in the axial direction than the corresponding outer magnetic member formed by the annulus 10, the projecting part of the tube being surrounded by the operating Winding 21 of the relay which is wound on an insulating former 22. The outside diameter of the winding 21 and the former 22 is made not greater than the outside diameter of the annulus 10. An end plate 23 of magnetic material is secured by crimping to the end of the tube 11 projecting from the winding former 22, so as to hold the latter in position. The magnetic circuit is completed by an outer cover 24 of magnetic material which is sprung into position over the annulus 10" and the end plate 23; the cover is insulated from the end plate by an insulating washer 25 to avoid electrically short-circuiting the relay contacts.
It will be seen that the tube 11 is sealed off at the end 26 remote from the contact assembly. The sealingolf of the tube may be performed at any stage during the manufacturing process; for example the open tube may be used to allow the contact chamber to be evacuated or filled with a suitable inert gas, as the final manufacturing operation immediately before sealing the tube.
The terminals of the relay consist of contact pins projecting from the curved face of the relay assembly. The spacing of the pins may be such as to comply with the normal track spacing for printed circuit assemblies, the small physical dimensions of the relay (a practical realization of the arrangement shown in the drawing 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 27 projecting from the coil former 22, while the contact terminals are formed by pins 28 and 29 respectively projecting from the outer annulus 10' of the seal assembly and from the end plate 23.
It is to be understood that the foregoing description of specific examples of this invention is not to be considered as a limitation on the scope.
What is claimed is:
1. An electromagnetic contact-making relay including 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 secured at its periphery to the outer magnetic member and having a distinct contact area normally spaced from the inner magnetic member, said inner magnetic member being formed as a tube having an open end, the diaphragm and the open end of the inner magnetic member constituting the contacts of the relay and being capable of being brought into contact with each other by the energization of a magnetic circuit that includes the said two magnetic members and the diaphragm.
2. A relay according to claim 1 wherein the diaphragm has therein two or more apertures in the form of arcuate slots 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.
3. A relay according to claim 2 wherein the said apertures are slots of width small relative to their length.
4. A relay according to claim 2 wherein the said apertures are so formed that the contact making area of the diaphragm is connected with its peripheral area by two or more tongues of width small relative to their length.
5. A relay according to claim 4 wherein at least the contact making area of the diaphragm has thereon a layer of a noble metal.
6. A relay according to claim 4 wherein the surface of the inner magnetic member that cooperates with the diaphragm has thereon a layer of a noble metal.
7. A relay according to claim 2 wherein the inner magnetic member is connected with the outer magnetic member by an impervious seal.
8. A relay according to claim 7 wherein the diaphragm is contained in a sealed enclosure formed in part by a closure member sealed at its periphery to the outer magnetic member.
9. A relay according to claim 1 wherein the inner mag netic member extends beyond the outer magnetic member on one side thereof and is surrounded by an operating winding of the relay.
10. An electromagnetic contact-making relay including an outer magnetic member, an inner magnetic member passing through an aperture in the outer magnetic member and electrically and magnetically insulated therefrom, said inner magnetic member extending beyond the outer magnetic member on one side thereof and being surrounded by an operating winding of the relay, and a resilient diaphragm of magnetic material secured at its periphery to the outer magnetic member and normally spaced from the inner magnetic member, the diaphragm and the inner magnetic member constituting the contacts of the relay and being capable of being brought into contact with each other by the enerization of a magnetic circuit that includes the said two magnetic members and the diaphragm, an end plate of magnetic material on the side of the operating winding remote from the outer magnetic member and a cover of magnetic material joining the end plate and the outer magnetic member and at least partly enclosing the winding, the end plate and cover forming a magnetically conductive but electrically insulating path between the outer magnetic member and the remote end of the inner magnetic member.
11. A relay according to claim 10 wherein the contact making surface of the inner magnetic member has the form of a plane annulus.
12. A relay according to claim 10 wherein the inner magnetic member is a tube Whose end face forms the contact surface that cooperates with the diaphragm.
13. A relay according to claim 12 wherein the said tube is closed at the end remote from the diaphragm.
References Cited UNITED STATES PATENTS 1,932,164 10/1933 Petit 20087 2,798,130 7/1957 COX 20083 2,812,406 11/1957 Egan 200166 2,933,571 4/1960 Howell 200l44 3,118,988 l/l964 Nitsch 20087 BERNARD A. GILHEANY, Primary Examiner.
J. I. BAKER, R. N. ENVALL, JR., Assistant Examiners.

Claims (1)

1. AN ELECTROMAGNETIC CONTACT-MAKING RELAY INCLUDING AN OUTER MAGNETIC MEMBER, AN INNER MAGNETIC MEMBER PASSING THROUGH AN APERTURE IN THE OUTER MAGNETIC MEMBER AND ELECTRICALLY AND MAGNETICALLY INSULATING THEREFROM, AND A RESILIENT DIAPHRAGM OF MAGNETIC MATERIAL SECURED AT ITS PERIPHERY TO THE OUTER MAGNETIC MEMBER AND HAVING A DISTINCT CONTACT AREA NORMALLY SPACED FROM THE INNER MAGNETIC MEMBER, SAID INNER MAGNETIC MEMBER BEING FORMED AS A TUBE HAVING AN OPEN END, THE DIAPHRAGM AND THE OPEN END OF THE INNER MAGNETIC MEMBER CONSTITUTING THE CONTACTS OF THE RELAY AND BEING CAPABLE OF BEING BROUGHT INTO CONTACT WITH EACH OTHER BY THE ENERGIZATION OF A MAGNETIC CIRCUIT THAT INCLUDES THE SAID TWO MAGNETIC MEMBERS AND THE DIAPHRAGM.
US497945A 1963-05-13 1965-10-19 Miniature diaphragm relay Expired - Lifetime US3331040A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1887463A GB1021047A (en) 1963-05-13 1963-05-13 Sealed-contact assemblies for light current electromagnetic relays and relays incorporating such assemblies
GB3792363A GB1026564A (en) 1963-09-26 1963-09-26 Sealed electromagnetic relays
GB10571/65A GB1094334A (en) 1965-03-12 1965-03-12 Improvements in or relating to electromagnetic contact-making relays
GB43814/65A GB1099081A (en) 1963-05-13 1965-10-15 Improvements in or relating to electro-magnetic contact making relays

Publications (1)

Publication Number Publication Date
US3331040A true US3331040A (en) 1967-07-11

Family

ID=27448053

Family Applications (1)

Application Number Title Priority Date Filing Date
US497945A Expired - Lifetime US3331040A (en) 1963-05-13 1965-10-19 Miniature diaphragm relay

Country Status (8)

Country Link
US (1) US3331040A (en)
BE (3) BE647843A (en)
CH (3) CH434470A (en)
DE (4) DE1237688B (en)
FR (1) FR91238E (en)
GB (1) GB1099081A (en)
NL (4) NL6405338A (en)
SE (2) SE338618B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3460077A (en) * 1963-05-13 1969-08-05 Int Standard Electric Corp Multiple contact miniature diaphragm relay
US3467923A (en) * 1966-01-07 1969-09-16 Int Standard Electric Corp Miniature diaphragm relay
US3470505A (en) * 1966-10-21 1969-09-30 Int Standard Electric Corp Bistable diaphragm relay
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
US3582596A (en) * 1968-05-17 1971-06-01 Int Standard Electric Corp Diaphragm pushbutton switches
US3594522A (en) * 1969-07-24 1971-07-20 Ibm Elastic diaphragm switch
US3626337A (en) * 1969-09-18 1971-12-07 Int Standard Electric Corp Electromagnetic relay with permanent magnet latching
US3629749A (en) * 1969-06-06 1971-12-21 Int Standard Electric Corp Electromagnetic switch construction
US3699486A (en) * 1971-08-02 1972-10-17 Torr Lab Inc High voltage miniaturized relay
US3831118A (en) * 1970-08-24 1974-08-20 Fifth Dimension Inc Mercury 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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004047652A1 (en) * 2004-09-30 2006-04-06 Rohde & Schwarz Gmbh & Co. Kg Contact tongue for an electrical switching device, method for producing an electrical contact tongue and electrical switching device with a contact tongue

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932164A (en) * 1930-12-17 1933-10-24 Labinal Ets Electric regulating apparatus
US2798130A (en) * 1953-05-22 1957-07-02 Cutler Hammer Inc Electric switch devices
US2812406A (en) * 1954-03-02 1957-11-05 Bell Telephone Labor Inc Electrical contact
US2933571A (en) * 1958-11-07 1960-04-19 Oak Mfg Co Relay
US3118988A (en) * 1961-03-29 1964-01-21 Siemens Ag Electromagnetic relay with conductive core and conductive housing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912539A (en) * 1958-01-20 1959-11-10 Jennings Radio Mfg Corp Vacuum relay
US3048678A (en) * 1960-06-10 1962-08-07 Space Components Inc Magnetic relays

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932164A (en) * 1930-12-17 1933-10-24 Labinal Ets Electric regulating apparatus
US2798130A (en) * 1953-05-22 1957-07-02 Cutler Hammer Inc Electric switch devices
US2812406A (en) * 1954-03-02 1957-11-05 Bell Telephone Labor Inc Electrical contact
US2933571A (en) * 1958-11-07 1960-04-19 Oak Mfg Co Relay
US3118988A (en) * 1961-03-29 1964-01-21 Siemens Ag Electromagnetic relay with conductive core and conductive housing

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3460077A (en) * 1963-05-13 1969-08-05 Int Standard Electric Corp Multiple contact miniature diaphragm relay
US3467923A (en) * 1966-01-07 1969-09-16 Int Standard Electric Corp Miniature diaphragm relay
US3470505A (en) * 1966-10-21 1969-09-30 Int Standard Electric Corp Bistable diaphragm relay
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
US3582596A (en) * 1968-05-17 1971-06-01 Int Standard Electric Corp Diaphragm pushbutton switches
US3629749A (en) * 1969-06-06 1971-12-21 Int Standard Electric Corp Electromagnetic switch construction
US3594522A (en) * 1969-07-24 1971-07-20 Ibm Elastic diaphragm switch
US3626337A (en) * 1969-09-18 1971-12-07 Int Standard Electric Corp Electromagnetic relay with permanent magnet latching
US3831118A (en) * 1970-08-24 1974-08-20 Fifth Dimension Inc Mercury switch
US3699486A (en) * 1971-08-02 1972-10-17 Torr Lab Inc High voltage miniaturized relay
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
US3979568A (en) * 1974-09-23 1976-09-07 Xerox Corporation Keyboard switch assembly having raised contacts supported by helicline legs on a common conductive sheet

Also Published As

Publication number Publication date
DE1439536C2 (en) 1977-03-10
NL155977B (en) 1978-02-15
DE1564189A1 (en) 1969-12-18
FR91238E (en) 1968-05-03
NL6410458A (en) 1965-03-29
SE338618B (en) 1971-09-13
NL6614383A (en) 1967-04-17
BE647843A (en) 1964-11-13
DE1564189B2 (en) 1973-09-13
DE1257971B (en) 1968-01-04
NL152110B (en) 1977-01-17
BE653538A (en) 1965-03-25
BE677606A (en) 1966-09-12
DE1257971C2 (en) 1974-04-04
DE1237688B (en) 1967-03-30
NL6405338A (en) 1964-11-16
SE324407B (en) 1970-06-01
CH444311A (en) 1967-09-30
NL6603049A (en) 1966-09-13
CH452021A (en) 1968-05-15
DE1439536B1 (en) 1972-07-27
CH434470A (en) 1967-04-30
GB1099081A (en) 1968-01-17

Similar Documents

Publication Publication Date Title
US3331040A (en) Miniature diaphragm relay
US2877315A (en) Electromagnetic relay
US3818164A (en) Vacuum type electric circuit breaker
US3811102A (en) Relay
US3345593A (en) Reed switch contact construction
US3467923A (en) Miniature diaphragm relay
US3178532A (en) Electromagnetic relay with contact supported armature
US3236965A (en) Sealed switch for strong currents
US3324432A (en) Sealed contact makers including diaphragms for closing contacts
US3668578A (en) Lightweight electromagnetic relay
US3699486A (en) High voltage miniaturized relay
US3204057A (en) Multicontact evacuated magnetic reed relay
US3643185A (en) Mercury-wetted relay and method of manufacture
US3582596A (en) Diaphragm pushbutton switches
US3307126A (en) Encapsulated magnetic switch
US3242557A (en) Method of assembling and magnetically adjusting a reed switch
US3222758A (en) Method of making a switching assembly
US3161749A (en) Vacuum relay
US2933572A (en) Relay
US2752450A (en) Electromagnetic light current contact making relays
US3629749A (en) Electromagnetic switch construction
US3296568A (en) Miniature electromagnetic relay
US1998822A (en) Electrical switching device
US3166652A (en) Magnetic reed switch with latching feature
US3171190A (en) Manufacture of electromagnetic relay