US3009998A - Relay comprising sealed-in contacts - Google Patents

Relay comprising sealed-in contacts Download PDF

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Publication number
US3009998A
US3009998A US760254A US76025458A US3009998A US 3009998 A US3009998 A US 3009998A US 760254 A US760254 A US 760254A US 76025458 A US76025458 A US 76025458A US 3009998 A US3009998 A US 3009998A
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US
United States
Prior art keywords
flux
contact springs
permanent magnet
contact
magnetic
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Expired - Lifetime
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US760254A
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English (en)
Inventor
Pfleiderer Friedrich
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 and Halske AG
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Siemens and Halske AG
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Publication date
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Publication of US3009998A publication Critical patent/US3009998A/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
    • H01H51/284—Polarised relays

Definitions

  • the contacts in relays of the above indicated kind are operatively actuated by impressing upon the contact springs a magnetic flux which produces a field of force across the air gap, causing attraction of the contact springs and therewith closure of the contact points controlled thereby.
  • an excitcr winding surrounding the sealed casing is employed for producing the flux to be impressed upon the contact springs.
  • the invention shows a way for avoiding these drawbacks.
  • the relay having the sealed-in contacts comprises, according to the invention, a permanent magnet the flux of which is closed by way of the contact springs and a magnetizable electrically conductive member, the magnetic conductivity of which is aifected by flux displacement by means of a control current connected to and flowing through the member to produce a flux flowing through the contact springs which effects operative actuation thereof.
  • the magnetizable. member is provided in the form of a magnetic shunt whichweakens the flux through the contact springs in normal condition to suchan extent that contact engagement cannot be effected, while producing for the actuation of the contacts a magnetic impedance opposed to the field of the permanent magnet,
  • the magnetizable member will vbe disposedas a magnetic impedance in asingle magnetic circuit including the permanent magnet and the contact springs, a flux flowing in normal condition over such circuit which causes closure of the contact springs; however, when controlcurrent is connected to the magnetizable member, the flux flowing through the contact springs will be weakened to such an extent that contact-making engagement is prevented and the springs accordingly open.
  • FIGS. 1 to 3 show examples of sealed-in make contacts comprising a magnetizable member as a shunt to a permanent magnet
  • FIG. 4 illustrates a sealed-in break contact comprising a magnetizable conductor acting as a magnetic impedance.
  • make contact springs F1 and F2 are sealed in a tubular casing S having a permanent magnet D disposed adjacent thereto.
  • the flux of the permanent magnet D extends on the one hand over the contact springs 2 F1 and F2 and on the other hand over a magnetic shunt N which is separated from the permanent magnet D by means of electrically insulating spacing members A.
  • the magnetic shunt N absorbs so much of the flux delivered by the permanent magnet D that the fluxflowing over the contact springs F1 and F2 is insufficientfor the operative contact-making operation thereof.
  • the magnetic shunt N which is electrically conductive
  • the first noted flux extends interiorly of the shunt circularly about the current flow, that is, perpendicularly to the flux delivered by the permanent magnet which extends in the direction of the longitudinal axis of the shunt or parallel to the current flow.
  • the super imposing of the fluxes eflfects a displacement of the flux delivered by the permanent magnet D which is for practical purposes equivalent to a strengthening of the magnetic impedance of the shunt N with respect to the field of the permanent magnet D.
  • the flux over the contact springs F1 and F2 consequently increases. This increase may be driven so far by increase of the current flowing through the magnetic shunt N that the contact points between the contact springs F1 and F2 are closed.
  • the current traversing the shunt N accordingly acts as control current.
  • the magnetic shunt N is disposed between the sealed tubing S and the permanent magnet D.
  • This structure and arrangement acts in principle in the same manner as the example shown in FIG. 1, but the flux delivered by the permanent magnet D must permeate the magnetic shunt N so as to reach the contact springs F1 and F2. Accordingly, lower control currents are required for the operative actuation of the structure.
  • the permanent magnet D must however be stronger. I
  • the magnetic shunt N is shown as a simple elongatedconductor which may, for example, consist of a narrow, metallic strip.
  • the required flux displacement by
  • the magnetic shunt consists of electrically conductive wire turns W disposed in undulating manner, such turns in their total length representing a higher electrical resistance than the magnetic shunts shown in FIGS. 1 and 2, but having at the same time magnetically only the length of the permanent magnet D disposed underneath thereof.
  • the structure accordingly corresponds in its operative response to the embodiment illustrated in FIG. 1.
  • wire turns may be disposed between the permanent magnet and the sealed tubing, thus arriving at a structure corresponding to the embodiment shown in FIG. 2.
  • FIG. 4 shows a sealed-in contact in its normal or resting position with the contact points of the springs F1 and F2 in contact-making engagement.
  • a flux produced by a permanent magnet D is impressed on the contact springs F1 and F2 which elfects contact-making engagement of the contact points of the springs.
  • the permanent magnet D is on the one hand magnetically connected with the contact spring F2 and on the other hand over a magnetic resistance V with the other contact spring F1.
  • the magnetic resistance V constitutes the electrically c0nductive magnetizable shunt conductor. If a control current is caused to flow over the magnetic resistance V, the flux flowing over the contact springs will be weakened, causing the springs to separate so as to open the contact points thereof to break the circuit controlled thereby.
  • the magnetic resistance V may of course be in the form of a metallic strip adapted for the desired purpose or in the form of a wire disposed in a plurality of undulating turns.
  • circuit means ' may be used throughout for connecting the control current to the electrically conductive and magnetizable control member such as M, W and V shown in the drawing.
  • a device for controlling the operative actuation of said contact springs comprising a magnetizable and electrically conductive member adapted for connection to a current source to cause control current to flow therethrough, and a permanent magnet for producing a flux normally extending over said member and over said contact springs, said permanent magnet and member being disposed to operatively bridge said contact springs whereby current flowing through said member causes flux displacement therein affecting the mag netic conductivity thereof to produce a flux flowing over said contact springs which effects operative actuation thereof.
  • a device for controlling the operative actuation of said contact springs comprising a magnetizable and electrically conductive member adapted for connection to a current source to cause control current to flow therethrough, a permanent magnet for producing a flux normally extending over said member and over said contact springs, current flowing through said member causing flux displacement therein affecting the magnetic conductivity thereof to produce a flux flowing over said contact springs which effects operative actuation thereof, said magnetizable member comprising a magnetic resistance, and means for connecting said resistance in a single magnetic circuit including said permanent magnet and said contact springs, flux normally flowing in said magnetic circuit effecting contact-making engagement of said contact springs, current flowing through said magnetic resistance being operative to weaken said flux so as to effect opening of said contact springs.
  • a device for controlling the operative actuation of said contact springs comprising a magnetizable and electrically conductive member in the form of a metallic strip adapted for connection to a current source to cause control current to flow therethrough, and a permanent magnet for producing a flux normally extending over said member and over said contact springs, current flowing through said member causing flux displacement therein affecting the magnetic conductivity thereof to produce a flux flowing over said contact springs which eflects operative actuation thereof.
  • a device for controlling the operative actuation of said contact springs comprising a magnetizable and electrically conductive member in the form of an undulating wire adapted for connection to a current source to cause control current to flow therethrough, and a permanent magnet for producing a flux normally extending over said member and over said contact springs,
  • a device for controlling the operative actuation of said contact springs comprising a magnetizable and electrically conductive member adapted for connection to a current source to cause control current to flow therethrough, and a permanent magnet for producing a flux normally extending over said member and over said contact springs, current flowing through said member causing flux displacement therein aflecting the magnetic conductivity thereof to produce a flux flowing over said contact springs which effects operative actuation thereof, said magnetizable member forming a magnetic shunt which is normally eifective to weaken the flux flowing over said contact springs so as to prevent con! tact-making actuation thereof, current flowing through said shunt producing a magnetic impedance opposed to the field of said permanent magnet to cause flux to flow over said contact springs which effects contact-making actuation thereof.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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US760254A 1957-09-20 1958-09-10 Relay comprising sealed-in contacts Expired - Lifetime US3009998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES55192A DE1059567B (de) 1957-09-20 1957-09-20 Schutzrohrkontaktrelais

Publications (1)

Publication Number Publication Date
US3009998A true US3009998A (en) 1961-11-21

Family

ID=7490293

Family Applications (1)

Application Number Title Priority Date Filing Date
US760254A Expired - Lifetime US3009998A (en) 1957-09-20 1958-09-10 Relay comprising sealed-in contacts

Country Status (6)

Country Link
US (1) US3009998A (fr)
BE (1) BE570844A (fr)
CH (1) CH363092A (fr)
DE (1) DE1059567B (fr)
GB (1) GB842960A (fr)
NL (2) NL231352A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056868A (en) * 1959-08-03 1962-10-02 Bell Telephone Labor Inc Switching device
US3099727A (en) * 1961-02-01 1963-07-30 Int Standard Electric Corp Magnetic crossbar switch
US3141079A (en) * 1962-06-29 1964-07-14 Bell Telephone Labor Inc Magnetically controlled switching devices
US3141078A (en) * 1962-05-24 1964-07-14 Bell Telephone Labor Inc Forked magnetically operated contact assemblage
US3204059A (en) * 1962-11-15 1965-08-31 Wheelock Signals Inc Magnetically latched relay
US3259715A (en) * 1964-07-22 1966-07-05 Bell Telephone Labor Inc Locally biased reed switches

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169827A (en) * 1936-03-06 1939-08-15 Stewart Warner Corp Electric fuel pump
US2264022A (en) * 1940-06-27 1941-11-25 Bell Telephone Labor Inc Relay
US2289830A (en) * 1938-03-29 1942-07-14 Bell Telephone Labor Inc Circuit closing device
US2821597A (en) * 1955-03-18 1958-01-28 Bell Telephone Labor Inc Register relay
US2836673A (en) * 1954-10-28 1958-05-27 Boeing Co Make-before-break relays
US2877315A (en) * 1956-06-19 1959-03-10 Bell Telephone Labor Inc Electromagnetic relay
US2902558A (en) * 1955-02-17 1959-09-01 Bell Telephone Labor Inc Laminated core dry reed relay

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169827A (en) * 1936-03-06 1939-08-15 Stewart Warner Corp Electric fuel pump
US2289830A (en) * 1938-03-29 1942-07-14 Bell Telephone Labor Inc Circuit closing device
US2264022A (en) * 1940-06-27 1941-11-25 Bell Telephone Labor Inc Relay
US2836673A (en) * 1954-10-28 1958-05-27 Boeing Co Make-before-break relays
US2902558A (en) * 1955-02-17 1959-09-01 Bell Telephone Labor Inc Laminated core dry reed relay
US2821597A (en) * 1955-03-18 1958-01-28 Bell Telephone Labor Inc Register relay
US2877315A (en) * 1956-06-19 1959-03-10 Bell Telephone Labor Inc Electromagnetic relay

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056868A (en) * 1959-08-03 1962-10-02 Bell Telephone Labor Inc Switching device
US3099727A (en) * 1961-02-01 1963-07-30 Int Standard Electric Corp Magnetic crossbar switch
US3141078A (en) * 1962-05-24 1964-07-14 Bell Telephone Labor Inc Forked magnetically operated contact assemblage
US3141079A (en) * 1962-06-29 1964-07-14 Bell Telephone Labor Inc Magnetically controlled switching devices
US3204059A (en) * 1962-11-15 1965-08-31 Wheelock Signals Inc Magnetically latched relay
US3259715A (en) * 1964-07-22 1966-07-05 Bell Telephone Labor Inc Locally biased reed switches

Also Published As

Publication number Publication date
NL231352A (fr)
CH363092A (de) 1962-07-15
DE1059567B (de) 1959-06-18
NL101920C (fr)
GB842960A (en) 1960-08-04
BE570844A (fr)

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