US3030468A - Electrical multiple relay unit using sealed reed contacts - Google Patents

Electrical multiple relay unit using sealed reed contacts Download PDF

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Publication number
US3030468A
US3030468A US739277A US73927758A US3030468A US 3030468 A US3030468 A US 3030468A US 739277 A US739277 A US 739277A US 73927758 A US73927758 A US 73927758A US 3030468 A US3030468 A US 3030468A
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United States
Prior art keywords
contacts
individual
central
coil
reed contacts
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Expired - Lifetime
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US739277A
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English (en)
Inventor
Donceel Jules Louis Joseph
Mus Marnix
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International Standard Electric Corp
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International Standard Electric Corp
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    • 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

Definitions

  • Relay units providing for a plurality of sealed reed contacts surrounded by a single coil are also disclosed in the above patent as well as in the U.S. Patent No. 2,39 ,123. Also, several reed contacts inside a single evacuated vessel surrounded by a common coil are shown in the U.S. Patent No. 2,535,400.
  • An object of the invention is to realize an electrical multiple relay unit using sealed reed contacts which may constitute the equivalent of several relays, which may be operated or not in various combinations and held operated by means common for all the contacts.
  • the invention relates to such a unit as defined above and comprising a plurality of elongated sealed reed contacts each of which may be influenced by at least two magnetic fields.
  • each sealed reed contact vessel is surrounded by two coils whereby the two magnetic fields respectively produced by said coils are jointly responsible for the closure of the contact.
  • the contact devices and coils may be so constructed and the energizing current may be so adjusted that a connection will be maintained between the contacts in a vessel after one of these coils is de-energized and the energization of the other coil is reduced to as low as 50% of its original energizing value.
  • Control by twomagnetic fields is also to be found in the U.S. Patent No. 2,243,399 for the purpose of closing the various contacts in sequence.
  • the purpose is to realize the equivalent of a crossbar switch
  • U.S. Patent No. 2,243,399 the aim is to produce the equipment of a stepby-step marking switch.
  • a unit as defined above consists in a common device such as a coil or a permanent magnet and in a plurality of individual coils each wrapped around one or more sealed reed contacts, with their axes parallel to and equidistant from the axis of said common device, and said common device is or may be adapted to generate a magnetic field insuflicient to cause the displacement of any of said contacts, but sufficient to hold one or more of said contacts displaced in an operated position once they have been operated with the help of the magnetic field(s) produced by the corresponding individual cil(s).
  • a permanent magnet for the common holding device is a very useful alternative when no power source is available at the place where the relay unit is located.
  • the latter may then be operated by distant pulses, and released in an analogous manner for instance by providing additional windings on the individual reed contact units, or by providing a coil mounted on the permanent magnet.
  • Another object of the invention is to minimize the size of an electrical multiple relay unit of the type defined above.
  • the common holding device is surrounded by the plurality of individual coils.
  • Yet another object of the invention is to maximize the effect of the common device.
  • said common device and eventually said individual coils is or are surrounded by one or more closely fitting magnetic material members which extend over such a part of the length of said common device that the magnetic field which it produces or is made to produce, has an increased or preferably maximum effect on the operation of the desired contacts.
  • the additional magnetic material member acting as a flux concentrator otters also the advantage that it diminishes mutual interference between the various individual contact units. This is due to a low reluctance central common path being provided which is such that displacement of a particular set of contacts will have a negligible effect on the overall reluctance, and it will therefore hardly affect the operation of the other individual contacts.
  • This feature is in itself already disclosed in the U.S. Patent No. 2,397,123 where a magnetic strip is provided outside the coil surrounding the evacuated contactv vessel, this strip being connected to one contact at one end and narrowly spaced from the other contact at its other end.
  • FIG. 1 shows a sectional side-view of a unit in accordance with the invention and through a plane including its central axis;
  • FIG. 2 shows a plan view of an alternative to the flux concentrator member shown in FIG. 1;
  • FIG. 3 shows a schematic plan view of a way in which the individual contact units can be arranged with corresponding terminals to form the complete multiple unit.
  • the multiple unit shown consists in a central cylindrical core 1 on which is mounted a corresponding winding 2.
  • This central core 1 is partially shielded by two flux concentrator members 3 and 3' which are shaped as cylinders opened at one end and oppose each other towards the inside of the unit, and made out of suitable magnetic material.
  • the spool heads 8-'8' made of suitable insulating material and pierced by suitable apertures such as 9 to permit the open ends of the reeds to be inserted'and held'therein; Central screws 1010' are used to secure these spool heads to the members 3--3'.
  • the lower spool head 8 may be made somewhat larger than the upper spool head 8 for the purpose of mounting terminals such as 11 to which may be connected the ends of the windings such as 2 and 5, as well as the ends of wires having their other ends connected to the upper reeds such as 7. In this manner, all external electrical connections can be made on one side of the multiple unit.
  • the ampere-turns which may be developed by the central common winding 2 are used not only for the purpose of holding one or more reed contacts operated, but also to help in operating them. In this manner, the various contacts may be operated in ditferent combinations by pulses supplied over corresponding signalling leads. In such a case, the maximum ampere-turns allowed to be developed by the central winding 2. are determined by considering that these ampere-turns alone cannot operate any of the individual contacts. On the other hand, the minimum ampere-turns to be developed by the central winding 2 are determined by that individual contact which it is most easy to release once it has been operated by a I pulse through its corresponding winding acting in conjunction with the ampere-turns developed by thecentral' winding.
  • the intermediate ampere-turns value for the. central. coil 2 are the minimum pressure needed to close the individual sets of contacts to prevent undesired closures, the min,- imum pressure needed to open a closed set of contacts when it is held under the control of the centralcoil, and the maximum D.C. resistance of a closed set of contacts held under the control of this common winding. Tests have permitted to verify that these two pressures as well as the resistance all increase, when the common ampereturns aredecreased.
  • the location of the common holding device at the center at the arrangement is particularly advantageous in that it permits to secure a multiple unit of overall reduced size by using inside space which is inevitably present once three individual units or more are arranged in circular fashion around a central axis.
  • the diameter of the central cylindrical, space of course increases as the number ofv units increases to become equal to the diameter of the cylindrical space taken by an individual unit when six of these are used, and becoming larger than this last diameter for a greater. number of units.
  • the axial length of. the two flux concentrator members 3-3' is chosen so that a maximum A shorter length would. reduce the effect, andon the other hand greater length would lead to a complete magnetic short-circuit.
  • the flux concentrator members extend over a substantialpart of the length, of the individual units except along their central parts where the two contact reeds form an airgap which should not be shortcircuited.
  • the pulse concentrator elements 33' shown in the FIG. 1 may evidently be designed in various ways and the choice will be determined by manufacturing considerations.
  • FIG. 2 shows an alternative embodiment of the flux concentrator elements which maybe produced from a sheet of suitable material cut as shown in the case of'six individual sealed reed units.
  • a central hole 12 is provided for fixing the flux concentrator, and holes such as 13 are made to permit the reed contacts to go through the concentrator elements.
  • Turned-up legs 14' are then made of a suitable length to provide a cylindrical arrangement open atone endand similar to that shown in FIG. 1.
  • the concentrator elements do not completely enclose the. central coil 2 since openings remain between the legs. 14.
  • the element now surrounds not only the central coil but also the individual reed units.
  • FIG. 3 shows. schematically how six. units can be arranged around the centralholding device'when the latter has a diameter somewhat larger than the: diameter of the individual cylindricalgunits.
  • the number of individual units is not such that they needbe contiguous. to one another along the outside circumference, they need not essentially be evenly spaced;
  • rectangles 15, 15 represent terminals to. which individual windings 5 may be attached by their ends, and rectangles 16 represent terminals towhich reed 7 may be electrically connected.
  • An electrical switching apparatus comprising a central coil, concentrating means encircling a portion of the coil for concentrating the magnetic flux generated by said coil when energized around a given. area thereof, a plurality of separate sealed reed contacts made of magnetic material and disposed around said coil outside of the periphery of the concentrating means, said reed contacts having their axes parallel to and equidistant from the axis of said central coil and having their operating portions in register with said given area, a plurality of separate windings, each cooperating with a ditferent one of said reed contacts, the flux developed by any of said separate windings when energized being insufficient to actuate the associated reed contacts unless said central coil is energized, the flux developed by said central coil when energized being. suflicient to maintain operated actuated reed contacts after de-energization of their associated windings.
  • said concentrating means comprises a pair of cup-shaped elements made of magnetic material, each element extending coaxi-ally over a portion of said central coil from an opposite end thereof, the space between the open ends of said elements comprising said given area.
  • said concentrating means comprises a multiarmed spider element having a plurality of arms extending in planes transverse to the plane of said element, each arm being in proximity to a difierent one of said sealed reed contacts.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
US739277A 1957-07-25 1958-06-02 Electrical multiple relay unit using sealed reed contacts Expired - Lifetime US3030468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL838193X 1957-07-25

Publications (1)

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US3030468A true US3030468A (en) 1962-04-17

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US739277A Expired - Lifetime US3030468A (en) 1957-07-25 1958-06-02 Electrical multiple relay unit using sealed reed contacts

Country Status (5)

Country Link
US (1) US3030468A (fr)
BE (1) BE569688A (fr)
CH (1) CH349702A (fr)
DE (1) DE1068813B (fr)
GB (1) GB838193A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188424A (en) * 1962-04-30 1965-06-08 Automatic Elect Lab Relay construction
US3254171A (en) * 1963-08-21 1966-05-31 Cts Corp Magnetically controlled switching device
US3270302A (en) * 1963-09-14 1966-08-30 Int Standard Electric Corp Relay with reed contacts
US3289128A (en) * 1965-10-14 1966-11-29 Automatic Elect Lab Reed relay having preliminarily operating contacts
US3302143A (en) * 1965-07-01 1967-01-31 Waynco Reed relay assembly having improved mounting means
US3430167A (en) * 1966-02-16 1969-02-25 Int Standard Electric Corp Magnetic coupling for multiple contact relays
US3431520A (en) * 1966-12-29 1969-03-04 Bell Telephone Labor Inc Reed switches fused by their walls to each other and a metal support member
US3508180A (en) * 1968-06-14 1970-04-21 Allen Bradley Co Relay with sealed contact switch modules
US3800222A (en) * 1972-09-07 1974-03-26 Motorola Inc Radio frequency switch employing reed switches and a quarter wave line
US20050128039A1 (en) * 2003-12-16 2005-06-16 Kung-Hua Weng Structure of coil inductor wave filter magnet core

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1124556B (de) * 1958-08-19 1962-03-01 Standard Elektrik Lorenz Ag Anordnung fuer koordinatenmaessig aufgebaute Durchschaltenetzwerke
US3087030A (en) * 1960-06-03 1963-04-23 Sperry Rand Corp Magnetically controlled commutator devices

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2187115A (en) * 1939-03-02 1940-01-16 Bell Telephone Labor Inc Switching device
US2318405A (en) * 1941-06-18 1943-05-04 Bell Telephone Labor Inc Relay
US2397123A (en) * 1943-04-30 1946-03-26 Bell Telephone Labor Inc Contact operation
US2821597A (en) * 1955-03-18 1958-01-28 Bell Telephone Labor Inc Register relay
US2836676A (en) * 1955-02-17 1958-05-27 Bell Telephone Labor Inc Sealed magnetic relay
US2902558A (en) * 1955-02-17 1959-09-01 Bell Telephone Labor Inc Laminated core dry reed relay

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2187115A (en) * 1939-03-02 1940-01-16 Bell Telephone Labor Inc Switching device
US2318405A (en) * 1941-06-18 1943-05-04 Bell Telephone Labor Inc Relay
US2397123A (en) * 1943-04-30 1946-03-26 Bell Telephone Labor Inc Contact operation
US2836676A (en) * 1955-02-17 1958-05-27 Bell Telephone Labor Inc Sealed magnetic relay
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

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188424A (en) * 1962-04-30 1965-06-08 Automatic Elect Lab Relay construction
US3254171A (en) * 1963-08-21 1966-05-31 Cts Corp Magnetically controlled switching device
US3270302A (en) * 1963-09-14 1966-08-30 Int Standard Electric Corp Relay with reed contacts
US3302143A (en) * 1965-07-01 1967-01-31 Waynco Reed relay assembly having improved mounting means
US3289128A (en) * 1965-10-14 1966-11-29 Automatic Elect Lab Reed relay having preliminarily operating contacts
US3430167A (en) * 1966-02-16 1969-02-25 Int Standard Electric Corp Magnetic coupling for multiple contact relays
US3431520A (en) * 1966-12-29 1969-03-04 Bell Telephone Labor Inc Reed switches fused by their walls to each other and a metal support member
US3508180A (en) * 1968-06-14 1970-04-21 Allen Bradley Co Relay with sealed contact switch modules
US3800222A (en) * 1972-09-07 1974-03-26 Motorola Inc Radio frequency switch employing reed switches and a quarter wave line
US20050128039A1 (en) * 2003-12-16 2005-06-16 Kung-Hua Weng Structure of coil inductor wave filter magnet core

Also Published As

Publication number Publication date
CH349702A (fr) 1960-10-31
BE569688A (fr)
DE1068813B (fr) 1959-11-12
GB838193A (en) 1960-06-22

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