US3289128A - Reed relay having preliminarily operating contacts - Google Patents

Reed relay having preliminarily operating contacts Download PDF

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Publication number
US3289128A
US3289128A US495838A US49583865A US3289128A US 3289128 A US3289128 A US 3289128A US 495838 A US495838 A US 495838A US 49583865 A US49583865 A US 49583865A US 3289128 A US3289128 A US 3289128A
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United States
Prior art keywords
reed
contact pair
relay
winding means
pair
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Expired - Lifetime
Application number
US495838A
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English (en)
Inventor
Robert K Else
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.)
Automatic Electric Laboratories Inc
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Automatic Electric Laboratories Inc
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Publication date
Application filed by Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Priority to US495838A priority Critical patent/US3289128A/en
Priority to BE687992D priority patent/BE687992A/xx
Application granted granted Critical
Publication of US3289128A publication Critical patent/US3289128A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • the reed relays of the prior art are generally of the type having individual make and/or break contacts which are operated upon the energization of the coil wound about the relay bobbin.
  • Still another object of this invention is to provide a reed relay which can be used in telephone, or the like, systems to perform both the line and cut-off functions for which in the prior art two individual reed relays were required.
  • This embodiment which has practical application, for example, as a combination line and cut-off reed relay in telephone, or the like, systems, comprises three windings wound on a solid core, L-shaped flux concentrators on each end of the core which direct the flux in the proper magnitude to reed switches which are located on the periphery of the coil assembly, and a permanent magnet. Two of the reed switches are adjacent the permanent magnet and act as normally closed contacts. Another of the reed switches is positioned close to the flux concentrators so as to operate as a preliminary make contact upon energization of two of the three windings. The remaining reed switch, which is located at a greater distance from the flux concentrators, operates, along with the two normally closed contact reed switches, upon energization of the third winding whose flux aids windings one and two.
  • FIG. 1 is a top view of the reed relay according to the invention.
  • FIG. 2 is a side View of the reed relay of FIG. 1.
  • FIG. 3 is a front view of the reed relay of FIG. 1.
  • FIG. 4 is a schematic diagram incorporating the reed relay according to the invention for use as a combination line and cut-off relay.
  • FIGS. 1-, 2 and 3 show relay comprising coil wound bobbin 24 having a solid magnetic iron core 40. Attached by means of screws 23 to core 40 are flux concentrators 22. Located on the periphery of bobbin 24 are reed switches 25, 26, 27 and 28. Magnet 21 located adjacent reed switches 26 and 27 serves to keep these particular switches in a normally closed position. Reed switch 28 is located adjacent the legs of flux concentrators 22, and thereby function as .a preliminary make contact as will be shown in greater detail hereafter.
  • FIG. 4 illustrates how a reed relay according to the invention can be advantageously used as a combination line and cut-cit relay in a line circuit.
  • FIG. 4 shows the line circuit LC111 including reed relay 9 as part of an electronic telephone switching system of the general type disclosed in co-pending application, Marker For A Communication Switching Network, W. R. Wedmore, Serial No. 304,892, filed August 27, 1963, assigned to the same assignee. Attention is particularly directed to FIG. 12 of the above-mentioned application.
  • windings 1 and 2 of relay 9 are connected through break contacts 41 and 42, respectively (which correspond to contacts 1 and 2 of relay 12CO shown in FIG. 12 in the copending application), to subscriber line leads L111R and L111T which are in turn connected to subscriber station S111.
  • Battery 37 is supplied through winding 2 of relay 9 and ground 38 is supplied through winding 1 of relay 9.
  • Control lead LlllC is connected through winding 3 of relay 9 to battery 47, and pull lead L111P is connected to resistance-battery 13 through preliminary make contacts 44. (These contacts correspond to contacts 1 of relay 12L in FIG. 12 of the copending application, in FIG.
  • Pull lead L111P is connected to ground 14 through make contacts 43. (These last-mentioned contacts correspond to contacts 3 of relay 12CO in FIG. 12 of the copending application, in FIG. 12, ground is supplied over lead BCO.)
  • Leads L111T, L111R, L111C, and L111P are in turn connected through matrices 45, through originating junctor 46 and in turn to register sender 48. These components all have their obvious counterparts in the disclosure of the copending application.
  • reed switch contact pair 28 which is located adjacent flux concentrators 22, will operate.
  • the energization of the two windings produces a magnetic field which is in opposition to the magnetic field produced by permanent magnet 21 used to hold reed switches 26 and 27 in a normally closed position, but is not strong enough to overcome the field of the permanent magnet. It is also not of sulficient strength to operate normally open reed switch 25 which has no flux concentrators in close proximity to it.
  • reed switches 25, 26 and 27 operate, that is, reed switch 25 closes and reed switches 26 :and 27 open.
  • Winding 3 is energized in a direction so as to create a magnetic field which aids the magnetic field produced by windings 1 and 2.
  • This field by itself as well as in combination with the previously mentioned field, is sulficient to operate reed switches 25, 26 and 27.
  • relay 9 As shown in FIG. 4, where it is used as a combined line and cut-off relay, will now be given.
  • Resistance-battery 13 is then detected by originating junctor 46 through the windings of certain crosspoint relays in matrices 45.
  • Originating junctor 46 which contains identifying matrices, identifies the calling line and causes the closing of certain contacts of the crosspoint relays in matrices 45 to provide a path for leads L111T, L111R and L111C through to the register sender, all as described in detail in the copending application.
  • Register sender 48 then operates to have a ground sent back through originating junctor 46, over the reed switch crosspoint contact path through matrices 45, over control lead L111C to winding 3 of relay 9. This energizes winding 3 in flux aiding with the windings 1 and 2.
  • the opening of contacts 41, 42 removes the line portion of relay 9 (e.g., windings 1 and 2) from line leads L111T, L111R to clear the line conductors from attachments, thereby to facilitate pulsing to register sender 48.
  • Contact pair 43 in closing places ground 14 on pull lead LlllP, marking the line busy.
  • relay 9 is facilitated over control lead L111C from a terminating junctor (not shown), to operate as a cut-off relay with all its incidental functions.
  • relay 9 is made a part in FIG. 4
  • the relay according to the invention may be adapted to be used with other types of telephone systems.
  • a reed relay comprising:
  • said first and second pairs of reed contacts being normally open;
  • a reed relay comprising:
  • a reed relay comprising:
  • first and second winding means wound about said core
  • each reed switch having a pair of contacts therein;
  • a permanent magnet located adjacent a third of said reed switches to hold the contact pair therein normally closed;
  • a reed relay comprising first, second, third and fourth pairs of magnetically actuable reed contacts
  • a reed relay comprising first, second, third and fourth reed switches each having a pair of contacts therein;
  • said first and second reed switches being normally open
  • a first circuit including said first and second windings and said third and fourth, normally closed, reed switches in series, said first and second windings being energized upon completion of said circuit to close said first reed switch contact pair;
  • said circuit being prepared by the closure of said first reed switch contact pair and said third winding being energized upon completion of said second circuit to close said second, normally open, reed switch contact pair and to open said third and fourth, normally closed, reed switch contact pairs thereby disconnecting said first and second windings from said first circuit;
  • a line circuit arrangement comprising in combinationa combined line and cut-oif relay of the reed relay type having line winding means and cut-off winding means and having first, second and third reed switches each with a pair of contacts, said first and second reed switch contacts pairs being normally open,
  • cut-off circuit including said cut-off winding means
  • said cut-01f circuit being prepared by the closure of said first reed switch and said cut-oft winding means being energized upon completion of said cut-off circuit to close said second, normally open, reed switch contact pair and open said third, normally closed, reed switch contact pair thereby disconnecting said line winding means from said loop circuit
  • a reed relay comprising first, second, third and fourth reed switches each having a pair of contacts therein;
  • a loop circuit including said line winding means and said third and fourth, normally closed, reed switches in series, said line winding means being energized upon completion of said loop circuit to close said first reed switch contact pair;
  • said first and second reed switch contact pairs being held closed and said third and fourth reed switch contact pairs open due to the energization of said cutoff winding means.
  • a line circuit arrangement comprising in combination a combined line and cut-off relay of the reed relay type having line winding means and cut-off winding means and having first and second reed switches each with a pair of contacts, said first contact pair being normally open, and said second contact pair being normally closed,

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
US495838A 1965-10-14 1965-10-14 Reed relay having preliminarily operating contacts Expired - Lifetime US3289128A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US495838A US3289128A (en) 1965-10-14 1965-10-14 Reed relay having preliminarily operating contacts
BE687992D BE687992A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-10-14 1966-10-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US495838A US3289128A (en) 1965-10-14 1965-10-14 Reed relay having preliminarily operating contacts

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US3289128A true US3289128A (en) 1966-11-29

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US (1) US3289128A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE687992A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412267A (en) * 1980-02-06 1983-10-25 Eaton Corporation Time-delay current sensing circuit breaker relay

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030468A (en) * 1957-07-25 1962-04-17 Int Standard Electric Corp Electrical multiple relay unit using sealed reed contacts
GB971084A (en) * 1961-11-09 1964-09-30 Ass Elect Ind Improvements in and relating to electromagnetic relays
US3160714A (en) * 1962-10-26 1964-12-08 Automatic Elect Lab Reed relay circuit
US3188424A (en) * 1962-04-30 1965-06-08 Automatic Elect Lab Relay construction
US3188425A (en) * 1961-06-14 1965-06-08 Int Standard Electric Corp Electromechanical switch for use as a crosspoint for conversation circuits
US3239626A (en) * 1962-07-23 1966-03-08 Allen Bradley Co Sealed switch relay

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030468A (en) * 1957-07-25 1962-04-17 Int Standard Electric Corp Electrical multiple relay unit using sealed reed contacts
US3188425A (en) * 1961-06-14 1965-06-08 Int Standard Electric Corp Electromechanical switch for use as a crosspoint for conversation circuits
GB971084A (en) * 1961-11-09 1964-09-30 Ass Elect Ind Improvements in and relating to electromagnetic relays
US3188424A (en) * 1962-04-30 1965-06-08 Automatic Elect Lab Relay construction
US3239626A (en) * 1962-07-23 1966-03-08 Allen Bradley Co Sealed switch relay
US3160714A (en) * 1962-10-26 1964-12-08 Automatic Elect Lab Reed relay circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412267A (en) * 1980-02-06 1983-10-25 Eaton Corporation Time-delay current sensing circuit breaker relay

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BE687992A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1967-04-10

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