US3341792A - Polarized relay having two armatures oppositely magnetized - Google Patents

Polarized relay having two armatures oppositely magnetized Download PDF

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Publication number
US3341792A
US3341792A US499797A US49979765A US3341792A US 3341792 A US3341792 A US 3341792A US 499797 A US499797 A US 499797A US 49979765 A US49979765 A US 49979765A US 3341792 A US3341792 A US 3341792A
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United States
Prior art keywords
armatures
relay
support
pole
contacts
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Expired - Lifetime
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US499797A
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English (en)
Inventor
Pfeffer Vaclav
Holecek Frantisek
Gemprle Karel
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Laboratorni Pristroje
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Laboratorni Pristroje
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/20—Non-polarised relays with two or more independent armatures

Definitions

  • the range of pivotal armature movement can be adjusted in such a manner that the movable contacts of each armature are held by a permanent magnet in contact with one of two fixed contacts connected to the poles of a source of direct current in all operative positions of the relay, whether the electromagnet is energized or not.
  • This invention relates to polarized relays.
  • the invention will be described with particular reference to its application in a system for transmitting electric pulses from a master clock to remote subordinate clocks.
  • the reliability of such a system depends on an armature of the relay being held in a contact-opening or contact-closing position.
  • the transmitted electric pulses fed to an electromagnet in the relay cannot reliably determine the position of the armature if they are relatively weak because of power losses in the line between successive relays.
  • a single conventional polarized relay, even when supplied with multiple contacts, is insuflicient.
  • the invention provides a sensitive relay capable of being operated reliably under unfavorable conditions.
  • each armature has two armatures which are pivotally mounted between the poles of the electromagnet and are magnetized with opposite polarities by one or more permanent magnets.
  • Each armature carries the movable contact portion of a switch which has two fixed contacts alternatively engaged by the movable contact when the associated armature is pivoted.
  • the permanent magnet or magnets and both armatures jointly constitute a singlemagnetic circuit in which stationary and pivotable elements define air gaps which may be adjusted by moving a normally stationary permanent magnet or shunt member relative to the supporting frame of the relay.
  • FIG. 1 shows a relay of the invention in front elevation, the supporting frame being largely omitted for the sake of clarity;
  • FIG. 2 shows the relay of FIG. 1 in side elevational section on its central plane of symmetry
  • FIG. 3 shows a modified relay in fragmentary side elevational section
  • FIGS. 4, 7, and 9 show the movable elements of a relay according to FIGS. 1 and 2 or 3 in front elevation in different operative positions;
  • FIGS. 5, 6, and 8 illustrate electrical input and output signals relevant to the ope-ration of the relay in a conventional manner.
  • FIGS. 1 and 2 there are seen two armatures 1, 2 of identical shape mounted on respective sleeves 3, 4 of non-magnetic, electrically insulating material which also support metal segments 7, 8 separated from the armatures by insulating inserts 5, 6.
  • the segments respectively carry resilient blades 9, 10 provided with pairs of contacts 11, 12 and 13, 14.
  • the sleeves 3, 4 freely rotate on a common shaft 15 which is mounted on the relay frame 17.
  • the armatures 1, 2 are respectively magnetized by the two poles of a permanent magnet 16 whose position on the frame 17 is adjustable by means of a screw 18 for varying the widths of air gaps between the magnet and the armatures.
  • the position of the screw 18 may be fixed by a set screw 19.
  • Oppositely magnetized portions of the amatures swing between the poles 20, 21 of an electromagnet 22 within the limits of a range set by an abutment pin 24 which is simultaneously received in oversized circular openings 25, 26 of the armatures.
  • the pin 24 is mounted on a lever pivotally mounted on the relay frame by a shaft 28, and normally held in engagement With a threadedly adjustable abutment 30 by a helical tension spring 29. The adjusted position of the abutment 30 may be secured by a set screw 31.
  • the pin 24 In the position of the apparatus shown in FIG. 1, the pin 24 is located in the central plane of symmetry 32 of the relay, and the armatures are in a neutral condition between the poles 20, 21.
  • the position of the pin 24 may be shifted as indicated by a curved arrow by turning the abutment 30,, whereby both armatures are moved toward the pole 21 of the electromagnet 22.
  • Turning of the abutment 30 in the opposite direction causes the range of movement of the armatures to be shifted nearer the pole 20.
  • the contacts 11, 12 on the blade 9 move between two fixed contacts 33, 34 whose positions are threadedly ad- .justable and secured by set screws 35, 36.
  • the modified relay partly shown in FIG. 3 has two sleeves 45, 46 which support the two armatures 1, 2 and replace the sleeves 3, 4.
  • Each sleeve 45, 46 also carries a ferrite ring 47, 48.
  • bearing balls 49 are axially interposed and retained in annular grooves of the sleeves.
  • the magnet 16 is replaced by a shunt of magnetically soft material of high permeability which may be moved on the frame 17, as described with reference to the magnet 16 for adjustment of the air gaps in the magnetic circuit.
  • the relay maintains this position until the magnet 22 receives a signal pulse in the opposite direction, whereby electric circuits are closed between the contacts 12-34 and 14-38, the fixed contacts 34, 38 being respectively connected to the negative and positive poles of the current source.
  • a sequence of pulses of alternating polarity graphically emitted every second by the master clock could not reliably operate the subsidiary clocks.
  • the output signal produced therefore consists of pulses of alternating polarity equal in duration to the input pulses.
  • Such an arrangement is useful for transmitting pulses of alternating polarity from a master clock to remote subsidiary clocks once a minute.
  • the aforedescribed adjustment of the armatures toward the pole 21 as illustrated in FIG. 7 may be used for transmitting a sequence of pulses of equal polarity of the type shown in FIG. 8.
  • the armature 2 remains in the position shownin fully drawn lines, and the terminal 42 is permanently connected to the negative pole of the current source by the closed contacts 13, 37.
  • the contact 11 is moved into engagement with the contact 33 for the duration of a pulse received by the electromagnet 22.
  • This arrangement may be employed for remotely operating subsidiary clocks arranged for operation by unidirectional signals.
  • the relay of the invention thus may assume the functions of two conventional polarized relays. It is built and operated at low cost, and can be installed in existing transmission systems. Better contact pressure is achieved without change in the power supply, and reliability of transmission is improved.
  • said permanent magnet means including a permanent magnet having two pole portions, each of said pole portions defining an air gap with a respective armature, and regulating means for moving said permanent magnet on said support and for thereby increasing and decreasing the widths of said air gaps.
  • abutment means on said support for limiting the range of movement of said armatures toward and away from said pole elements.
  • said armatures being pivotally mounted on said support, respective portions of said armatures being interposed between said pole elements, and said movement thereof being pivotal movement about a common axis.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US499797A 1964-11-16 1965-10-21 Polarized relay having two armatures oppositely magnetized Expired - Lifetime US3341792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS635364 1964-11-16

Publications (1)

Publication Number Publication Date
US3341792A true US3341792A (en) 1967-09-12

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ID=5410361

Family Applications (1)

Application Number Title Priority Date Filing Date
US499797A Expired - Lifetime US3341792A (en) 1964-11-16 1965-10-21 Polarized relay having two armatures oppositely magnetized

Country Status (8)

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US (1) US3341792A (de)
AT (1) AT263904B (de)
CH (1) CH434472A (de)
DE (1) DE1283962B (de)
FR (1) FR1453747A (de)
GB (1) GB1118603A (de)
NL (1) NL6514720A (de)
SE (1) SE313114B (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843696A (en) * 1953-07-10 1958-07-15 Sturrup Robert Bruce Relay mechanisms
US2859029A (en) * 1955-06-06 1958-11-04 Holcroft & Co Apparatus for treating metal parts

Also Published As

Publication number Publication date
CH434472A (de) 1967-04-30
FR1453747A (fr) 1966-06-03
SE313114B (de) 1969-08-04
GB1118603A (en) 1968-07-03
AT263904B (de) 1968-08-12
NL6514720A (de) 1966-05-17
DE1283962B (de) 1968-11-28

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