US2965733A - Polar electromagnetic relay - Google Patents

Polar electromagnetic relay Download PDF

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Publication number
US2965733A
US2965733A US755907A US75590758A US2965733A US 2965733 A US2965733 A US 2965733A US 755907 A US755907 A US 755907A US 75590758 A US75590758 A US 75590758A US 2965733 A US2965733 A US 2965733A
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US
United States
Prior art keywords
armature
yoke
relay
parts
strip
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
US755907A
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English (en)
Inventor
Borg Petrus Wilhelmus Ter
Jansen Friedrich Ludwig
Jong Hendrik Johannes De
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2965733A publication Critical patent/US2965733A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays

Definitions

  • This invention relates to polar electromagnetic relays having a yoke of magnetizable material and an armature of similar material, the yoke being pre-magnetized by at least one permanent magnetic body of material having no electric conductivity and a high coercive field strength, which body is interposed between parts of the yoke.
  • the permanent magnetic body interposed between parts of the yoke may in such relays consist, for example, of a material composed of substantially non cubic crystals of poly-oxides of iron and at least one of the metals barium, strontium, lead and possibly calcium. For such a material see United States Patents Nos. 2,762,777 and 2,762,778.
  • An object of the invention is to provide a polar relay having one or more permanent magnetic bodies of no electric conductivity, in which the non conductivity of these bodies is utilised to arrive at a simple and compact structure' which keeps the cost price low and more particularly may lead to relays of small size.
  • the armature and at least one part of the yoke which is electrically separated from the other parts of the yoke by means of an interposed permanent magnetic body, have co-acting contact surfaces, the current being supplied to these contact surfaces through the armature and the relevant part of the yoke, respectively.
  • the relay is designed as a bipolar relay, the armature of which is held alternately in either of its extreme positions by the pre-magnetization.
  • the armature is surrounded by an energizing coil and has one extremity pinched between two permanent magnetic bod.es magnetized in the same direction, to each of which adjoins a part of the yoke extending substantially in the direction of length of the armature, which parts of the yoke, located on difterent sides of the armature, at the level of the other extremity of the armature, have electric contact surfaces with which a contact surface of the armature alternately co-acts.
  • the armature is so designed that its magnetic reluctance is low and, for this purpose, the armature comprises a small strip of exible metal provided, at least on one side, with two rigid plates of magnetizable material extending in line in the direction of length of the strip ⁇ a portion of one plate which bends off the strip overlapping the adjacent end of the other plate, thus forming an airgap between these plates, which permits of a movement of one plate with respect to the other by ilexion of the part of the flexible strip located between the plates.
  • Fig. l is a longitudinal section
  • Fig. 2 is a plan view of an embodiment of the relay according to the invention in the form of a bipolar relay.
  • the relay shown has a yoke constituted by two parts 1 and 2 of the same shape, each constituted by a softiron strip. Each strip is rectangularly bent four times, so that its ends are located approximately in the same plane. Placed between the extremities 3 and 4 of the two strips are two non-conductive plates 5 and 6 of permanent magnetic material, which are magnetized in the same direction.
  • a permanent magnetic material suitable for the plates S and 6 is composed of substantially non-cubic crystals of poly-ox.des of iron and at least one of the metals barium, strontium, lead and possibly calcium.
  • the armature 7 of the relay is pinched between the plates 5 and 6.
  • the armature comprises a thin strip of flexible metal 8, for example of Phosphor bronze, the pinched extremity of which and a further part have soldered to them, on each side, a thin softiron strip 9, 10 respectively.
  • the stacked parts of the yoke, the armature and the permanent magnetic bodies 5 and 6 are clamped together by means of a paper ribbon 20 tautly wound round this stack, which ribbon prior to winding was impregnated with a hardenable synthetic resin, for example a phenolformaldehyde resin. This resin is hardened after winding the ribbon 20 round the stack.
  • a hardenable synthetic resin for example a phenolformaldehyde resin.
  • the free extremity of the armature which extends between the ends 11 and 12 of the parts 1 and 2 of the yoke, is provided with two short soft-iron strips 13 and 14, which are secured, for example welded, to the exble strip only at the ends adjacent the pinched part of the armature. These ends of the strips 13 and 14 are overlapped with some play by upwardly-bent parts 15 and 16 of the soft-iron strips 9 and 10.
  • the armature 7 is surrounded by an energizing coil 17, the coil former 18 of which is maintained in position by the parts 1 and 2 of the yoke.
  • the extremities 11 and 12 of the parts 1 and 2 of the yoke are correctly spaced apart due to their being pressed into a small block 19 of insulating material, preferably of synthetic material having a high internal damping, such as polyester isocyanate. Due to their dovetail form (see Fig. 2), the extremities 11 and 12 are rigidly held in the block 19.
  • the block 19 not only spaces apart the extremities of the parts 1 and 2 of the yoke, but also reduces any rebounce tendency of the contacts.
  • the extremities 11 and 12 of the parts 1 and 2 of the yoke are provided, on the side adjacent the armature, with slightly circular electric contact surfaces 21 and 22 obtained by depression of the yoke parts and with which the strips 13 and 14 of the armature 7 can co-operate.
  • the armature is held by the pre-magnetization of the relevant part of the yoke provided by one of the permanent magnetic bodies 5 and 6.
  • the lower extremities of the parts 1 and 2 of the yoke and the armature 7, extending beyond the permanent magnetic bodies 5 and 6 are each connected to one of the lead-through pins 27 xed in the base '28 of a glass bulb 29 surrounding the relay.
  • the base 28 also contains two lead-through pins which are electrically connected to an end of the energizing winding 17 such, for
  • Thepinsin'the base 28 are grouped so as to fit into the apertures of a tube'holder for a subminiature electron tube.
  • the bulb 29, after the relay being mounted therein, may be evacuated, but it is alternatively possible to use a lling with a suitable gas, for instance an inert gas.
  • these parts are preferably covered with a layer of noble metal, for example rhodium or silver.
  • the length a of the relay described Aby way of'example is' actually only about 4l mms., fromwhich it readily appears what small dimensions may be obtained with the portionsV of the yoke, a body of electrically insulating permanent magnet material interposed between ⁇ the por-I tions of the yoke and the armature, said armature being' positioned to engage an opposing surface portion of the yoke thereby making an electrical connection betweenthe armature and one of the opposing spaced portions of the yoke, and terminal means connected to said armature and said spaced opposing portions of the yokeforcomaA pletlng an electrical connection through said armature and said yoke.
  • a polarized relay comprising a yoke including two opposing portions each of a magnetizable electricallyconductive material, an karmature of magnetizable material resiliently mounted between the opposing spaced portions of the yoke, an energizing coilsurrounding a portion of the armature, two bodies of electrically insulating permanent magnet material clamping the armature between and separating the armature from the portions of the yoke, each of.
  • said bodies being magnetized in the same direction, said armature being-positioned to alternately engage opposing surface portions of the yoke thereby making an electrical connection betweenthe armature'andone ol?l the opposing spaced portions of the yoke, and terminal means connected to said armature and said spaced opposing portions of the-yoke for completingan electrical connection through said armatureand said yoke.”
  • a polarized relay comprising a yoke including two opposing portions each ofY ammagnetizable. electrically.
  • an armature resiliently mounted between said portions of said yoke and comprising a thin ilexible metal strip, two rigid plates of magnetizable material extending in the direction of length of said strip, a portion of one plate bendng ol the strip and overlapping the adjacent extremity of the other plate therebyf'forming an air-gap between said plates which allows movement of4 one plate with respect to the other by flexion ofv the portion of thestrip betweenithe plates, an energizingv coil surroun'dingfa portion of thearmature, two bodies1of electricallyinsulatlng.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US755907A 1957-08-22 1958-08-19 Polar electromagnetic relay Expired - Lifetime US2965733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL220151 1957-08-22

Publications (1)

Publication Number Publication Date
US2965733A true US2965733A (en) 1960-12-20

Family

ID=19750958

Family Applications (1)

Application Number Title Priority Date Filing Date
US755907A Expired - Lifetime US2965733A (en) 1957-08-22 1958-08-19 Polar electromagnetic relay

Country Status (7)

Country Link
US (1) US2965733A (de)
BE (1) BE570505A (de)
CH (1) CH362436A (de)
DE (1) DE1102283B (de)
FR (1) FR1201773A (de)
GB (1) GB843728A (de)
NL (2) NL101479C (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048677A (en) * 1961-03-31 1962-08-07 Bell Telephone Labor Inc Switching device
US3211857A (en) * 1962-03-06 1965-10-12 English Electric Co Ltd Polarized electromagnetic relay
US3233062A (en) * 1964-11-16 1966-02-01 Int Standard Electric Corp Sealed contact device with ferrite elements
US3843944A (en) * 1972-03-22 1974-10-22 Siemens Ag Electromagnetic relay and free armature therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1220521B (de) * 1962-10-25 1966-07-07 Arthur Klemt Polarisiertes Relais

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473353A (en) * 1944-07-03 1949-06-14 Mallory & Co Inc P R High-frequency vibrator mechanism
US2677027A (en) * 1952-08-04 1954-04-27 North American Aviation Inc Chopper
US2734962A (en) * 1956-02-14 Switch
US2848579A (en) * 1956-05-01 1958-08-19 Bristol Company Polarized relay

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH299081A (fr) * 1952-05-28 1954-05-31 El Re Ma S A Per Lo Sfruttamen Relais électrique.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734962A (en) * 1956-02-14 Switch
US2473353A (en) * 1944-07-03 1949-06-14 Mallory & Co Inc P R High-frequency vibrator mechanism
US2677027A (en) * 1952-08-04 1954-04-27 North American Aviation Inc Chopper
US2848579A (en) * 1956-05-01 1958-08-19 Bristol Company Polarized relay

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048677A (en) * 1961-03-31 1962-08-07 Bell Telephone Labor Inc Switching device
US3211857A (en) * 1962-03-06 1965-10-12 English Electric Co Ltd Polarized electromagnetic relay
US3233062A (en) * 1964-11-16 1966-02-01 Int Standard Electric Corp Sealed contact device with ferrite elements
US3843944A (en) * 1972-03-22 1974-10-22 Siemens Ag Electromagnetic relay and free armature therefor

Also Published As

Publication number Publication date
NL101479C (de)
NL220151A (de)
CH362436A (de) 1962-06-15
GB843728A (en) 1960-08-10
FR1201773A (fr) 1960-01-06
DE1102283B (de) 1961-03-16
BE570505A (de)

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