US2761929A - Polarised electromagnetic relays - Google Patents

Polarised electromagnetic relays Download PDF

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Publication number
US2761929A
US2761929A US278862A US27886252A US2761929A US 2761929 A US2761929 A US 2761929A US 278862 A US278862 A US 278862A US 27886252 A US27886252 A US 27886252A US 2761929 A US2761929 A US 2761929A
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United States
Prior art keywords
magnetic
framework
relay
supports
magnet
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Expired - Lifetime
Application number
US278862A
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English (en)
Inventor
Mclellan Harry Ernest Sidney
Blaxhall Kenneth William
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International Standard Electric Corp
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International Standard Electric Corp
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Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
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Publication of US2761929A publication Critical patent/US2761929A/en
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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
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • H01H51/2245—Armature inside coil
    • H01H51/2254—Contact forms part of armature

Definitions

  • the invention relates to electromagnetic relay such as are used in telegraph circuits and telecommunication circuits generally.
  • the magnetic pole pieces were carried in magnetic supports projecting upwards from the magnetic framework and the permanent magnet was mounted below the pole pieces and coat-fused to the magnetic support.
  • the permanent magnet is mounted on the top of the pole supports and is held there by its r'nagne'tic "flux.
  • Two recesses are provided in that face of the magnet which is to rest on the pole supports and slightly projecting ends of the set screws which hold the pole pieces in position in the supports engage these recesses so that the magnet cannot be made to slide 011 but must be plucked off. This avoids impairments of the magnetic properties of the magnet such as is likely to occur if the magnet is removed from the magnetic circuit by sliding.
  • a further modification of previous practice lies in the arrangements for holding the spool carrying the winding in position.
  • these spools commonly made of a plastic moulded insulating material have been held in position by means of long screws passing through the Patented Sept. 4, 1956 2 end flanges and into the main framework of the relay.
  • the spools of the present relay are formed with substantially rectangular flanges at the ends of a tubular barrel which carries the operating windings and through the hollow center of which the armature passes. This spool fits in between the two limbs of the framework and a strong spring mounted on the non-magnetic main framework of the relay presses it firmly against one limb of the magnetic framework.
  • Suitable slots are cut in the rectangular flanges to engage the spring and the magnetic framework.
  • the invention therefore provides a polarised electromagnetic relay comprising abase on which is mounted a magnetic framework, two magnetic supports firmly attached to said framework, two magnetic pole pieces mounted in said supports and so positioned that there "is a small gap between them within which the free end of the relay armature is able to move, a permanent magnet in the form of a short thick straight bar placed across those ends, of said magnetic supports which are remote from the base, the magnetic flux of said permanent magnet serving to retain it in position.
  • Fig. 1 shows a side view of the relay
  • Fig. 2 shows a side view of the magnetic circuit only of the relay.
  • Fig. 3 shows an end view of the magnetic circuit
  • Fig. 4 shows a plan view of the relay with the spool for carrying the windings in position
  • Fig. 5 shows a side view of the spool and Fig. 6 shows an end view of the spool.
  • Fig. 1 there is shown the main framework 11 of the relay which is of non magnetic material. Within the mainframework there are shown the magnetic framework 2 and the armature 3. The magnetic framework 2 and armature 3 are better shown in Fig. 2.
  • the magnetic framework 2 consists of two two parallel L-shaped members 2a and 2b (best seen in Fig. 4-) joined adjacent the ends of the short arms thereof by screw f6 and bushes 17 to form a U-shaped structure.
  • the spool 4 carrying the windings 5 of the relay is mounted inside the frameworks as shown in Fig. 1 by means which will be described later and the armature passes through the hollow interior 23 in the spool.
  • the magnetic framework 2 carries two magnetic pole supports 6 made of magnetizable material and shown in Figs.
  • the armature 3 is of the laminated kind described in said Patent No. 641,117 in which the main body oi the armature is formed of laminae of magnetisable material but in which there is a very narrow gap 12a bridged by means of a thin flexible metallic strip 12 which forms a hinge.
  • Fig. 1 there is shown one of the two pillars 13 carrying the fixed contacts 13:: which pass through the pillars 13 and are adjustable by a knurled knob 14. When the contacts have been correctly adjusted they are held in position by means of the set screw 15 which is also provided with a small knurled knob.
  • the arrangement of the contacts is conventional, the armature being provided with the usual anti-chatter springs 3a carrying the moving contacts 31;.
  • Figs. 4, and 6 show the novel method of mounting the spool in the relay.
  • Fig. 4 there is shown the main framework 1 of the relay and also the magnetic framework 2.
  • the spool 4 is shown in position but without any operating windings.
  • the armature 3 passes through the hollow interior of the spool and is fixed to the magnetic framework by means of a bolt 16 which passes through both limbs 2a and 21) at rear portion 2c of the magnetic framework and finally screws into the side 1b of the main framework of the relay.
  • Two bushes 17 of magnetisable material surround the bolt 16.
  • the armature 3 is provided with a laminated end 30 having holes therein through which the bolt 16 passes and the armature is thus held in position when the bolt is tightened up. It can be seen that the armature can very readily be drawn out if the bolt 16 is first removed.
  • the spool 4 is made of a strong insulating material and each end flange 13 is substantially square but is provided with a notch 19 and a cut away corner 21 in Fig. 4 there is shown a spring 21 firmly fixed to the side in of main framework 1 of the relay by a screw 22 threaded through said side.
  • the spring 21 is pressed against the framework 1 by hand when the spool can be put into position with the cut away corners 20 resting on the limb 2a of the magnetic frame- Work and the notches 19 will then be engaged by the spring 21 and the spool will be firmly held.
  • the armature 3 is passed through the hollow interior 23 and fixed in position as explained above by means of the bolt 16 and the bushes 17.
  • a polarized electromagnetic relay comprising a mounting base member of non-magnetic material, a magnetic framework attached to said base member, a pair of spaced supports made of magnetizable material having their lower ends fixed perpendicularly to said framework, a permanent bar magnet bridging the upper ends of said spaced supports and held in position solely by magnetic atttraction, a pair of magnetic pole pieces each mounted on a different one of said supports intermediate the ends thereof and spaced in opposed relationship to each other to define a magnetic gap therebetween, an operating winding, means to mount said winding on said framework, an armature comprising two portions, means to mount a first portion of said armature on said framework in return flux relation with said pole pieces and in electromagnetic relationship with said winding, the second portion of said armature disposed within said gap and trans versely thereof and utilization means under control of said armature.
  • a polarized elcctro-magnctic relay as claimed in claim 1 in which said pole pieces are threaded through apertures in said supports and are held in position by set screws the tops of which project above the upper ends of said supports, said bar magnet being provided with a pair of cooperating shallow recesses adapted to register with the projecting tops of said screws.
  • a polarized electromagnetic relay as claimed in claim 3 wherein said resilient element has two ends and said winding comprises a pair of spool flanges mounted at either end thereof, each end of said resilient element extending from said one arm to contact a differcnt one of said spool flanges, each flange having profiled portions adapted to accommodate an end of said resilient element.
  • a polarized electro-magnetic relay comprising a mounting member, a pair of spaced, parallel L-shapcd magnetic framework members attached to said mounting member, a pair of spaced supports made of magnetizable material, each having their first ends mounted at an extrernity of different of the long arms of said L-shaped members and, perpendicularly thereto a pair of opposed magnetic pole pieces each mounted on a different one of said supports intermediate the ends thereof and adapted to define a magnetic gap therebetween, a hollow operating winding, means to mount said winding on said framework, an armature, comprising two end portions and an intermediate portion, said intermediate portion disposed through the hollow of said winding and having a first end portion thereof removably mounted on the short arm of said L-shaped framework, a pair of contacts mounted on the other end portion of said armature, a pair of fixed contacts attached to said mounting member and adapted to cooperate with said first pair of contacts, said intermediate portion extending within said gap and transversely thereof, a straight, permanent bar magnet having

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Linear Motors (AREA)
  • Electromagnets (AREA)
US278862A 1951-04-03 1952-03-27 Polarised electromagnetic relays Expired - Lifetime US2761929A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB306177X 1951-04-03

Publications (1)

Publication Number Publication Date
US2761929A true US2761929A (en) 1956-09-04

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ID=10310473

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Application Number Title Priority Date Filing Date
US278862A Expired - Lifetime US2761929A (en) 1951-04-03 1952-03-27 Polarised electromagnetic relays

Country Status (5)

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US (1) US2761929A (en(2012))
BE (1) BE510385A (en(2012))
CH (1) CH306177A (en(2012))
GB (1) GB678660A (en(2012))
NL (2) NL82709C (en(2012))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2882461A (en) * 1954-09-29 1959-04-14 Barber Colman Co Relay armature mounting
US3002057A (en) * 1956-03-29 1961-09-26 Vigren Sten Daniel Polarized electromagnetic device
US3234345A (en) * 1960-04-11 1966-02-08 Rupert Evan Howard Carpenter Electromagnetic relay having novel field pieces and a novel coil bobbin

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE386419C (de) * 1922-08-01 1923-12-20 Siemens & Halske Akt Ges Polarisiertes Gleichstrom-Rueckstromrelais
US1680667A (en) * 1922-10-03 1928-08-14 Western Electric Co Electromagnetic device
GB491893A (en) * 1937-03-12 1938-09-12 Standard Telephones Cables Ltd Improvements in or relating to telegraph relays
US2153641A (en) * 1938-03-08 1939-04-11 Bell Telephone Labor Inc Polarized relay
US2203727A (en) * 1937-06-19 1940-06-11 Teleregister Corp Contact structure
US2400262A (en) * 1943-06-24 1946-05-14 Magnavox Co Electric impulse generator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE386419C (de) * 1922-08-01 1923-12-20 Siemens & Halske Akt Ges Polarisiertes Gleichstrom-Rueckstromrelais
US1680667A (en) * 1922-10-03 1928-08-14 Western Electric Co Electromagnetic device
GB491893A (en) * 1937-03-12 1938-09-12 Standard Telephones Cables Ltd Improvements in or relating to telegraph relays
US2203727A (en) * 1937-06-19 1940-06-11 Teleregister Corp Contact structure
US2153641A (en) * 1938-03-08 1939-04-11 Bell Telephone Labor Inc Polarized relay
US2400262A (en) * 1943-06-24 1946-05-14 Magnavox Co Electric impulse generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2882461A (en) * 1954-09-29 1959-04-14 Barber Colman Co Relay armature mounting
US3002057A (en) * 1956-03-29 1961-09-26 Vigren Sten Daniel Polarized electromagnetic device
US3234345A (en) * 1960-04-11 1966-02-08 Rupert Evan Howard Carpenter Electromagnetic relay having novel field pieces and a novel coil bobbin

Also Published As

Publication number Publication date
GB678660A (en) 1952-09-03
NL82709C (en(2012))
NL168567B (nl)
CH306177A (fr) 1955-03-31
BE510385A (en(2012))

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