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US3182232A - Electromagnetic relays - Google Patents

Electromagnetic relays Download PDF

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Publication number
US3182232A
US3182232A US186100A US18610062A US3182232A US 3182232 A US3182232 A US 3182232A US 186100 A US186100 A US 186100A US 18610062 A US18610062 A US 18610062A US 3182232 A US3182232 A US 3182232A
Authority
US
United States
Prior art keywords
armature
magnetic
relay
flux
polepiece
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
US186100A
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English (en)
Inventor
Yule William Henry Drury
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3182232A publication Critical patent/US3182232A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/42—Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement

Definitions

  • an electromagnetic relay in which contact bounce is reduced by providing permanent magnetic means for holding back the armature of the relay in the unoperated position, the armature being primarily biased back by other means.
  • FIG. 1 is a side elevation of the relay, sectioned through a sealing cover,
  • FIG. 2 is a left hand end elevation of FIG. 1, sectioned through the cover.
  • FIG. 3 is a part sectional end elevation along the line AA' of FIG. 1,
  • FIG. 4 is a partly sectioned plan view of the armature and movable contact springs assembly.
  • FIG. 5 shows schematically the main magnetic circuit and arrangement of the armature and stationary contacts
  • FIGS. 6, 7, and 8 show the plan view, right hand end elevation, and side elevation respectively of a magnetic backstop for the relay.
  • the relay is enclosed in a metal cover 1 soldered to a stamped metal base 2 and in known manner subsequently sealed to avoid adverse effects of humidity and low air pressure on the relay.
  • the main magnetic circuit includes a bar-shaped core 3 of rectangular cross section and centrally recessed at each end.
  • a rightangled or L-shaped pole-piece 4 In the left-hand recess is attached a rightangled or L-shaped pole-piece 4, and in the right-hand recess is attached a right-angled or L-shaped polepiece 5, the polepieces 4 and 5 facing inwardly and being of different lengths.
  • a right-angled or L-shaped non-magnetic supporting piece 6 is also attached in the right hand recess.
  • the portions of the longer polepiece 4 and of the supporting piece 6 parallel to and spaced from the core 3 are rigidly attached to the base 2 by non-magnetic screws or studs 7 and 8 respectively, so that resonant vibration of the assembly is reduced to a minimum.
  • the supporting piece 6 may extend along the whole of the base 2, with the longer polepiece 4 resting on the support piece 6 and the screw 7 passing through both the polepiece 4 and the support 6.
  • the magnetic backstop 28 is positioned in the angle of the supporting piece 6.
  • the view of the magnetic backstop 28 shown in FIG. 1 corresponds to that shown in FIG. 8, and the line B-B on FIG. 7 corresponds to the width of the Supporting piece 6.
  • the magnetic backstop 28 consists of a block of magnetic iron 29 in which are set two small permanent mag- 3,182,232 Patented May 4, 1965 ICC nets 30.
  • the magnets 36 are made of the material known by the registered trademark Platinax.
  • the screw 8 passes through the base 2, the supporting piece 6, and into the threaded hole 31 in the magnetic backstop 28, thus securing the magnetic backstop 28 in position.
  • a Winding 9 may be wound directly onto the core 3, or prewound on a spool which is then slipped onto the core 3.
  • External electrical connections for the winding 9 are provided by connecting, as by soldering, the ends 10 of the winding 9 to separate terminating pins 11 sealed through and insulated from the base 2.
  • a flat armature 12 is pivoted about its central transverse axis on a pivot pin 13 between supports 14 formed by bent-up side extensions at the end of the longer polepiece 4.
  • the armature supports may be bent down from side extensions at the end of the shorter polepiece 5.
  • the pin 13 is slightly bowed before insertion so that it holds itself in position after insertion through the armature and its supports.
  • the armature 12 thus lies in a plane substantially parallel to the base 2, inside the longer polepiece 4 and outside the shorter polepiece 5.
  • the main magnetic flux path is along the longer polepiece 4, the armature supports 14, the pivot pin 13, the armature 12 and the shorter polepiece 5. There is negligible flux leakage across the relatively large air gap between the polepiece 4 and the armature 12.
  • the main magnetic circuit is in the shape of a C with its free ends oil-set in two spaced parallel planes and the centrally pivoted armature 12 in a parallel plane intermediate the two spaced planes.
  • washers 15 of non-magnetic material e.g., nickel silver, may be inserted therebetween.
  • the relay is provided with two sets of changeover contacts. As shown in FIGS. 3 and 4, two movable contact springs 16 are rigidly attached to the top face of the armature 12 by screws 17, or by rivets, and are sandwiched between insulating blocks 18 and 19 so as to be insulated from the armature 12 and from each other. The screws 17 bear on a clamp plate 20.
  • the armature and moving contact assembly is substantially symmetrical about the central pivot of the armature.
  • FIG. 4 is sectioned so as to clearly indicate the shape of the contact springs 16.
  • extension pieces 21 are bent up and locate in a corresponding recess in the insulating block 19, thus preventing any longitudinal movement of the contact springs 16.
  • Semi-circular recesses 22 in the inner edge of the contact springs 16 allow clearance for the shank of the screws 17, or rivets if used.
  • stationary contacts for co-operation with the movable contact springs 16 are provided by terminating pins 23 sealed through and insulated from the base 2, and made from contact material or capped at one end with suitable contact metal to form the stationary contacts 24.
  • the movable contact springs 16 may be bent down in the form shown in FIG. 1 or alternatively may be straight, in which case the terminating pins 23 must be extended upwards.
  • the resilience of the springs 16 is chosen to give satisfactory contact pressure and freedom from excessive bounce. In a miniature relay no separate contacts are provided on the springs 16 which are themselves made ansaaea 3 of a suitable resilient contact material. Separate contacts may of course, be provided if required.
  • the restoring springs 25 are made of a suitable resilient conducting material, such as Phosphor bronze, and thus function in addition as electrical connecting means to the movable contact springs 16.
  • the armature 12 is biased back in the unoperated position by the restoring springs 25, and the resilience of the contact springs 16 is chosen to give freedom from excessive contact bounce.
  • the small magnets 30 (FIGS. 6, 7, and 8) are positioned so that one has its N-pole, and the other has its S-pole, facing the underside of the armature 12'.
  • the block of magnetic iron 29 acts as a magnetic flux carrier so that the magnetic backstop 28 effectively constitutes a horseshoe permanent magnet.
  • the holding force on the armature is due to a magnetic flux path around the horseshoe magnet and across the width of the armature 12.
  • This magnetic flux path is substantially at right angles to the main magnetic flux path, through the armature which operates the relay.
  • the magnetic backstop 23 results in slight increase in the necessary operating current, it does not aifect the non-polarity of the relay.
  • the horseshoe magnet used to reduce contact bounce should be in the form of a backstop for the armature relay, as in the above described embodiment; a separate backstop might, of course, be used. Also the form of the horseshoe magnet in the above described embodiment is specifically for use in a non-polarized electromagnetic relay. Clearly,
  • a magnetic structure comprising a pair of salient poles, flux generating means associated with said structure, a balanced armature positioned between said poles in flux linking relationship therewith and operable between an operated and unoperated position in response to variations in magnetic flu generated by said flux generating means traversing the said armature, and magnetic damping apparatus disposed adjacent one end of said armature to urge the armature in its unoperated position by a second magnetic flux traversing said armature in a direction normal to the direction of the first said magnetic flux.
  • a non-polarized electromagnetic relay as set forth in claim 1 wherein the flux of the magnetic fields generated by said flux generating means and by said magnetic damping means are substantially independent of each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Rotary Pumps (AREA)
US186100A 1961-06-12 1962-04-09 Electromagnetic relays Expired - Lifetime US3182232A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21134/61A GB974085A (en) 1961-06-12 1961-06-12 Improvements in or relating to gear type pumps or motors

Publications (1)

Publication Number Publication Date
US3182232A true US3182232A (en) 1965-05-04

Family

ID=10157771

Family Applications (1)

Application Number Title Priority Date Filing Date
US186100A Expired - Lifetime US3182232A (en) 1961-06-12 1962-04-09 Electromagnetic relays

Country Status (6)

Country Link
US (1) US3182232A (de)
BE (1) BE618768R (de)
CH (1) CH399591A (de)
DE (1) DE279333C (de)
GB (2) GB915019A (de)
NL (1) NL279333A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2913106A1 (de) * 1978-04-17 1979-10-25 Int Standard Electric Corp Elektromagnetisches relais mit zwangsgefuehrten kontakten

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288683B (de) * 1963-08-21 1969-02-06 Hi G Inc Elektromagnetisches Relais
CN108194358A (zh) * 2018-02-08 2018-06-22 北京丰联奥睿科技有限公司 一种双偏心滚柱压缩机
CN108105086A (zh) * 2018-02-08 2018-06-01 北京丰联奥睿科技有限公司 一种双偏心滚柱泵

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915681A (en) * 1957-11-20 1959-12-01 Indiana Steel Products Co Magnet assemblies
US3013136A (en) * 1959-02-12 1961-12-12 Fligue Wladimir De Electromagnetic relay

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915681A (en) * 1957-11-20 1959-12-01 Indiana Steel Products Co Magnet assemblies
US3013136A (en) * 1959-02-12 1961-12-12 Fligue Wladimir De Electromagnetic relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2913106A1 (de) * 1978-04-17 1979-10-25 Int Standard Electric Corp Elektromagnetisches relais mit zwangsgefuehrten kontakten

Also Published As

Publication number Publication date
DE279333C (de)
BE618768R (fr) 1962-12-14
CH399591A (de) 1965-09-30
NL279333A (de)
GB915019A (en) 1963-01-09
GB974085A (en) 1964-11-04

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