US3878491A - Electrical switching apparatus having the armature and contact bridge carrier flexibly coupled together - Google Patents

Electrical switching apparatus having the armature and contact bridge carrier flexibly coupled together Download PDF

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Publication number
US3878491A
US3878491A US283426A US28342672A US3878491A US 3878491 A US3878491 A US 3878491A US 283426 A US283426 A US 283426A US 28342672 A US28342672 A US 28342672A US 3878491 A US3878491 A US 3878491A
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United States
Prior art keywords
armature
carrier
bore
pin
force
Prior art date
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Expired - Lifetime
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US283426A
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English (en)
Inventor
Gunther Rauter
Gunther Bohlke
Gunther Weissberger
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
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Publication of US3878491A publication Critical patent/US3878491A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/645—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection
    • H01H50/646—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection intermediate part being a blade spring

Definitions

  • ABSTRACT Switch gear having an armature and contact bridge carrier flexibly coupled together, with means to prevent relative flexing of the two unless the force on the contact bridge carrier exceeds a certain minimum.
  • the coupling is by means of a pin inserted with play through a bore in the armature and connected to the carrier at its ends. Springs between armature and carrier tend to force them apart to bear on a flat protuberance located in the armature bore. This forces the armature and carrier to a static position as the flat protuberance is disposed on the interior surface of the bore, until the force of the armature overcomes the spring, at which point the linkage can flex.
  • the invention of this application relates to electrical switch gearv in particular, the invention pertains to structure for coupling the armature to the contact bridge carrier. This structure holds the two elements rigid when armature force is below a minimum and allows flexibility at the coupling only when the minimum force is exceeded.
  • the present invention relates to electrical switch gear such as is used to open and close electrical circuits carrying high power.
  • Such circuits typically include a movable armature with a power means, such as an electromagnet, for moving the armature, and a contact bridge carrier coupled to the armature.
  • the contact bridge carrier bears thereon a conductive member which, when the carrier is moved by the armature, closes a circuit between two electrical contacts.
  • Both the armature and carrier are often mounted slidably in guides.
  • the contact bridge carrier and armature are flexibly coupled.
  • the armature is joined to the contact bridge carrier by means of a round pin protruding through a bore in the armature and extending into a portion of the contact bridge carrier
  • a leaf spring is interposed in a recess in the contact bridge carrier between the top central portion of the armature and the contact bridge carrier.
  • the bore through the armature is sufficiently large that the pin extending through it has substantial *play.
  • This structure dictates that the armature, at least in the plane perpendicular to the axis of the round pin, is free to rotate without lirriit over a large arc. This freedom of motion is present at all times.
  • the present invention overcomes the disadvantages of the prior art mechanisms discussed hereinabove by the provision of a unique apparatus for coupling the armature of the switch gear to the contact bridge carrier in such a way that the benefits of both rigid coupling and a flexible coupling are obtained.
  • the armature is coupled to the contact bridge carrier by means of a pin inserted through a bore in the armature and into slideably mounted bushings which are connected to the contact bridge carrier.
  • the armature bore is sufficiently larger than the cross sectional area of the pin to allow for substantial play of the pin.
  • interposed between the side of the pin facing the contact bridge car rier and the interior of the armature bore is a flat protuberance having a flat contact surface thereon.
  • 1 ilh w likely to rietionit is a alien min LlllL't idles nmst l l (ht ol igeti l'inlilt' 'Jlltl tt G lt the rim trig parts against tlnir respec iie ll itltn and also re time near ot' lllL contacts and contact lnidge carrier.
  • Elt J is a side tie [.liaetl in scetn n showing the enti odinent of i -l t i r Ell is 2 vznpizi reptesi l t lt iii the i-emliitp n the .irtitatnre and contact hr nge tnrriei at tr ptotted against the ii switch em inven ecu: Appiirattr tn accord-J!
  • t ontue'i bridge carrier the upper regi ns thcreot ontitct hridgr; r'ri ext nds no 5 ts :ti'il p hill; shown tiring oinliied twin the snitch gear a .4 i; a front Lleittlllrlt rien til the switch gear ot E and has provision tor carrying a contact bridge (not shown it
  • the contact hridge is made of conductive material and is positioned with respect to a pair of contacts (also not shown) such that, when the contact i bridge carrier 5 moves up and down vertically on the sliding bushings the circuit between the contacts may he opened and closed in response thereto by the selectire placement or" the contact bridge between the contacts.
  • the contact bridge carrier 5 is moved by means of a movable armature 4 which extends downwardly into a magnet
  • An electrical :oil 3 is disposed about magnet ,2 such than when cur; ent is passed through coil 3, magnet 2 prm ides energy to apply force to armature 4. Armature it fitted in sliding fashion into magnet 2.
  • Armature 4 is coupled to contact bridge carrier 5 in accordance with a unique structure
  • the armature is rmided with a bore 8 extending therethrough.
  • Bushings l2 are also provided with bores corresponding to armature bore 8 such that, when a pin, such as is shown at ii, is inserted through the armature bore, it may also be correspondingly inserted into the bores in bushings :2.
  • l he erosssee ons of both armature bore 8 and pin ii are preterahly rectangular in shape. the dimensions of the cross-scctional area of bore 8 being considerably larger than those otpin 6, in order to allow for substantial play between pin 6 and armature 4.
  • Biasing means 9 in this case shown as compression springs are fastened to and interposed between contact bridge carrier 5 and the top of armature 4. It can be seen that springs 9 tend to separate the armature and contact bridge carrier. but are prevented from completely doing so by the connection of pin 6 between armature 4 to bushings 12 which are connected to contact bridge carrier 5.
  • Such an apparatus as is illustrated in FIG i (and also in FIGS. LZ4) is capable ofopcratively coupling the armature and contact hridgc carrier in a unique fashion it is evident that. as long as no upward force is applied to armature 4 h magnet 2. the compressive force of the springs '9 tending to separate the armature and contact hridge carrier maintains th two elements in a lttilt" and stable position. This is true because the top surface bore it rests tirmly on and is pressed against the tin contact surlaee 7 of protuberance 19.
  • the coupling of this apparatus is thus capable of providing this additional compliance when it is needed, without the necessity, as in the prior art, for tolerating flexibility of these two elements during the entire stroke of the apparatus.
  • FIG. 5 An example is shown in FIG. 5. In that figure the flat protuberance, rather than being located on pin 6. is located on the interior upper surface of bore 8, as indicated at 20.
  • the protuberance is shown as being formed by a steel pad which is attached to pin 6.
  • the steel pad need not have a perfectly flat upper surface, but may alternately have an undulating surface having coplanar peaks, such as is shown in FIG. 7 at 16.
  • FIGS. 8 and 9 there is shown a steel pad having a generally U-shaped cross-section and having legs 17 which are disposed to wrap around at least three sides of pin 6.
  • This latter embodiment provides a steel pad member which, while removable from pin 6, is also easily securable thereto in a firm fashion. Making the protuberance front a separate steel pad affords the flexibility of imparting physical properties to the protuberance which differ from those of the pin.
  • the spring providing biasing of the armature against the contact bridge carrier applies its force to the central point of the armature. This location of the force application point tends to exaggerate, rather than limit the tendency of the armature and contact bridge carrier to bend relatively at their coupling.
  • the springs are placed in such a fashion that the position of stable equilibrium tends to be that position at which the armature and contact bridge carrier are linearly aligned.
  • the springs 9 are four in number, and are disposed in a rectangular pattern.
  • the points of application of the force of springs 9 are transversely displaced from the center ofthe planar contact surface of protuberance 10 in such a way that the force points and the center of surface 7 define the corners of con gruent triangles which are symmetrically disposed about the center of surface 7.
  • FIG. 10 shows a static force diagram which plots the torques generated by the armature force and the opposing spring forces as a function of inclination or bending between the armature and contact bridge car rier.
  • the linear characterisitic designated as 18 represents the torque generated by the armature force, which increases as a function of the inclination of the elements.
  • the torque generated by the spring, which opposes this armature torque is designated as 19.
  • the torque generated by the springs is, due to the fact that the springs are under constant compression, of a uniform value as long as the armature force remains below a certain level.
  • the springs also generate more force as indicated on the characteristic 19 of FIG. [0.
  • a contact bridge carrier mounted for motion in the one direction in a guide means, and being flexibly connected to the armature, the improvement comprising:
  • said armature having a bore therethrough, and said means for preventing flexing comprising an elongated pin having a crosssection of smaller dimensions than that of said bore, and having length greater than said bore, said pin being thereby insertable with play through said bore, a protuberance disposable in the region of the interior side of said bore nearest said carrier, said protuberance having a plurality of coplanar points at its extremities, means for connecting the ends of said pin to said carrier when said pin is inserted into said bore with its ends protruding therefrom, and bias means interposed between said carrier and said armature to resiliently apply force to said armature and carrier to force said armature and carrier apart, whereby, when said pin is inserted through said bore and its ends connected to said carrier, said armature and carrier are prevented from flexing when armature force is
  • connection between the ends of said pin and said carrier comprises plastie bushings.
  • said guide means comprises:

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Linear Motors (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Railway Tracks (AREA)
  • Contacts (AREA)
US283426A 1971-08-25 1972-08-24 Electrical switching apparatus having the armature and contact bridge carrier flexibly coupled together Expired - Lifetime US3878491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2142464A DE2142464C3 (de) 1971-08-25 1971-08-25 Anordnung zur gelenkigen Verbindung des Ankers eines elektromagnetischen Schaltgerätes mit dem Kontaktbrückenträger

Publications (1)

Publication Number Publication Date
US3878491A true US3878491A (en) 1975-04-15

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ID=5817674

Family Applications (1)

Application Number Title Priority Date Filing Date
US283426A Expired - Lifetime US3878491A (en) 1971-08-25 1972-08-24 Electrical switching apparatus having the armature and contact bridge carrier flexibly coupled together

Country Status (13)

Country Link
US (1) US3878491A (de)
JP (1) JPS581495B2 (de)
AT (1) AT319375B (de)
BR (1) BR7205851D0 (de)
CA (1) CA979955A (de)
CH (1) CH551689A (de)
DE (1) DE2142464C3 (de)
ES (1) ES406071A1 (de)
FR (1) FR2150518B1 (de)
GB (1) GB1399940A (de)
IT (1) IT964220B (de)
SE (1) SE386004B (de)
SU (1) SU512724A3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056799A (en) * 1974-12-05 1977-11-01 Siemens Aktiengesellschaft Housing for securing a damping compression spring in an electromagnetic switching apparatus
US4528535A (en) * 1982-06-19 1985-07-09 Starkstrom Gummersbach Gmbh Electromagnetic switching device
US4918414A (en) * 1988-09-05 1990-04-17 Siemens Aktiengesellschaft Electromagnetic switching device
CN105934809A (zh) * 2014-05-20 2016-09-07 富士电机机器制御株式会社 电磁接触器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0375798U (de) * 1989-11-21 1991-07-30
CH682112A5 (de) * 1991-05-29 1993-07-15 Sprecher & Schuh Ag
CH691880A5 (de) 1995-04-20 2001-11-15 Rockwell Automation Ag Elektromagnetisches Schaltgerät, insbesondere Schütz.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1936098A (en) * 1930-03-01 1933-11-21 Diamond Electrical Mfg Company Magnetic switch
US2434096A (en) * 1943-11-17 1948-01-06 Gen Electric Shockproof electromagnet with armature
US3060355A (en) * 1960-05-20 1962-10-23 Westinghouse Electric Corp Relay magnet suspension
US3453571A (en) * 1967-08-24 1969-07-01 Cutler Hammer Inc Electromagnetic relay with convertible switch contact modules
US3663908A (en) * 1970-09-11 1972-05-16 Honeywell Inc Relay magnetic frame and armature arrangement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1936098A (en) * 1930-03-01 1933-11-21 Diamond Electrical Mfg Company Magnetic switch
US2434096A (en) * 1943-11-17 1948-01-06 Gen Electric Shockproof electromagnet with armature
US3060355A (en) * 1960-05-20 1962-10-23 Westinghouse Electric Corp Relay magnet suspension
US3453571A (en) * 1967-08-24 1969-07-01 Cutler Hammer Inc Electromagnetic relay with convertible switch contact modules
US3663908A (en) * 1970-09-11 1972-05-16 Honeywell Inc Relay magnetic frame and armature arrangement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056799A (en) * 1974-12-05 1977-11-01 Siemens Aktiengesellschaft Housing for securing a damping compression spring in an electromagnetic switching apparatus
US4528535A (en) * 1982-06-19 1985-07-09 Starkstrom Gummersbach Gmbh Electromagnetic switching device
US4918414A (en) * 1988-09-05 1990-04-17 Siemens Aktiengesellschaft Electromagnetic switching device
CN105934809A (zh) * 2014-05-20 2016-09-07 富士电机机器制御株式会社 电磁接触器
CN105934809B (zh) * 2014-05-20 2018-04-27 富士电机机器制御株式会社 电磁接触器
US10269518B2 (en) 2014-05-20 2019-04-23 Fuji Electric Fa Components & Systems Co., Ltd. Electromagnetic contactor

Also Published As

Publication number Publication date
ES406071A1 (es) 1975-08-16
JPS4831466A (de) 1973-04-25
JPS581495B2 (ja) 1983-01-11
CA979955A (en) 1975-12-16
SU512724A3 (ru) 1976-04-30
FR2150518B1 (de) 1977-04-01
SE386004B (sv) 1976-07-26
DE2142464C3 (de) 1974-11-28
IT964220B (it) 1974-01-21
AT319375B (de) 1974-12-27
GB1399940A (en) 1975-07-02
CH551689A (de) 1974-07-15
DE2142464A1 (de) 1973-03-01
BR7205851D0 (pt) 1973-06-28
DE2142464B2 (de) 1974-04-25
FR2150518A1 (de) 1973-04-06

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