US3781727A - Electromagnetic switching device - Google Patents

Electromagnetic switching device Download PDF

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Publication number
US3781727A
US3781727A US00147317A US3781727DA US3781727A US 3781727 A US3781727 A US 3781727A US 00147317 A US00147317 A US 00147317A US 3781727D A US3781727D A US 3781727DA US 3781727 A US3781727 A US 3781727A
Authority
US
United States
Prior art keywords
housing
terminal
chamber
switching device
frame
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
US00147317A
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English (en)
Inventor
F Pollmann
G Wossner
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens 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
Priority claimed from DE19702027137 external-priority patent/DE2027137C/de
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3781727A publication Critical patent/US3781727A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/026—Details concerning isolation between driving and switching circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
    • H01H50/22—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil wherein the magnetic circuit is substantially closed

Definitions

  • An electromagnetic switching device has a housing comprising two housing parts for accommodating contact and terminal parts and a magnetic system.
  • a separate switching chamber is formed in the housing and has outer wall portions integrally formed with the housing parts to provide form-locking support for frame clamps of the device.
  • the invention relates to a switching device. More particularly, the invention relates to an electromagnetic switching device having a housing comprising two housing parts for accommodating contact and terminal parts and a magnetic system.
  • the contact parts, the contact slides and the contact bridges are embedded in the housing part and, after the assembly of the switching device, such components are supported in form-locking relation or are guided in the housing parts.
  • the magnetic system may also be inserted in the housing parts in the known device.
  • the fixed contact parts with the terminal contacts of the support are inserted, at least partly, from outside the housing into slots of the housing parts and are held in the walls of the housing by downwardly bent flaps.
  • the terminal contacts are free outside the housing and the fastening arrange ment utilizing bent flaps is relatively expensive.
  • An object of the invention is to provide a switching device having a specific separation between the parts rated according to the electrical function and the parts which must be adjusted in accordance with optical and mechanical requirements.
  • An object of the invention is to provide a switching device which overcomes the disadvantages of known similar types of switching device.
  • An object of the invention is to provide a switching device of simple structure which functions with efficiency, effectiveness and reliability.
  • An object of the invention is to provide a switching device having a switching chamber utilizing a material having good qualities with respect to its electrical function but which is generally not utilized because of its mechanical characteristics.
  • Another object of the invention is to provide a switching device in which the individual components may be installed with facility, rapidity and simplicity, due to a switching chamber which is readily accessible from all sides.
  • Another object of the invention is to provide a switching device having open clamps in which the clamping screws are prevented from being lost in transit.
  • Another object of the invention is to provide a switching device which prevents tightening of the clamping screws due to jarring during transit.
  • Another object of the invention is to provide a switching device wherein the MP conductor for the winding connection may be inserted through an additional terminal screw.
  • Still another object of the invention is to provide a switching device which permits facile removal of the winding and facile opening of the housing parts without damage to the terminal wires.
  • the aforedescribed specific separation between the electrically rated parts and the mechanically rated parts is provided by a separate switching chamber formed in the housing.
  • an electromagnetic switching device having a housing comprising two housing parts for accommodating contact and terminal parts and a magnetic system comprises a separate switching chamber formed in the housing.
  • the separate switching chamber has outer wall portions integrally formed with the housing parts to provide form-locking support for frame clamps.
  • a frame having internally threaded bores formed there in frame clamps are provided.
  • Each of the frame clamps has a terminal clamping screw having a head and an externally threaded conical end threadedly engaging a corresponding one of the bores.
  • the separate switching chamber is spaced from the housing parts by a length distance corresponding to the height of a frame clamp plus the length of the terminal clamping screw less the conical end of the terminal clamping screw to accommodate the frame clamps.
  • the housing has openings formed therethrough each located over the head of a corresponding one of the terminal clamping screws and each of a cross-sectional area smaller than the cross-sectional area of a terminal clamping screw.
  • the head of each of the terminal clamping screws has a recess formed therein to accommodate a test plug.
  • Winding leads extend between the separate switching chamber and the housing parts.
  • the magnetic system has a winding connected at each end to a winding lead.
  • Each of the housing parts has a projection formed therein on the inside of the housing and each of the winding leads is of bar-shape having an opening formed therein in engagement with a corresponding one of the projections.
  • a winding lead has a bent end extending through the housing to outside the device.
  • An additional terminal clamping screw is affixed to the bent end of the winding lead.
  • the winding has ends, and contact springs are in electrical connection at one end with a corresponding end of the winding and in electrical connection at the other end with a corresponding winding lead.
  • Each of the contact springs is in force-locking connection between a corresponding end of the winding and a corresponding winding lead.
  • the switching device of the invention permits the separate switching chamber to comprise high quality material having good qualities with respect to its electrical function, but which could not be utilized for the mechanical factors required for the housing.
  • the optical qualtiies need not be considered when selecting the material for the switching chamber, since said switching chamber is covered. Since the separate switching chamber is readily accessible from all sides, and also transversely to the closing direction of both housing parts, the individual components may be installed in the switching device with simplicity, rapidity and facility. All the openings required for mounting the switching device are closed by the housing parts after their assembly.
  • the frame clamps are supported in form-locking arrangement in a particularly simple manner when the outer wall portions of the separate switching chamber are integrally formed with the housing parts.
  • the arrangement of the clamping screws permits the switching device to be delivered with open clamps while preventing the loss of said screws in transit.
  • the clamping screws are also prevented from tightening during jarring of the switching device in transit, since a clamping screw would have to lift the frame in order to accomplish this.
  • the head of each clamping screw is provided with a recess formed therein to accommodate a test plug, since the terminal parts are almost completely covered.
  • the extending of the winding lead for the winding of the magnetic system between the separate switching chamber and the housing parts permits the insertion of the terminal clamping screws in the same height or level.
  • the tight bearing of the housing parts against the separate switching chamber permits projections formed inside the housing to engage openings formed in the bar-shaped winding leads, thereby permitting a bent end of a winding lead to be guided through the wall of a housing part and to be provided with an additional terminal clamping screw. This permits the MP conductor for the winding connection to be pushed or pulled through at the additional terminal clamping screw.
  • the provision of a contact spring for the winding of the magnetic system in force-locking contact with the winding lead when a housing part is in an assembled condition permits the removal and exchange of the winding with rapidity, facility and simplicity without damage to the terminal wires.
  • FIG. 1 is a lateral section through a contact path of an embodiment of the switching device of the invention
  • FIG. 2 is a lateral section through the center of the embodiment of the switching device of FIG. 1, in which the winding connections are shown;
  • FIG. 3 is across-sectional view of the embodiment of I the switching device of FIG. 1.
  • the electromagnetic switching device of the invention comprises two housing parts 1 and 2.
  • the housing parts 1 and 2 form the housing of the switching device which housing accommodates a magnetic system comprising a stationary magnetic component 3, a movable magnetic component 4 and a winding 5, as shown in FIG. 1.
  • the housing part 1 has two projections6a and 6b formed on the inside thereof and the housing parts 2 has two projections 6'a and 6' formed on the inside thereof.
  • the projections 6a, 6b, 6'a and 6'b support the winding 5.
  • the movable magnetic component 4 is connected to a contact bridge carrier 7 which supports contact bridges 8.
  • the contact bridges 8 cooperate with fixed contacts 9 and 9'.
  • Contact pressure springs 10 provide contact pressure and are located in the contact bridge carrier 7.
  • the fixed contact parts 9 and 9' are connected to electrical conductors from outside the switching device via frame clamps 11.
  • the frame clamps l1 accommodate the free ends 12 and 12' of the fixed contact parts 9 and 9', respectively.
  • Each frame clamp 11 has a terminal clamping screw 13.
  • the frame clamps 11 are separated from the actual switching chambers which enclose the contact bridges 8 and the fixed contact parts 9 and 9.
  • the separation of the frame clamp 11 from the switching chambers is provided, in accordance with the present invention, by a separate switching chamber 14.
  • the separate switch- -ing chamber 14 may also be utilized to support and guide frame clamps 1 1. In order to accomplish this, the
  • each frame clamp 11 is guided on the outer wall portions 15 and 16 when the terminal clamping screw 13 is loosened, or turned so that it moves upward.
  • Each of the housing parts 1 and 2 has an opening 17 formed therethrough over the head of each terminal clamping screw 13.
  • Each of the openings 17 has a cross-sectional area smaller than the cross-sectional area of a terminal clamping screw 13. The opening 17 is to permit the introduction of a screw driver to turn the terminal clamping screw 13 in either direction.
  • Each terminal clamping screw 13 has a conical end 18 adjacent the opening in the frame 20.
  • the terminal clamping screws 13 are maintained in the housing without loss.
  • the movability of each terminal clamping screw transverse to its longitudinal axis is so limited by the separate switching chamber 14 and the corresponding housing part '1 or 2 that the terminal clamping screws are prevented from slipping out of the housing via corresponding openings 19 formed in the frame 20 at their conical ends 18.
  • each terminal clamping screw 13 is externally threaded and threadedly engages internal threading provided in each of the openings 19 when the screw is turned in the proper direction. It is therefore only necessary, at the place of mounting, to insert outside insulated conductors into corresponding ones of insertion funnels 21, a plurality of which are provided in the housing parts 1 and 2. When an outside electric conductor is inserted into a corresponding insertion funnel 21, the corresponding frame 20 is lifted due to the pulling up of the corresponding terminal clamping screw 13, as shown on the left-hand side of FIG. 1.
  • Each of the terminal clamping screws 13 has a recess 22 formed in its head, as shown in FIG. 1, to accommodate a test plug.
  • the ends 12 of .the fixed contact part 9 brace against inwardly extending projections 23 formed in the housing parts 1 and 2.
  • the ends 12 of the fixed contact part 9 abut the separate switching chamber 14 in grooves, recesses, or the like, 24 formed in said separate switching chamber, thereby providing a forcelocking support.
  • FIG. 2 shows winding leads 25 and 25 extending between the separate switching chamber 14 and the housing parts 1 and 2, respectively.
  • Each winding lead 25 and 25' comprises a bar-shaped electrical conductor having an opening 25a and 25'a, respectively, formed therein.
  • Inwardly extending projections 26 and 26' of the housing parts 1 and 2, respectively, are in engagement with corresponding openings 25a and 25 'a of the winding leads 25 and 25. This permits the shifting of the winding leads 2S and 25.
  • the winding lead 25 has a bent end 27 which extends out through the wall of the housing part 2.
  • the bent end 27 of the winding lead 25' is provided with a threaded boss 28 having an additional terminal clamping screw 29 in threaded engagement therein.
  • the additional terminal clamping screw 29 permits the insertion of an outside PM conductor for connecting the magnetic winding 5.
  • the electrical connections between the ends of the winding 5 and the corresponding winding leads and 25' are provided by springs and 30", respectively.
  • the springs 30 and 30 are of leaf type, and pass through electrically insulating material 30a and 30a, respectively, on the outside of the winding 5.
  • Each of the springs 30 and 30' is in electrical connection at one end with an end of the winding 5 and in electrical connection at the other end with the corresponding winding lead 25 or 25'.
  • the bridge contact carrier 7 When the switching device 7 of the invention is mounted, the bridge contact carrier 7 is first led through a guide opening 31 in the separate switching chamber 14 and is connected to the movable magnetic component 4.
  • the fixed contact parts 9 and 9' are affixed in a simple manner, either before or after the positioning of the bridge contact member, depending upon whether a closing or opening contact is present.
  • the fixed contact parts 9 and 9 are merely inserted into corresponding ones of grooves 32 formed in the separate switching chamber 14.
  • the frames 20 are guided across the ends 12 and 12 of the fixed contact parts 9 and 9, respectively (FIG. 1), or bent parts 33 and 33 of the winding leads 25 and 25 respectively, engage said frames and are moved so that openings formed in said bent parts engage projections 26a and 26'a, respectively, of the housing parts 1 and 2.
  • the terminal clamping screws 13 are then provided.
  • the housing parts 1 and 2 may be closed on each other.
  • the electromagnetic switching device is thus of very simple structure and is completely free from impairment in function due to such simplicity of structure.
  • gears 34 may be provided at said separate switching chamber, as shown in FIG. 3. The gears 34 engage the housing parts 1 and 2 in force-locking relation.
  • An electromagnetic switching device of the type having contact and terminal parts and a magnetic system comprising a housing having two housing halves. means integrally formed on said housing defining a separate switch chamber within said housing, frame clamp means disposed in said chamber for receiving and clamping electrical conductors, said chamber defining means having support means for mounting and movably supporting said frame clamp means within said chamber to provide for said frame clamp means effecting a clamping action with said electrical conductors, said frame clamp means comprising frame clamps having internally threaded bores formed therein, each of the frame clamps having a terminal clamping screw disposed within said chamber and having a head and an externally threaded conical and threaded engaging a corresponding one of said bores, said chamber defining means comprising internal wall means spaced from an opposite end wall of said housing by a length distance corresponding to the height of a frame clamp plus the length of the terminal clamping screw less the conical end of the terminal clamping screw, said housing having openings formed therethrough each located over the head of a corresponding one of the terminal clamp

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Contacts (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Seal Device For Vehicle (AREA)
US00147317A 1970-06-03 1971-05-27 Electromagnetic switching device Expired - Lifetime US3781727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702027137 DE2027137C (de) 1970-06-03 Schaltgerät, insbesondere elektromagnetisches Schaltgerät

Publications (1)

Publication Number Publication Date
US3781727A true US3781727A (en) 1973-12-25

Family

ID=5772857

Family Applications (1)

Application Number Title Priority Date Filing Date
US00147317A Expired - Lifetime US3781727A (en) 1970-06-03 1971-05-27 Electromagnetic switching device

Country Status (6)

Country Link
US (1) US3781727A (enrdf_load_stackoverflow)
JP (1) JPS5528174B1 (enrdf_load_stackoverflow)
CH (1) CH524242A (enrdf_load_stackoverflow)
ES (1) ES197259Y (enrdf_load_stackoverflow)
FR (1) FR2094001B1 (enrdf_load_stackoverflow)
SE (1) SE379888B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2461782A1 (de) * 1974-01-03 1975-07-10 Telemecanique Electrique Elektrisches schaltgeraet
US3902144A (en) * 1973-04-26 1975-08-26 Siemens Ag Resilient mounting arrangement for the non-movable magnetic member of an electromagnetic switching apparatus
US4117428A (en) * 1976-05-18 1978-09-26 Siemens Aktiengesellschaft Electro-magnetic switching apparatus having electrically separated contact elements
US4117429A (en) * 1976-05-18 1978-09-26 Siemens Aktiengesellschaft Electromagnetic switching apparatus
DE3220040A1 (de) * 1981-05-28 1983-04-14 Mitsubishi Denki K.K., Tokyo Elektromagnetisches schaltschuetz
US20050068132A1 (en) * 2003-09-29 2005-03-31 Marquardt Terry L. System and method for connecting a removable coil to fixed coil terminals
WO2005034152A3 (en) * 2003-09-29 2005-08-18 Siemens Energy & Automat System and method for connecting a removable coil to fixed coil terminals
US20160071669A1 (en) * 2013-05-31 2016-03-10 Te Connectivity Germany Gmbh Arrangement for an Electrical Circuit Element With a Seal Configuration
US11742166B2 (en) * 2018-02-07 2023-08-29 Tdk Electronics Ag Switching device for switching an electrical load

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2214957B1 (enrdf_load_stackoverflow) * 1973-01-19 1976-05-14 Telemecanique Electrique
DE2732963C2 (de) * 1977-07-21 1982-10-21 Starkstrom Gummersbach GmbH, 5277 Marienheide Schütz

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908784A (en) * 1956-12-24 1959-10-13 Cutler Hammer Inc Electric control device
US3102935A (en) * 1959-09-25 1963-09-03 Oerlikon Engineering Company Electromagnetic air contactor
US3194920A (en) * 1964-06-23 1965-07-13 Ward Leonard Electric Co Electrical contactor
US3209096A (en) * 1962-05-24 1965-09-28 Reiner Plug-in relay construction
US3230330A (en) * 1963-04-09 1966-01-18 Robertshaw Controls Co Electrical relay with panel and terminal plug
US3238329A (en) * 1963-04-19 1966-03-01 Clark Controller Co Electric switch apparatus
US3320561A (en) * 1964-03-18 1967-05-16 Honeywell Inc Electrical contactor with novel terminal means
US3409851A (en) * 1966-11-03 1968-11-05 Ward Leonard Electric Co Multipole electromagnetic contactor
US3519967A (en) * 1967-11-30 1970-07-07 Westinghouse Electric Corp Relay with modular contact assembly
US3534195A (en) * 1969-01-27 1970-10-13 Gen Electric Circuit breaker with novel terminal strap

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1731201A (en) * 1928-05-19 1929-10-08 Condit Electrical Mfg Corp Air-break electric switch and operating electromagnet therefor
FR1530293A (fr) * 1966-07-07 1968-06-21 Omron Tateisi Electronics Co Relais électromagnétique
DE1902940B2 (de) * 1968-01-23 1971-11-25 Kraftschluessig betaetigter kontakt eines elektromagnetischen schaltschuetzes
JPS4915312A (enrdf_load_stackoverflow) * 1972-05-18 1974-02-09

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908784A (en) * 1956-12-24 1959-10-13 Cutler Hammer Inc Electric control device
US3102935A (en) * 1959-09-25 1963-09-03 Oerlikon Engineering Company Electromagnetic air contactor
US3209096A (en) * 1962-05-24 1965-09-28 Reiner Plug-in relay construction
US3230330A (en) * 1963-04-09 1966-01-18 Robertshaw Controls Co Electrical relay with panel and terminal plug
US3238329A (en) * 1963-04-19 1966-03-01 Clark Controller Co Electric switch apparatus
US3320561A (en) * 1964-03-18 1967-05-16 Honeywell Inc Electrical contactor with novel terminal means
US3194920A (en) * 1964-06-23 1965-07-13 Ward Leonard Electric Co Electrical contactor
US3409851A (en) * 1966-11-03 1968-11-05 Ward Leonard Electric Co Multipole electromagnetic contactor
US3519967A (en) * 1967-11-30 1970-07-07 Westinghouse Electric Corp Relay with modular contact assembly
US3534195A (en) * 1969-01-27 1970-10-13 Gen Electric Circuit breaker with novel terminal strap

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902144A (en) * 1973-04-26 1975-08-26 Siemens Ag Resilient mounting arrangement for the non-movable magnetic member of an electromagnetic switching apparatus
DE2461782A1 (de) * 1974-01-03 1975-07-10 Telemecanique Electrique Elektrisches schaltgeraet
US3964006A (en) * 1974-01-03 1976-06-15 La Telemecanique Electrique Electrical apparatus
US4117428A (en) * 1976-05-18 1978-09-26 Siemens Aktiengesellschaft Electro-magnetic switching apparatus having electrically separated contact elements
US4117429A (en) * 1976-05-18 1978-09-26 Siemens Aktiengesellschaft Electromagnetic switching apparatus
DE3220040A1 (de) * 1981-05-28 1983-04-14 Mitsubishi Denki K.K., Tokyo Elektromagnetisches schaltschuetz
US20050068132A1 (en) * 2003-09-29 2005-03-31 Marquardt Terry L. System and method for connecting a removable coil to fixed coil terminals
WO2005034152A3 (en) * 2003-09-29 2005-08-18 Siemens Energy & Automat System and method for connecting a removable coil to fixed coil terminals
US20160071669A1 (en) * 2013-05-31 2016-03-10 Te Connectivity Germany Gmbh Arrangement for an Electrical Circuit Element With a Seal Configuration
US9812274B2 (en) * 2013-05-31 2017-11-07 Te Connectivity Germany Gmbh Arrangement for an electrical switch element with a seal configuration
US11742166B2 (en) * 2018-02-07 2023-08-29 Tdk Electronics Ag Switching device for switching an electrical load

Also Published As

Publication number Publication date
FR2094001B1 (enrdf_load_stackoverflow) 1974-10-11
JPS5528174B1 (enrdf_load_stackoverflow) 1980-07-25
FR2094001A1 (enrdf_load_stackoverflow) 1972-02-04
DE2027137A1 (enrdf_load_stackoverflow) 1972-05-25
ES197259Y (es) 1975-09-01
SE379888B (enrdf_load_stackoverflow) 1975-10-20
DE2027137B2 (de) 1972-05-25
ES197259U (es) 1975-04-01
CH524242A (de) 1972-06-15

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