US3766503A - Electromagnetic switching apparatus - Google Patents

Electromagnetic switching apparatus Download PDF

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Publication number
US3766503A
US3766503A US00280430A US3766503DA US3766503A US 3766503 A US3766503 A US 3766503A US 00280430 A US00280430 A US 00280430A US 3766503D A US3766503D A US 3766503DA US 3766503 A US3766503 A US 3766503A
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US
United States
Prior art keywords
switching apparatus
housing
unit
connectors
excitation
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
US00280430A
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English (en)
Inventor
F Pollmann
S Seidel
G Weissberger
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Siemens AG
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Siemens AG
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Filing date
Publication date
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • H01H50/041—Details concerning assembly of relays
    • H01H50/045—Details particular to contactors
    • 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 apparatus which incorporates a housing and an excitation unit that includes a magnet part and an excitation coil.
  • the unit is held in the housing so that it can be swung-out; this permits replacement of the coil without taking the entire apparatus apart.
  • the housing is preferably provided with an opening that is covered with a springloaded lid.
  • the invention relates to an electromagnetic switching apparatus having an excitation unit including a magnet part and an excitation coil which is held on the housing, mom a base-plateof the apparatus.
  • the excitation unit can be swung-out from the housing to facilibase-plate, the iron core is tensioned via fastening elements which grasp the coil body.
  • These fastening elements can be, .for example, arms configured as hooklike claws. Afterthese fastening elements are loosened, the coil body and the iron core-can be mutually separated.
  • a switching device wherein the unit, composed of the switching and nonswitching magnet parts along with the coil, is guided laterally into the protective housing in the manner of a drawer.
  • This construction of a switching device is usually used only for the smaller switching devices, because'here there is nodirect coupling between the switching magnet part and the contact bridge carrier. The more'or less firm holding of the nonswitching magnet part required with the larger switching devices is not ,present in this'construction of switching devices.
  • the electromagnetic switching apparatus incorporates an excitation unit which includes a magnet part and an excitation coil.
  • the unit is held on the housing or on the base-plate so that it can be swung-out of the housing.
  • Articulation means are provided for swinging the unit through a range between a first position adjacent the base of the housing and a second position outside the housing.
  • the swingingmotion may hereby be combined with a pushing motion.
  • the articulation means can include pivot means securely holding the excitation unit to the housing so as to be rotatable through the range from one of the positions to the other one of the positions.
  • the magnet part can not be removed from the housing, so that no special means are needed to avoid interchanging the pole surfaces with respect to the switching magnet part.
  • the excitation coil will not fall down from the magnet part if the pivot range is limited by a stop on the housing.
  • the swing-out opening For mounting on a framework, and for cases in which access to the excitation coil in the installed apparatus is required, it is advantageous for the swing-out opening to be provided in the bottom of the switching device. An entry of dirt or dust through the swing-out opening is avoided when the swing-out opening is closable by a lid springloaded in the closing direction thereof. Work on the opened switching device is facilitated if this lid can be latched in its opened position.
  • the pivotable mount can be made with practically no extra cost as to space when the pivot axis lies perpendicularly to the longitudinal direction of the magnet .part. -In this connection, it is also advantageous for the pivot axis to be situated outside the magnet part, because on the one hand, the pivot mounting arrangement will then not magnetically influence the magnet part, and on the other hand, the space already available -'for the excitation coil can be effectively used.
  • a simple configuration of the pivotable mount is obtained by providing a pin to define the pivot axis. The pin can extend through the cover members projecting out from the magnet part and be held on the housing. This pin can be pushed through eye'mounts formed on the housing or on the base-plate. As already mentioned, these mounts are formed in the space provided for the excitation coil.
  • the separation of the elastic support from the more or less rigid support of the excitation coil can be obtained by holding the magnet part elastically on the pin and by providing the excitation coil with formations that abut on the pin.
  • the excitation coil is thus decoupled from possible vibrations of the magnet part.
  • the side opposite the pin it is advantageous for the side opposite the pin to be held against the housing with intermediate elastic layers.
  • each resilient connector has portions of respective widths; this assures that at least one of the resilient connector portions will always be in electrical contact.
  • the asymmetry is advantageously selected to accommodate the frequencies that occur.
  • the excitation unit may be held in its swing-in position in the housing on the side thereof opposite the pivot axis by means of a plate threadably mounted on the base with an elastic mat interposed.
  • a plate threadably mounted on the base with an elastic mat interposed it has been found to be advantageous to hold the excitation unit in its swing-in position by at least one bolt that can be pushed in or rotated in.
  • the bolt need be pulled out only a certain amount to release the excitation unit and it is therefore not necessary for the bolt to be removed from the housing.
  • the bolts can be provided with a screw-thread; however, the bolts can be pushed in more rapidly if they can be locked in the pushed-in or pushed-out positions. It is possibleto do without a threaded hole in the housing if the bolt engages nuts inserted in the housing.
  • the rings so that they can be snapped into place affords the advantage that they remain in the desired position when the arresting bolts are displaced. It is particularly advantageous if the rings have at their ends an annular collar interrupted at its periphery. The collar then constitutes a plurality of catching portions.
  • FIG. 2 is a sectional plan view of the switching apparatus of FIG. 1 taken along line II II of FIG. 1.
  • FIG. 3 is a sectional view taken through the side of the switching apparatus lying opposite the pivot axis illustrating threadably engaging arresting'bolts for holding the excitation unit in position in the housing.
  • FIG. 4 is a sectional view of the connectors for the excitation coil of the excitation unit.
  • FIGS. 5 and 6 illustrate respective views of a switching apparatus wherein the thread engaging direction of the arresting bolts is in the same direction as the longitudinal axis of the magnet part of the excitation unit.
  • FIG. 7 illustrates an embodiment wherein the arresting bolts engage and are arrested by threaded nuts disposed in respective recesses of the housing.
  • FIG. 8 illustrates the housing of the switching apparatus provided with arresting bolts equipped with springloaded pivot levers.
  • FIG. 9 illustrates an embodiment wherein the arresting bolts are spring-loaded and in which the pivot axis lies parallel to the longitudinal axis of the magnet part of the excitation unit.
  • FIG. 10 is a sectional view taken along the line X--X of FIG. 9.
  • FIG. 11 is a sectional view of the switching apparatus taken along line XI-XI of FIG. 9.
  • FIGS. 12 and 13 illustrate respective embodiments of the excitation coil equipped with disconnectable coil connection means.
  • the housing 1 of the switching apparatus contains armaturemeans comprising a movable magnet part 2 which is guided over the contact bridge carrier 3 so as to be displaceable.
  • the housing 1 has an opening 4 at its base.
  • the excitation unit comprises the excitation coil 12 and magnet part 5 and can include ancillary means to which the magnet part 5 is connected.
  • the ancillary means includes cover members 6 made of sheet metal to which the magnet part 5 is connected.
  • the ancillary means also includes elastic means in the form of snap-in elastic rings 7 which are held in the cover members to elastically hold the magnet part.
  • the elastic rings accommodatearticulation means comprising pivot means in the form of a pin 8 that defines the pivotaxis.
  • the magnet part is thus elastically held on the pivot pin.
  • the pin 8 is in turn held in eye mounts 9 of the housing 1.
  • the pin 8 is secured against shifting by retaining rings 10.
  • the articulation means enables the excitation unit to be swung through a range between a first position adjacent the base of the housing and a second position (shown in phantom outline) outside the housing. This makes the coil easily accessible for replacement.
  • the two-part excitation coil 12 is placed onto the legs 11 of the magnet part 5 and joined into a unit by a plate 13. A positive union is advantageously obtained by thermoplastic bonding patches 14.
  • the excitation coil 12 is provided with shaped parts 15 which bear respectively against the pivot pin 8 and the bolts 16. At its side facing away from the pin, the excitation coil 12 is equipped with elastic intermediate layers 17 which bear against support means in the form of shaped elements 18 of the housing 1. The excitation coil 12 is thus decoupled with respect to vibrations from the magnet part 5.
  • excitation coil connection means are provided and can comprise resilient connectors 19 connected to the coil body of the excitation coil 12.
  • the connectors 19 rest against fixed connection parts 20 when the unit is swung into the housing to its operating position.
  • These fixed connection parts 20 are held in form-locking fashion in a part 21 made of insulating material which in turn is held in the housing 1.
  • the resilient connectors 19 are slitasymmetrically to form portions 22 and 23 having respective widths such that always one of the two parts still bears against the connector part 20 when disturbing frequencies occur.
  • the coil connections are also swung-out when the magnet system is swung-out so that the coil can be removed from the housing with its connectors which are preferably in theform of screw-type connectors.
  • this would mean that the connector part 20 and the part 21 of insulating material would be fixedly attached to the coil body of the excitation coil 12, and the cut-outs in the housing for the part 21 would be made such that the part 21 could be swung into the interior of the housing.
  • FIG. 1 with FIG. 2 also shows holding means for engaging and holding the excitation unit in its first position.
  • the holding means can be in the form of at least one bolt mounted in the housing so as to be movable between in and out positions for engaging and disengaging the above mentioned ancillary means.
  • FIG. 2 illustrates arresting bolts 16 which can be provided separately for each side and are in the form of threaded bolts which threadably engage a tapped bore 24 (FIG. 3) in the housing 1.
  • the bolts 16 further have an extension 25 which rotates into elastic rings 26 held in the cover members 6.
  • the lid 50 is connected with the housing 1 of the switching apparatus by means of hinge-like connection 52 and is spring-loaded by a resilient member in the form of spring 51.
  • the hinge-like connection 52 is made as a groove into which the lid slips in its opened position. When the lid is closed, it slides out of this groove.
  • the groove is a form of latching means because it effects a latching of the lid in its open position.
  • the movable magnet part 5 rests against a stop 49 of the housing 1 in the open position so that the lid 50 is not loaded by the magnet part 5.
  • the stop 49 can be viewed as being a subsidiary feature of the articulation means and serves to limit the swing-out movement of the excitation unit thereby defining its second position.
  • the spring 51 is hooked on the one hand to the lid 50, and on the other hand to the spring clamps 53, which take the place of the elastic intermediate layers 17 and/or the shaped elements 18 of the housing 1.
  • the cover members 6 are provided with bent-out parts 27, so that the direction of rotation for the arresting screws 16 lies in the longitudinal direction of the magnet part 5.
  • nuts 29 are installed in recesses 28 as shown in FIG. 7.
  • threaded bolts 30 are screwed into the nuts after placement of a lock-washer 31.
  • the left side of FIG. 7 shows the tightened position of the arresting bolt 30 which bears by its head portion 32 against the wall portion 33 of the housing 1 and thus presses the lockwasher 31 between the wall part 33 and the nut 29.
  • the right-hand side of FIG. 7 shows the arresting bolt 30 in the untightened position.
  • FIG. 8 the bolt is provided with a bore 34 into which engages a spring-loaded pivoting lever 35.
  • the lever 35 has an appendage 36 with which it can be brought into engagement with the housing in both its inserted and also in its withdrawn position.
  • the pivotable lever 35 is spring-loaded by a spring 37.
  • the different arresting positions are once more shown at the left and right sides, respectively of FIG. 8.
  • FIG. 8 is a configuration alternate to that of the continuous pivot pin.
  • two short bolts 38 are provided and are held by pins 39 in their inserted position.
  • FIG. 9 illustrates a further embodiment of the switching device of the invention wherein the arresting bolts are spring-loaded and in which the pivot shaft is disposed parallel to the longitudinal axis of the magnet part of the excitation unit.
  • FIGS. and 11 show still further embodiments which incorporate different configurations for the arresting bolts. More specifically, FIG. 10 shows a configuration wherein the one spring 40 bears directly against an elastic jacket 42 of the arresting bolt 41. This form of construction has the advantage that both the stationary and also the displaceable bolts can be made similar. In FIG. 11 the stationary bolts are held in their position by a sleeve 43 which is used instead of the spring 40.
  • FIG. 12 shows a coil connection which incorporates a resilient tongue 44 connected to connection part 20.
  • the resilient tongue 44 is in contact with the fixed contact part 45.
  • This fixed contact part 45 is held by the coil band of the coil and can, in addition, be made resilient at its free end.
  • a spiral spring 46 co-acts with the fixed connection part 20 and the electrical connection between the connection part 20 and the stationary contact part 45 at the excitation coil constitutes a small plate-like portion 47 and a current lead 48.
  • the mounting holes ofthe switching device are provided so that the excitation unit can also be swung-out when, for example, the apparatus is fastened to some apparatus, or to a framework, or upon a mount-plate having a rear cut-out. In such an instance, it is also possible to replace the coil even when the switching apparatus is built-in.
  • An electromagnetic switching apparatus comprising a housing having a surface portion defining a mounting plane for the switching apparatus, armature means mounted so as to be movable with respect to the housing, an excitation unit comprising a magnet part and an excitation coil mounted thereon for generating an electromagnetic force to actuate said armature means, the force acting along a line of action transverse to said plane, and articulation means for swinging said unit through a range between a first position adjacent the base of said housing and a second position outside of said housing.
  • said articulation means comprising pivot means for securely holding said unit to said housing so as to be rotatable through said range from one of said positions to the other one of said positions.
  • said articulation means comprising a stop on said housing for limiting the swing-out movement of said unit thereby defining said second position.
  • said housing comprising a lid for covering said opening, and a resilient member connected to said lid for imparting a force thereto in a direction for opening the same.
  • said excitation unit comprising ancillary means joined to said magnet part for engaging said pivot means at a location beyond the region of said magnet part.
  • said pivot means being a pivot pin
  • said ancillary means comprising cover members made of sheet metal joined to and extending beyond said magnet part, said pivot pin extending through said cover members and being held in said housing.
  • said ancillary means comprising elastic means for elastically holding said magnet part on said pivot pin, and said excitation unit comprising shaped parts for supporting said excitation coil on said pivot bolt.
  • said elastic electrical connection from said excitation coil to a location on said housing when said excitation unit is in said first position saidconnection means including an insulating part mounted in said housing, first connectors mounted in said insulating part, and second connectors connected to said excitation coil and arranged thereon so as to be in contact with corresponding ones of said first connectors.
  • each of said resilient connector members being asymmetrically cut.
  • each of said resilient connector members being cut so as to form respective portions thereof having respective widths such that always one of said portions bears against the corresponding one of said fixed connector members when disturbing frequencies occur.
  • said excitation coil including a band at said contour, said second connectors being at least partially banded tight by said band.
  • the switching apparatus of claim 1 comprising holding means for engaging and holding said excitation unit in said first position.
  • said holding means comprising bolt means movable between in and out positions for engaging and disengaging said excitation unit, and means for locking said bolt means in each of said in and out positions.
  • the switching apparatus of claim 9 comprising holding means for engaging and holding said excitation unit in said first position, said holding means comprising at least one bolt mounted in said housing and movable between in and out positions for engaging the disengaging said ancillary means for holding said excitation unit in said first position.
  • said ancillary means comprising cover members made of sheet metal joined to said magnet part, said cover members having respective bent-out parts, and said holding means comprising a number of said bolts mounted in said housing and engaging corresponding ones of said bent-out parts.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US00280430A 1971-08-14 1972-08-14 Electromagnetic switching apparatus Expired - Lifetime US3766503A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2140807A DE2140807C3 (de) 1971-08-14 1971-08-14 Elektromagnetisches Schaltgerät, insbesondere Schütz mit herausschwenkbarem Schaltmagneten

Publications (1)

Publication Number Publication Date
US3766503A true US3766503A (en) 1973-10-16

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ID=5816762

Family Applications (1)

Application Number Title Priority Date Filing Date
US00280430A Expired - Lifetime US3766503A (en) 1971-08-14 1972-08-14 Electromagnetic switching apparatus

Country Status (9)

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US (1) US3766503A (de)
JP (1) JPS4827275A (de)
AT (1) AT312087B (de)
CA (1) CA977395A (de)
CH (1) CH547546A (de)
DE (1) DE2140807C3 (de)
FR (1) FR2149328B1 (de)
GB (1) GB1406661A (de)
SE (1) SE386003B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122388U (de) * 1974-03-22 1975-10-06
JPS5327186A (en) * 1976-08-26 1978-03-14 Daiou Seisakushiyo Kk Roller device for drilling paper sheet
JPS5914993Y2 (ja) * 1977-03-31 1984-05-02 株式会社明電舎 真空開閉装置
IT8553348V0 (it) * 1985-05-07 1985-05-07 Rele Finder Spa Rele elettromagnetico perfezionato
DD277998A1 (de) * 1988-12-12 1990-04-18 Oppach Schaltelektronik Wechselstromerregter schaltmagnet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439827A (en) * 1946-03-12 1948-04-20 Sterenbuch Nathan Coil
US2955238A (en) * 1956-10-25 1960-10-04 Cornell Dubilier Electric Electromagnetic coil
US2982890A (en) * 1959-07-10 1961-05-02 Furnas Electric Co Coil retaining structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439827A (en) * 1946-03-12 1948-04-20 Sterenbuch Nathan Coil
US2955238A (en) * 1956-10-25 1960-10-04 Cornell Dubilier Electric Electromagnetic coil
US2982890A (en) * 1959-07-10 1961-05-02 Furnas Electric Co Coil retaining structure

Also Published As

Publication number Publication date
AT312087B (de) 1973-12-10
GB1406661A (en) 1975-09-17
JPS4827275A (de) 1973-04-10
SE386003B (sv) 1976-07-26
DE2140807A1 (de) 1973-02-22
FR2149328A1 (de) 1973-03-30
CA977395A (en) 1975-11-04
CH547546A (de) 1974-03-29
DE2140807B2 (de) 1974-04-25
FR2149328B1 (de) 1975-03-14
DE2140807C3 (de) 1974-11-28

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