US2569281A - Contact mechanism for automatic circuit breakers and similar electrical switchgear - Google Patents

Contact mechanism for automatic circuit breakers and similar electrical switchgear Download PDF

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Publication number
US2569281A
US2569281A US43206A US4320648A US2569281A US 2569281 A US2569281 A US 2569281A US 43206 A US43206 A US 43206A US 4320648 A US4320648 A US 4320648A US 2569281 A US2569281 A US 2569281A
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United States
Prior art keywords
contacts
contact mechanism
circuit breakers
magnet
circuit
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Expired - Lifetime
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US43206A
Inventor
Besag Ernst
Hill Walter Edward
Wintle Thomas Daniel Guy
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.)
JA Crabtree and Co Ltd
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JA Crabtree and Co Ltd
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10H—PRODUCTION OF ACETYLENE BY WET METHODS
    • C10H13/00—Acetylene gas generation with combined dipping and drop-by-drop system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/50—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts

Definitions

  • This invention relates to electromagnetically operated switches, and is particularly concerned adapted for closing the coil circuit of the magnet to cause attraction of an armature, means associated with the armature retaining the contacts in position after release of the button.
  • the improved arrangement provides mechanism not only for actuating additional interlocking or signalling circuits and so on, but also for acting as a fourth pole or holding on device for the magnet after the coil has been energised.
  • Figure 1 is a central vertical section.
  • Figure 2 is a section on the line II-II of Figure 1.
  • Figure 3 is a section on the line IIIIII of Figure 1.
  • Figure 4 is a perspective view, with parts removed, of the arrangement shown in Figure 1.
  • Figure 5 is a section on the line V-V of Figure 1.
  • the contact mechanism comprises a small insulating carrier a adapted to be removably mounted by screws b on a box 0, which supports the coil 0 for the magnet 11 and which contains the mounting means for the traverse e of the armature f.
  • a fiat metal plate h has an insulating knob is secured on its front end protruding from the carrier a, and this knob is is engageable by the stem g of the start button g of the switch.
  • the plate h has an upwardly extending lug h for engagement by a nose e on the armature traverse e.
  • the plate It is guidingly mounted at its front end in a groove m in the carrier a, this groove being enlarged to receive the knob is and a helical compression spring n, which spring acts to i press the plate h forwardly.
  • the plate h extends through an opening in a partition n of the carrier a into a contact chamber, and has two contact strips 0, o loosely and transversely arranged on a reduced portion 1 of the said plate.
  • the contacts 0, o are maintained against shoulders onthe plate h by a helical spring p disposed around the reduced neck r of said plate.
  • a helical spring p disposed around the reduced neck r of said plate.
  • the contact chamber there are arranged four terminal pillars, the pair s of which is normally engaged by one strip 0, while the other pair s is bridged by the other contact 0 when the plate his operated by the button g.
  • one set of contacts s is made when the button 9 is pressed inwards for operating the coil circuit to attract the armature f. At the same time the contacts s which may be in an interlocking or signal circuit, are broken. This operation causes the attraction of the armature 1, so that the nose e on the traverse e engages the plate to retain the contacts in position after release of the push button.
  • a separate, normally closed push button (not shown), constitutes the stop button and is included in the holding circuit. When pushed, this stop button breaks the holding circuit, whereupon springs, such as those shown at e in Figure 1 of our copending application Serial No.
  • the contact chamber is stepped as indicated at tin Figures 1 and 4 of the accompanying drawings, so that both pairs of terminals u, u for the pillars s, s are accessible from the front at diiferent levels.
  • the stepped formation also affords creepage paths of extended length.
  • An electromagnetic switch for making and breaking a main circuit and an auxiliary circuit
  • armature attracted to and held by said magnet upon energization of the coil circuit thereof; spaced sets of stationary contacts, one set connected to the coil circuit of said magnet and the other set connected to an auxiliary circuit; a reciprocating member; means for reciprocating said member; sets of contacts mounted on said member and disposed between the spaced sets of stationary contacts and spaced on said member a lesser distance than the spacing of the said sets of stationary contacts, one set of the contacts mounted on said member adapted to make and break the set of stationary contacts in the coil circuit of said magnet to control the main circuit, and the other set of contacts mounted on said member adapted to make and break the set of stationary contacts in an auxiliary circuit to control said auxiliary circuit, the lesser spacing between the sets of contacts on said member permitting one set of stationary contacts to be broken prior to the making of the other set of stationary contacts; and means associated with said armature for retaining the one set of contacts on said member in contact with the set of stationary contacts in the coil circuit of the magnet when said coil circuit is energized by movement of said reciprocating member.
  • An electromagnetic switch as defined in claim 1 in which the reciprocating member has a knob thereon, and in which a push button is associated with said knob to move said reciproeating member in a direction to close the coil circuit to energize the magnet and to break the set of stationary contacts in the auxiliary circuit.
  • An electromagnetic switch as defined in claim 4 in which the spring and spaced contacts are located at one end of said reciprocating member, and a second compression sprin is disposed around the opposite end of said member and between a fixed stop and said member for moving said member and the contacts carried thereby in a direction opposite to that in which the member is moved to close the coil circuit of said magnet.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Push-Button Switches (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Railway Tracks (AREA)
  • Contacts (AREA)

Description

Filed Aug. 9' 48 CONTACT MECHANISM FOR AUTOMATIC CIRCUIT BREAKERS AND SIMILAR ELECTRICAL SWITCHGEAR Sheet l ttorn P 1951 E. BESAG ET AL ,569, 81
CONTACT MECHANISM FOR AUTOMATIC CIRCUIT BREAKERS AND SIMILAR ELECTRICAL SWITCHGEAR Filed Aug. 9, 1948 2 Sheets-Sheet 2 Inventors:
Wwi wwm a, 1M JLW 215M Allorneys Patented Sept. 25, 1951 CONTACT MECHANISM FOR AUTOMATIC CIRCUIT BREAKERS AND SIMILAR ELEC- TRICAL SWITCHGEAR Ernst Besag and Walter Edward Hill, Streetly,
' and Thomas Daniel Guy Wintle, Walsall, England, assignors to J. A. Crabtree & Co. Limited, Walsall, England, a British company Application August 9, 1948, Serial No. 43,206 In Great Britain August 14, 1947 Claims. 1
This invention relates to electromagnetically operated switches, and is particularly concerned adapted for closing the coil circuit of the magnet to cause attraction of an armature, means associated with the armature retaining the contacts in position after release of the button. The improved arrangement provides mechanism not only for actuating additional interlocking or signalling circuits and so on, but also for acting as a fourth pole or holding on device for the magnet after the coil has been energised.
In order to enable the invention to be readily understood, reference will now be made to the accompanying drawings illustrating, by way of example, one construction for carrying the invention into effect, in which drawings:
Figure 1 is a central vertical section.
Figure 2 is a section on the line II-II of Figure 1.
Figure 3 is a section on the line IIIIII of Figure 1.
Figure 4 is a perspective view, with parts removed, of the arrangement shown in Figure 1.
Figure 5 is a section on the line V-V of Figure 1.
Referring to the drawings, the contact mechanism comprises a small insulating carrier a adapted to be removably mounted by screws b on a box 0, which supports the coil 0 for the magnet 11 and which contains the mounting means for the traverse e of the armature f. A fiat metal plate h has an insulating knob is secured on its front end protruding from the carrier a, and this knob is is engageable by the stem g of the start button g of the switch. The plate h has an upwardly extending lug h for engagement by a nose e on the armature traverse e.
The plate It is guidingly mounted at its front end in a groove m in the carrier a, this groove being enlarged to receive the knob is and a helical compression spring n, which spring acts to i press the plate h forwardly. The plate h extends through an opening in a partition n of the carrier a into a contact chamber, and has two contact strips 0, o loosely and transversely arranged on a reduced portion 1 of the said plate.
The contacts 0, o are maintained against shoulders onthe plate h by a helical spring p disposed around the reduced neck r of said plate. In the contact chamber, there are arranged four terminal pillars, the pair s of which is normally engaged by one strip 0, while the other pair s is bridged by the other contact 0 when the plate his operated by the button g.
Thus one set of contacts s is made when the button 9 is pressed inwards for operating the coil circuit to attract the armature f. At the same time the contacts s which may be in an interlocking or signal circuit, are broken. This operation causes the attraction of the armature 1, so that the nose e on the traverse e engages the plate to retain the contacts in position after release of the push button. A separate, normally closed push button (not shown), constitutes the stop button and is included in the holding circuit. When pushed, this stop button breaks the holding circuit, whereupon springs, such as those shown at e in Figure 1 of our copending application Serial No. 43,496, filed August 10, 1948, which issued as Patent 2,565,468, on August 28, 1951, serve to move the armature f to the left as viewed in Figure 1 of the accompanying drawings. The spring n then presses the plate h into the position shown in Figure 1.
The contact chamber is stepped as indicated at tin Figures 1 and 4 of the accompanying drawings, so that both pairs of terminals u, u for the pillars s, s are accessible from the front at diiferent levels. The stepped formation also affords creepage paths of extended length.
Having thus described our invention, we claim:
1. An electromagnetic switch for making and breaking a main circuit and an auxiliary circuit,
comprising a magnet having a coil circuit; an
armature attracted to and held by said magnet upon energization of the coil circuit thereof; spaced sets of stationary contacts, one set connected to the coil circuit of said magnet and the other set connected to an auxiliary circuit; a reciprocating member; means for reciprocating said member; sets of contacts mounted on said member and disposed between the spaced sets of stationary contacts and spaced on said member a lesser distance than the spacing of the said sets of stationary contacts, one set of the contacts mounted on said member adapted to make and break the set of stationary contacts in the coil circuit of said magnet to control the main circuit, and the other set of contacts mounted on said member adapted to make and break the set of stationary contacts in an auxiliary circuit to control said auxiliary circuit, the lesser spacing between the sets of contacts on said member permitting one set of stationary contacts to be broken prior to the making of the other set of stationary contacts; and means associated with said armature for retaining the one set of contacts on said member in contact with the set of stationary contacts in the coil circuit of the magnet when said coil circuit is energized by movement of said reciprocating member.
2. An electromagnetic switch as defined in claim 1 in which the reciprocating member has a lug thereon engaged by a part moved by said armature when said armature is attracted by said magnet, whereby the one set of movable contacts is retained in contact with the set of stationary contacts in the coil circuit of said magnet when said magnet is energized by movement of said reciprocating member.
3. An electromagnetic switch as defined in claim 1 in which the reciprocating member has a knob thereon, and in which a push button is associated with said knob to move said reciproeating member in a direction to close the coil circuit to energize the magnet and to break the set of stationary contacts in the auxiliary circuit.
4. An electromagnetic switch as defined in claim 1 in which the spaced movable contacts on the reciprocating member are slidably mounted 4 thereon between spaced, fixed stops on said member with a compression spring on said member between said contacts urging said contacts against said stops.
5. An electromagnetic switch as defined in claim 4 in which the spring and spaced contacts are located at one end of said reciprocating member, and a second compression sprin is disposed around the opposite end of said member and between a fixed stop and said member for moving said member and the contacts carried thereby in a direction opposite to that in which the member is moved to close the coil circuit of said magnet.
ERNST BESAG.
WALTER EDWARD HILL.
THOMAS DANIEL GUY WINILE.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,100,382 Levison June 16, 1914 2,013,013 Van Valkenburg Sept. 3, 1935 2,043,879 Bentley June 9, 1936 2,049,747 Parsons Aug. 4, 1936 2,317,358 Campbell Apr. 27, 1943
US43206A 1947-08-14 1948-08-09 Contact mechanism for automatic circuit breakers and similar electrical switchgear Expired - Lifetime US2569281A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22580/47A GB633393A (en) 1947-08-14 1947-08-14 Improvements in and connected with electromagnetically operated switches

Publications (1)

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US2569281A true US2569281A (en) 1951-09-25

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US43206A Expired - Lifetime US2569281A (en) 1947-08-14 1948-08-09 Contact mechanism for automatic circuit breakers and similar electrical switchgear

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US (1) US2569281A (en)
BE (1) BE484372A (en)
DE (1) DE833066C (en)
FR (2) FR470307A (en)
GB (2) GB633393A (en)
NL (1) NL73567C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2892500A (en) * 1955-03-30 1959-06-30 Better Packages Inc Electrically controlled strip serving machine
EP0030651B1 (en) * 1979-12-05 1984-03-14 Siemens Aktiengesellschaft Electromagnetic switching device

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976366C (en) * 1951-08-03 1963-07-25 Licentia Gmbh Electrical contactor for high switching frequency
DE969622C (en) * 1952-11-13 1958-06-26 Kloeckner Moeller Elek Zitaets Arc chamber for multi-pole contactors
DE1039604B (en) * 1952-12-23 1958-09-25 Calor Emag Elektrizitaets Ag Electrical contactor, in particular oil contactor, in a housing with a cover
US2791659A (en) * 1953-08-06 1957-05-07 Allen Bradley Co Auxiliary contact switch
BE535469A (en) * 1954-02-15
DE1018511B (en) * 1954-10-11 1957-10-31 Siemens Ag Contactor or other electromagnetic switching device
US2866043A (en) * 1955-08-23 1958-12-23 Westinghouse Electric Corp Circuit breaker
DE1193133B (en) * 1956-08-31 1965-05-20 Rostone Corp Process for the production of insulating, rigid, self-supporting, shaped bodies with the effect of suppressing arcing in electrical equipment
DE1067914B (en) * 1956-10-26 1959-10-29 Weyer & Zander K G Luftschuetz with hinged anchor
DE1069736B (en) * 1957-07-19 1959-11-26
US2977438A (en) * 1959-06-29 1961-03-28 Morschel Franz Relay-contactor
DE1238979B (en) * 1960-07-01 1967-04-20 Licentia Gmbh Arc extinguishing chamber for switches with air-switching contacts
DE1257933B (en) * 1964-03-20 1968-01-04 Bbc Brown Boveri & Cie Electric circuit breaker
GB2246240B (en) * 1988-03-04 1992-10-07 Telemecanique Electrique Switching apparatus with contacts controllable by an electromagnet
FR2628260B1 (en) * 1988-03-04 1990-07-20 Telemecanique Electrique PROTECTIVE APPARATUS WITH CONTROLLERS CONTROLLABLE BY AN ELECTROMAGNET

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1100382A (en) * 1912-05-27 1914-06-16 Chicago Signal Company Signaling system.
US2013013A (en) * 1934-07-16 1935-09-03 Square D Co Automatic starter
US2043879A (en) * 1934-11-05 1936-06-09 Bentley Llewellyn William Electric cooking range
US2049747A (en) * 1933-12-19 1936-08-04 Cons Car Heating Co Inc Circuit controller
US2317358A (en) * 1941-06-07 1943-04-27 Webster Electric Co Inc Communication system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1100382A (en) * 1912-05-27 1914-06-16 Chicago Signal Company Signaling system.
US2049747A (en) * 1933-12-19 1936-08-04 Cons Car Heating Co Inc Circuit controller
US2013013A (en) * 1934-07-16 1935-09-03 Square D Co Automatic starter
US2043879A (en) * 1934-11-05 1936-06-09 Bentley Llewellyn William Electric cooking range
US2317358A (en) * 1941-06-07 1943-04-27 Webster Electric Co Inc Communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2892500A (en) * 1955-03-30 1959-06-30 Better Packages Inc Electrically controlled strip serving machine
EP0030651B1 (en) * 1979-12-05 1984-03-14 Siemens Aktiengesellschaft Electromagnetic switching device

Also Published As

Publication number Publication date
BE484372A (en)
GB633396A (en) 1949-12-12
DE833066C (en) 1952-03-03
FR970307A (en) 1951-01-03
FR470307A (en) 1914-09-05
GB633393A (en) 1949-12-12
NL73567C (en)

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