US3064104A - Electrical interlock - Google Patents

Electrical interlock Download PDF

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Publication number
US3064104A
US3064104A US832220A US83222059A US3064104A US 3064104 A US3064104 A US 3064104A US 832220 A US832220 A US 832220A US 83222059 A US83222059 A US 83222059A US 3064104 A US3064104 A US 3064104A
Authority
US
United States
Prior art keywords
plunger
contact
housing
stationary
magnets
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
US832220A
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English (en)
Inventor
Bruce C Wells
Donald D Armstrong
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse 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
Priority to CA671520A priority Critical patent/CA671520A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US832220A priority patent/US3064104A/en
Priority to JP4962460U priority patent/JPS3621007Y1/ja
Application granted granted Critical
Publication of US3064104A publication Critical patent/US3064104A/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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • H01H11/0012—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches for converting normally open to normally closed switches and vice versa
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • This invention relates to electric switches and more particularly to interlock type contacts, and auxiliary switches, for use on an electromagnetic contactor to be actuated by the magnetic armature, or other actuating member, of such contactor.
  • Interlock contact devices are well known in the art wherein the contact arrangement is such that one and the same unit can operate as a make contact or as a break contact.
  • FIGURE 1 is a perspective view of the contact aractuator assembly all shown disassociated from the housing;
  • FIG. 2 is a showing of the invention from the side with the front half of the housing removed, and showing the interlock contacts arranged as a normally open switch;
  • FIG. 3 is a showing like FIG. 2 but with the contacts arranged as a normally closed switch;
  • FIG. 4 is a showing of the interlock on section line IV-IV of FIG. 2;
  • FIG. 5 is a showing of the interlock on section line VV of FIG. 2;
  • FIG. 6 is a showing of a portion of the interlock, the section being taken on line VI-VI of FIG. 2.
  • FIGS. 4, 5 and 6 are made on the.
  • the switching unit is shown enclosed in a housing comprising two identical moldings, or side members, 1 and 2 of insulating material.
  • Two iron pole pieces, or shoes, 3 and 5 are molded in member 1 and two iron pole pieces, or shoes, 4 and 6 are molded in side member 2.
  • the two side members 1 and 2 are provided with matching holes having recesses, at their outer ends so that eyelets, or hollow rivets, as HR may be used to rivet the parts together as shown in FIG. 4. Since the rivets are hollow, bolts may be inserted through the holes and any number of interlocks stacked together and rigidly mounted on the contactor with which the interlock coacts.
  • the two side members together are so shaped as to provide recesses for the relatively short cylindrical ceramic permanent magnets 7 and 8 of insulating material.
  • the ends of the magnets fit snugly up against the pole shoes and the arrange ent is such that like poles of the magnets are directed in opposite directions.
  • the pole shoes are fiat cylindrical members and are eccentrically disposed with reference to the magnets so that pole shoes 3 and 4 straddle the stationary contact 9 and pole shoes 5 and 6 straddle the stationary contact 10.
  • These contacts and 10 are silver buttons each fastened to a copper strap as the straps 11 and 12, respectively. Strap It is bent around magnet 7 and strap 12 is bent around magnet 3 to thus form are horns around each of the magnets. This construction aids in arc lengthening and thus in arc blow out and since each stationary contact has its own magnet and arc horn, two separate and independently functioning blowout structures, are provided.
  • the outer ends of the straps 11 and 12 are provided with the terminal screw arrangements l3 and 14, respectively.
  • the two members are so shaped to provide a square hole to slidably engage the squarein-section lower end of the plunger, or push rod 19.
  • the upper end of the rod is shaped as shown and fits through a matching opening in the housing. The plunger may thus be moved along its axis in the housing, but can not rotate about its axis.
  • the plunger has a frame shaped middle portion 20.
  • a contact member 15 is seated in the bottom end of the frame, and has two silver contact buttons 17 and 18 engageable with the stationary contact buttons 9 and 10, respectively, for electrically bridging the two contact straps 11 and 12.
  • contact member 15 is prevented from revolving relative to the plunger but can slide axially.
  • a positioning, or back-u member 21 is seated in the top end of the frame and is also axially movable in the frame.
  • the positioning member has sectors cut out at the edge so that it may also be angularly moved about the plunger axis through a selected angle. In FIGS. 1, 2 and 4, the positioning member is shown in its upper position with reference to the housing.
  • a helical compression spring 22 is disposed between the positioning member 21 and the contact 15 and biases them away from each other toward the respective axial sides of the frame 20 which thus act as stops.
  • Another helical compression spring 23 is disposed on the plunger between the bottom of a Well 24 in the housing and the cylindrical portion 25 of the plunger. In the assembled condition of the device the spring 22 is stronger than spring 23 at least when spring 22 is in the compressed condition as shown in FIG. 3.
  • the side members 1 and 2 at the upper boundaries of the side holes are provided with oppositely disposed notches 26 and 27 for receiving and retaining in position the outer rounded ends 28 and 29 of the back-up member.
  • the interlock is a normally open switch.
  • the side members 1 and 2 are provided with oppositely disposed lower notches 30 and 31.
  • the interlock is a normally closed switch as shown in FIG. 3.
  • the change-over is made by depressing 21 and moving it clock-wise, it seen from the top, until the ends fit into the notches. than in the showing in PEG. 2.
  • the interlock is turned around on the, contactor so that actuating of the contactor, not shown, operates the interlock by engaging the lower end of the plunger 19. i
  • interruption'of the circuit occurs simultaneously at 9 and 17, and 1t) and 18 and the arcs are rapidly Spring 23 will be more compressed moved along each arc horn by the permanent magnets and are rapidly extinguished; Since the arc horns extend to both sides of the, fixed contacts, interruption is independent of the current polarity. Further, since the magnets are mounted with the same poles directed in opposite directions, onearc blows toward and the other away from the push rod 19. Further, the kickout Spring 23 is hooded, that is, being disposed ina well with the cylindrical portion 25 closing the well, it is protected against the inward moving arc.
  • An electric switch comprising, a housing, a plunger slidably mounted in said housing, a spring biased elongated contact mounted transversely of the plunger on the plunger to move with movement of the plunger, a pair of stationary contacts mounted in the housing, one stationary contact'being disposed at one side of the plunger and the other at the other side of the plunger and so disposed with reference to the elongated contact and the plunger that movement of the plungeor in onedirection causes circuit closure at each of the stationary contacts and movement of the plunger in an opposite direction causes circuit interruption at each of the stationary contacts, a permanent magnet disposed below each stationary contact, the disposition of each magnet being such that the magnet axes are parallel and the other at the other side of the plunger and the disposition being such that their axes are parallel with like poles directed in opposite directions and with one stationary'contact partly encircling one magnet and the other stationary contact partly encircling the other magnet, pole shoes disposed at the ends of each magnet so projecting transversely of the magnet
  • An electric switch comprising, a housing, a plunger slidably mounted in said housing, a spring biased elongated contact mounted transversely of the plunger on the plunger to move with movement of the plunger, a pair of stationary contacts mounted in the housing, one stationary contact being disposed at one side of the plunger and the other at the other side of the plunger and so disposed with reference to the elongated contact and the plunger that movement of the plunger in one direction causes circuit closure at each of the stationary contacts and movement of the plunger'in an opposite direction causes circuit interruption at each of the stationary contacts, a pair of relatively short cylindrical ceramic permanent magnets of insulating material mounted in spaced relation to each other in the housing one being at one side of the plungerand the other at' the other side of the plunger and the disposition being such that their axes are parallel with like poles pointing in opposite directions, one stationary contact partly enand generally normal'to the direction of movement of the elongated contact'and the plunger with like poles of the magnets being directed in the opposite
  • An electric switch comprising, a housing, a plunger slidably mounted in said housing, a spring biased elon- I gated contact mounted transversely of the plunger on the plunger to move with movement of the plunger, a pair of stationary contacts mounted in the housing, one stationary contact being disposed at one side of the plunger and theiother at the other side of the plunger and so disposed with reference to the elongated contact and the plunger that movement of the plunger in one direction causes circuit closure at each of the stationary.
  • An electric switch comprising, a housing of insulating material, a plunger having a pair of spaced stops and being slidably mounted in said housing, an elongated electric contact member disposed on the plunger against one of the stops, a back-up member slidably mounted on the plunger and disposed against the other stop, a biasing spring between'the back-up member and elongated contact member to thus bias the back-up membet and elongated contact member against the stops, a-
  • An electric switch comprising, a housing of insulating material, a plunger having a pair of spaced stops and being slidably mounted in said housing, an elongated electric contact member disposed on the plunger against one of the stops, a back-up member slid'ably mounted on the plunger and disposed against the other stop, a biasing spring between the back-up member and elongated contact member to thus bias the back-up member and elongated contact member against the stops, a pair of stationary contact members mounted in the housing, a biasing spring for the plunger for normally biasing the plunger and thus the elongated contact member on the plunger in such a direction that the movable elongated contact member does not bridge the stationary contact members, means on said housing for selectively securing said back-up member in either of two positions namely, in one position the switch is a normally open switch and in another position the switch is a normally closed switch, whereby longitudinal movement of the plunger may selectively efiect either contact closure or contact interruption,

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US832220A 1959-08-07 1959-08-07 Electrical interlock Expired - Lifetime US3064104A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA671520A CA671520A (en) 1959-08-07 Electrical interlock
US832220A US3064104A (en) 1959-08-07 1959-08-07 Electrical interlock
JP4962460U JPS3621007Y1 (enrdf_load_stackoverflow) 1959-08-07 1960-09-30

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA671520T
US832220A US3064104A (en) 1959-08-07 1959-08-07 Electrical interlock
JP4962460U JPS3621007Y1 (enrdf_load_stackoverflow) 1959-08-07 1960-09-30

Publications (1)

Publication Number Publication Date
US3064104A true US3064104A (en) 1962-11-13

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ID=72234600

Family Applications (1)

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US832220A Expired - Lifetime US3064104A (en) 1959-08-07 1959-08-07 Electrical interlock

Country Status (3)

Country Link
US (1) US3064104A (enrdf_load_stackoverflow)
JP (1) JPS3621007Y1 (enrdf_load_stackoverflow)
CA (1) CA671520A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630000A (en) * 1969-11-28 1971-12-28 Gen Electric Electrostatic air cleaner
FR2325170A2 (fr) * 1975-09-16 1977-04-15 Merlin Gerin Interrupteur electrique a semi-conducteurs de shuntage de courant
US4042798A (en) * 1974-07-31 1977-08-16 Siemens Aktiengesellschaft Mounting device for compression spring
EP0296915A1 (fr) * 1987-06-25 1988-12-28 Merlin Gerin Interrupteur rotatif à piste courbe de migration d'une racine d'arc
EP0341690A3 (en) * 1988-05-11 1991-04-10 Omron Tateisi Electronics Co. Switch with contacts
US5686712A (en) * 1995-03-30 1997-11-11 Siemens Electromechanical Components, Inc. Electrical contact assembly
EP0715326A3 (en) * 1994-11-28 1997-12-17 Matsushita Electric Works, Ltd. Sealed contact device
US5834723A (en) * 1997-06-02 1998-11-10 Allen Bradley Company, Llc Apparatus for retaining a movable contact in a circuit interrupter
US20150034600A1 (en) * 2012-04-13 2015-02-05 Fuji Electric Co., Ltd. Contact device, and electromagnetic switch in which the contact device is used

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436497A (en) * 1967-08-31 1969-04-01 Cutler Hammer Inc Electrical switch having a lost motion operator assembly

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US752552A (en) * 1904-02-16 Automatic circuit-breaker
US2153402A (en) * 1937-09-29 1939-04-04 Gen Electric Electric switch
US2337949A (en) * 1942-05-29 1943-12-28 Gen Electric Circuit breaker
US2571951A (en) * 1949-09-09 1951-10-16 Westinghouse Electric Corp Electrical apparatus
US2629035A (en) * 1948-02-12 1953-02-17 Post Glover Electric Company Magnetic blowout construction and shield
US2822450A (en) * 1955-05-20 1958-02-04 Square D Co Electric switch
US2846528A (en) * 1956-07-02 1958-08-05 Fed Pacific Electric Co Selective switches
US2896043A (en) * 1957-02-11 1959-07-21 Stackpole Carbon Co Electric switch formed from magnets

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US752552A (en) * 1904-02-16 Automatic circuit-breaker
US2153402A (en) * 1937-09-29 1939-04-04 Gen Electric Electric switch
US2337949A (en) * 1942-05-29 1943-12-28 Gen Electric Circuit breaker
US2629035A (en) * 1948-02-12 1953-02-17 Post Glover Electric Company Magnetic blowout construction and shield
US2571951A (en) * 1949-09-09 1951-10-16 Westinghouse Electric Corp Electrical apparatus
US2822450A (en) * 1955-05-20 1958-02-04 Square D Co Electric switch
US2846528A (en) * 1956-07-02 1958-08-05 Fed Pacific Electric Co Selective switches
US2896043A (en) * 1957-02-11 1959-07-21 Stackpole Carbon Co Electric switch formed from magnets

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630000A (en) * 1969-11-28 1971-12-28 Gen Electric Electrostatic air cleaner
US4042798A (en) * 1974-07-31 1977-08-16 Siemens Aktiengesellschaft Mounting device for compression spring
FR2325170A2 (fr) * 1975-09-16 1977-04-15 Merlin Gerin Interrupteur electrique a semi-conducteurs de shuntage de courant
EP0296915A1 (fr) * 1987-06-25 1988-12-28 Merlin Gerin Interrupteur rotatif à piste courbe de migration d'une racine d'arc
FR2618251A1 (fr) * 1987-06-25 1989-01-20 Merlin Gerin Interrupteur rotatif a piste courbe de migration d'une racine d'arc.
US4803319A (en) * 1987-06-25 1989-02-07 Merlin Gerin Rotary switch with curved arc root migration track
EP0341690A3 (en) * 1988-05-11 1991-04-10 Omron Tateisi Electronics Co. Switch with contacts
US5109146A (en) * 1988-05-11 1992-04-28 Omron Tateisi Electronics Co. Switch with contacts
EP0715326A3 (en) * 1994-11-28 1997-12-17 Matsushita Electric Works, Ltd. Sealed contact device
US5686712A (en) * 1995-03-30 1997-11-11 Siemens Electromechanical Components, Inc. Electrical contact assembly
US5834723A (en) * 1997-06-02 1998-11-10 Allen Bradley Company, Llc Apparatus for retaining a movable contact in a circuit interrupter
US20150034600A1 (en) * 2012-04-13 2015-02-05 Fuji Electric Co., Ltd. Contact device, and electromagnetic switch in which the contact device is used
US9653222B2 (en) * 2012-04-13 2017-05-16 Fuji Electric Co., Ltd. Contact device, and electromagnetic switch in which the contact device is used

Also Published As

Publication number Publication date
JPS3621007Y1 (enrdf_load_stackoverflow) 1961-08-15
CA671520A (en) 1963-10-01

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