US3605056A - Switch protecting device - Google Patents

Switch protecting device Download PDF

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Publication number
US3605056A
US3605056A US734484A US3605056DA US3605056A US 3605056 A US3605056 A US 3605056A US 734484 A US734484 A US 734484A US 3605056D A US3605056D A US 3605056DA US 3605056 A US3605056 A US 3605056A
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US
United States
Prior art keywords
contacts
rod
rear wall
casing
front wall
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
US734484A
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English (en)
Inventor
Kurt Tage Lennart Bergman
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3605056A publication Critical patent/US3605056A/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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses

Definitions

  • a combined switch-protecting and safety device has safety fuses which can be introduced separately into openings provided in a front wall of a casing, while a rear wall extending parallel to the front wall serves as a supporting plate for switch protective means the various parts of which are mounted on the outer side of the plate.
  • An object of the present invention is to eliminate these drawbacks of prior art installations.
  • FIG. 1 is a top view, partly in section, of the device of the present invention with the fuses removed.
  • FIG. 2 is a rear view of the device, partly in section.
  • FIG. 3 corresponds to FIG. 1 but shows the main parts of the switch safety means as being removed from the casing.
  • FIG. 4 is a side view of a fuse holder on an enlarged scale.
  • FIGS. 4a and 4b are diagrams illustrating the electrical connections.
  • FIG. 5 is a rear view of the fuse holder of FIG. 4.
  • FIG. 6 is a front view of the same fuse holder.
  • the combined switch-protecting and safety device shown in FIG. 1 includes a carrying casing 10 made preferably of a hardenable synthetic material, such as melamine resin.
  • a carrying casing 10 made preferably of a hardenable synthetic material, such as melamine resin.
  • the casing illustrated is divided into six separate spaces 12, each of which is intended to receive a separate fuse holder 14.
  • the fuse holders 14 are introduced from the front 55 into the casing through openings 18 provided in the front wall 16 thereof.
  • the fuse holder 14 has a sidewall carrying two contacts 20 and 22 located one above the other and adapted to be electrically connected by contacts 60 24 and 26 located within the holder in a manner hereinafter described.
  • the contacts 24 and 26 can establish connection with one or two safety fuses 28 and 30 which are located one above the other as soon as the fuses have been introduced from the side into the fuse holder.
  • the holder carries a stop 31 65 located between the fuses.
  • the front side of the holder has a handgrip 32 provided with openings 34 used to observe the signals of the fuses provided with small plates for that purpose.
  • the rear wall 36 of the casing 10 (FIG. 1) carries contacts 70 lation, since one side of the front wall 16 of the casing is provided with a hinge 42 while the other side has a lock or bolt 44.
  • the front portion 46 of the fuse holder is carefully sealingly fitted into the opening 18 of the casing so as to avoid penetra tion of moist and/or salt-carrying air into the casing'which; could produce deposits upon the insulating parts of the fuse holder.
  • the illustrated fuse holder can be changed in that the fuses with melting wires can be replaced by electromechanical safety devices or excess current relays.
  • the contacts 38 upon the rear wall 36 of the casing 10 are also connected to contacts 48 and 50 extending through the wall 36 and fixed thereon. These two contacts 48 and 50 are enclosed by a wall 52 constituting a separate part made of an insulating material and forming a switching-chamber 54 with an opening 56 (FIG. 2).
  • An actuating rod 58 which is movable in the axial direction, extends through the chamber 54 and carries a contact bridge 60. When the rod 58 is actuated by an electromagnet 62, the contacts 48 and 50 will be interconnected by the contact 60.
  • the switching chamber 54 is covered from the outside by a cover 64 which also serves as a cover for other switching chamberssim ilar tothe chamber 54 and containing corresponding contacts connected in series with the two fuse holders 66 and 68 located next "to the fuse holder 15 (FIG. 1).
  • the cover 64 has openings 70 and 72 (FIG. 2) containing spark quenching sheets 74 for the quenching of arcs which could occur during operation when opening the contacts 48, and 50.
  • There are no switching ing in one row with the'otherfuse holders (FIG. 1 It is ap parent that the contacts 24, 26 which are engaged by the fuse contacts, are connected by wiring with thetwo contacts 20,22 which work together with the contacts 38 in casing 10'.
  • the contact 24 can be electrically connected with the contact 20 or with the contact 22, while the contact 26 'is connectedfwith the contact 22 or 20.
  • the contact 24 connects one of the-two contacts 20 or 22 with the lower contact of the fuse 28 or 30.
  • the contact 26 interconnects the two upper contacts of the fuses 28 and 30.
  • the connection of the fuses 2 8and 30 with the switch contacts 48, 60 and 50 can be carried out at will depending upon existing requirements and canbe'different depending upon the desired circuit.
  • the fuses can be connected in series with the switch contacts or can be completely separated electrically from the circuits of these switch contacts.
  • the contacts 48, 50 and 60 are shown as closing contacts. However, it is also obviously possibleto make some of the other contacts as opening contacts, such as thecontacts 82.
  • the contacts 82-90 are included in actuating and signaling circuits and therefore are made substantially weaker than the three contact groups at the outer end of the actuating rod 58. While the electromagnet when energized moves the rod 58 toward it, the return movement of the rod 58"into its initial position is effected by a coiled spring 92 one end of whichis attached to a disc 94 fixed to the rod 58, while the other end of the spring engages the casing of the electromagnet 62.
  • FIG. 3 shows the individual switch safety parts after the removal of the casing 10.
  • the constructive unit which is removable fromthe casing includes the electromagnet 62, the actuating rod 58 and the supporting plate 114 for these parts.
  • the contacts fixed to the casing 10 can be conveniently repaired or exchanged.
  • the movable contacts 60 and 116-128 also become easily accessible and, if necessary, can be replaced.
  • the switching chamber 52 is attached to the casing 10 by means of a fastener or stop spring (not shown) and it is necessary to remove the chamber 52 before the electromagnet with the actuating rod can be withdrawn.
  • the cover of the chamber 52 contains quenching sheets 74 which are fixed in groups to a frame 130 made of a plastic material.
  • a combined switch-protecting and safety device comprising a casing having a front wall, a rear wall extending parallel to said front wall, and a plurality of partitions between said walls forming separate spaces, said front wall having a plurality of openings, at separatefuse holder tightly fitting 'in each opening and extending in a separate space, a separate sidewall carried by each fuse holder, contacts carried by said side walls, other contacts connected with the first-mentioned contacts, safety fuses connected with the second-mentioned contacts, yet other contacts carried by the side of said rear wall facing said front wall and adapted to be engaged by the firstmentioned contacts, yet other contacts constituting switch elements connected with the third-mentioned contacts and located upon the outer side of the rear wall, a rod, an electromagnet actuating said rod, and at least one contact carried by said rod and adapted to interconnect the fourth-mentioned contacts and providea switch connection, said rod and said electromagnet being removably mounted upon said rear wall, whereby removal of

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Fuses (AREA)
US734484A 1967-06-05 1968-06-04 Switch protecting device Expired - Lifetime US3605056A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE07811/67A SE338606B (enrdf_load_html_response) 1967-06-05 1967-06-05

Publications (1)

Publication Number Publication Date
US3605056A true US3605056A (en) 1971-09-14

Family

ID=20272381

Family Applications (1)

Application Number Title Priority Date Filing Date
US734484A Expired - Lifetime US3605056A (en) 1967-06-05 1968-06-04 Switch protecting device

Country Status (10)

Country Link
US (1) US3605056A (enrdf_load_html_response)
AT (1) AT288517B (enrdf_load_html_response)
BE (1) BE717805A (enrdf_load_html_response)
DE (1) DE1765513A1 (enrdf_load_html_response)
ES (1) ES355022A1 (enrdf_load_html_response)
FR (1) FR1572750A (enrdf_load_html_response)
GB (1) GB1190478A (enrdf_load_html_response)
NL (1) NL6807803A (enrdf_load_html_response)
RO (1) RO54730A (enrdf_load_html_response)
SE (1) SE338606B (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3209915A1 (de) * 1982-03-18 1983-09-22 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Elektrisches relais, insbesondere fuer kraftfahrzeuge

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1554459A (en) * 1924-09-05 1925-09-22 Lester E Norquist Entrance switch
US2919324A (en) * 1958-08-04 1959-12-29 Leach Corp Magnetic shuttle device
US2949516A (en) * 1956-11-23 1960-08-16 Ite Circuit Breaker Ltd Reposition terminals for circuit breaker base extension
US2950370A (en) * 1956-12-10 1960-08-23 Kenneth W Swain Circuit interrupting building blocks
US3202788A (en) * 1962-03-22 1965-08-24 Square D Co Cartridge fuse pull-out switch
NL6602012A (enrdf_load_html_response) * 1965-03-23 1966-09-26
US3284598A (en) * 1965-01-06 1966-11-08 Square D Co Cartridge fuse pull-out switch
CH464329A (it) * 1966-04-12 1968-10-31 Bassani Spa Portafusibile innestabile a presa e spina

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1554459A (en) * 1924-09-05 1925-09-22 Lester E Norquist Entrance switch
US2949516A (en) * 1956-11-23 1960-08-16 Ite Circuit Breaker Ltd Reposition terminals for circuit breaker base extension
US2950370A (en) * 1956-12-10 1960-08-23 Kenneth W Swain Circuit interrupting building blocks
US2919324A (en) * 1958-08-04 1959-12-29 Leach Corp Magnetic shuttle device
US3202788A (en) * 1962-03-22 1965-08-24 Square D Co Cartridge fuse pull-out switch
US3284598A (en) * 1965-01-06 1966-11-08 Square D Co Cartridge fuse pull-out switch
NL6602012A (enrdf_load_html_response) * 1965-03-23 1966-09-26
CH464329A (it) * 1966-04-12 1968-10-31 Bassani Spa Portafusibile innestabile a presa e spina

Also Published As

Publication number Publication date
DE1765513A1 (de) 1971-07-29
AT288517B (de) 1971-03-10
ES355022A1 (es) 1969-11-16
FR1572750A (enrdf_load_html_response) 1969-06-27
RO54730A (enrdf_load_html_response) 1973-09-20
SE338606B (enrdf_load_html_response) 1971-09-13
NL6807803A (enrdf_load_html_response) 1968-12-06
BE717805A (enrdf_load_html_response) 1968-12-16
GB1190478A (en) 1970-05-06

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