US2074612A - Arc rupturing device for electric safety fuses - Google Patents

Arc rupturing device for electric safety fuses Download PDF

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Publication number
US2074612A
US2074612A US53750A US5375035A US2074612A US 2074612 A US2074612 A US 2074612A US 53750 A US53750 A US 53750A US 5375035 A US5375035 A US 5375035A US 2074612 A US2074612 A US 2074612A
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US
United States
Prior art keywords
outlet
fluid
casing
arc
electric safety
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
US53750A
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English (en)
Inventor
Lange Emil
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Individual
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Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US2074612A publication Critical patent/US2074612A/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
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/38—Means for extinguishing or suppressing arc
    • H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas

Definitions

  • This invention relates to an electric safety fuse for high tension currents of the kind wherein the are formed between the contacts on fusing of the wires, is ruptured by a blast produced by the arc itself as it heats the fluid content of the fuse casing.
  • the object of the invention is to provide means for maintaining the blast itself as cool as possible in order to ensure a reliable rupturing of the arc, and the invention consists essentially in the provision of means for forming one are at the outlet of the casing and another are within a confined space in the casing communicating with the outlet through a circuitous route, so
  • Figs. 1 and 2 of the accompanying drawing represent longitudinal sections of different forms of fuses constructed according to the invention.
  • the safety fuse comprises a casing I of insulating material fltted at the ends with closing members 8 and 9 forming contacts for connecting the fuse to a high tension electric circuit
  • a plug 3 in the casing forms a narrow outlet for the air or other fluid obtained in the casing.
  • the bell is made of insulating material and carries at the crown a conducting member 6 which is connected by fuse wires to the contacts 8 and 8.
  • One wire I passes through the bell 5 and is connected to a lug 2 on the contact 9.
  • the second fuse wire 4' is connected to the plug 3 within the outlet opening.
  • the outlet may be closed by a spring-controlled valve 1 adapted to open at a given pres- 5 sure in order to produce a strong blast.
  • a fuse wire 4 is run through the outlet from the conducting member 6 to the closing valve H and connected to the latter. 10
  • An electric safety fuse of the character described comprising an insulating casing containing fluid and having at one end thereof a narrow outlet for said fluid, a contact member at 15 each end of the casing, a confined space in said casing communicating with the outlet through a circuitous route, and fuse wires connecting the contacts through the outlet and through said space so that, on a fusing of the wires, area 20 will be formed at the outlet as well as in said space and so that the heating of the fluid in the latter will cause the fluid outside the space to be ejected through the outlet for,rupturing the arc.
  • An electric safety fuse of the character described comprising an insulating casing containing a fluid and having at one end a narrow outlet for said fluid, a contact member at each end of the casing, a bell of insulating material 30 supported within the casing with the crown turned towards the outlet, a conducting member fitted in the crown of the bell, and fuse wires connecting said conducting member with one contact through the outlet and with the other 35 contact through the bell so that, on fusing of the wires, arcs will be formed at the outlet as well as within the bell, the latter being arranged so that the fluid pressure within it caused by the arc will causethe fluid outside it to be ejected through the outlet for rupturing the are at the latter 3.
  • the electric fuse claimed in claim 2 in combination with a spring-controlled valve normally closing the outlet and adapted to open at a 45 given pressure of the fluid.

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  • Fuses (AREA)
US53750A 1935-01-14 1935-12-10 Arc rupturing device for electric safety fuses Expired - Lifetime US2074612A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE793542X 1935-01-14

Publications (1)

Publication Number Publication Date
US2074612A true US2074612A (en) 1937-03-23

Family

ID=6709992

Family Applications (1)

Application Number Title Priority Date Filing Date
US53750A Expired - Lifetime US2074612A (en) 1935-01-14 1935-12-10 Arc rupturing device for electric safety fuses

Country Status (4)

Country Link
US (1) US2074612A (de)
AT (1) AT151244B (de)
CH (1) CH187225A (de)
FR (1) FR793542A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429518A (en) * 1943-04-15 1947-10-21 Kyle Corp Power fuse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429518A (en) * 1943-04-15 1947-10-21 Kyle Corp Power fuse

Also Published As

Publication number Publication date
FR793542A (fr) 1936-01-27
CH187225A (de) 1936-10-31
AT151244B (de) 1937-10-25

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