US1629640A - Automatic electric-circuit breaker - Google Patents

Automatic electric-circuit breaker Download PDF

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Publication number
US1629640A
US1629640A US130205A US13020526A US1629640A US 1629640 A US1629640 A US 1629640A US 130205 A US130205 A US 130205A US 13020526 A US13020526 A US 13020526A US 1629640 A US1629640 A US 1629640A
Authority
US
United States
Prior art keywords
slide
springs
solenoid
contact pieces
overload
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
US130205A
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English (en)
Inventor
Schachtner Heinrich
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.)
Stotz G M B H Abt Der Brown Boveri & Cie A-G
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1629640A publication Critical patent/US1629640A/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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/32—Insulating body insertable between contacts
    • 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
    • H01H73/48—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 having both electrothermal and electromagnetic automatic release
    • H01H73/56—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 having both electrothermal and electromagnetic automatic release reset by push-button, pull-knob or slide

Definitions

  • My invention relates to automatic electric circuit breakers of the kind in which two contact' pieces normally pressed together by springs are separated by the interposition of an "insulatin slide.
  • two insulating slides areused one of which is disposed below the contact pieces and is automatically interposed between the same by means of a solenoid and of a mechanical device when overload occurs, and the other slide is disposed above the contact pieces opposite to and in alignment with the first slide and is provided on a press button normally raised by spring action, in such manner that this second slide, when the button is pressed down, presses the first slide back from the cut-out position and' moves itself into position between the contact pieces and, when the press button is raised again by spring action, allows the contact pieces to be returned by their springs into the switched-on position if the overload has ceased, but allows the first slide to re-enter between the contact pieces if the overload still continues.
  • switching-on can be effected by the mere pressure of the finger Without, the necessity of unscrewing the apparatus from its socket, but on the other hand, whilethe overload continues one may attempt, without danger, but without success, to switch-on the apparatus.
  • a thermostat may be provided consisting of a bi-metal spring and an electric heating element, which latter starts the movement of theslide when the circuit is only slightly overloaded for a fairly long period by reason of the heating action and the curvature of the bi-metal spring thereby produced.
  • the upper compartment are disposed the solenoid coil 3, shown diagrammatically in the drawings, the vertically reciprocating solenoid core, which consists of two similar and parallel irons bars 4, and the slide 5, which is made of an insulating substance and is rigidly secured at its lowe r'part between the bars 4, the knife-like upper part of the slide extending above the solenoid coil 3.
  • the upper compartment two similar horn-shaped flat springs 6 (Figs. 1 to 3) are provided, or two pairs of such springs 6 (Figs. 5 and 6), which springs are held at 30 by fittings, not illustrated, on both sides of the solenoid coil 3 and bridge over this coil and the slide 5.
  • the contacts 7 which are formed from the free upwardly bent ends of the springs 6, are pressed together by these springs in the switched-on position of the apparatus illustrated; that is to say, they come into contact in the vertical central plane of the device in which lane the edge of the slide 5 is also dispose at a short distance below the line of contact of the contacts 7.
  • the bi-metal spring 8 which is fastened at one end to the partition 2, the electric heating element 9, which is disposed adjacent the spring 8, and a mechanical de vice hereinafter described.
  • This device consists of three parts, viz, a double armed lever 10 (Figs. 1, 2 and 4), or 11 (Fig. 5), which is pivoted to the partition'2 at 12 (Figs. 1 and 4) or to a bracket extending downwardly from the partition at 1-3 (Fig. 5), and two helical springs 14, fastened at one end to the partition 2 at 15 (Figs. 1 and 4) or at 16 (Fig. 5) and at the other end connected at 17 with the lever 10 or 11.
  • this lever is connected by means of a link 18 to the solenoid core bars 4, which pass through a hole in the partition 2 into v to hold the lever or 11 together with the the lower compartment of the casing.
  • the axes of the springs 14 lie somewhat above the pivot pin 12 of the lever 10 (Fig. 1) or in front of the pivot pin 13 (Fig. 5), so that these springs tend solenoid core 4 and the slide 5 in this position.
  • the latter is secured at one end to the wall of the casing 1 and is normally held firmly in the position indicated in the drawing by the bi-metal spring 23 the free end of which being bent over that of the spring 22, but after sufiicient heating and bending of the spring 23 is suddenly released and strikes against the lever 10 or 11.
  • a press button 24 which is provided of an insulating substance and reciprocat-es vertically in a hole provided centrally in the cover plate of thecasing 1 and is raised by springs 25.
  • a knife shaped slide 26 which may be formed integrally with the button and which is provided above the contacts 7 opposite to and in alignment with the slide 5 presses the latter back to the switched-on position and is itself interposed between the contacts.
  • the springs 14 the axes of which return to a position above the pivot pin 12 or in front of the pivot pin 13 after the completion of the switchingon movement hold the parts 4 and 5 firmly in the switchedon position by means of the lever 10 or.11 when the overload has ceased, while the button 24 is again raised by the springs 25 when the pressure upon it is released and thus the springs 6 with the contacts 7 return into the switched-on position. If however the overload continues. the parts 4 and 5 are at once again raised by the solenoid coil 3 and the mechanical device, so that the slide 5, following the slide 26, again comes into position between the contacts 7 and thus prevents the apparatus from being switched on so long as the circuit is overloaded.
  • An upwardly vextending rod 27 is fixed to the slide 5 and is provided at the upper end with a coloured pin 28. In the switched-on position this pin is disposed completely within a longitudinal hole in the press button 24, while it protrudes at the top in the switched-oil position and thus serves to indicate this position.
  • each pair of springs 6 there is provided a pair of metal arms 29 forming conductors which are connected to the springs at the positions 30 at which they are mounted and thence extend upwardly and inwardly at an angle their upper ends being disposed above the solenoid coil 3 and adjacent the contacts 7.
  • the single pairof metal arms 29 are provided upon the opposite or left hand side of the coil 3.
  • the two pairs ofmetal arms 29 are provided upon both sides of the solenoid coil, 2
  • the are or arcs which are formed between the contacts 7 upon the circuit being broken is or are directed by the magnetic field to one side or the other according to the direction of the current in the coil and in the springs by reason of the bridging over of the solenoid coil 3 by the contact springs 6 and contacts 7, that is to say in the de vice according to Figs. 1 and 3 the arc is directed laterally to the unoccupied half of the upper compartment in the casing in'the direction of current indicated by arrows in Fig. 3. while in the device according to Figs. 5 and 6 the two arcs are directed outwardly in opposite directions as indicated in Fig.
  • the current then passes in disposed below ea s re coil 3 towards the freespace inthe' compartment.
  • the metal arms 29 are provided upon the side or sides to which the are or arcs is or are directed andas-the' tact pieces normally pressed together by springs, a solenoid coil, a solenoid core, an insulating slide connected to said core and said contact pieces, a press button normally raised by spring action, and a second insulating slide provided on said press button and disposed above said contact pieces opposite to and in alignment with the first said slide, in such manner that the first said Slld6,- when overload occurs,
  • Inan automatic electric overload cirwith two 0on [pressed together by i ;released by the movement springs 6 so that is auto-'- matically interposed between said. contact ,pieces' by means of second insulating springs into thethe overload has asolenoid core, a

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US130205A 1924-11-08 1926-08-19 Automatic electric-circuit breaker Expired - Lifetime US1629640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE242664X 1924-11-08

Publications (1)

Publication Number Publication Date
US1629640A true US1629640A (en) 1927-05-24

Family

ID=5917103

Family Applications (1)

Application Number Title Priority Date Filing Date
US130205A Expired - Lifetime US1629640A (en) 1924-11-08 1926-08-19 Automatic electric-circuit breaker

Country Status (4)

Country Link
US (1) US1629640A (enrdf_load_stackoverflow)
FR (1) FR605790A (enrdf_load_stackoverflow)
GB (1) GB242664A (enrdf_load_stackoverflow)
NL (1) NL16777C (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455067A (en) * 1941-06-06 1948-11-30 Line Material Co Automatic reclosing circuit breaker
US2463216A (en) * 1945-05-28 1949-03-01 Milwaukee Gas Specialty Co Thermocouple safety pilot switch
US2854544A (en) * 1956-08-06 1958-09-30 John P Wuerthner Relay
US3081393A (en) * 1958-07-15 1963-03-12 Robert J Wohl Electric vaporizers
US3168627A (en) * 1962-03-07 1965-02-02 Western Electric Co Relay with positively driven contacts
US3277412A (en) * 1963-01-19 1966-10-04 Acena Alfonso Romera De La Electromagnetic switch having intermittent operation
US3918015A (en) * 1974-08-12 1975-11-04 Raymond Lee Organization Inc Controlled circuit breaker unit
US4458225A (en) * 1982-11-18 1984-07-03 Eaton Corporation Circuit breaker with independent magnetic and thermal responsive contact separation means
US4594489A (en) * 1984-01-25 1986-06-10 Doduco Kg Dr. Eugen Durrwachter Electrical switching element

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8703636D0 (en) * 1987-02-17 1987-03-25 Fdb Electrical Ltd Earth leakage circuit breaker
JPH0714254B2 (ja) * 1989-07-11 1995-02-15 ウチヤ・サーモスタット株式会社 自動電源遮断器および自動電源遮断器に用いるリレーと浸水検知器

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455067A (en) * 1941-06-06 1948-11-30 Line Material Co Automatic reclosing circuit breaker
US2463216A (en) * 1945-05-28 1949-03-01 Milwaukee Gas Specialty Co Thermocouple safety pilot switch
US2854544A (en) * 1956-08-06 1958-09-30 John P Wuerthner Relay
US3081393A (en) * 1958-07-15 1963-03-12 Robert J Wohl Electric vaporizers
US3168627A (en) * 1962-03-07 1965-02-02 Western Electric Co Relay with positively driven contacts
US3277412A (en) * 1963-01-19 1966-10-04 Acena Alfonso Romera De La Electromagnetic switch having intermittent operation
US3918015A (en) * 1974-08-12 1975-11-04 Raymond Lee Organization Inc Controlled circuit breaker unit
US4458225A (en) * 1982-11-18 1984-07-03 Eaton Corporation Circuit breaker with independent magnetic and thermal responsive contact separation means
US4594489A (en) * 1984-01-25 1986-06-10 Doduco Kg Dr. Eugen Durrwachter Electrical switching element

Also Published As

Publication number Publication date
GB242664A (en) 1926-07-01
FR605790A (fr) 1926-06-01
NL16777C (enrdf_load_stackoverflow)

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