US3277255A - Single use circuit breaker - Google Patents

Single use circuit breaker Download PDF

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Publication number
US3277255A
US3277255A US404406A US40440664A US3277255A US 3277255 A US3277255 A US 3277255A US 404406 A US404406 A US 404406A US 40440664 A US40440664 A US 40440664A US 3277255 A US3277255 A US 3277255A
Authority
US
United States
Prior art keywords
housing
terminal contacts
actuating member
circuit breaker
circuit
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
US404406A
Other languages
English (en)
Inventor
Mattsson Kjell Valentin
Olsson Axel Erik Ludvig
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.)
Saab Bofors AB
Original Assignee
Bofors AB
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 Bofors AB filed Critical Bofors AB
Application granted granted Critical
Publication of US3277255A publication Critical patent/US3277255A/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
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/006—Opening by severing a conductor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/006—Explosive bolts; Explosive actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H2039/008—Switching devices actuated by an explosion produced within the device and initiated by an electric current using the switch for a battery cutoff

Definitions

  • the present invention relates to an electric circuit breaker and, more particularly, to a circuit breaker which is to be used only once.
  • Circuit breakers of this type may be used on missiles and particularly in rocket type missiles for breaking a circuit therein at a predetermined time, or in response to a control signal. More specifically, the circuit breaker may be advantageously used on missiles carrying several electrically ignitable tracers. With missiles of this type it is often desired to ignite all the tracers on the missiles, or only selected ones. For such use, the circuit breaker is connected with the energizing circuits for the ignition devices of the tracers so that the circuit breaker when operated interrupts the energizing circuits for the nonselected tracers so that the same remain inactive. Actuation of the tracer circuits may be conventionally controlled by a timing device or a selector transmitting a control signal to the circuit breaker.
  • a more specific object of the invention is to provide a novel and improved circuit breaker of the general kind above-referred to which is simple, rugged and inexpensive in construction in that the circuit breaker does not include any delicate parts which are likely to be damaged by the heavy jars and rapid acceleration to which a missile is unavoidably subjected when launched.
  • FIG. 1 is a longitudinal cross section of a circuit breaker according to the invention.
  • FIG. 2 is a circuit diagram of a tracer assembly including the circuit breaker.
  • the exemplified circuit breaker comprises a sleeve formed of two parts and 21 suitably secured together, for instance by a screw connection.
  • Sleeve part 20 includes a holder 22 for an electric igniting device 23 of conventional design. The device is connected to conductor wires 24 and 25 which should be visualized as leading to a suitable source of current.
  • a pyrotechnical charge 26 of suitable and conventional composition is fitted into sleeve part 20 in coacting relationship with igniter 23 so that the charge will be ignited when the igniter is activated.
  • Sleeve part 21 houses two terminal contacts 28 and 29 in the form of metal pins which are secured in the sleeve part by suitable means such as an insulation plug 27.
  • the two pins lead to conductor wires 28a and 29a which should be visualized as being connected to a control circuit.
  • the two pins 28 and 29 are bridged by a frangible conductive bridge 30 formed for instance by thin metal wires.
  • a plunger 31 of insulation material is slidably fitted in sleeve part 21 between the charge 26 and the bridged end of pins 28 and 29.
  • a frangible disk 32 of insulation material is preferably interposed between the pins and the 3,277,255 Patented Oct. 4, 1966 adjacent face of the plunger for a purpose which will become more fully apparent from the subsequent description.
  • the end face of the plunger facing the pins includes an annular recess 33 to define a central lug 34.
  • the plunger will be retained in its position in any position of the circuit breaker and also when the circuit breaker is subjected to jars.
  • the charge 26 is ignited by activating igniter 23, the there by generated pressure force will drive the plunger towards the right as seen in the figure.
  • disk 32 will be fractured and the central lug 34 will break bridge 30.
  • Recess 33 will accommodate pins 28 and 29 when the face of lug 34 moves past the location of bridge 30.
  • FIG. 2 shows a circuit system for selectively igniting one or four tracers in a rocket type missile or similar Weapon.
  • the rocket type missile which should be visualized as being conventional and is not shown, comprises a battery 35 which is activated by suitable and conventional means (not shown) when the missile is launched.
  • the battery serves to supply current for the entire mechanism of the missile but only those circuit components of the mechanism which are essential for the understanding of the invention are included in the circuit diagram.
  • the tracer assembly is shown and, in particular, the electric igniters 36, 37, 38 and 39 tor the tracers.
  • Igniter 39 is connected across the terminals of the battery through lines 40, 41 and 43.
  • An initially open switch 42 is connected between lines 41 and 43.
  • Igniters 36, 37, and 38 are connected to line 41 through a line 44 and also to line through a circuit breaker R of the kind shown in FIG. 1.
  • the bridge 30 of FIG. 1 is symbolized in FIG. 2 by a switch 45 and the igniter 26 of FIG. 1 is symbolized by the symbol 46 in FIG. 2.
  • Igniter 46 is connected to one terminal of the battery through lines 47 and 40 and to the other terminal through lines 48 and 51. Lines 48 and 51 are connected by a selector switch 49.
  • the selector switch may be visualized as being part of a stationary control device 50 which is suitably connected with the missile.
  • a circuit breaker comprising a tubular housing, two terminal contacts connectable to a control circuit and fixedly mounted in said housing, a frangible conductor bridging said terminal contacts, an actuating member movable in said housing from an inactive position separated from said terminal contacts into a circuit breaking position, said actuating member including a plunger slidable in said housing along a path intersecting the position ocupied by said bridging conductor and having in its end face facing said terminal contacts an annular recess defining a central lug, said lug being engageable with said bridging conductor so as to fracture the same and said recess receiving the terminal contacts when and while the lug is moving towards its circuit breaking position, a pyrotechnical charge disposed in said housing adjacent to the end face of the plunger opposite the recessed face thereof, and an activating means for igniting said charge, the pressure generated upon ignition of the charge in said housing causing movement of the actuating member into its circuit breaking position.
  • a circuit 'breaker comprising a tubular housing, two terminal contacts connectable to a control circuit'and fixedly mounted in said housing, a frangible conductor bridging said terminal contacts, an actuating member lengthwise movable in said housing from an inactive position separated from said terminal contacts into a circuit breaking position in which the actuating member causes fracturing of said bridging conductor, a pyrotechnical charge disposed in said housing on the side of the actuating member remote from said terminal contacts, a frangible partition wall in the housing interposed between said terminal contacts and said actuating member to prevent accidental displacement of the latter into its circuit breaking position, and an activating means for igniting said charge, the pressure generated upon ignition of the charge in said housing causing movement of the actuating member into its circuit breaking position.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Fuses (AREA)
US404406A 1963-10-22 1964-10-16 Single use circuit breaker Expired - Lifetime US3277255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1157863 1963-10-22

Publications (1)

Publication Number Publication Date
US3277255A true US3277255A (en) 1966-10-04

Family

ID=20294215

Family Applications (1)

Application Number Title Priority Date Filing Date
US404406A Expired - Lifetime US3277255A (en) 1963-10-22 1964-10-16 Single use circuit breaker

Country Status (8)

Country Link
US (1) US3277255A (da)
AT (1) AT252766B (da)
BE (1) BE654616A (da)
CH (1) CH413108A (da)
DE (1) DE1438870A1 (da)
DK (1) DK115526B (da)
GB (1) GB1021249A (da)
NL (1) NL6412101A (da)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482484A (en) * 1968-01-22 1969-12-09 Atlas Chem Ind Cutting tool
US3748413A (en) * 1972-03-01 1973-07-24 Cartridge Actuated Devices Explosive type circuit breaker with frangible printed circuit board
US3793501A (en) * 1972-12-04 1974-02-19 Ici America Inc Explosive switch
US3873786A (en) * 1972-06-26 1975-03-25 France Etat Explosive type switch with circuit serving means
US4224487A (en) * 1978-02-23 1980-09-23 Simonsen Bent P Fast acting explosive circuit interrupter
US5535842A (en) * 1993-03-05 1996-07-16 Volkswagen Ag Safety arrangement for collision-related disconnection of an electrical energy source from a motor vehicle supply circuit
US6222439B1 (en) * 1998-02-17 2001-04-24 Sumitomo Wiring Systems, Ltd. Circuit breaking device
US20060049027A1 (en) * 2004-09-08 2006-03-09 Iversen Arthur H Fast acting, low cost, high power transfer switch
US20080191830A1 (en) * 2004-09-09 2008-08-14 Lisa Dräxlmaier GmbH Load Shedder
US20100073120A1 (en) * 2007-03-26 2010-03-25 Robert Bosch Gmbh Thermal fuse for use in electric modules
US20100328014A1 (en) * 2009-06-29 2010-12-30 Toyoda Gosei Co., Ltd. Electric circuit breaker apparatus for vehicle
US20130056344A1 (en) * 2010-03-15 2013-03-07 Herakles Electric circuit breaker with pyrotechnic actuation
US20130255464A1 (en) * 2010-12-27 2013-10-03 Daikin Industries, Ltd. Cutter
US20130255463A1 (en) * 2010-12-27 2013-10-03 Daikin Industries, Ltd. Cutter
US20130263714A1 (en) * 2010-12-27 2013-10-10 Daikin Industries, Ltd. Cutter
US20140061011A1 (en) * 2012-08-29 2014-03-06 Toyoda Gosei Co., Ltd. Conduction breaking device
US20170263402A1 (en) * 2014-09-09 2017-09-14 Airbus Safran Launchers Sas Pyrotechnic circuit breaker having an improved structure for accommodating a bus bar, and assembly method thereof
US10622176B2 (en) 2017-10-11 2020-04-14 Key Safety Systems, Inc. High voltage electric line cutter device
US10763064B2 (en) 2018-12-12 2020-09-01 Key Safety Systems, Inc. Electric fuse box or junction box assembly with a high voltage electric line cutter device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112311054B (zh) * 2020-10-23 2022-08-05 中国运载火箭技术研究院 一种箭载供配电系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2929892A (en) * 1957-11-19 1960-03-22 Raymond Engineering Lab Inc Explosive actuated switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2929892A (en) * 1957-11-19 1960-03-22 Raymond Engineering Lab Inc Explosive actuated switch

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482484A (en) * 1968-01-22 1969-12-09 Atlas Chem Ind Cutting tool
US3748413A (en) * 1972-03-01 1973-07-24 Cartridge Actuated Devices Explosive type circuit breaker with frangible printed circuit board
US3873786A (en) * 1972-06-26 1975-03-25 France Etat Explosive type switch with circuit serving means
US3793501A (en) * 1972-12-04 1974-02-19 Ici America Inc Explosive switch
US4224487A (en) * 1978-02-23 1980-09-23 Simonsen Bent P Fast acting explosive circuit interrupter
US5535842A (en) * 1993-03-05 1996-07-16 Volkswagen Ag Safety arrangement for collision-related disconnection of an electrical energy source from a motor vehicle supply circuit
US6222439B1 (en) * 1998-02-17 2001-04-24 Sumitomo Wiring Systems, Ltd. Circuit breaking device
US20060049027A1 (en) * 2004-09-08 2006-03-09 Iversen Arthur H Fast acting, low cost, high power transfer switch
US7498923B2 (en) 2004-09-08 2009-03-03 Iversen Arthur H Fast acting, low cost, high power transfer switch
US20080191830A1 (en) * 2004-09-09 2008-08-14 Lisa Dräxlmaier GmbH Load Shedder
US7772958B2 (en) * 2004-09-09 2010-08-10 Lisa Dräxlmaier GmbH Load shedder
US20100073120A1 (en) * 2007-03-26 2010-03-25 Robert Bosch Gmbh Thermal fuse for use in electric modules
US20100328014A1 (en) * 2009-06-29 2010-12-30 Toyoda Gosei Co., Ltd. Electric circuit breaker apparatus for vehicle
US8432246B2 (en) * 2009-06-29 2013-04-30 Toyoda Gosei Co., Ltd. Electric circuit breaker apparatus for vehicle
US20130056344A1 (en) * 2010-03-15 2013-03-07 Herakles Electric circuit breaker with pyrotechnic actuation
US9153402B2 (en) * 2010-12-27 2015-10-06 Daikin Industries, Ltd. Cutter
US20130255463A1 (en) * 2010-12-27 2013-10-03 Daikin Industries, Ltd. Cutter
US20130263714A1 (en) * 2010-12-27 2013-10-10 Daikin Industries, Ltd. Cutter
US20130255464A1 (en) * 2010-12-27 2013-10-03 Daikin Industries, Ltd. Cutter
US9236208B2 (en) * 2010-12-27 2016-01-12 Daikin Industries, Ltd. Cutter for a current-carrying member
US20140061011A1 (en) * 2012-08-29 2014-03-06 Toyoda Gosei Co., Ltd. Conduction breaking device
US9324522B2 (en) * 2012-08-29 2016-04-26 Toyoda Gosei Co., Ltd. Conduction breaking device
US20170263402A1 (en) * 2014-09-09 2017-09-14 Airbus Safran Launchers Sas Pyrotechnic circuit breaker having an improved structure for accommodating a bus bar, and assembly method thereof
US10128074B2 (en) * 2014-09-09 2018-11-13 Arianegroup Sas Pyrotechnic circuit breaker having an improved structure for accommodating a bus bar, and assembly method thereof
US10622176B2 (en) 2017-10-11 2020-04-14 Key Safety Systems, Inc. High voltage electric line cutter device
US11081303B2 (en) 2017-10-11 2021-08-03 Key Safety Systems, Inc. High voltage electric line cutter device
US10763064B2 (en) 2018-12-12 2020-09-01 Key Safety Systems, Inc. Electric fuse box or junction box assembly with a high voltage electric line cutter device

Also Published As

Publication number Publication date
BE654616A (da) 1965-02-15
NL6412101A (da) 1965-04-23
CH413108A (de) 1966-05-15
GB1021249A (en) 1966-03-02
DE1438870A1 (de) 1969-02-06
AT252766B (de) 1967-03-10
DK115526B (da) 1969-10-13

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