US3761847A - Drive mechanism for electrical switches - Google Patents

Drive mechanism for electrical switches Download PDF

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Publication number
US3761847A
US3761847A US00287285A US3761847DA US3761847A US 3761847 A US3761847 A US 3761847A US 00287285 A US00287285 A US 00287285A US 3761847D A US3761847D A US 3761847DA US 3761847 A US3761847 A US 3761847A
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US
United States
Prior art keywords
cartridge
cylinder
actuating
double
drive mechanism
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
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US00287285A
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English (en)
Inventor
H Strubin
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
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BBC Brown Boveri France SA
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 BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
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Publication of US3761847A publication Critical patent/US3761847A/en
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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
    • H01H39/002—Switching devices actuated by an explosion produced within the device and initiated by an electric current provided with a cartridge-magazine
    • 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

Definitions

  • a double-acting drive mechanism for actuating the contacts of an electrical switch between open and closed position includes a cylinder having a doubleacting piston therein and a piston rod extending through one end of the cylinder for connection to the contact actuating mechanism of the switch.
  • Each end of the cylinder is closed by a stationary member having a. flanged portion provided with one or more circular rows of cartridge chambers serving as a magazine and which communicate with the corresponding end of the cylinder, and a latch-releasable spring-driven rotary member carrying a firing pin is mounted on each end closure member for the cylinder for rotation in a stepby-step manner around the row of cartridge chambers so as to fire the cartridges in succession.
  • the primary object of the present invention is to provide a more simple solution where the transfer of cartridges by moving magazines is avoided but still providing a relatively large quantity of cartridges.
  • the drive proposed by the invention is characterized by the features that both ends'of a cylinder which holds the driving piston, are closed off by flanged end membersdesigned to form a stationary cartridge magazine, whereby the. flanged endmembers are provided with a part that is rotatable by spring force, and which after the ignition of one cartridgecanalways be made ready to provide the next cartridge by the transitory release of the spring-activated turning device,.the release being controlled by the explosive gas, and that the rotatable part is provided with a striker pin and a duct which guides the explosive gases to the drive area.
  • FIG. 1 shows the improved drive in longitudinal cross-section
  • FIG. 2 is also a cross-section which depicts avariation in a detail of the cartridge arrangement in'FIG. v1;
  • FIGS. 3 and 3a are sections along the cutting line A A, with FIG. 3, 3a depicting the same cartridge arrangement as shown by FIG. 2.
  • the .double acting working piston 14 is seen to be located within cylinder 14a. Piston 14 is provided with a piston rod 14b,
  • both ends of the piston cylinder 14a are closedoff, each with one flanged end member 10. Inside the flanged end members, spaces and 6 are provided which can have volumes of different sizes. In the species depicted, the space 5 located at the left end of cylinder 14a which communicates with the left side of'pist'on I4 is larger so that with the use of identical cartridges, theenergy of thrust, acting in this direction, i.e.,.towards the right,
  • the thrust space 6 for the switch-off direction associated with the right end of cylinder 14a and the right side of piston 14 is kept smaller with the result that a desirable greater driving force of piston 14 and piston rod 14b to the left is generated.
  • the cartridges 11 are accommodated in bores provided in the flanged end members 10, located along a single pitch circle or along two circles 1, 2 (FIG. 3). It will be advantageous in this connection, as shown by FIGS. 2 and 3, to arrange the bores of the smaller'pitch circle 1 so as to lie between the bores of the larger circle 2, because in this manner a greater number of bores, and consequently a greater number of cartridges 11 can be accommodated in the flanged end members 10.
  • a rotatable part 22 which is provided with a duct l2 which extends in a radial direction inwardly from the cartridge chamber 11a and terminates in a circumferentially extending passageway 12a which is in constant communication with the spaces 5, 6 respectively by means of one or more bores 50, 6a through the wall of the mounting part 10a.
  • the rotatable part 22 is provided with a longitudinally extending arm portion 22a which rotates in contact with the periphery of the flanged end member 10 and which is provided with a pivotally mounted lever 9 which, in the case of the embodiment depicted in FIG. 1, carries a single firing pin 4 having a stroke along a path intersecting the pitch circle defining the positions of the circumferentially spaced cartridge chambers l'la.
  • the corresponding lever 9' is provided with two firing pins 4, 4 which are aligned respectively with each of the two concentric pitch circles 1 and 2 provided with the staggered circular rows of cartridge chambers 11a and 11b in which the cartridge 11 are fired in alternation.
  • dummy holes 3 are located along each of the two pitch circles in alternation with the cartridge chambers l laand 11b so that each time the firing pin lever 9 is actuated, one firing pin serves to detonatea cartridge along one pitch circle and the other firing pin enters a dummy hole 3 on the other pitch circle.
  • each of the two magnetic systems includes a permanent magnet 7 having an annular configuration which concentrically surrounds the cylinder 14a and is supported by a radially extending flange 14b.
  • Each annular magnet 7 is provided with an annular pole shoe 7a and includes an annular disc-shaped armature 8 carried by an annular support 25 which is slidable along and is guided by a cylindrical control coil 26 surrounding and supported by cylinder so as to provide for movement of armature 8 between the lever-striking position depicted at the left end of FIG.
  • a casing 28 enclosing a compression spring 20 which exerts its force against a tappet rod 17a slidable within a bore 16 which communicates with the circular passageway 12a.
  • a resilient pawl 17 engageable with and controlling the operation of a latch lever, one end of this lever 18 being engageable with the pawl and the opposite end being arranged to engage in one of a circumferential array of grooves 21 provided at the periphery of the end member 10, as shown more clearly in FIG. 3a.
  • a spirally coiled spring 23 is located in a recess b provided within each of the end members 10 and surrounds the cylindrical portion 10a.
  • the inner end of spring 23 is anchored to the portion 10a and the outer end of spring 23 is provided with a driving dog 23a which engages a recess 22b provided in the rotatable part 22.
  • the driving spring 23 is wound by rotating the part 22 about the end member 10 with the latch lever 18 disengaged.
  • the'operating arrangement for the cartridge magazine structure at each end of cylinder 14a is alike with the possible exception that the volume of space 5 is made somewhat greater than that of space 6 so as to provide a less forceful actuation of the switch contacts to the contact-closed position as piston rod 14b is driven from left to right as viewed in FIG. 1.
  • the cartridges 11 are retained within their chambers by means of an annular ring 27 provided with an annular groove or grooves 27a depending upon whether one or two rings of cartridges are utilized which receive and press against the ends of the cartridges. Removal of ring 27 enables the cartridge magazine structure to be re-filled simply and quickly. While the spaces 5 and 6 have essentially the same diameter and length, the differences in their respective volumes is attributable to the fact that piston rod 14b passes through the space 6 thus reducing its effective volume accordingly.
  • a double-acting drive mechanism for actuating the contacts of an electrical switch between their closed and open positions
  • the combination comprising a cylinder, a double-acting piston operable within said cylinder, a flanged end member for and closing off each end of said cylinder, the flanged portion of each said end member being provided with at least one circular row of circumferentially spaced chambers constituting a stationary magazine for receiving cartridges which upon detonation produce explosion gases for driving said piston from one end of said cylinder to the other, a piston rod extending through one of said end members and which is connectible to the switch contact actuating means, duct means establishing an explosion gas flow path between each of said cartridge chambers and the corresponding end of said cylinder, cartridge firing means including a firing pin mounted on said end member for rotation in a step-by-step manner along said row of cartridge chambers for effecting consecutive firing of the cartridges, actuating means for said firing pin, spring means for imparting a continuous torque to said rotary cartridge firing means, a latching
  • a double-acting drive mechanism as defined in claim 1 for actuating the contacts of an electrical switch wherein each of said flanged end members is provided with a pair of concentric circular rows of circumferentially spaced cartridge chambers, the cartridge chambers of one row being circumferentially staggered with respect to the cartridge chambers of the other row, and wherein said cartridge firing means is provided with a firing pin serving each row of cartridge chambers.
  • a double-acting drive mechanism as defined in claim 1 for actuating the contacts of an electrical switch wherein said firing pin is mounted on a lever and wherein said actuating means for said firing pin is constituted by a magnetic assembly including a stationary annular holding magnet surrounding said cylinder, an annular armature member also surrounding said cylinder and which is mounted for movement parallel to itself between said holding magnet and a position striking said firing pin lever, and a striker spring engaging said armature member for driving the latter against said firing pin lever when released from said magnet.
  • a double-acting drive mechanism as defined in claim 4 for actuating the contacts of an electrical switch and which further includes means actuated by the explosion gases for resetting said armature member into engagement with said holding magnet and simultaneously storing a force in said striker spring.
  • a double-acting drive mechanism as defined in claim 1 for actuating the contacts of an electrical switch and wherein said duct means establish a flow path for the explosion gases from said cartridge chambers to the end of said cylinder includes a passageway leading through said rotary cartridge firing means into a space provided in said end member and which communicates with the end of said cylinder.
  • a double-acting drive mechanism as defined in claim 7 for actuating the contacts of an electrical switch wherein the effective volumes of the spaces provided respectively in said end members differ from one another so as to provide correspondingly different driving forces on said piston for its opposite directions of movement.
  • a double-acting drive mechanism as defined in claim 1 for actuating the contacts of an electrical switch wherein said latching device includes a latch lever mounted on said rotary cartridge firing means, one end of said lever being engagcable in each of a circular row of circumferentially spaced grooves provided in said end member, and the other end of said lever being actuatable by a pawl which in turn is actuated in response to the pressure created by the explosion gases.

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  • Portable Nailing Machines And Staplers (AREA)
  • Circuit Breakers (AREA)
US00287285A 1971-09-23 1972-09-08 Drive mechanism for electrical switches Expired - Lifetime US3761847A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1384371A CH536548A (de) 1971-09-23 1971-09-23 Antrieb für elektrische Schalter

Publications (1)

Publication Number Publication Date
US3761847A true US3761847A (en) 1973-09-25

Family

ID=4395809

Family Applications (1)

Application Number Title Priority Date Filing Date
US00287285A Expired - Lifetime US3761847A (en) 1971-09-23 1972-09-08 Drive mechanism for electrical switches

Country Status (9)

Country Link
US (1) US3761847A (it)
JP (1) JPS4839973A (it)
CA (1) CA962727A (it)
CH (1) CH536548A (it)
DE (2) DE2151453A1 (it)
FR (1) FR2153412B1 (it)
GB (1) GB1391919A (it)
IT (1) IT967686B (it)
SE (1) SE372131B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6057622A (en) * 1999-01-21 2000-05-02 Lockhead Martin Energy Research Corporation Direct control of air gap flux in permanent magnet machines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190990A (en) * 1961-10-16 1965-06-22 Allis Chalmers Mfg Co Explosive actuated switch
US3441093A (en) * 1967-06-19 1969-04-29 Profitable Resources Inc Jet perforating gun arming switch and circuitry
US3646292A (en) * 1970-05-11 1972-02-29 Gen Electric High-voltage electric circuit breaker with high-speed tripping means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190990A (en) * 1961-10-16 1965-06-22 Allis Chalmers Mfg Co Explosive actuated switch
US3441093A (en) * 1967-06-19 1969-04-29 Profitable Resources Inc Jet perforating gun arming switch and circuitry
US3646292A (en) * 1970-05-11 1972-02-29 Gen Electric High-voltage electric circuit breaker with high-speed tripping means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6057622A (en) * 1999-01-21 2000-05-02 Lockhead Martin Energy Research Corporation Direct control of air gap flux in permanent magnet machines

Also Published As

Publication number Publication date
JPS4839973A (it) 1973-06-12
CH536548A (de) 1973-04-30
GB1391919A (en) 1975-04-23
SE372131B (it) 1974-12-09
DE7139087U (de) 1973-11-22
IT967686B (it) 1974-03-11
DE2151453A1 (de) 1973-03-29
FR2153412A1 (it) 1973-05-04
FR2153412B1 (it) 1976-05-21
CA962727A (en) 1975-02-11

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