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US2282153A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2282153A
US2282153A US375968A US37596841A US2282153A US 2282153 A US2282153 A US 2282153A US 375968 A US375968 A US 375968A US 37596841 A US37596841 A US 37596841A US 2282153 A US2282153 A US 2282153A
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US
United States
Prior art keywords
valve
contact
piston
fluid
operating
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
US375968A
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English (en)
Inventor
Benjamin P Baker
Andrew H Bakken
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing Co
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
Priority to NL105709D priority Critical patent/NL105709C/xx
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US375968A priority patent/US2282153A/en
Priority to GB363/42A priority patent/GB552608A/en
Application granted granted Critical
Publication of US2282153A publication Critical patent/US2282153A/en
Priority to CH252897D priority patent/CH252897A/de
Priority to FR938695D priority patent/FR938695A/fr
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic

Definitions

  • This invention relates to improvements in circuit interrupters, and more particularly to circuit interrupters of the iluid blast type suitable for high-voltage, high-power circuits.
  • a series connected disconnect switch preferably externally arranged, with respect to the interrupting element has been found to provide the extra insulation needed to effectively isolate the two parts of the connected circuit. Even though a disconnect switch provides an effective isolating break, some diillculty has been experienced in maintaining a high dielectric condition in the current interrupting gap without the continuous flow of arc extinguishing iluid on account of sparking across the short interrupting gap.
  • a more specic object of the invention is directed to the operating mechanism for current interrupters of the aforesaid type arranged to sequentially open the interrupting contacts and the isolating switch and finally short circuit the circuit interrupting break.
  • a further feature of our invention is directed to the provision of a fluid actuated operating mechanism of compact design for high-voltage circuit interrupters of the fluid blast type.
  • This feature includes arranging the mechanism for operating the contact structure adjacent to the contacts and maintaining it at line potential, whereas the control apparatus for such mechanism is maintained at ground potential.
  • Another object oi the invention resides in the provision of improved valve means for iiuid blast circuit interrupters for controlling the ow of iluid to the current interrupting break and the contact operating mechanism.
  • a more specific object of the invention contemplates such improvements in valve mechanism for the control of fluid in circuit inter-1 rupters of the fluid blast type that opening of the interrupter is prevented in the absence of a fluid blast at the interrupting contact structure.
  • the improved valve mechanism also makes provision vfor a positive opening operation of the interrupter arcing contact structure in the event that conilcting opening and closing control impulses are applied to the contact operating mechanism.
  • Figure 1 is a side elevation view showing a circuit interrupter which illustrates our invention
  • Fig. 2 is a fragmentary view in section showing a part of the disconnect switch mechanism of the circuit interrupter
  • Fig. 3 is a View partially in section showing the contact operating mechanism of our circuit interrupter
  • Fig. 4 is a top view at a reduced scale of the fluid actuated driving means forming a part oi' the contact operating mechanism shown in Fig. 3;
  • Fig. 5 is a sectional view of the driving means shown in Fig. 4 taken along the line V-V of that figure;
  • Fig. 6 is a view partially in section of the uid control valve assembly of the circuit interrupter
  • Fig. 7 is a view partially in section of the valve assembly shown in Fig. 6, as viewed along the line VII- VII of that gure;
  • Fig. 8 is a top view at a reduced scale of one of the fluid control valve mechanisms.
  • Fig. 9 is an enlarged sectional view of the valve mechanism of Fig. 8 taken along the lines
  • the reference numeral Ii indicates a framework which may be formed of. structural steel or other suitable material
  • Rising from the left-hand side of the framework ii are a plurality of insulators I3, i8 and i1, only the first two of which are shown in Fig. 1 and the latter two of which are shown in Fig. 5.
  • Supported upon the upper ⁇ end of the tripod formed by insulators i3, i5 and i1 is a casing i9 for housing an operating mechanism more clearly shown in Fig. 3.
  • the casing i9 supports an insulator 2i which, in turn, supports a circuit interrupting element 23.
  • An insulator 25 similar to insulator 2l extends upwardly from the circuit interrupting element 23 and has a metallic terminal cap 2l on its free end thereof. 'I'he insulator 25 is hollow for the purpose of receiving a stationary contact member 29 which extends downwardly from the terminal cap 21 into the circuit interrupting element 23.
  • a movable contact member 3i coacts with the stationary contact member 29 and extends from the lower end oi the stationary contact through the circuit interrupting element 23 and the insulator 2
  • extends into the casing
  • An electrical connection is made from the lower end of the moving contact 3
  • a second flexible connection 31 connects the terminal bolt 35 with the switch blade 39 of a disconnect switch generally indicated at 4
  • is'hlnged at 43 tov the end of an operating arm 45, pivotally mounted upon the casing i9.
  • the right-hand end of the blade 39 makes a high pressure contact with a U-shaped contact Jaw 41 supported from a terminal cap 49 forming a covering of a hollow insulator 5
  • may be supported from the right-hand end of the frame and serves as a housing for transformers or other suitable instruments necessary for the control of the circuit interrupter. interrupter are made to a terminal 55 carried by the terminal cap 21 and to a terminal 53 carried by terminal cap 49.
  • a current flow through the interrupter may proceed from the terminal 55.
  • is operated to the open circuit position while the interrupter is carrying a load, an arc will be drawn between the lower end of the stationary contact 29 and the moving contact.
  • Extinction of this arc may be accomplished by any suitable arc extinguishing means but preferably by an arc extinguisher of the fluid blast type which, for example, may be of the form more clearly shown and claimed in the copending application of L. R. Ludwig and B. P. Baker, Serial No. 373,856, illed January 9, 194i, and assigned to the assignee of this application.
  • an arc extinguishing unit 51 which is supplied with a blast of arc extinguishing fluid, such as compressed air, for example, will be suillcient for the purpose at hand.
  • to open and closed circuit positions in this instance is accomplished by an operating mechanism'housed within the casing i9 as more clearly shown in Fig. 3.
  • the operating mechanism comprises a main operating lever or rocker arm 59 ilxedly secured intermediate its ends to a shaft 9
  • the lett-hand end of the rocker arm 59 is coupled by a link 93 to the lower end of the moving contact member 3
  • the driving force for actuating the rocker arm 59 is obtained from a fluid driven piston 65 operative within a cylinder 81.
  • a connecting rod 99 secured to the piston 55 extends upwardly through the cylinder 61 and has its upper end coupled by a link 1
  • rocker arm 59 will be alternately rocked
  • External circuit connections to the i in a clockwise and then counterclockwise direc-A tion so as to move the contact member 3
  • rocker arm 59 is coupled by a link 15 to the upper end of a connecting rod 11 which, in turn, is coupled to a piston 19.
  • the piston 19 is operated in a cylinder 9
  • a ball check valve 83 is provided at the lower end o! the cylinder 9
  • the cushion of air under the piston 19 thus cushions the shock of the closing stroke and arrests the motion of the moving contact.
  • This cushion of air if not promptly relieved when the contact 3
  • a release valve is provided in the lower side of the cylinder 9
  • the operating mechanism within the casing i9 in addition to actuating the moving contact 3i to open and closed circuit positions also operates the switch blade 39 of the disconnect switch 4
  • is provided with a crank arm 99, the left-hand end of which is connected to one end of an L-shaped link 9
  • is pivotally connected to a relativelyshort crank arm 93 secured to a shaft 95 journaled within the casing
  • the shaft 95 extends through the opposite sides of the casing i9 and supports the operating arm 45 of the disconnectvswitch 4
  • the crank arm 99 will also be rotated in a counterclockwise direction. Movement of the arm 99 in this manner imparts a translatory motion to the link 9
  • FIG. 2 The pivotal connection of the blade 39 upon the actuating arm 45 is more clearly illustrated in Fig. 2.
  • the left-hand end of blade 39 is provided with a hollow portion 91 into which a quadrant like portion 99 oi' the actuating arm 45 extends.
  • the portions 91 and The other azsarss 93 are pivoted to each other by the pin 43.
  • the quadrant member 93 has a guide rod iUI pivoted thereto at
  • the guide rod IllI carries a compression spring and extends through a stop wall
  • 65 thus bears against the guide rod I0! at its left-hand end and against the stop wall Itl at its right-hand end so as to bias the switch blade 39 in a counterclockwise direction about the pivot pin 43 until a stop portion
  • the actuating arm and the blade 39 form a toggle between the shaft 93 and the jaw contact 41, the knee of the toggle being at the pivot pin 43 which is overcenter with respect to a line passing through the shaft 95 and the right-hand contact engaging end of the blade 39.
  • Rotation of the arm 45 in a counter-clockwise direction will break the toggle at the pin 43 and cause opening oi' the switch as follows:
  • the initial rotary movement oi the actuating arm .i5 in a counterclockwise direction causes the pin 43 to be moved to dead center which in addition to imparting a slight rocking movement to the blade 39 with respect to the contact 41 also causes the blade 39 to move a short distancesubstantially longitudinally to the right with respect to the contact 41.
  • translatory motion takes place in the opposite direction, which motion, however, is principally longitudinally of the blade and to the left so as to withdraw the right-hand end of the blade 39 from the jaw contact 41.
  • the actuating arm 45 will have assumed its full open position, as shown by the dotted lines in Fig. 1, in which position switch blade 39 is caused to engage a contact jaw I II carried by the upper terminal cap 21. In this position of the switch blade 39, an electrical connection is made from the stationary contact member 29, through the Jaw contact III, switch blade 39. flexible conductors 31 and 33 to the movable contact 3
  • the closing operation oi' the interrupter is effected by moving the piston upwardly and in all other respects the operation of the mechanism takes place in the reverse manner from that previously described lib with the exception that the biasing Spring of the switch blade 39 causes the blade to move rigidly with the operating arm 45 so that even though the blade 38 disengages from its contact III at about the time the moving Contact 3
  • the final closing operation of the interrupter then takes place through the disconnect switch 4I.
  • auxiliary switch H3 mounted upon the frame II is employed.
  • This switch may be of usual construction for controlling a signal light circuit and in addition may contain further control elements for controlling the sequence of operation of the several fluid control valves which will hereinafter be more fully described.
  • the auxiliary switch I I3, as shown more clearly on Figs. l and 6, has an operating arm H5 which is coupled by a rod II1 to a crank arm IIS.
  • the arm II9 is xed to a shaft I2I extending through a portion of a hollow conducting member
  • 25 Extending interiorly of the hollow member
  • 25 has pivoted thereto the lower end of a pull rod
  • 21 extends upwardly through the hollow support insulator I3 and into the casing I9 where it is surrounded by another hollow conducting member
  • 21 is fastened to a crank arm I3I carried by a shaft
  • crank arm is coupled by'means of a rod
  • the clockwise rotation of arm I3I will cause the pull rod
  • a relatively small rod cross section is employed. Owing to the length of the rod
  • a suitable tensioning device is provided by means of a spring I4I (Fig. 6) operative within a guide tube
  • the shaft I2I is always biased in the clockwise direction, as viewed in Fig. 6, thereby maintaining the pull rod
  • Fluid under pressure for extinguishing the arc and also for operating the piston 95 may be stored in a tank
  • the blast valve mechanism I5 I as more clearly shown in Fig. 6, comprises a valve housing
  • 55 is operated to open and closed positions by a rocker arm
  • 51 is actuated by a piston
  • 93 normally biases the piston IGI downwardly and holds the valve
  • 99 may be controlled by a solenoid
  • 41 is also utilized to actuate the contact operating piston 95 operative within the cylinder 91.
  • 49 is provided with two branch pipes
  • 15 leads to an opening valve mechanism generally indicated at
  • 19 is conducted through a pipe
  • 'I'he casing of the operating cylinder 91 (Fig. 5) is provided with a passage
  • 95 also communicates with the passage in the insulator I1 through an opening
  • the closing valve mechanism I9I controls the flow of uid from the pipe
  • 91 of the operating cylinder 91 has another passage
  • FIG. 9 Further details of the opening valve mechanism are shown in Fig. 9, in which the reference numeral
  • 99 has a stem 20
  • is actuated to the open position by a piston 205 operative within the housing
  • 15 is admitted to the upper side of the piston 205, through the passages 201 and 209. Control of the fluid through these passages is obtained by an electromagnetically actuated valve 2
  • Fluid under pressure then proceeds through the pipe
  • valve 2II When the valve 2II is closed. pressure is relieved on top of the piston 205 and the piston is moved to its upper or normal position by a spring 2
  • the piston 205 also has a sleeve 2
  • the sleeve 2 I9 uncovers the passage 22 I, thereby connecting the upper side of the operating piston 55 to atmosphere.
  • 51 has rigidly secured thereto a latch arm 223.
  • This latch arm extends laterally and upwardly with respect to the axis of the shaft
  • is generally similar to the openingvalve mechanism
  • This mechanism includes a valve housing 233 having a valve 235 operative adjacentthe lower end thereof.
  • the valve 235 also has a stem 231 that is spring actuated to the closed position.
  • the valve stem 231 however, in this instance has an extension 239, the purpose of which-will appear more fully hereinafter. Actuation .of the valve 235 to the open position is accomplished by a piston 24
  • is obtained by an electromagnetically controlled valve 243, includl operative within the valve housing 233 and sliding a solenoid 245.
  • a closing impulse is received, that is, when solenoid245 is energized.
  • a valve 243 opens to permit aV flow of fluid under pressure from the pipe ⁇
  • in this instance also controls ⁇ a bleed passage 241, through the valve housing 233 for Vthe pur-l pose or connecting the lower side. of the operating .piston 55 .to atmosphere at the end of a closing operation.
  • the upper end or the valve housing 233 is provided with a cylinder 24,9 into which the extension 239 of the valve stem 231 extends. Operative within the cylinder 249 and slidable about the extension 239 -is a piston 25
  • the extension 239 is provided with a stop such as a nut and washer arrangement 255, as shown. against which ,thepiston 25
  • the lower end of the cylinder The eiiective iluidpressure area of the piston 25
  • a switch blade arranged for movement to alternatelyV engage oneand then the other of said line terminal members, apair of arcing contacts one of which is connected to the iirst line terminal member and the other to said switch blade, said arcing contacts and said switch blade normally providing a series connection between said line terminal members when said switch blade is. in engagement with the second line terminal member, and operating means for first separating said arcing contacts to lntroduce a current interrupting break between said line terminal members and thereafter to move said switch blade into engagement with said iirst line terminal member for introducing an isolating break between the line terminal members and short circuit said arcing contacts.
  • a support insulator an arc extinguishing device carried by said insulator, said arc extinguishing device including a line terminal member andV a pair of separable contacts one of which is connected to said line terminal member, a switch blade hingedly carried by said arc extinguishing device and connected to the other of said separable contacts, av second support insulator having a second line terminal member thereon, said switch blade normally engaging said second line terminal member and coacting with said separable contacts to provide a series connection between said line terminal members, ⁇ and operating means for first separating said separable contacts to provide a current interrupting break and thereafter move said lswitch blade out of engagement with said second line terminal member to the open circuit position to provide an isolating break in the circuit, said therewith when said switch blade is moved to its full open circuit position so as to remove potentialfrom and then shortcircuit said arc extinguishing device.
  • separable contact means separable contact means, operating mechanism for operating said contact means to open and closed positions
  • support means including at least one tubular insulator for supporting said contact means and said operating mechanism at a predetermined potential above ground, contactl position indicating means maintained at substantially ground potential, and means of insulating material operative within said tubular insulator and actuable by said operating mechanism for actuating said contact position indicating means.
  • a circuit interrupter In a circuit interrupter, a base, a tubular insulator supported upon said base, an arc extinguishing device carried by said insulator, said arc extinguishing device including separable contact means for establishing a current interruptlng break and operating means for actuating said contact means to open and closed positions, said ⁇ -a pair of'line ter-w means- 8.'In a circuit interrupter., ofr the Yiluliceiblast ⁇ type, separable contact structure Iorestablishing an arc, fluid pressure actuated means for operating said contact structure, operating valve means controlling the supply of fluid underprelh ⁇ sure to said operating means, blast valve means for controllingthe supply of arc extinguishing fluid to said contacts, and means dependent upon the position of said blast valve means for-,con-
  • a circuit interrupter of the iiuid blast type separable contact structure for establishing an arc, operating means for moving said contact structure to open and closed positions, said operating means including a fluid actuated piston, an opening valve for controlling the supply of iiuid to one side. ⁇ of said pistonfor opening said contact structure, a. closing valve for controlling the supply 'of fluid to the other side of said Apiston to close said contact structure, a blast valve for controlling the supply of an extinguishing fluid to said contact structure, operating mechanism for opening said blast valveincluding a 'latch member, and operating mechanism for Asaid opening valve including a linkage ⁇ arranged'to be latched to said latch member when said blast valve. is closed for preventing movement of ⁇ said opening valve operating mechanism to the ⁇ open position, said latch memberV being movable in response to ⁇ movement of said blast valve to the open position to release said linkage to permit opening of said opening valve.
  • a circuit interrupter separable contact structure, operating means for moving said contact structure to open and closed -positions, said operating means including fluid actuated vpiston means, opening valve means for controlling the supply of fluid to one side of said piston means for opening said eontact'structure, closing valve means for controlling the supply of iluid to the other side of said piston means for closing said contact structure, and means responsive to the actuation of said opening valve means to the open position for holding said closing valve vmeans in the closed position.
  • a circuit'interrupter separable ⁇ contact structure
  • operating means for moving said contact structure to open and closed positions
  • said operating means including fluid actuated piston means, opening valve means for controlling the supply of fluid to one side of said piston means for opening said contact structure.
  • closing valve means for controlling the. supply of fluid to the other side of said piston means for closing said contact structure, and pressure responsive means 'associated with said closing valve means operating in 'response to the flow of fluid through said opening valve means for maintaining said closing valve means closed.
  • operating means for moving said contact structure to open and closed positions, said operating means including a fluid actuated piston.
  • valve means for controlling the supply of fluid to one side of said piston for opening said contact structure, valve means for controlling the supply of fluid to the other side of said piston for closing said contact structure, pressure actuated means for holding one of said valve means closed, and means operating in response to the ⁇ flow of fluid through the other of said valve means for supplying fluid to said pressure actuated means.
  • a circuit interrupter separable contact structure
  • operating means for moving said contact structure to open and closed positions
  • said operating means including a fluid actuated piston, opening and closing valve means for controlling respectively the supply of fluid to opposite sides of said piston for causing said contact structure to be moved to open and closcd positions, fluid actuated means for controlling each of said valve means, and a second fluid actuated means for providing an additional control' for said closing valve means, said second fluid actuated means being responsive to the flow of fluid through said opening valve means and operative to render said first iluid actuated means for said closing valve means inoperative to open said closing valve means.
  • a circuit interrupter a supporting frame, a tank carried by said frame for storing fluid under pressure, a plurality of tubular insulators supported upon said frame, a current interrupting contact structure and operating mechanism therefor supported upon said insulators, said operating mechanism including fluid pressure actuated piston means, at least two of said insulators having a iluid conducting passage therethrough, means including'said two insulators for conducting fluid from said tank to opposite sides of said piston means for moving said contact structure to open and closed positions, and valve means disposed at ground potential adjacent said tank for controlling the flow of fluid from said tank into said insulators.
  • a circuit interrupter a supporting frame, a tank carried by said frame for storing uid under pressure, a plurality of insulators supported upon said frame, a current interrupting contact structure and operating mechanism therefor supported upon said insulators, said operating mechanism including fluid pressure actuated piston means, means including said two insulators for conducting fluid from said tank to opposite sides of said piston means for moving said contact structure to open and closed positions, and valve means disposed at ground potential adjacent said tank for controlling the flow of uid from said tank into said insulators, means for conducting an arc extinguishing blast of fluid from said tank to said contact structure, said last named means including a third of said supporting insulators, and valve means disposed at ground potential between said tank and said ing contact structure and operating mechanismA therefor supported upon said insulators.
  • one of said insulators having a fluid conducting passage therethrough, means including said one insulator for conducting a blast of arc extinguishing fluid from said tank to said contact structure, an auxiliary switch disposed upon said frame, and a linkage operatively coupling said operating mechanism to said auxiliary switch, said linkage including a member of insulating material operative entirely within the fluid conducting passage in said one insulator.
  • support means including at least one tubular insulator for supporting said contact means and said operating mechanism at a potential above ground, said tubular insulator including a gas passage connected at its end at ground potential to a source of compressed gas for supplying compressed gas to the part of the circuit interrupter at a potential above ground, and means of insulating material extending through said gas passage and connected to be operated upon movement of said contact means to be responsive at its end at ground potential to said movement.
  • a compressed gas circuit interrupter separable contact means, voperating mechanism for operating said contact means to open and closed positions
  • support means including at least one tubular insulator for supporting said contact means and said operating mechanism at a potential above ground, said tubular insulator including a gas passage connected at its end at ground potential to a source of compressed gas for supplying compressed gas to the part of the circuit intenupter at a potential above ground, means of insulating material extending through said gas passage and connected to be operated upon move- A ment of said contact means to be responsive at its end at ground potential to said movement, and biasing means maintaining said means of insulating material in tension upon movement of said contact means to both open and closed positions.
  • a circuit interrupter a supporting frame, a tank carried by said frame for storing fluid under pressure, a plurality of. tubular insulators supported upon said frame, a current interrupting contact structure and a disconnecting switch member and operating mechanism for both said contact structure and disconnecting switch member all supported upon said insulators, said operating mechanism including fluid pressure actuated piston means, at least two of said insulators having a fluid conducting passage therethrough, means including said two insulators for conducting fluid from said tank to opposite sides of said piston means for moving said contact structure and said disconnecting switch member upon said frame, a current interrupting contact structure and a disconnecting switch member and operating' mechanism for both said contact structure and said disconnecting switch member all supported upon said insulators, said operating mechanism including fluid pressure actuated piston means, means including said two insulators for conducting iluid.
  • valve means disposed at ground potential adjacent said tank for controlling the flow of fluid from said tank into said insulators, means for conducting an arc-extinguishing blast of iiuid from said tank to said contact structure, said last-named means includingA a third of said supporting insulators. and valve means disposed at ⁇ ground potential between said tank and said third insulator for controlling the arc-extinguishing blast o f fluid to said contact structure.
  • a gas blast circuit interrupter a supporting frame, an insulator supported upon said frame and carrying a disconnecting contact and one line terminal of the circuit interrupter, a plurality of insulators supported upon said frame and spaced from the ilrst said insulator, a second line terminal and a current interrupting contact structure and a disconnecting switch member all mounted on said plurality of insulators, pneu- 'matic operating means for opening and closing ture, control valve meansior said pneumatic operating means also mounted at ground potential,
  • a supporting frame an insulator supported upon said frame and carrying a disconnecting contact and one line terminal oi the circuit interrupter, a plurality of insulators supported upon said frame and spaced from the irs't said insulator, a second line terminal and a current interrupting contact structure and a disconnecting switch member all mounted on said plurality of insulators, pneumatic operating means for opening and closing said current interrupting contact structure and for moving said disconnecting switch member into and out of engagement with ⁇ the disconnecting contact on the ilrst said insulator, a source of compressed gas and a blast valve on said supporting frame at ground potential and connected to one of said plurality oi' insulators for conducting gas therethrough to extinguish the arc drawn by said current interruptingcontact structure, an opening valve mounted at ground potential and connected to a second of said plurality of insulators to control the ilow of gas therethrough to said pneumatic operating means for opening both said current interrupting contact structure and said disconnecting switch member

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Mechanically-Actuated Valves (AREA)
US375968A 1941-01-25 1941-01-25 Circuit interrupter Expired - Lifetime US2282153A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL105709D NL105709C (de) 1941-01-25
US375968A US2282153A (en) 1941-01-25 1941-01-25 Circuit interrupter
GB363/42A GB552608A (en) 1941-01-25 1942-01-09 Improvements in or relating to electric circuit interrupters of the fluid blast type
CH252897D CH252897A (de) 1941-01-25 1946-01-28 Elektrischer Schalter.
FR938695D FR938695A (fr) 1941-01-25 1946-10-24 Interrupteurs de circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US375968A US2282153A (en) 1941-01-25 1941-01-25 Circuit interrupter

Publications (1)

Publication Number Publication Date
US2282153A true US2282153A (en) 1942-05-05

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ID=23483124

Family Applications (1)

Application Number Title Priority Date Filing Date
US375968A Expired - Lifetime US2282153A (en) 1941-01-25 1941-01-25 Circuit interrupter

Country Status (5)

Country Link
US (1) US2282153A (de)
CH (1) CH252897A (de)
FR (1) FR938695A (de)
GB (1) GB552608A (de)
NL (1) NL105709C (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422805A (en) * 1943-04-17 1947-06-24 Ite Circuit Breaker Ltd Air blast circuit breaker
US2447656A (en) * 1944-05-24 1948-08-24 Westinghouse Electric Corp Compressed gas-operated circuit interrupter with position indicator
US2464237A (en) * 1943-05-24 1949-03-15 Allis Chalmers Mfg Co Fluid pressure actuated switch
US2491945A (en) * 1945-11-13 1949-12-20 Westinghouse Electric Corp Circuit interrupter
US2548221A (en) * 1949-02-15 1951-04-10 Allis Chalmers Mfg Co Fluid pressure actuated switch
US2552358A (en) * 1948-04-20 1951-05-08 Electr & Allied Ind Res Ass Electric circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8304325A (nl) * 1983-12-15 1985-07-01 Thiel Van Nv Harkgereedschap.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422805A (en) * 1943-04-17 1947-06-24 Ite Circuit Breaker Ltd Air blast circuit breaker
US2464237A (en) * 1943-05-24 1949-03-15 Allis Chalmers Mfg Co Fluid pressure actuated switch
US2447656A (en) * 1944-05-24 1948-08-24 Westinghouse Electric Corp Compressed gas-operated circuit interrupter with position indicator
US2491945A (en) * 1945-11-13 1949-12-20 Westinghouse Electric Corp Circuit interrupter
US2552358A (en) * 1948-04-20 1951-05-08 Electr & Allied Ind Res Ass Electric circuit breaker
US2548221A (en) * 1949-02-15 1951-04-10 Allis Chalmers Mfg Co Fluid pressure actuated switch

Also Published As

Publication number Publication date
NL105709C (de) 1900-01-01
FR938695A (fr) 1948-10-21
GB552608A (en) 1943-04-15
CH252897A (de) 1948-01-31

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