US2757255A - High-speed switch mechanism - Google Patents

High-speed switch mechanism Download PDF

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Publication number
US2757255A
US2757255A US308954A US30895452A US2757255A US 2757255 A US2757255 A US 2757255A US 308954 A US308954 A US 308954A US 30895452 A US30895452 A US 30895452A US 2757255 A US2757255 A US 2757255A
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US
United States
Prior art keywords
shaft
blade
switch
latch
spring
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
US308954A
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English (en)
Inventor
James B Owens
Jr Chester W Upton
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US308954A priority Critical patent/US2757255A/en
Priority to JP1638053A priority patent/JPS302217B1/ja
Application granted granted Critical
Publication of US2757255A publication Critical patent/US2757255A/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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor

Definitions

  • WITNESSES f4 77% 776a d pton,Jr.
  • a switch for grounding the power circuit to one side of the transformer, thereby causing positive tripping of the high-voltage circuit breaker which may be located some distance from the transformer.
  • the grounding switch is normally latched open and spring biased to the closed position.
  • the latch is tripped by a solenoid which is energized through the contact members of a differential relay. It is desirable that the switch close at a high speed and that rebounding of the switch blade upon closing be prevented.
  • An object of our invention is to provide a grounding switch which shall be simple and efficient in operation and which may be economically manufactured and installed.
  • a more specific object of our invention is to provide a high-speed actuating mechanism for a switch of the blade type having a rotatable operating shaft.
  • Another object of our invention is to provide a resetting mechanism for a spring-actuated switch.
  • a further object of our invention is to prevent rebounding of the switch blade upon closing.
  • Still another object of our invention is to provide a spring-biased switch which is latched in both the open and the closed positions.
  • the switch blade of a grounding switch is actuated by a rotatable shaft having a lever arm secured thereto.
  • the lever is connected to a spring assembly which is compressed when the blade is in the open position and is held under compression by a primary latch carried by an arm secured to a sleeve which is coaxial with the shaft for the blade.
  • the latch is released by a lever actuated by a tripping solenoid and the spring rotates the shaft to close the switch blade.
  • a secondary latch engages the lever on the shaft to prevent rebound upon closing and to hold the blade closed.
  • the mechanism is reset by rotating the sleeve and the primary latch arm in one direction to cause the secondary latch to be disengaged from, and the primary latch engaged to the shaft lever and the spring assembly.
  • the sleeve is then rotated in the opposite direction to open the switch blade and compress the closing spring.
  • Figure 1 is a view, in side elevation, of a grounding switch embodying the principal features of the invention
  • Fig. 2 is an enlarged view, in plan, of a portion of the actuating mechanism for the switch
  • Fig. 3 is an enlarged view, in side elevation, of the structure shown in Fig. 2, the mechanism being shown in a position corresponding to the open position of the switch blade;
  • Fig. 4 is a view, similar to Fig. 3, showing the mechanism in a position corresponding to the closed position of the switch blade;
  • Fig. 5 is a view, similar to Figs. 3 and 4, showing the mechanism in position to reset the switch, and
  • Fig. 6 is an enlarged view, in perspective, of the lever for connecting the spring assembly to the blade shaft.
  • the structure shown therein comprises a switch blade 10 which is disposed to engage stationary contact members 11 supported by an insulator stack 12 mounted upon a base 13.
  • the base 13 may be supported by a suitable structural framework (not shown).
  • the switch blade 10 may be utilized for grounding a power circuit when closed. Accordingly, the blade is normally in the open position, as shown by the full lines in Fig. 1. As shown, the blade 10 may be so mounted that it travels approximately between the open and the closed positions.
  • the blade 10 is normally retained in the open position and is biased to the closed position by a spring assembly or other suitable energy-storing means which will be described more fully hereinafter.
  • the blade 10 is also retained in the closed position and may be reset by a resettting mechanism which is enclosed in a housing 14 which is mounted upon the base 13.
  • the resetting mechanism may be manually operated by a handle 15 which is pivotally connected to a vertical shaft 16 rotatably mounted in bearing supports 17 which may be attached to the framework for supporting the base 13.
  • the shaft 16 is connected to one end of a horizontally disposed rod 18 through a crank arm 19.
  • the other end of the rod 18 is connected to a lever arm 22.
  • the arm 22 is connected to a rotatable sleeve which is part of the operating mechanism for the switch, as will be described more fully hereinafter.
  • the handle 15 may be raised to a substantially horizontal position when it is desired to operate the resetting mechanism.
  • the handle is utilized to rotate the vertical shaft 16, thereby operating the mechanism, as will be described hereinafter.
  • the handle 15 may be locked in the position shown by the full lines by means of a padlock (not shown).
  • the operating mechanism for the switch blade 10 comprises a rotatable shaft 25having an arm 26 secured thereto and to which the blade 10 may be attached.
  • One end of the shaft 25 is mounted in a sleeve 27 which is rotatably disposed in a bearing member 28 mounted in the housing 14.
  • the other end of the shaft 25 may be supported by a suitable bearing bracket (not shown) which may be mounted on the base 13.
  • one end 29 of the sleeve 27 is attached to the lever arm 22, shown in Fig. l.
  • a lever arm 31 is secured to the shaft 25.
  • the lever arm 31 comprises a pair of spaced arms 32 having holes 33 at one end thereof for receiving the shaft 25 and holes 34 at the other end thereof for receiving a pin 35.
  • the arms 32 may be welded to a spacing member 36 and an additional arm 37 may be welded to another spacing member 38.
  • the arm 37 is provided with a hole 39 for receiving one end of the pin 35, as shown more clearly in Fig. 2.
  • the pin 35 connects the lever arm 31 to a spring assembly 41.
  • the spring assembly 41 comprises a coil spring 42 which surrounds a telescoping guide rod 43.
  • One member of the rod 43 is attached to the pin 35 by a connector 44 and the other member is pivotally attached to a back plate 45 of the housing 14 by a pin 4s.
  • the spring 42 is disposed between a seat 47 on the connector dd and a square nut 48 which is threaded on the outer member of the telescoping guide 43. in this manner the compression of the spring 42 may be adjusted by means of the threaded nut 48.
  • the spring assembly 41 is retained in the compressed or loaded position by means of a primary latch 51 or other releasable device which is carried by a latch arm 52, one end of which is secured to the sleeve 27.
  • the latch arm 52 comprises a pair of spaced members 53 between which the latch 51 is mounted on a pin 54.
  • the latch 51 has a curved end '55 which is normally biasedagainst the sleeve 27 by a spring 56.
  • the latch 51 has a'ho ok portion 57 which engages the pin 3% to retain the spring 42 in the compressed position.
  • the primary latch 51 may be disengaged from the pin 35 by a tripping lever 58 which is actuated by a remotelycontroll'ed'device, such as a core 59 of a solenoid mechanism 61'having a coil 62.
  • the solenoid mechanism may be mounted on a bracket 63 which is attached to the back plate 45 of the housing 14.
  • the solenoid coil 62 may be energized through the contact members of a differential relay or other protective device located remotely from the switch mechanism.
  • the grounding switch 65 comprises a bar 66, one end of which is pivotally mounted on a pin 67 disposed in a bracket 68 in the housing 14.
  • the bar 66 is biased upwardly by a spring 69, the upward travel being limited by a corner 71 of the bar engaging the bracket 68.
  • the sleeve 27 In order to reset the mechanism after an automatic operation, the sleeve 27 is rotated in a counterclockwise direction, thereby causing the latch arm 52 to carry the primary latch 51 downwardly from the position shown in Fig. 4 to the position shown in Fig. 5. As explained hereinbefore, the sleeve 27 may be rotated counterclockwise by means of the manually-operated handle 15. As the latch arm 52 moves downwardly, the end of one of the memers 53 engages the secondary latch bar 66, thereby lowering the bar to disengage the pin 35. At the end of the downward travel of the latch arm 52, the hook 57 on the primary latch 51 engages the pin'35, as shown in Fig. 5.
  • the sleeve 27 is then rotated clockwise by means of the handle 15 to open the switch blade ill and compress the spring 42.
  • the spring 42 When the spring 42 is fully compressed, the members of the actuating mechanism are returned to the positions shown in Fig. 3.
  • the handle 15 may be locked in the position shown by the full lines in Fig. 1, thereby retaining the members in the positions shown in Fig. 3 until the primary latch 51 is released by operation of the tripping solenoid 61.
  • An adjustable screw 75 is disposed to engage a shoulder 76 upon one of the members 53 on the latch arm 52 to stop the upward travel of the latch arm as the switch blade is returned to its open position.
  • the screw 75 is disposed in a member 77 of the housing 14.
  • An electrical heating device 73 may be mounted in the housing lid on supports 79 to prevent condensation from taking place in the housing.
  • the stationary contact structure 11 is preferably of the semi-enclosed type having a hood over the contact members to protect them from ice accumulations.
  • a switch in combination, a rotatable shaft, a switch blade secured to the shaft and movable in an are as the shaft is rotated, a spring assembly, a lever arm connecting the spring assembly to the shaft, a primary latch engaging the lever arm to hold the spring compressed, electrically operated means for disengaging said latch to release the spring to rotate the shaft and actuate the blade to closed position, a secondary latch engaging the lever arm to retain the blade in the closed position, and manually operable means for first rotating the primary latch about the shaft in one direction to engage the lever arm and then in the other direction to rotate the shaft to open the switch blade and compress the spring at the same time.
  • a switch in combination, a rotatable shaft, a switch blade actuated by rotation of the shaft to open and closed positions, a spring assembly, a lever arm having one end secured to the shaft, a pin connecting the other end of the lever arm to the spring assembly, a primary latch engaging the pin to hold the spring compressed, an electrically actuated lever for disengaging said latch to release the spring to rotate the shaft and actuate the blade to the closed position, a secondary latch engaging the pin to retain the blade in the closed position, and manually operable means for first actuating the primary latch in one direction to engage the'pin and then in the other direction to rotate the shaft to open the switch blade and compress the spring with the same operation.
  • a switch in combination, a rotatable shaft, a switch blade actuated by rotation of the shaft to open and closed positions, a spring assembly, a lever'arm having one endsecured to the shaft, a pin connecting the other end of the lever arm to the spring assembly, a primary latch'engaging the pinto hold the spring compressed, an electrically actuated lever for disengaging said latch to release the spring to rotate the shaft and actuate the blade to the closed position, a spring-biased secondary latch engaging the pin to retain the blade in the closed position, and manually operable means for first rotating the primary latch in one direction to engage the pin and then in the other direction to rotate the shaft to open the switch blade and compress the spring at the same time, said secondary latch being disengaged from said pin through operation of the primary latch.
  • a switch in combination, a rotatable shaft, a switch blade actuated by the shaft to open and closed positions, a spring assembly, a lever arm connecting the spring assembly to the shaft, a rotatable sleeve surrounding the shaft, a latch arm secured to the sleeve and ro tatable about said shaft, a primary latch carried by the latch arm to compress the spring, tripping means for disengaging the primary latch to release the spring and actuate the blade to the closed position, a secondary latch for retaining the blade in the closed position, and manually operable means connected to said sleeve for first rotating said latch arm in one direction to release said secondary latch and engage the primary latch and then in the other direction to open the switch blade and compress the spring simultaneously with the opening of the switch blade.
  • a switch in combination, a rotatable shaft, a switch blade actuated by the shaft to open and closed positions, a spring assembly, a lever arm connecting the spring assembly to the shaft, a rotatable sleeve surrounding the shaft, a latch arm secured to the sleeve and rotatable about said shaft, a primary latch carried by the latch arm to load the spring, tripping means for disengaging the primary latch to release the spring and actuate the blade from one of said positions to the other, a springbiased secondary latch for retaining the blade in said other position, and mechanical means operable first in one direction to rotate the latch arm in one direction to release the secondary latch and engage the primary latch, said mechanical means being then operable in another direction to rotate the latch arm in the other direction to actuate the blade to its first position and reload the spring.
  • a switch in combination, a rotatable shaft, a switch blade actuated by the shaft to open and closed positions, a spring assembly, a lever arm having one end secured to the shaft, a pin connecting the other end of the lever arm to the spring assembly, a rotatable sleeve surrounding the shaft, a latch arm secured to the sleeve and rotatable about the shaft, a primary latch carried by the latch arm and engaging the pin to load the spring, tripping means for disengaging the primary latch from the pin to release the spring and actuate the blade from one of said positions to the other, a spring-biased secondary latch for retaining the blade in said other position, and mechanical means operable first in one direction to rotate the latch arm in one direction to release the secondary latch and engage the primary latch, said mechanical means being then operable in the opposite direction to rotate the latch arm in the opposite direction to actuate the blade to its first position and reload the spring.
  • a switch in combination, a rotatable shaft, a switch blade actuated by the shaft to open and closed positions, a spring assembly, a lever arm having one end secured to the shaft, a pin connecting the other end of the lever arm to the spring assembly, a rotatable sleeve surrounding the shaft, a latch arm secured to the sleeve and rotatable about the shaft, a primary latch carried by the latch arm and engaging the pin to load the spring, tripping means for disengaging the primary latch from the pin to release the spring and actuate the blade from one of said positions to the other, a spring biased secondary latch for engaging said pin to retain the blade in said other position, and manually operable means connected to the sleeve for first rotating the latch arm in one direction to disengage the secondary latch from the pin and engage the primary latch on the pin and then in the opposite direction to actuate the blade to its first position and reload the spring at the same time.
  • a stationary contact member a rotatable shaft, a movable switch blade secured to the shaft and engageable with the stationary contact member, energystoring means for moving the switch blade toward the stationary contact, a releasable device controlling operation of the energy-storing means, a remotely-controlled device operable to actuate said releasable device and release energy of the energy-storing means to rotate the shaft and move the switch blade to engage the stationary contact, a second releasable device for holding said switch blade in engagement with the stationary contact and opposing rebound therefrom at the end of its movement toward the stationary contact, and an operating member for opening the switch blade and resetting the first said releasable device with the same direction.
  • a stationary contact member a rotatable shaft, a movable switch blade secured to the shaft and engageable with the stationary contact member, energystoring means for moving the switch blade toward the stationary contact, a releasable device controlling operation of the energy-storing means, a remotely-controlled device operable to actuate said releasable device and release ener y of the energy-storing means to rotate the shaft and move the switch blade to engage the stationary contact, a second releasable device for holding said switch blade in engagement with the stationary contact and opposing rebound therefrom at the end of its movement toward the stationary contact, and resetting means operable first in one direction to release said second releasable device and then in the opposite direction to reset the first said releasable device.
  • a switch a stationary contact member, a rotatable shaft, a switch blade secured to the shaft and movable into and out of engagement with the stationary contact member, energy-storing means for moving said switch blade, a releasable device controlling operation of the energy-storing means, a remotely-controlled device operable to actuate said releasable device and release energy of the energy-storing means to rotate the shaft and move the switch blade, a second releasable device for holding the switch blade at the end of its movement, and an operating member for opening the switch blade and loading the energy-storing means and resetting the first said releasable device with one operation.
  • a switch a stationary contact member, a rotatable shaft, a switch blade secured to the shaft and movable into and out of engagement with the stationary contact member, energy-storing means for moving said switch blade, a releasable device controlling operation of the energy-storing means, a remotely-controlled device operable to actuate said releasable device and release energy of the energy-storing means to rotate the shaft and move the switch blade, a second releasable device for holding the switch blade at the end of its movement, and an operating member movable first in one direction to release said second releasable device and then movable in the opposite direction to load the energy-storing means and reset the first said releasable device.
  • a switch in combination, a rotatable shaft, a switch blade actuated by rotation of the shaft to open and closed positions, energy-storing means for rotating the shaft, a releasable device controlling operation of the energy-storing means, a remotely-controlled device operable to actuate said releasable device and release energy of the energy-storing means to rotate the shaft to actuate the blade to the closed position, a second releasable device for retaining the blade in the closed position and opposing rebound therefrom, and an operating member for opening the switch blade and resetting the first said releasable device at the same time.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US308954A 1952-09-11 1952-09-11 High-speed switch mechanism Expired - Lifetime US2757255A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US308954A US2757255A (en) 1952-09-11 1952-09-11 High-speed switch mechanism
JP1638053A JPS302217B1 (en, 2012) 1952-09-11 1953-09-10

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Application Number Priority Date Filing Date Title
US308954A US2757255A (en) 1952-09-11 1952-09-11 High-speed switch mechanism

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US2757255A true US2757255A (en) 1956-07-31

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JP (1) JPS302217B1 (en, 2012)

Cited By (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
US3316366A (en) * 1965-02-11 1967-04-25 Westinghouse Electric Corp Operating mechanisms for electric switch structures
FR2716747A1 (fr) * 1994-02-28 1995-09-01 Gen Electric Dispositif de ressort de fermeture de disjoncteur, disjoncteur muni d'un tel dispositif et procédé de montage de ce disjoncteur.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1771421A (en) * 1928-09-26 1930-07-29 Asea Ab Operating mechanism for circuit breakers
US2644053A (en) * 1951-02-10 1953-06-30 Westinghouse Electric Corp High-speed circuit breaker operating mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1771421A (en) * 1928-09-26 1930-07-29 Asea Ab Operating mechanism for circuit breakers
US2644053A (en) * 1951-02-10 1953-06-30 Westinghouse Electric Corp High-speed circuit breaker operating mechanism

Cited By (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
US3316366A (en) * 1965-02-11 1967-04-25 Westinghouse Electric Corp Operating mechanisms for electric switch structures
FR2716747A1 (fr) * 1994-02-28 1995-09-01 Gen Electric Dispositif de ressort de fermeture de disjoncteur, disjoncteur muni d'un tel dispositif et procédé de montage de ce disjoncteur.

Also Published As

Publication number Publication date
JPS302217B1 (en, 2012) 1955-03-31

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