CA1140967A - Power driven group operated circuit disconnect apparatus for overhead electric power lines - Google Patents
Power driven group operated circuit disconnect apparatus for overhead electric power linesInfo
- Publication number
- CA1140967A CA1140967A CA000350033A CA350033A CA1140967A CA 1140967 A CA1140967 A CA 1140967A CA 000350033 A CA000350033 A CA 000350033A CA 350033 A CA350033 A CA 350033A CA 1140967 A CA1140967 A CA 1140967A
- Authority
- CA
- Canada
- Prior art keywords
- housing
- shaft
- power control
- combination
- crank arm
- 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
Links
Landscapes
- Transmission Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A group operated circuit disconnect apparatus for overhead electric power lines has a base in the form of a box-like housing which mounts on a pole, an upright shaft extends through the housing, and a transverse shaft also extends through the housing. A linkage is mounted on the shafts in the housing so that axial rotation of the transverse shaft axially rotates the upright shaft, and this causes three circuit disconnect switches mounted on the housing to be moved simultaneously between closed positions and open positions, or vice versa. An electric motor driven screw and nut drive subassembly for the transverse shaft is mounted in the housing; and the ends of the housing have removable closure plates for access to the linkage and for removal of the subassembly.
A group operated circuit disconnect apparatus for overhead electric power lines has a base in the form of a box-like housing which mounts on a pole, an upright shaft extends through the housing, and a transverse shaft also extends through the housing. A linkage is mounted on the shafts in the housing so that axial rotation of the transverse shaft axially rotates the upright shaft, and this causes three circuit disconnect switches mounted on the housing to be moved simultaneously between closed positions and open positions, or vice versa. An electric motor driven screw and nut drive subassembly for the transverse shaft is mounted in the housing; and the ends of the housing have removable closure plates for access to the linkage and for removal of the subassembly.
Description
114~67 POWER DRIVEN GROUP OPERATED CIRCUIT DISCONNECT
APPARATUS FOR OVER~EAD ELECTRIC POWER LINES
BAC~GROUND OF THE INVENTION
Overhead electric power distribution lines require circuit disconnect means at cextain locations; an~ since such distribution lines commonly operate in a three-phase system, there are three associated lines which ordinarily must be disconnected and reconnected sLmultaneously. This requires group operated switches, and for safety and convenience during servicing of the lines, it is desirable that a person be able to open and close the circuit disconnect means on the overhead lines from ground level or from a remote central terminal.
The present invention is a power driven version of the group operated circuit disconnect apparatus of my U.S.
patent 4,095,061.
~ here are power operated oil break units for remote switching of electric power transmission lines. The purpose of such units is generally to isol'ate a fault such as a short circuit. They are dangerous for a person working on the lin,es because the switches are concealed from view so there is no visual indication of whether they are open or clos~d.
In general, pr.or art power driven circuit dis-connect apparatus which can be controlled either from theground or f,rom a remote central terminal has been mechanically very complex and has also been expensive.
: -2- q ..,..
~14~967 SUMMARY OF THE INVENTI02~
The invention in one aspect pertains to an electric circuit disconnect apparatus which has a base, a shaft means rotatably mounted on said base, and a disconnect switch blade moved between closed and open positions by rotation of the sha~t means. A power drive is provided for rotating the shaft means and includes in combination a power unit which has a reversible rotary shaft, with a crank arm on the shaft means and a driving connection between the reversible rotary shaft and the crank arm, the driving connection including a drive screw rotated by the reversible rotary shaft. A member pivotally connected to the crank arm has a threaded mounting on the drive screw so that it is linearly reciprocated by rotation of the drive screw, and connecting means is between the reversible rotary shaft and the drive screw which permits the latter to pivot in the plane of movement of the crank arm so as to compensate for the difference between the linear reciprocation of the pivotally connected member and the arcuate movement of the crank arm. Power control means is provided for starting the power unit, and 2n additlonal power control means provides for automatically stopping the power unit effectively simultaneously with arrival of the switch blade at fully closed position and at fully open position.
- 114~)967 , THE DRAWINGS
Fig. 1 is a side elevational view of a power driven group operated circuit disconnect apparatus em-bodying the invention, with a control box shown partly in section;
Fig. 2 is a fragmentary longitudinal horizontal sectional view on an enlarged scale take substantially as indicated along the line 2-2 of Fig, l;
Fig. 3 is a fragmentary longitudinal vertical sectional ~iew with parts broken away, taken substantially as indicated along the line 3-3 of Fig. 2; and Fig. 4 is a fragmentary transverse sectional view taken substantially as indicated along the line 4-4 o Fig. 2 with parts omitted for clarity.
DETAILED DESCRIPTION OF THE INVEMTION
Referring to the drawings in detail, and referring ~irst to Fig. 1, a pole, indicated generally at P, has an upper end U to which a mounting bracket 8 is attached; and bolted to the upper end of the bracket 8 is ]0 an angle bracket 9 to which is secured the circuit dis-connect apparat~s of the present invention, which is in-dicated generally at 10.
The apparatus 10 includes a base, indicated generally at 11, which consists of a box~ e housing having side walls 12 and 13, a bottom wall 14 and a top wall 15.
The base 11 has removable closurés 16 and 16a at its ends.
Extending through the base 11 is an upright shaft means, indicated generally at 17, and transverse shaft means, indicated generally at 18. A first disconnect switch, indicated generally at l9a, surmounts the hase 11 ,.
and is operated by rotation of the upright shaft means 17; while a second disconnect switch l9b is mounted upon the base side wall 12, and a third disconnect switch (not shown) is mounted on the sidewall 13. Both of said last named disconnect switches are operated by rotation of the transverse shaft means 18.
'; A mechanical connection, indicated generally at 20, interconnects the upright shaft means 17 and the transverse shaft means 18 so that the two shaft means ro-tate simultaneously and equally.
` The shaft means 17 and 18 and the mechanical connection 20 are fully described in U.S. patent 4,095,061-so no detailed description is given here.
- The power drive for the circuit disconnect ap-paratus consists of a subassembly, indicated generally at 21, which i~ best seen in Figs. 2 and 3. A base plate 22 ls secured to the housing bottom wall 14 by a pair o hex-headed machine screws 22a which screw into threaded holes in the base plate; and mounted upon the base plate is a terminal block 23; ~otor m~ounting brackets 24; and a bridge frame, indicated generally at 25.
The mdunting brackets 24 support a fractional horsepower A.C. motor 26 which may, for example, be 0.5 h.p.
A motox shaft 27 is provided with a flexible coupling 28; 25 and a threaded shaft 29 has one end connected to the flex-i~le coupliny 28.
The bridge frame 25 consists of an upriqht support block 30 and an upright bearin~ block 31 which are surmounted by parallel rails 32 and 33. An opening in the support block 30 accommodates the Guter end portion of the flexible coupling 28; and the bearing block 31 serves - 114~67 as a mounting for a flanged bearing 34 which rotatably receives a coupling 35 which carries the outer end of the threaded shaft 29 and is a part of an assembly in-cluding the threaded shaft 29 and is a part of an as-sembly including a universal joint 36. The assembly of the coupling 35 and the universal joint 36 also includes a coupling 37 to which the inner end of a power screw 38 is fixedly secured.
As best seen in Figs. 3 and 4, the power drive is operatively connected to the transverse shaft means 18 by a threaded drive nut 39 which is adapted to travel along the power screw 38, and a crank yoke, indicated generally at 40. The crank yoke includes a collar member 41 which is fixedly secured to the shaft 18 and has an off-set crank arm 42, and a yoke arm 43 which includes a mounting portlon 44 and an offset yoke portion, so integral trunnlons 45 on the threaded drive nut 39 may be recelved ln holes ln the offset crank arm 42~and the offset yoke portion 43, and the crank assembly 40 can be dlsconnected from the drlve nut 39 by removing a machine screw 46 by which the offset crank arm and the offset yoke arm are secured together.
From the foregoing descriptlon, it is apparent that the entire power subassembly 21 may be removed from the housing 11 by removing the end closures 16 and 16a, removing the machine screw 46 and disengaging the trunnions 45 from the crank member 40, and removing the machine screws 22a that secure the subassembly to the housing bottom wall 14.
It is also necessary, of course, to disconnect from the ter-~0 minal block 23 an electrical cable 47 which extends through a hole in the housing side wall 12 and has a lower end connected i7 to a control box 48 which is near ground level on the post P. A flanged rubber sealing collar 49 snugly grips the cable 47 and makes a tight sealing fit in the hole in the housing side wall 12.
Mounted upon the bridge frame rail 32 are limit switches 50 and 51 which are seen in Fig. 2 to have respec-tive actuator arm follower rollers 50a and 51a extending into the space above an opening between the rails 32 and 33 where they may be contacted by a threaded traveler 52 which is mounted upon the threaded shaft 29 and has an up-per actuating portion 53 above the horizontal plane of the rails 32 and 33 where it has first and second actuating cam faces 53a and 53b which may contact the limit switch follower rollers 50a and 51a, respectively, as the traveler 52 moves back and forth responsive to rotation of the threaded shaft 29.
In the drawings the traveler 52 is seen to be in contact with the follower roller 51a of the limit switch 51, which is therefore a switch that stops operation of the motor 26 when the disconnect switches are fully closed.
The limit switch 50, therefore, serves to stop operation of the motor 26 when the disconnect switches reach their fully open positions.
In order that the present apparatus may be readily converted from manual to power operation, the lower end of the shaft means 17 has a removable cap 54 (Fiys. 3 and 4) which has holes 55 in its side wall that align wi-th a bore in the lowex end portion of the shaft means 17. W~len the cap 54 is removed a manual operating crank shaft may be operatively connected to the lower end of the shaft means 17 by a pin extending through the bore as taught in my United States patent 4,095,061.
114~967 A safety stop bracket 56 alongside the cap 54 has a hole 57 which is in the same horizontal plane as the holes 55 and the aligned bore of the shaft means 17. The disconnect switches, of course rotate 90 from the enclosed position of Fig. l to a fully open position;
-' so when the switches are open the bore in the shaft 17 and the aligned holes 55 in the cap 54 are also aligned with the hole 57, permitting insertion of a re~aining pin through the bore and through the holes 55 and 57 to mechan-ically lock the disconnect switches in their open positions for the added safety of anybody working on the line.
The control box 48 contains a switch 47a for starting the motor 26; and in case the circuit discon-nect apparatus i5 also intended for control from a central point, as is increasingly the case in major power distribu-tion syste,ms, the control box 48 must also, of course, have a terminal to the central control system with an interlock which permits a person working on the line to disable the cen1ral control hook-up to,elimina'ce the possibility that zo the switch may be closed from the switching center while he is working on the line.
When the power drive has an A.C. motor as here described, it is easily driven either to open or close _~ the disconnect switches by a 110 volt energizing circuit from the power line. On the other hand, where a direct current motor is used the control box must also contain a transformer and storage batteries to furnish a direct curxent source for energizing the motor, which may be as srnall as 0.25 h.p. There is some advantage in direct cur-rent operation in the event of a powe~ failure, because 114~967 -current batteries, which are kept constantly charged, can reliably open and close the switches as much as 25 or 30 times, even if the power is off. However, the A.C. opera-ting system is, of course, simpler and much less expensive.
The foregoing detailed description is given for ~ clearness of understanding only, and no unnecessary limita-tions should be understood therefrom, as modifications will be obvious to those skilled in the art.
. .. .
_, ,
APPARATUS FOR OVER~EAD ELECTRIC POWER LINES
BAC~GROUND OF THE INVENTION
Overhead electric power distribution lines require circuit disconnect means at cextain locations; an~ since such distribution lines commonly operate in a three-phase system, there are three associated lines which ordinarily must be disconnected and reconnected sLmultaneously. This requires group operated switches, and for safety and convenience during servicing of the lines, it is desirable that a person be able to open and close the circuit disconnect means on the overhead lines from ground level or from a remote central terminal.
The present invention is a power driven version of the group operated circuit disconnect apparatus of my U.S.
patent 4,095,061.
~ here are power operated oil break units for remote switching of electric power transmission lines. The purpose of such units is generally to isol'ate a fault such as a short circuit. They are dangerous for a person working on the lin,es because the switches are concealed from view so there is no visual indication of whether they are open or clos~d.
In general, pr.or art power driven circuit dis-connect apparatus which can be controlled either from theground or f,rom a remote central terminal has been mechanically very complex and has also been expensive.
: -2- q ..,..
~14~967 SUMMARY OF THE INVENTI02~
The invention in one aspect pertains to an electric circuit disconnect apparatus which has a base, a shaft means rotatably mounted on said base, and a disconnect switch blade moved between closed and open positions by rotation of the sha~t means. A power drive is provided for rotating the shaft means and includes in combination a power unit which has a reversible rotary shaft, with a crank arm on the shaft means and a driving connection between the reversible rotary shaft and the crank arm, the driving connection including a drive screw rotated by the reversible rotary shaft. A member pivotally connected to the crank arm has a threaded mounting on the drive screw so that it is linearly reciprocated by rotation of the drive screw, and connecting means is between the reversible rotary shaft and the drive screw which permits the latter to pivot in the plane of movement of the crank arm so as to compensate for the difference between the linear reciprocation of the pivotally connected member and the arcuate movement of the crank arm. Power control means is provided for starting the power unit, and 2n additlonal power control means provides for automatically stopping the power unit effectively simultaneously with arrival of the switch blade at fully closed position and at fully open position.
- 114~)967 , THE DRAWINGS
Fig. 1 is a side elevational view of a power driven group operated circuit disconnect apparatus em-bodying the invention, with a control box shown partly in section;
Fig. 2 is a fragmentary longitudinal horizontal sectional view on an enlarged scale take substantially as indicated along the line 2-2 of Fig, l;
Fig. 3 is a fragmentary longitudinal vertical sectional ~iew with parts broken away, taken substantially as indicated along the line 3-3 of Fig. 2; and Fig. 4 is a fragmentary transverse sectional view taken substantially as indicated along the line 4-4 o Fig. 2 with parts omitted for clarity.
DETAILED DESCRIPTION OF THE INVEMTION
Referring to the drawings in detail, and referring ~irst to Fig. 1, a pole, indicated generally at P, has an upper end U to which a mounting bracket 8 is attached; and bolted to the upper end of the bracket 8 is ]0 an angle bracket 9 to which is secured the circuit dis-connect apparat~s of the present invention, which is in-dicated generally at 10.
The apparatus 10 includes a base, indicated generally at 11, which consists of a box~ e housing having side walls 12 and 13, a bottom wall 14 and a top wall 15.
The base 11 has removable closurés 16 and 16a at its ends.
Extending through the base 11 is an upright shaft means, indicated generally at 17, and transverse shaft means, indicated generally at 18. A first disconnect switch, indicated generally at l9a, surmounts the hase 11 ,.
and is operated by rotation of the upright shaft means 17; while a second disconnect switch l9b is mounted upon the base side wall 12, and a third disconnect switch (not shown) is mounted on the sidewall 13. Both of said last named disconnect switches are operated by rotation of the transverse shaft means 18.
'; A mechanical connection, indicated generally at 20, interconnects the upright shaft means 17 and the transverse shaft means 18 so that the two shaft means ro-tate simultaneously and equally.
` The shaft means 17 and 18 and the mechanical connection 20 are fully described in U.S. patent 4,095,061-so no detailed description is given here.
- The power drive for the circuit disconnect ap-paratus consists of a subassembly, indicated generally at 21, which i~ best seen in Figs. 2 and 3. A base plate 22 ls secured to the housing bottom wall 14 by a pair o hex-headed machine screws 22a which screw into threaded holes in the base plate; and mounted upon the base plate is a terminal block 23; ~otor m~ounting brackets 24; and a bridge frame, indicated generally at 25.
The mdunting brackets 24 support a fractional horsepower A.C. motor 26 which may, for example, be 0.5 h.p.
A motox shaft 27 is provided with a flexible coupling 28; 25 and a threaded shaft 29 has one end connected to the flex-i~le coupliny 28.
The bridge frame 25 consists of an upriqht support block 30 and an upright bearin~ block 31 which are surmounted by parallel rails 32 and 33. An opening in the support block 30 accommodates the Guter end portion of the flexible coupling 28; and the bearing block 31 serves - 114~67 as a mounting for a flanged bearing 34 which rotatably receives a coupling 35 which carries the outer end of the threaded shaft 29 and is a part of an assembly in-cluding the threaded shaft 29 and is a part of an as-sembly including a universal joint 36. The assembly of the coupling 35 and the universal joint 36 also includes a coupling 37 to which the inner end of a power screw 38 is fixedly secured.
As best seen in Figs. 3 and 4, the power drive is operatively connected to the transverse shaft means 18 by a threaded drive nut 39 which is adapted to travel along the power screw 38, and a crank yoke, indicated generally at 40. The crank yoke includes a collar member 41 which is fixedly secured to the shaft 18 and has an off-set crank arm 42, and a yoke arm 43 which includes a mounting portlon 44 and an offset yoke portion, so integral trunnlons 45 on the threaded drive nut 39 may be recelved ln holes ln the offset crank arm 42~and the offset yoke portion 43, and the crank assembly 40 can be dlsconnected from the drlve nut 39 by removing a machine screw 46 by which the offset crank arm and the offset yoke arm are secured together.
From the foregoing descriptlon, it is apparent that the entire power subassembly 21 may be removed from the housing 11 by removing the end closures 16 and 16a, removing the machine screw 46 and disengaging the trunnions 45 from the crank member 40, and removing the machine screws 22a that secure the subassembly to the housing bottom wall 14.
It is also necessary, of course, to disconnect from the ter-~0 minal block 23 an electrical cable 47 which extends through a hole in the housing side wall 12 and has a lower end connected i7 to a control box 48 which is near ground level on the post P. A flanged rubber sealing collar 49 snugly grips the cable 47 and makes a tight sealing fit in the hole in the housing side wall 12.
Mounted upon the bridge frame rail 32 are limit switches 50 and 51 which are seen in Fig. 2 to have respec-tive actuator arm follower rollers 50a and 51a extending into the space above an opening between the rails 32 and 33 where they may be contacted by a threaded traveler 52 which is mounted upon the threaded shaft 29 and has an up-per actuating portion 53 above the horizontal plane of the rails 32 and 33 where it has first and second actuating cam faces 53a and 53b which may contact the limit switch follower rollers 50a and 51a, respectively, as the traveler 52 moves back and forth responsive to rotation of the threaded shaft 29.
In the drawings the traveler 52 is seen to be in contact with the follower roller 51a of the limit switch 51, which is therefore a switch that stops operation of the motor 26 when the disconnect switches are fully closed.
The limit switch 50, therefore, serves to stop operation of the motor 26 when the disconnect switches reach their fully open positions.
In order that the present apparatus may be readily converted from manual to power operation, the lower end of the shaft means 17 has a removable cap 54 (Fiys. 3 and 4) which has holes 55 in its side wall that align wi-th a bore in the lowex end portion of the shaft means 17. W~len the cap 54 is removed a manual operating crank shaft may be operatively connected to the lower end of the shaft means 17 by a pin extending through the bore as taught in my United States patent 4,095,061.
114~967 A safety stop bracket 56 alongside the cap 54 has a hole 57 which is in the same horizontal plane as the holes 55 and the aligned bore of the shaft means 17. The disconnect switches, of course rotate 90 from the enclosed position of Fig. l to a fully open position;
-' so when the switches are open the bore in the shaft 17 and the aligned holes 55 in the cap 54 are also aligned with the hole 57, permitting insertion of a re~aining pin through the bore and through the holes 55 and 57 to mechan-ically lock the disconnect switches in their open positions for the added safety of anybody working on the line.
The control box 48 contains a switch 47a for starting the motor 26; and in case the circuit discon-nect apparatus i5 also intended for control from a central point, as is increasingly the case in major power distribu-tion syste,ms, the control box 48 must also, of course, have a terminal to the central control system with an interlock which permits a person working on the line to disable the cen1ral control hook-up to,elimina'ce the possibility that zo the switch may be closed from the switching center while he is working on the line.
When the power drive has an A.C. motor as here described, it is easily driven either to open or close _~ the disconnect switches by a 110 volt energizing circuit from the power line. On the other hand, where a direct current motor is used the control box must also contain a transformer and storage batteries to furnish a direct curxent source for energizing the motor, which may be as srnall as 0.25 h.p. There is some advantage in direct cur-rent operation in the event of a powe~ failure, because 114~967 -current batteries, which are kept constantly charged, can reliably open and close the switches as much as 25 or 30 times, even if the power is off. However, the A.C. opera-ting system is, of course, simpler and much less expensive.
The foregoing detailed description is given for ~ clearness of understanding only, and no unnecessary limita-tions should be understood therefrom, as modifications will be obvious to those skilled in the art.
. .. .
_, ,
Claims (12)
1. In an electric circuit disconnect apparatus which has a base, a shaft means rotatably mounted on said base, and a disconnect switch blade moved between closed and open positions by rotation of said shaft means, a power drive for rotating said shaft means comprising, in combination:
a power unit which has a reversible rotary shaft;
a crank arm on said shaft means;
a driving connection between said reversible rotary shaft and said crank arm, said driving connection including;
a drive screw rotated by said reversible rotary shaft, a member pivotally connected to the crank arm, said member having a threaded mounting on said drive screw so that it is linearly reciprocated by rotation of the drive screw, and connecting means between said reversible rotary shaft and said drive screw which permits the latter to pivot in the plane of movement of the crank arm so as to compensate for the difference between the linear reciprocation of said pivotally connected member and the arcuate movement of the crank arm;
power control means for starting said power unit;
and additional power control means for automatically stopping said power unit effectively simultaneously with arrival of the switch blade at fully closed position and at fully open position.
a power unit which has a reversible rotary shaft;
a crank arm on said shaft means;
a driving connection between said reversible rotary shaft and said crank arm, said driving connection including;
a drive screw rotated by said reversible rotary shaft, a member pivotally connected to the crank arm, said member having a threaded mounting on said drive screw so that it is linearly reciprocated by rotation of the drive screw, and connecting means between said reversible rotary shaft and said drive screw which permits the latter to pivot in the plane of movement of the crank arm so as to compensate for the difference between the linear reciprocation of said pivotally connected member and the arcuate movement of the crank arm;
power control means for starting said power unit;
and additional power control means for automatically stopping said power unit effectively simultaneously with arrival of the switch blade at fully closed position and at fully open position.
2. The combination of claim 1 in which the connecting means is a universal joint.
3. The combination of claim 1 in which the base is a box-like housing, the axially rotatable shaft means extends through said housing, and the following elements of the combination are enclosed within the housing:
1) the power unit, 2) the crank arm, 3) the driving connection, 4) the additional power control means, in which an electric terminal block is also mounted in the housing for connection between an energizing circuit and the power unit and between said additional power control means and said energizing circuit, and in which the power control means for starting the power unit is in said energizing circuit remote from said housing.
1) the power unit, 2) the crank arm, 3) the driving connection, 4) the additional power control means, in which an electric terminal block is also mounted in the housing for connection between an energizing circuit and the power unit and between said additional power control means and said energizing circuit, and in which the power control means for starting the power unit is in said energizing circuit remote from said housing.
4. The combination of claim 3 in which the housing has two open ends, removable end walls close said open ends, the driving connection has a manually detachable part immediately inside one of said open ends, and a subassembly is removable through the other of said open ends, said subassembly including:
1) the power unit, 2) the driving connection other than said manually detachable part, 3) the additional power control means, 4) the electric terminal block.
1) the power unit, 2) the driving connection other than said manually detachable part, 3) the additional power control means, 4) the electric terminal block.
5. The combination of claim 1 in which the additional power control means includes spaced power control devices, actuating means for said devices, and means for reciprocating said actuating means in timed relationship to the reciprocation of the pivotally connected member.
6. The combination of claim 5 in which the actuating means for the power control devices comprises a threaded traveler, and the means for reciprocating the actuating means comprises a threaded shaft rotated by the reversible rotary shaft and operatively engaging said threaded traveler.
7. In a group operated electrical circuit disconnect apparatus for a plurality of overhead electric power distribution lines carried on poles of a type which includes a base adapted to be mounted adjacent the top of a pole, a first disconnect switch surmounting the base, second and third disconnect switches mounted atopposite sides of the base, an upright shaft means journalled on said base, said upright shaft means being operatively connected to said first switch so that axial rotation of the shaft means opens and closes the first switch, transverse shaft means journalled on said base and operatively connected to said second and third switches so that axial rotation of said transverse shaft means opens and closes said second and third switches, and a mechanical connection between said upright shaft means and said transverse shaft means so that axial rotation of one of said shaft means causes axial rotation of the other of said shaft means, the improvement comprising, in combination:
a power unit which has a reversible rotary shaft;
a crank arm on one of said shaft means;
a driving connection between said reversible rotary shaft and said crank arm, said driving connection including, a drive screw rotated by said reversible rotary shaft, a member pivotally connected to the crank arm, said member having a threaded mounting on said drive screw so that it is linearly reciprocated by rotation of the drive screw, and connecting means between said reversible rotary shaft and said drive screw which permits the latter to pivot in the plane of movement of the crank arm so as to compensate for the difference between the linear reciprocation of said pivotally connected member and the arcuate movement of the crank arm;
power control means for starting said power unit;
and additional power control means for automatically stopping said power unit effectively simultaneously with arrival of the switch blade at fully closed position and at fully open position.
a power unit which has a reversible rotary shaft;
a crank arm on one of said shaft means;
a driving connection between said reversible rotary shaft and said crank arm, said driving connection including, a drive screw rotated by said reversible rotary shaft, a member pivotally connected to the crank arm, said member having a threaded mounting on said drive screw so that it is linearly reciprocated by rotation of the drive screw, and connecting means between said reversible rotary shaft and said drive screw which permits the latter to pivot in the plane of movement of the crank arm so as to compensate for the difference between the linear reciprocation of said pivotally connected member and the arcuate movement of the crank arm;
power control means for starting said power unit;
and additional power control means for automatically stopping said power unit effectively simultaneously with arrival of the switch blade at fully closed position and at fully open position.
8. The combination of claim 7 in which the connecting means is a universal joint.
9. The combination of claim 7 in which the base is a box-like housing, the axially rotatable shaft means extends through said housing, and the following elements of the combination are enclosed within the housing:
1) the power unit, 2) the crank arm, 3) the driving connection, 4) the additional power control means, in which an electric terminal block is also mounted in the housing for connection between an energizing circuit and the power unit and between said additional power control means and said energizing circuit, and in which the power control means for starting the power unit is in said energizing circuit remote from said housing.
1) the power unit, 2) the crank arm, 3) the driving connection, 4) the additional power control means, in which an electric terminal block is also mounted in the housing for connection between an energizing circuit and the power unit and between said additional power control means and said energizing circuit, and in which the power control means for starting the power unit is in said energizing circuit remote from said housing.
10. The combination of claim 9 in which the housing has two open ends, removable end walls close said open ends, the driving connection has a manually detachable part immediately inside one of said open ends, and a subassembly is removable through the other of said open ends, said subassembly including:
1) the power unit, 2) the driving connection other than said manually detachable part, 3) the additional power control means, 4) the electric terminal block.
1) the power unit, 2) the driving connection other than said manually detachable part, 3) the additional power control means, 4) the electric terminal block.
11. The combination of claim 7 in which the additional power control means includes spaced power control devices, actuating means for said devices, and means for reciprocating said actuating means in timed relationship to the reciprocation of the pivotally connected member.
12. The combination of claim 11 in which the actuating means for the power control devices comprises a threaded traveler, and the means for reciprocating (claim 12 cont'd) the actuating means comprises a threaded shaft rotated by the reversible rotary shaft and operatively engaging said threaded traveler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000407496A CA1140969A (en) | 1979-09-10 | 1982-07-16 | Power driven group operated circuit disconnect apparatus for overhead electric power lines |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7412779A | 1979-09-10 | 1979-09-10 | |
| US74,127 | 1979-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140967A true CA1140967A (en) | 1983-02-08 |
Family
ID=22117882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000350033A Expired CA1140967A (en) | 1979-09-10 | 1980-04-16 | Power driven group operated circuit disconnect apparatus for overhead electric power lines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1140967A (en) |
-
1980
- 1980-04-16 CA CA000350033A patent/CA1140967A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4357505A (en) | Power driven group operated circuit disconnect apparatus for overhead electric power line | |
| CN210800582U (en) | Road cleaning monitoring device for environmental sanitation | |
| CN100458997C (en) | Spindle drive for a circuit breaker and/or earthing switch | |
| US4095061A (en) | Group operated circuit disconnect apparatus for overhead electric power lines | |
| CA1140967A (en) | Power driven group operated circuit disconnect apparatus for overhead electric power lines | |
| CN220307570U (en) | Subway illumination control box | |
| CN211670143U (en) | Fracture position indicating device of GIS isolation switch | |
| CA1140969A (en) | Power driven group operated circuit disconnect apparatus for overhead electric power lines | |
| CN112289620B (en) | Three-station isolating switch | |
| NO954510L (en) | Device for transmitting electric current to a drive device | |
| US5804930A (en) | Motor operator for a power line phase switch | |
| CN215758687U (en) | Road gate machine core | |
| CN113232693B (en) | Motor gear box capable of realizing bidirectional hand operation of electric switch machine | |
| CN112420441B (en) | Disassembly-free mechanism assembly device of outdoor vacuum circuit breaker | |
| CN206962280U (en) | A kind of protector on high-voltage complete switch equipment manual knob switch | |
| CN208478895U (en) | Power distribution cabinet | |
| CA2288512A1 (en) | Pivoting mounting block for motorized conveyor pulleys | |
| CN113391107A (en) | Three-phase electric meter with anti-misoperation mechanism and use method thereof | |
| USRE30784E (en) | Group operated circuit disconnect apparatus for overhead electric power lines | |
| KR100311532B1 (en) | Earthing switch device of switchboard | |
| CN108390268A (en) | Switch board | |
| JPH02252878A (en) | Driving device for door body | |
| CN213635771U (en) | Dual supply change over switch fixed knot constructs | |
| CN220244300U (en) | Vacuum container observation mechanism and vacuum processing tank | |
| CN107749359A (en) | A kind of switch gear room's chassis vehicle device of the multiple locking of electromechanics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |