CA1140969A - 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
- CA1140969A CA1140969A CA000407496A CA407496A CA1140969A CA 1140969 A CA1140969 A CA 1140969A CA 000407496 A CA000407496 A CA 000407496A CA 407496 A CA407496 A CA 407496A CA 1140969 A CA1140969 A CA 1140969A
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- CA
- Canada
- Prior art keywords
- shaft
- housing
- power unit
- combination
- universal joint
- 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
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- 230000002441 reversible effect Effects 0.000 claims 2
- 241001288024 Lagascea mollis Species 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 description 2
- 241001481828 Glyptocephalus cynoglossus Species 0.000 description 1
- 208000003251 Pruritus Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
114~69 - POWER DRIVEN GROUP OPERATED CIRCUIT DISCONNECT
APPARATUS FOR OVERHEAD ELECTRIC PO~R LIMES
BACKGROUMD OF THE INVENTION
This application is a divisional of Canadian Serial 5No. 350,033, filed April 16, 1980.
Overhead electric power distribution lines require circuit disconnect means at certain locations; and since such distribution lines commonly operate in a three-phase system, there are three associated lines which ordinarily must be disconnected and reconnected simultaneously. 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 disconnec-t appa~atus of my U.S.
patent 4,095,061.
There are power operated oil break units for remote switching of electric power transmission lines. The purpose of such units is generally to isolzte a fault such as a short circuit. They are dangerc)us for a person wGrking on the lines because the switch~s are concealed from view so there is no visual indication o whetl-ler they are open or clos~d.
In general, prior art po~er clriven circuit dis-connect apparatus which can be controlled either from the ground or from a remote central terminal has been mecllanically very complex and has also been expensive.
114~969 SUM~,RY OF THE INVE~TION
The invention to which this divisional application is directed per~ains to an electric circuit disconnect apparatus of a type which includes a box-like housing having opposite ends which are open with a removable closure for each of the open ends. An axially rotatable shaft means is journalled on and extends through the housing and a disconnect switch blade is moved between closed and open positions by rotation of the shaft means. The improvement includes a subassembly in the housing which is removable through one of the open ends, the subassembly having a power unit, a first part of a driving connection between the power unit and the shaft means for axially rotating the shaft means from the power unit to selectively open or close the disconnect switch blade and power control me~ns for automatically stopping the power unit effectively simultaneously with arrival of the disconnect switch blade at fully closed position and at fully open position An electric terminal block is provided for connection between an energizing circuit and the power control means, a second part of the driving connection being immediately adjacent the other of the open ends and manually detachable from the first part, a power unit start switch in the energizing circuit remote from the housing.
114~969 THE D~WINGS
Fig. l is a side elevational view of a power driven group operated circuit disconnect apparatus em-bodyinc3 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 view 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 of Fig. 2 with parts omitted for clarity.
DETAILED DESCRIPTION OF THE INVE~ITION
Re~erring to the drawings in detail, and re~erriny first to Fig. l, a pole, indicated gencrally at P, has an upper end U to which a mounting bracket a is attached; and bolted to the upper end of the bracket 8 is ]~ an angle bracke-t 9 to which is securcd the circuit dis-connect apparatus of the present invcntion, which is in-dicated generally at 10.
The apparatus 10 includes a base, indicated generally at 11, which consists of a box-]i};e housinc3 havirlc-~
~5 side walls 12 and 13, a bottorn wall 1~ and a top wall 15.
The base 11 has rcmovable closures 16 and 16a at its cnds.
Extending through the base 11 is an upric3htshaft means, indicated gcncrally at 17, and transversc shaft means, indicatcd gcnerally at 18. ~ first disconn~ct switch, indicatcd gcnerally at l9a, surrnounts thc base ll and is operated by rotation of the upright shaft means 17i while a second disconnect switch l9b is mounted upon the base side wall 12, and a third di~connect switch (not shown) is mountcd on the sidewall 13. Both of said last named disconnect s~itches are operated by rotation of the transverse shaft means 18.
A mechanical connection, i~dicated generally at 20, interconnects thc 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 mechanicalconnection 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 gencrally at21, which is best seen in Figs. 2 and 3. A base plate 22 is secured to the housing bottom wall 14 by a pair of h~x-headed machine screws 22a which ~crew into threaded holes in the base plate, and mounted upon the base plate is a terminal block 23; ~otor mounting brackets 24; and a bridge frame, indicat.ed generally at 25.
The mounting brackets 24 support a fractional horsepower A.C. motor 26 which may, fo~ example, be 0.5 h.p.
A rnotor shat 27 is provided with a flexible coupling 28;
and a threaded shaft 29 has one end connected to the flex-lc couplincJ 28.
The bridgc frame 25 consists of an upright support block 30 ~nd an uprigllt bcaring block 31 ~hich ~rc surmountPd by parallel rails 32 and 33. ~n opcning in thc support bloc]~ 30 accommodatcs the Gutcr end portion of the flexible coupling 28; ~nd the bearing bloc}; 31 serves ~1409f~9 as a mounting for A flanged bearing 34 which rotat~bl.y receives a coupling 35 which carries the outer end of the thre~ded shaft 29 and is a part of an assembly in-cluding the threaded shaft 29 and is a part of an as-S sembly including a universal joint 36. The assembly ofthe coupling 35 and the universal joint 36 also includ~s a coupling 37 to which the inner end of a power screw 38 is fixedly secured.
As best seen in Figs. 3 and q, 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 scrcw 38, and a crank yoke, indicated gènerally at 40. The crank yoke includes a collar member 41 which is fixedly secured to the shaft 18 and has an off-~5 set crank arrn 42, and a yoke arm 43 which includes a mount.ing portion 44 and an offset yoke portion, so integral trunnions 45 on the threaded drive nut 39 may be received in holes in the offset crank arm 42 and the offset yoke porti.on 43, and the cran~. assembly 40 can be disconnected from the drive nut 39 by removing a machine screw 46 b~
which the offset cl:arlk arm anc. the offset yoke arm are -ec-~red tGqether .
From the foregoing description, it is a~p.arcnt that the entlre power subassembly 21 may be removed from the housing 11 by removing the end closures 1~ ancl 16a, removing the machine scrcw 46 and discngaging the trunnions ~.5 from the crank member 40, and removing the m~chine scre-vs 22a that secure the subassembly to the housin~ bottom wal] 14.
It is also necessary, of course, to disconnect from the ter-~o minal block 23 an electric~l cable 47 ~hich extends througrl a hole in the hcusing side wall 12 and has a lower ~nd conncct~d ~6-)969 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 sealinc3 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 ~ig. 2 to havc respec-tive actuator arm follower rollers 50a and 51a extending into the space above an opening between the rail.s 32 ancl 33 where they may be contacted by a thrca~ed 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 respective].y, as the travcler ~; 52 move.s ~ack and forth rcsponsive to rotation of the thr~aded sha~t 29.
In the drawings the travelcr 52 is scen to bc in contact with the ollower roller 51a of the lirnit .;witch 51, which is therefore a switch that ~tops operation of th( ~o motor 26 when the disconnect switches are fully closed.
Thc limit s~7itch 50 therefore, servcs to stop operation of the motor 26 whcn thc disconnect s-.~itchcs reach their fully open pO5 iti.onC-~, In or~er that thc preC-ent apparatu; rlcly be readily
APPARATUS FOR OVERHEAD ELECTRIC PO~R LIMES
BACKGROUMD OF THE INVENTION
This application is a divisional of Canadian Serial 5No. 350,033, filed April 16, 1980.
Overhead electric power distribution lines require circuit disconnect means at certain locations; and since such distribution lines commonly operate in a three-phase system, there are three associated lines which ordinarily must be disconnected and reconnected simultaneously. 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 disconnec-t appa~atus of my U.S.
patent 4,095,061.
There are power operated oil break units for remote switching of electric power transmission lines. The purpose of such units is generally to isolzte a fault such as a short circuit. They are dangerc)us for a person wGrking on the lines because the switch~s are concealed from view so there is no visual indication o whetl-ler they are open or clos~d.
In general, prior art po~er clriven circuit dis-connect apparatus which can be controlled either from the ground or from a remote central terminal has been mecllanically very complex and has also been expensive.
114~969 SUM~,RY OF THE INVE~TION
The invention to which this divisional application is directed per~ains to an electric circuit disconnect apparatus of a type which includes a box-like housing having opposite ends which are open with a removable closure for each of the open ends. An axially rotatable shaft means is journalled on and extends through the housing and a disconnect switch blade is moved between closed and open positions by rotation of the shaft means. The improvement includes a subassembly in the housing which is removable through one of the open ends, the subassembly having a power unit, a first part of a driving connection between the power unit and the shaft means for axially rotating the shaft means from the power unit to selectively open or close the disconnect switch blade and power control me~ns for automatically stopping the power unit effectively simultaneously with arrival of the disconnect switch blade at fully closed position and at fully open position An electric terminal block is provided for connection between an energizing circuit and the power control means, a second part of the driving connection being immediately adjacent the other of the open ends and manually detachable from the first part, a power unit start switch in the energizing circuit remote from the housing.
114~969 THE D~WINGS
Fig. l is a side elevational view of a power driven group operated circuit disconnect apparatus em-bodyinc3 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 view 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 of Fig. 2 with parts omitted for clarity.
DETAILED DESCRIPTION OF THE INVE~ITION
Re~erring to the drawings in detail, and re~erriny first to Fig. l, a pole, indicated gencrally at P, has an upper end U to which a mounting bracket a is attached; and bolted to the upper end of the bracket 8 is ]~ an angle bracke-t 9 to which is securcd the circuit dis-connect apparatus of the present invcntion, which is in-dicated generally at 10.
The apparatus 10 includes a base, indicated generally at 11, which consists of a box-]i};e housinc3 havirlc-~
~5 side walls 12 and 13, a bottorn wall 1~ and a top wall 15.
The base 11 has rcmovable closures 16 and 16a at its cnds.
Extending through the base 11 is an upric3htshaft means, indicated gcncrally at 17, and transversc shaft means, indicatcd gcnerally at 18. ~ first disconn~ct switch, indicatcd gcnerally at l9a, surrnounts thc base ll and is operated by rotation of the upright shaft means 17i while a second disconnect switch l9b is mounted upon the base side wall 12, and a third di~connect switch (not shown) is mountcd on the sidewall 13. Both of said last named disconnect s~itches are operated by rotation of the transverse shaft means 18.
A mechanical connection, i~dicated generally at 20, interconnects thc 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 mechanicalconnection 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 gencrally at21, which is best seen in Figs. 2 and 3. A base plate 22 is secured to the housing bottom wall 14 by a pair of h~x-headed machine screws 22a which ~crew into threaded holes in the base plate, and mounted upon the base plate is a terminal block 23; ~otor mounting brackets 24; and a bridge frame, indicat.ed generally at 25.
The mounting brackets 24 support a fractional horsepower A.C. motor 26 which may, fo~ example, be 0.5 h.p.
A rnotor shat 27 is provided with a flexible coupling 28;
and a threaded shaft 29 has one end connected to the flex-lc couplincJ 28.
The bridgc frame 25 consists of an upright support block 30 ~nd an uprigllt bcaring block 31 ~hich ~rc surmountPd by parallel rails 32 and 33. ~n opcning in thc support bloc]~ 30 accommodatcs the Gutcr end portion of the flexible coupling 28; ~nd the bearing bloc}; 31 serves ~1409f~9 as a mounting for A flanged bearing 34 which rotat~bl.y receives a coupling 35 which carries the outer end of the thre~ded shaft 29 and is a part of an assembly in-cluding the threaded shaft 29 and is a part of an as-S sembly including a universal joint 36. The assembly ofthe coupling 35 and the universal joint 36 also includ~s a coupling 37 to which the inner end of a power screw 38 is fixedly secured.
As best seen in Figs. 3 and q, 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 scrcw 38, and a crank yoke, indicated gènerally at 40. The crank yoke includes a collar member 41 which is fixedly secured to the shaft 18 and has an off-~5 set crank arrn 42, and a yoke arm 43 which includes a mount.ing portion 44 and an offset yoke portion, so integral trunnions 45 on the threaded drive nut 39 may be received in holes in the offset crank arm 42 and the offset yoke porti.on 43, and the cran~. assembly 40 can be disconnected from the drive nut 39 by removing a machine screw 46 b~
which the offset cl:arlk arm anc. the offset yoke arm are -ec-~red tGqether .
From the foregoing description, it is a~p.arcnt that the entlre power subassembly 21 may be removed from the housing 11 by removing the end closures 1~ ancl 16a, removing the machine scrcw 46 and discngaging the trunnions ~.5 from the crank member 40, and removing the m~chine scre-vs 22a that secure the subassembly to the housin~ bottom wal] 14.
It is also necessary, of course, to disconnect from the ter-~o minal block 23 an electric~l cable 47 ~hich extends througrl a hole in the hcusing side wall 12 and has a lower ~nd conncct~d ~6-)969 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 sealinc3 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 ~ig. 2 to havc respec-tive actuator arm follower rollers 50a and 51a extending into the space above an opening between the rail.s 32 ancl 33 where they may be contacted by a thrca~ed 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 respective].y, as the travcler ~; 52 move.s ~ack and forth rcsponsive to rotation of the thr~aded sha~t 29.
In the drawings the travelcr 52 is scen to bc in contact with the ollower roller 51a of the lirnit .;witch 51, which is therefore a switch that ~tops operation of th( ~o motor 26 when the disconnect switches are fully closed.
Thc limit s~7itch 50 therefore, servcs to stop operation of the motor 26 whcn thc disconnect s-.~itchcs reach their fully open pO5 iti.onC-~, In or~er that thc preC-ent apparatu; rlcly be readily
2 ccnverted rom mantr11 to po-.~er o~eration thc lower crltl of :
thc~ aft means 17 has a removable cap S~ (lig;. 3 ancl 4) ~hich has holes 5r~ in its side wal] that align ~ith a b~rc in the lower- cnd portion of thc shaLt mcanC. 17. ~htn the cap 54 is rcmoved a manual operating cran~. shaft may be opcLati~ely connected to the lower cn(l o~ t}le shaft m^all;
17 by a pin extending through the borc as taught in my United States patent 4 095,061.
114~3169 A safety stop brack~t 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. 1 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 retaining pin through the bore and through the holes 55 and 57 to mechan-ically lock the disconnect switches in their open positionsfor 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 is also intended for control from a central point, as is increasingly the casc in major power distribu-tion systems, the control ~ox 48 must also, of course, have a terminal to the central control system with an interlock which pe~nits a person working on the line to disable the cen~ral control hook-up to eliminate the possihility that the switch may be closed from the switching center while he is working on the line.
When the power drive has an ~.C. motor as here described, it is easily driven either to open or clcse the disconnect switches by ~ 110 volt ener~izirlcJ circuit fro~ the power linc. On thc other hand, ~here a direct current motor is used the control box must also contain a transformer and storage batteries to furnish a dircct current source for ener~izin~ the motor, which may be as sJnall as 0.25 Il.p. There is some advan~age in direct cur-rent operation in the event of a pcwe~ failure, becaust?
14~ 69 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 ~.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 rnodifications will be obvious to those s]cilled in the art.
_g_
thc~ aft means 17 has a removable cap S~ (lig;. 3 ancl 4) ~hich has holes 5r~ in its side wal] that align ~ith a b~rc in the lower- cnd portion of thc shaLt mcanC. 17. ~htn the cap 54 is rcmoved a manual operating cran~. shaft may be opcLati~ely connected to the lower cn(l o~ t}le shaft m^all;
17 by a pin extending through the borc as taught in my United States patent 4 095,061.
114~3169 A safety stop brack~t 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. 1 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 retaining pin through the bore and through the holes 55 and 57 to mechan-ically lock the disconnect switches in their open positionsfor 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 is also intended for control from a central point, as is increasingly the casc in major power distribu-tion systems, the control ~ox 48 must also, of course, have a terminal to the central control system with an interlock which pe~nits a person working on the line to disable the cen~ral control hook-up to eliminate the possihility that the switch may be closed from the switching center while he is working on the line.
When the power drive has an ~.C. motor as here described, it is easily driven either to open or clcse the disconnect switches by ~ 110 volt ener~izirlcJ circuit fro~ the power linc. On thc other hand, ~here a direct current motor is used the control box must also contain a transformer and storage batteries to furnish a dircct current source for ener~izin~ the motor, which may be as sJnall as 0.25 Il.p. There is some advan~age in direct cur-rent operation in the event of a pcwe~ failure, becaust?
14~ 69 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 ~.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 rnodifications will be obvious to those s]cilled in the art.
_g_
Claims (16)
1. In an electric circuit disconnect apparatus of a type which includes a box-like housing having opposite ends which are open, a removable closure for each of said open ends, an axially rotatable shaft means journalled on and extending through said housing, and a disconnect switch blade moved between closed and open positions by rotation of said shaft means, the improvement comprising, in combination:
a subassembly in the housing which is removable through one of said open ends, said subassembly including:
1) a power unit, 2) a first part of a driving connection between said power unit and said shaft means for axially rotating said shaft means from said power unit to selectively open or close said disconnect switch blade, 3) power control means for automatically stopping the power unit effectively simultaneously with arrival of the disconnect switch blade at fully closed position and at fully open position, 4) an electric terminal block for connection between an energizing circuit and said power control means;
a second part of said driving connection which is immediately adjacent the other of said open ends and manually detachable from said first part;
and a power unit start switch in said energizing circuit remote from said housing.
a subassembly in the housing which is removable through one of said open ends, said subassembly including:
1) a power unit, 2) a first part of a driving connection between said power unit and said shaft means for axially rotating said shaft means from said power unit to selectively open or close said disconnect switch blade, 3) power control means for automatically stopping the power unit effectively simultaneously with arrival of the disconnect switch blade at fully closed position and at fully open position, 4) an electric terminal block for connection between an energizing circuit and said power control means;
a second part of said driving connection which is immediately adjacent the other of said open ends and manually detachable from said first part;
and a power unit start switch in said energizing circuit remote from said housing.
2. The combination of claim 1 which includes a crank arm on said shaft means which has an outer end that moves arcuately with axial rotation of the shaft means, the manually detachable second part of the driving connection includes one element pivotally connected adjacent said outer end of said crank arm, a second element, means manually detachably connecting said first element to said second element, and an operative connection between said second element and the power unit.
3. The combination of claim 2 in which the first element is fixedly pivotally connected to the crank arm, the operative connection between the second element and the power unit imparts linear reciprocation to said second element, and there is means remote from the crank arm to accommodate said linear reciprocation and said arcuate movement of the crank arm.
4. The combination of claim 3 in which the power unit is a reversible electric motor having a rotatable shaft.
5. The combination of claim 4 in which the first part of the driving connection comprises a universal joint which provides said means remote from the crank arm, means fixedly connecting said universal joint to the motor shaft, a drive screw fixedly connected to said universal joint, and a drive nut on said screw which is said second element of said manually detachable second part of the driving connection.
6. The combination of claim 5 in which The means fixedly connecting the universal joint to the motor shaft includes a threaded shaft, the power control means comprises first and second normally closed limit switches mounted immediately adjacent said threaded shaft, and a threaded traveler carried on said threaded shaft actuates said limit switches.
7. The combination of claim 4 in which the first part of the driving connection comprises a drive screw operatively connected to the shaft of the electric motor, and there is a drive nut on said screw which is said second element of said manually detachable second part of the driving connection.
8. The combination of claim 7 in which said means to accommodate comprises a universal joint, means fixedly connecting the universal joint to the motor shaft, and means fixedly securing one end of the drive screw to the universal joint, the other end of the drive screw being supported only by the drive nut and the means detachably connecting the drive nut to the first element.
9. In a group operated electric circuit disconnect apparatus for a plurality of overhead electric power distribution lines carried on poles of a type which includes a box-like housing adapted to be mounted adjacent the top of a pole, said housing having opposite ends which are open, a removable closure for each of said open ends, a first disconnect switch surmounting the housing, second and third disconnect switches mounted at opposite sides of the housing, an upright shaft means journalled on and extending through said housing, said upright shaft means being operatively connected to said first switch so that the axial rotation of the upright shaft means opens and closes the first switch, transverse shaft means journalled on and extending through said housing, said transverse shaft means being 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 within said housing 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 subassembly in the housing which is removable through one of said open ends, said subassembly including:
1) a power unit, 2) a first part of a driving connection between said power unit and one of said shaft means for axially rotating said one of said shaft means from said power unit to selectively open or close the three disconnect switches, 3) power control means for automatically stopping the power unit simultaneously with arrival of the disconnect switches at fully closed position and at fully open position;
4) an electric terminal block for connection between an energizing circuit and said power control means;
a second part of said driving connection which is immediately adjacent the other of said open ends and manually detachable from said first part;
and a power unit start switch in said energizing circuit remote from said housing.
a subassembly in the housing which is removable through one of said open ends, said subassembly including:
1) a power unit, 2) a first part of a driving connection between said power unit and one of said shaft means for axially rotating said one of said shaft means from said power unit to selectively open or close the three disconnect switches, 3) power control means for automatically stopping the power unit simultaneously with arrival of the disconnect switches at fully closed position and at fully open position;
4) an electric terminal block for connection between an energizing circuit and said power control means;
a second part of said driving connection which is immediately adjacent the other of said open ends and manually detachable from said first part;
and a power unit start switch in said energizing circuit remote from said housing.
10. The combination of claim 9 which includes a crank arm on said one of said shaft means which has an outer end that moves arcuately with axial rotation of the shaft means, the manually detachable second part of the driving connection includes one element pivotally connected adjacent said outer end of said crank arm, a second element, means manually detachably connecting said first element to said second element, and an operative connection between said second element and the power unit.
11. The combination of claim 10 in which the first element is fixedly pivotally connected to the crank arm, the operative connection between the second element and the power unit imparts linear reciprocation to said second element, and there is means remote from the crank arm to accommodate said linear reciprocation and said acuate movement of the crank arm.
12. The combinationn of claim 11 in which the power unit is a reversible electric motor having a rotatable shaft.
13. The combination of claim 12 in which the first part of the driving connection comprises a universal joint which provides said means remote from the crank arm, means fixedly connecting said universal joint to the motor shaft, a drive screw fixedly connected to said universal joint, and a drive nut on said screw which is said second element of said manually detachable second part of the driving connection.
14. The combination of claim 13 in which the means fixedly connecting the universal joint to the motor shaft includes a threaded shaft, the power control means comprises first and second normally closed limit switches mounted immediately adjacent said threaded shaft, and a threaded traveler carried on said threaded shaft actuates said limit switches.
15. The combination of claim 12 in which the first part of the driving connection comprises a drive screw operatively connected to the shaft of the electric motor, and there is a drive nut on said screw which is said second element of said manually detachable second part of the driving connection.
16. The combination of claim 15 in which said means to accommodate comprises a universal joint, means fixedly connecting the universal joint to the motor shaft, and means fixedly securing one end of the drive screw to the universal joint, the other end of the drive screw being supported only by the drive nut and the means detachably connecting the drive nut to the first element.
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 (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7412779A | 1979-09-10 | 1979-09-10 | |
| US74,127 | 1979-09-10 | ||
| CA000350033A CA1140967A (en) | 1979-09-10 | 1980-04-16 | Power driven group operated circuit disconnect apparatus for overhead electric power lines |
| CA000407496A CA1140969A (en) | 1979-09-10 | 1982-07-16 | Power driven group operated circuit disconnect apparatus for overhead electric power lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140969A true CA1140969A (en) | 1983-02-08 |
Family
ID=27166647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000407496A Expired CA1140969A (en) | 1979-09-10 | 1982-07-16 | Power driven group operated circuit disconnect apparatus for overhead electric power lines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1140969A (en) |
-
1982
- 1982-07-16 CA CA000407496A patent/CA1140969A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |