US3886755A - Method for locating an underground cable - Google Patents

Method for locating an underground cable Download PDF

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Publication number
US3886755A
US3886755A US367425A US36742573A US3886755A US 3886755 A US3886755 A US 3886755A US 367425 A US367425 A US 367425A US 36742573 A US36742573 A US 36742573A US 3886755 A US3886755 A US 3886755A
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US
United States
Prior art keywords
tool
cable
power plant
cable laying
pulling
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
US367425A
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English (en)
Inventor
Holger Alexander Lundin
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE7208164A external-priority patent/SE356645C/xx
Priority claimed from SE7302340A external-priority patent/SE361238B/xx
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of US3886755A publication Critical patent/US3886755A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle

Definitions

  • ABSTRACT There is disclosed an assemblage for laying an under- [30] Foreign Application Priority Data ground cable.
  • This assemblage includes a movable but June 21, 1972 Sweden 8164/72 stationarily Operated power p a gg g tool and a Feb. 20, 1972 Sweden .1 23400 72 cable y g tool.
  • the digging tool and the cable laying tool are connected to the power plant so that they can [52] U5. C1. 61/72.6; 37/193; 172/700 be nded from the power plant to a selected dis- [51] Int, Cl, A011 3/64; F161 1/00; A011 13/08 tance and are then pulled back to the power plant.
  • a brake is [56] References Cit d mounted on the cable laying tool and co-acts with the UNITED STATES PATENTS same so as to avoid slack in the cable while the same 1,854,617 4 1932 Maloon 61/726 ls bemg 3,406,525 10/1968 Kinnan 61/726 7 Claims, 8 Drawing Figures Pmwanms mm 11886755 SHEET 1 FATE .TEB 3 SHEET aassflss METHOD FOR LOCATING AN UNDERGROUND CABLE
  • the present invention relates to a method for locating an underground cable, consisting in opening a track in the ground and to place the cable in the opened track and then to refill the track over the cable.
  • Cables should preferably be placed at requested depth without the need of a cable ditch beeing opened and then refilled after that the cable has been drawn out.
  • the intention with the present invention is to provide such method and tools suitable for carrying out the method.
  • FIG. 1 shows the final stage during ploughing a track or a cable trench
  • FIG. 2 shows the starting stage during location of a cable in an earlier ploughed track
  • FIG. 3-6 show different views of a location tool
  • FIG. 7 shows a further embodiment of a location tool from the side and FIG. 8 shows the same tool from above.
  • FIG. 1 is diagramatically shown an excavator (pulling vehicle) 10 with a hinged digging arm 11, in the end of which remote from the excavator a plough tool or a rasp or digger tool 12 is attached, furthermore, a location tool 13 and a piece of cable 14.
  • the digging machine has two supporting legs 15 by means of which the excavator stands steadily on the ground.
  • the figure shows the final phase of a working stage in which a track 16 has been loosened in the ground from the place where the location tool 13 is to the immediate proximity of the machine 10.
  • FIG. 2 the machine 10 and the tool 13 are shown in the same position as in FIG. 1 but the arm 11 has been extended so that it has been possible to stick in rasp 12 into a fastening means 131 on the upper part of the tool 13 on the side turned towards the machine 10.
  • Cable 14 is passed through the tool 13 so that when tool 13 is drawn in the earlier loosened track 16 by the stationary machine 10 the cable 14 will be gradually located in the bottom of thetrack. As the tool 13 is pulled towards the machine 10 the track is refilled behind the tool and the cable 14 is thus located in the requested depth.
  • FIG. 3 shows the tool 13 from the side. It consists of two spaced plane-parallel walls 31 and 32, see also FIG. 4 which shows the tool from behind and FIG. 5 which shows the tool from above. These walls form together a unit similar to a plough in the forward direction and backwards open and downwards closed with a strip 34 placed between the walls 31 and 32 for steadily the unit and steering the passing cable through the tool.
  • FIG. 6 shows a cut through the tool along the line AA in FIG. 3, with the oblique wall 34 for steering the inserted cable.
  • a rasp 12 which in mounted position is bent towards the excavator 10 and has an edge in the same direction it is quite easy to loosen the ground where the cable later will be placed.
  • the shape of the rasp 12 and the mobility and strength of the arm 11 and the fact that the excavator is not moved during the stage of loosening allow that all ground which can be dug also can be rasped.
  • big stones can be broken and heavy roots torn off.
  • the rasp can be brought to carry out a loosening work around the stones and stubs in order to facilitate the finishing of a track with loose substances.
  • Rasp 12 has a shape and thickness which suits to the fastening means 131 on the location tool 13.
  • the distance between sheets 31 and 32 in this tool corresponds to the diameter of the largest cable which is to be located.
  • the cable can gradually be passed between the sheets 31 and 32 and be placed in the same depth in the track in which the bottom of the tool is driven.
  • the location of a given cable length takes places in steps of about two meters. It is of course possible that first loosening of the whole cable length takes place and that the cable thereafter is located in the whole length without interruption. It is of course also possible that the transportation of the rasp 12 respectively location tool 13 takes place by means of a fixed arm or with a connection 11 on the drawing vehicle which during the working stages is moved along the cable length. Whether the one or the other method is choosen depends on the ground conditions. As the rasp can be substituted by a digging bucket there will be no need of an extra machine during specially difficult conditions.
  • 7-8 spaced from each other provide a unit similar to a plough in the forward direction and opened on the backside and having a strip 72 inserted between the walls for staying the tool and steering the cable 14 passing through tool upon location of the cable.
  • a turnable drum holder 74 one end 141 of which supports a rotatable drum 75 arranged for the cable 14 which has to be located and the other end 142 of which is shaped as a guiding means for steering the cable 14 winded from the drum 75 together with the strip 72.
  • end portion 142 is bent in abouth right angle to the other part of the drum holder and directed down in about the same direction as the strip 72, so that the cable 14 easily can be steered by the end portion by the strip 72 at the passage through the tool.
  • the lower part of the end portion 142 has a track, in which the cable 14 runs.
  • the drum holder 74 has two rectangular taps 143 for supporting in the corresponding recesses in walls 70 and 71, and a through shaft 77 for supporting two holders 160.
  • the rectangular taps 142 and the recesses in the walls have been shaped so that the drum holder can move enough in order to obtain braking effect and free sliding respectively against a brake plate 76 which is attached to the holder 160. On the other hand, greater movements are prevented.
  • the holders 160 of the brake plate 76 consist of two arms which are fixed outside of the walls 70 and 71 and seating on the through shaft 77 on which the arms are maintained by a cotter or another suitable arrangement.
  • the height of the brake plate 76 is regulated in proportion to the diameter of the cable drum 75 by means of a shaft 78, which has two lockable eccentrics against the walls and 71.
  • a protective strip of for example plastic is placed over the cable.
  • a roll 79 with plastic band 191 is arranged which is turnable between the two arms which hold the brake plate 76.
  • a strip guide 20 is attached to the walls 70 and 71 and guides the plastic band 191 from the roll 79 over the free part of the cable 14 outside the tool.
  • a method of laying an underground cable comprising the steps of:
  • a digging assembly including a movable but stationarily operating power plant, a digging tool. a cable laying tool and a pulling mechanism coupled at one end to the power plant and extendable to a selected distance. the extended end of the mechanism being attachable to either tool;
  • said assemblage comprising in combination:
  • a movable but staiffily operated power plant including a pulling means extendable from a position adjacent to the power plant to a selected extended position, said pulling means being retractable from the extended position to the adjacent position by activation of the power plant;
  • a digging tool for loosening ground said tool being attachable to the extended end of the pulling means for pulling the tool from the extended position to the adjacent position to effect loosening of the ground along the path through which the tool is pulled back;
  • a cable laying tool attachable to said extended end of the pulling means for pulling said tool from the extended position to the adjacent position, said cable laying tool including a space closed off by a ploughshaped wall at the side facing the power plant when the cable laying tool is attached to the pulling means and being open at the side opposite to said plough-shaped wall.
  • said plough-shaped wall displacing loosened ground as the cable laying tool is pulled back towards the power plant. thereby providing a ditch for laying cable fed into the space in the tool and fed out from the cable laying tool through the open side thereof as said tool is being pulled back to the power plant;
  • a cable drum for winding thereabout a length of cable to be fed into said space
  • said holder means supported by the cable laying tool, said holder means including a pivotal two-arm lever, the fulcrum of the lever being mounted on the cable laying tool. one arm of said lever mounting said drum;
  • brake means also mounted on the cable laying tool, said brake means including a bar pivotally mounted on said cable laying tool, and a brake member mounted on said bar and disposed below said drum, said brake means being movable into and out of braking engagement with said cable drum in response to pulling of the cable laying tool towards the power plant;
  • said holder means being located and balanced so that the drum and the brake means are biased by the gravitational force acting upon the drum into braking engagement when the cable laying tool is at a standstill but are pivoted out of said braking engagement by the pull of the cable against said other lever arm overcoming the gravitational force when the cable laying tool is pulled towards the powers plant.
  • said cable laying tool comprises two spaced apart parallel walls, a base wall, and said plough-shaped side wall adjacent to the base wall, said walls defining said space within the cable laying tool, and guide means for guiding cable fed into the space from the side thereof opposite to the base wall and out of said space through the open side thereof.
  • An assemblage for laying an underground cable comprising in combination:
  • a movable but stationarily operated power plant including a pulling means extendable from a position adjacent to the power plant to a selected extended position, said pulling means being retractable from the extended position to the adjacent position by activation of the power plant;
  • a digging tool for loosening ground said tool being attachable to the extended end of the pulling means for pulling the tool from the extended position to the adjacent position to effect loosening of the ground along the path through which the tool is pulled back:
  • a cable laying tool attachable to said extended end of the pulling means for pulling said tool from the extended position to the adjacent position
  • said cable laying tool including two spaced apart parallel walls, a base wall, and a plough-shaped side wall adjacent to the base wall, said walls defining a closed space within the cable laying tool, said plough-shaped wall facing the power plant when the cable laying tool is attached to the pulling means and said space being open at the side opposite to said plough-shaped wall, said plough-shaped wall displacing loosened ground as the cable laying tool is pulled back towards the power plant, thereby providing a ditch for laying cable fed into the space in the tool and fed out from the cable laying tool through the open side thereof as said tool is being pulled back to the power plant;
  • guide means for guiding cable fed into said space from the side thereof opposite to the base wall and out of said space through the open side thereof;
  • a cable drum for winding thereabout a length of cable to be fed into said space
  • said holder means supported by the cable laying tool, said holder means including a pivotal two-arm lever, the fulcrum of said lever being mounted on the cable laying tool, one arm of the lever mounting said drum;
  • brake means also mounted on the cable laying tool and disposed below said drum, said brake means including a bar pivotally mounted on said cable laying tool, and a brake member mounted on said bar, said brake means being movable into and out of braking engagement with said cable drum in response to pulling of the cable laying tool towards the power plant, the other arm of said lever guiding the cable, said drum and said holder means being located and balanced so that the drum and the brake means are biased by the gravitational force acting upon the drum into braking engagement when the cable laying tool is at a standstill but are pivoted out of said braking engagement by the pull of the cable against said other lever arm overcoming the gravitational force when the cable laying tool is pulled towards the power plants.

Landscapes

  • Electric Cable Installation (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
US367425A 1972-06-21 1973-06-06 Method for locating an underground cable Expired - Lifetime US3886755A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7208164A SE356645C (sv) 1972-06-21 1972-06-21 Forfaringssett for forleggning av jordkabel
SE7302340A SE361238B (enrdf_load_stackoverflow) 1973-02-20 1973-02-20

Publications (1)

Publication Number Publication Date
US3886755A true US3886755A (en) 1975-06-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US367425A Expired - Lifetime US3886755A (en) 1972-06-21 1973-06-06 Method for locating an underground cable

Country Status (10)

Country Link
US (1) US3886755A (enrdf_load_stackoverflow)
JP (1) JPS4957387A (enrdf_load_stackoverflow)
AR (1) AR202896A1 (enrdf_load_stackoverflow)
AU (1) AU5613273A (enrdf_load_stackoverflow)
CA (1) CA978379A (enrdf_load_stackoverflow)
CH (1) CH558602A (enrdf_load_stackoverflow)
DE (1) DE2329521A1 (enrdf_load_stackoverflow)
ES (1) ES416108A1 (enrdf_load_stackoverflow)
FR (1) FR2189904B1 (enrdf_load_stackoverflow)
GB (1) GB1432256A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9280898B1 (en) 2014-01-03 2016-03-08 Tony Richmond Object detection assembly
US11035098B2 (en) * 2019-01-29 2021-06-15 Timothy Eldred Kilmer Low disturbance tile installation plow and system thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8906916U1 (de) * 1989-06-06 1989-07-27 Georg Föckersperger GmbH, 8521 Aurachtal Einrichtung zum Ziehen eines sogenannten Kabelpfluges

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1854617A (en) * 1930-08-27 1932-04-19 American Tractor Equipment Com Cable laying machine
US3406525A (en) * 1965-06-28 1968-10-22 Henkels & Mccoy Inc Machine for laying cable
US3497016A (en) * 1967-04-17 1970-02-24 Francis B Ryan Saw action cutting edge for blades and rippers
US3726099A (en) * 1970-08-19 1973-04-10 Hoes K Fa Apparatus for digging ditches
US3747357A (en) * 1972-03-20 1973-07-24 R Erickson Vehicle for underground installation of flexible utility lines and the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1854617A (en) * 1930-08-27 1932-04-19 American Tractor Equipment Com Cable laying machine
US3406525A (en) * 1965-06-28 1968-10-22 Henkels & Mccoy Inc Machine for laying cable
US3497016A (en) * 1967-04-17 1970-02-24 Francis B Ryan Saw action cutting edge for blades and rippers
US3726099A (en) * 1970-08-19 1973-04-10 Hoes K Fa Apparatus for digging ditches
US3747357A (en) * 1972-03-20 1973-07-24 R Erickson Vehicle for underground installation of flexible utility lines and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9280898B1 (en) 2014-01-03 2016-03-08 Tony Richmond Object detection assembly
US11035098B2 (en) * 2019-01-29 2021-06-15 Timothy Eldred Kilmer Low disturbance tile installation plow and system thereof
US11473265B2 (en) * 2019-01-29 2022-10-18 Timothy Eldred Kilmer Low disturbance tile installation plow and system thereof

Also Published As

Publication number Publication date
JPS4957387A (enrdf_load_stackoverflow) 1974-06-04
AU5613273A (en) 1974-11-28
GB1432256A (en) 1976-04-14
CH558602A (de) 1975-01-31
FR2189904A1 (enrdf_load_stackoverflow) 1974-01-25
FR2189904B1 (enrdf_load_stackoverflow) 1977-02-11
CA978379A (en) 1975-11-25
DE2329521A1 (de) 1974-01-17
AR202896A1 (es) 1975-07-31
ES416108A1 (es) 1976-02-16

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