The present application generally relates to guy wires for utility poles. More particularly, the present application relates to an anchor point locating device for determining the anchor point of a guy wire for supporting a utility pole, particularly on a curved section of transmission pole line. The device may be used for assisting utility transmission line personnel in locating the anchor point without angle measure or bisection calculation.
A utility pole is a column or post for supporting overhead power lines and various other public utilities and related equipment. These poles are typically spaced along a tract, with sections of wire in different forms depending on their use, including sections which generally have straight sections of the line, and sections which generally have curved sections of the line.
Poles on the curved section are generally subjected to different forces than are those on a straight section. Their conductors (due to deviation from a straight run) exert a force tending to pull the poles inward toward the centre of the curve of that section of line. This force must be countered by a guy cable anchored on the outside of the curve. Ideally, this location is exactly, or very close to, 180 degrees from the bisector of the angle formed by two adjacent poles before and after the middle pole whose guy anchor point is to be located.
Existing methods of calculating this location include using a protractor or the like, which measures the included angle formed by the three poles. A technician would then bisect that angle and extend the bisector back 180 degrees, toward the outside of the line curve where the guy is anchored, thus countering the tendency for the pole to be pulled toward the curve centre. This can be a difficult and awkward method, as it requires several personnel to determine the angle, to bisect it and, most importantly, to try to accurately sight in to the needed guy anchor point location, such as shown in U.S. Pat. No. 2,330,414 to Elwert. Other techniques determine the length of the “pull” inward (see U.S. Pat. No. 1,640,435 to Armstrong), which may be of little interest when determining the position of a proper anchor point. Other devices require attachment to a utility pole for determining the required angles, which is not helpful with more modern metallic-based poles. These are often difficult to work with and particularly unsuitable in uneven terrain or difficult environmental conditions, such as in the winter where snow can ice can be treacherous to the technicians in the field. Further, some existing computer systems are expensive and complicated to work with. Thus, there has long existed a need to more easily and accurately determine the bearing toward the position of a guy wire anchor point, particularly on a curved section of a transmission line.
This background information is provided for making information available believed by the applicant to be of possible relevance to the present application. No admission is necessarily intended, nor should be construed, that any of the preceding information constitutes prior art against the subject matter presented herein.
An aspect of the present application is to provide a device and method for determining a location for positioning a guy wire anchor for supporting a utility pole.
In accordance with one aspect, there is provided a utility pole guy wire anchor point locating device comprising a plurality of arms, such as three arms, and a focused light source, such as a laser, to determine the bearings for locating the position for optimal placement of a guy wire anchor for supporting a utility pole on a curve between two or more adjacent utility poles. The laser is used to project light away from the device onto a surface outside a curved section of a utility pole transmission line between a first utility pole (typically on the left) and a second utility pole (typically on the right). The device is positioned at a location between the first and second utility poles to be sighted, at or near a utility pole (e.g. a “middle” pole) or surveyor's mark on the curved transmission line between the two utility poles to be sighted. In one embodiment, the light from the laser projects onto a surface to indicate the correct bearing. In one embodiment, the light may be a vertical line (either alone or as a component of a cross-hair laser beam) from the device which, when viewed against a backdrop vertical surface or against the ground directly, intersects with the ground. The light from the laser provides bearings which is used to identify an optimal direction to facilitate the location for positioning the guy wire anchor in the surrounding terrain. A method of using said device for determining a guy wire anchor location point is also provided.
Advantageously, the present measuring device and method allow for a one-person operation, whereby a technician can set up the device adjacent to, on, or in the surveyed location of a centre pole of a 3-pole section of the curved line. Thus, the need for a second technician may be eliminated, as the device itself provides the determined bearing for positioning the guy wire anchor. In one embodiment, a technician may simply set up the device at or near the middle utility pole or location in question, sight each of the first utility pole (such as a left hand pole, LH) using a first arm of the device, then a second utility pole (such as a right hand pole, RH) using a second arm of the device, set the third arm of the device on the scale number on the device, activate the laser and walk to a location at a pre-determined distance from the device. The location can be sighted using the vertical component of the laser light either directly on the ground, or by holding up any flat vertical surface (non-limiting examples include a sheet of cardboard or other flat material, including the technician's own torso) in the path of the final position of the laser beam which comprises a vertical laser beam component that intersects with a point on the ground. In either scenario, this provides directional bearings to identify a point on the ground where the anchor point is thus determined.
adjacent to the utility pole to be guyed.
Provided herein is a utility pole guy wire anchor point locating device and method of use thereof. In one embodiment, the device comprises a plurality of “arms”, typically two or more arms, more typically three arms. The arms are used as directional aids for sighting towards two utility poles to be sighted, each on either side (“left” and “right”) of a location on a curved section of a utility pole transmission line (such as at or near a middle utility pole generally between the two utility poles to be sighted), and for directional bearing locating using a focused light source (such as a laser), for determining an optimal location for placement of the guy cable/wire anchor on the outside of the utility pole transmission line curve. As used herein, a “middle pole” or “middle utility pole” is located generally equidistant between the first (left hand) and second (right hand) utility poles to be sighted on the curved section of the utility pole transmission line connecting the three (left, middle, right) utility poles.
In one embodiment, the device is used for determining the location for placement of the guy anchor using three poles in a transmission line, where the middle pole (i.e., a pole on a curved section) is to be anchored by the guy wire attached to the guy anchor. The middle pole may or may not yet have been placed; if not, its intended position may be established with a surveyor's mark or a temporary pole. The guy wire is typically used for supporting the middle pole which may be subjected to excessive strain from the weight of the transmission wires to be supported. Typically, on a long, curved utility pole transmission line, there may be several poles (though not necessarily all) requiring a guy wire support. Where and whether a guy is required is usually determined by an engineer or field technical personnel on a case by case basis, often depending on making allowances for adjacent property access, fence lines, trees and any number of possible obstacles outside the line curve.
To gain a better understanding of the device described herein, the following examples are set forth. These examples are for illustrative purposes only, and they should not limit the scope of the present application in any way.
An embodiment of the present measuring device 1 is shown generally in
The measuring disc 12 comprises two or more scales or headings, typically two scales. In one embodiment shown in
Arm P2 comprises a scale reader window 20. This window is positioned at or near an end of the pointer body 26 opposite the opposing end 25 and inset 24. The scale reader window 20 permits a user to read the scale therethrough (typically the first scale 14) when arm P2 is sighted on right adjacent pole 200 and arm P1 already sighted on pole 100 (described in greater detail below). This permits the user to obtain directional bearings, without the need to record or calculate any measurements, to mark the guy anchor point, after arm G3 is set as described below.
Ideally, guy arm G3 is designed to permit rotatable attachment with arms P1 and P2; this may be achieved by lining up opening 18c with a corresponding opening through measuring disc centre hole 18a on arm P1 and centre hole 18b on arm P2, and providing a fixing means, such as with a retainer nut and bolt (see nut 40 in
In
The device is typically set up on a supporting member, a non-limiting example being a tripod, such as a standard camera tripod or the like. The tripod is set up at the position of interest, which can be in close proximity to the middle utility pole, or at a surveyor's mark where the utility pole is intended to be erected (or at a location in immediate proximity thereto). Preferably, the tripod should allow for ready attachment of the device thereto for convenient set-up and disassembly, preferably by hand with few or no tools required.
In one embodiment shown in
The light from the laser source typically has a vertical component, either alone or as part of a cross-hair pattern. The laser can be projected such that the vertical laser light component intersects with the ground, such that the technician can see the bearing of the guy arm away from the device on the ground. When using a vertical laser or cross-hair having a vertical component, a beam of light from that light source should intersect with the ground directly (thus forming a generally horizontal line of the laser light along the surface of the ground in the direction away from the laser source) and/or intersect with a vertical surface in the directional bearings determined by the device. In any suitable way, a vertical beam of light thus intersects with the ground using the observed bearings from the device. Thus, the use of a vertical surface is ideal but may not be necessarily required when the beam of laser light projecting from the device can already be readily visualized on the ground away from the device.
The distance from the device for placement of the guy anchor can be pre-determined, such as specified in a line engineering instruction or in consideration of other factors, such as the local terrain or any obstacles in the immediate area. The device, however, provides the bearing in the ideal direction from the device for assisting the technician, regardless of the pre-determined distance.
Sightings are taken on the two adjacent left and right poles (such as shown in
Next, while keeping arms P1 and P2 in place, the user rotates guy arm G3 such that the number on the second scale 16, as viewed through window 30, matches the number identified above that was seen through window 20, to obtain the observed bearing. For example, if the number 3 on the first scale is visualized through the window 20, the user would then rotate guy arm G3 such that the number 3 on second scale 16 is visible through window 30. The user then turns on the laser source 36, thus projecting a laser light away from the device (i.e., in a direction outside the curved section) to a surface. The “surface”, in this context, can be either the actual ground in the vicinity of the device, or can be a vertical surface onto which the laser light is projected; in either case, the laser light can be used to determine the bearing from the device in the direction of the proposed guy anchor location as described below, such that the laser or, more typically a vertical component thereof, intersects with the ground.
At a pre-determined distance 90 away from the surveyor's mark or middle pole in the direction shown in
In another embodiment, the technician may set up a target surface (such as shown in
Thus, the device projects laser light in the desired directional bearing based on the sightings from arms P1 and P2 and coordinated with arm G3; indeed, while the distance 90 from the light source where the guy anchor is to be positioned may be pre-determined, the actual location for placement of the guy anchor location 80 is the sighted directional position at that pre-determined distance. The guy wire can then be placed on the guy anchor outside the arc and attached to the pole requiring tension support.
In summary, the device and method of use provide a major simplification of the utility line technician's job in the field. The steps include:
Ideally, the present device (with tripod) may be left assembled for storage and/or transit, such as by collapsing tripod legs and minimizing protrusion of P1, P2, G3 arms. Ideally, the assembly/disassembly can be done manually, preferably with no tools required.
The following are exemplary embodiments.
Embodiment 1. A utility pole guy wire anchor point locating device comprising:
Embodiment 2. The device of Embodiment 1, wherein the first utility pole is a left hand (LH) utility pole, and the second utility pole is a right hand (RH) utility pole, relative to the position of the device on the generally curved section of the utility pole transmission line.
Embodiment 3. The device of Embodiment 1 or 2, wherein the light source is a focused light source, such as a laser or the like.
Embodiment 4. The device of Embodiment 3, where the laser light from the light source comprises a vertical laser light component, such as a cross-hair having a vertical component, such that the vertical laser light component can intersect with the ground when the vertical component of the light source is projected on a surface, such as on a vertical surface or on the ground.
Embodiment 5: The device of Embodiment 3, wherein the surface is the ground and the vertical laser light component intersects with the ground, and wherein the anchor point is determined where the vertical laser light intersects with the ground at a pre-determined distance away from the device or from a middle pole which the device is placed on or adjacent to, outside the generally curved section of the utility pole transmission line, the middle pole being generally located between the first and second utility poles on the generally curved section.
Embodiment 6: The device of Embodiment 4, wherein the vertical surface is a panel, board, paper or human torso, for example.
Embodiment 7: A method of determining an anchor point for a utility pole guy wire anchor using the device of any of Embodiments 1 to 6, the method comprising:
Embodiment 8: The method of Embodiment 7, wherein the light source is a laser, and the light is a laser light.
Embodiment 9: The method of Embodiment 8, wherein the surface is the ground and the laser projects a vertical light which intersects with the ground, and wherein the anchor point is determined where the vertical laser light intersects with the ground at a pre-determined distance from the device outside the generally curved section of the utility pole transmission line; said pre-determined location may be specified in a line engineering instruction.
Embodiment 10: The method of any of Embodiments 7 to 9, wherein the light source projects a vertical light (or vertical light component of a cross-hair laser) towards a generally flat vertical surface such that the vertical light intersects with the ground outside the generally curved section of the utility pole transmission line, allowing a user to identify a location on the ground, thus determining the point for placement of the guy wire anchor.
The above disclosure and figures are intended to be illustrative and not exhaustive. The description will suggest many variations and alternatives to one of ordinary skill in the art. Those familiar with the art may recognize other equivalents to the specific embodiments described herein within, without departing from the spirit and scope thereof.
The present application claims priority to U.S. Provisional patent application 63/462,715, filed Apr. 28, 2023, the contents of which are hereby incorporated by reference in their entirety.
Number | Date | Country | |
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63462715 | Apr 2023 | US |