[0001] The present invention relates to a bracket for power transmission poles,
and particularly, a bracket with enhanced loadbearing capacity for power
transmission poles and a method for fabricating a bracket with enhanced
loadbearing capacity for power transmission poles having a base plate and a
5 plurality of loadbearing plates coupled to the base plate wherein the loadbearing
plates have enhanced loadbearing capacity on account of improvement in the
coupling between the loadbearing plates and the base plate.
BACKGROUND OF THE INVETNION
[0002] Brackets are mounted on the power transmission poles to provide support
10 to electrical components such as electrical cables, connectors and transformers
etc. In the existing brackets for power transmission poles, the loadbearing plates
of flats bars are merely welded to the power transmission poles or another plate of
the bracket which is mounted on the power transmission poles. On account of
which the loadbearing capacity of the bracket is considerably low and therefore, in
15 case of heavy winds or rains, the loadbearing plates or flat bars get detached from
the poles or plate of the bracket causing accidents or damage to the equipment and
interruption in power supply.
[0003] There has been a long felt need for a bracket with enhanced loadbearing
capacity for use in power transmission poles.
20 [0004] Therefore, one of the main objects of the present invention is to increase
the loadbearing capacity of the bracket for power transmission poles.
[0005] Another object of the present invention is to provide improved coupling
between the loadbearing plates and the base plate in a more secured manner.
[0006] Another object of the present invention is to provide bracket that can
25 withstand heavy winds and rains.
3
[0007] Another object of the present invention is to improve the fitment of the
base plate with the power transmission pole.
[0008] Any reference herein to known prior art does not, unless the contrary
5 indication appears, constitute an admission that such prior art is commonly known
by those skilled in the art to which the invention relates, at the priority date of this
application.
SUMMARY OF THE PRESENT INVENTION
[0009] The present invention discloses a novel construction of a bracket with
10 enhanced loadbearing capacity for power transmission poles wherein protrusions
or notches extending from loadbearing plates are inserted in horizontal and
parallel slots made in the base plate, and protrusions or notches are bent behind
the base plate. After bending of the protrusions or notches, the joint is welded
throughout on both sides improving the strength of the joint, and thus the
15 loadbearing capacity of the bracket is considerably enhanced.
[0010] Further, the present invention provides an oval shaped slot at the middle of
the base plate to provide better fitment of the bracket with the power transmission
poles.
[0011] The present invention also discloses a method of fabricating a bracket with
20 enhanced loadbearing capacity for power transmission pole. The method
comprising steps of fabricating a base plate, loadbearing plates, forming
protrusions or notches in the loadbearing plates, forming slots or apertures in the
base plate for receiving protrusions or notches, inserting the protrusions or
notches extending from the said loadbearing plates through said slots or apertures
25 in said base plate, bending the inserted portion of said protrusions or notches on
the reverse side of the base plate making L-bends, welding of the inserted and
4
bent protrusions or notches of loadbearing plates throughout on the front and the
reverse of the base plate to secure the said loadbearing plates to said base plate.
[0012] Other aspects, advantages of certain embodiments, and salient features of
the invention will become apparent to those skilled in the art from the following
5 detailed description, which, taken in conjunction with the annexed drawings,
discloses exemplary embodiments of the invention.
BRIEF DESCRIPTION OF ACCOMPAYING DRAWINGS
[0013] The various aspects, features, and advantages of the present invention will
be more apparent from the following description taken in conjunction with the
10 accompanying drawings, in which:
[0014] FIG. 1 illustrates a bracket for the power transmission poles according to
the present invention.
[0015] FIG. 2 is a reverse perspective view of the bracket for the power
transmission poles of the present invention of FIG. 1.
15 [0016] FIG. 3 illustrates a view of section of the bracket for the power
transmission poles of the present invention.
[0017] FIG. 4 is a rear view of FIG. 3.
[0018] FIG. 5 illustrates an enlarged view of section of a loadbearing plate
showing a protrusion or notch extending from the loadbearing plate.
20 DETAILED DESCRIPTION OF THE PRESENT INVENTION
[0019] The embodiments herein and the various features and advantageous details
thereof are explained more fully with reference to the non-limiting embodiments
that are illustrated in the accompanying drawings and detailed in the following
description. Descriptions of well-known components and processing techniques
25 are omitted to not unnecessarily obscure the embodiments herein. The examples
used herein are intended merely to facilitate an understanding of ways in which
5
the embodiments herein can be practiced and to further enable those skilled in the
art to practice the embodiments herein. Accordingly, the examples should not be
construed as limiting the scope of the embodiments herein.
[0020] The present invention discloses a bracket with enhanced loadbearing
5 capacity for power transmission poles having a metal base plate and a plurality of
metal loadbearing plates coupled to the base plate wherein a protruded portion of
the side of each of the loadbearing plates is inserted into slots shaped openings
made in the base plate and the inserted portion is bent behind the base plate. The
joint is welded from both sides of the base plate improving the strength of the
10 joint, and thus the loadbearing capacity of the bracket is significantly enhanced. In
the present invention, a boat shaped upright base plate having a plurality of
horizontal and parallel slots to which a portions protruding from the horizontal
and parallel loadbearing plates are inserted and bent on the reverse side of the
base plate and are further secured by welding on the front and rear of the base
15 plate.
[0021] In the present invention, a bracket (1) with enhanced loadbearing capacity
for power transmission pole has been developed. The constructional element of
the bracket comprises of a base plate (11) secured to the power transmission pole
by securing means in the vertical direction and a plurality of loadbearing plates
20 (12, 13) are joined at right angle to the base plate (11). The plurality of
loadbearing plates (12, 13) are oriented horizontally and spaced apart vertically
from each other. Each of the loadbearing plate consists of a protrusion or notch
(52) extending from longer edge of the loadbearing plate. The base plate (11) has
plurality of slots or apertures for receiving protrusion or notch (52) extending
25 from the loadbearing plate (11). The protrusion fit into the slots of the base plate
(11) and after insertion protrusion portion is bent to form L-bends (34, 35). The
protrusion or notch after insertion into the slots or aperture of the base plate (11)
forms L-bends (34, 35) on the reverse side of the base plate (11). After formation
of L-bends on the reverse side of base plate, the provisional positive connection is
30 made between the base plate and the loadbearing plates. Subsequently, the
6
loadbearing plate is coupled to the base plate by welding the slot portion, on the
front and reverse side of the base plate (11), and L-bends (34, 35) portion on the
reverse side of the base plate (11). The material used for the for manufacture of
the base plate, loadbearing plates and other parts of the bracket is steel of grade
5 ASTM A 36 Grade 50.
[0022] A preferred embodiment of the present invention is described in FIG. 1.
FIG. 1 is a view of a bracket (1) as it is joined with a power transmission pole.
The Figure 1 shows a base plate (11) which is affixed/secured to the power
10 transmission pole through two slots (14, 15) and an oval shaped slot (16) in the
middle by suitable securing mechanism such as nut and bolt mechanism. Two
loadbearing plates, upper plate (12) and lower plate (13), are coupled to the base
plate (11). This coupling is done by fabricating a protrusion or notch in both the
loadbearing plates (12, 13) and inserting said protrusions or notches through two
15 horizontal and parallel slots/apertures in the base plate (11) and bending the
inserted portion of said protrusion or notch of loadbearing plates (12, 13) behind
the base plate (11) making L-bends. After formation of L-bends on the reverse
side of base plate, the provisional positive connection is made between the base
plate and the loadbearing plates. Subsequently, the inserted and bent protrusions
20 or notches of loadbearing plates (12, 13) are secured by welding throughout on
both sides namely the front and the reverse sides of the base plate. The bending of
protrusions or notches of loadbearing plates (12, 13) behind the base plate (11)
and welding it throughout on both sides namely the front and rear of the base plate
provides necessary tensile strength to the loadbearing plates. The loadbearing
25 plates are used for placing electrical components. A supporting member (19)
provides support to the lower loadbearing plate (13) and the supporting member
(19) is welded to the base plate (11) and on the lower side of lower loadbearing
plate (13). The main purpose to supporting member (19) is to provide support to
lower loadbearing plate where the heavier components used for power
30 transmission are placed. The welding on the front side (17, 18) of the protrusions
7
or notches of the loadbearing plates (12, 13) in the slots/apertures of the base
plates is depicted in the Figure 1.
[0023] In the conventional brackets for power transmission poles, the loadbearing
plates are merely welded to the power transmission poles or the base plate of the
5 bracket which is mounted on the power transmission poles. In the conventional
brackets, there are no slots in the base plate and straight flat bar are simply welded
to the base plate. There is no extra part/protrusion which can be inserted into slots
and welded on both sides to provide additional strength to the loadbearing plates
or bars. This results in low loadbearing capacity of brackets available in the prior
10 art.
[0024] FIG. 2 is a reverse perspective view of the bracket for power transmission
pole of the present invention of FIG. 1 showing welding on both sides of
protrusions or notches extending from the loadbearing plates through
slots/apertures in the base plate and bent on the reverse side of the base plate. In
15 the bracket (1), protrusions or notches from upper loadbearing plate (22) and
lower loadbearing plate (23) after insertion into the base plate (21) are bent behind
the base plate (21) in the form of L-bends. After formation of L-bends on the
reverse side of base plate, the provisional positive connection is made between the
base plate and the loadbearing plates. Subsequently, the inserted and bent
20 protrusions or notches of loadbearing plates (22, 23) are secured by welding
throughout on both sides namely the front and rear of the base plate. The welding
on the back side (24, 25) of the protrusions or notches of the loadbearing plates
(22, 23) in the slots of the base plates and of the L-bends is depicted in the Figure
2.
25 [0025] FIG. 3 illustrates a view of section of the bracket for power transmission
pole of the present invention showing bending of two protrusions or notches
extending from the two loadbearing plates through two slots in the base plate. In
the bracket (1), two protrusions or notches (34, 35) of loadbearing plates (32.33)
are inserted into slots in the base plate (31) and after insertion, protrusion or
8
notches are bent behind the base plate (31) forming L-bends (34, 35) as shown in
the Figure 3. The protrusion fit into the slots of the base plate (31) and after
insertion protrusion portion is bent to form L-bends (34, 35). The protrusion or
notch after insertion into the slots or aperture of the base plate (31) forms L-bends
5 (34, 35) on the reverse side of the base plate (11). The upper plate protrusion is
bent downward to form L-bend (34) whereas the lower plate protrusion is bent
upward to form L-bend (35). The formation of L-bends on the reverse side of base
plate provides the provisional positive connection between the base plate and the
loadbearing plates.
10 [0026] FIG. 4 is a reverse view of FIG. 3 showing welding on both sides of
protrusions or notches extending from the loadbearing plates through slots into the
base plate and bent on the reverse side of the base plate. In the bracket (1),
protrusions or notches from upper loadbearing plate (42) and lower loadbearing
plate(43) after insertion into the base plate (41) are bent behind the base plate (41)
15 in the form of L-bends. The inserted and bent protrusions or notches of
loadbearing plates (42, 43) are secured by welding (44, 45) throughout on both
sides namely the front and the reverse of the base plate (41). Further, the present
invention provides an oval shaped slot/aperture (46) at the middle of the base plate
(41). The slot is made oval shaped instead of round shaped for the reason it
20 provides a better adjustment/fitment of the bracket (1) with the power
transmission poles.
[0027] FIG. 5 illustrates an enlarged view of section of a loadbearing plate (51)
showing a protrusion or notch (52) extending from the loadbearing plate (51). The
protrusion or notch (52) is inserted into a slot/aperture of the base plate and the
25 protrusion or notch portion (52) is bent behind the base plate of the bracket and
welded throughout on the front side and the reverse side of the base plate.
[0028] The inventor of the present invention has also developed a method of
fabricating a bracket with enhanced loadbearing capacity for power transmission
pole. According to the invention, the method comprises steps of fabricating a base
9
plate. The base plated is fabricated having a flat surface in the middle and curved
surfaces on either side of the flat surface. Further, loadbearing plates are
fabricated in a rectangular shape. In each of the loadbearing plates, a rectangular
shaped protrusion or notch is formed, wherein said protrusion or notch extends
5 from the longer edge of said loadbearing plate. In the base plate, a plurality of
horizontal and parallel equally spaced rectangular slots or apertures are formed on
the flat surface of the said base plate for receiving protrusion or notch extending
from the said loadbearing plates. The loadbearing plates are oriented
perpendicular to the base plate. The protrusion or notch extending from the longer
10 edge of the each of the said loadbearing plates is inserted through said slot or
aperture in the flat surface of said base plate. After insertion of the protrusion or
notch, the inserted portion of said protrusion or notch of said loadbearing plates is
bent on the reverse side of the base plate making L-bends. After making L-bends
of inserted protrusion or notch, welding is done of the inserted and bent
15 protrusions or notches of loadbearing plates throughout on the front and reverse of
the base plate to secure the said loadbearing plates to said base plate. A supporting
member is welded to the base plate and on the lower side of lower loadbearing
plate. Finally, the bracket is secured to the power transmission pole through two
slots at two ends of said base plate and an oval shaped slot in the middle of said
20 base plate by nut and bolt mechanism in the vertical direction.
[0029] The improved coupling between the loadbearing plates and the base plate
provides higher tensile strength to the loadbearing plates as compared to the
conventional bracket. The loadbearing capacity of the bracket of the present
invention has been measured as approximately 210920 N and the loadbearing
25 capacity of the previously known bracket is approximately 138400 N, which
represents an increase of about 50 percent in the loadbearing capacity of the
present invention over the known prior art. On account of higher loadbearing
capacity of the bracket of the present invention, the loadbearing plates remain
intact with base plate of the bracket during heavy winds or rains, thus, avoiding
30 accidents or damage to the equipment and interruption in power supply.
10
[0030] The foregoing description of the present invention will so fully reveal the
general nature of the embodiments/aspects herein that others can, by applying
current knowledge, readily modify and/or adapt for various applications such
specific embodiments without departing from the generic concept, and, therefore,
5 such adaptations and modifications should and are intended to be comprehended
within the meaning and range of equivalents of the disclosed embodiments. It is to
be understood that the phraseology or terminology employed herein is for the
purpose of description and not of limitation.

WE CLAIM

1. A bracket (1) with enhanced loadbearing capacity for the power transmission
pole, said bracket (1) comprising:
a base plate (11) secured to the power transmission pole by securing means in the
10 vertical direction;
a plurality of loadbearing plates (12, 13) coupled at right angle to the base plate
(11), wherein plurality of loadbearing plates (12, 13) are oriented horizontally and
spaced apart vertically from each other;
15
wherein each of said loadbearing plate consists of a protrusion (52) extending
from longer edge of the loadbearing plate;
wherein said base plate (11) has plurality of slots for receiving protrusion (52)
20 extending from the loadbearing plate (11);
wherein protrusion fit into the slots of the base plate (11) and after insertion forms
L-bends (34, 35) on the reverse side of the base plate (11) to form provisional
positive connection between the base plate (11) and the loadbearing plates (12,
25 13);
wherein the loadbearing plate is coupled to the base plate by welding the slot
portion on the front and reverse side of the base plate (11), and L-bends (34, 35)
portion on the reverse side of the base plate (11).
30
12
2. The bracket for the power transmission pole as claimed in claim 1, wherein the
base plate (11) is secured to the power transmission pole through two slots (14,
15) and an oval shaped slot (16) in the middle by nut and bolt mechanism.
5 3. The bracket for the power transmission pole as claimed in claim 1, wherein the
base plate (11) is a flat surface in the middle to which the loadbearing plates (12,
13) are coupled and is curved on either side of the flat surface.
4. The bracket for the power transmission pole as claimed in claim 1, wherein the
10 loadbearing plates (12, 13) are rectangular in shape and are coupled to the flat
surface of the base plate (11) along the longer edge of the loadbearing plate
through protrusions (52) extending from the loadbearing plates into slots in the
flat surface of the base plate (11).
15 5. The bracket for the power transmission pole as claimed in claim 1, wherein slots
in the base plate to receive protrusion from the loadbearing plate are horizontal
and parallel and are equally spaced in the vertical direction.
6. The bracket for the power transmission pole as claimed in claim 1, wherein the
20 length of the protrusion is equal to the flat surface of the base plate (11).
7. The bracket for the power transmission pole as claimed in claim 1, wherein the
bracket comprises two loadbearing plates (12, 13), upper plate (12) and lower
plate (13), coupled to the base plate (11).
25
8. The bracket for the power transmission pole as claimed in claim 7, wherein a
supporting member (19) is welded to the base plate (11) and on the lower side of
lower loadbearing plate (13).
13
9. A method of fabricating a bracket (1) as claimed in claims 1 to 8, the method
comprising:
fabricating a base plate (11), wherein said base plate consists of a flat surface in
5 the middle and curved surface on either side of the flat surface;
fabricating plurality of loadbearing plates (12, 13), wherein said loadbearing
plates (12, 13) are rectangular in shape;
10 forming a protrusion or notch (52) in each of said loadbearing plates (12, 13),
wherein said protrusion extends from the longer edge of said loadbearing plate;
forming plurality of horizontal and parallel equally spaced slots on the flat surface
of the said base plate (11) for receiving protrusions (52) extending from the said
15 loadbearing plates (12, 13);
orienting plurality of loadbearing plates (12, 13) at right angle to the base plate
(11);
20 inserting said protrusions (52) extending from the longer edge of the each of the
said loadbearing plates through said slots in the flat surface of said base plate (11);
bending the inserted portion of said protrusions of said loadbearing plates (12, 13)
on the reverse side of the base plate (11) making L-bends (34, 35) to form
25 provisional positive connection between the base plate (11) and loadbearing plate
(12, 13);
welding the inserted and bent protrusions of said loadbearing plates (12, 13)
throughout on the front and reverse of the base plate (11) to secure the said
30 loadbearing plates (12, 13) to said base plate (11);
14
securing said bracket (1) to the power transmission pole through two slots (14, 15)
at two ends of said base plate (11) and an oval shaped slot (16) in the middle of
said base plate(11) by nut and bolt mechanism in the vertical direction.
5 10. The method as claimed in claim 9, further comprising welding a supporting
member (19) to the base plate (11) and on the lower side of lower loadbearing
plate (13).