CLIAMS:We Claim:
1. A high mast mounted multi-light system comprising

a hollow pole of sufficient length for supporting lighting units near the top and having a bottom adapted for grouting and vertically erecting the pole;

an annular carriage ring co-axially and movably mounted at top of said pole for supporting said lighting units comprising plurality of lights/lamps units fitted with connecting power cable, said carriage ring adapted to be moved up or down involving system of pulleys with a cooperative sling rope;

said system of pulleys inbuilt with respect to the hollow pole for sliding up or down the carriage ring alongwith said lights/lamps units fitted thereon to facilitate bringing down the light /lamp units to the ground level for maintenance and lifting it back after maintenance to its original position free of any ladder or trolley; and

an electrical feeder unit for housing electrical control gear units of said light/lamp units spaced apart from said high mast pole and said carriage ring supporting said light/lamp units at ground level to avoid damage of luminaries and/or control gears due to lightening such that when surge voltage and current or lightening current flow directly to the ground through shortest path of earthing strip without flowing through its gear unit and protect the gear unit.

2. A high mast mounted multi-light system as claimed in claim 1 wherein the length of the power cable between the lighting light/lamp units and the electrical feeder unit housing said gear unit is more than the height of the mast pole or lightening current flow path in the pole and preferably at least half the length of cable to supply power from gear unit to light/lamp units.

3. A high mast mounted multi-light system as claimed in anyone of claims 1 or 2 comprising movable annular carriage ring arrangement comprising guide plate for providing support and guidance of carriage ring movement from top to bottom and vice versa involving cooperative longitudinally displaceable sling rope , a locking means for locking said carriage ring in lifted stable disposition, said locking ring and sling further cooperatively connected to a Poly propylene rope with pulley means such that for lowering the carriage ring the sling rope is unlocked from said locking means and allowed to move up by release of the loosening rope involving said puller means.
4. A high mast mounted multi-light system, as claimed in anyone of claims 1 to 3 comprising

said hollow pole of selected length having a bottom plate for grouting and vertically erecting the pole;

said annular carriage ring co-axially and slidably mounted at top of said pole on which a plurality of lights/lamps are fitted with connecting power cable, said carriage ring adapted to be moved up or down connected through pulley with the attached sling rope;

said system of pulleys inbuilt in the hollow pole for sliding up or down the carriage ring alongwith the lights fitted thereon to facilitate bringing down the light filament units to the ground level for maintenance and take it back after maintenance to its original position without the use of any ladder or trolley; and

said electrical feeder pillar for the electrical control gear units of light fittings mounted in a cabinet placed at selective distance besides the high mast pole at ground level to avoid damage of luminaries and/or control gears due to lightening.

5. A high mast mounted multi-light system as claimed in anyone of claims 1 to 4 wherein pulleys are fixed at the top and bottom portion of the inside hollow portion of pole to facilitate the carriage ring to lift up and down through the attached sling rope.

6. A high mast mounted multi-light system as claimed in anyone of claims 1 to 5 wherein to cover the pulleys at top of the pole, one closed plate is attached to top to avoid rain water entering the pole and affecting the mechanism.

7. A high mast mounted multi-light system as claimed in anyone of claims 1 to 6 comprises guide plate and rope guide pulleys for providing support and guidance of sling rope of the carriage ring and cable movement and keep the light fitting at desired height.

8. A high mast mounted multi-light system as claimed in anyone of claims 1 to 7 wherein cable guide bush is placed in the middle of the pole to separate sling rope and cable to prevent twisting with each other during up and down operation of light fitting fixed with carriage ring.

9. A high mast mounted multi-light system as claimed in anyone of claims 1 to 8 wherein a locking ring is used to rest on a locking bolt and keep the carriage ring at the top of pole during normal condition.

10. A high mast mounted multi-light system as claimed in anyone of claims 1 to 9 wherein rope guide pulley is used to support and guidance of the rope during sliding down and bringing up the carriage ring on the top of the pole for maintenance and operation respectively.

11. A high mast mounted multi-light system as claimed in anyone of claims 1 to 10 wherein the feeder pillar is fixed beside the high mast pole to accommodate electrical control gear unit to distribute power to its equipment and provide short circuit protection and also to keep the cable in desire lengths for operation and maintenance.
12. A high mast mounted multi-light system as claimed in anyone of claims 1 to 11 wherein the movement of carriage ring is restricted by providing stopper at the bottom of pole to take care of safety measure during mal-operation and bellow said stopper, holders are fixed to rest the carriage ring for maintenance.
13. A high mast mounted multi-light system as claimed in anyone of claims 1 to 12 wherein said loosening rope comprise a poly propylene rope (pp rope) tied up safely with said locking ring before unlocking the locking ring from locking bolt.

14. A high mast mounted multi-light system as claimed in anyone of claims 1 to 13 wherein an earthing is connected to the pole to take care of short circuit and human safety.

15. A high mast mounted multi-light system as claimed in anyone of claims 1 to 14 wherein light fitting can be brought down to ground level with radial displacement of sling rope.

Dated this the 8th day of May, 2015

Anjan Sen
Of Anjan Sen & Associates
(Applicants Agent)

,TagSPECI:FIELD OF THE INVENTION
The present invention relates to a durable high mast lighting system. More particularly, the present invention is directed to provide a high mast mounted Multi-Light system which can reached to desired height and brought back to ground level for maintenance without any ladder or trolley. Importantly, in this novel way of lighting by separating the light filament and its electrical control gear unit at a distance more than double of pole earthing strip length which eliminates the surge voltage/lightening surge current thus increases the life of the luminaries more than double ensuring longer safe operation. The carriage ring on which the light fittings are mounted can be moved to the top most level of the light poles and fitted with pulley and sling rope attachment. Light fittings which are fixed at a height of 11mts can be brought to ground level (without detaching) for maintenance purposes without the use of any external equipment like ladder or trolley favouring saving of manpower and reducing maintenance cost while ensuring longer and reliable service life of luminaries.

BACKGROUND OF THE INVENTION

Traditionally, the high mast poles were made of hollow poles and a carriage ring was fixed at the top most level of the light pole & the light fittings and gear boxes were mounted on it, which made the carriage ring heavier and exposed to atmosphere. During the rainy season the luminaries are directly exposed to lightening which damaged the lighting system and resulted in frequent break down and requirement of maintenance. This led to manpower wastage and increased maintenance costs.

In the conventional pole mounted lighting system, light fittings and electrical control gear units are kept at the top of the pole and lighting current will pass through the gear unit and damage it frequently. In the conventional system the height of the high mast pole is 21mts. Due to that it becomes very easy for discharging lightening voltage through pole. This is the main cause for damaging the gear units at the top resulting failure in the lighting system which requires frequent maintenance, causes wastage of man, material, money & time. In the conventional system we need to maintain the high mast system at an interval of 15days for replacing gear unit (electrical).

The traditional high mast pole is mechanical gear operated for lifting up and down the light fittings. All the luminaries are fixed at the top of the pole. Due to this the operation and maintenance of these light fitting suffer from following limitations and disadvantages:

1) Lightening damaged the light fitting and its equipment / accessories leading to frequent maintenance.
2) Mechanical Gear is attached with the system so its maintenance required frequently and its failure led to a problem of bringing down the carriage ring.
3) If sling rope comes out of pulley then it become tedious and time consuming to bring down carriage to ground level (which occurs frequently).
4) If carriage is stuck at the top of the pole than, it need fire service hydraulic ladder to bring the carriage in to service which is unsafe and tedious.
5) Due to excess use of pole height excess luminaries are required to cove 360° lighting surrounding the pole.
6) Due to excess use of luminaries and height, pole cost is increased to Rs.1,88,400/- more.
7) Due to excess use of luminaries it increased the cost of maintenance in the system.
8) Due to huge height of pole it require heavy grouting, which is costly.
9) Due to huge height of pole carriage ring take lot of time to
traveling during maintenance.
10) Failure of high mast lighting lead to road traffic accident.
11) Man power & time required for maintenance is high because of frequent failure of luminaries.
12) In view of time consumed in attending to complaint of one pole, jobs on the other poles were getting delayed, resulting in increase in numbers of complaints.
13)Since inception of the high mast pole, till date no development has taken place regarding frequent failure of luminaries and reduction of maintenance cost.

There has been thus a need in the related field of pole lighting system to provide an improved high mast lighting system to ensure easy mounting of lighting on movable ring with optimum height of pole/mast which can be moved up and down in a reliable manner much quicker taking less time of maintenance with less manpower while also ensure longer life of the lamps/lights reducing overall cost of installation and maintenance of such high mast lighting poles. In the new system proposed by this invention, the electrical gear unit need not be checked until the filament is burnt off.

OBJECTS OF THE INVENTION

The basic object of the present invention is directed to provide a durable high mast mounted multi-light system to overcome the problems of installation, operation and maintenance of such lighting system in conventional arrangement for street or area lighting structure.

A further object of the present invention is directed to provide a durable high mast mounted multi-light system wherein pole height is of optimum height for desired illumination having a movable carriage ring with lamp fitting fixed at the top of the pole, which can be brought down to ground level for maintenance by means of operating sling and pulley to enable faster maintenance to be done at ground level so that no trolley or ladder will be required for maintenance work.

A still further object of the present invention is directed to provide a durable high mast mounted multi-light system which would ensure that after the maintenance work is completed, the carriage ring can be raised back to the normal height in a safe and reliable manner with less manpower.

Yet another object of the present invention is directed to provide a durable high mast mounted multi-light system which would ensure that total time duration for maintenance is lower than the conventional one, hence more numbers of such poles can be attended during a given time period substantially reducing overall cast of operation and maintenance.

A still further object of the present invention is directed to provide a durable high mast mounted multi-light system which would ensure avoiding frequent failure of luminaries and reduction of related maintenance cost.

A still further object of the present invention is directed to provide a durable high mast mounted multi-light system wherein pole height is selected requiring less luminaries to cove 360° lighting surrounding the pole.

A still further object of the present invention is directed to provide a durable high mast mounted multi-light system wherein electrical control gears are selectively located at ground level at larger distance from light fittings compared to length of earthing conductor to avoid damage of lighting system due to lightening.

SUMMARY OF THE INVENTION

The basic aspect of the present invention is directed to a high mast mounted multi-light system comprising of

a hollow pole of sufficient length for supporting lighting units near the top and having a bottom adapted for grouting and vertically erecting the pole;

an annular carriage ring co-axially and movably mounted at top of said pole for supporting said lighting units comprising plurality of lights/lamps units fitted with connecting power cable, said carriage ring adapted to be moved up or down involving system of pulleys with a cooperative sling rope;

said system of pulleys inbuilt with respect to the hollow pole for sliding up or down the carriage ring along with said lights/lamps units fitted thereon to facilitate bringing down the light /lamp units to the ground level for maintenance and lifting it back after maintenance to its original position free of any ladder or trolley; and

an electrical feeder unit for housing electrical control gear units of said light/lamp units spaced apart from said high mast pole and said carriage ring supporting said light/lamp units at ground level to avoid damage of luminaries and/or control gears due to lightening such that when surge voltage and current or lightening current flow directly to the ground through shortest path of earthing strip without flowing through its gear unit and protect the gear unit.

A further aspect of the present invention in regard of the said high mast mounted multi-light system is that the length of the power cable between the lighting light/lamp units and the electrical feeder unit housing said gear unit is more than the height of the mast pole or lightening current flow path in the pole and preferably at least half the length of cable to supply power from gear unit to light/lamp units.

A still further aspect of the present invention is directed to said high mast mounted multi-light system comprising movable annular carriage ring arrangement comprising guide plate for providing support and guidance of carriage ring movement from top to bottom and vice versa involving cooperative longitudinally displaceable sling rope, a locking means for locking said carriage ring in lifted stable movement, said locking ring and sling further cooperatively connected to a lessening rope with pulley means such that for lowering the carriage ring the sling rope is unlocked from said locking means and allowed to move up by release of the loosening rope involving said puller means.

A still further aspect of the present invention is directed to said high mast mounted multi-light system comprising said hollow pole of selected length having a top flange for fixing Guide plate and rope guide pulleys at the at the top of vertically erecting pole;

said annular carriage ring co-axially and slidably mounted at top of said pole on which a plurality of lights/lamps are fitted with connecting power cable, said carriage ring adapted to be moved up or down connected through pulley with the attached sling rope;

said system of pulleys inbuilt in the hollow pole for sliding up or down the carriage ring along with the lights fitted thereon to facilitate bringing down the light filament units to the ground level for maintenance and take it back after maintenance to its original position without the use of any ladder or trolley; and

said electrical feeder pillar for the electrical control gear units of light fittings mounted in a cabinet placed at selective distance besides the high mast pole at ground level to avoid damage of luminaries and/or control gears due to lightening.

A still further aspect of the present invention is directed to said high mast mounted multi-light system wherein pulleys are fixed at the top and bottom portion of the inside hollow to facilitate the carriage ring to lift up and down through the attached sling rope.

A still further aspect of the present invention is directed to said high mast mounted multi-light system wherein to cover the pulleys at top of the pole, one closed plate is attached to top flange to avoid rain water entering the pole and affecting the mechanism.

Another aspect of the present invention is directed to said high mast mounted multi-light system comprises guide plate and rope guide pulleys for providing support and guidance of sling rope of the carriage ring and cable movement and keep the light fitting at desired height.

Yet another aspect of the present invention is directed to said high mast mounted multi-light system wherein cable guide bush is placed in the middle of the pole to separate sling rope and cable to prevent twisting with each other during up and down operation of light fitting fixed with carriage ring.

A further aspect of the present invention is directed to said high mast mounted multi-light system wherein a locking ring is used to rest on a locking bolt and keep the carriage ring at the top of pole during normal condition.

A still further aspect of the present invention is directed to said high mast mounted multi-light system wherein rope guide pulley is used to support and guidance of the rope during sliding down and bringing up the carriage ring on the top of the pole for maintenance and operation respectively.

A still further aspect of the present invention is directed to said high mast mounted multi-light system wherein the feeder pillar is fixed beside the high mast pole to accommodate electrical control gear box to distribute power to its equipment and provide short circuit protection and also to keep the cable in desire lengths for operation and maintenance.

A still further aspect of the present invention is directed to said high mast mounted multi-light system wherein the movement of carriage ring is restricted by providing stopper at the bottom of pole to take care of safety measure during mal-operation and bellow said stopper, holders are fixed to rest the carriage ring for maintenance.

A still further aspect of the present invention is directed to said high mast mounted multi-light system wherein said loosening rope comprise a poly propylene rope (pp rope) tied up safely with said locking ring before unlocking the locking ring from locking bolt.

Another aspect of the present invention is directed to said high mast mounted multi-light system wherein an earthing is connected to the pole to take care of short circuit and human safety.

Yet another aspect of the present invention is directed to said high mast mounted multi-light system wherein light fitting can be brought down to ground level with radial displacement of sling rope.

The above and other objects and advantages of the present invention are described hereunder in greater details with reference to the following accompanying non limiting illustrative drawings.

BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES

Figure 1: shows the schematic front view of the conventional high mast pole having both light fittings and electrical control gears mounted on carriage ring at top of pole causing frequent failure of luminaries.

Figure 2: shows the schematic front view of the high mast pole according to the present invention having light/lamp units (lamp with holder inside housing) mounted on carriage ring at top of pole but the electrical control gears are located at selective distance at ground level.

Figure 3: shows the schematic top view of the top flange of high mast pole used for erection of top pulley arrangement of the pole.

Figure 4: is the schematic side and top view of high mast wherein carriage ring arrangement for mounting of light/lamp units have been shown.

Figure 5: is the schematic illustration showing the feeder pillar and sling rope locking arrangement according to the present invention.

Figure 6: is the photograph showing carriage ring hanging on over sling rope and the maintenance persons checking the lamps mounted on carriage ring at ground level for testing purpose.

Figure 7: is the photograph showing the aesthetic look of the invented high mast pole with complete erected view alongwith multi-light units disposed on carriage ring at top of pole.

DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING FIGURES

The present invention is directed to provide a durable high mast mounted multi-light system having optimum pole height for desired all round illumination wherein a movable carriage ring with lamp fitting is located at the top of the pole, which can be brought down to ground level for maintenance by means of operating sling and pulley to enable faster maintenance to be done at ground level and raised back to the normal height in a safe and reliable manner with less manpower, so that no trolley or ladder will be required for maintenance work. Importantly, in the durable high mast lighting system according to the present invention the electrical control gears are selectively shifted at ground level to avoid damage/frequent failure of luminaries due to lightening.

Reference is first invited to the accompanying Figure 1 which illustrates the conventional high mast pole having both light fittings and electrical control gears mounted on carriage ring at top of pole causing frequent failure of luminaries. The traditional high mast pole is gear operated for lifting up and down the carriage ring with luminaries. All the luminaries alongwith electrical control gears are mounted at the top of the pole. The conventional high mast poles were made of hollow poles and a carriage ring was fixed at the top most level of the light pole. Conventionally mechanical gear assembly is used for lifting up and down operation of the carriage ring. The light fittings and electrical control gear boxes were mounted on it, which made the carriage ring heavier and exposed to atmosphere. During the rainy season the luminaries are directly exposed to lightening which damaged the lighting system and resulted in frequent break down and requirement of maintenance. This led to manpower wastage and increased maintenance costs.

To overcome the problems and limitations of the conventional high mast pole, a durable high mast pole is provide by way of the present invention which ensure minimum failure of lamps/luminaries and faster maintenance with less manpower and in lesser time and reliable operation of such lighting systems with enhanced life.

Reference is now invited to accompanying Figure 2 shows the schematic front view of the high mast pole according to the present invention having light/lamp units mounted on carriage ring at top of pole but the electrical control gears are located at selective distance at ground level wherein all the important components have been marked with respective reference numerals.

To overcome the problems in conventional arrangement for street or area lighting structure, the present invention provides a durable high mast pole with a movable carriage ring with lamp fitting fixed at the top of the pole, which can be brought down to ground level for maintenance by means of operating sling and pulley. As a result maintenance can be done at ground level. After the maintenance work is completed, the carriage ring can be raised back to the normal height. As the total time duration for maintenance is lower than the conventional one, hence more numbers of such poles can be attended during a given time period.

The durable high mast pole according to the invention comprises assembly of following components:
(i) a hollow pole,
(ii) carriage ring (on which the lights are fitted) can be movable through pulley with the attachment of sling rope, instead of conventional arrangement involving mechanical gear assembly,
(iii) a system of pulleys inbuilt in the hollow pole for sliding down the carriage ring, and
(iv) electrical feeder pillar for the gear box of light fittings mounted in a cabinet besides the high mast pole at ground level.

After the maintenance work is carried out on the light fittings, the carriage ring can be raised back to the normal height.

Accordingly this invention helps in bringing down the light filament units to the ground level for maintenance & after maintenance to take it back to its original position without the use of any ladder or trolley.

Accompanying Figure 2 shows a durable high mast lighting arrangement according to the present invention comprising of
a) A Guide plate(1) for providing support and guidance of sling rope (6) of the carriage ring(3) and cable movement and keep the light fitting(4) at desired height.
b) Cable guide bush(7) is used to separate the cable(5) and sling(6) to prevent twisting with each other during up and down operation.
c) Pulleys(2) are fixed at the top and bottom portion of the inside hollow space of pole to help the carriage ring(3) to lift up and down through the attached of sling rope(6).
d) Locking ring(11) is used to rest on the locking bolt(18) and keep the carriage ring(3) at the top of pole during normal condition.
e) Rope guide pulley(12) is used for support and guidance of the rope(6) during sliding down and bring up the carriage ring(3) on the top of the pole for maintenance and operation respectively.
f) Feeder pillar with door(16) is fixed beside the high mast pole to accommodate electrical control gear units(17) to distribute power to its equipment and provide short circuit protection. It’s also used to keep the cable in desire lengths for operation and maintenance.
g) Guide plate(1) and rope guide pulleys(12) are used to guide the carriage ring(3) (where light fitting are fixed) to move a desired height with help of sling rope(6) arrangement.
2) The movement of carriage ring(3) is restricted by providing stopper(8) at the bottom of pole to take care of safety measure during mal-operation. Bellow the stopper(8), holders(9) are fixed to rest the carriage ring(3) for maintenance.
3) Poly propylene rope (pp rope) to be tied up safely with locking ring(11), before unlocking the locking ring from locking bolt(18).
Poly propylene rope is also attached with sling rope with the locking ring, after unlocking the locking ring, the pp rope and cable to be released slowly to move down the carriage ring until reached and held on holder bolt after removing the stopper when carriage ring reaches near to it. Poly propylene rope can be pulled from ground level to move up the light fitting to a normal height and moved down to ground level for maintenance. Light fitting can be brought down to ground level with radial displacement of sling rope of 9Mtrs distance. Cable guide bush (7) is placed in the middle of the pole to separate sling rope and cable during up and down operation of light fitting fixed with carriage ring to prevent twisting with each other.
4) One earthing is connected to the pole to take care of short circuit and human safety.
5) As a precautionary measure during sliding of carriage ring, pp rope and cable are to be released simultaneously to bring down the light fitting at ground level.
6) As a precautionary measure No person should stand under the carriage ring during sliding of carriage ring.
7) Maintenance of all the lights and glowing of the lights should be checked/tested at ground level before taking it to a height.
8) After completion of maintenance work, pole cover is to be locked and main switch to be made ON.
9) Minimum 3 persons should be available for maintenance work.

Accompanying Figure 3 shows the schematic top view of the top flange of high mast pole. The top flange is a annular shaped steel plate having circumferential holes, The inner opening of the top flange is welded to the top outer diameter of pole to facilitate the erection of Guide plate with holding bolts through the holes of flange.

Accompanying Figure 4 shows the schematic side and top view of high mast wherein carriage ring arrangement for mounting of light/lamp units have been shown. Carriage ring(1) is an annular steel plate on which the light fittings(2) are mounted. The carriage ring is suspended with wire rope(3) placed over pulleys mounted at top of pole. The pulleys are attached on the pole with one closed plate attached to top flange to avoid rain water entering the pole and affecting the mechanism. Pulleys are arranged on top of the pole in a manner to guide the sling rope(3) and supply cable to move carriage ring(1) up or down for desired purpose of mounting/maintenance of lamp fittings(4). Top flange (5) is fixing at the top of the pole to support the Guide plate(6) and rope guide pulleys(7).

Accompanying Figure 5 shows the feeder pillar and sling rope locking arrangement according to the present invention. Electrical Control gear units for the light fittings are mounted inside a feeder pillar /box fixed at ground level near the pole. Most importantly, light filament and its electrical gear unit inter connection distance is increased more than double of pole earthing length, which eliminates damaging the lighting equipments due to lightening and increases the life of the luminaries by more than double the normal life. A locking arrangement has been incorporated to prevent mal-operation of the sling rope and gear units during idle condition by raising/lowering of the carriage ring with light/lamp units mounted thereon.

During maintenance, the carriage ring hangs on over sling rope near ground level. Accompanying Figure 6 is a photograph showing carriage ring hanging on over sling rope and the maintenance persons checking the lamps mounted on carriage ring at ground level for testing purpose.

Accompanying Figure 7 is a photograph showing the aesthetic look of the invented high mast pole with complete erected view alongwith multi-light units on carriage ring at top of pole.

The working instructions to be followed by the persons carrying out maintenance work of lights in the high mast lighting system are as follows:
(i) Electrical Control Switch and Main Switch are to be made OFF
before doing any maintenance work.
(ii) Poly propylene rope (pp rope) to be tied up safely with locking ring before unlocking the locking ring.
(iii) No person should stand under the light fitting during sliding of lights.
(iv) PP rope to be overlapped with sliding pulley and rope and
cable to be released slowly up to carrier holder (stopper).
(v) All the light maintenance and glowing to be checked at ground
level before taking it to a height.
(vi) After maintenance work is over, PP rope is to be pulled and locking ring to be kept inside holding bolt.
(vii) Pole cover is to be locked after removing PP rope.
(viii) Spare cable to be woundup and kept inside feeder pillar and to be locked.
(x) Minimum 3 persons should be available for maintenance work.
(ix) Main switch is to be made ON for operation.
The durable high mast lighting system is the system where the lamps are attached with the carriage ring and it goes to desired height of the pole without electrical gear units (17) and is brought back to ground level for maintenance. The gear units (17) are kept at ground level inside the feeder pillar to protect from lightening, rain and dust and are easy for maintenance as shown in figure 2. The height of the high mast pole is 12Mts. The length of cable is maintained more than double(>24Mts.) to supply power from gear unit (17) to light fitting (4) so that light glows, the earthing path(Strip) of the pole being less than cable length of gear unit to light/lamp units. With this implement, when surge voltage and current or lightening current will flow directly to the ground through shortest path of earthing strip without flowing through its gear unit (17). Due to that surge voltage will not affect its gear units (17).

In the conventional system as shown in figure 1, the light fitting (3) and gear unit(2) are kept at the top of the pole and lightening current will pass through the gear unit and damage it frequently. In the conventional system the height of the high mast pole is 21mts. Due to that it becomes very easy for discharging lightening voltage through pole. This is the main cause for damaging the gear units at the top resulting failure in the lighting system which requires frequent maintenance, causes wastage of man, material, money and time. In the conventional system we need to maintain the high mast system at an interval of 15days for replacing gear unit (electrical). In the new system, the gear unit need not be checked until the filament is burnt off. The new lighting system is under use for last couple of year, where only some lamps are changed and holders were replaced which was carbonized at the contact point due to moisture. Thus the present invention helps to save lots of man, material, money and time.
It is thus apparent from the above that the high mast pole based multi-light system according to the present invention offer the following advantageous features:
1) This invention increases the life of the luminaries by more than double the normal life of the high mast pole fittings. Optimum utilization of materials is done by this technology. Drastic reduction of utilization of manpower and maintenance cost is achieved by this process. Lighting is done without trolley or ladder and safety aspects are ensured. Estimated annual saving under labour head Rs. 80,490 /- and total saving by this project Rs = 3,63,955 /-. Any reduction in man power, time required and frequency of maintenance, helps in improving the reliability.
2) Light filament and its electrical gear unit inter connection distance is increased more than double of pole earthing length, which eliminates damaging the lighting equipments due to lightening.
3) By using simple method of high mast carriage ring (with light fittings mounted thereon) lifting arrangement, break down on account of motor/gear box had been completely eliminated.
4) Street light maintenance time has been reduced because immediate maintenance is possible without any trolley or ladder.
5) Utilization of maintenance area is reduced because no trolley or ladder is used.
6) There is no need for climbing to a height for maintenance work- as a result fatal accidents are avoided.
7) Lighting height and angle can be adjusted as per requirement.
8) Desired illumination of 750 lux is achieved and uniform lighting is provided in the pole surrounding.
9) Use of metal halide fittings increases the life of lighting system and reduces maintenance cost. Other type of lights can be used as per requirement.
10) The pole weight and structure is less, which reduces pole grouting and other costs of the pole.
11) Although a cylindrical pole is used for the purpose of the invention, if required any type of hollow pole can be adopted.
12) A (2x4) Nos. of light fitted pole structure has been used in this invention. The same principle can be applied for more than four fittings structure pole also.
13) The basic concept of using the high mast system is that it eliminates transportation of ladder / trolley in the restricted area (like pump house, garden area etc.) and minimum man power and time are required for maintenance and as a result maximum amount of complaints can be attended to within minimum time with less man power saving labour cost. Life of the luminaries are increased more than double by above technology. This type of technology has never been used in the lighting systems earlier and can be applied with above advantages in areas like:
-PUMP HOUSES.
-OUT DOOR STADIUM.
-OUTSIDE THE SHOP FLOOR.
-LARGE PROJECT AREA.
-MULTI LANE ROAD CROSSING (CHOWK).
-GARDEN AREA LIGHTING.
-RURAL AREA LIGHTING.
-BOUNDARY AREA LIGHTING OF ANY BUILDING /INDUSTRY.

It is thus possible by way of the present invention to provide a durable high mast mounted multi-light system having light fittings mounted on a carriage ring at top of pole which can be moved up and down as per need for installation/maintenance work so that no trolley or ladder will be required for maintenance work. The electrical control gears for the lights are located at distant place in a feeder pillar/ box at ground level. The carriage ring is attached with sling ropes to pull the ring upward for certain height and also moved downward for maintenance. The durable high mast lighting system enable maintenance of lights to be carried out with minimum manpower and minimum time in a safe and reliable manner while also reduces frequency of failure of lights due to lightening and enhance life of the light fittings.

We Claim:
1. A high mast mounted multi-light system comprising

a hollow pole of sufficient length for supporting lighting units near the top and having a bottom adapted for grouting and vertically erecting the pole;

an annular carriage ring co-axially and movably mounted at top of said pole for supporting said lighting units comprising plurality of lights/lamps units fitted with connecting power cable, said carriage ring adapted to be moved up or down involving system of pulleys with a cooperative sling rope;

said system of pulleys inbuilt with respect to the hollow pole for sliding up or down the carriage ring alongwith said lights/lamps units fitted thereon to facilitate bringing down the light /lamp units to the ground level for maintenance and lifting it back after maintenance to its original position free of any ladder or trolley; and

an electrical feeder unit for housing electrical control gear units of said light/lamp units spaced apart from said high mast pole and said carriage ring supporting said light/lamp units at ground level to avoid damage of luminaries and/or control gears due to lightening such that when surge voltage and current or lightening current flow directly to the ground through shortest path of earthing strip without flowing through its gear unit and protect the gear unit.

2. A high mast mounted multi-light system as claimed in claim 1 wherein the length of the power cable between the lighting light/lamp units and the electrical feeder unit housing said gear unit is more than the height of the mast pole or lightening current flow path in the pole and preferably at least half the length of cable to supply power from gear unit to light/lamp units.

3. A high mast mounted multi-light system as claimed in anyone of claims 1 or 2 comprising movable annular carriage ring arrangement comprising guide plate for providing support and guidance of carriage ring movement from top to bottom and vice versa involving cooperative longitudinally displaceable sling rope , a locking means for locking said carriage ring in lifted stable disposition, said locking ring and sling further cooperatively connected to a Poly propylene rope with pulley means such that for lowering the carriage ring the sling rope is unlocked from said locking means and allowed to move up by release of the loosening rope involving said puller means.
4. A high mast mounted multi-light system, as claimed in anyone of claims 1 to 3 comprising

said hollow pole of selected length having a bottom plate for grouting and vertically erecting the pole;

said annular carriage ring co-axially and slidably mounted at top of said pole on which a plurality of lights/lamps are fitted with connecting power cable, said carriage ring adapted to be moved up or down connected through pulley with the attached sling rope;

said system of pulleys inbuilt in the hollow pole for sliding up or down the carriage ring alongwith the lights fitted thereon to facilitate bringing down the light filament units to the ground level for maintenance and take it back after maintenance to its original position without the use of any ladder or trolley; and

said electrical feeder pillar for the electrical control gear units of light fittings mounted in a cabinet placed at selective distance besides the high mast pole at ground level to avoid damage of luminaries and/or control gears due to lightening.

5. A high mast mounted multi-light system as claimed in anyone of claims 1 to 4 wherein pulleys are fixed at the top and bottom portion of the inside hollow portion of pole to facilitate the carriage ring to lift up and down through the attached sling rope.

6. A high mast mounted multi-light system as claimed in anyone of claims 1 to 5 wherein to cover the pulleys at top of the pole, one closed plate is attached to top to avoid rain water entering the pole and affecting the mechanism.

7. A high mast mounted multi-light system as claimed in anyone of claims 1 to 6 comprises guide plate and rope guide pulleys for providing support and guidance of sling rope of the carriage ring and cable movement and keep the light fitting at desired height.

8. A high mast mounted multi-light system as claimed in anyone of claims 1 to 7 wherein cable guide bush is placed in the middle of the pole to separate sling rope and cable to prevent twisting with each other during up and down operation of light fitting fixed with carriage ring.

9. A high mast mounted multi-light system as claimed in anyone of claims 1 to 8 wherein a locking ring is used to rest on a locking bolt and keep the carriage ring at the top of pole during normal condition.

10. A high mast mounted multi-light system as claimed in anyone of claims 1 to 9 wherein rope guide pulley is used to support and guidance of the rope during sliding down and bringing up the carriage ring on the top of the pole for maintenance and operation respectively.

11. A high mast mounted multi-light system as claimed in anyone of claims 1 to 10 wherein the feeder pillar is fixed beside the high mast pole to accommodate electrical control gear unit to distribute power to its equipment and provide short circuit protection and also to keep the cable in desire lengths for operation and maintenance.
12. A high mast mounted multi-light system as claimed in anyone of claims 1 to 11 wherein the movement of carriage ring is restricted by providing stopper at the bottom of pole to take care of safety measure during mal-operation and bellow said stopper, holders are fixed to rest the carriage ring for maintenance.
13. A high mast mounted multi-light system as claimed in anyone of claims 1 to 12 wherein said loosening rope comprise a poly propylene rope (pp rope) tied up safely with said locking ring before unlocking the locking ring from locking bolt.

14. A high mast mounted multi-light system as claimed in anyone of claims 1 to 13 wherein an earthing is connected to the pole to take care of short circuit and human safety.

15. A high mast mounted multi-light system as claimed in anyone of claims 1 to 14 wherein light fitting can be brought down to ground level with radial displacement of sling rope.

Dated this the 8th day of May, 2015

Anjan Sen
Of Anjan Sen & Associates
(Applicants Agent)

ABSTRACT

TITLE: A DURABLE HIGH MAST MOUNTED MULTI-LIGHT SYSTEM.

The present invention is a durable high mast mounted multi-light system having light fittings mounted on a carriage ring at top of pole which can be moved up and down as per need so that no trolley or ladder will be required for maintenance work. The carriage ring is attached with sling ropes to pull the ring upward for certain height for normal operation and downward for maintenance. A guide plate provides support and guidance of carriage ring for easy movement from top to bottom by displacement of sling rope longitudinally. Locking ring is attached to carriage ring through sling rope and poly propylene rope (pp rope) to be tied up safely with locking ring before unlocking the locking ring from locking bolt at the ground level. Pp rope is slowly released through rope guide pulley to ground level until carriage ring rests on holder bolt. This lighting system substantially reduces the maintenance cost and increases the life of the luminaries by more than double.
(Figure 2)