Wisdom street lamp is with modularization lamp pole that has equipment expansion groove function

文档序号:1902359 发布日期:2021-11-30 浏览:4次 中文

阅读说明:本技术 一种智慧路灯用具有设备扩展槽功能的模块化灯杆 (Wisdom street lamp is with modularization lamp pole that has equipment expansion groove function ) 是由 龙慧斌 蔡明� 刘佳 仇飞 李刚 明华新 花盛林 那贺 夏国飞 于 2021-08-18 设计创作,主要内容包括:本申请公开了一种智慧路灯用具有设备扩展槽功能的模块化灯杆,包括第一灯杆、第二灯杆、第三灯杆和第四灯杆,所述第四灯杆从下到上依次包括第一圆环部、第二圆环部和第三圆环部,所述第四灯杆处具有多个安装位,每个安装位处能够安装一个设备拓展单元,所述设备拓展单元包括与第一弧形滑块连接的第一弧形连接板、与连接块固定连接的第二弧形连接板,所述第一弧形连接板通过第一连接杆连接有拓展座,所述第二弧形连接板和第一连接杆之间连接有第二连接杆。本申请的灯杆适于外界拓展设备,且方便对拓展设备维护。(The application discloses wisdom street lamp is with modularization lamp pole that has equipment expansion groove function, including first lamp pole, second lamp pole, third lamp pole and fourth lamp pole, the fourth lamp pole from the bottom up includes first ring portion, second ring portion and third ring portion in proper order, fourth lamp pole department has a plurality of installation positions, and an equipment expansion unit can be installed to every installation position department, equipment expansion unit includes the first arc connecting plate of being connected with first arc slider, with connecting block fixed connection's second arc connecting plate, first arc connecting plate is connected with the expansion seat through the head rod, be connected with the second connecting rod between second arc connecting plate and the head rod. The lamp pole of this application is suitable for external expansion equipment, and convenient to expand equipment maintenance.)

1. A modular lamp post with an equipment expansion slot function for an intelligent street lamp is characterized by comprising a first lamp post, a second lamp post, a third lamp post and a fourth lamp post, wherein mounting flanges are arranged at the bottom end of the first lamp post, the top end of the second lamp post, the top end of the third lamp post and the bottom end of the fourth lamp post, the first lamp post and the third lamp post are fixedly connected, and the second lamp post and the fourth lamp post are fixedly connected; the bottom end of the third lamp pole is fixedly provided with a plurality of inserted rods, the fourth lamp pole sequentially comprises a first circular ring part, a second circular ring part and a third circular ring part from bottom to top, a plurality of installation positions are arranged at the fourth lamp pole, each installation position can be provided with an equipment expansion unit, each installation position comprises a chute, a slot and a through groove, the slot is located at the first circular ring part, the through groove is communicated with the outer side wall of the first circular ring part and the slot, the chute extends to the bottom end of the slot from the top end of the third circular ring part, and the outer diameters of the first circular ring part, the second circular ring part and the third circular ring part are sequentially reduced; the first circular ring part is also provided with a plurality of jacks, the number of the jacks is equal to that of the inserted bars, through holes communicated with the jacks are formed in the jacks, threaded holes are formed in the inserted bars, first bolts are arranged at the through holes and the threaded holes to fixedly connect the inserted bars with the first circular ring part, and the third circular ring part is inserted into the third lamp post; each installation position is provided with an equipment connecting unit, each equipment connecting unit comprises a first arc-shaped sliding block and a second arc-shaped sliding block, the first arc-shaped sliding block is connected with a first sliding rod, the second arc-shaped sliding block is connected with a second sliding rod, the first sliding rod is connected with the second sliding rod, the first sliding rod and the second sliding rod can slide in the sliding grooves, a connecting block is fixed at the second sliding rod, the first arc-shaped sliding block is inserted into the slot, and the top end of the second arc-shaped sliding block is inserted between the third circular ring part and the third lamp pole; the equipment expanding unit comprises a first arc-shaped connecting plate and a second arc-shaped connecting plate, the first arc-shaped connecting plate is connected with a first arc-shaped sliding block, the second arc-shaped connecting plate is fixedly connected with a connecting block, the first arc-shaped connecting plate is connected with an expanding seat through a first connecting rod, and a second connecting rod is connected between the second arc-shaped connecting plate and the first connecting rod.

2. The intelligent street lamp pole with the function of the equipment expanding groove as claimed in claim 1, wherein the first circular ring part, the second circular ring part and the third circular ring part are integrally formed, and the inner diameters of the first circular ring part, the second circular ring part and the third circular ring part are equal; the outer diameter of the second arc-shaped sliding block is equal to that of the second circular ring part.

3. The intelligent street lamp pole with the function of the equipment expansion slot as claimed in claim 1, wherein the number of the inserted rods is 4, and the 4 inserted rods are distributed in a ring shape at equal intervals.

4. The intelligent street lamp pole with the function of the equipment expansion slot as claimed in claim 1, wherein the number of the installation positions is 4, and the 4 installation positions are distributed in a ring shape at equal intervals.

5. The intelligent street lamp pole with the function of the equipment expansion slot as claimed in claim 1, wherein the first arc-shaped sliding block and the first arc-shaped connecting plate are fixed through bolts, and the connecting block and the second arc-shaped connecting plate are fixed through bolts.

6. The intelligent street lamp pole with the function of the equipment expansion slot as claimed in claim 1, wherein the expansion base comprises a horizontal mounting plate and a vertical mounting plate connected with the horizontal mounting plate, and the horizontal mounting plate and the vertical mounting plate are provided with mounting through holes; and a reinforcing rib is connected between the vertical mounting plate and the first connecting rod.

7. The modular lamp pole with the function of the equipment expanding groove for the smart street lamp as claimed in claim 1, wherein the first arc-shaped connecting plate is positioned in the through groove, the top end of the first arc-shaped connecting plate abuts against the top end of the through groove, and the bottom end of the first arc-shaped connecting plate abuts against the bottom end of the through groove; the bottom end of the second arc-shaped sliding block is abutted to the top end of the second circular ring part.

8. The intelligent street lamp pole with the function of equipment expanding slot as claimed in claim 1, wherein the top end of the first sliding rod and the bottom end of the second sliding rod are hinged through a hinge component, the installation site can be in a maintenance state, in the maintenance state, the first sliding rod and the second sliding rod are in a vertical state, the first sliding rod abuts against the top end of the first circular ring part, and the top end of the second arc-shaped sliding block is located between the third circular ring part and the third lamp pole; the first arc-shaped sliding block is provided with an installation groove, and a reminding unit can be fixedly installed at the installation groove; the reminding unit comprises a light source part and a mounting box, and a control unit, a power supply unit, a wireless communication unit, a GPS unit and a memory unit are mounted in the mounting box.

9. The modular lamp post with the function of equipment expansion slot for the smart street lamp according to claim 8, wherein the installation groove penetrates through the first arc-shaped sliding block and the first sliding rod, the reminding unit comprises an arc-shaped limiting rod, a vertical rod connected with the arc-shaped limiting rod and positioned in the installation groove, the installation box positioned at the bottom end of the vertical rod and the light source part positioned at the bottom end of the installation box; the vertical rod is provided with a second bolt for fixing the vertical rod in the mounting groove.

10. The modular lamp post with the function of the equipment expanding groove for the smart street lamp as claimed in claim 9, wherein a lampshade is installed at the first circular ring part, a water leakage hole is formed at the bottom end of the lampshade, a plurality of light source inserting holes are formed at the top end of the lampshade, the number of the light source inserting holes is equal to the number of the installation positions, when the reminding unit is fixedly installed at the installation groove, the installation box is inserted into the light source inserting holes, and a circular flange is formed at the installation box; a shielding block capable of sealing the light source jack is fixed at the first connecting rod; the annular flange and the shielding block are both made of rubber materials; the inner side wall of the lampshade is provided with a plurality of reflection areas, and reflection coatings are arranged at the reflection areas.

Technical Field

The application relates to the field of street lamps, concretely relates to wisdom street lamp is with modularization lamp pole that has equipment expansion groove function.

Background

The smart city is a concept newly proposed in recent years, and mainly benefits from the development and application of internet technology and artificial intelligence technology, and from the technical development perspective, the smart city construction requires the realization of comprehensive perception, ubiquitous interconnection, pervasive computing and fusion application through the application of new-generation information technologies such as internet of things and cloud computing represented by mobile technology. Therefore, the smart city is actually a combination of software and hardware, so that the urban illumination street lamp is used as a component of an important infrastructure of the city, has a non-negligible effect on the construction of the smart city, but needs to be improved, and the street lamp is novel in design and convenient for installation of various smart city devices, and needs to be convenient for installation and maintenance of the devices.

Disclosure of Invention

The purpose of the invention is as follows: the utility model provides a wisdom street lamp is with modularization lamp pole that has equipment expansion groove function aims at overcoming prior art's defect.

The technical scheme is as follows: a lamp post for an intelligent street lamp comprises a first lamp post, a second lamp post, a third lamp post and a fourth lamp post, wherein mounting flanges are arranged at the bottom end of the first lamp post, the top end of the second lamp post, the top end of the third lamp post and the bottom end of the fourth lamp post, the first lamp post is fixedly connected with the third lamp post, and the second lamp post is fixedly connected with the fourth lamp post; the bottom end of the third lamp pole is fixedly provided with a plurality of inserted rods, the fourth lamp pole sequentially comprises a first circular ring part, a second circular ring part and a third circular ring part from bottom to top, a plurality of installation positions are arranged at the fourth lamp pole, each installation position can be provided with an equipment expansion unit, each installation position comprises a chute, a slot and a through groove, the slot is located at the first circular ring part, the through groove is communicated with the outer side wall of the first circular ring part and the slot, the chute extends to the bottom end of the slot from the top end of the third circular ring part, and the outer diameters of the first circular ring part, the second circular ring part and the third circular ring part are sequentially reduced; the first circular ring part is also provided with a plurality of jacks, the number of the jacks is equal to that of the inserted bars, through holes communicated with the jacks are formed in the jacks, threaded holes are formed in the inserted bars, first bolts are arranged at the through holes and the threaded holes to fixedly connect the inserted bars with the first circular ring part, and the third circular ring part is inserted into the third lamp post; each installation position is provided with an equipment connecting unit, each equipment connecting unit comprises a first arc-shaped sliding block and a second arc-shaped sliding block, the first arc-shaped sliding block is connected with a first sliding rod, the second arc-shaped sliding block is connected with a second sliding rod, the first sliding rod is connected with the second sliding rod, the first sliding rod and the second sliding rod can slide in the sliding grooves, a connecting block is fixed at the second sliding rod, the first arc-shaped sliding block is inserted into the slot, and the top end of the second arc-shaped sliding block is inserted between the third circular ring part and the third lamp pole; the equipment expanding unit comprises a first arc-shaped connecting plate and a second arc-shaped connecting plate, the first arc-shaped connecting plate is connected with a first arc-shaped sliding block, the second arc-shaped connecting plate is fixedly connected with a connecting block, the first arc-shaped connecting plate is connected with an expanding seat through a first connecting rod, and a second connecting rod is connected between the second arc-shaped connecting plate and the first connecting rod.

Further, the first circular ring part, the second circular ring part and the third circular ring part are integrally formed, and the inner diameters of the first circular ring part, the second circular ring part and the third circular ring part are equal; the outer diameter of the second arc-shaped sliding block is equal to that of the second circular ring part.

Therefore, the structure of the fourth lamp pole is more reasonable, the equipment connecting unit is convenient to slide, and sufficient strength is provided.

Furthermore, the quantity of inserted bar is 4, and 4 inserted bars are the equidistant distribution of annular.

Furthermore, the installation position has 4, and 4 installation positions are the annular equidistant distribution.

Therefore, a sufficient number of expansion devices can be installed, and the number of specific installation positions can be selected according to needs.

Further, the first arc-shaped sliding block and the first arc-shaped connecting plate are fixed through bolts, and the connecting block and the second arc-shaped connecting plate are fixed through bolts.

Further, the expansion seat comprises a horizontal mounting plate and a vertical mounting plate connected with the horizontal mounting plate, and mounting through holes are formed in the horizontal mounting plate and the vertical mounting plate; and a reinforcing rib is connected between the vertical mounting plate and the first connecting rod.

Thereby make the installation of expanding the seat firm to but expansion performance is strong, the external device variety that can install is many.

Furthermore, the first arc-shaped connecting plate is positioned in the through groove, the top end of the first arc-shaped connecting plate is abutted against the top end of the through groove, and the bottom end of the first arc-shaped connecting plate is abutted against the bottom end of the through groove; the bottom end of the second arc-shaped sliding block is abutted to the top end of the second circular ring part.

Further, the top end of the first sliding rod and the bottom end of the second sliding rod are hinged through a hinge component, the installation position can be in a maintenance state, in the maintenance state, the first sliding rod and the second sliding rod are in a vertical state, the first sliding rod abuts against the top end of the first circular ring part, and the top end of the second arc-shaped sliding block is located between the third circular ring part and the third lamp post; the first arc-shaped sliding block is provided with an installation groove, and a reminding unit can be fixedly installed at the installation groove; the reminding unit comprises a light source part and a mounting box, and a control unit, a power supply unit, a wireless communication unit, a GPS unit and a memory unit are mounted in the mounting box.

Furthermore, the hinge component is an elastic reset hinge component, and when no external force exists, the first sliding rod and the second sliding rod are vertical.

Furthermore, the installation groove penetrates through the first arc-shaped sliding block and the first sliding rod, and the reminding unit comprises an arc-shaped limiting rod, a vertical rod connected with the arc-shaped limiting rod and located in the installation groove, the installation box located at the bottom end of the vertical rod and the light source portion located at the bottom end of the installation box; the vertical rod is provided with a second bolt for fixing the vertical rod in the mounting groove.

Further, the vertical rod is provided with a through hole, and the mounting groove is provided with a threaded hole.

Furthermore, a lampshade is installed at the first circular ring part, a water leakage hole is formed in the bottom end of the lampshade, a plurality of light source jacks are formed in the top end of the lampshade, the number of the light source jacks is equal to that of the installation positions, when the reminding unit is fixedly installed at the installation groove, the installation box is inserted into the light source jacks, and a circular ring-shaped flange is arranged at the installation box; a shielding block capable of sealing the light source jack is fixed at the first connecting rod; the annular flange and the shielding block are both made of rubber materials; the inner side wall of the lampshade is provided with a plurality of reflection areas, and reflection coatings are arranged at the reflection areas.

Further, the outer side of the mounting box has an elastic cladding (e.g., a rubber cladding). Thereby the mounting box inserts in the light source through-hole more sealed and more firm.

Has the advantages that: the utility model provides a modularization lamp pole realizes the use of complete lamp pole through the mode of equipment to lamp pole department has equipment linkage unit and equipment expansion unit, thereby can set up a plurality of installation positions, and the equipment that wisdom city required to use can both be installed to every installation position, and because wisdom street lamp need maintain the frequency height, the lamp pole of this application is favorable to reducing the work load of maintaining, makes the lamp pole more be convenient for maintain.

Drawings

Fig. 1 is a schematic view of 4 equipment expansion units installed on a lamp post;

FIG. 2A is an enlarged view of the area;

FIG. 3 is an exploded view of a lamp post part;

FIG. 4B is an enlarged view of the area;

FIG. 5 is an exploded view of a lamp post part with the equipment expansion bracket separated;

FIG. 6C is an enlarged view of the area;

FIG. 7 is an exploded view of a lamp post part with the equipment expansion bracket separated and the equipment connection unit pulled up;

FIG. 8D shows an enlarged view of the area;

FIG. 9 is a schematic view of a lamp pole with one of the mounting locations in a maintenance state and the prompting unit separated;

FIG. 10E shows an enlarged view of the area;

fig. 11 is a schematic view of a lamp pole with one of the mounting positions in a maintenance state, and the prompting unit is located in the mounting groove;

FIG. 12F is an enlarged view of the area;

Detailed Description

Reference numerals: 1 a first lamp pole; 2 a second light pole; 3 a third lamp pole; 3.1 inserting the rod; 4 a first circular ring part; 4.1, a through groove; 4.2 lamp shade; 4.2.1 light source jack; 4.3 inserting holes; 4.4 first bolt; 4.5 slot; 5 a second circular ring part; 6 a third circular part; 7, a chute; 8, a device expansion unit; 8.1 a first arc-shaped connecting plate; 8.2 a second arc-shaped connecting plate; 8.3 expanding the seat; 8.4 the blocking block; 9 a device connection unit; 9.1 a first arc-shaped sliding block; 9.1.1 installing a groove; 9.2 connecting blocks; 9.3 second arc-shaped sliding blocks; 10 a reminding unit; 10.1 an arc-shaped limiting rod; 10.2 vertical rods; 10.3 mounting the box; 10.4 circular flange; 10.5 light source section.

As shown in the figure: a modular lamp pole with an equipment expansion slot function for an intelligent street lamp comprises a first lamp pole 1, a second lamp pole 2, a third lamp pole 3 and a fourth lamp pole, wherein mounting flanges are arranged at the bottom end of the first lamp pole 1, the top end of the second lamp pole 2, the top end of the third lamp pole 3 and the bottom end of the fourth lamp pole, the first lamp pole 1 and the third lamp pole 3 are fixedly connected, and the second lamp pole 2 and the fourth lamp pole are fixedly connected; the bottom end of the third lamp pole 3 is fixed with a plurality of inserting poles 3.1, the fourth lamp pole sequentially comprises a first circular ring part 4, a second circular ring part 5 and a third circular ring part 6 from bottom to top, a plurality of installation positions are arranged at the fourth lamp pole, each installation position can be provided with an equipment expanding unit 8, each installation position comprises a chute 7, a slot 4.5 positioned at the first circular ring part 4 and a through groove 4.1 communicating the outer side wall of the first circular ring part 4 with the slot 4.5, the chute 7 extends from the top end of the third circular ring part 6 to the bottom end of the slot 4.5, and the outer diameters of the first circular ring part 4, the second circular ring part 5 and the third circular ring part 6 are sequentially reduced; the first circular part 4 is also provided with a plurality of jacks 4.3, the number of the jacks 4.3 is equal to that of the inserted rods 3.1, the jacks 4.3 are provided with through holes communicated with the jacks 4.3, the inserted rods are provided with threaded holes, the through holes and the threaded holes are provided with first bolts 4.4 for fixedly connecting the inserted rods 3.1 with the first circular part 4, and the third circular part 6 is inserted into the third lamp post 3; each installation position is provided with an equipment connecting unit 9, each equipment connecting unit 9 comprises a first arc-shaped sliding block 9.1 and a second arc-shaped sliding block 9.3, each first arc-shaped sliding block 9.1 is connected with a first sliding rod, each second arc-shaped sliding block 9.3 is connected with a second sliding rod, each first sliding rod is connected with each second sliding rod, each first sliding rod and each second sliding rod can slide in the corresponding sliding groove 7, each second sliding rod is fixedly provided with a connecting block 9.2, each first arc-shaped sliding block 9.1 is inserted into each slot, and the top end 9.3 of each second arc-shaped sliding block is inserted between the corresponding third circular ring part 6 and the corresponding third lamp post 3; the equipment expanding unit 8 comprises a first arc-shaped connecting plate 8.1 connected with a first arc-shaped sliding block 9.1 and a second arc-shaped connecting plate 8.2 fixedly connected with a connecting block 9.2, the first arc-shaped connecting plate 8.1 is connected with an expanding seat 8.3 through a first connecting rod, and a second connecting rod is connected between the second arc-shaped connecting plate 8.2 and the first connecting rod.

The first circular part 4, the second circular part 5 and the third circular part 6 are integrally formed, and the inner diameters of the first circular part 4, the second circular part 5 and the third circular part 6 are equal; the outer diameter of the second arc-shaped sliding block 9.3 is equal to the outer diameter of the second circular ring part 5. The quantity of inserted bar 3.1 is 4, and 4 inserted bars 3.1 are the equidistant distribution of annular. The installation position has 4, and 4 installation positions are the annular equidistant distribution. The first arc-shaped sliding block 9.1 and the first arc-shaped connecting plate 8.1 are fixed through bolts, and the connecting block 9.2 and the second arc-shaped connecting plate 8.2 are fixed through bolts. The expansion seat 8.3 comprises a horizontal mounting plate and a vertical mounting plate connected with the horizontal mounting plate, and mounting through holes are formed in the horizontal mounting plate and the vertical mounting plate; and a reinforcing rib is connected between the vertical mounting plate and the first connecting rod. The first arc-shaped connecting plate 8.1 is positioned in the through groove, the top end of the first arc-shaped connecting plate 8.1 is abutted against the top end of the through groove, and the bottom end of the first arc-shaped connecting plate 8.1 is abutted against the bottom end of the through groove; the bottom end of the second arc-shaped sliding block 9.3 is abutted to the top end of the second circular ring part 5.

The top end of the first sliding rod is hinged with the bottom end of the second sliding rod through a hinge component, the installation position can be in a maintenance state, in the maintenance state, the first sliding rod and the second sliding rod are in a vertical state, the first sliding rod is abutted against the top end of the first circular ring part 4, and the top end of the second arc-shaped sliding block is located between the third circular ring part and the third lamp post; an installation groove 9.1.1 is formed in the first arc-shaped sliding block 9.1, and a reminding unit 10 can be fixedly installed in the installation groove 9.1.1; the reminding unit comprises a light source part 10.5 and a mounting box 10.3, and a control unit, a power supply unit, a wireless communication unit, a GPS unit and a memory unit are installed in the mounting box 10.3. The mounting groove 9.1.1 penetrates through the first arc-shaped sliding block 9.1 and the first sliding rod, and the reminding unit 10 comprises an arc-shaped limiting rod 10.1, a vertical rod 10.2 which is connected with the arc-shaped limiting rod 10.1 and is positioned in the mounting groove 9.1.1, a mounting box 10.3 which is positioned at the bottom end of the vertical rod 10.2, and a light source part 10.5 which is positioned at the bottom end of the mounting box 10.3; the position of the vertical rod 10.2 is provided with a second bolt for fixing the vertical rod in the mounting groove 9.1.1. A lampshade 4.2 is arranged at the first circular part 4, water leakage holes are formed in the bottom end of the lampshade 4.2, a plurality of light source jacks 4.2.1 are formed in the top end of the lampshade 4.2, the number of the light source jacks 4.2.1 is equal to that of the installation positions, when the reminding unit is fixedly installed at the installation groove 9.1.1, the installation box 10.3 is inserted into the light source jacks 4.2.1, and a circular flange 10.4 is formed at the installation box 10.3; a shielding block 8.4 capable of sealing the light source jack 4.2.1 is fixed at the first connecting rod; the circular flange 10.4 and the baffle block 8.4 are both made of rubber materials; the inner side wall of the lamp shade 4.2 has a plurality of reflective areas where a reflective coating is provided.

As shown in the figures, the first lamp pole, the second lamp pole, the third lamp pole and the fourth lamp pole of the present application are fixedly installed together (in the figures, the first lamp pole and the second lamp pole are shown to be short, and can be manufactured to any required length in practice), and the two adjacent lamp poles are fixedly connected through the mounting flange; fourth lamp pole department has a plurality of installation positions to every installation position department installs an equipment connecting unit, as shown in the figure, equipment connecting unit can slide from top to bottom along the spout, and first arc connecting plate and first arc slider fixed connection, second arc connecting plate and connecting block fixed connection, thereby the installation is firm, can install required extension apparatus in expansion seat department. After a period of use, however, the expansion device may need to be serviced and removed for maintenance. For example, when certain expansion equipment needs to be maintained, an operator loosens bolts at the first arc-shaped connecting plate and the second arc-shaped connecting plate, moves the equipment connecting unit upwards, and turns over the first arc-shaped sliding block, as shown in fig. 9, the first arc-shaped sliding block is positioned at the top end of the first circular ring part, and the reminding unit is placed in the mounting groove by the operator, at the moment, the mounting box is inserted into the light source through hole, and light of the light source is reflected back and forth in the lampshade, so that the whole lampshade is lightened. And the reminding unit can remotely communicate, has a positioning function and can write certain maintenance information. For example, an operator with a hand-held terminal can also communicate with the control center to write information into the reminding unit. Then (usually in several days), after the equipment maintenance is good, an operator arrives at the lamp pole (the maintenance is best at night, the traffic is prevented from being hindered, the GPS positioning and the light-emitting reminding of the lampshade can help the operator to quickly find the target lamp pole), the reminding unit is taken away, the equipment expanding unit is installed at the equipment connecting unit, and the equipment expanding unit is normally used. Because the reminding unit is arranged for reminding the position and necessary maintenance information needing to be shared in the maintenance process, an operator taking away the damaged expansion equipment and an operator installing new expansion equipment can realize quick and seamless work handover without the need of the same person or even face-to-face communication, and the operation is quicker and more efficient.

While the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.

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