阅读说明：本技术 一种新型电气工程线缆保护装置 (Novel electrical engineering cable protection device ) 是由 叶传龙 于 2021-08-25 设计创作，主要内容包括：本发明涉及电气工程技术领域,且公开了一种新型电气工程线缆保护装置,包括第一支撑板和第二支撑板,所述第一支撑板的底部固定安装有第一铰链,所述第一支撑板底部的左侧和第二支撑板顶部的左侧通过第一铰链转动连接,所述第二支撑板的底部固定连接有支撑柱。该新型电气工程线缆保护装置,达到了该新型电气工程线缆保护装置固定效果好的目的,解决了一般新型电气工程线缆保护装置的问题,无需传统装置繁琐安装方式的同时,解决了线缆晃动幅度大而导致线缆连接处脱落的问题,能够使线缆稳定的进行工作,抱紧层能够增加与线缆之间的摩擦力,防止线缆转动而导致线缆打结或是线缆脱落的问题发生,有效的解决使用过程中存在的安全隐患。(The invention relates to the technical field of electrical engineering, and discloses a novel electrical engineering cable protection device which comprises a first supporting plate and a second supporting plate, wherein a first hinge is fixedly installed at the bottom of the first supporting plate, the left side of the bottom of the first supporting plate is rotatably connected with the left side of the top of the second supporting plate through the first hinge, and a supporting column is fixedly connected with the bottom of the second supporting plate. This novel electrical engineering cable protection device, the fixed effectual purpose of this novel electrical engineering cable protection device has been reached, general novel electrical engineering cable protection device's problem has been solved, when need not the loaded down with trivial details mounting means of traditional device, it is big and lead to the problem that the cable junction drops to have solved the cable range of rocking, can make the stable work that carries on of cable, hold the layer tightly can increase and the cable between frictional force, prevent that the cable from rotating and lead to the cable to tie a knot or the problem that the cable drops takes place, the potential safety hazard that exists in the effectual solution use.)

1. The utility model provides a novel electrical engineering cable protection device, includes first backup pad (1) and second backup pad (2), its characterized in that: the bottom of the first supporting plate (1) is fixedly provided with a first hinge (3), the left side of the bottom of the first supporting plate (1) is rotatably connected with the left side of the top of the second supporting plate (2) through the first hinge (3), the bottom of the second supporting plate (2) is fixedly connected with a supporting column (9), one side of the supporting column (9) is provided with a stabilizing mechanism (34) fixedly installed at the bottom of the second supporting plate (2), the bottom of the first supporting plate (1) is provided with an upper installation groove (5), the inner top wall of the upper installation groove (5) is fixedly connected with a limiting sleeve (23), the inside of the limiting sleeve (23) is provided with a spring (25) fixedly connected with the inner top wall of the upper installation groove (5), one end of the spring (25) is fixedly connected with a connecting plate (24), the bottom of the connecting plate (24) is fixedly connected with a baffle plate (22), the bottom of the baffle (22) is fixedly connected with an orientation shaft (21), one end of the orientation shaft (21) is fixedly connected with an elastic sheet (18), and the bottom of the elastic sheet (18) is fixedly connected with a connecting rod (17);

the clamping device is characterized in that one end of the connecting rod (17) is fixedly connected with a second clamping claw (16), the top of the second supporting plate (2) is provided with a lower mounting groove (33), the inner bottom wall of the lower mounting groove (33) is fixedly connected with a bearing shaft (13), one end of the bearing shaft (13) is fixedly connected with a first clamping claw (15), the bottom of the first clamping claw (15) is provided with a reinforcing rod (14) fixedly connected with the outer wall of the bearing shaft (13), one end of the reinforcing rod (14) is fixedly connected with the inner wall of the lower mounting groove (33), the bottom of the second supporting plate (2) is movably connected with a supporting column (9), one end of the supporting column (9) is movably connected with a mounting cylinder (11), one end of the mounting cylinder (11) is fixedly connected with a supporting seat (12), and the top of the first supporting plate (1) is fixedly provided with a second hinge (4), first backup pad (1) has chucking plate (6) through second hinge (4) swing joint, one side fixedly connected with limiting plate (7) that second backup pad (2) are close to chucking plate (6), the top swing joint of limiting plate (7) has bolt (8).

2. The novel electrical engineering cable protection device of claim 1, characterized in that: holding tank (28) have been seted up to the bottom of second backup pad (2), the outer wall fixedly connected with round pin axle (29) of support column (9), support column (9) are connected with second backup pad (2) through round pin axle (29), and the inner wall of holding tank (28) is seted up and is all mated with each other with round pin axle (29) shape size rotation hole.

3. The novel electrical engineering cable protection device of claim 1, characterized in that: the outer wall of support column (9) is provided with external screw thread (10), the inner wall of installation section of thick bamboo (11) is provided with internal thread (30), external screw thread (10) all match each other with the shape size of internal thread (30), and support column (9) and installation section of thick bamboo (11) are connected with internal thread (30) through external screw thread (10).

4. The novel electrical engineering cable protection device of claim 1, characterized in that: the surface of the clamping plate (6) is provided with a registration groove (31), the shape and the size of the registration groove (31) are matched with those of the limiting plate (7), and the limiting plate (7) penetrates through the registration groove (31) to be connected with the plug pin (8).

5. The novel electrical engineering cable protection device of claim 1, characterized in that: the top of the limiting plate (7) is provided with a clamping hole (32), and the shape and the size of the clamping hole (32) are matched with those of the bolt (8).

6. The novel electrical engineering cable protection device of claim 1, characterized in that: the inner walls of the first clasping claw (15) and the second clasping claw (16) are fixedly connected with clasping layers (26), and the clasping layers (26) are rubber clasping layers.

7. The novel electrical engineering cable protection device of claim 1, characterized in that: one end of the orientation shaft (21) close to the elastic sheet (18) penetrates through the limiting sleeve (23) and extends to the outside of the limiting sleeve (23), and the diameter of the orientation shaft (21) is smaller than the inner diameter of the limiting sleeve (23).

8. The novel electrical engineering cable protection device of claim 1, characterized in that: mounting holes (27) are formed in the top of the supporting seat (12), the number of the mounting holes (27) is four, and the four mounting holes (27) are distributed on the top of the supporting seat (12) in an annular array at equal intervals.

9. The novel electrical engineering cable protection device of claim 1, characterized in that: the inner wall of the upper mounting groove (5) is fixedly connected with a fixing ring (20), the inner wall of the fixing ring (20) is movably connected with a connecting ring (19), and the outer wall of the connecting ring (19) is fixedly connected with the elastic sheet (18).

10. The novel electrical engineering cable protection device of claim 1, characterized in that: stabilizing mean (34) includes mounting panel (3401), the bottom swing joint of mounting panel (3401) has bolt (3402), mounting panel (3041) is connected with second backup pad (2) through bolt (3402), the bottom fixedly connected with of mounting panel (3401) hangs down rings (3403), the outer wall swing joint that hangs down rings (3403) has lantern ring (3404), the outer wall fixedly connected with lifting rope (3405) of lantern ring (3404), the one end fixedly connected with that mounting panel (3401) was kept away from in lifting rope (3405) bears ball (3407), the inside that bears ball (3407) is provided with gravity sand (3408), the inside that bears ball (3407) is provided with absorption liquid (3406).

Technical Field

The invention relates to the technical field of electrical engineering, in particular to a novel electrical engineering cable protection device.

Background

Electrical engineering is the core and key subject in modern science and technology, for example, it is the great progress of electronic technology that has pushed the arrival of information age based on computer network and will change the life and work mode of human beings, and the traditional electrical engineering is defined as the sum of related subjects for creating electric and electronic systems, and this definition has been very broad, but with the rapid development of scientific technology, the electrical engineering concept in the 21 st century has been far beyond the scope of the above definition, and the stanford university teaches that today's electrical engineering covers almost all electronic and photon related engineering behaviors.

The invention with the prior publication No. CN201810573923.4 in China is that' the bottom end of the support frame is provided with a plurality of symmetrically distributed support legs, the support frame comprises an upper support plate and a lower support plate, the left side of the bottom end of the upper support plate is rotationally connected with the right side of the top end of the lower support plate through a first hinge, the bottom end of the upper support plate is provided with a plurality of evenly distributed upper mounting grooves, the top end inside the upper mounting groove is provided with a first spring, the bottom end of the first spring is provided with an upper clamping block, the top end of the lower support plate is provided with a lower mounting groove corresponding to the upper mounting groove, the bottom end inside the lower mounting groove is provided with a second spring, the top end of the second spring is provided with a lower clamping block, the inner wall of the upper mounting groove is fixedly connected with the first spring, the inner wall of the lower mounting groove is fixedly connected with the second spring, the clamping blocks are connected through the springs, and the aim of fixing cables by utilizing the elasticity of the springs, simultaneously the spring can provide cushioning effect when the condition is rocked in the emergence, and the spring itself has elasticity and does not die the position complete fixation of cable when rocking in fact, can lead to the cable to rock, by a wide margin increased the swing range of cable, rocks the junction of cable easily and drops, has caused the potential safety hazard from the in-process to using, consequently needs improve.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a novel electric engineering cable protection device which has the advantages of good fixing effect and the like, and solves the problem of the general novel electric engineering cable protection device.

(II) technical scheme

In order to achieve the purpose of good fixing effect of the novel electric engineering cable protection device, the invention provides the following technical scheme: a novel electric engineering cable protection device comprises a first supporting plate and a second supporting plate, wherein a first hinge is fixedly installed at the bottom of the first supporting plate, the left side of the bottom of the first supporting plate is rotatably connected with the left side of the top of the second supporting plate through the first hinge, a supporting column is fixedly connected with the bottom of the second supporting plate, a stabilizing mechanism fixedly installed at the bottom of the second supporting plate is arranged on one side of the supporting column, an upper installation groove is formed in the bottom of the first supporting plate, a limiting sleeve is fixedly connected with the inner top wall of the upper installation groove, a spring fixedly connected with the inner top wall of the upper installation groove is arranged inside the limiting sleeve, a connecting plate is fixedly connected with one end of the spring, a baffle is fixedly connected with the bottom of the connecting plate, an orientation shaft is fixedly connected with the bottom of the baffle, and an elastic sheet is fixedly connected with one end of the orientation shaft, the bottom of the elastic sheet is fixedly connected with a connecting rod.

One end of the connecting rod is fixedly connected with a second holding claw, the top of the second supporting plate is provided with a lower mounting groove, the inner bottom wall of the lower mounting groove is fixedly connected with a bearing shaft, one end of the bearing shaft is fixedly connected with a first holding claw, the bottom of the first holding claw is provided with a reinforcing rod fixedly connected with the outer wall of the bearing shaft, one end of the reinforcing rod is fixedly connected with the inner wall of the lower mounting groove, the bottom of the second supporting plate is movably connected with a supporting column, one end of the supporting column is movably connected with an installation cylinder, one end of the mounting cylinder is fixedly connected with a supporting seat, the top of the first supporting plate is fixedly provided with a second hinge, the first supporting plate is movably connected with a clamping plate through a second hinge, one side of the second supporting plate, which is close to the clamping plate, is fixedly connected with a limiting plate, and the top of the limiting plate is movably connected with a bolt.

Preferably, the holding tank has been seted up to the bottom of second backup pad, the outer wall fixedly connected with round pin axle of support column, the support column is connected with the second backup pad through the round pin axle, and the inner wall of holding tank set up with the equal rotation hole that matches each other of round pin axle shape size, with the support column through the round pin axle setting in the inside of holding tank, can be quick accomodate the support column and get into the holding tank, the person of facilitating the use carries.

Preferably, the outer wall of support column is provided with the external screw thread, the inner wall of an installation section of thick bamboo is provided with the internal thread, the external screw thread all matches with the internal screw thread shape size each other, and support column and an installation section of thick bamboo pass through external screw thread and female connection, can be quick carry out the dismouting with an installation section of thick bamboo through the screw thread that sets up, can adjust the distance of an installation section of thick bamboo and installation face to the condition of difference simultaneously.

Preferably, the surface of the clamping plate is provided with an alignment groove, the shape and size of the alignment groove are matched with those of the limiting plate, and the limiting plate penetrates through the alignment groove and is connected with the bolt.

Preferably, the top of the limiting plate is provided with a clamping hole, and the shape and size of the clamping hole are matched with the shape and size of the bolt.

Preferably, the layer is embraced to the equal fixedly connected with of inner wall that first claw and the second were embraced tightly claw, and is embraced tightly the layer for the rubber and hug tightly the layer, the surface of rubber comparatively roughly can increase and the cable between the frictional force, prevent that the cable from removing.

Preferably, one end of the orientation shaft close to the elastic sheet penetrates through the limiting sleeve and extends to the outside of the limiting sleeve, and the diameter of the orientation shaft is smaller than the inner diameter of the limiting sleeve.

Preferably, the top of supporting seat has seted up the mounting hole, and the quantity of mounting hole is four, and four mounting holes are the annular array equidistance and distribute at the top of supporting seat.

Preferably, the inner wall of the upper mounting groove is fixedly connected with a fixing ring, the inner wall of the fixing ring is movably connected with a connecting ring, and the outer wall of the connecting ring is fixedly connected with the elastic sheet.

Preferably, stabilizing mean includes the mounting panel, the bottom swing joint of mounting panel has the bolt, the mounting panel passes through the bolt and is connected with the second backup pad, the bottom fixedly connected with of mounting panel hangs down rings, the outer wall swing joint who hangs down rings has the lantern ring, the outer wall fixedly connected with lifting rope of the lantern ring, the one end fixedly connected with that the mounting panel was kept away from to the lifting rope bears the weight of the ball, the inside that bears the weight of the ball is provided with gravity sand, the inside that bears the weight of the ball is provided with the absorption liquid.

(III) advantageous effects

Compared with the prior art, the invention provides a novel electrical engineering cable protection device, which has the following beneficial effects:

1. the novel electric engineering cable protection device achieves the purpose of good fixing effect of the novel electric engineering cable protection device through the mutual matching use of the bearing shaft, the reinforcing rod, the first enclasping claw, the second enclasping claw, the connecting rod, the elastic sheet, the connecting ring, the fixing ring, the directional shaft, the baffle, the limiting sleeve, the connecting plate, the spring and the enclasping layer, solves the problem of the common novel electric engineering cable protection device, the first supporting plate and the second supporting plate are opened, the cable is placed at the top of the first enclasping claw, the first supporting plate and the second supporting plate are closed, the elastic sheet has weaker elasticity relative to the spring, the first enclasping claw and the second enclasping claw can effectively enclasping the cable, meanwhile, the extending length of the spring is reduced, when the cable shakes, the first enclasping claw and the second enclasping claw can effectively limit the shake of the cable, and when the shake happens, the slight swing of spring can absorb the strength and will rock the elimination, when need not the loaded down with trivial details mounting means of traditional device, has solved the cable and has rocked the range big and lead to the problem that the cable junction drops, can make the stable work that carries on of cable, hold the layer tightly can increase and the cable between frictional force, prevent that the cable from rotating and lead to the cable to tie a knot or the problem that the cable drops takes place, has solved the problem among the above-mentioned technical defect, the potential safety hazard that exists in the effectual solution use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure of FIG. 1 according to the invention at location A;

FIG. 3 is a schematic view of the mounting hole structure of the present invention;

FIG. 4 is a bottom view of a second supporting plate according to the present invention;

FIG. 5 is a schematic view of the mounting barrel of the present invention;

FIG. 6 is a schematic view of the alignment groove structure of the present invention;

FIG. 7 is a schematic view of a chucking hole of the present invention;

fig. 8 is a schematic structural view of the stabilizing mechanism of the present invention.

In the figure: 1. a first support plate; 2. a second support plate; 3. a first hinge; 4. a second hinge; 5. mounting a mounting groove; 6. a chucking plate; 7. a limiting plate; 8. a bolt; 9. a support pillar; 10. an external thread; 11. mounting the cylinder; 12. a supporting seat; 13. a load bearing shaft; 14. a reinforcing bar; 15. a first clasping claw; 16. a second clasping claw; 17. a connecting rod; 18. a spring plate; 19. a connecting ring; 20. a fixing ring; 21. an orientation axis; 22. a baffle plate; 23. a limiting sleeve; 24. a connecting plate; 25. a spring; 26. a holding layer; 27. mounting holes; 28. accommodating grooves; 29. a pin shaft; 30. an internal thread; 31. a positioning groove; 32. a clamping hole; 33. a lower mounting groove; 34. a stabilizing mechanism; 3401. mounting a plate; 3402. a bolt; 3403. a hanging ring; 3404. a collar; 3405. a lifting rope; 3406. an absorption liquid; 3407. a bearing ball; 3408. gravity sand.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a novel electrical engineering cable protection device comprises a first support plate 1 and a second support plate 2, wherein a first hinge 3 is fixedly installed at the bottom of the first support plate 1, the left side of the bottom of the first support plate 1 is rotatably connected with the left side of the top of the second support plate 2 through the first hinge 3, a support pillar 9 is fixedly connected with the bottom of the second support plate 2, a stabilizing mechanism 34 fixedly installed at the bottom of the second support plate 2 is arranged at one side of the support pillar 9, an upper installation groove 5 is formed at the bottom of the first support plate 1, a limit sleeve 23 is fixedly connected with the inner top wall of the upper installation groove 5, a spring 25 fixedly connected with the inner top wall of the upper installation groove 5 is arranged inside the limit sleeve 23, the extension length of the spring 25 is reduced, when shaking occurs, the first holding claw 15 and the second holding claw 16 can effectively limit shaking of the cable, when taking place slight rocking simultaneously, the slight swing of spring 25 can absorb the strength and will rock the elimination, when need not the loaded down with trivial details mounting means of traditional device, the problem that the cable amplitude of rocking is big and lead to the cable junction to drop has been solved, can make the stable work that carries on of cable, the one end fixedly connected with connecting plate 24 of spring 25, the bottom fixedly connected with baffle 22 of connecting plate 24, the directional axle 21 of bottom fixedly connected with of baffle 22, the one end fixedly connected with shell fragment 18 of directional axle 21, after first backup pad 1 and second backup pad 2 are opened, put the cable at the top of first claw 15 of holding tightly, closed first backup pad 1 and second backup pad 2, the elasticity of shell fragment 18 relative spring 25 is relatively weak, can effectually make first claw 15 of holding tightly and second claw 16 hold the cable tightly, the bottom fixedly connected with connecting rod 17 of shell fragment 18.

Claw 16 is embraced to the one end fixedly connected with second of connecting rod 17, mounting groove 33 has been seted up down at the top of second backup pad 2, the interior diapire fixedly connected with bearing axle 13 of lower mounting groove 33, the first claw 15 of embracing tightly of one end fixedly connected with of bearing axle 13, the bottom of first claw 15 of embracing tightly is provided with stiffener 14 of fixed connection at the bearing axle 13 outer wall, the one end of stiffener 14 and the inner wall fixed connection of lower mounting groove 33, the bottom swing joint of second backup pad 2 has support column 9, the one end swing joint of support column 9 has an installation section of thick bamboo 11, the one end fixedly connected with supporting seat 12 of an installation section of thick bamboo 11, the top fixed mounting of first backup pad 1 has second hinge 4, first backup pad 1 has chucking plate 6 through second hinge 4 swing joint, second backup pad 2 is close to one side fixedly connected with limiting plate 7 of chucking plate 6, the top swing joint of limiting plate 7 has bolt 8.

Holding tank 28 has been seted up to the bottom of second backup pad 2, and the outer wall fixedly connected with round pin axle 29 of support column 9, support column 9 are connected with second backup pad 2 through round pin axle 29, and the inner wall of holding tank 28 is seted up and is all mutually matchd with round pin axle 29 shape size rotation hole.

The outer wall of support column 9 is provided with external screw thread 10, and the inner wall of installation section of thick bamboo 11 is provided with internal thread 30, and external screw thread 10 all matches each other with internal thread 30's shape size, and support column 9 and installation section of thick bamboo 11 pass through external screw thread 10 and internal thread 30 are connected.

The counterpoint groove 31 has been seted up on the surface of chucking plate 6, and the shape size of counterpoint groove 31 all matches each other with the shape size of limiting plate 7, and limiting plate 7 passes counterpoint groove 31 and is connected with bolt 8, and the effectual position that has restricted chucking plate 6 prevents chucking plate 6 and breaks away from and the cable disengaging device that leads to.

The top of the limiting plate 7 is provided with a clamping hole 32, and the shape and size of the clamping hole 32 are matched with the shape and size of the bolt 8.

The layer 26 is embraced to the equal fixedly connected with of inner wall that first claw 15 and the second were embraced tightly claw 16, and embraces the layer 26 and embrace tightly for rubber, embrace layer 26 tightly can increase and the cable between frictional force, prevent that the cable from rotating and lead to the cable to tie a knot or the problem that the cable drops takes place, has solved the problem among the above-mentioned technical defect, the potential safety hazard that exists in the effectual solution use.

One end of the orientation shaft 21 close to the elastic sheet 18 penetrates through the limiting sleeve 23 and extends to the outside of the limiting sleeve 23, and the diameter of the orientation shaft 21 is smaller than the inner diameter of the limiting sleeve 23.

The top of supporting seat 12 has been seted up mounting hole 27, and the quantity of mounting hole 27 is four, and four mounting holes 27 are the annular array equidistance and distribute at the top of supporting seat 12.

The inner wall of the upper mounting groove 5 is fixedly connected with a fixing ring 20, the inner wall of the fixing ring 20 is movably connected with a connecting ring 19, and the outer wall of the connecting ring 19 is fixedly connected with the elastic sheet 18.

The stabilizing mechanism 34 comprises a mounting plate 3401, a bolt 3402 is movably connected to the bottom of the mounting plate 3401, the mounting plate 3401 is connected with the second support plate 2 through the bolt 3402, a hanging ring 3403 is fixedly connected to the bottom of the mounting plate 3401, a lantern ring 3404 is movably connected to the outer wall of the hanging ring 3403, through the mutual matching of the hanging ring 3403 and the lantern ring 3404, the bearing ball 3407 can be kept vertical to the horizontal plane all the time through the self gravity, the outer wall of the lantern ring 3404 is fixedly connected with a lifting rope 3405, one end of the lifting rope 3405, which is far away from the mounting plate 3401, is fixedly connected with the bearing ball 3407, gravity sand 3408 is arranged inside the bearing ball 3407, absorption liquid 3406 is arranged inside the bearing ball 3407, the bearing ball 3407 and the gravity sand 3408 can increase the weight of the whole device, meanwhile, the center of the device is moved downwards, so that the shaking of the device is reduced, and meanwhile, the absorption liquid 3406 can effectively absorb the shaking, so that the influence of the shaking on the cable is reduced.

When the cable clamping device is used, the supporting column 9 is buckled out of the accommodating groove 28 through rotation of the pin shaft 29, the supporting seat 12 is screwed and installed at one end of the supporting column 9, the supporting seat 12 is installed on the installation surface through the installation hole 27, the pin 8 is pulled out of the clamping hole 32 in the limiting plate 7, the clamping plate 6 is buckled down, the clamping plate 6 is separated from the supporting plate, the first supporting plate 1 is lifted upwards, a cable is placed on the top of the first clamping claw 15, the first supporting plate 1 is closed, the second clamping claw 16 is in contact with and clamps the cable, the elastic sheet 18 is slightly jacked upwards and tightened, the spring 25 applies pressure to the directional shaft 21, the second clamping claw 16 can clamp the cable through elastic action of the elastic sheet 18 and the spring 25, and then the pressure of the first clamping claw 15 to the cable is increased through relative acting force, namely the cable can be in a fixed position state.

To sum up, this novel electrical engineering cable protection device has reached the fixed effectual purpose of this novel electrical engineering cable protection device, has solved general novel electrical engineering cable protection device's problem, the potential safety hazard that exists in the effectual solution use.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.