Claims:WE CLAIM
1. An arrangement (100) of fixtures to support a plurality of machining tools on a slotting machine for machining low diameter shafts on a rotor (104), the arrangement comprising of:
a first fixture (101) for supporting the rotor (104);
a second fixture (102) located at a distance from the first fixture (102) and the rotor (104) for giving rigidity to the arrangement during the machining operation;
a plurality of third fixtures (103) acting as a rest to protect surface of the rotor (104) against rubbing;
wherein the first fixture (101) and the second fixture (102) are positioned between the third fixtures (103),
wherein an adaptor (201) is mounted on the front end of the rotor (104) for supporting the rotor (104) on a chuck.
2. The arrangement (100) as claimed in claim 1, wherein the plurality of machining tools include a milling cutter (600) and a dovetail cutter (700).
3. The arrangement (100) as claimed in claims 1-2, wherein the first fixture (101) supports the rotor (104) and accommodates for the milling cutter (600) and the dovetail cutter (700) and wherein an asymmetric angular segment of the first fixture (101) is between 110o to 130o of sector angle.
4. The arrangement (100) as claimed in claims 1-3, wherein a plurality of holes (301) are provided at various pitch circle diameter of the first fixture (101) for dampening dynamics effects during machining.
5. The arrangement (100) as claimed in claims 1-4, wherein the second fixture (102) supports a rotor step (105) and accommodates for the milling cutter (600) and the dovetail cutter (700) and wherein the asymmetric angular segment of the second fixture (102) is between 110o to 130o of sector angle.
6. The arrangement (100) as claimed in claims 1-5, wherein a plurality of holes (401) are provided at various pitch circle diameter of the second fixture (102) for dampening dynamics effects during machining.
7. The arrangement (100) as claimed in claims 1-6, wherein the symmetric angular segment of the plurality of third fixtures (103) is approximately 100o of sector angle with a sufficient width.
8. The arrangement (100) as claimed in claims 1-7, wherein a plurality of axial holes (502) and a plurality of radial holes (504) are interconnected to each other in the third fixtures (103) and converge towards an oil pocket at the inner diameter of the third fixtures wherein pressurized oil is pumped in to the oil pocket to protect the rubbing of the rotor (104) surface.
9. The arrangement (100) as claimed in claims 1-8, wherein a plurality of first lifting holes (302) and a locking arrangement is provided at the outer diameter of the first fixture (101), a plurality of second lifting holes (402) and a locking arrangement is present at the outer diameter of the second fixture (102) and a plurality of third lifting holes (502) and a locking arrangement is placed at the outer diameter of the third fixtures (103) for mounting and fixing each of the fixtures (102, 102, 103) on the slotting machine.
, Description: AN ARRANGEMENT OF FIXTURES TO SUPPORT MACHINING TOOLS

FIELD OF THE INVENTION
[0001] The present subject matter described herein relates to an arrangement of fixtures for supporting machining tools. More specifically, the present invention relates to an arrangement of fixtures for supporting multiple machining tools on a slotting machine that can be used for machining slots and dovetail grooves on the low diameter shafts on a rotor.

BACKGROUND OF THE INVENTION
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Turbo-generator rotors hold the rotor winding via rotor copper, insulation, wedges, retaining ring, hubs and excitation leads intact. Turbo-generator rotors rotate at high rpm to the tune of 3000 rpm for 2-pole machines. Structural rigidity and stiffness of rotor is an important criteria to be considered for reliable operation of the turbo-generator. A good accuracy is also needed for machining operations of such rotors due to the reason that centrifugal forces and dynamic loads act on rotor during the operation of turbo-generator. The effect can directly be seen on the vibrations induced during running of the turbo-generator.
[0004] Another important factor to be considered it the cost of high precision slotting and dovetail milling machinery. The numerical control machinery (CNC) are sophisticated in nature with high degree of automation inbuilt in them and due to the high degree of accuracy, great reliability in handling of complex, critical geometries, such machinery is very expensive.
[0005] Another limitation is that, CNC machinery cannot cater to full range of rotor diameters. Limitation is imposed by the specifications of machines in-terms work-piece geometries and are linked with machinery parameters like centre height, swing over bed, swing over saddle and work piece weights that is to be handled.
[0006] Referring to prior art EP0486131B1, it relates to machining of a gas turbine engine rotor without removing the rotor from the engine and more particularly, to a fixture and a method for machining a damper pocket in a high pressure compressor disk of an aircraft gas turbine engine rotor mounted in the engine. The fixture used in this inventions has a guide slot. Material is removed by guiding an operating machining tool disposed through a guide slot in the fixture.
[0007] The problem with the above state of art is that the fixture used cannot adapt to machining the rotor having a lower diameter or lower length.
[0008] Further, the machinery used for rotor slotting and dovetail milling works in a specialized nature and are very costly. Moreover, these machinery have a restriction and that is it’s applicability is limited to the range of rotor diameter and its length. Multiple machinery needs to be purchased for different range of rotor lengths and diameter.
[0009] It is therby required to develop an arrangement of fixtures that makes the existing machinery compatible to machine small diameter rotor and lesser length rotors. Hence, the present invention has been introduced.
OBJECTS OF THE DISCLOSURE
[0010] It is therefore the object of the present disclosure to overcome the aforementioned and other drawbacks in prior arts.
[0011] It is a primary object of the present disclosure to machine lower diameter rotors with the help of fixtures that are adapted according to the machining requirements.
[0012] It is another object of the present disclosure to further extend the length of rotor for better precision at the time of machining for rotor slotting and dovetail milling.
[0013] It is yet another object of the present disclosure to provide an arrangement that requires minor investment and very less time for adaptation works.
[0014] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
[0015] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.
SUMMARY OF THE INVENTION
[0016] One or more drawbacks of conventional systems and process are overcome, and additional advantages are provided through the apparatus/composition and a method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be part of the claimed disclosure.
[0017] Solution to one or more drawbacks of existing technology and additional advantages are provided through the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be a part of the claimed disclosure.
[0018] The present disclosure offers a solution in the form of an arrangement of fixtures to support a plurality of machining tools on a slotting machine for machining low diameter shafts on a rotor, including a first fixture for supporting the rotor, a second fixture located at a distance from the first fixture and the rotor for giving rigidity to the arrangement during the machining operation, a plurality of third fixtures acting as a rest to protect surface of the rotor against rubbing, wherein the first fixture and the second fixture are positioned between the third fixture, wherein an adaptor is mounted on the front end of the rotor for supporting the rotor on a chuck.
[0019] In an aspect of the invention, the plurality of machining tools include a milling cutter and a dovetail cutter.
[0020] In an aspect of the invention, the first fixture supports the rotor and accommodates for the milling cutter and the dovetail cutter and wherein an asymmetric angular segment of the first fixture is between 110o to 130o of sector angle.
[0021] In an aspect of the invention, a plurality of holes are provided at various pitch circle diameter of the first fixture for dampening dynamics effects during machining.
[0022] In an aspect of the invention, the second fixture supports a rotor step and accommodates for the milling cutter and the dovetail cutter and wherein the asymmetric angular segment of the second fixture is between 110o to 130o of sector angle.
[0023] In an aspect of the invention, a plurality of holes are present at various pitch circle diameter of the second fixture for dampening any dynamics effects during machining.
[0024] In an aspect of the invention, the symmetric angular segment of the plurality of third fixtures is approximately 100o of sector angle with a sufficient width.
[0025] In an aspect of the invention, a plurality of an axial and a plurality of radial holes are interconnected to each other in the third fixtures and converge towards an oil pocket at the inner diameter of the third fixtures wherein pressurized oil is pumped in to the oil pocket to protect the rubbing of rotor surfaces.
[0026] In an aspect of the invention, a plurality of first lifting holes and a locking arrangement is provided at the outer diameter of the first fixture, a plurality of second lifting holes and a locking arrangement is present at the outer diameter of the second fixture and a plurality of third lifting holes and a locking arrangement is placed at the outer diameter of the third fixtures for mounting and fixing each of the fixtures on the machine.
[0027] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
[0028] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
[0029] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.
[0030] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0031] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and processes that are consistent with the subject matter as claimed herein, wherein:-
[0032] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the present disclosure may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0033] Fig. 1 illustrates the isometric view of disposition arrangement of rotor on the machinery using fixtures according to the present disclosure;
[0034] Fig. 2 illustrates the disposition arrangement of rotor on the machinery using fixtures according to the present disclosure;
[0035] Fig. 3(a), 3(b), 3(c) illustrates the multiple views of the first fixture according to the present disclosure;
[0036] Fig. 4(a), 4(b), 4(c) illustrates the multiple views of the second fixture according to the present disclosure;
[0037] Fig. 5(a) illustrates radial holes of the third fixtures according to the present disclosure;
[0038] Fig. 5(b) illustrates axial holes of the third fixtures according to the present disclosure;
[0039] Fig. 5(c) illustrates oil pockets on the third fixtures according to the present disclosure;
[0040] Fig. 6 illustrates the milling cutter used in accordance with the present disclosure;
[0041] Fig. 7 illustrates the dovetail cutter as used in the present disclosure.
[0042] The figures depict embodiments of the present subject matter for illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
[0043] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAIL DESCRIPTION OF INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS OF THE PREFERRED EMBODIMENTS:
[0044] While the embodiments of the disclosure are subject to various modifications and alternative forms, a specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.
[0045] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.
[0046] The invention is related to an arrangement for supporting a high precision slotting machine that is used for machining slots and dovetail grooves on a rotor of a turbo generator. The arrangement includes multiple fixtures that are designed for mounting and supporting compact diameter rotor on them and also for accommodating a milling cutter and a dovetail cutter.
[0047] Referring to Fig. 1, the arrangement (100) in axial disposition of the fixtures for adapting the machining tools to machine low diameter shafts of a turbo generator is illustrated. The arrangement of the fixtures includes a first fixture (101), a second fixture (102) and a plurality of third fixtures (103).
[0048] The first fixture (101) is a rotor (104) support fixture and is placed below the rotor (104). The second fixture (102) is an intermediate support fixture and is placed suitably at rotor step (105) for giving proper rigidity to the arrangement (100). The length of the rotor (104) is increased to accomodate small rotor on big machine for proper clamping and precision machining. The plurality of third fixtures (103) are journal support fixtures that are placed at both ends of the slotting machine and act as a hydro-static steady rest.
[0049] The first fixture (101) and the second fixture (102) are located in between the third fixtures (103). Each fixture is located at a predetermined distance from each other to provide support at the time of performing the machining operation.
[0050] Referring to Fig. 2, an adapter (201) is shrink fitted on the rotor (104) at a front end for mounting the rotor (104) on chuck of the slotting machine with a desired closing force for reducing the axial and radial displacements of the shaft of the rotor (104) during the machining operation.
[0051] Referring to Fig. 3(a), 3(b), 3(c), the first fixture (101) is disclosed. The first fixture (101) supports the barrel of the rotor (104) and houses the milling cutter (600) and the dovetail cutter (700). The first fixture (101) has an asymmetric angular segment design with a definite thickness, where its thickness increases from top to bottom of the crossection area. Thereby, the first fixture (101) accommodates the rotor (104) at the inner diameter. The asymmetric angular segment design of the first fixture (101) is between 110o to 130o of the included sector angle. The sector is decided based on the arrangement of weight optimizing of the first fixture (101) by adding the holes (301).
[0052] Referring to Fig. 4(a), 4(b), 4(c), the second fixture (102) is disclosed. The second fixture (102) provides the intermediate support and is located at a distance from the first fixture (101) and the rotor (104) and is placed between the first fixture (101) and one of the third fixture. The second fixture supports the rotor step (105) and houses the milling cutter (600) and the dovetail cutter (700).
[0053] The second fixture (102) has an asymmetric angular segment design with a definite thickness, where its thickness also increases from top to bottom throughout the crossection area. Thereby, the first fixture (101) accommodates the rotor step (105) at the inner diameter. Similarly to the first fixture (101), the asymmetric angular segment design of the second fixture (102) is between 110o to 130o of the included sector angle. The sector is decided based on the arrangement of material including the holes (401).
[0054] The difference in the first fixture (101) and the second fixture (102) is that the inner diameter of both the fixtures have different crossesectional area to accommodate the respective parts of the rotor (104).
[0055] A plurality of holes (301, 401) are drilled though the first fixture (101) and the second fixture (102) axially along the length to optimize the weight and thereby reducing the overall loading on the machinery bed. The holes (302, 402) also damp some of the vibrations caused by dynamic loads acting during machining operation.
[0056] Referring to Fig. 5(a), 5(b), 5(c), the plurality of third fixtures (103) are disclosed. The plurality of third fixtures (103) are journal support fixtures that also have a definite thickness, where its the thickness also increases from top to bottom throughout the crossection area. The plurality of third fixtures (103) also have a symmetric angular segment of around 100o of sector angle and have a sufficient width.
[0057] The plurality of third fixtures (103) has multiple axial holes (501) on section A-A and multiple radial holes (502) on section B-B that are interconnected to each other and converge towards the oil pockets (503) located at the inner diameter of the plurality of third fixtures (103). The third fixtures (103) are designed in a way that lubrication is provided at the interface of the rotor (104) and the plurality of third fixtures (103) for protecting the rubbing of the rotor (104) at the contact.
[0058] The pressurized oil is pumped into the oil pockets (503) that helps the plurality of third fixtures (103) to act as a hydro-static steady rest and subsequently protects the rubbing of the rotor (104) surface.
[0059] Furthermore, a plurality of first lifting holes (302) and a locking arrangement is provided at the outer diameter of the first fixture (101), a plurality of second lifting holes (402) and a locking arrangement is provided at the outer diameter of the second fixture (102) and a plurality of third lifting holes (502) and a locking arrangement is provided at the outer diameter of the third fixtures (103) for mounting and fixing the fixtures on the machine before commencing the machining operation.
[0060] The plurality of machining tools used in the arrangement for performing the machining operation are the milling cutter (600) and the dovetail cutter (700).
TECHNICAL ADVANTAGES
[0061] With the help of the solution as proposed herein in the context of the present disclosure, defect free joint is obtained using the present method.
[0062] The present disclosure also provides that the present arrangement is compatible in adapting the existing machinery to machine small diameter rotor and lesser length rotors.
[0063] The present disclosure further provides that the erection and commissioning time is saved due to the adaptation of existing machinery.
[0064] The invention is cost effective.
[0065] Lastly, there is an optimisation of space utilization in the manufacturing plant as single machine is used in the place of multiple machines.
[0066] WORKING OF INVENTION
How the arrangement (100) of fixtures of the present invention works practically is essentially reuired to be mentioned under section 10(4) of the Patents (Amendment) Act,2005.
[0067] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation, no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to disclosures containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. Also, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general, such construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to “at least one of A, B, or C, etc.” is used, in general, such construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
[0068] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present disclosure contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the disclosure, and other dimensions or geometries are possible. Also, while a feature of the present disclosure may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present disclosure. The present disclosure also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.
[0069] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0070] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
[0071] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particulars claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogues to “at least one of A, B and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B”.
[0072] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.
[0073] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.
[0074] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.
[0075] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.