U.S. patent application number 14/327952 was filed with the patent office on 2016-01-14 for enclosed media device with improved heat transfer capabilities.
The applicant listed for this patent is Peerless Industries, Inc.. Invention is credited to Michael A. Campagna, Justin Myers, Steven Sagerian.
Application Number | 20160014910 14/327952 |
Document ID | / |
Family ID | 54105596 |
Filed Date | 2016-01-14 |
United States Patent
Application |
20160014910 |
Kind Code |
A1 |
Campagna; Michael A. ; et
al. |
January 14, 2016 |
ENCLOSED MEDIA DEVICE WITH IMPROVED HEAT TRANSFER CAPABILITIES
Abstract
A media device enclosure includes a housing with an interior
sized and configured to receive a media device therein, a front
opening, and a back opening. The media device enclosure further
includes a front cover coupled to the housing and configured to
cover the front opening and a back cover coupled to the housing and
configured to cover the back opening. The media device enclosure
further includes a vent plug configured to allow the ingress and
egress of air and resistant to liquid ingress, and a check valve
configured to allow egress of air. The housing, the front cover,
and the back cover form a substantially sealed structure that is
resistant to the ingress of liquid or air into the interior.
Inventors: |
Campagna; Michael A.;
(Plainfield, IL) ; Myers; Justin; (Plainfield,
IL) ; Sagerian; Steven; (Plainfield, IL) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Peerless Industries, Inc. |
Aurora |
IL |
US |
|
|
Family ID: |
54105596 |
Appl. No.: |
14/327952 |
Filed: |
July 10, 2014 |
Current U.S.
Class: |
361/679.01 ;
220/4.02 |
Current CPC
Class: |
H04N 5/64 20130101; H05K
5/0017 20130101; H05K 5/0013 20130101; H05K 5/03 20130101; H05K
5/0213 20130101; B65D 81/02 20130101; H05K 5/06 20130101; H05K
7/20136 20130101 |
International
Class: |
H05K 5/00 20060101
H05K005/00; H05K 5/06 20060101 H05K005/06; H05K 5/02 20060101
H05K005/02; B65D 81/02 20060101 B65D081/02 |
Claims
1. A media device enclosure comprising: a housing defining: an
interior sized and configured to receive a media device therein; a
front opening; and a back opening; a front cover coupled to the
housing and configured to cover the front opening; a back cover
coupled to the housing and configured to cover the back opening; at
least one vent plug operatively connected to the back cover and
configured to allow the ingress and egress of air, the at least one
vent plug and resistant to liquid ingress; and at least one check
valve operatively connected to the back cover and configured to
allow egress of air from the media device enclosure; wherein the
housing, front cover, and the back cover form a substantially
sealed structure that is resistant to the ingress of liquid or air
into the interior.
2. The media device enclosure of claim 1, further comprising a
sealing member provided at an interface between housing and the
back cover such that an interface between the housing and the back
cover is substantially sealed and resistant to liquid ingress.
3. The media device enclosure of claim 1, wherein the interior is
sized to receive a flat panel display device.
4. The media device enclosure of claim 1, wherein the media device
enclosure has an ingress protection modified rating of IP65.
5. The media device enclosure of claim 1, wherein the at least one
vent plug and the at least one check valve are received in openings
defined in the back cover.
6. The media device enclosure of claim 5, wherein the at least one
vent plug and the at least one check valve are provided on opposite
sides of the back cover.
7. The media device enclosure of claim 1, further comprising a
blower configured to create an airflow through the interior between
the at least one vent plug and the at least one check valve.
8. An enclosed media device system comprising: a media device; a
housing defining: an interior sized and configured to receive the
media device therein; a front opening; and a back opening; a front
cover coupled to the housing and configured to cover the front
opening; a back cover coupled to the housing and configured to
cover the back opening; at least one vent plug operatively
connected to the back cover and configured to allow the ingress and
egress of air, the at least one vent plug and resistant to liquid
ingress; and at least one check valve operatively connected to the
back cover and configured to allow egress of air from the media
device enclosure; wherein the housing, front cover, and the back
cover form a substantially sealed structure that is resistant to
the ingress or liquid of air into the interior.
9. The enclosed media device system of claim 8, further comprising
a sealing member provided at an interface between housing and the
back cover such that an interface between the housing and the back
cover is substantially sealed and resistant to liquid ingress.
10. The enclosed media device system of claim 8, wherein the media
device is a flat panel display device.
11. The enclosed media device system of claim 8, wherein the
enclosed media device system has an ingress protection modified
rating of IP65.
12. The enclosed media device system of claim 8, wherein the at
least one vent plug and the at least one check valve are received
in openings defined in the back cover.
13. The enclosed media device system of claim 12, wherein the at
least one vent plug and the at least one check valve are positioned
such that airflow between the at least one vent plug and the at
least one check valve passes over the media device.
14. The enclosed media device system of claim 13, wherein the at
least one vent plug is provided on an upper half of the back cover
and the at least one check valve is provided on a lower half of the
back cover.
15. The media device enclosure of claim 8, further comprising a
blower configured to create an airflow through the interior between
the at least one vent plug and the at least one check valve.
Description
BACKGROUND OF THE INVENTION
[0001] This section is intended to provide a background or context
to the invention that is recited in the claims. The description
herein may include concepts that could be pursued, but are not
necessarily ones that have been previously conceived or pursued.
Therefore, unless otherwise indicated herein, what is described in
this section is not prior art to the description and claims in this
application and is not admitted to be prior art by inclusion in
this section.
[0002] In recent years, flat panel televisions have become
enormously popular in both commercial and residential sectors. As
the prices for plasma, liquid crystal display (LCD) and
light-emitting diode (LED) flat panel displays have continued to
fall, and the quality for the same devices have improved, more and
more businesses and individuals have purchased such devices for
both home and business purposes.
[0003] The advantages of flat panel displays has also led to
expanded application and placement of display devices, including
locating display devices in new and challenging and environments.
For example, display devices might be located outdoors in various
residential and commercial settings for entertainment or marketing
purposes, potentially exposing the display device to damaging rain,
snow, debris, and other elements. Display devices might also be
located in indoor environments such as restrooms, kitchens, and
industrial settings for various entertainment, marketing, and
informational purposes. It is desirable to protect the display
device, which is often quite expensive, from exposure to
environmental and other potential contaminants or from tampering.
Accordingly, various, sometimes bulky, environmental enclosures
have been developed that are intended to protect a display device
from the elements and other containments to permit locating such
displays outdoors and in other potentially inhospitable
environments. The display devices may operate for extended periods
and may generate substantial waste heat. Similarly, in an outdoor
environment with hot temperatures, the interior temperature within
the enclosure may be similarly hot. Effectively venting the
interior of the enclosure can improve the performance of the
display device by removing excess heat, which may affect the
operation of the display device (e.g., overheating electronics
components within the electronic device, etc.).
SUMMARY
[0004] A media device enclosure, and particularly a television
enclosure, includes a housing with an interior sized and configured
to receive a media device therein, a front opening, and a back
opening. The media device enclosure further includes a front cover
coupled to the housing and configured to cover the front opening
and a back cover coupled to the housing and configured to cover the
back opening. The media device enclosure further includes a vent
plug configured to allow the ingress and egress of air and
resistant to liquid ingress, and a check valve configured to allow
egress of air. The housing, the front cover, and the access cover
form a substantially sealed structure that is resistant to the
ingress of liquid or air into the interior.
[0005] Another embodiment relates to an enclosed media device
system. The enclosed media device system includes a media device,
and a housing defining an interior sized and configured to receive
the media device therein, a front opening, and a back opening. The
enclosed media device system further includes a front cover coupled
to the housing and configured to cover the front opening and a back
cover coupled to the housing and configured to cover the back
opening. The enclosed media device system further includes at least
one vent plug operatively connected to the back cover and
configured to allow the ingress and egress of air, the at least one
vent plug and resistant to liquid ingress, and at least one check
valve operatively connected to the back cover and configured to
allow egress of air from the media device enclosure. The housing,
the front cover, and the back cover form a substantially sealed
structure that is resistant to the ingress of liquid or air into
the interior.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a front perspective view of a display device
enclosure, according to an exemplary embodiment.
[0007] FIG. 2 is a rear perspective view of the display device
enclosure of FIG. 1.
[0008] FIG. 3 is a front view of the display device enclosure of
FIG. 1.
[0009] FIG. 4 is a top view of the display device enclosure of FIG.
1.
[0010] FIG. 5 is a right side view of the display device enclosure
of FIG. 1.
DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS
[0011] In the following detailed description, reference is made to
the accompanying drawings, which form a part hereof. In the
drawings, similar symbols typically identify similar components,
unless context dictates otherwise. The illustrative embodiments
described in the detailed description, drawings, and claims are not
meant to be limiting. Other embodiments may be utilized, and other
changes may be made, without departing from the spirit or scope of
the subject matter presented here. It will be readily understood
that the aspects of the present disclosure, as generally described
herein, and illustrated in the figures, can be arranged,
substituted, combined, and designed in a wide variety of different
configurations, all of which are explicitly contemplated and made
part of this disclosure.
Overview of Display Enclosure
[0012] FIGS. 1-5 illustrate a display system including a display
device 20 such as a LCD, LED or plasma flat panel display device
housed within a display enclosure 10. It should be noted that,
while element 10 is referred to as a "display enclosure" herein, it
is possible for this enclosure to house other media devices, such
as projectors, as well. The display enclosure 10 is a protective
enclosure configured to enclose the display device 20 so that the
display device 20 may be located in an outdoor viewing environment
or in other environments where the display device 20 requires or
may benefit from protection from ambient conditions. Accordingly,
the display enclosure 10 is constructed to resist and substantially
prevent ingress of various liquids that may be encountered in the
viewing location, including precipitation when the display
enclosure 10 is mounted for outdoor viewing of the display device
20. In various embodiments, the display enclosure 10 is constructed
to prevent ingress of rain, snow and splashing liquid. In a
particular embodiment, the display enclosure 10 is constructed to
prevent ingress of liquid at a submersed depth of up to five feet
of water, which may correspond to a ingress protection (IP)
modified rating of IP65 under the IP Code (the contents of which
are incorporated herein by reference).
[0013] The display enclosure 10 includes an enclosure chassis or
housing 22, a front cover 24, and a back cover 26. The housing 22
is configured to substantially enclose the display device 20 and
includes an access opening 32 and a front opening 30 substantially
opposite the access opening 32. The front cover 24 is coupled to
the housing 22 and covers the front opening 30 of the housing 22.
The front cover 24 is a substantially transparent material that
permits viewing of the display device 20 within the display
enclosure 10. The back cover 26 is coupled to the housing 22 and
covers the access opening 32 of the housing 22. A seal member may
be disposed about the periphery of the access opening 32 and
between the housing 22 and the back cover 26. The back cover 26 may
define one or more substantially sealed cable entry openings that
permit passage of various power, video, audio, and other data
carrying cables to the access opening 32.
[0014] Due to ambient conditions and the operation of the display
device 20, heat may collect within the interior of the display
enclosure 10. Such thermal modulation features may be active and/or
passive and provide temperature control within the display
enclosure 10 to assist in maintaining an internal temperature
within the display enclosure 10 that is within an operating range
of the display device 20. According to an exemplary embodiment, the
display enclosure 10 includes a thermal modulation system including
vent plugs 36 and check valves 38 received in openings defined in
the back cover 26. The vent plugs 36 and check valves 38 allow air
to pass between the interior of the display enclosure 10 and the
outside environment such that excess heat may escape the interior
of the display enclosure 10. The vent plugs 36 and the check valves
38 are configured to prevent the ingress of dust, dirt, or other
contaminants, thus maintaining an IP65 rating for the display
enclosure 10.
Enclosure Housing
[0015] The enclosure housing 22 includes an access opening 32 in
the rear surface of the enclosure housing 22 and a front opening 30
substantially opposite the access opening 32. The enclosure housing
22 is generally sized such that the display device 20 fits within
the region defined by the front opening 30. The access opening 32
provides entry for power and signal cables coupled to a display
device 20 disposed within the display enclosure 10.
[0016] The enclosure housing 22 is formed from a material having a
sufficient strength and rigidity to protect the display device 20,
while maintaining a low peripheral profile for the display
enclosure 10. According to one exemplary embodiment, the housing 22
is constructed of aluminum to provide a balance of high strength
and low weight, yet be resistant to rust or other corrosion typical
of expected mounting environments. Aluminum has a relatively high
thermal conductivity, and therefore provides a means for removing
heat from the interior of the enclosure via conduction through the
walls of the housing 22. However, in other embodiments, the housing
22 may be formed of another metal, alloy, or other material (e.g.,
a polymer material, etc.), especially when used in conjunction with
a corrosion resistant coating. Exemplary corrosion resistant
coatings are described in U.S. Pat. No. 8,102,483, the contents of
which are incorporated herein by reference. The housing 22 may be a
single-piece design, or may be formed from a multitude of separate
frame members. The frame members may be joined by welding,
adhesives, connecting elements, and combinations thereof.
[0017] The front portion of the housing 22 forms a bezel 40. The
bezel 40 has an inner edge 42 defining the front opening 30. The
housing 22 is constructed such that the width of the bezel 40,
i.e., the perpendicular distance between the bezel inner edge 42
and the outer periphery of the housing 22, the portion visible when
viewing the display enclosure 10 from the front, is minimized.
[0018] The display area of the display device 20 is visible through
the front opening 30. As such, the housing 22 may be constructed to
various dimensions to accommodate display devices 20 of different
sizes. For example, the housing 22 may be constructed in accordance
with display device 20 screen sizes that are commonly manufactured.
In a particular embodiment, the housing 22 is constructed to
accommodate a 47 inch display device 20. In other embodiments, the
housing 22 may be constructed to accommodate display devices of
other sizes (e.g., 32 inch, 55 inch, etc.).
Front Cover
[0019] With reference to FIGS. 1 and 3, the front opening 30 is
covered by the front cover 24. The front cover 24 is formed of a
substantially transparent material that permits viewing of the
display device 20 within the display enclosure 10. Accordingly, the
front cover 24 may comprise glass or a substantially transparent
plastic. In a particular embodiment, the front cover 24 comprises
tempered glass having a thickness of approximately 6 millimeter,
though other thicknesses may be used.
[0020] The front cover 24 is joined to the housing 22 in a manner
that prevents ingress of liquids, dust, and other contaminants into
the display enclosure 10 that may be encountered in the mounting
environment. For example, the front cover 24 may be bonded to the
housing 22 using an adhesive such as a urethane adhesive. The front
cover 24 may further include an anti-reflective coating on the
front and/or rear surfaces to reduce photopic reflection. The front
cover 24 may also be treated to mitigate ambient ultraviolet (UV)
light degradation the display device 20. For example, the front
cover 24 may include a UV coating configured to shield the display
device 20 from at least a portion of ambient UV radiation. In
various embodiments, the front cover 24 is of sufficient strength
to withstand ambient conditions when the display enclosure 10 is
located for outdoor viewing.
[0021] In one embodiment, the front cover 24 may be coupled to the
inner surface (e.g., interior surface) of the bezel 40. In another
embodiment, the front cover 24 may be coupled to the outer surface
(e.g., exterior surface) of the bezel 40. The edges of the front
cover 24 may be recessed about the thickness of the bezel 40 or the
edges of the bezel 40 may be recessed about the thickness of the
front cover 24 such that, when it is coupled to the inside surface
of the bezel 40, the front cover 24 and the outer surface of the
bezel 40 define a substantially smooth surface (e.g., the outer
surface of the front cover 24 is neither perceptibly raised above,
nor depressed below the outer surface of the bezel 40).
Back Cover
[0022] As illustrated in FIGS. 2, 4, and 5, the back cover 26 is
coupled to the outer surface of the housing 22. The back cover 26
may be contoured (e.g., to accommodate the physical dimensions of
the display device 20). According to an exemplary embodiment, the
back cover 26 includes an outwardly extending flange 44. When the
back cover 26 is positioned over the access opening 32, the flange
44 extends over the housing 22 about the periphery of the access
opening 32. The flange 44 is coupled to the housing 22, such as
with fasteners (e.g., threaded fasteners) passing through aligned
openings in the flange 44 and the housing 22.
[0023] The back cover 26 is formed from a material having a
sufficient strength and rigidity to protect the display device 20.
According to one exemplary embodiment, the back cover is
constructed of a UV-resistant polymer material to provide a balance
of high strength and low weight, yet be resistant to corrosion and
degradation typical of expected mounting environments. However, in
other embodiments, the back cover 26 may be formed of another
material, such as a metal or alloy. The back cover 26 may be formed
to have integrally formed mounting features (e.g., brackets, hooks,
sockets, etc.) or mounting bosses to which separate mounting
members may be coupled. The display enclosure 10 may be configured
to be mounted to a wide variety of structures, such as a pedestal,
a wall mount, a ceiling mount, or any other suitable structure.
[0024] The back cover 26 is coupled to the housing 22 in a manner
that prevents ingress of liquids, dust, and other contaminants into
the display enclosure 10. A seal member may be disposed between the
back cover 26 and the housing 22. In one embodiment, the seal
member may comprise an o-ring or gasket that is squeezed, sealing
the interface between the back cover 26 and the housing 22. The
seal member may be received in a groove formed in the back cover 26
and/or the housing 22. In the depicted embodiment, the seal member
may be a silicone material. In other alternative embodiments,
however, the seal member may be another suitable resilient
material, such as Teflon, fluorosilicone, urethane, HNBR,
polyacrylate, neoprene, butyl, hypalon, rubber, or the like.
Back Cover Openings
[0025] The back cover 26 and/or the housing 22 may define openings
that access into the interior of the display enclosure 10 for
cables (e.g., audio cables, video cables, data cables, power
cables, etc.). To prevent such ingress through the openings by
liquids, dust, or other contaminants, the openings may include
devices such as cable fittings 46 (e.g., cable glands, cord grips,
etc.) to seal the openings. The cable fittings 46 may include
sealing members formed of any suitable compressible material
including, but not limited to Teflon, fluorosilicone, urethane,
HNBR, polyacrylate, neoprene, butyl, hypalon, rubber, or the like.
The sealing member may include one or more passages to permit
cables to pass through the cable entry portion. Cable fittings 46
may be provided, for example, for audio cables running between the
interior of the display enclosure 10 and external speakers 48.
Thermal Modulation and Other Features
[0026] Various additional thermal control devices may be disposed
within or at least partially within the display enclosure 10, to
assist in maintaining the internal temperature of the display
enclosure 10. Thermal control may be accomplished by including
devices intended to add and/or remove heat from the display
enclosure 10 depending on ambient conditions and/or the operating
conduction of the display device 20. The various thermal control
devices may work independently or in concert to assist in
modulating the temperature inside the display enclosure 10 within
the operating temperature range and/or storage temperature range of
the display device 20 under various ambient conditions. According
to an exemplary embodiment, the display enclosure 10 includes one
or more vent plugs 36 and check valves 38 to allow for air to
selectively pass between the outside environment and the interior
of the enclosure 10. The vent plugs 36 and the check valves 38 are
received in openings defined in the back cover 26.
[0027] In a particular embodiment, each vent plug 36 is an IP65
rated vent plug that allows the ingress and egress of air through
the opening in the back cover 26 but does not allow the ingress of
water or other liquids into the interior of the enclosure 10. The
display enclosure 10 may include multiple vent plugs 36. For
example, as shown in FIG. 2, the display enclosure 10 may include
five vent plugs 36 arranged in a row along the top of the back
cover 26. In other embodiments, the enclosure 10 may include more
or fewer vent plugs 36 in the cover 26 and/or the housing 22. One
exemplary vent plug is a HEYClean.TM. vent plug manufactured by
Heyco.RTM.. Such vent plugs are coupled to the back cover 26 with a
snap fit and operate under a small back pressure.
[0028] In a particular embodiment, the check valves 38 are
configured to allow the passage of air in one direction through the
opening in the enclosure 10. According to an exemplary embodiment,
each check valve 38 is oriented such that allows the egress of air
from the interior of the enclosure 10, while preventing the ingress
of air into the interior of the enclosure 10. The check valves 38
close under any positive pressure from the outside. The check
valves 38 therefore allow air to escape the interior of the
enclosure 10 into the exterior environment if the pressure in the
interior of the enclosure increases to a pressure a predetermined
amount above the external atmospheric pressure. For example, as
shown in FIG. 2, the display enclosure 10 may include a check valve
38 positioned on the bottom of the back cover 26. In other
embodiments, the enclosure 10 may include more than one check
valves 38 in the cover 26 and/or the housing 22.
[0029] A back pressure may be created by a blower provided in the
interior of the display enclosure 10. The blower may be a separate
device provided within the enclosure 10 or may be device provided
integrally with the display 20. In one embodiment, the blower is
coupled to a thermostat and is configured to activate at a preset
threshold temperature. In another embodiment, the blower may be
otherwise activated, such as by a timer or a manual control.
[0030] When the thermostat detects that the temperature inside the
display enclosure 10 exceeds a preset threshold, the blower
activates, drawing air from the outside into the interior of the
display enclosure through the vent plugs 36. A cross flow
ventilation system is therefore provided to control the temperature
of the display 20 as the air passes over and through the display
20, removing heat before passing out of the enclosure 10 through
the check valves 38. In other embodiments, the display 20 may
heated, such as when the enclosure 10 is located in a cold
location, such as outside or in a room maintained at a relatively
low temperature (e.g., a walk-in freezer, etc.). A heating element
may be provided inside the enclosure 10 proximate to the vent plugs
36. When the thermostat detects that the temperature inside the
display enclosure 10 is below a preset threshold, the blower
activates, drawing air from the outside into the interior of the
display enclosure through the vent plugs 36. The air is warmed as
it passes over the heating element and warms the display 20 as it
passes over and through the display 20 before passing out of the
enclosure 10 through the check valves 38.
[0031] The vent plugs 36 and the check valves 38 therefore provide
a simple mechanism to manage the heat transfer for the display
enclosure 10 while preventing the ingress of moisture or other
outside contaminants. By managing the heat transfer of the display
enclosure, a media device contained within the enclosure 10, such
as the display device 20 may be operated within a desired
temperature range.
[0032] As utilized herein, the terms "approximately," "about,"
"substantially", and similar terms are intended to have a broad
meaning in harmony with the common and accepted usage by those of
ordinary skill in the art to which the subject matter of this
disclosure pertains. It should be understood by those of skill in
the art who review this disclosure that these terms are intended to
allow a description of certain features described and claimed
without restricting the scope of these features to the precise
numerical ranges provided. Accordingly, these terms should be
interpreted as indicating that insubstantial or inconsequential
modifications or alterations of the subject matter described and
claimed are considered to be within the scope of the invention as
recited in the appended claims.
[0033] It should be noted that the term "exemplary" as used herein
to describe various embodiments is intended to indicate that such
embodiments are possible examples, representations, and/or
illustrations of possible embodiments (and such term is not
intended to connote that such embodiments are necessarily
extraordinary or superlative examples).
[0034] The terms "coupled," "connected," and the like as used
herein mean the joining of two members directly or indirectly to
one another. Such joining may be stationary (e.g., permanent) or
moveable (e.g., removable or releasable). Such joining may be
achieved with the two members or the two members and any additional
intermediate members being integrally formed as a single unitary
body with one another or with the two members or the two members
and any additional intermediate members being attached to one
another.
[0035] References herein to the positions of elements (e.g., "top,"
"bottom," "above," "below," etc.) are merely used to describe the
orientation of various elements in the Figures. It should be noted
that the orientation of various elements may differ according to
other exemplary embodiments, and that such variations are intended
to be encompassed by the present disclosure.
[0036] It is important to note that the construction and
arrangement of the display device enclosure, as shown in the
various exemplary embodiments, are illustrative only. Although only
a few embodiments have been described in detail in this disclosure,
those skilled in the art who review this disclosure will readily
appreciate that many modifications are possible (e.g., variations
in sizes, dimensions, structures, shapes and proportions of the
various elements, values of parameters, mounting arrangements, use
of materials, colors, orientations, etc.) without materially
departing from the novel teachings and advantages of the subject
matter described herein. For example, elements shown as integrally
formed may be constructed of multiple parts or elements, the
position of elements may be reversed or otherwise varied, and the
nature or number of discrete elements or positions may be altered
or varied. The order or sequence of any process or method steps may
be varied or re-sequenced according to alternative embodiments.
Other substitutions, modifications, changes and omissions may also
be made in the design, operating conditions and arrangement of the
various exemplary embodiments without departing from the scope of
the present invention.
[0037] The foregoing description of embodiments of the present
invention have been presented for purposes of illustration and
description. It is not intended to be exhaustive or to limit the
present invention to the precise form disclosed, and modifications
and variations are possible in light of the above teachings or may
be acquired from practice of the present invention. The embodiments
were chosen and described in order to explain the principles of the
present invention and its practical application to enable one
skilled in the art to utilize the present invention in various
embodiments, and with various modifications, as are suited to the
particular use contemplated
* * * * *