| |
| United States Patent
|
5,692,647 |
| Brodie |
December 2, 1997 |
Solar power systems for self-contained fueling
stations
Abstract
This invention relates to solar power systems for self-contained
fueling stations. More particularly, this invention concerns the
attachment to and above such a fueling station of a post-mounted
solar power system, including a solar array providing shade for a
shielded box holding a battery and a power control system with a
wireless-remote-controlled safety power cutoff system. Such post and
solar power system may be folded down adjacent the fueling station,
thus enabling easier transport of the fueling station. The safety
power cutoff system includes a series of relay switches for
disabling key-switch control of a fuel pump.
| Inventors: |
Brodie; Richard G.
(Phoenix, AZ) |
| Appl. No.:
|
08/514,597 |
| Filed: |
August 14, 1995 |
| Current U.S.
Class: |
222/173 ;
136/291; 222/192; 222/608 |
| Current
International Class: |
B67D
5/64 (20060101); B67D 5/06 (20060101); B60S 5/00 (20060101);
B60S 5/02 (20060101); B67D 005/00 () |
| Field of
Search: |
222/173,608,192
137/234.6,376 136/291 |
References Cited
[Referenced By]
U.S. Patent
Documents
Other References
Washington Home, p. 5, "Solar Scoops", Nancy L. Ross May 26,
1994.. |
Primary Examiner: Shaver; Kevin P.
Attorney, Agent or Firm:
Stoneman; Martin L.
Claims
What is claimed is:
1. In association with an aboveground fueling station of the type
used in remote areas and comprising fuel pump means and fuel tank
means within protective enclosure means, the improvement comprising,
in combination:
a. mounted adjacent an upper surface of said fueling station and
extending upwardly above said protective enclosure means, post
means; and
b. supported above said protective enclosure means by said post
means, solar power means;
c. wherein said solar power means comprises
i. solar array means for generating electrical power;
ii. power control means for control of power of said fueling
station; and
iii. below said solar array means and substantially shaded by said
solar array means, box means for enclosing, supporting and shielding
of said power control means.
2. The improvement of claim 1 further comprising, within said box
means, battery means, rechargeable by said generated electrical
power from said solar array means, for providing power to said fuel
pump means.
3. The improvement of claim 2 further comprising
a. antenna means connected to said power control means,
b. wherein said power control means comprises power cutoff means
operable by a signal from a wireless remote control device.
4. The improvement of claim 3 wherein said power cutoff means
comprises:
a. means for receiving said signal;
b. first switch means, operable by said signal;
c. second switch means, controlled by said first switch means, for
cutting off power from said battery means to said fuel pump means.
5. The improvement of claim 4 wherein said power cutoff means
further comprises:
a. third switch means, controlled by said second switch means, for
cutting off power from said battery means to said fuel pump means.
6. The improvement of claim 5 further comprising key-switch means
for controlling operation of said fuel pump means by controlling
said third switch means when said third switch means is enabled by
said second switch means, whereby operation of said key-switch means
may be discontinued by said wireless remote control device.
7. The improvement of claim 6 further comprising reset means, in
association with said key-switch means, controlling reset of said
second switch means.
8. The improvement of claim 7 further comprising:
a. adjacent a lower portion of said post means and along said post
means, first hinge means enabling transport of said fueling station
with said post means in substantially horizontal position.
9. The improvement of claim 8 further comprising:
a. adjacent an upper portion of said post means, second hinge means
enabling transport of said fueling station with said solar array
means in a substantially horizontal position.
10. The improvement of claim 9 wherein said solar array means, said
box means, said first hinge means, and said second hinge means are
constructed and arranged to enable transport of said fueling station
with said post means in horizontal position, with said solar array
means in a substantially horizontal position and above said post
means, and with said box means below said post means.
11. In association with an aboveground fueling station of the type
used in remote areas and comprising fuel pump means and fuel tank
means within protective enclosure means, the improvement comprising,
in combination:
a. mounted adjacent an upper surface of said fueling station and
extending upwardly from said protective enclosure means, post means;
b. supported above said protective enclosure means by said post
means, solar power means; and
c. adjacent a lower portion of said post means and along said post
means, first hinge means enabling transport of said fueling station
with said post means in horizontal position.
12. The improvement of claim 11 wherein said solar power means
comprises
a. solar array means for generating electrical power;
b. power control means for control of power of said fueling station;
and
c. below said solar array means, box means for enclosing, supporting
and shielding of said power control means.
13. The improvement of claim 12 further comprising:
a. adjacent an upper portion of said post means, second hinge means
enabling transport of said fueling station with said solar array
means in a substantially horizontal position.
14. The improvement of claim 13 wherein said solar array means, said
box means, said first hinge means, and said second hinge means are
constructed and arranged to enable transport of said fueling station
with said post means in horizontal position, with said solar array
means in a substantially horizontal position and above said post
means, and with said box means below said post means.
15. The improvement of claim 14 further comprising
a. antenna means connected to said power control means,
b. wherein said power control means comprises power cutoff means
operable by a signal from a wireless remote control device.
16. In association with an aboveground fueling station of the type
used in remote areas and comprising fuel pump means and fuel tank
means within a protective enclosure, the improvement comprising, in
combination:
a. mounted to said fueling station and extending upwardly from said
protective enclosure, a post;
b. a solar array mounted on said post;
c. a steel box mounted on said post below said solar array and
substantially shaded by said solar array; and
d. enclosed in and supported by said box,
i. a battery for providing power for said fueling station and
rechargeable by electrical power from said solar array, and
ii. power control means for control of power of said fueling
station.
17. The improvement of claim 16 further comprising:
a. an antenna connected to said power control means,
b. wherein said power control means comprises power cutoff means
operable by a signal from a wireless remote control device.
18. The improvement of claim 17 wherein said power cutoff means
comprises:
a. a first relay controllable by said signal from said wireless
remote control device;
b. a second relay energized/closed through said first relay and
opening to cut off power from said battery to said fuel pump means
when said first relay is opened; and
c. a third relay energized/closed through said second relay and
opening to cut off power from said battery means to said fuel pump
means when said second relay is opened.
19. The improvement of claim 18 further comprising a key-switch for
controlling operation of said fuel pump means by controlling said
third relay when said third relay is energized/closed by said second
relay, whereby operability of said key-switch may be discontinued by
control of said signal from said wireless remote control device.
20. The improvement of claim 19 further comprising reset means, in
association with said key-switch means, controlling reset of said
second relay, whereby, when said key-switch has been rendered
inoperable, said key-switch may be again rendered operable only by
activation of said reset means.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to improved solar power systems for
self-contained fueling stations. More particularly, this invention
concerns the attachment to and above such a fueling station of a
post-mounted solar power system, including a solar array providing
shade for a shielded box holding a battery and a power control
system with a wireless-remote-controlled safety power cutoff system.
Such post and systems may be folded down adjacent the fueling
station, thus enabling easier transport of the fueling station.
2. Description of the Background and Prior Art
Environmental concerns have prompted governmental re-appraisals of
the underground storage of fuels and hydrocarbon products, which
frequently leak into the earth, contaminating water supplies and
doing other harm as well. All levels of government have issued and
are continuing to issue strict guidelines for the operation,
installation, and removal of underground fuel storage tanks. The
costs for required cleanup of such an underground leak are
frequently extremely expensive, even catastrophic.
Thus, there is nationwide interest in aboveground storage of such
fuels. And there has been continuing development of self-contained
and portable aboveground fueling stations having various storage,
dispensing, and power systems. Frequently, such systems find
immediate application for use in remote areas requiring, temporarily
or permanently, a local fueling station; and the provision of power
to operate fuel pumps, etc., is often more of a problem in remote
areas than in utility-served areas. Thus, it is often important to
try to eliminate the need for electrical service to the fueling
station.
A clear and recent example of the prior art is applicant's recently
issued U.S. Pat. No. 5,400,924 for an above-ground fuel tank system.
Shown and described therein is a self-contained fueling station
which may derive power from a roof-mounted solar array operating in
conjunction with a battery at ground level. Also described therein
is a general system for using a wireless signal from a wireless
remote control device to turn off an emergency shut-off switch which
turns off all electrical power to the fueling station.
Also, an example of a popular aboveground fueling system is the
portable and self-contained ConVault (TM) product, generally
including a steel fuel tank encased in a concrete vault with a fuel
dispensing system (see U.S. Pat. Nos. 4,826,644, 4,931,235,
4,934,122, and 4,986,436). It would be highly beneficial if such
self-contained or vaulted tanks could be provided with an efficient
source system of portable electrical power, which source system was
also safe to use and efficiently transportable with the aboveground
fueling station.
OBJECTS OF THE INVENTION
A primary object of the present invention is the provision of an
improved electrical power system for use in association with an
aboveground fueling station. Another primary object of this
invention is to provide an improved solar power system for use in
association with an aboveground fueling station. In addition, it is
an important object of this invention to provide such an improved
solar power system which is also safe to use and efficiently
transportable with the aboveground fueling station. Another
important object is to provide such systems with an emergency power
cutoff system which is safe, efficient, and may be
remote-controlled. Further, it is an important object of the present
invention to provide a means of constructing and mounting the
improved solar power system in association with the aboveground
fueling station so that it may be efficiently transported with the
aboveground fueling station. Other objects of this invention will
become apparent with reference to the following invention
descriptions.
SUMMARY OF THE INVENTION
According to a preferred embodiment of the present invention, there
is provided, in association with an aboveground fueling station of
the type used in remote areas and comprising fuel pump means and
fuel tank means within protective enclosure means, the improvement
comprising, in combination, the following. Mounted adjacent an upper
surface of such fueling station and extending upwardly above such
protective enclosure means, there are post means. Supported above
such protective enclosure means by such post means, there are solar
power means. And such solar power means comprises: solar array means
for generating electrical power; power control means for control of
power of such fueling station; and below such solar array means and
substantially shaded by such solar array means, box means for
enclosing, supporting and shielding of such power control means.
The present invention additionally provides battery means, within
such box means, for providing power to such fuel pump means and
rechargeable by such generated electrical power from such solar
array means. Also provided are antenna means connected to such power
control means, wherein such power control means comprises power
cutoff means operable by a signal from a wireless remote control
device. In addition, the present invention is provided wherein such
power cutoff means comprises: means for receiving such signal; first
switch means, operable by such signal; and second switch means,
controlled by such first switch means, for cutting off power from
such battery means to such fuel pump means. Yet additionally, the
present invention is provided wherein such power cutoff means
further comprises third switch means, controlled by such second
switch means, for cutting off power from such battery means to such
fuel pump means. Further provided is key-switch means for
controlling operation of such fuel pump means by controlling such
third switch means when such third switch means is enabled by such
second switch means, whereby operation of such key-switch means may
be discontinued by such wireless remote control device. This
invention also provides reset means, in association with such
key-switch means, controlling reset of such second switch means.
The present invention, even further, provides, adjacent a lower
portion of such post means and along such post means, first hinge
means enabling transport of such fueling station with such post
means in substantially horizontal position. And this invention also
provides, adjacent an upper portion of such post means, second hinge
means enabling transport of such fueling station with such solar
array means in a substantially horizontal position. Yet
additionally, the present invention is provided wherein such solar
array means, such box means, such first hinge means, and such second
hinge means are constructed and arranged to enable transport of such
fueling station with such post means in horizontal position, with
such solar array means in a substantially horizontal position and
above such post means, and with such box means below such post
means.
According to yet another preferred embodiment of the present
invention, there is provided, in association with an aboveground
fueling station of the type used in remote areas and comprising fuel
pump means and fuel tank means within protective enclosure means,
the improvement comprising, in combination: mounted adjacent an
upper surface of such fueling station and extending upwardly from
such protective enclosure means, post means; supported above such
protective enclosure means by such post means, solar power means;
and, adjacent a lower portion of such post means and along such post
means, first hinge means enabling transport of such fueling station
with such post means in horizontal position.
Further, according to this embodiment of the present invention, such
improvement is provided wherein such solar power means comprises:
solar array means for generating electrical power; power control
means for control of power of such fueling station; and below such
solar array means, box means for enclosing, supporting and shielding
of such power control means. There is further provided, adjacent an
upper portion of such post means, second hinge means enabling
transport of such fueling station with such solar array means in a
substantially horizontal position. Further provided is such
invention wherein such solar array means, such box means, such first
hinge means, and such second hinge means are constructed and
arranged to enable transport of such fueling station with such post
means in horizontal position, with such solar array means in a
substantially horizontal position and above such post means, and
with such box means below such post means. Even further provided by
this invention are antenna means connected to such power control
means, wherein such power control means comprises power cutoff means
operable by a signal from a wireless remote control device.
Even additionally, according to a preferred embodiment of this
invention, there is provided, in association with an aboveground
fueling station of the type used in remote areas and comprising fuel
pump means and fuel tank means within a protective enclosure, the
improvement comprising, in combination: mounted to such fueling
station and extending upwardly from such protective enclosure, a
post; a solar array mounted on such post; a steel box mounted on
such post below such solar array and substantially shaded by such
solar array; and, enclosed in and supported by such box, a battery
for providing power for such fueling station and rechargeable by
electrical power from such solar array, and power control means for
control of power of such fueling station.
According to this preferred embodiment, this invention further
provides an antenna connected to such power control means, wherein
such power control means comprises power cutoff means operable by a
signal from a wireless remote control device. Additionally, this
invention is provided wherein such power cutoff means comprises: a
first relay controlled by such signal to open; a second relay
energized/closed through such first relay and opening to cut off
power from such battery to such fuel pump means when such first
relay is opened; and a third relay energized/closed through such
second relay and opening to cut off power from such battery means to
such fuel pump means when such second relay is opened.
Also, according to this preferred embodiment, this invention
provides a key-switch for controlling operation of such fuel pump
means by controlling such third relay when such third relay is
energized/closed by such second relay, whereby operability of such
key-switch may be discontinued by control of such signal from such
wireless remote control device. Also provided is reset means, in
association with such key-switch means, controlling reset of such
second relay, whereby, when such key-switch has been rendered
inoperable, such key-switch may be again rendered operable only by
activation of such reset means.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view illustrating pictorially an aboveground
fueling station, improved according to a preferred embodiment of the
present invention and in working position.
FIG. 2 is a right side view, partially in section through the
section 2--2 of FIG. 1, of the fueling station of FIG. 1.
FIG. 3 is an expanded partial pictorial view (as in FIG. 1),
partially in section, illustrating a preferred embodiment of the
post means of the present invention, and showing the bottom hinge
thereof.
FIG. 4 is an expanded partial front view, partially in section,
illustrating, for the embodiment of FIG. 1, the folding of the post
means and solar power means in position for transport.
FIG. 5 is a close-up perspective view illustrating the remote
control means of a preferred embodiment of the present invention,
shown mounted to a partially-shown support.
FIG. 6 is an exploded view, partially in section, of the remote
control means of FIG. 5.
FIG. 7 is a close-up perspective view illustrating the key-switch
and reset button (set in a housing) of the preferred embodiment of
FIG. 1.
FIG. 8 is a circuit diagram of the power control means of a
preferred embodiment of the present invention.
FIG. 9 is an expanded view, partially in section, of the box means,
battery means, and power control means portions of the preferred
embodiment of FIG. 1.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT AND THE BEST MODE OF
PRACTICE
FIGS. 1 and 2 illustrate an aboveground fueling station 21 of the
type used in remote areas and containing fuel tank means 22a (shown
in section in FIG. 2) within protective enclosure means 22 (such as
the illustrated concrete vault), improved according to a preferred
embodiment of the present invention and in working position.
Fuel-dispensing means 23, including fuel pump means 23a, fuel meter
means 23b, fuel dispensing line 23c, and key-switch/reset box 23d,
are shown extending from protective enclosure means 22.
Post means 24, mounted on an upper surface 25 of protective
enclosure means 22, includes, at the lower end 24a of post means 24,
bolt mounting 26 for such bolting/mounting of post means 24 to such
upper surface 25 of protective enclosure means 22. Post means 24
also includes first hinge 27 (not shown in FIG. 1), sleeve 28
(covering first hinge 27 when fueling station 21 is in working
position), post 29, and second hinge 30 (not shown in FIG. 1). Box
means 31 is attached to post 29 by box mounting 32.
Solar array means 33 (for providing solar energy in well known ways)
is attached to post 29 at second hinge 30 at the upper end 24b of
post means 24. By adjusting second hinge 30 (which may include, in
well known ways, a universal hinge or double hinge for maximum
flexibility), the angle between solar array means 33 and post 29 may
be adjusted. In FIGS. 1 and 2, this angle is shown appropriately set
for solar array means 33 to receive maximum sunlight and to shade
box means 31. Box means 31, as shown, preferably has a receiving
antenna 34 extending downwardly therefrom for receiving wireless
signals 35a from wireless remote control device 35.
As shown best in FIGS. 3 and 4, post means 24, when in its working
position (as shown in FIG. 1), is held in substantially vertical
position by moving sleeve 28 (from its position shown in FIG. 3)
over first hinge 27 (into its position shown in FIG. 1), by
loosening sleeve set screws 36, moving sleeve 28 into position over
first hinge 27, and then tightening sleeve set screws 36. To place
post means 24 into a substantially horizontal position to enable
efficient transport of fueling station 21 (as by a bed of a truck,
securely and without undue height), first hinge 27 is moved upward
along post 29 to the position above first hinge 27 as shown in FIGS.
3 and 4. This permits post 29 to be swiveled about first hinge 27 to
the horizontal position shown in FIG. 4. It is preferred, to enable
most efficient transport of fueling station 21, that box means 31 be
also moved, for transport, from its working position (as shown in
FIG. 1) to its transport position beneath post 29 (as shown in FIG.
4) by loosening box mounting set screws 37 and then retightening box
mounting set screws 37 when box means 31 has been properly placed.
It is also preferred, to enable most efficient transport of fueling
station 21, that solar array means 33 be also moved, for transport,
from its working position (as shown in FIGS. 1 and 2) to its
horizontal transport position above post 29 (as shown in FIG. 4), by
swiveling solar array means about second hinge 30 (or, as mentioned,
a well-known alternative such as a universal hinge or double hinge).
As will be described in detail in connection with the discussion of
FIGS. 8 and 9 hereinafter, box means 31 encloses, supports, and
shields the power control means 50 for fueling station 21, and also
encloses, supports, and shields the battery means 51 for fueling
station 21. It is preferred that these contents of box means 31 be
maintained at appropriate cool temperatures; and it is thus
preferred that, in adjusting the exact disposition of solar array
means 33 into working position, and in adjusting the exact position
of box means 31 in working position, that such dispositions be
matched so that solar array means 33 provide as much shade as
possible for box means 31, as exemplified in FIG. 1. It is noted
that the solar power means of the present invention, supported above
protective enclosure means 22 by post means 24, comprises solar
array means 33, power control means 50, and box means 31 for
enclosing, supporting, and shielding power control means 50, as well
as battery means 51.
FIGS. 5 and 6 illustrate the wireless remote control device 35 of a
preferred embodiment of the present invention, shown optionally
mounted to a support means 38. Generally, safety regulations for
fueling stations demand that there be remotely-operable emergency
power cutoff control. Typically today, even for remote
self-contained fueling stations, the station installation demands
the digging of a trench for several hundred feet for the laying of
appropriate wires from the fueling station to an emergency cutoff
switch or button. By using the wireless remote control device 35 of
the present invention for emergency cutoff signalling, the expense
and inconvenience of the mentioned trenching and wiring is
eliminated.
The wireless remote control device 35 includes, externally, casing
39, face plate 40, cutoff button 41, and antenna cover cap 42.
Internally, button-operated switch 43 lies between cutoff button 41
and signal generator 44; and, in well-known ways, signal generator
44 emits a signal 35a for wireless transmission by transmitter
antenna 45. When cutoff button 41 is pushed, as in an emergency,
button-operated switch 43 temporarily turns off signal generator 44
and, temporarily, no wireless signal 35a is transmitted by
transmitter antenna 45. This creates a situation in which receiving
antenna 34 temporarily receives no wireless signal 35a (further
discussed hereinafter in connection with FIG. 8).
FIG. 7 illustrates more clearly the key-switch/reset box 23d of the
preferred embodiment of FIG. 1. Externally, casing box 46 is
attached as shown to protective enclosure means 22. Extending from
casing box 46 is key-switch 47 and power reset button 48, located
efficiently and safely adjacent key-switch 47. Key 49, as shown,
will be available to those with authority to operate fuel dispensing
means 23. Internally, the electrical operation and connections of
key-switch 47 and reset button 48 are described in connection with
FIG. 8.
FIGS. 8 and 9 illustrate, respectively, a circuit diagram of the
power control means 50 of a preferred embodiment of the present
invention, and the physical arrangement of contents of the box means
31 of the preferred embodiment of FIG. 1, including battery means
51, and power control means 50 portions. With receiving antenna 34
normally receiving a continuous wireless signal 35a from wireless
remote control device 35, small relay switch 52 (shown open, see
FIG. 8) is, in well-known ways, maintained energized in a closed
position. Thus, power relay switch 53 (shown open) is also normally,
in well-known ways, maintained energized in a closed position. Thus,
with the power then operative, when key-switch 47 (shown open) is
turned to a closed position, key relay switch 54 (shown open) will
become energized and be, in well-known ways, maintained energized in
a closed position, thus permitting power to go (through low pass
filter 55) to pump motor 56 of fuel pump means 23a, until key switch
47 is turned back to the "off" position, opening (in well-known
ways) key relay switch 54 and removing power from pump motor 56. It
is noted that battery means 51 may be used also for purposes other
than herein described, for example to provide power to lights
associated with fueling station 21; and, in all such cases, it is
intended that
When cutoff button 41 of wireless remote control device 35 is
pushed, the wireless signal 35a to small relay switch 52 (see FIG.
8) is temporarily interrupted, thus small relay switch 52, being no
longer energized, opens, thus, in well-known ways, removing power
from power relay switch 53, which, being no longer energized, opens
and disables key switch 47 from any further ability to produce
energizing of key relay switch 54, thus effectively removing all
possibility of power to pump motor 56. This emergency power cutoff
(by use of the described emergency power cutoff means comprising
small relay switch 52 and power relay switch 53) will continue until
power relay switch 53 is reset (at 57 in FIG. 8) to be
"energized"--by pushing reset button 48. It is expressly noted that,
in making the power cutoff means of the present invention operable
by a signal 35a from a wireless remote control device 35, the remote
control device 35 may be designed to SEND a cutoff signal (rather
than CEASE so sending as hereinabove described); and such cutoff
signal may be used to interrupt the ground connection (at "SIG" in
FIG. 8) of an energized small relay switch 52 in well known ways,
as, for example, in many garage-door openers. A decision about which
such operability method to use in a specific business instance will
depend upon such things as battery requirements for remote device 35
for sending a continuous signal 35a, the requirements of any
involved safety agency as to degree of "fail-safe" design permitted,
etc.
With reference to FIG. 9, illustrating a preferred arrangement of
the various contents of box means 31 and the connections of those
contents with other physical parts of fueling station 21, box casing
58 is attached to box mounting 32, which, as has been described
herein, is mounted to post 29. Box face plate 59 is removably
attached, as shown, to box casing 58. Preferably, box casing 58 and
box face plate 59 are made of steel to provide, in well-known ways,
a good combination of strength and electrical shielding. Box divider
60 separates box means 31 into two adjoining spaces, battery space
61 and power control space 62. Box divider 60 contains therein
divider aperture 60a to permit electrical connections between
battery means 51 in battery space 61 and power control means 50 in
power control space 62.
As shown, power control space 62 contains: photovoltaic charge
controller means 63 for electrically controlling, in well known
ways, power from solar array means 33; control parts 64 and 65 for
equipping the electrical functions of low pass filter 55a (see FIG.
8) and small relay switch 52; power relay equipment 66 for equipping
the electrical functions of power relay switch 53; key relay
equipment 67 for equipping the electrical functions of key relay
switch 54; and filter box 68 for equipping the electrical functions
of low pass filter 55. Also, as shown, electrical connections 69
from power control means 50 to motor 56, key-switch 47, and reset
button 48 pass through box casing 58 at box casing aperture 72; and
electrical connections 70 from photovoltaic charge controller 63 to
solar array means 33 passthrough box casing 58 at box casing
aperture 73. Also, as shown, antenna mounting 71 in box casing 58
provides for the signal from receiving antenna 34 to pass through
box casing 58 to power control means 50.
All of the described contents of box casing 58 may be mounted
therein in by screws or in other manners well known to those skilled
in the art. Depending upon the fuel pump means, pump operating
amperes, and other settable electrical criteria, those skilled in
the art will have no difficulty determining, in well known ways, the
specific component selection and values for all of the parts of the
circuit illustrated in FIG. 8.
Although applicant has described applicant's preferred embodiments
of this invention, it will be understood that the broadest scope of
this invention includes such modifications as diverse shapes and
sizes and materials. Such scope is limited only by the below claims
as read in connection with the above specification.
Further, many other advantages of applicant's invention will be
apparent to those skilled in the art from the above descriptions and
the below claims.
* * * * *
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