U.S. patent number 3,861,519 [Application Number 05/290,741] was granted by the patent office on 1975-01-21 for display cabinet, track and controls.
Invention is credited to Richard Louis Ware.
United States Patent |
3,861,519 |
Ware |
January 21, 1975 |
DISPLAY CABINET, TRACK AND CONTROLS
Abstract
A display cabinet is shown in which a drive mechanism comprising
a pair of opposed endless link chains are coupled to a plurality of
trays which move in a generally closed vertical path around a
plurality of lights selected for their growth characteristics. A
single column is provided at the two opposed ends which, in
combination with a plurality of brackets, outside panels, and
inside panels, provide a track for the chain, a guide for the
brackets which support the trays, and support for the lights which
illuminate the plants. Reversely bent end portions on the column as
well as the outside panels add rigidity to the unit, and support to
the track for the chain which, in turn, is tightly confined within
the track and yet is sufficiently limber to rotate without
excessive binding friction. The brackets are formed of a single
piece of wire to nestingly receive a pivot pin in a partially
closed circular end of the bracket, the pivot pin being
proportioned to receive a keyhole in the hanger arm which supports
the trays. An irrigation control comprising a pin selectively
positioned through one of the roller holes in the link chain
cooperates with a switch which in turn is coupled to the irrigation
system thereby permitting preselection of those trays which are to
be irrigated, and those which are not to be irrigated. Means are
also provided to tension the entire drive assembly to the end that
play and binding effects in the chain can be minimized, and in
addition tray height adjustment means are provided on the various
sprocket mounts to permit accurate level alignment of the trays.
Alternative tray constructions are shown, one of which permits
containerization of potted plants to be transported through the
entire chain of distribution in a single nesting rack which
ultimately fits within the framework of a tray carried by the
subject display cabinet.
Inventors: |
Ware; Richard Louis
(Northfield, IL) |
Family
ID: |
23117351 |
Appl.
No.: |
05/290,741 |
Filed: |
September 20, 1972 |
Current U.S.
Class: |
211/121; 198/814;
312/266; 198/797; 312/115 |
Current CPC
Class: |
A47B
63/067 (20130101); A47F 3/08 (20130101) |
Current International
Class: |
A47F
3/00 (20060101); A47B 63/06 (20060101); A47F
3/08 (20060101); A47B 63/00 (20060101); B65g
017/00 () |
Field of
Search: |
;198/158,138,208 ;47/1.2
;211/1.5,121 ;312/266,268 ;74/243PC |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Blunk; Evon C.
Assistant Examiner: Watts; Douglas D.
Attorney, Agent or Firm: Dominik, Knechtel, Godula &
Demeur
Claims
What is claimed is:
1. A display cabinet and track assembly comprising,
a pair of opposed end columns,
each column having a U-shaped column member with side walls and a
base,
said side walls terminating in an outwardly turned end forming one
wall of a bracket guide,
brackets of U-shaped configuration formed for mounting to the
column side walls to cover the open portion opposed from the base
and an offset portion at the intersection of the side mount and
base,
outside panels for mounting to the bracket bases and having a track
base secured thereto and in perpendicular relationship to said
panels and offset from the outer edge to define a bracket guide
flange,
a drive member in the form of a chain,
said track base, offset end, and column guide wall defining a track
channel,
brackets secured to the chain for holding a plurality of trays,
said bracket guide flange and said outwardly turned column edges
defining a bracket guide,
whereby the column serves to support the end of the display cabinet
and in combination with the outside panels provides a track guide
for the chain and bracket guide for the brackets.
2. In the display cabinet and track assembly of claim 1,
opposed sprockets for driving said chain,
means for mounting said sprockets on a slidable member,
and yieldable tension means secured to each column for adjustably
preselecting the tension to be placed upon a remote sliding means
for mounting said sprockets,
whereby said sprockets and their associated chains may be
selectively tensioned for field usage.
3. A display cabinet and track assembly of the character defined in
claim 1 above wherein,
the column ends are reversely folded to define the offset portions
thereof, and
the bracket guard flange and track base are reversely folded
portions of the outside panels,
whereby additional double thickness members are provided opposed
portions of the bracket guide, and at the inner portion of the
track guide.
4. In the display cabinet and track assembly of claim 1,
an inside panel mounted to said U-shaped bracket and beneath the
internal marginal edges of said outside panels,
and a plurality of light sockets positioned in said center panels
for physically and electrically connecting a plurality of growth
lights intermediate the path of the plurality of trays held by the
brackets.
5. In the display cabinet and track assembly of claim 1
wherein,
said brackets are a single bent formed wire member having offset
legs which penetrate holes in said link chain, and
a pivot pin secured in the arcuate portion defined by the bent
intersection of two legs of said bracket,
and wherein arcuate form is in excess of 180.degree.,
and means on said pivot pin for securing a hanger to the plurality
of trays.
6. In the display cabinet of claim 5 above,
a hanger fixed to said tray at each end thereof,
a keyhole slot in the end of each hanger,
and a keyhole slot receiving undercuts on each pivot pin,
whereby said trays and said hangers may be removably secured
without additional parts to said pins.
7. In the display cabinet of claim 1,
said outside panels being curved centrally at their end portions to
provide relief for the brackets as the same pass around sprockets
at the upper and lower portion of the column.
Description
BACKGROUND OF INVENTION
1. Field of Invention
The field of invention in its principal utility finds itself
classified in part in Class 47-17 and more particularly display
cabinets which also permit the growth of horticultural products and
plant life while irrigating and lighting the same pursuant to a
preselected plan. In addition, however, the display cabinet can be
used to merchandise perishable foodstuffs such as lettuce,
strawberries, and the like, where timed irrigation will prolong the
shelf life of the perishables.
2. The Prior Art
The prior art is best exemplified in U.S. Pat. No. 3,529,379
disclosing a commercial predecessor of the device illustrative of
the present invention. Another relevant example of the prior art is
U.S. Pat. No. 3,254,448. These examples of the prior art have
operated satisfactorily in controlled conditions with constant
supervision in accelerating the growth of plant life. While this is
fine for school and laboratory purposes, it has since been
determined commercially that the subject display cabinet when sold
with potted plants which are properly irrigated and illuminated
serves as an excellent display chamber, and cuts the traditional
potted plant loss experienced by many stores to a mere fraction of
the historical budgeted loss. Furthermore, flexibility in marketing
is provided because potted plants at various stages of development
can be placed within the subject display chamber without
interrupting their continued growth, bloom, nourishment, and
development.
Because the subject display cabinet is intended to operate for
days, if not weeks and months, with minimum supervision and
maintenance, it is more important that the principal moving part,
the endless chains, be adequately confined and controlled.
Furthermore, the economics of construction are such that even
extrusions become expensive, whereas a configuration which can be
built up from simply punched and bent sheet metal is more
competitive, reduces the material cost, reduces the labor cost, and
yet enhances the durability and trouble-free operation of the
devices. Thus the prior art, while teaching the broad concept of
movable trays and fixed growing lights as well as an irrigation
system, did not teach the structural means directed to achieving
such combination in an environment of marginal sophisticated care,
maintenance, and repair.
SUMMARY
A display cabinet is shown which utilizes a pair of opposed endless
chains to mount a plurality of trays in which the motion of the
chains is confined by opposed parallel tracks which are defined in
the construction of a single column of U-shape, a plurality of
U-shaped brackets mounted to the column, and a pair of outside
panels flanking an inside panel which are secured to the brackets
and closing the open end of the U-shaped column to define a track
for the endless chain, a housing for the electrical system, and
sprockets for the parallel lights. In addition, those elements
defining the track have extensions which define a bracket guide,
both formed from standard sheet metal. A control is provided for an
irrigation system which is tied into the track by means of the
holes through the roller chain and comprises a removable pin which
can be preselectively positioned within a particular link of the
chain so that in timed relationship to the passing of its tray by
the irrigation means, irrigation can be selectively activated,
deactivated, or rendered not in use in such instances where foliage
such as cactus, or even artificial plants are displayed on one
tray, whereas plants requiring considerable irrigation are disposed
on adjacent trays. The sprocket drive mechanisms for the main chain
as well as the sprocket drive from the motor drive are all slidably
mounted on slide plates which in turn cooperate with guides on the
column and a yieldable tension means at the lower portion of the
display cabinet whereby all of the chain members in the unit may be
preselectively tensioned to maintain operable tensioning of the
chain under actual load conditions. Related thereto is the
provision of means for adjusting the sprockets with relationship to
opposed sprockets and the opposed chain to the end that the
supported trays can be leveled when an out-of-level condition
occurs between the opposed drive mechanism. The hanger brackets,
which are also keyed into the endless drive chain and sprockets,
are provided with means for self-energizingly engaging a pivot pin
at the apex of the two legs which pivot pin, in turn, engages a
keyhole at the upper end of the hanger arms thereby permitting
quick interchangeability of trays where, for example, a framelike
tray is provided to receive containerized potted plants which are
retained in nests which are preformed at the growing center such as
a greenhouse, and continue to house and hold the potted plants even
when displayed, illuminated, and irrigated by the subject display
cabinet.
DESCRIPTION OF THE DRAWINGS
Further objects and advantages of the present invention as well as
a better understanding of the same will become apparent as the
following description proceeds, taken in conjunction with the
accompanying drawings in which:
FIG. 1 is a perspective view of a display cabinet illustrative of
the present invention.
FIG. 2 is a partially sectioned view taken from inside the display
cabinet of FIG. 1 looking to the lefthand end portion thereof, the
same being partially broken and partially sectioned to illustrate
the spacial relationship of operable members.
FIG. 3 is a transverse sectional view looking downward from section
line 3--3 of FIG. 2 illustrating the end column, chain track, and
bracket track and related elements.
FIG. 4 is a front elevation in reduced scale illustrating an
outside panel.
FIG. 5 is a partially broken enlarged view illustrating the
connection between the bracket and chain by means of a plastic
bracket mount.
FIG. 6 is a perspective view of the plastic bracket mount shown in
FIG. 5.
FIG. 7 is an enlarged partially broken diagrammatic view
illustrating the relationship between the irrigation actuating pin,
link chain, and irrigation switch mechanism.
FIG. 8 is an enlarged partially broken view illustrating the
relationship between the tray, tray hanger, bracket, and pivot pin
provided at the apex of the bracket.
FIG. 9 is a longitudinal sectional view taken through one of the
end columns generally along section line 9--9 of FIG. 1 but broken
in the mid portion and base portion to illustrate primarily the
drive mechanism.
FIG. 10 is a transverse sectional view of the drive mechanism shown
in FIG. 9 taken along section line 10--10 of FIG. 9.
FIG. 11 is a perspective view of a transport container intended for
usage in a modified tray construction.
FIG. 12 is a flat layout view of the material from which the
container is folded.
FIG. 13 is a perspective view of an alternative embodiment tray
used in combination with the container.
DESCRIPTION OF PREFERRED EMBODIMENT
A display cabinet 10 illustrative of the present invention is shown
in FIG. 1 where it will be seen that the same is generally
rectangular in configuration. A plurality of trays 11 are provided
which move in a generally vertical closed path in flanking
relationship to a plurality of lights 12 of the character designed
for emitting light most appropriate to the maintenance of the
growth cycle of a plant. The lights 12 are oriented primarily in a
vertical plane, and secured to the ends of the cabinet in sockets
14 (shown in greater detail in FIG. 2). A plurality of tray
brackets 15 are secured to a pivot pin 16 which in turn are coupled
to the hanger arms 18 which support the trays 11.
The physical structuring of the display cabinet 10 as well as the
drive means including means for guiding the chain as well as the
bracket are primarily a function of the structure and configuration
of the end column 20. The end column 20, as shown, has a plurality
of shroud fasteners 27 which, in turn, secure a pair of transparent
shrouds in flanking relationship to the end column 20, the shrouds
being further secured in the shroud trim 22. A base 24 and top 25
join the two end columns 20 and their flanking transparent shrouds.
Controls 26 are conveniently provided interiorly of the end column
20 and may be preselected to determine the period of time per day
that the lights 12 are on, a period of time during which the
irrigation bar 29 may be activated to irrigate the trays as they
pass, and further to shut down the entire unit overnight, if this
is desired.
The particular details of the end column 20 will be best
appreciated by reference to FIG. 3 where it will be seen that the
end column 20 has as its principal member the U-shaped base column
30 having a pair of opposed side walls 63 and a base 31. At the
terminal ends of the side walls 63, reversely folded ends 32 become
evident. The reversely folded ends 32 provide structural stability
for the column 30, provide a means for thick metal reinforcement
where the column 30 is secured to the base 24, and also provide one
of the side walls for the bracket guide 46. In addition, the
transparent shrouds 21 are secured by means of the shroud fasteners
27 to the reversely folded ends 32.
To enclose the box-like structural aspect of the base column 30, a
plurality of column brackets 35 are provided which have a bracket
base 39 positioned generally across the open U-shaped portion of
the column 30, the base 39 terminating in a combination track
offset 36, and side mount 38. The side mounts 38 are opposed
members, and are secured by means of welding, bolting, or other
convenient fastening to the side walls 63 of the column 30. As
illustrated in FIG. 2, the column bracket 35 is positioned at a mid
portion, and is further illustrated in FIGS. 9 and 10, at upper and
lower portions across the column 30.
To close off the open end portion defined by the column 30, and
provide for proper guidance for the chain drive and tray brackets
15, a pair of outside panels 40 are provided of the general
configuration shown in FIG. 4. The outside panel has a reversely
folded bracket guide flange 65 which extends vertically from the
plane of the outside panel 40 and becomes the base of the track
guide or track base 41 (see FIG. 3). As will be further observed, a
plurality of bracket holes 43 are provided on the outside panel 40
which permits securing the same to the column bracket 35 by means
of fasteners 62 as illustrated in FIG. 3. In addition, inside panel
holes 47 are provided in the outside panel 40 to secure the central
inside panel 42 to the base 39 of the column bracket 35 by means of
its side panel fasteners 66.
As set forth in the objects of the invention, it is important to
provide a track channel 45 for the endless chain 50, the same being
shown in FIG. 3. There it will be seen, as set forth above, that
the lower portion of the side walls 63 of the column 30 provide the
outer portion of the track guide 45, and the inner portion is
provided by the track base 41 which in turn is formed out of the
bracket guide flange 65. The opposed side walls of the track guide
45 are defined by the track offset 36 between the side mounts 38
and base 39 of the column bracket 35. The opposite side of the
track guide 45 is the portion of the bracket guide flange 65 which
is in direct opposition to the reversely folded ends 32 of the side
wall 63 of the column 30, thereby defining an arrow-shaped guide
space which includes the bracket guide 46 as well as the track
channel 45. In each instance, those elements where side play may be
involved are reversely folded or double reinforced such as the
reversely folded flange 65, and the reversely folded end 32. In
addition, the inner portion includes the track base 41 in
opposition to the track offset 36 of the column bracket 35. Because
the chain 50 is under tension and adjustably held there by the
tension spring adjustment 80 (to be described hereinafter)
reinforcement is not required by double thickness of metal at the
lower end portion of the side walls 63 of the column 30. The
desirability of a bracket guide 46 with the rigid reversely folded
elements as described above will become apparent as a description
of the tray bracket 15 proceeds. Noting first FIGS. 5 and 8, it
will be seen that the bracket (also see FIG. 1) is a V-shaped
member terminating in a bracket head 17 which is a shaped portion
covering more than 180.degree. of a circle, and preferably
270.degree. of a circle. The bracket head 17 then yieldably engages
the pivot pin 16, as better illustrated in the lower lefthand
corner of FIG. 3. Also it will be noted that the pivot pin 16 is
provided with a hanger key 23 which is an undercut at the end of
the pivot pin 16. The hanger arms 18, as shown in FIG. 8, which
support the tray 11, are provided with a keyhole 19 in the upper
end portion thereof, the narrow neck of which is proportioned to
nestingly and pivotally engage the hanger key 23 of the pivot pin
16. Thus as the legs of the tray bracket 15 are squeezed inwardly
and outwardly as the same goes over the upper portion of the chain
track (see FIG. 1) the flexing action will self-energizingly
squeeze the bracket head 17, and therefore reinforce the grip on
the pivot pin 16 from which the hanger arm 18 and tray 11 depend
and are held in such depending relationship by gravity throughout
the upper portion of the travel of the tray 11 around and to come
down the other side of the display bracket 10. At the opposite of
each one of the legs of the tray bracket 15, provision is made for
a bracket leg 44 (see FIG. 3) which is offset at approximately
90.degree. from the plane of the tray bracket 15. The bracket leg
44, as shown in FIG. 5, is inserted into one of the holes along the
link chain 50 which is the hollow interior of the chain roller 54,
as shown in FIG. 7. A bracket plastic mount 48 (see FIG. 6) is
provided for opening by means of spreading the sprocket tooth slot
53 and positioning over the link chain 50 as shown in FIG. 5, with
the bracket leg 44 being inserted through the bracket leg holes 49
on the opposed side walls of the bracket plastic mount 48.
Thereafter, as shown in FIG. 3, the bracket leg 44 is secured by
various means to the chain 50, in the instance shown a pair of
offset ears support a washer immediately adjacent the elbow where
the bracket leg 44 enjoins the body of the bracket, and the
opposite end after passing through the opposed bracket leg hole 49
is secured by means of a tinnerman nut or other fastening means
thereby firmly securing the bracket within the track channel 45 as
well as the bracket guide channel 46.
When the link chain 50 is tensioned by means of the tension spring
assembly 80 to be described hereinafter, the accuracy of the link
chain 50 for purposes of positioning the trays 11, and otherwise
controlling the operation of the display cabinet 10, is quite
reliable. It is for this reason that the link chain 50, as shown in
FIG. 7, may be provided with an irrigation pin 55 which may also be
inserted at preselected locations through the hole in the chain
roller 54. As shown, the inner link plates 51 and outer link plates
52 always provide a double thickness of links at each of the
rollers 54. The irrigation pin, as shown, is molded of plastic and
has a head 56 provided with an aperture therein for removal, and a
body 58 which passes through the hole in the roller 54 and
terminates in a snap end 59. To remove the pin, a wire can be
inserted through the aperture in the head 56 of the irrigation pin
55, and the opposed snap ends 59 squeezed together by the fingers,
and the irrigation pin 55 removed and installed in another
location. As shown in FIG. 1, an access door 57 is provided in the
front portion of one of the outside panels 40 to permit the
operator to open the access door 57, and position the pin in
preselected relationship to the positioning of the particular trays
11, so that the snap end 59 of the irrigation pin 55 will engage
the irrigation switch 60 by striking its switch paddle 61 and
thereafter activating or deactivating the irrigation bar 29 in
timed relationship to the passage of various of the trays 11. For
example, if in one display tower cactus and artificial flowers may
be one tray 11, and African violets on another tray, it will be
desirable to irrigate the African violets and yet deactivate the
irrigation when the artificial flowers or cactus pass the
irrigation bar 29. This purpose is served by the irrigation pin 55
in combination with the irrigation switch 60.
As pointed out above in connection with the utilization of the
irrigation switch 60 on its activating irrigation pin 55, it is
important that the link chain 50 be properly tensioned. The means
for providing this proper tension, and adjustability to properly
orient the trays 11, are shown in FIGS. 9 and 10. There it will be
seen that the entire display cabinet drive mechanism is operated as
a function of the drive motor 70 to which opposed drive shafts 71
are attached. The drive shafts connect at a bearing 72 above the
opposed end columns 20 of the display cabinet 10 which may also
serve as a speed reducer where desired. At the terminal opposed
ends of the drive shaft 71 provision is made for a sprocket 74 to
drive the upper motor chain 73 which, in turn, is engaged in
sprocket drive relationship by the lower motor sprocket 75. The
link chain 50 is ultimately wreathed about the upper chain sprocket
76 and lower chain sprocket 77 to be guided through the track
channel 45 as described above. In order that the link chain 50 as
well as the upper motor chain 73 all be tensioned uniformly, it
will be observed that the respective sprockets and chains are
coupled in series to a tension spring assembly 80 provided at the
lower portion of the column 20. Each of the respective upper
sprockets 76 and lower sprockets 77 are secured to a pair of
tension assemblies, an upper tension assembly 78 and a lower
tension assembly 79. The tension assemblies each have a slide plate
89 with guides 90 for mounting thereon by means of the slots 91 and
bolts 92 as shown. It will be further observed that the guides 90
are mounted to the side walls 63 of the end columns 30.
Observing now the lower portion of FIGS. 9 and 10, it will be seen
that the tension spring assembly 80 includes a tension spring
bracket 81 which is also mounted to the side walls 63 of the
U-shaped column member 30, and secured to the tension spring
bracket 81, is a partially threaded shaft 85 having a hook 86 which
engages a tension hole 87 provided in the lower portion of the
lower slide plate 89 which supports the lower sprocket 77. The
spring 82 is then adjusted by means of rotating the nut 88 against
the spring support washer 84 to progressively increase or decrease
the tension on the various chain members, and then secured more
permanently if desired by tightening the bolts 92, but in most
operations it will be found that the bolts 92 serve merely to guide
the slide plates 89 along the guides 90.
To further assist in "tuning" the unit, above and beyond providing
for appropriate tension on the various chains by means of the
tension spring assembly 80, the upper motor sprockets 74 are
mounted on sprocket plates 94. An orientation slot 95, shown in
crescent configuration in FIG. 10, is provided in combination with
an adjustment bolt 96 to the end that the alignment of the
respective sprocket plates and trays 11 at the opposite ends of the
display cabinet 10 may be properly adjusted to a level relationship
with the end columns of the display cabinet. It has been observed
in practice that adjustment by means of set screw is often
frustrated in usage, particularly rough usage. On the other hand, a
positive connection between the shaft and sprockets by means of the
crescent shape radial orientation slots 95 may be achieved.
Further illustrating the advantages of the subject display cabinet
is the type of containerization which may be employed from the
greenhouse directly to the ultimate display thereby reducing the
amount of handling required for potted plants in the distribution
of the same through the subject display cabinet 10. Turning now to
FIG. 11, it will be seen that the container 110 has a pair of
opposed tubular compartments 112 in which a plurality of pot rings
115 are provided. At one portion of the illustrative container 110
four large pot rings are shown, whereas at the other side three
large pot rings 115 are shown in combination with four small pot
rings 116. To illustrate the end usage, reference may be had to
FIG. 13 where it will be seen that a container 110 with eight
potted plants 114 is inserted at one end of the tray 111. Further
to be observed is the fact that the frame members 119 which define
the parameter of the tray 111 are L-shaped angle irons, with lower
legs sufficiently wide to support the edges of the container 110.
In the particular embodiment shown, it is contemplated that the
tray 111 will be approximately 48 inches long, and eight inches
wide. Therefore two 24-inch containers 110 will fill the tray 111.
As further noted, finger holes 120 are provided at the opposed
central portions of the container 110 so that it can be readily
lifted into the tray 111, and removed from the tray 111 in
accordance with the display techniques most suited for the
proprietor of the display cabinet 10.
The specific details of the container 110 are shown in FIG. 12
which is a blank for hand forming the same. There it will be
observed that the container blank, at its outer ends, has a pair of
opposed center walls 122 adjacent the top 124 which contain the
prepunched pot rings 115. Next to the top provision is made for the
sides 125 which, in turn, flank the bottom 126. It will be noted
that the height of the center walls 122 is coordinated with the
height of the sides 125 and width of the top members to provide a
drainage angle toward the junction of the center walls 122 of about
135.degree. with the vertical. In this manner irrigation overflow
is directed to the center of the trays 111.
Various lines of weakness are provided at the intersection between
the bottom, sides, tops, and center walls.
In operation, the container 110 is shipped flat to the
greenhouseman. He then folds the container 110 along the various
lines of weakness and, after the two center walls 122 are brought
in face-to-face relationship, the locking tabs 130 are then
actuated to provide an interlock between the two opposed center
walls 122 thereby completing the configuration of the container 110
as illustrated in FIGS. 11 and 13.
Additional features for safety are provided such as the safety shut
off switch 98, in the form of a wire bracket shown in the tub 28 at
the base of the display cabinet as illustrated in FIG. 1. At any
time a pot may drop out of position, a carton be dropped into the
tub, or the like, the tilting of the pivoted safety shut off 98
will deactivate the motor 70 for the entire display cabinet 10. In
addition, because the irrigation pump is an impeller type pump and
will burn out if run dry, a moisture sensing switch is provided in
the tub which turns on a warning light and shuts off the operation
of the motor 70 in the event the water in the irrigation system
becomes perilously low.
Variations are contemplated to provide further operating
tolerances. For example, the tray bracket 15 may be bent centrally
at its remote end to position the pivot pin away from the shrouds
21. Also the extremities of the track base 41 of the flange 65 are
curved centrally to provide relief for the chain 50 as it engages
the upper and lower sprockets 76, 77.
Although particular embodiments of the invention have been shown
and described in full here, there is no intention to thereby limit
the invention to the details of such embodiments. On the contrary,
the intention is to cover all modifications, alternatives,
embodiments, usages and equivalents of a display cabinet, track,
and controls as fall within the spirit and scope of the invention,
specification and the appended claims.
* * * * *