Display device and method

Biological material, such as a natural plant, is displayed within a transparent casing containing a preserving liquid which may consist at least partially of isopropyl alcohol. The material is attached either to a float or to a swivel anchor or to both so that, regardless of its weight, it is controllably suspended submerged in the liquid. The material is connected to the float or anchor, preferably by plastic threads substantially invisible in the liquid. The liquid in the casing is caused to move so that the biological material will rotate and afford a noticeable and aesthetic display. Music in conjunction with the rotation of the biological material may also be provided, as well as a light source for illuminating the display.

BACKGROUND OF THE INVENTION 
The present invention is directed to the provision of a device and method 
for displaying biological materials, such as plants, which are to be 
viewed in a preserved state. It is important for teachers, botanists, 
store owners, home owners, and others, to be able to display materials, 
such as rare plants, in a container without worrying about the 
preservation of the material, and to display the material in a fashionable 
and attractive way which will attract notice and interest. 
Display devices are known in the art for displaying articles needed to be 
preserved, in which a solution of alcohol and water is provided to 
preserve the material. However, such prior art units are relatively 
unattractive. Display devices are also known in other arts where, for 
example, lighting effects are to be achieved. 
U.S. Pat. No. 3,535,805 provides for display of various shaped birefringent 
sheet forms freely suspended in a rotating liquid. Light is directed onto 
the forms and polarizing filters are located on opposite sides of the 
forms and in the path of light. Means are provided to rotate the liquid, 
thus causing the suspended forms to move and to provide a moving image on 
a wall or screen. However, this arrangement would not be suitable for the 
display of biological materials. It is complicated and cumbersome and is 
for enjoyment only. It has no educational value. 
SUMMARY OF THE INVENTION 
It is, therefore, the primary object of the present invention to provide a 
device and method for displaying biological materials, such as plants, 
which display is attractive and structured to excite aesthetic interest. 
It is another object of the present invention to provide such a device that 
is easily viewed and which is relatively simple and inexpensive in 
construction. 
It is another object of the invention to make possible shipping and 
receiving of biological materials, such as plant or animal material, by 
using relatively inexpensive and easily obtainable isopropyl alcohol, 
(rubbing alcohol), as a preservative, thereby releasing said materials 
from many regulatory shipping or sales limitations applied to living, 
edible, or other organic items. 
A further object of the invention is that the clarity of view through the 
container is not adversely affected by any reaction with the fluid used, 
even over long-term years of contact. 
A further object is that the end product container, and its contents, (not 
including the external, motor-driven elements), have a very long, 
trouble-free life expectancy, (barring damage through misuse or 
mistreatment). 
It is a further object of the invention to emphasize the centuries-long 
mystique surrounding certain plants, or plant parts, with the relatively 
silent, unseen means of motion provided. 
It is still another object of the present invention to provide a device 
that is readily and easily handled and set up. 
To these ends, the display device and method of the present invention 
provide a transparent casing with a hollow interior, in which is provided 
a preserving liquid, such as isopropyl alcohol. The surface of the liquid 
is provided with one or more floats which float on the surface of the 
liquid. The floats are connected to the displayed biological material by 
at least one, but preferably more than one, very thin plastic threads 
which are substantially invisible in the liquid. When the liquid is 
stirred by a means at the bottom of the casing, the float moves and causes 
the attached materials to rotate in accordance with the movement of the 
liquid in the hollow interior of the casing. 
For displayed materials that would float, a rotatable anchor mounted to the 
bottom of the casing is used, connected to the displayed material by 
threads. 
For more exact arrangements of displayed materials, both floats and an 
anchor are used together, connected by threads, and the displayed material 
is attached to these threads. 
The stirring means may be, in the preferred form of the invention, a 
magnetized, plastic encased bar, freely rotating at the bottom of the 
casing, which bar is in turn rotated by a bar magnet rotatably driven by a 
motor housed in a stationary housing below the bottom surface of the 
casing. Alternatively, the stirring means may be a propeller within the 
casing adjacent the bottom thereof, which propeller is driven by a motor, 
connected to the propeller by a clutch mechanism. A further alternative 
stirring means comprises a circuit of tubing having one or more angled 
inlets and an outlet communicating with the interior of the casing and a 
motor driven pump connected in the tubing circuit so that the liquid 
circulates through the tubing. The liquid exiting from the angled inlet or 
inlets into the interior of the liquid-filled casing causes the liquid to 
rotate. 
The casing itself is made of a transparent plastic material, such as an 
acrylic plastic, while the bottom surface thereof and an optional top 
cover portion may be made of translucent material, so that when a lamp 
positioned above the top cover portion illuminates the top cover portion, 
the light is diffused through the interior of the casing, and light from a 
lamp positioned under the bottom surface would also be diffused through 
the interior of the casing. An enclosure or opaque linings are also 
provided around the circumferential portions of the casing adjacent the 
top and bottom thereof, as well as around the housing for the motor or 
pump, so that the moving parts and floats are not visible by a viewer. 
The housing for the motor means is also provided, in the preferred form of 
the invention, with a music source, such as a tape deck, and a rheostat 
that variably controls the rate of motor operation and, therefore, the 
speed of stirring. An electrical control switch means is provided that 
controls the operation of the motor means, the music source, and the light 
source.

DETAILED DESCRIPTION 
Referring now to the drawings, the display device for biological material 
is indicated generally by reference numeral 10. The display device of the 
present invention is made of a transparent casing 12, preferably 
cylindrical in shape, though other configurations may be provided. The 
casing 12 may have a top translucent cover portion 14, which is cemented 
to the rest of the container after a preserving liquid 18 and materials to 
be displayed are supplied in the hollow interior of the casing. A 
removable stopper may be used to remove or add liquid in the hollow 
interior. The liquid, which consists preferably of 40% isopropyl alcohol 
and 60% water and which acts as a preserving liquid for biological 
material, is filled within the casing, so as to define an air space 22 
between the top surface of the liquid and the top of the cover portion or 
any enclosure around the top portion of the casing. 
Floated upon the top surface of the liquid, is at least one float 26, which 
float stays upon the top surface of the liquid at all times. In FIG. 5, 
there are shown a plurality of such floats 26, connected by wires 43, 
which are arrayed in a circular configuration on the surface of the 
liquid. Each float 26 is provided with a pair of oppositely extending 
flanges 28, each of which is affixed to a connecting thread 30, which 
connecting threads 30 extend downwardly through the preserving liquid for 
attachment to the material to be displayed. The rotatable anchor 32 is of 
standard construction and well-known in the art, and is typical to one 
used in attaching rotating lures in fishing. Each thread 31 is affixed to 
the anchor via wires 34 extending from a respective side of the anchor, as 
clearly shown in FIG. 2, and each thread extends upward for attachment to 
the material to be displayed. 
The anchor 32 is preferably mounted upon a U-shaped shield 36, which shield 
is attached to the lower interior surface of the casing by projections 35, 
as shown in FIG. 4. The shield 36 protects, from view, a liquid stirring 
means mounted or resting adjacent the lower interior surface of the 
casing. The liquid stirring means is made up of, in one preferred form of 
the invention, a magnetized bar 38 encased within a plastic housing 40, 
the housing protecting the bar from contact with the liquid, and making 
silent rotation possible. 
In FIG. 2, there is shown the driving means for rotating the magnetized bar 
38, which driving means has a magnet 42 fixedly connected to a motor drive 
shaft 44 for rotation therewith, upon actuation of the motor 45. The motor 
and magnet are provided within a housing 46 attached to the lower outer 
surface of the casing 12. Appropriate electrical control means are also 
provided and include a rheostat 48 which controls the speed of the motor, 
and thereby the rate of stirring of the liquid in the casing. 
In FIG. 3, an alternative form of stirring the liquid is shown in which a 
propeller 50 is rotated by a motor 52 via clutch 54. A seal 55 is provided 
to prevent escape of the liquid from the interior of the casing. 
In FIG. 6, another preferred alternative form of stirring the liquid is 
shown in which a tubing circuit 90 has an angled inlet 92 and an outlet 94 
which communicate with the liquid 18 in the interior of the casing 12. The 
liquid 18 is propelled through the tubing circuit 90 by means of an 
in-line pump 96 driven by motor 98. The jet of liquid emerging from angled 
inlet 92 causes rotation of the liquid and consequently of the material 99 
to be displayed. As shown in FIG. 8, a filter 100 is positioned within the 
tubing circuit to filter out any extraneous material in the liquid. Also 
the pump and motor may be located remotely from the display itself to 
provide more silent operation. 
To provide the best viewing and aesthethic effect for the display device of 
the present invention, a gooseneck lamp 56 is provided having one end 56' 
connected to the housing 46, while the socket end is positioned above the 
top cover portion 14, so that the light from the lamp will illuminate the 
interior of the casing and, therefore, the materials presented for 
display. Further, within the housing 46, there is provided a music box 60 
having a music box drum 62 and musical tines 64, which musical tines are 
rotated by a gear motor 66. Alternatively, the music may be supplied via a 
tape playing unit 70 shown in FIG. 3. 
The lamp, music source, and liquid stirring means are all controlled via a 
switch box 72 with contacts 74, 76 and 78 for the three units, and one 
master control switch 80. 
To prevent viewing of the floats 26 and the driving structure within the 
housing 46, layers of opaque material are provided around the housing 46 
and around the circumferential portions of the top cover portion 14 and 
lower portion 14'. This opaque material 82 will shut out viewing of these 
elements by blocking the light from passing therethrough. 
The casing, floats and shield are all preferably made of plastic, with the 
casing being made of a clear plastic, such as acrylic. The music source 
and lamp are preferably coordinated with the rotation rate of the 
preserving liquid to afford a maximum effect. Typically, the casing wall 
is 1/8 inch in thickness or more, but too great a thickness is not 
desirable due to the distortion caused by the refraction of the light 
therethrough. The top cover portion, as well as the lower surface 14' of 
the casing may be translucent to provide unique lighting effects, as by 
using colored lights. 
While specific embodiments of the invention have been shown and described, 
it is to be understood that numerous changes and modifications may be made 
therein without departing from the scope and spirit of the invention as 
set out in the appended claims.