U.S. patent number 3,802,945 [Application Number 05/189,188] was granted by the patent office on 1974-04-09 for heat sensitive novelty device.
Invention is credited to Bill G. James.
United States Patent |
3,802,945 |
James |
April 9, 1974 |
HEAT SENSITIVE NOVELTY DEVICE
Abstract
A novelty device which utilizes the iridescing qualities of
liquid crystalline material to effect variations in colorations of
the device upon application of different temperatures.
Inventors: |
James; Bill G. (Redwood City,
CA) |
Family
ID: |
22696299 |
Appl.
No.: |
05/189,188 |
Filed: |
October 14, 1971 |
Current U.S.
Class: |
428/1.5; 349/199;
349/86; 63/32; 428/143; 428/192; 428/913; 40/448; 252/299.7;
428/188; 428/321.5 |
Current CPC
Class: |
B44F
1/14 (20130101); C09K 2323/05 (20200801); Y10S
428/913 (20130101); Y10T 428/249997 (20150401); Y10T
428/1059 (20150115); Y10T 428/24372 (20150115); Y10T
428/24744 (20150115); Y10T 428/24777 (20150115) |
Current International
Class: |
B44F
1/00 (20060101); B44F 1/14 (20060101); B44f
009/08 (); B01j 013/02 () |
Field of
Search: |
;252/408
;161/1,3.5,5,6,139,DIG.1,DIG.5,408-410 ;350/16LC ;23/23LC
;40/28C,28R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Ansher; Harold
Attorney, Agent or Firm: Leavitt; John J.
Claims
Having thus described my invention, what is claimed to be novel and
sought
1. As an article of manufacture, the combination comprising:
a. a transparent body;
b. a multiplicity of separately encapsulated droplets of a
crystalline liquid encapsulated in turn within said transparent
body, said droplets of separately encapsulated crystalline liquid
iridescing when subjected to varying temperatures to display
through said transparent body varying colors correlated to said
varying temperatures;
c. said transparent body being generally flat and having a
peripheral flange defining a recess within said body, said
multiplicity of separately encapsulated droplets of crystalline
liquid being deposited within said recess; and
d. means for sealing said recess whereby said encapsulated droplets
of crystalline liquid are sealed within the recess of said
transparent body.
2. The combination according to claim 1, in which said means
sealing said recess comprises a hardened mass cast in said recess
and adherent to said transparent body and to said multiplicity of
encapsulated droplets of
3. As an article of manufacture, the combination comprising:
a. a transparent body;
b. a multiplicity of separately encapsulated droplets of a
crystalline liquid encapsulated in turn within said transparent
body, said droplets of separately encapsulated crystalline liquid
iridescing when subjected to varying temperatures to display
through said transparent body varying colors correlated to said
varying temperatures;
c. said transparent body being generally flat and having a recess
therewithin, said encapsulated droplets of crystalline liquid being
disposed in self-supporting film form and deposited in said recess;
and
d. means superimposed over the film of encapsulated droplets of
crystalline
4. As an article of manufacture, the combination comprising:
a. a transparent body;
b. a multiplicity of separately encapsulated droplets of a
crystalline liquid encapsulated in turn within said transparent
body, said droplets of separately encapsulated crystalline liquid
iridescing when subjected to varying temperatures to display
through said transparent body varying colors correlated to said
varying temperatures;
c. said transparent body being tubular in form and having inner and
outer peripheral surfaces, said encapsulated droplets of
crystalline liquid being disposed in a layer adjacent the inner
peripheral surface of said tubular transparent body; and
d. means superimposed over the layer of encapsulated droplets of
crystalline liquid to seal the encapsulated droplets against the
inner
5. The combination according to claim 4, in which said means
superimposed over said layer of encapsulated droplets of
crystalline material comprises
6. As an article of manufacture, the combination comprising:
a. a transparent body;
b. a multiplicity of separately encapsulated droplets of a
crystalline liquid encapsulated in turn within said transparent
body, said droplets of separately encapsulated crystalline liquid
iridescing when subjected to varying temperatures to display
through said transparent body varying colors correlated to said
varying temperatures;
c. said transparent body comprising a flat sheet, said encapsulated
droplets of crystalline liquid are disposed in a layer on one
surface of said flat transparent sheet;
d. a flat opaque backing member superimposed coextensively over
said layer of encapsulated droplets;
e. means sealing marginal edge portions of said flat opaque backing
member to said flat transparent sheet to enclose and support said
encapsulated droplets between said flat transparent sheet and the
flat backing member;
f. a second layer of encapsulated droplets of crystalline liquid
disposed on the other side of said flat opaque backing member from
said first layer of encapsulated droplets of crystalline liquid;
and
g. a second transparent flat sheet disposed over said second layer
of encapsulated droplets of crystalline liquid material, said
marginal sealing means sealing marginal edges of both said
transparent sheets and
7. As an article of manufacture, the combination comprising:
a. a transparent body:
b. a multiplicity of separately encapsulated droplets of a
crystalline liquid encapsulated in turn within said transparent
body, said droplets of separately encapsulated crystalline liquid
iridescing when subjected to varying temperatures to display
through said transparent body varying colors correlated to said
varying temperatures;
c. said transparent body comprising a flat sheet, said encapsulated
droplets of crystalline liquid are disposed in a layer on one
surface of said flat transparent sheet;
d. a flat opaque backing member superimposed coextensively over
said layer of encapsulated droplets;
e. means sealing marginal edge portions of said flat opaque backing
member to said flat transparent sheet to enclose and support said
encapsulated droplets between said flat transparent sheet and the
flat backing member;
f. a second assembly including a transparent flat sheet, a layer of
encapsulated droplets of crystalline liquid, and a flat opaque
backing member mounted on said first assembly, said flat opaque
backing members lying in close juxtaposed relation; and
g. adhesive means securing said backing members to each other.
Description
BACKGROUND OF THE INVENTION
This invention relates to novelty devices fabricated from
transparent synthetic resinous materials in combination with
crystalline liquids such as those described in U.S. Pat. No.
3,524,726 and British Patents 1,138,590 and 1,161,039. These
patents each teach the characteristic of crystalline liquids of
various types, sensitive to various temperatures, to provide
iridescence in the crystalline liquid, such iridescence being
useful for several different purposes. As indicated in British
Patent 1,138,590, the usefulness of cholesteric mesomorphs in
temperature-sensitive systems has been severely limited due largely
to the fact that these crystalline liquids had not theretofore been
isolated. This patent teaches a method by which tiny droplets of
crystalline liquids, described in this patent as thermotropic
liquids, are isolated and protected as the cores of minute
transparent walled capsules, and the subsequent distribution of
these capsules in a thin film layer on a suitable substrate,
preferably sensitive to temperature variations. The wall of the
capsule which contains the liquid nucleus of crystalline liquid
material is transparent, i.e., transmits light incident upon and
reflected from the capsule contents. It has been found that many of
the disadvantages inherent in the use of these mesomorphic compound
film layers in the wet state disappear when used in the form of
tiny encapsulated droplets.
Although each of the tiny droplets is itself encapsulated, it has
been found through tests and experimentation that such encapsulated
droplets are still subject to destruction by contact with various
solvents, excessive heat, and physical abrasion. Accordingly, it is
one of the principal objects of the present invention either to
encapsulate a multiplicity of such encapsulated droplets, in strip
form for use in the ulitmate product, or to encapsulate a quantity
of the encapsulated droplets by the formation of the end product
itself.
It has been found that additional encapsulation of the encapsulated
droplets of crystaline material can be effected in such a way that
the finished product may be used for many different purposes, for
instance, as the setting for a ring, a pendant, a tie clasp, or a
tie pin. Accordingly, it is one of the objects of the invention to
encapsulate encapsulated droplets of a crystalline liquid in such a
way that variations in color in response to variations in
temperature will be visible through the body of transparent
material in which the encapsulated droplets are in turn
encapsulated.
The invention possesses other objects and features of advantage,
some of which with the foregoing, will be apparent from the
following description of the drawings. It is to be understood,
however, that the invention is not limited to the embodiments
illustrated and described, as it may be embodied in various forms
within the scope of the appended claims.
SUMMARY OF THE INVENTION
In terms of broad inclusion, the invention comprises the further
encapsulation of the encapsulated droplets of crystalline material
within a transparent body in such a way that the individually
encapsulated droplets of crystalline material will still be
responsive to variations in temperature to effect iridescence
thereof, and so that the iridescence so formed will be visible to
the observer through a transparent body which effectively seals the
encapsulated droplets of crystalline material from the ambient
atmosphere while permitting transmission of light therethrough.
To this end, in one aspect of the invention, a hollow body of
polyester, acrylic or other synthetic resinous transparent material
is formed so as to receive therewithin a quantity of the
encapsulated droplets of crystalline material, either in unoriented
bulk form, or in the form of oriented layers of such encapsulated
droplets of crystalline material arranged in strip form. In either
case, the quantity of encapsulated droplets of crystalline material
is sealed within the recess of the hollow transparent body by a
thin layer of polyester, acrylic or other resin, which may or may
not be opaque, or some other material, through which heat may be
readily transmitted for absorption by the crystalline material.
In another aspect of the invention, the individual beads or
droplets of encapsulated crystalline material are applied directly
to one side of a flat transparent sheet in the nature of a laminate
and to which transparent sheet they are sealed by any appropriate
means. In still another aspect of the invention, the flat
transparent sheet laminated as described, is further laminated with
a like structure so that both sides of the panel constitute
transparent surfaces, with the quantity of encapsulated crystalline
liquid material being sealed between the two panes of transparent
material.
In yet another embodiment of the invention, the transparent body is
tubular in conformation and the inner periphery of the tubular body
is used as a carrier for the layer or layers of crystalline liquid
material encapsulated in individual capsules. Such encapsulated
droplets may be sealed to the inner periphery of the transparent
tubular body by any appropriate means such as a second tube
concentrically disposed therewithin. The second tube may be either
opaque or transparent, or may be transparent with an opaque layer
on its outer periphery. In either case, the ends of the tubular
body are sealed so that the encapsulated crystalline liquid
material is isolated from the ambient atmosphere, yet may be
subjected to the transmission of heat thereto through the inner
periphery of the tubular body.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a composite view illustrating use of the invention as the
setting for a ring, a bracelet, a pendant, earrings, a tie clasp,
and a tie pin.
FIG. 2 is a vertical cross-sectional view through one embodiment of
the invention in which the encapsulated crystalline liquid droplets
are mounted on a suitable substrate and sealed within a hollow
formed in a transparent body.
FIG. 3 is a view similar to FIG. 2, but showing the encapsulated
crystalline liquid material filling the recess within a transparent
body in the absence of a substrate, and being sealed therein by an
appropriate means.
FIG. 4 is a cross-sectional view illustrating a second embodiment
in which the encapsulated crystalline liquid material is sealed on
one side of a flat transparent sheet.
FIG. 5 is a view similar to FIG. 4, but illustrating formation of a
double-faced panel, the separate faces of which are transparent,
with the encapsulated crystalline liquid material sealed between an
intermediary opaque backing member and each associated transparent
flat panel.
FIG. 6 is a vertical cross-sectional view similar to FIG. 4, but
showing a lamination of two such members in back-to-back
relationship so that opposite faces of the composite panel are
transparent.
FIG. 7 is a vertical cross-sectional view taken in the plane
indicated by the line 7--7 in FIG. 8, and illustrates an embodiment
of the invention in conjunction with a tubular transparent
body.
FIG. 8 is a vertical cross-sectional view taken along the axis of a
tubular transparent body, showing the encapsulated crystalline
liquid material forming a layer bonded to the inner peripheral
surface of the transparent tubular body.
FIG. 9 illustrates formation of a tubular or toroidal body in the
form of a bracelet with the encapsulated crystalline liquid
material being bonded to the inner periphery thereof and sealed so
as to be isolated from the ambient atmosphere, while placing the
encapsulated crystalline liquid material in close proximity to the
wearer's body so that body heat may be conducted to the material to
effect iridescence thereof.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In terms of greater detail, as explained in the two British patents
noted above, one of the problems in connection with mesomorphic
cholesterol derivatives in the form of crystalline liquid
materials, subject to iridescence through various colors of the
spectrum upon application of various temperatures, has been the
problem of finding some utility for such crystalline liquid
materials. Accordingly, it should be understood in connection with
the subject invention that no claim is herein made to the method of
effecting polymeric encapsulation of the individual crystalline
liquid droplets as disclosed and taught by British Patent
1,138,590, nor is any claim made herein to the use of such
cholesteric mesomorphic (liquid crystal) materials in an emulsion
of unencapsulated cholesteric mesomorphic material disbursed in a
matrix like polymeric binder material as taught in British Patent
1,161,039. Rather, it is the purpose of this invention to describe
and claim the utilization in novel combinations to produce novel
products of individually encapsulated droplets of
temperature-sensitive liquid crystalline material by further
encapsulating such encapsulated droplets within a transparent body
to form a novel product not heretofore available. It is within the
contemplation of this invention that such further encapsulation of
encapsulated crystalline liquid droplets may take the form of a
laminate in which the encapsulated crystalline liquid droplets are
deposited within any preformed hollow transparent body, or it may
be carried out by the direct admixture of encapsulated droplets of
crystalline liquid material with a liquid polyester, acrylic or
other transparent resin in liquid form so that the encapsulated
beads of crystalline liquid material are suspended within the
liquid phase of the polyester, acrylic or other resin and dispersed
throughout such transparent material.
Referring to FIG. 1, in the composite view there shown, to the left
thereof, there is illustrated the embodiment of the subject
invention as the setting 2 for a ring, or the visible portion 3 of
a bracelet. In another form, the invention may be embodied as the
setting 4 of a pendant to be worn around the neck, or as the
setting 6 for earrings. For men, it is feasible that the invention
may be embodied in such useful items as a tie pin 7 or a tie clasp
8.
Embodiment of the invention in different forms is exemplified in
FIGS. 2 through 9. Referring specifically to FIG. 2, there is there
shown a body 9 of transparent material, conveniently polyester,
acrylic or other resin, or a cast transparent material such as
glass. The body 9 is formed with a recess defined by the inner
surface 12 depressed below the level 13 of a peripheral flange 14.
Within the recess thus defined, there is deposited one or more
layers 16 of closely spaced encapsulated droplets of crystalline
liquid material conveniently caused to adhere to a substrate 17 by
any suitable means such as described in British Patent 1,138,590.
The substrate, for instance, may be a metal foil, or a non-metal
material on one surface of which the encapsulated droplets of
crystalline liquid material are caused to adhere to form a cohesive
film.
The film thus formed, may be a single layer of encapsulated
crystalline liquid droplets, or may be a plurality or multiplicity
of layers, with the encapsulated droplets of each of the layers
being responsive to different temperatures to produce different
color effects. In FIG. 2, there is illustrated a film 16 supported
on a substrate 17, with the film being two layers thick. As there
shown, the substrate-supported film of encapsulated crystalline
liquid droplets are sealed within the recess formed within the
transparent body 9 by a sealing member 18, preferably adherent to
the opposite side of the substrate 17 from the encapsulated
crystalline liquid droplets, and adherent also to the peripheral
edge 13 of the flange 14. In this way, the encapsulated crystalline
droplets are completely sealed from the ambient atmosphere, and yet
are in direct thermoconductive relationship to the substrate 17 and
the sealing member 18, so that any variation in temperature may be
conducted through the sealing member 18 and substrate 17 to produce
iridescence of the encapsulated crystalline liquid material. It
will, of course, be apparent that the sealing member 18 may be a
metallic or non-metallic member, the requirement being that it form
a substantially hermetic seal with the peripheral edge 13 of the
flange 14.
Referring to FIG. 3, there is there shown a structure similar to
the structure illustrated in FIG. 2, but in which the substrate 17
has been omitted. In this instance, the recess formed within the
body 9 is essentially filled with individually encapsulated
droplets of the crystalline liquid material which may be in layer
form as illustrated in FIG. 3, or which may be indiscriminately
oriented one to the other, (i.e., unoriented) within the recess and
then sealed therein by the sealing member 18, which again effects a
substantially hermetic seal around the peripheral edge 13 of the
flange 14 of the transparent body. The advantage of this
construction is that the encapsulated droplets of crystalline
liquid material may be purchased in bulk form and simply deposited
within the recess within the transparent body 9. It will, of
course, be obvious that the recess may be of any configuration so
that a variation of effects may be visible through the transparent
body within which the iridescible droplets of encapsulated
crystalline liquid material are sealed.
While FIGS. 2 and 3 are cross-sectional views showing the
relationship between the thickness of the transparent body 9 and
the disposition of the encapsulated droplets of crystalline liquid
material therewithin, it is apparent that the configuration of the
body itself in a direction perpendicular to FIGS. 2 and 3 may be of
any configuration. For instance, it is contemplated that such
transparent body may be ovate, circular, or rectangular, or any
other appropriate configuration consistent with the use to which
the device when completed will be applied.
It is important also to note that with respect to the conduction of
heat to the encapsulated droplets of crystalline liquid material,
such thermoconduction progresses more readily through the sealing
member 18 and substrate 17, as illustrated in FIG. 2, or directly
through the sealing member 18 into the encapsulated droplets
directly as indicated in FIG. 3. Transmission of heat energy
through the transparent body 9 is in general slower than
transmission of heat energy through the opposite side of the
device. In general, it may be said that the transparent body 9
functions to conduct light energy as opposed to heat energy. Thus,
while heat energy is utilized to effect iridescence of the
encapsulated crystalline liquid material, the transmission of light
through the body 9 is effective to permit such iridescence to be
visible to the naked eye and thus make this quality of iridescence
of practical use with respect to novelty devices of this type.
Referring to FIG. 4, the embodiment there shown utilizes a flat
transparent face plate or panel 21 against one surface 22 of which
a single or multiplicity of layers of encapsulated droplets 23 of a
crystalline liquid material are arranged, either indiscriminately
oriented, or in layer form as indicated. In this instance, the flat
transparent face panel 21 is provided with a peripheral sealing
band 24 hermetically sealed by any appropriate means to the edge 26
of the panel 21, and cooperating with a sealing member 27 disposed
substantially parallel to the transparent panel and effective to
confine the encapsulated droplets of crystalline liquid material in
tight contiguous relationship to the surface 22 of the transparent
panel.
As with the embodiments illustrated in FIGS. 2 and 3, the sealing
member 27 may be metallic or non-metallic, the criterion being that
it seal the encapsulated droplets of crystalline liquid material
from the ambient atmosphere. In most instances, it is preferable
that the sealing member 27 be metallic because of its advantageous
thermoconduction characteristics, and also because a metallic
sealing member is opaque. Thus, light transmitted through the
transparent panel and striking the iridescing droplets of
crystalline material will be reflected back through the transparent
panel for observation.
In this regard, the peripheral seal flange 24 may be transparent or
non-transparent, may be metal or non-metal, but should be
compatible in its thermal expansion and contraction characteristics
with the panel 21 and seal member 27, to both of which it is
secured. In a preferred method of fabrication, if the transparent
panel is one of the transparent synthetic resins, such as polyester
or acrylic resins, it is preferred that the seal flange 24 also be
fabricated from one of these materials. Where the transparent panel
is fabricated from glass, the seal flange 24 may likewise be
fabricated from glass, but if fabricated from metal, the nature of
the union between the edge 26 of the transparent panel and the
metallic seal flange 24, including the cross-sectional thickness of
the seal flange 24, should be gauged so that there is little or no
stress in the union between these two members due to thermal
expansion and contraction thereof.
The embodiment of the invention illustrated in FIG. 5 is an
expansion of the concept illustrated in FIG. 4. In this embodiment,
a second panel 28 has been added to the ordinarily exposed side of
the seal member 27', and an additional layer or layers or quantity
of indiscriminately oriented individually encapsulated droplets of
crystalline material 31 are disposed between the additional
transparent panel 28 and the member 27' in the recess 29 in the
recess formed therebetween. In this instance, the peripheral seal
flange 24' is extended to overlap the peripheral edge 32 of
transparent panel 28 so as to completely close the void or recess
between the two transparent panels 21 and 28.
It will thus be seen that in this construction the member 27' does
not act so much as a sealing member as it does a supporting or
backing member for the encapsulated droplets disposed on each side
thereof. Additionally, where the member 27' is opaque, as it would
be if fabricated from metal, the member 27' performs the function
of reflecting light passing through each of the transparent panels
21 and 28 so that the iridescing quality of the encapsulated
droplets of crystaline liquid material may be visible through each
of the transparent plates.
In this embodiment, it is preferable that the sealing flange 24' be
fabricated from a highly thermally conductive metallic material as
opposed to a non-metallic material having less thermal
conductivity, so that thermal energy absorbed by the sealing flange
24' may be conducted directly to the peripheral edge of the
intermediate member 27' and from this intermediate member to the
contiguous encapsulated droplets of crystalline liquid material. It
will thus be seen that iridescence through variations in color will
commence initially in the peripheral margins of the device and
gradually diffuse in vari-colored fashion through the entire
expanse of the panel.
FIG. 6 illustrates an embodiment which constitutes a lamination of
two of the units illustrated in FIG. 4. In the interest of brevity,
corresponding reference numbers have been applied to corresponding
elements of the combination. It should be noted however, that in
this instance, as illustrated in FIG. 6, the sealing flange 24 is
preferably fabricated from a metallic material which forms a close
bond with the peripheral edge of the intermediate sealing member 27
so that there may be an efficient conduction of thermal energy from
the peripheral flange 24 to the associated member 27. In this
embodiment, the member 27 in each instance performs a sealing
function, with the adjacent members 27 merely being secured one to
the other through an appropriate adhesive.
In the embodiment of the invention illustrated in FIGS. 7 and 8,
the transparent body 36 constitutes a tubular member, preferably
cylindrical in form, and one or more layers 37 of separately
encapsulated droplets of crystalline liquid material are disposed
contiguous to the inner peripheral surface 38 of the transparent
tubular body. As previously discussed, the encapsulated droplets
may be in film form, supported by an appropriate backing member 39,
which may be a flexible non-metallic synthetic resinous material
such as a polyester or acrylic resin, or a metallic foil on which
the encapsulated droplets of crystalline liquid material are
deposited to form a film.
This film may be caused to adhere to the inner periphery of the
tubular transparent body 36 so that in effect the layer or layers
of encapsulated droplets, together with the foil 39 on which they
are supported, constitute a lamination bonded to the inner
periphery of the tubular transparent body. In another aspect of
this invention, the member 39 may be additionally supported by
inserting a support member 41 therewithin. The support member 41
may be transparent or non-transparent, may be metallic or
non-metallic and where transparent, it is preferable that the
member 39 be opaque so as to increase the efficiency with which the
light passing through the body 36 and striking the iridescing
encapsulated droplets of crystalline liquid material, is reflected
back through the transparent tubular body for observation.
As in the previous embodiments, the encapsulated droplets of
crystalline liquid material are preferably isolated from the
ambient by an appropriate seal member 42 secured across the end
edge 43 of the tubular transparent body. Additional support is
given the sealing member 42 by a reinforcing member 44. Preferably,
the sealing member 42 is also sealingly engaged to the end edge 46
of the inner tubular support member 41 where such support member is
used. In terms of utility, such a tubular construction may be
useful in a water system, for instance, where it is desirable to
monitor the temperature of the water.
Thus, where the inner tubular support member 41 constitutes a hot
water conduit, heat from this member will be conducted directly to
the foil 39 and thence to the iridescible encapsulated droplets of
crystalline liquid material. The degree of thermal energy thus
conducted will be apparent to an observer, the color seen by the
observer being an indication of the temperature of the liquid
passing through the inner conduit 41. In this respect, it will of
course be understood, different compositions of crystalline liquid
material will produce different colors at various temperatures so
that any desirable or convenient combination of colors may be
utilized to signify different conditions or temperatures of the
water passing through the inner conduit 41.
In another aspect of this invention, and relating primarily to
novelty devices as opposed to industrial utilization of the
invention, FIG. 9 illustrates a bracelet construction designated
generally by the numeral 3, to be worn in the manner indicated in
FIG. 1. In this construction, the transparent body 51 is generally
toroidal in configuration, the outer peripheral surface 52 being
generally circular or ovate in cross section so as to produce a
lens effect to magnify the iridescing quality of the separately
encapsulated droplets of a crystalline liquid material 53 confined
within a recess 54 formed in the inner periphery of the toroidal
body.
As indicated heretofore, the encapsulated droplets of crystalline
liquid material may be appropriately mounted on a suitable film or
foil 56, which may be cut in strip form so as to be accommodated
within the recess 54 as shown. For additional support, and to
provide direct conduction of thermal energy from the wrist of the
person wearing the bracelet, and additionally to render the inner
periphery of the bracelet smooth and contribute to the esthetic
appeal of the bracelet, a support band 57 is preferably disposed
concentrically within the inner periphery of the support film or
foil 56 and caused to adhere at its lateral edges to the associated
sides of the recess adjacent the inner periphery of the bracelet.
In this way, the encapsulated droplets of crystalline material lie
confined and hermetically isolated from the ambient atmosphere
within the transparent body of the bracelet, where they may be
easily subjected to variations in thermal energy so as to produce
variations in color responsive to such variations in
temperature.
From the foregoing, it will be apparent that the invention may be
embodied in many different forms to provide devices of both novelty
and industrial application. It should especially be noted that
shapes do not limit the uses to which the encapsulated droplets of
crystalline liquid material may be put, the concept of further
encapsulation of the encapsulated droplets of crystalline material
being applicable in many different embodiments within the scope of
the appended claims.
* * * * *