U.S. patent number 3,740,142 [Application Number 05/046,724] was granted by the patent office on 1973-06-19 for apparatus for discriminating and/or identifying jewels.
This patent grant is currently assigned to Fumio Suruki, Yoshihiko Takubo. Invention is credited to Yoshihiko Takubo.
United States Patent |
3,740,142 |
Takubo |
June 19, 1973 |
APPARATUS FOR DISCRIMINATING AND/OR IDENTIFYING JEWELS
Abstract
A novel method for testing materials such as jewels having
optical properties such as transparency, reflection, and
refraction, in commercial basis, and an apparatus for practicing
the method are proposed. The apparatus comprises an enclosure
forming a dark room in which the material such as a jewel is
tested, means for holding and positioning the material at a
selected position inside of the dark room, a beam of
electromagnetic radiation such as light is directed onto the
material preferably from the culet side of the material, and a
photographic material, preferably placed on the crown side thereof,
for recording an image of the electromagnetic radiation
distribution of the beam passed through on the material.
Inventors: |
Takubo; Yoshihiko (Tokyo,
JA) |
Assignee: |
Suruki; Fumio (Tokyo,
JA)
Takubo; Yoshihiko (Tokyo, JA)
|
Family
ID: |
13717397 |
Appl.
No.: |
05/046,724 |
Filed: |
June 16, 1970 |
Foreign Application Priority Data
|
|
|
|
|
Aug 24, 1969 [JA] |
|
|
44/80406 |
|
Current U.S.
Class: |
356/30;
356/239.1; 356/302 |
Current CPC
Class: |
G01N
33/381 (20130101); G01N 21/87 (20130101); G03B
15/00 (20130101) |
Current International
Class: |
G01N
21/87 (20060101); G01N 33/38 (20060101); G03B
15/00 (20060101); G01n 021/00 () |
Field of
Search: |
;356/30,76,31 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Wibert; Ronald L.
Assistant Examiner: Godwin; Paul K.
Claims
What is claimed is:
1. An apparatus for discriminating and identifying materials having
optical properties, which comprises:
a light-proof enclosure having side walls and a bottom portion and
having located therein, holding means for holding and positioning
the material, said holding means including a transparent plate
supported by the side walls of the lightproof enclosure:
a light source, a beam of which is directed onto the material to be
tested;
holding means for holding a photographic material along the side
walls of the light-proof enclosure;
and a photographic material for recording an image of the spectral
light distribution of the beam passed through the material, held in
place along the walls of the light-proof enclosure by said holding
means and disposed along the bottom of the light-proof
enclosure.
2. An apparatus according to claim 1 wherein the photographic
material is placed near the holding means for holding and
positioning the material.
3. An apparatus according to claim 1 wherein said holding means for
holding and positioning the material to be tested is adjustably
positioned within said enclosure to permit adjustment in distance
between said material and the photographic material for
recording.
4. An apparatus according to claim 3 and further including control
means positioned outside said enclosure and connected to said
holding means for adjusting said holding means from outside said
enclosure.
5. An apparatus according to claim 3 wherein a shining time of the
light source can be adjusted from the outside of the enclosure,
said shining time being instantaneously a time of exposure to
record a specific character of the spectral light passed through
the jewel on a photographic material.
6. An apparatus according to claim 5 wherein the intensity of the
light source can be varied from outside of the enclosure.
Description
BACKGROUND OF THE INVENTION
This invention relates to a method and device for discriminating
and identifying materials having optical properties such as
jewels.
Heretofore, the discrimination or identification of the materials
having optical properties such as jewels has been carried out only
by skilled craftsmen who have long experience in the art. However,
the method relying on the craftsman's experiences cannot exhibit
any visible ground for the judgement, and, for this reason, the
decision cannot be persuasive to all of the concerned
personnel.
Of course, it has also been known that the materials having optical
properties such as jewels can be discriminated or identified
employing crystallographical techniques. For instance, the material
such as jewels may be tested employing X-rays, ultraviolet rays, or
polarized light, and the reflected, refracted, or dispersed rays or
visible light may be recorded on a photographic substance or film
for the subsequent inspection. However, such a procedure is carried
out rather for determining the kind of the materials or for
determining the crystallographical structure, and the method and
devices required for practicing such a procedure are too much
complicated and costly for simply discriminating or identifying the
material in the commercial basis.
SUMMARY OF THE INVENTION
Therefore, the primary object of the present invention is to
provide a novel method and device for testing materials having
optical properties such as jewels for the purpose of mostly
discrimination and identification of the materials in a commercial
basis.
Another object of the present invention is to provide a novel
method and device for testing materials having optical properties
without relying on the craftman's skill or experiences.
Still another object of the present invention is to provide a novel
method and device for testing materials having optical properties
such as transparency, reflection, and refraction without requiring
any elaborate procedure or devices.
Still another object of the present invention is to provide a novel
method and device for testing materials such as jewels whereby a
visible record indicative of any slight degree of difference
inherent in the material is obtained for preservation and
subsequent comparison.
A further object of the present invention is to provide a novel
method and device for testing materials such as jewels wherein the
material to be tested can be instantaneously set to the position,
and a record can be obtained even if the material is mounted on a
ring or the like ornament.
A yet further object of the present invention is to provide a novel
apparatus for testing materials such as jewels, wherein all of the
required components are combined in one unit, whereby a visible
record of the material can be obtained instantaneously.
These and other objects of the present invention can be achieved by
a novel method for testing materials such as jewel having optical
properties such as transparency, reflection, and refraction, which
method comprises shining a beam of electromagnetic radiation,
preferably of light rays in a range of wavelength reflectable and
refractable by the material, onto the material such as a jewel; and
recording, on a photographic material, an image of distribution of
the electromagnetic radiation beam passed through on the
material.
Preferably, the photographic material such as a photographic film
may be placed on the crown side of the jewel having a plurality of
facets, and the electromagnetic radiation beam such as light rays
may be shone on the jewel from the culet side thereof.
Preferably, the photographic material is a Polaroid film which can
be instantaneously developed and printed, and the electromagnetic
radiation beam is obtained from a miniature lamp of a known
characteristic.
In another aspect of the invention, the above described objects are
also achieved by a novel device for testing materials such as
jewels having a plurality of facets, the device comprising an
enclosure forming a dark room, means for holding and positioning
the material inside of said enclosure, a source of electromagnetic
radiation beam directed onto the material to be tested, and a
photographic material for recording an image of the electromagnetic
radiation distribution of the beam passed through the material.
Preferably, the above mentioned means for holding and positioning
the material to be tested is made adjustable as to the position
from the outside of the enclosure.
Alternatively, the above mentioned means for holding and
positioning the material is made into a fixed type, and a separate
focusing means controllable from the outside of the enclosure may
be provided inside of the enclosure.
Preferably, a shutter system for rendering an adequate exposure
time on the photographic material be provided inside of the
enclosure, and a shutter button may be provided on the front panel
of the enclosure.
Likewise as in the method according to the present invention, the
photographic material such as a photographic film is preferably
placed on the crown side of the jewel having a plurality of facets,
and the electromagnetic radiation beam is preferably shone onto the
jewel from the culet side thereof.
Preferably, the above described beam electromagnetic radiation
source may be made in the form of a miniaturized lamp attached on
an end of the positioning device for the material in a manner
aligning with the material, so that the light beam from the
miniature lamp is shone on the jewel.
The nature, principle, and utility of the invention will be better
understood from the following description with respect to preferred
embodiments thereof, when read in conjunction with the accompanying
drawing, wherein like parts are designated by like reference
numerals.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a schematic diagram to be employed for explaining the
fundamental principle of the present invention;
FIG. 2 is a diagram showing a distribution of reflected or
refracted light beams obtained by a device schematically indicated
in FIG. 1;
FIG. 3 is another schematic diagram to be employed for explaining
the fundamental principle of the present invention;
FIG. 4 is also a diagram showing another distribution of reflected
or refracted light beams obtained by a device schematically
indicated in FIG. 3;
FIG. 5 is a perspective view of an apparatus which constitutes an
embodiment of the present invention;
FIG. 6 is also a perspective view showing the same apparatus
illustrated in FIG. 5, which is partly frustrated so that the
inside components can be seen more clearly;
FIG. 7 is another perspective view showing a construction of a
jewel positioning head employed in the apparatus shown in FIGS. 5
and 6;
FIG. 8 is a partial sectional view showing an apparatus which
constitutes another embodiment of the present invention; and
FIG. 9 is a sectional view rather schematically showing another
construction of the jewel holding and positioning device which also
may be employed in an apparatus according to the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring now to FIG. 1 showing an example of a device for
practicing the method according to the present invention for the
purpose of explanation of the fundamental principle of the
invention, there is indicated a cylindrical body 1 having a top
cover 2 and a bottom plate 3 so that a dark room is thereby formed.
Inside of the cylindrical body 1, a transparent plate 4 having a
glassy surface to mount a jewel A is provided. A source of an
electromagnetic radiation, which is a visible light in this
example, is formed into a unit 5 including a lamp 6, a condenser
lens 7, and a small hole 8 for passing a light beam.
The light source 5 is provided through the top cover 2 so that a
light beam F-1 is shone onto the jewel A fixed on a jewel mounting
piece 9 placed on the transparent plate 4. A photographic material
such as a film is provided on the inside surface of the cylindrical
body 1, and the light rays reflected or refracted from the jewel A
are projected on the film 10 as indicated by arrows F-2 through
F-7. Thus, a plurality of images for the reflected or refracted
light rays through the jewel A are formed on the film 10. If the
film 10 is thereafter withdrawn and developed, images such as
illustrated in FIG. 2 are fixed on the film 10, so that the film
may be preserved for the subsequent comparison for the
identification or discrimination of the jewel.
In the above description, although the jewel A has been described
as being shone from the crown side thereof, it is found rather
preferable that the jewel is shone from the culet side, and such an
example is shown in FIG. 3.
In FIG. 3, all of the members such as the cylindrical dark room 1,
a transparent plate 4 having a glassy surface, and a light source 5
having a lamp 6, a condenser lens 7, and a small hole 8 are quite
similar to those indicated in FIG. 1. However, in this example of
the device for practicing the method according to the present
invention, the jewel A is placed directly on the transparent plate
4, with the crown directed downward contacting with the transparent
plate 4, so that the light beam F-1 passing through the hole 8 of
the light source unit 5 is shone on the culet side of the jewel A.
Furthermore, the photographic materials such as films are attached
not only on the inside surface of the cylindrical body 1 but also
on the inside surface of the bottom plate 3.
When the images fixed on the film 10 in FIG. 2 are compared with
the images fixed on the films 10 and 10a in FIG. 4, it is found
that more detailed features characterizing the specific jewel can
be seen in the films 10 and 10a in FIG. 4 and more specifically in
the film 10a.
As a result of the findings, in all of the hereinafter described
examples of the jewel identifying or discriminating devices for
practicing the method according to the present invention in more
practicable form or manner, the light beam is preferably, but not
limited thereto, shone on the jewel from the culet side of the
jewel. Furthermore, although in the above described principle or
fundamental concept of the present invention, an electromagnetic
radiation, in the form of visible light rays, has been employed for
the simplicity of the explanation, another form of electromagnetic
radiation such as infrared rays or ultraviolet rays may also be
employed for a specific field of application, so far as the rays
may be reflected or refracted by the facets of the jewels. Such an
application has been found exclusively useful in discrimination or
identification of the jewels having, for instance, a fluorescent or
phosphorescent nature, or when a jewel having a spectrographic
singularity is discriminated employing the reflected or refracted
light beam in a specific range of the wave length.
Furthermore, although the fundamental principle or concept of the
present invention has been explained with respect to simplified
examples of the devices which are employed for practicing the
concept, it would be apparent that the invention is not limited to
those devices, but it resides in the method of discriminating and
identifying materials having optical properties such as jewels
comprising the procedures of shining a beam of electromagnetic
radiation onto the material, and recording on a photographic
material, an image of the electromagnetic radiation showing the
distribution of the electromagnetic radiation reflected or
refracted from the material to be tested, and also in the
constructions of the devices for practicing the method, which will
be described hereinbelow with reference to FIGS. 5 through 9.
In a device shown in FIGS. 5 and 6, which constitutes a preferred
embodiment of the present invention, there is provided an enclosure
or casing generally indicated by a reference numeral 10. On the
front panel 11 of the casing 10, a position adjusting knob 13 for
the material such as a jewel, a voltage adjusting knob 14 for the
light source, a power switch 15 for energizing the lighting system,
an indicating light 16 for the energization of the system, and a
shutter push-button 17 for photographing the image reflected or
refracted from the material to be tested are provided. On the
rearward portion 12 from the above described front panel 11 of the
casing 10, a recessed portion generally indicated by a numeral 18
is provided. A viewer having a hood 20 and a focusing glass 21 as
shown in FIG. 6 or a pack of photographic films (not shown) may be
inserted in the recessed portion 18, and may be fixed in the
position by means of snapping projections 19. Otherwise, the
rearward portion 12 of the casing 10 may also be constructed in
such a manner that it adapts to receive the viewer having a hood 20
and a focusing glass 21 and/or a package of the Polaroid films
which may be fixed in the position by means of a stopper 22 as
shown in FIG. 6.
Inside of the enclosure or casing 10, there is provided a jewel
positioning device comprising, for instance, a positioning arm 30,
a head 31, and a screw-threaded shaft 32. The above-mentioned jewel
position adjusting knob 13 is attached on one end of the
screw-threaded shaft 32, the other end of which is received
rotatably in a recessed pad 33 fixed to the bottom plate of the
casing 10. The screw threaded on the shaft 32 engages the female
screw threaded inside of a hole provided at one end of the jewel
position adjusting arm 30, so that when the knob 13 is rotated in
either of the directions, the entirety of the jewel positioning
device is raised or lowered relative to the focusing glass or the
surface of the photographing film.
At the other end of the jewel positioning arm 30, a jewel
positioning head 31 is detachably fixed, for instance, by means of
machine screws (not shown). The jewel positioning head 31 may take
various forms or construction in accordance with the requirements
and ornaments bearing the jewel. Accordingly, it should be
understood that the positioning head 31 shown in FIG. 6 is a
typical one adapted for mounting a ring 2 embedded by the jewel 1
and having a hole through which a light beam may pass through the
ring to the culet side of the jewel 1. A miniature lamp 35 is
included inside of the jewel positioning head 31 at a position
aligning the central axis of the jewel 1 embedded in the ring
2.
In FIG. 7, the construction of the jewel positioning head generally
indicated by the numeral 31 is indicated in more detail. In this
example, the jewel positioning head 31 comprises, beside of the
main body, a ring supporting member 36 having a ring stopper 36a,
and a machine screw having a knob 37 for adjusting the position of
the ring supporting member 36 to suit to the size of the ring 2
bearing the jewel 1. The above mentioned miniature lamp 35 is
included inside of a chamber (not shown) formed at one end of the
jewel positioning head 31, and is covered by a covering piece 34
having a central hole 34a and detachably mounted on the positioning
head 31. The central hole 34a of the covering piece 34 is so formed
that it may be easily abutted in alignment with the aforementioned
hole provided through the ring 2 just under the position wherein
the jewel 1 is embedded or supported.
An electric power system including a voltage adjusting means is
included in the device for lighting the above mentioned miniature
lamp 35, and energized or deenergized by means of the above
described power switch 15, with such a condition being indicated by
the indicator light 16, both mounted on the front panel 11 of the
casing 10. The voltage adjusting means may be constructed in the
form of a transformer T included inside of the casing as shown in
FIG. 6, and the output voltage of the transformer may be adjusted
by the voltage adjusting knob 14.
Furthermore, the device may also include a shutter system rendering
an adequate period of exposure on the photographic material such as
a film, although such shutter system is not indicated in the
drawings because it constitutes no part of the present invention,
and the operation of the shutter system may be controlled by the
shutter button 17 provided on the front panel 11 of the casing 10.
Of course, the shutter system may take a form of an electric timer
for supplying a pulse current to the lamp 35 if an adequate
consideration is paid as to the intensity of the current and the
period for the duration of the current.
In FIG. 8, there is indicated a cross-sectional view of a device
for discriminating and identifying materials having optical
properties such as jewels, which constitutes another embodiment of
the present invention. Although merely a part of the device
required for the explanation of the difference of this embodiment
to the above mentioned embodiment is indicated in the drawing, it
should be noted that other members not indicated in the drawing are
all similar to those described in the embodiment of FIGS. 5 and
6.
In this embodiment of the invention, the focusing of the image of
the jewel on the focusing glass 21 or on the surface of the
photographic film (not shown) is achieved by a focusing lens system
including focusing lenses 40, 40 and a lens supporting arm 41 which
is engaging with the screw threaded shaft 32 controlled by a knob
13, acting at this time as a focusing knob. Because of the
provision of a member not shown in the drawing, the lateral
movement of the focusing arm 41 is prevented, and the focusing
lenses 40, 40 can be moved only in the upward or downward
direction, so that a sharp image of the jewel can be obtained on
the focusing plane despite of the jewel 1 supported by a ring 2 is
fixedly mounted on a jewel mounting unit.
More specifically, the jewel mounting unit has a jewel mounting
main body 50 the lower end of which is detachably fixed to a
mounting socket 51. The upper end of the main body 50 is preferably
bent at right-angle, as indicated in FIG. 8, and a lamp
accommodating chamber having a cover 53 is provided at an end
portion thus bent perpendicularly. The cover 53 is detachably
mounted over the lamp 35 mounted on a socket provided at the bottom
of the chamber, and a chamfered or a stepped hole 53a is cut
through the cover 53. A rubber ring 54 having a central hole of a
substantially equivalent diameter to the narrower diameter of the
stepped hole 53a is inserted into the larger diameter portion of
the stepped hole 53a, so that a resilient touch against the inside
surface of the ring 2 may be obtained. On an intermediate portion
of the jewel mounting main body 50, a ring supporting pad 52 is
slidably supported, so that the position of the pad 52 may be
adjusted for a desired size of the ring 2 by manipulating a
projected end portion 52a of the ring supporting pad 52. In this
case also, the lamp 35 and the hole through the cover 53 and the
rubber ring 54 are aligned with a hole through the ring 2 just
under the jewel 1, so that a light beam may be projected to the
culet side of the jewel 1.
Still another embodiment of the jewel positioning device which is
employable in the device for identifying or discriminating the jewl
is indicated in FIG. 9 rather schematically and as a sectional view
taken along the axis of the assembly. This jewel positioning device
is intended for positioning the jewel 1 which is not mounted on a
ring.
Since, in this case, the jewel must be clamped firmly and held
accurately in its position, a jewel clamping unit generally
designated by a numeral 60 is employed. The jewel clamping unit 60
comprises a required number of claws 61 for holding the jewel 1, a
cylindrical member 62 joined to the lower ends of the claws 61 and
a mounting screw thread is cut on the lower surface thereof, a
sleeve 63 slipped over the cylindrical member 62 and having stepped
inside holes of larger and a smaller diameter, and a coiled spring
64 slipped over the cylindrical member 62 so that the upper end of
the coiled spring 64 abuts the stepped annular surface inside of
the sleeve 63.
The screw threaded portion near the lower end of the cylindrical
member 62 is driven into a mating hole provided in a mounting
member 65 of the jewel clamping unit which is detachably coupled to
a hoisting and descending member 66. The hoisting and descending
member 66 may have any cross-sectional configuration, but
preferably rectangular, and a collar 66a for limiting the upward
movement thereof is provided on the surface at an intermediate
position along the length. On one side surface of the member 66
below the collar 66a, a rack 66b and a pinion 67 are provided. The
hoisting and descending member 66 is passed through a mating
opening provided through a fixed member 70. A miniature lamp 35 is
accommodated in the cylindrical member 62 and an electrical power
system is connected to the lamp 35.
As is apparent from the above described construction, the jewel 1
may firstly be inserted between the claws 61, 61 of the jewel
clamping unit 60 when the sleeve 63 is pushed down against the
resilience of the coiled spring 64 and the claws 61, 61 are
separated outwardly by their own resilience. By releasing the
sleeve 63 thereafter, the jewel 1 is firmly clamped by the claws
61, 61 which are compressed by means of the sleeve 63 pushed
upwards under the resilience of the coiled spring 64.
After the jewel 1 is firmly clamped as described above, the
hoisting and descending member 66 is hoisted or descended under the
action of the pinion 67 and the rack 66b, the pinion 67 being
rotated through any of the conventional means from the jewel
positioning knob (not shown), so that a sharp image of the
reflected or refracted light spots may be obtained on the focusing
plane 21.
Although the present invention has been described in connection
with preferred embodiments of the invention, it will be apparent to
those skilled in the art that various modifications and alterations
be carried out without departing the spirit and scope of the
present invention.
For instance, the arrangement of the jewel positioning or focusing
knob, the voltage adjusting knob, or the like provided on the front
panel of the device may be utterly changed from those indicated and
described in this invention, or even the front panel itself may be
eliminated, and the required controlling knobs or the like may be
arranged on a side panel or any other suitable positions.
Furthermore, although the jewel positioning unit has been described
as merely adjustable of the vertical position of the jewel, it may
also be modified so that the jewel may be turned around of the axis
at a desired angle.
In consideration of the above described facts, the true spirit and
the scope of the present invention are defined as follows.
* * * * *