Optics: image projectors – Picture carrier
Reexamination Certificate
2001-03-16
2003-04-15
Gray, David M. (Department: 2851)
Optics: image projectors
Picture carrier
C353S007000, C359S473000
Reexamination Certificate
active
06547403
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stereo slide mount and a stereo slide viewer. More particularly, the invention relates to a stereo slide mount in which the film pitch between a right film holder and a left film holder slidably mounted in the stereo slide mount is allowed to be adjusted in either a direction of approach or a direction of separation, and to a stereo slide viewer.
2. Prior Art
The present applicant has already proposed a stereo slide mount and a stereo slide view of this kind in an application (Japanese Patent Application No 273315/1999) which will now be described with reference to FIGS.
8
(
a-g
),
9
-
11
,
12
(
a,b
),
13
and
14
.
FIGS.
8
(
a-g
) illustrates a cover frame
1
, two pieces of right and left film holders
2
,
2
, and a base frame
3
for constituting a stereo slide mount, that are all molded by injecting a resin, and wherein FIG.
8
(
a
) illustrates a back surface of the cover frame
1
that comes into contact with the base frame
3
.
In the base frame
3
and the cover frame
1
are formed right and left windows
5
L,
5
R and
4
L,
4
R. Windows
6
,
6
are also formed in the two pieces of right and left film holders
2
,
2
that are sandwiched by the base frame
3
and the cover frame
1
.
A guide groove
3
b
extending toward the right and left is formed in an intermediate portion between an upper edge and a lower edge of the base frame
3
shown in FIGS.
8
(
f
) and
8
(
g
). The vertical width of the bottom surface of the guide groove
3
B is wider than the gap between the upper and lower edges
3
a
,
3
a
of the base frame
3
thereby to form a dovetail groove, and plural pins
7
are stud on the upper end lower edges
3
a.
Pin holes
8
are perforated in both the upper and lower edges of the cover frame
1
so as to be fitted to the pins
7
of the base frame
3
. When the cover frame
1
is placed on the base frame
3
in a manner that the pins
7
are fitted to the pin holes
8
, then, the base frame
3
and the cover frame
1
are coupled together.
The base frame
3
in which the dovetail groove is formed constitutes a fitting pair together with the film holders
2
and
2
of a trapezoidal shape in cross section shown in FIG.
8
(
e
), enabling the film holders
2
and
2
fitted into the base frame
3
to be slid in the right-and-left direction.
Stopper pins
9
are provided on the inner sides of the right and left windows
5
R and
5
L of the base frame
3
. When two pieces of the right and left film holder
2
are slid in a direction to approach each other until they come in contact with the stopper pins
9
then, the pitch between the windows
6
and
6
of the two pieces of the film holders
2
is determined to be the shortest in a range of adjusting the film pitch.
Referring next to FIGS.
8
(
c
) and
8
(
d
), the two pieces of right and left film holders
2
have a pentagonal shape with their vertical sides on one side protruding in a V-shape. The film holders
2
are mounted on the base frame
3
with their V-shaped vertical sides being opposed to each other. Film-positioning pins
10
are stud on the upper and lower portions of the windows
6
and
6
of the film holders
2
to serve as engaging portions for positioning the right and left two films. When the perforations of the films are brought into engagement with the film-positioning pins
10
, the pictures on the films are brought into agreement with the windows
6
and
6
of the film holders
2
.
Recesses
11
are formed in the back surface of the cover frame
1
to avoid interference with the film-positioning pins
10
of the film holders
2
. The film holders
2
on the base frame
3
are allowed to freely slide in the right-and-left direction within a predetermined range in a state where the cover frame
1
is mounted on the base frame
3
.
FIG. 9
illustrates a stereo slide viewer
12
, wherein a pair of right and left eyepieces
14
R and
14
L are arranged in front of a groove-shaped slide mount holder unit
13
, and an illumination bulb
15
and an arcuate reflector
16
are arranged at the back of the slide mount holder unit
13
so that, when the illumination bulb
15
is turned on, the back surface of the slide mount holder unit
13
is irradiated with light due to the reflector
16
. Further, eyepiece holders
17
R and
17
L of the right and left eyepieces
14
R and
14
L, are so constructed that the distance between the optical axes can be adjusted and the focal points in the direction of the optical axis can be adjusted, too.
A leaf spring
13
b
is provided on a front wall surface
13
a
in the slide mount holder unit
13
. The stereo slide mount in the slide mount holder unit
13
is positioned being press-contacted to a rear wall surface
13
c
on the side of the eyepieces
14
R and
14
L due to the leaf spring
13
b.
Further, a film pitch-adjusting device
18
is disposed between the right and left eyepieces
14
R and
14
L. The film pitch-adjusting device
18
works to adjust the gap between the right and left film holders
2
and
2
of the stereo slide mount by turning helical cams
19
R and
19
L.
Referring to
FIG. 10
, the pair of right and left helical cams
19
R and
19
L have a D-shape in cross section with their outer peripheral surfaces of disks being partly cut straight. Referring to
FIG. 11
, the helical cams
19
R and
19
L have helicoidal cam surfaces
20
R and
20
L on the outer side surfaces thereof, the right cam surface
20
R and the left cam surface
20
L being symmetrical to each other.
The pair of right and left helical cams
19
R and
19
L are fitted to a cam shaft
22
holding a spur gear
21
therebetween. The right and left ends of the cam shaft
22
are supported by bracket bearings
23
shown in
FIG. 10
provided in the viewer frame of the stereo slide viewer
12
. A pinion shaft
24
is arranged under the cam shaft
22
in parallel therewith, and a pinion
25
fitted to the pinion shaft
24
is in mesh with the spur gear
21
. When a knob
26
shown in
FIG. 9
attached to an end of the pinion shaft
24
is turned, the helical cams
19
R and
19
L rotate.
FIG. 12
illustrates a collimation pattern mask
27
which enables an optimum pitch to be easily recognized in adjusting the film pitch of the stereo slide mount by using the stereo slide viewer
12
. The collimation pattern mask
27
has a shape similar to the cover frame
1
, and portions other than the right and left transparent windows
28
R and
28
L are coated with a light-shielding coating material or are formed of a colored resin, so that no light passes therethrough. A square window
29
is perforated in the central portion.
The sizes and positions of the transparent windows
28
R and
28
L, pin holes
30
formed in the collimation pattern mask
27
, and recesses
31
are the same as those of the cover frame
1
. The same collimation patterns CP comprising chiefly plural vertical lines are printed on the back surfaces (that come in contact with the films) of the transparent windows
28
R and
28
L.
Next, described below is a procedure of operation for mounting the film and for adjusting the film pitch
1. Referring to
FIG. 13
, two pieces of right and left film holders
2
are mounted on the base frame
3
, are brought to be the closest to each other, and films F and F are mounted on the film holders
2
.
2. Referring to
FIG. 14
, the collimation pattern masks
27
are mounted on the base frame
3
.
3. Next, the base frame
3
on which the collimation pattern mask
27
is mounted is inserted in the slide mount holder unit
13
of the stereo slide viewer
12
shown in FIG.
9
.
4. Perspective feeling of a picture is observed relative to the image of the collimation patterns OP of the collimation pattern mask
27
in a three-dimensional view through the eyepieces
14
R and
14
L of the stereo slide viewer
12
. In a state where the picture is seen in flush with the collimation patterns OP or is seen at the back of the collimation patterns OP. the film pitch of the stereo slide mount is proper,
Fattibene Arthur T.
Fattibene Paul A.
Fattibene & Fattibene
Gray David M.
Nguyen Michelle
LandOfFree
Stereo slide mount and stereo slide viewer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stereo slide mount and stereo slide viewer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stereo slide mount and stereo slide viewer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3077470