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Q Nov. 5, 1946.
2,410,722
0. J. ECKERT
FILM VIEWING DEVICE
Filed Jan. 31, (1944
3 Sheets-Sheet 1
W;
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I VENTOR
BY
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ATTOR
YS
~
Nov. 5, 1946.
2,410,722
c.’ J. ECKERT
FILM VIEWING DEVICE
Filed Jan. 31, 1944
3 Sheets-Sheet 2
CLARENCE J. ECKERT
INVENTOR
BY
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72L
7 ATTOR EYS
‘Nov. 5, 1946.
c. J. ECKERT
I
2,410,722 '
FILM VIEWING DEVICE
Filed Jan. ‘31, 1944_
5 Sheets-Sheet 3
CLARENCE J. ECKERT
INVENT R
/7ATT0RN "
Patented Nov. 5, 1946
2,410,722
UNITED STATES PATENT OFFICE
2,410,722
FILM VIEWING DEVI-CE
Clarence J. Eckert, Rochester, N. Y., assignor to
Bausch & Lomb Optical Company, Rochester,
N. Y., a corporation of New York
Application January 31, 1944, Serial No. 520,457
8 Claims. (Cl. 88—39)
2
1
the movable ?lm holder. This permits the de
This invention relates to a ?lm viewing device
vice to be made more compact in size for the
and more particularly to apparatus for viewing
?lm holder need only be formed of sufficient
?lms of di?erent widths at varying magni?ca
length to permit the two ?lms of diiferent widths
tions.
Continuous ?lms are now widely used for mi Cr to be inserted therein as one of the'?lms held in
the ?lm holder need only be positioned relative
cro?lming records, papers, and the like, for secur
to the light opening and movement of the ?lm
ing miniature reproductions of the same without
holder thereafter to position the ?lm in the view
the necessity of referring to the original docu
of the eyepiece need not be had. The eyepiece
ments and also to realize the many advantages
accruingfrom condensing the information con 10 can'then be moved to a position wherein the en
tire reproduction on the ?lm of lesser width may
tained» therein in a small space for storage and
be viewed or can be successively moved to view
transportation purposes. These ?lms usually
each half of the reproduction on the ?lm of
come in two different widths and it is, therefore,
greater width, dependent upon the ?lm selected
desirable to employ a viewing device having struc
for observation. This permits the length of the
ture for permitting either of the ?lms to be
?lm holder to be decreasedywhich effects a de
viewed at the option of the user.
crease in the length of the device.
,
The viewing device of the present invention will
In another modi?cation of the invention, the
accommodate the two ?lm sizes generally used
device is formed to permit a relatively largearea
and yet is sufficiently compact to permit a user
to easily handle the same. The device is pri- - of the ?lm to be held in the ?lm holder for the
viewing of the same and the eyepiece and auxiliary
marily- intended to be used by a worker in the
lens are mounted for movement the length and
?eld and can be readily carried on the person
width of the ?lm. By so doing, the eyepiece may
of the user.
be positioned to permit any part of the illu
It is the principal object of the present inven
minated ?lm to be viewed successively or, if de
tion to provide a compact ?lm viewing device for
sired, indiscriminately. It will be apparent that
observing selected portions of one of two ?lms of
in this embodiment of the invention, the device
different‘ widths at varying magni?cations. For
is advantageous for rapidly viewing either of the
this purpose, in the preferred embodiment of the
?lms for the frequency of positioning and align
invention, the device comprises a casing having
a chamber extending longitudinally thereof and 30 ing a new section of the ?lm in the ?lm holder,
as had in the other forms of the device, is dis
in which is movably mounted a transparent
?lm holder having spaced slots of different widths
pensed with.
'
The ?lm viewing device of the present inven
for receiving ?lms of different widths. The cas
tion, and its modi?cations, is simple in construc—
ing is so formed that the ?lm holder may be
moved to position selected portions of one of 35 tion, easy and economical to manufacture, may
be readily assembled and is easily adjusted in use.
the ?lms between a light opening in the casing
Further objects and advantages of the present
and an eyepiece carried by a cover plate secured
invention will appear in the following speci?ca
to the casing. The eyepiece may then be focused
tion and in the accompanying drawings in which:
and will produce a magni?ed image of the re
Fig. 1 is a side elevation, partly in section, of
production on the ?lm for viewing purposes.
the ?lm viewing device in its preferred form.
The lens system of the eyepiece of the device
Fig. 2 is a top plan view of the same.
has a ?eld of view su?icient to permit the ob
Fig. 3 is a top plan view of the ?lm holder for
servation of the entire reproduction of the ?lm
holding two different widths of films.
of lesser width but only half the reproduction
Fig. 4 is a section taken on line 4-4 of Fig. 1.
of the ?lm of the greater width. This is desirable
Fig. 5 is a top plan view of a modi?cation of
to insure the compactness of the device for the
the present invention.
easy handling and ready carrying of the device.
Fig. 6 is a side elevation, partly in section, of
If desired, the magni?cation of vthe reproduc
the same.
tion on the ?lm may be increased for the minute
examination of the same by an auxiliary lens sys
Fig. '7 is a top plan view of another modi?ca
tem mounted in the cover plate for movement
tion of the present invention.
into the optical axis of the eyepiece.
_ Fig. 8 is a side elevation, partly in section, of
In a modi?ed form of the invention, the eye
the same.
‘
v
piece and auxiliary lens system are movable as
.The preferred embodiment of the invention is
a. unit relative to the illuminated ?lm held in 55 illustrated in Figs. 1 to 3 wherein the device com
2,410,722
3
.
4
prises a casing Ill having an opening II formed
in the bottom wall thereof. The opening is closed
by a transparent plate I2 slidably mounted in
a channel I3‘ formed in the bottom wall and of
a size suil'icient to close said opening in all posi
tions thereof. The plate I2 actually forms a por
tion of the bottom wall of the casing and, in the
barrel 15 to limit downward movement of the
tube.
The ?eld of view of the eyepiece lens system is
such as to include the entire width of the ?lm IE
but only half the width of the ?lm ll, With this
construction, the device is maintained at a min_
into the ?lm holder, the upper surface of the
plate I2 is formed with a pair of channels I8 and
I9 of different widths and each having a shoul
der formed in the opposite walls thereof as at H
member 42 integral with the lens barrel 43 hold
ing the eyepiece and the raised portion 44 hous
ing the auxiliary lens 45. The slide member 42
is con?ned within the channel M ‘by a pair of
retaining plates 46 and 47 engaging the upper
edge surfaces of the slide member, The plates
imum size so as to a?ord greater convenience
preferred embodiment of the invention, is used to
and facilitate its use.
carry the ?lm to be viewed.
In the modi?cations shown in Figs. 5 and 6, the
The casing includes a cover plate M which is 10 ?lm viewing device there shown diiTers from that
formed with an integral barrel I 5 for receiving a
of Figs. 1 to 4 in that the eyepiece and auxiliary
plurality of lenses forming an eyepiece for view
lens contained in the lens barrel and raised por
ing the ?lm. The casing I9 and cover plate I4
tion integral therewith are mounted for move
are preferably molded of a plastic material to
ment as a unit in the cover plate 4.1}. For this
permit the ready formation of the same.
purpose, the cover plate 48 is formed to provide
To permit the ?lms I6 and II to be inserted
a channel M in which is movably mounted a slide
and 22, respectively, for receiving the edges of
the ?lms I6 and II.
To prevent the ?lms from buckling and to hold
the ?lms ?at, a plate 23 having apertures 23’ and
24’ is cemented to the top face of the transparent
plate I2 and engages the edges of the ?lms re
ceived in the shoulders 2I and 22, As the ?lms
are engaged only at their edges, there is little
likelihood that the portion of the ?lms carrying
46 and 41 are secured to the cover plate by screws,
as shown.
The eyepiece comprises the lenses 43 and 49
which are carried by a tube 59 threaded into tube
5i which in turn is threaded into lens barrel 43.
It will be apparent that the lenses may be focused
by turning the knurled portions of the tubes 59
the image becoming scratched by contact with 30 and 5|. The auxiliary lens 45 is mounted on
the viewing device.
slide 52 so that it may be selectively positioned
The eyepiece carried by barrel I5 comprises the
in or out of cooperative relation with the eyepiece
lenses 25 and 26 which are mounted in tube 2'!
slidably held in tube 28 which in turn is slidable
in barrel I5 whereby the eyepiece may be focused.
In operation, the ?lm holder may be moved by
lugs 28, formed integral with the plate 23 and
lenses in order to vary the magni?cation.
The casing 53, carrying the cover plate 40, is
provided with a channel 54 in which is slidably
mounted a glass plate 55 having on its face cut
away portions 56 and BI. An opaque plate 58
having spaced apertures 59 and 60 is cemented
to the top of plate 55 with the apertures sub
extending laterally therefrom, to position a se
lected portion of one of the ?lms between the
opening II in the casing I0 and the eyepiece 40 stantially in alignment with the cut-away por
carried by the cover plate I4. The ?lm will be
tions 56 and 51. The under surface of plate 58
illuminated by the passage of light through the
has shoulders 6| and 62 formed, respectively,
opening I I and the ?lm holder so that a magni
along the sides of the apertures 59 and 56 so as
?ed image of the reproduction on the ?lm may
to provide slideways for receiving the two ?lms,
be viewed upon focusing the eyepiece.
'‘ B3 and 64.
In many cases, it is desirable to secure a greater
In operation, the ?lms 63 and 54 are inserted
magni?cation of a, selected portion of the repro
in the slideways formed between plates 55 and
duction on the ?lm than afforded by the lenses
58. The ?lm holder may be moved by means of
25 and 26 of the eyepiece. For this purpose, the
the lugs 65, integral with plate 58, to selectively
magni?cation of the ?lm image may be aug- - position the desired ?lm in alignment with the
mented by movement of an auxiliary lens 29
eyepiece and the opening 66 formed in the casing
into the optical axis of the eyepiece. To e?ect
53. When the wider ?lm 64 is opposite opening
this desired result, the lens 29 is mounted in a
66, the respective halves of the area in alignment
slide member 30 carried in a raised portion 3|
may be selectively viewed by moving slide 42
of the cover plate I4. The raised portion 3! is
by grasping the barrel 43 so as to locate the eye
formed integral with the barrel I5 and has a
piece in the desired position.
groove extending therethrough receiving the slide
In the modi?cation shown in Figs. 7 and 8, the
member 39. Referring now to Fig. 4, the slide
device comprises a casing ‘I0 having a channel ‘II
member 30 is held within the groove by retain
which is slidably mounted a ?lm holder. The
ing plates 32 and 33 secured to the surfaces of 60 ?lm holder is formed of a glass plate ‘I2 having
the edges de?ning the groove by screws, as shown.
on its upper face the cut-away portions 13 and ‘I4.
To accurately position the axis of the lens 29
As in the other ?lm holders, an apertured opaque
plate ‘I5 is cemented to the top of plate ‘I2 with
with the optical axis of the eyepiece, the slide
the apertures substantially in alignment with the
member 30 is provided with a. stop pin 34 to limit
cut-away portions. Adjacent the edges of the
the inward movement of the lens 29 beyond a
cut-away portions in the glass plate 12 there are
predetermined position It will be apparent that
formed shoulders ‘I6 so as to provide slideways for
the lens 29 may be withdrawn to an inactive po
the ?lms TI and ‘It. The ?lm holder may be
sition beneath the portion 3| of the cover plate
moved by means of the lugs ‘I9 formed integral
upon movement of the slide member 39 in an out~
with plate "I5 and extending laterally from the
ward direction. To facilitate the movement of
casing.
the member 3|], the outer end thereof is provided
A plate 99 secured to the top of easing ‘I5 has
with a groove 35 for engagement with a ?nger
an upturned ?ange 8| extending around all sides
of the user. To prevent the tube 28 contacting
thereof. Slidably mounted on the top of plate 80
the slide member, a stop pin 36 is mounted in the
is a slide member 82 having an integral upstand
2,410,222
6
stantially rectangular in form and ‘having an
opening therein forming .a light passage; means
tormoving said ?lm holder to position one of said
Rotatablyl' mountedvin‘portion ‘83., is 'allstub shaft
?lms lini the-path of flight from said transparent
,88 car-ryin‘g'anarm .89 which holds the auxiliary
lens”. By'meansof an arm Slthe lens 90 may iii portion; a, slidetmember movably mounted in said
plate; said member‘formed substantially rectan
be selectively swung intov or out .of‘operative rela
gular in shape andof less area than said plate to
tion with the lenses 88 and 81. The lens‘ 90 is
permit movement of said member in any direc
held. in selected position by means of the .pin 92-,
tionon said plate; a lens barrel ?xed to said slide
carriedby arm v89,-which ‘isurged into notch v93
'10 member‘; 'a'lens system ‘carried in said lens barrel
by spring 94 surrounding shaft 88. ' .
‘for ‘(viewing :the illuminated ?lm; and a cover
vMounted on the upturned ?ange 8.1. is the
platelsecured vto said retaining plate and having
cover plate 95- which has the centrally disposed
an opening through which said lens barrel‘ex
aperture 98 through ‘which the portion '83 ex
tends, ‘the opening in said cover plate permitting
tends. The aperture 96 is relatively large in ‘area
movement of the slide member on said retaining
but is smaller than the area of slide 82 which, in I
plate the-length and width of the illuminated
turn,E is'smaller than'the area con?ned byv-t'he
?lm to bring any selected portion of the ?lm in
flange ‘8|. It 1will thus be apparent that the
the ?eld of view ‘of said lens system. '
slide member 82,’ carrying the eyepiece, may be
3." A ?lm viewing (device comprising a casing,
moved freely in different directions 50 as to posi
tion the eyepiece in di?’erentlocations over the 20 said casing having a ‘wall having a slideway and
an opening iorming a light passage; a ?lm holder
?lm which is in alignment vwith aperture ‘91 in
_ slidably mounted in said slideway adjacent said
the bottom of casing 10 and the aperture 98 in
opening, said ?lm holder having guideways of
plate 80.
'
different widths ‘for receiving ?lms of different
In' this embodiment of the invention, the for
widths; ‘a retaining plate ?xed to said casing for
mation of the device permits a relatively large
ing. portion :83 providedwitha bore .84 ‘for slidably
‘receiving the tubei'85 carrying lenses“ and 181.
area of each ?lm to‘be- held in the-?lm holder for
the viewing of the same. As the eyepiece is mov
holding said?lm- holder in said slideway, said re
taining ‘plate formed substantially rectangular in
form and having an opening therein forming a
light passage; means for moving said ?lm holder
to position one of said ?lms in the path of light
from said opening; a slide member movably
desired, indiscriminately.
mounted in said plate, said member formed sub
It will be apparent from the foregoing that I
stantially rectangular in shape and of less area
have attained the objects of my invention and
than said plate to permit movement of said mem
provided a compact ?lm viewing device for view
ber in any direction on said plate; a lens barrel
ing selected portions of one of a plurality of ?lms
?xed to said slide member; a lens system carried
of different widths at varying magni?cations.
in said lens barrel for viewing the illuminated
Various modi?cations other than those shown
?lm; a cover plate secured to said retaining plate
and described may obviously be made without
and having an opening through which said lens
departing from the spirit of my invention or the
scope of the appended claims.
40 barrel extends, the opening in said cover plate
permitting movement of the slide member on said
I claim:
retaining plate the length and width of the il
1. A ?lm viewing device comprising a casing,
luminated ?lm to bring any selected portion of
having a. wall formed with an opening providing
the ?lm in the ?eld of view of said lens system;
a light passage; a ?lm holder slidably mounted
a slide member movably mounted in said ?rst
in said casing adjacent the opening in said wall;
named slide member; an auxiliary lens system
said ?lm holder having guideways of different
carried by said second-named slide member; and
widths for receiving ?lms of di?erent widths; a
means for moving said slide member to position
cover plate for said casing; a slide member
I said auxiliary lens system with the axis thereof
mounted in said cover plate for movement in a
plane parallel to the plane of the illuminated 50 in alignment with the axis of said ?rst-named
lens system.
?lm; a lens barrel ?xed to said slide member; a
4. A ?lm viewing device comprising a casing,
lens system carried in said lens barrel for viewing
lens means carried by the casing, a wall of the
the illuminated ?lm; a slide member movably
casing having an aperture in alignment with the
mounted in said ?rst-named slide member; an
auxiliary lens system mounted in said second 55 lens means, a ?lm carrying member within the
casing, said member comprising a light transmit
named slide member; means for moving said
ting plate having integrally formed channel
holder to position one of said ?lms between the.
means for slidably supporting ?lms of di?erent
opening in said wall and said ?rst-named lens
widths, said member being slidably mounted
system; means for moving said ?rst-named slide
member to position any selected portion of the 60 within the casing to selectively position the differ
ent ?lms in alignment with the lens means, and
illuminated ?lm in the ?eld of view of the ?rst
means externally of the casing for moving the
named lens system; and means for moving said
?lm carrying member.
second-named slide member to position said aux
5. A ?lm viewing device comprising a casing
iliary lens system with the axis thereof in align
ment with the aXis of said ?rst-named lens 65 having an aperture in a wall, lens means carried
by the casing in alignment with the aperture, a
system.
?lm carrying member mounted within the cas
2. A ?lm viewing device comprising a casing,
ing, said member comprising a transparent plate
said casing having a wall having a slideway and
having channels for receiving ?lms of different
a transparent portion forming a light passage; a
?lm holder slidably mounted in said slideway ad 70 widths and an opaque plate having apertures se
able the length and width of the ?lm, the eye
piece may be positioned to permit any part of the
illuminated ?lm to be viewed successively, or, if
jacent said transparent portion, said ?lm holder
having guideways of di?erent widths for receiv
ing ?lms of different widths; a retaining plate
?xed to said casing for holding said ?lm holder
in said slideway, said retaining plate formed sub
cured to the transparent plate above the chan
nels to provide ?lm guideways, said member being
slidably mounted within the casing to selectively
position the di?erent ?lms in alignment with the
75 lens means.
7
2,410,722
6. A film viewing device comprising a casing
having a wall provided with an aperture, lens
means carried by said casing in alignment with
the aperture, a film carrying member movably
mounted within the casing, said member com
of the mounting means whereby the slide may be
moved longitudinally and transversely to selec
tively position the lens means relative to the ?lm.
8. A ?lm viewing device comprising a casing,
top, bottom, and intermediate walls on the casing,
said walls having apertures which are in align
formed on a surface thereof, an apertured metal
ment, a slide mounted to move in transverse and
plate secured to the channeled surface of the
longitudinal directions between the top and in
transparent plate whereby the channels provide
termediate walls, mounting means carried by the
?lm guideways, and portions on the metal plate 10 slide in alignment with an aperture in the slide,
extending through slots in the casing whereby the
lens means carried by the mounting means, said
member may be moved to selectively position a
mounting means projecting through the aperture
?lm in operative relation to the lens means.
in the top wall, means for holding a ?lm between
7. A ?lm viewing device comprising a casing,
the intermediate and bottom walls and in align
top, bottom, and intermediate walls on the casing, 15 ment with the apertures therein, the area of the
said walls having apertures which are in align
aperture in the upper wall being larger in longi
ment, a slide mounted to move between the top
tudinal and transverse directions than that of the
and intermediate walls in transverse and longi
mounting means whereby the slide may be moved
tudinal directions, mounting means carried by
longitudinally and transversely to selectively po
prising a transparent plate having channels
the slide in alignment with an aperture in the 20 sition the lens means relative to the ?lm, and sup
slide, lens means carried by the mounting means,
plementary lens means carried by a holder on the
said mounting means projecting through the ap
mounting means, said holder being swingably
erture in the top wall, means for holding a ?lm
mounted, and means for retaining the holder in
between the intermediate and bottom walls and
adjusted position whereby the supplementary lens
in alignment with the apertures therein, the area
means may be selectively moved into or out of co
25
of the aperture in the top wall being larger in
operative relationship with the lens means.
longitudinal and transverse directions than that
CLARENCE J. ECKERT.
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