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Патент USA US2122865

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July 5, 1938I
H. KUPPENBENDER
.
2’122’865
PHOTOGRAPHIC CAMERA
Filed June 8, 1936
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2 Sheets-Sheet 1
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‘Fig. 3
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6.171391‘
July 5, 1938-
2,122,865
H. KUPPENBENDER
PHOTOGRAPHIC CAMERA
Filed June 8, 1936
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44
2 Sheets-Sheet 2
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Patented July 5, 1938
2,122,865
UNITED STATES PATENT OFFICE
2,122,865 .
.- PHOTOGRAPHIC CAMERA
Heinz Kiippenbender, Dresden, Germany, as
signor to Zeiss Ikon Aktiengesellschaft, Dres
den, Germany
Application June 8, 1936, Serial No. 84,147
In Germany June 15, 1935
11 Claims. (CI. 88-23)
The invention relates to improvements in ph0-‘
Fig. 4 is a rear elevation view of the roll?lm
tographic cameras and particularly pertains to camera of Fig. 2.
miniature cameras which are combined with a
Fig. 5 is a front elevation view of the roll?lm
photoelectric exposure meter.
camera, with a portion of the front wall removed
5
It is an object of the invention to mount the and partly in section substantially on line V—V 5
photoelectric cell of the exposure meter foldably of Fig. l to illustrate the position of the measur
upon one of the narrow walls of the camera cas
ing in such a manner that in inoperative position
of the exposure meter the photoelectric cell is
10 folded ?at against the narrow wall, while in the
operative position the photoelectric cell extends
substantially at a right angle with respect to said
narrow wall and faces the object to be photo
graphed. In a preferred embodiment of the
invention the photoelectric cell is foldably mount
ed upon the upper narrow top wall of the camera
casing.
.
Another object of the invention is to provide
the carrier in which the photoelectric cell is ar
.20 ranged with a. cover which is adapted to protect
the photoelectric cell in its inoperative position
against the action of light rays.
Still another object of the invention is to
attach the cover for the photoelectric cell in such
25 a manner on the carrier that in the operative
position of the photoelectric cell the cover serves
and
Fig. 6 is a wiring diagram of the photoelectric
exposure meter.
10
As shown in Fig. 1 the camera casing consists
of two separable sections 5 and 6 of which the
latter forms a rear cover adapted to permit ac
cess to'the interior of the front section 5 for the
insertion and removal of a roll ?lm. The front 15
section 5 is provided at each end with a semi
cylindrical recess 1 for receiving the customary
?lm supply and take-up spools respectively. In
the present instance the front section 5 is in
t._.rally formed with a ?lm supporting wall 8
located substantially in the image plane and
against which the film is pressed by a backing
plate 9 yieldingly attached at ID to the inner
wall of the rear cover section 6.
The ?lm which
is taken from the supply spool indicated at H is 25
moved over the film supporting wall 8, and passes
as a screen which keeps thev light from above
over a sprocket roller l2 before wound upon the
away from the cell.
take-up spool l3.
'
Another object of the invention resides in a
30 novel arrangement of the observation device for
the measuring instrument of the exposure meter.
The observation device consists of a foldable
mirror which in the preferred embodiment of the
invention is automatically moved into operative
35 position when the photoelectric cell is moved into
operative position, whereby the direction of view
ing the indication of the measuring instrument in
said mirror is the same in which the photograph
er views the object he intends to photograph.
With these and other objects in view, which
40
will appear as the description proceeds the in- .
vent-ion consists in the novel features of con
struction, combination of elements and arrange
ment of parts as hereinafter more fully described.
In the accompanying drawings:
Fig. 1 is a top view of a miniature roll?lm
camera with the casing partially in section on the
line I—I of Fig. 2 to illustrate the position of the
?eld magnet of the measuring instrument.
50.~
ing instrument and its associated ?eld magnet,
Fig. 2 is a front elevation view of the roll?lm
"camera, with the photoelectric cell in operative
position.
' Fig. 3 is‘ a side elevation view of the roll?lm
camera of‘Fig. 2 partly in section on the line
III'—'III of Fig. 2.
"
'
The ?lm supporting wall 8 is provided with
a rectangular image opening I 4 and on its side 30
facing the front wall l6 of the front section 5
are arranged two forwardly projecting ?anges l5.
These ?anges l5 may be curved concentrically
about the optical axis of the lens system [1 which
is detachably attached to the front wall “5.
According to Fig. 1 the shutter device 20 is
arranged as a unit in the front section 5 of the
camera casing between the front ends of the
?anges l5 and the front wall I6 which supports
the lens system H.
_
40
The adjustment of the shutter device 20 for
the various exposure times is effected by rotating
a ring 22 which is rotatably mounted on the
shutter device and has attached thereto an out
wardly projecting stud 23, passing through a
slot 24 in the front wall l6 of the camera casing
and carrying a pointer 25 with an actuating knob
26 thereon. This pointer 25 is adapted to be set
manually opposite any scale division of an ex
posure time scale 21 which in the present instance 50
is arranged on a front wall portion of the camera
casing.
The measuring instrument of the photoelectric
exposure meter is arranged in a space which nor—
mally remains vacant in the ordinary cameras. 55
2,12a,ses
2
It will be noted from Figs. 1 and 5, that the
measuring instrument is provided with a casing
2| of substantially annular shape whose axis is
coaxial with the optical axis of the lens system.
The inner nearly circular wall 25 of the casing
25 surrounds the ?anges i5 which project for
wardly from the film supporting wall 8. The
outer substantially circular _wall 30 of the casing
25 is provided with lugs 2i through which screws
carrier 54 downwardly upon the top wall 4 of the
camera casing. During this folding action the
carrier 54 engages with its rear face the up
wardly inclined mirror 52 and folds the latter
likewise downwardly until it comes to lie in the
10 52 pass which secure the casing and therewith
the entire measuring instrument as a self-con
tained structure in the front section 5 of the
camera casing. In the annular portion of the
casing 25 is positioned the circular field magnet
15 53 which is open at its upper portion to receive
between its ends the armature 34 which is se
cured to a vertically arranged rotatable shaft 35
which also has secured thereto the pointer 35.
According to Fig. 5 the casing 25 is provided at
20 its upper right hand portion with an extension
in which is arranged the scale 31 provided with a
mark 38 opposite which the pointer 36 is to come
to rest during the adjustment of the exposure
meter. In a horizontal wall portion of the casing
25 28 and directly above the scale 51 is arranged an
‘ opening 38 which lies directly below a window 40
arranged in the top wall of the camera. casing
and through which the measuring instrument
may be read.
Immediately above the window 40 there is ar—
30
ranged in the upper face of the top wall 4 of the
camera casing a recess Si in which is mounted a
recess (Fig. 5).
‘ '
On the upper edge of the carrier 54 for the
photoelectric cell 44 is hingedly secured a cover
51 which in the operative position of the photo
electric cell 44, as shown in Figs. 2 and 3 is auto
10
matically moved by one or more springs 55 up
wardly away from the front face of the photo
electric cell 44 so as to form a screen or hood
which prevents the light from above from striking
the photoelectric cell. The cover 51 is provided 15
on one of its edges with an angularly bent tongue
59 adapted to be’ engaged by a locking pin 55
when the cover 51 and the photoelectric cell 44
are folded into inoperative position as shown in
Fig. 5. The locking pin 50 is attached to a spring
influenced slidabie member 5| mounted in a re
cess 62 in the underside of the top wall 4 of the
camera casing (Fig. 5). This slidabie member
BI is adapted to be manually moved in the direc
tion of the arrow A by a button 55 which extends
through a slot 54 in the top wall 4 to the outside
of the camera casing.
>
The operation of the camera, as far as the
adjustment of the camera with the msistance of
the exposure meter is concerned is as follows:
If it is desired to take a photograph with a cer
tain exposure time,_i'or instance 1/25 of a second,
foldable mirror 52 which is pivotally attached at the shutter adjusting pointer 2515 set opposite
.53 adjacent the forward edge of said recess 5|, the respective scale division of scale 21 and then,
while pointing the lens system toward the scene
35 (Figs. 1 and 3). This mirror 52 is automatically
moved by a spring 54 into its operative position, to be photographed, the diaphragm adjusting
as shown in Figs. 3 and 4, when the photoelectric ring 50 is rotated until the pointer 55 of the
cell 44 is moved into operative position as will be measuring instrument is brought opposite the
described later. As will be noted from Fig. 4 the mark 38, which indicates that the diaphragm has
been adjusted to the correct opening for the pre
image of the scale 21 and pointer 35 as appear
ing in the mirror 52 can be observed by locking vailing light condition and the desired exposure
upon the inclined mirror 52 in the ‘same direc ‘ time. During the adjustment of the shutter, the
resistance 4| is rotated and during the adjust
tion the camera faces the object to be photo
ment of the diaphragm the contact member 45
graphed.
is rotated and moved along the resistance 4i to
The exposure meter is provided with a vari
able resistance 4| which is mounted on the ro
tatable ring 22 of the shutter device 25. One
end of the resistance 4!, according to Fig. 6 is
connected by a ?exible conductor 42 with one
terminal of the photoelectric cell 44. Another
conductor 45 leads from the other terminal of
the photoelectric cell to one terminal of the
measuring instrument whose other terminal is
connected by a conductor 45 with’ a resilient con
55 tact member 45 which slidably engages the re
sistance 4|. The contact member 45 is mounted
on a ring 41 which is rotatably mounted on the
inner face of the front wall It of the camera cas
ing and coaxial with the optical axis of the lens
system IT. This ring 41 is provided with an out
wardly extending bracket 45 which passes
through a curved slot 401a the front wall ii of
the camera casing and is adapted to be coupled
with the diaphragm adjusting ring 50 of the lens
system II.
The photoelectric cell 44 is mounted in suitable
carrier 54 which is pivotally attached by means
of a hinge pin 55 upon the narrow top wall 4 of
the camera casing adjacent the front edge. A
70 coiled spring 55 which is supported by a hinge
pin 55 is adapted to move and maintain the car
rier 54 in a vertical position (Figs. 2, 3, 4) in
which the photoelectric cell 44 faces the object
to be photographed. The photoelectric cell 44 is
75 moved into inoperative position by folding the
vary the amount of resistance in the .circuit of
the exposure meter, while the photoelectric cell
44 due to the light failing upon it, is energized
to supply the electric current for operating the‘
indicating instrument.
It is, however, also possible to select first a
certain diaphragm opening for the scene to be
photographed and then to adjust the shutter for
the respective exposure time. This is done by
moving first the diaphragm adjusting ring 55
to the ‘desired diaphragm opening and then ad
justing the pointer 25 of the shutter device until
the pointer 26 of the measuring device comes
to rest opposite the mark 55.
What I claim as my invention is:
1. In a photographic camera, the combina
tion of a photoelectric exposure meter, 9. camera
casing, a photoelectric cell, a carrier for said
photoelectric cell pivotally connected to the out
side of said camera casing and adapted to sup
port said photoelectric cell selectively in opera
tive position in which the cell projects ‘outwardly
from the camera casing and in an inoperative
position flat on said casing, spring means for urg- _
ing said carrier into operative position with the
plane of the cell substantially parallel to the
plane of the film at the exposure aperture in the
camera, means adapted to lock said carrier in its
inoperative position and means mounted on said
carrier adapted to cover and uncover the photo
2,122,865
electric cell, said last named means when uncov
ering said cell when the latter is in operative po
sition being movable to a position in which it pro
tects the cell against light coming from above.
2. In a photographic camera, the combination
of a photoelectric exposure meter, a camera cas
ing, a photoelectric cell, a carrier for said photo
electric cell pivotally connected _to the outside of
said camera casing and adapted to support said
10 photoelectric cell selectively in operative position
and in an inoperative position ?at on said casing,
spring means for urging said carrier into opera
tive position with the plane of the cell substan
tially parallel to the plane of the ?lm at the ex
15 posure aperture in the camera, cover means for
said cell pivotally mounted upon the top of said
carrier having spring means for urging the cover
means to a position substantially normal to the
plane of the cell when the latter is in operative
3
ing said photoelectric cell upon said top wall,
said last named means being adapted to engage
said mirror to fold the same downwardly into
inoperative position when‘ the photoelectric cell
is folded into inoperative position, said photo
electric cell and said mirror being each provided
with means for automatically moving these mem
bers upwardly into operative position.
6. In a photographic camera, the combination
of a photoelectric exposure meter, a camera cas
ing having a top wall, a-measuring instrument
forming a part of said exposure meter mounted
within said camera casing, means for rendering
visible from the outside the indications of said
measuring instrument, saidv meansv including a 15
window in said top wall and a mirror pivotally
attached to said top wall and extending in its
operative position outwardly and at'an angle
with respect 'to said top wall to re?ect the in
dications of the measuring instrument rear-' 20
wardly; a photoelectric cell, means. for-foldingly
mounting said photoelectric cell upon said top
wall, said last named means being, adapted to
engage said mirror to fold the same downwardly
into inoperative position when the photoelectric 25
cell is folded into inoperative position, said photo
electric cell pivotally connected to the outside of - electric cell and said mirror being each provided
said camera casing and adapted to support said with meansfor automaticallymoving these mem
photoelectric cell selectively in operative position bers upwardly into operative position, and a cover
30 and in an inoperative position ?at on said casing,
for said photoelectric cell arranged touncover the 30v
spring means for urging said carrier into opera
photoelectric cell automatically when the same is
tive position with the plane of the cell substan
moved into operative position.
tially parallel to the plane of the film at the ex
7. In a photographic camera, the combination '
20 position to protect the cell from light coming
from above and means for locking said cover
means in its cell covering position and said carrier
in its position ?at on the casing.
3. In a photographic camera, the combination
25 of a photoelectric exposure meter, a camera cas
ing, a photoelectric cell, a carrier for said photé
posure aperture in the camera, cover means for
said photoelectric cell pivotally mounted upon the
top of said carrier having spring means for urg
ing the cover means to a position substantially
normal to the plane of the cell when the latter is
in operative position to protect the cell from
of a photoelectric exposure meter, a camera cas
ing having a top wall, a measuring instrument 85
forming a part of said exposure meter mounted
within said camera casing, means‘ for rendering
visible from the outside the indications of said
measuring instrument, said means including a
40 light coming from above, and means for locking Window in said top wall and a mirror pivotally
‘ said cover means when it covers said cell to said I attached to said top wall and extending in its
camera casing when the carrier including the
‘photoelectric cell thereon is folded into inopera
tive position.v
45
50
55
60
65
70
operative position outwardly and at an angle with
respect to said top wall to re?ect the indications
of the measuring instrument rearwardly; a
4. In a photographic camera, the combination photoelectric cell, means for foldingly mounting 45
of a photoelectric exposure meter, a camera cas- - said photoelectric cell upon said top wall, said
ing having a top wall, a measuring instrument last named means being adapted to engage said
forming a part of said exposure meter mounted mirror to foldthe same downwardly into in
within said camera casing, means for rendering operative position when the photoelectric cell is
visible from the outside the indications of said ’ folded into inoperative position, said photoelectric
measuring instrument, said means including a cell and said mirror being each provided with 60
window in said top wall and a mirror pivotally means for automatically moving these members
attached to said top wall and extending in its op
upwardly into operative position, a cover for said
erative position outwardly and at an angle with photoelectric cell arranged to uncover the photo
respect to said top wall to re?ect the indications electric cell automatically when the same is 55
of the measuring instrument rearwardly; a pho
moved, into operative position, and means for
toelectric cell and means for foldingly mounting locking said cover to said top wall when said
said photoelectric cell upon said top wall, said photoelectric cell and said mirror are folded into
last named means being adapted to engage said inoperative position.
mirror to fold the same downwardly into inop
8. In a photographic camera,» the combination 60
erative position when the photoelectric cell is of a photoelectric exposure meter, 'a camera cas
folded into inoperative position.
,
~
ing having a top wall, a measuring instrument
5. In a photographic camera, the combination forming a part of said exposure meter mounted ‘
of a photoelectric exposure meter, a camera cas
within said camera casing, means for rendering
ing having a top wall, a measuring instrument visible from the outside the indications of said 65
forming a part of said exposure meter mounted measuring instrument, said means including a
within said camera casing, means for rendering window in said top wall and a mirror pivotally
visible from the outside the indications of said attached to said top wall and‘ extending in its
measuring instrument, said means including a operative position outwardly and at an angle
window in said top wall and a mirror pivotally with respect to said top wall to re?ect the in 70
attached to said top ‘wall and extending in its dications of _the measuring instrument rear
operative position outwardly and at an angle with ,
respect to said top wall to re?ect the indications
of the measuring instrument rearwardly; a
76 photoelectric cell and means for foldingly mount
wardly; a,photoelectric cell, means for _foldingly
mounting said photoelectric cell upon said top
wall, said last named means being adapted to
engage said mirror to'fold thesame downwardly 76
4
2,122,865
into inoperative position when the photoelectric
operative position substantially normal to said
cell is folded into inoperative position, and a
cover for said photoelectric cell arranged to un
cover the photoelectric cell when the same is
top wall, in said last named position the active
front face of, said cell facing the object to be
moved into its vertical operative position, said
cover in this position of the photoelectric cell
forming a screen which protects said cell against
light rays from above.
9. In a photographic camera, the combination
10 of a photoelectric exposure meter, a camera
photographed, and means mounted on said cell
moving means for protecting the active face of
said cell from light coming from above when the
cell is in operative position, said cell-protecting
means being movable from the position where it
protects the cell from light coming from above
‘to a position where it serves as a cover for the
cell when the latter is in inoperative position.
casing, a photoelectric cell, means pivotally at
11. In a photographic camera, the combination
tached to said casing for positioning said cell se
lectively flat against a wall of said camera and of a photoelectric exposure meter, a camera cas
at an angle to said wall respectively, in which ing having a top wall, a photoelectric cell, a car
last named position the active face of the cell rier for said photoelectric cell mounted movably 15
is directed toward the object to be photographed, ‘on said ‘camera casing for moving said cell se
said cell-positioning
lectively into inoperative position ?at against the
means for protecting the active face of said cell
outer face of said top wall and into operative
position substantially normal to said top wall,
and means ‘ mounted
on
from light coming from above when the cell is
in operative position, said cell-protecting means
being movable from the position where it pro
tects the cell from light coming from above to a
position where it serves as a cover for the cell
when the latter is in inoperative position.
10. In a photographic camera, the combination
in said last named position the active front face 20
of said cell facing the object to be photographed,
~ and means mounted on said‘ carrier and movable
with said cell for protecting the active face of
the cell from light coming from above when the
cell is in operative position, said last named
of a photoelectric exposure meter, a camera cas
means being movable relatively to said cell to a
ing having a top wall, a photoelectric cell, means
position where it serves as a cover for the same
pivotally attached to said casing for moving said
cell selectively into inoperative position ?at
against the outer face of said top wall and into
whenv the cell is in inoperative position.
HEINZ KU'PPEN'BENDER.
3°
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