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Nov. 13, 1962
'
K. HINTZE
3,063,355
PHOTOGRAPHIC CAMERAS
Filed Sept. 16, 1960
47
4a
2433 2
58
23
3O
532
46
34
26/
54
'
4
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-
Inventor
K4406’ ?/?vrzz
By
Attorney
ice
.Uniwd . States,
3,063,355
Patented Nov. 13,. 1962
2
"'-
‘
3,063,355
"
'
vPHOTOGRAPHIC CAMERAS
ion. This claw 8 is positively connected, ‘in the direction
of rotation, with the bevel wheel 12, which in turn
meshes with the bevel wheel 13.v The bevel wheel 13 is
Klaus Hintze,Dresden, Germany, assiguors to VEB Kam
era-und 'Kinowerke Dresden, Dresden, Germany
in engagement with the‘ toothed diaphragm setting ring
, Filed Sept. 16, 1960, Ser. No, 56,575
,
,7 Claims. ‘,(Cl. 955-10)
ciated thearm 19, on which a return spring 26 is secured.
14. With the diaphragm setting ring 14 there is asso
This arm 19 is in gear. connection with the setting slider
'18. Furthermore, the diaphragm setting ring 14 possesses
the nose'.38, in the path of which'there lies the nose 39
with setting members for exposure factors such as dia
phragm and exposure time, controlled by an exposure 10 of the. exposure time setting ring .15. On the ‘exposure
time setting ring 15’there is secured the return‘spring 40,
meter, a release which frees the shutter drive mechanism
being blocked in dependence upon the position of the
which seeks to draw the exposure time 'setting'ring 15
against the stop 41 fast with the housing.
pointer of the exposure meter.
The step-shaped setting. slider 18 carries the dog 27,
In order to avoid the observation of warning marks
in the path of which there is arranged an interrupter 26
indicating inadequate light conditions, a blocking device
lying in the current circuit 42. Opposite the edge 62 of
for the release has already become known which is formed
step-shaped construction (see especially FIGURE 2)
by the pointer of ‘an exposure meter, the pointer having
.there swings the pointer'28'of the galvanometer 29, which
to prevent the requisite release stroke._ However, the
‘is connected through the lead 43 with the photo-electric
small dimensions of the pointer cross-section, selected
cell 30.
.
.
in view of the lightest possible construction of the pointer,
I‘For catching the pointer 28 there is provided the sup
‘are not sufficient for preventing the release stroke. 2' Apart
port rail 23, the,.slot 44 of which is guided on pins 45.
from this, the known blocking device as a result of the
:On' thesupport rail 23 there is secured the return spring
release pressure acting upon the pointer inclines to dam~
46. 'On thearm 47 of the support rail 23 there is arranged
age to the pointer. Furthermore, from this known device
The present invention relates to a photographic camera
no means may be seen which, despite return of the pointer 25 the galvanometer 29.
By rotation of a part or of the
into its rest position, maintain the settings of the exposure
whole galvanometer the?lm sensitivity for example can
factors during the running-off of the shutter mechanism,
be taken into consideration. In the path of the edge 58
of the arm 47 there lies the locking lever 21, which the
spring 48 seeks to keep in contact with the contact 24.
until termination of. the exposure operation.
‘
The aim of the invention is the avoidance ‘of the stated
disadvantages by the provision of a novel exposure con
trol device, whichin the case of inadequate light condi- _
tions blocks the release and maintains the settings of the
exposure factors until termination of the exposure op
eration.
'
,
-
In accordance’with the invention this is achieved due
to the fact that a support rail which catches-the pointer on
meeting of a setting slider is preferably arranged formove
ment against a return spring and is in engagement with a
locking lever which blocks the release. The‘galv'anometer
is preferably arranged on one arm-of the support rail.
In the case for example of a setting slider driven by an
electric motor the lockinglever‘i's expediently constructed
as a contact which lies in the current circuit of the elec
tric motor which moves the setting slider against the
The locking lever 21 possesses the projection 22, which
lies in the path of the collar 33 of the release 32. In the
path of the collar 33 there further lies the switch 25.
The release 32 can be pressed down against the action of
the spring 17.
.
In the path of the projection 49 of the release 32 there
‘is arranged the catch lever 51 drawn by the spring 50
against the shutter drive ring 52 which lever holds the
said shutter drive ring 52 against the drive spring 53. The
‘release 32 is further connected through the bell-crank
lever 16 and the rod 34 with the arm 9. This arm 9 is
rotatable about the spindle 54 and articulatedly connected
through the pin 55 with the claw 8. The spring 56 seeks
to hold. the claw 8, out of engagement with the crown
wheel‘ 7. The locking pawl 10 pivoted by the spring 31
pointer and is to be set in operation by ‘the release. In 45 into the path of the arm 9 is actuated by the push-rod
11, which is shifted by the dog 35, towards the end of
order to prevent the running-off of the shutter mech
the running-off movement of the shutter drive .ring 54.
anism in the case of the position of the pointer which
The manner of operation of the device is as follows:
does not permit a proper exposure, the setting slider
On depression of the release 32 until the collar 33 con
possesses a dog ‘which actuates an interrupter. disposed in
50 tacts the projection 22, ?rstly the collar 33 by actuation
the current circuit of the electric motor.
The ‘gear connection between the electric motor and .
the setting slider is expediently constituted by a coupling
actuated by the release, which is arrested in the coupling
of the switch 25 closes the current circuit 42, so that the
motor 6 is set in operation. At the same time the re
lease 32, through the bell-crank lever 16 and the rod 34,
has brought the claw 8 into engagement with the crown
position by a locking pawl, until termination of the ex
posure operation, so that the set values of the exposure 55 wheel 7, without the locking pawl 10 falling behind the
factors are maintained during the entire operation. The .
details of the invention may be seen from an illustrated
arm ‘9. Thus the motor is in a position. to rotate the set
ting ring 14 in the clockwise direction, through the cou
pling 7, 8, which takes place against the action of the
and described example of embodiment.
spring 20. Here ?rstly, the diaphragm aperture is en
FIGURE 1 shows the diagrammatic construction of
the setting mechanism controlled by the exposure meter; 60 larged. When the maximum diaphragm aperture is
reached, the nose 38 of the diaphragm setting ring 14
and
strikes upon the nose 39 of the exposure time setting
FIGURE 2 shows the setting slider with the movable
ring 15, so that now with maintenance of the maximum
support rail.
diaphragm aperture the exposure times areextended. At
In a camera housing 1 (not specially illustrated) there 65 the same time, the setting‘ slider 18 is moved towards
is arranged the motor 6 vdriven by a current source 57,
the pointer 28, until the step-shaped edge 42 presses the
the drive pinion 36 of which motor rotates the toothed
pointer 28 against the support rail 23 and in doing so
wheel 3 connected with the worm 4, through an inter
moves the edge 58 of the arm ‘47 against the locking
mediate wheel 2. The worm 4 is in engagementwith the
lever 21. Consequently, the locking lever 21 is rotated
worm wheel 37. With the worm wheel 37 there is con 70 in the clockwise directionso that, on the one hand, the
nected through the shaft 5 the crown wheel 7, opposite
switchrtformed by the locking lever 21 and the contact 24
to which the claw 8 is arranged in axially movable fash
is opened and, on the other hand, the projection 22 is
3,063,355
4
pivoted out of the path of the collar 33. The galvanom
port bar it the pointer is within its useful range of piv
eter mounted on the arm 47 is also shifted, so that no
otal movement, thus causing movement of the arm which
releases the releasable locking means and allows \further
depression of the picture-taking release means to e?ect
deformation of the pointer 28 occurs. The release 32
can be moved further, after pivoting away of the locking
lever 21, and through the bell-crank lever 16 and the rod
picture-taking and wherein depression of the picture
34 can rotate the arm 9 further in the counter-clockwise
taking release means causes said drive means to rotate
direction, so that the locking pawl 10 drops behind the
arm 9. Thereupon the projection 49 pivots the catch
the diaphragm setting ring thereby sliding the setting
lever 51 against the spring 56v and causes it to release
port bar if the pointer is outside its range of pivotal
slider toward the arm and into said aperture of the sup
the shutter drive ring 52. Towards the end of the run 10 movement, the setting slider then operating the cut-out
means to stop the drive means, the releasable locking
ning-ofr" movement of the shutter drive ring 52 the dog
means remaining in engagement with the collar of the
35 strikes upon the push-rod 11 and rotates the locking
picture taking release means thus preventing further de
pression of said release means and preventing picture
pawl 10, so that under the action of the spring 56 the
arm 9 can disengage the claw 8 from the crown wheel 7.
In the case of a brightness which is not adequate for
taking.
3. In a camera having a housing and a diaphragm
a proper exposure, the pointer 28 is situated in a position
28a or 28b, in which the pointer 28 is not met by the
setting slider 18. The setting slider 18 consequently runs
setting ring rotatably mounted in the housing; the provi
olf without pressing the pointer 28 against the support
posure meter mounted on said arm, an exposure meter
rail 23. Then the dog 27 of the setting slider 18 strikes »
pointer pivotally mounted on said exposure meter, at
upon the interrupter 26, whereby the current circuit 42
is opened, and the electric motor 6 is switched oif. In
this case the locking lever 21 is not pivoted and the re
lease 32 remains blocked.
setting slider drivably connected to the diaphragm setting
ring and’ slidably mounted in the housing and having a
sion of an arm slidably mounted in the housing, an ex
width corresponding to the useful range of pivotal move
ment of said pointer, a ‘support bar formed on the arm and
having an aperture through which the setting slider can
pass, picture-taking release means mounted in the housing,
Apart from the example of embodiment as illustrated
the ring 14 can also be constructed as control ring, which
controls the setting members for diaphragm and ex
posure time according to a predetermined program.
I claim:
releasable locking means mounted in the housing, a collar
formed on the picture-taking release means which collar
is engaged by the releasable locking means to lock releas
ably said picture-taking release means, drive means in
cluding an electric motor for rotating said diaphragm
setting ring and an electric contact mounted on said loclt
ing means and arranged in the circuit of said electric
1. In a camera having a housing and a diaphragm set
ting ring rotatably mounted in the housing; the provision
of an arm slidably mounted in the housing, an exposure
meter mounted on said arm, an exposure meter pointer
pivotally mounted on said exposure meter, a setting slider
drivably connected to the diaphragm setting ring and
motor, wherein depression of the picture-taking release
35 energises the electric motor which drives the diaphragm
slidably mounted in the housing and having a width cor
responding to the useful range of pivotal movement of
said pointer, a support bar formed on the arm and having
an aperture through which the setting slider can pass,
picture-taking release means mounted in the housing, re 40
leasable locking means mounted in the housing, a collar
formed on the picture-taking release means which collar
is engaged by the releasable locking means to lock re
\leasably said picture-taking release means, and drive
means for rotating said diaphragm setting ring, wherein
depression of the picture-taking release means causes
setting ring thereby sliding the setting slider toward the
arm and entraining the pointer against the support bar if
the pointer is within its useful range of pivotal movement,
thus causing movement of the arm which releases the
releasable locking means thereby opening said contact to
de-energise the electric motor and stop the drive means
and to allow further depression of the picture-taking
release means to effect picture-taking.
4. In a camera having a housing and a diaphragm
setting ring rotatably mounted in the housing; the provi
sion of an arm slidably mounted in the housing, an ex
said drive means to rotate the diaphragm setting ring
posure meter mounted on said arm, an exposure meter
thereby sliding the setting slider toward the arm and
pointer pivotally mounted on said exposure meter, a set
entraining the pointer against the support bar if the
ting slider drivably connected to the diaphragm setting ring
pointer is within its useful range of pivotal movement, 50 and slidably mounted in the housing and having a width
thus causing movement of the arm which releases the
corresponding to the useful range of pivotal movement
releasable locking means and allows further depression
of said pointer, a support bar formed on the arm and
of the picture-taking release means to effect picture
having an aperture through which the setting slider can
taking.
pass, picture-taking release means mounted in the hous
2. In a camera having a housing and a diaphragm 55 ing, releasable locking means mounted in the housing,
setting ring rotatably mounted in the housing; the pro
a collar formed on the picture-taking release means which
vision of an arm slidably mounted in the housing, an ex
posure meter mounted on said arm, an exposure meter
collar is engaged by the releasable locking means to lock
releasably said picture-taking release means, drive means
pointer pivotally mounted on said exposure meter, '21 set
including an electric motor for rotating said diaphragm
ting slider drivably connected to the diaphragm setting 60 setting ring and an interrupter arranged in the circuit of
ring and slidably mounted in the housing and having a
the electric motor and operable by the setting slider for
width corresponding to the useful range of pivotal move
stopping said electric motor, wherein depression of the
ment of said pointer, a support bar formed on the arm
and having an aperture through which the setting slider
picture-taking release means causes said drive means to
rotate the diaphragm setting ring thereby sliding the setting
can pass, picture-taking release means mounted in the 65 slider toward the arm and entraining the pointer against
housing, releasable locking means mounted in the hous
ing, a collar formed on the picture-taking release means
the support bar if the pointer is within its useful range of
pivotal movement, thus causing movement of the arm
which collar is engaged by the releasable locking means
which releases the releasable locking means and allows
to lock releasably said picture-taking release means, drive
means for rotating said diaphragm setting ring and cut 70 further depression of the picture-taking release means to
effect picture-taking, and wherein depression of the picture
out means operable by the setting slider for stopping said
taking
release means causes said drive means to rotate
drive means, wherein depression of the picture-taking
release means causes said drive means to rotate the dia
phragm setting ring thereby sliding the setting slider to
ward the arm and entraining the pointer against the sup
the diaphragm setting ring thereby sliding the setting slider
toward the arm and into said aperture of the support bar
it the pointer is outside its range of pivotal movement,
3,063,855
5
the setting slider then operating the interrupter to stop the
electric motor, the releasable locking means remaining in
engagement with the collar of the picture taking release
means thus preventing further depression of said release
means and preventing picture taking.
5. In a camera having a housing and a diaphragm
setting ring rotatably mounted in the housing; the provi
6
for rotating said diaphragm setting ring and a locking
device for locking the diaphragm setting ring in any posi
tion, wherein depression of the picture-taking release
means causes said drive means to rotate the diaphragm
setting ring thereby sliding the setting slider toward the
arm and entraining the pointer against the support bar if
the pointer is within its useful range of pivotal movement,
thus causing movement of the arm which releases the
releasable locking means and allows further depression of
pointer pivotally mounted on said exposure meter, a setting 10 the picture-taking release means to operate said locking
sion of an arm slidably mounted in the housing, an
exposure meter mounted on said arm, an exposure meter
slider drivably connected to the diaphragm setting ring
device and lock the diaphragm setting ring in the set posi
tion and to effect picture-taking.
and slidably mounted in the housing and having a width
7. In a camera having a housing and a diaphragm
corresponding to the useful range of pivotal movement of
setting ring rotatably mounted in the housing; the provi
said pointer, a support bar formed on the arm and having
an aperture through which the setting slider can pass, pic 15 sion of an arm slidably mounted in the housing, an ex
posure meter mounted on said arm, an exposure meter
ture-taking release means mounted in the housing, releas
pointer pivotally mounted on said exposure meter, a
able locking means mounted in the housing, a collar formed
setting slider drivably connected to the diaphragm setting
on the picture-taking release means which collar is engaged
ring and slidably mounted in the housing and having a
by the releasable locking means to lock releasably said
picture-taking release means, an electric motor mounted 20 width corresponding to the useful range of pivotal move
ment of said pointer, a support bar formed on the arm and
in the housing and a detachable coupling arranged to con
having an aperture through which the setting slider can
pass, picture-taking release means mounted in the hous
ing, releasable locking means mounted in the housing, a
depression of the picture-taking release means causes the
coupling to connect drivably the electric motor to the 25 collar formed on the picture-taking release means which
collar is engaged by the releasable locking means to lock
diaphragm setting-ring and causes the electric motor to be
releasably said picture-taking release means, drive means
energised to rotate the diaphragm setting ring thereby
for rotating said diaphragm setting ring and a locking de
sliding the setting slider toward the arm and entraining
nect drivably said electric motor to the diaphragm setting
ring for rotating said diaphragm setting ring, wherein
the pointer against the support bar if the pointer is within
its useful range of pivotal movement, thus causing move
ment of the arm which releases the releasable locking
means and allows further depression of the picture-taking
release means to effect picture-taking.
6. In a camera having a housing and a diaphragm
vice for locking the diaphragm setting ring in any posi
tion, wherein depression of the picture-taking release
means causes said drive means to rotate the diaphragm
setting ring thereby sliding the setting slider toward the
arm and entraining the pointer against the support bar if
the pointer is within its useful range of pivotal movement
setting ring rotatably mounted in the housing; the provi< 35 thus causing movement of the arm which releases the
releasable locking means and allows further depression
of the picture-taking release means to operate said locking
device and lock the diaphragm setting ring in the set
pointer pivotally mounted on said exposure meter, a set
position and to e?ect picture-taking, said locking device
ting slider drivably connected to the diaphragm setting
ring and slidably mounted in the housing and having a 40 being released on completion of the picture-taking opera
sion of an arm slidably mounted in the housing, an ex
posure meter mounted on said arm, an exposure meter
width corresponding to the useful range of pivotal move
tion.
ment of said pointer, a support bar formed on the arm
and having an aperture through which the setting slider
can pass, picture-taking release means mounted in the
housing, releasable locking means mounted in the housing, 45
a collar formed on the picture-taking release means which
collar is engaged by the releasable locking means to lock
releasably said picture-taking release means, drive means
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,780,971
2,931,282
2,943,545
Fahlenberg ___________ __ Feb. 12, 1957
Owens _______________ __ Apr. 5, 1960
Fahlenberg ____________ __. July 5, 1960
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