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. Y17, 1946.
2,412,559
J. BoLsEY
SHUTTER ACTUATING MECHANISM
Filed Jan. 27, 1944
ì
5 sheets-sheet 1
1
.T
il
Dec. 1.7, 1946.
J. BoLsi-:Y
2,412,559
SHUTTER ACTUATING MECHANI'SM
Filed `Jan. 27, 1944
5 Sheets-Sheet 2
Dec. 17, 1946.
J. BoLsEY
’
2,412,559
SHUTTER ACTUATING MECHANISM
Filed Jan. 27, 1944
5 Sheets-Sheet 3
INVENTOR:
JACQUES BOLSEY
_
`
Dec. y17, 1946.
.1. BoLsEY
2,412,559
SHUTTER ACTUATING MECHANISM
Filed Jan. 27, 1944
"V
5 sheets-sheet 5
l
INVENTOR. '
„y Z‘wß‘“ @Mv
l
N
gi;
Patented Dee. 17, 194s
_ _2,412,559
UNITED s'rirres~ PATENT omer.
2,412,559
l, __ SHUTTER ACTUATING MECHANISM
Jacques Bolsey, New York, N. Y. ~
Application January 27, 1944, Serial No. 519,902
14 claims.
l
My present invention relates to shutter actuat
ing mechanisms and more particularly to. mecha
nisms for operating so called sliding reciprocating
shutters.
2
actuating mechanism also comprises means for
moving the shutter blade past Áthe exposure aper
ture of the camera against action of the coiled
shutter spring mentioned above, means for hold
lit is an object of my present invention to pro
vide a shutter mechanism which is extremely sim
ple in construction, easy to operate and reliable
ing this shutter blade in its wound-up position
1n use.
means adapted to be moved into the path of the
_shutter blade so as to hold the .same in operative
position with the shutter aperture in register with
the exposure aperture of thecamerag'in accord
ance with' my present invention, these blocking
means are movably, preferably turnably, secured
tothe camera body; furthermore, 'i provide means
It is a further object of my present invention
to provide e, shutter mechanism which is con
trolled by one single setting knob.
It is still a further object of my present in
vention to provide a shutter mechanism which is
very compact and can be removed as a single unit
from the camera body for examination and re
pairs, if necessary.
With the above objects in view, my present
invention mainly consists of a shutter actuating
mechanism comprising a manually operated set
‘ing member for setting the various longer and
shorter exposure times, spring means for moving
the shutter blade past the exposure aperture of
the camera, means controlled by the setting mem
ber for varying the tension of the above-men
tioned spring means so as to increase the spring ~
tension when the exposure time has to be short
ened, and delayed action means for reducing, at
least during the longer exposure times, the'speed
of the shutter blade while the same is moved by
'
(Ci. 95-55)
and to release the same for operative movement
past the exposure aperture, ‘and movable blocking
operatively,v connecting the settmg member de
scribed above with this movable suppûrting mem
ber in such a manner as to enable movement of
the blocking means movably carried by this sup
porting member into such a position as to be
adapted to ‘be moved by the releasing means men
tioned above into the path of the shutter blade
when the same is released by movement of these
releasing means. Thus, movement of the releas
ing means simultaneously releases the shutter
blade for operative exposing movement and moves
the blocking means into the path of this shutter
blade so that the shutter blade is held in expos
ing position with the shutter aperture superim
posed upon the exposure aperture ci’ the camera;
the spring means past the exposure aperture. 30 when said releasing means then are allowed to
The spring members used for the purposes of the
return to their initial'pcsition, the blocking means
present invention is preferably a'relatively long
move out of the path of the shutter blade and
coiled spring and the delayed action means pref
the same »moves on, closing the exposure aper
erably comprise a gear member and braking
ture. Thus, by regulating the length of time of
means engaging the teeth of this gear member.
oœration of the releasing means, it is possible to
As set forth above, preferably the length of the
regulate the length of bulb exposures. Time ex
shorter exposure times is controlled exclusively
. posures are also obtained in similar` manner which
by the tension of this coiled spring while the
will be described below in detail.
length of the longer exposure times is controlled
The novel features which I consider as char
by the number of teeth engaging the braking
acteristic for my inventionare set forth in par
means delaying turning of the delaying gear
ticular in the appended claims. The invention
member.l Thus, the length of the shorter expo
itself, however, both as to its construction and
sure times is varied by the setting member, e. g.
its method of operation, together with additional
setting knob, by variation of the/tension` of the
objects and advantages thereof, will be best un
coiled spring while the length of the longer ex
derstood from the following description oi' spe
posure times is varied by change of the number
cific embodiments when read in connection with
of teeth of the toothed gear member engaging
the accompanying drawings, in which:
the braking means. In accordance with the
Figure 1 is a rear view of the entire shutter
present invention al1_ these variations are carried
mechanism, with the shutter blade and obtura
out exclusively by turning of a single setting
tion blade shown in dotted lines;
y
knob.
Figure 2 is a cross section through the shutter
My present invention'furthermore comprises
mechanism shown in Figure 1, along line 2--2 of
the provision of means for enabling. bulb and
Figure l;
time exposures' which are controlled by the same
Figure 3 is a cross section through the same
letting knob. For this purpose, the shutter blade
shutter mechanism, along line 3-3 of Figure l;
2,412,559
3
4
Figure 4 is a cross section ,through the same
spring is considerable. Thus, it is possible to
shutter mechanism, along line d-ß’i of Fig. 1;
vary the tension of spring 25 by means of set-4
Figure 5 is a. bottom viewpartly in section of
ting knob 30 within such limits as to obtain ex
posure times varying between 1/iuo and 1/moo of
l the shutter mechanism shown in Figure 1;
Figure 6 is a top view of the same shutter
mechanism;
'
a second. For obtaining longer exposure times,
i. e. in order to decrease the shutter speed, I
have to provide separate delayed action means
'
Fig. 7 is a vertical section through the shutter
mechanism, along line l-l of Fig. 2;
Fig. 8 is a partial vertical section through the
a, front compartment of the camera which is
combined with the coiled spring 25.
These delayed action means comprise mainly
a toothed gear 4segment 33 turnably pivoted to
front wall Iû by means of pivot 34 as clearly
shown in Figure 2. The torsional spring 35 is
wound upon the sleeve vmember 36 which latter
is attached to the toothed gear segment 33; this
formed by the compartment front wall ill, the
top wall II and the bottom wall i2; both walls
spring 35 is secured at its one end to this sleeve
member 3S and at its other end at 3l to the front
il and l2 are secured to front- wall lll.
wall it, urging segment 33 to turn about pivot
shutter mechanism, along line 8-8 of Fig. 2; and '
Fig. 9is a horizontal section along line 9--9 ot’
Fig. 2.
.
The entire shutter mechanism is mounted into
These
three walls carry the entire shutter actuating
mechanism and simultaneously form the front
part of the camera,- not shown in the drawings.
They are secured to the camera body by screws
entering screw holes i3, lll, l5 and i6 in the top
`wall Il and bottom wall i2, respectively, and
can be removed together with the shutter mech
anism as a separate unit, whenever required.
The main part of the entire shutter mecha
nism is the shutter blade Il guided in grooves
i8 and i9 provided in the top and .bottom walls
il and i2, respectively. This shutter blade Il is
provided with a shutter aperture 2U shown in
Figure 1 in dotted lines. The guiding grooves
i8 and I9 extend all over the length of top and
bottom walls ll and i2 thereby enabling sliding
or the shutter blade in direction of arrow 33
along the entire length of these walls from one
3ft in direction of arrow 38. Thus, whenever seg
> ment 33 is turned against direction of arrow 38
20 and then released, it automatically returns into
its initial position shown in Figure l.
In order to adjust the length of exposure times
it is necessary to regulate this initial position of
gear segment 33. This is done by providing gn
25 the rear face of segment 33 a semi-circular pro
jection 39yengaging pin d0 secured to lever di
as -shown in Figures l and 2. This lever lll is
turnably secured to front wall lll> by means of
pivot 32 urged in direction of arrow ¿i5 by means
30 of torsional spring ¿i3wound upon sleeve ed, and
turned about pivot ¿l2 by pin 56 engaging edge
-élî of this lever against direction of arrow d5,
whenever pin d6 is moved against this lever edge
All. This pin il@ is secured rigidly connected with
35 setting knob 3E by means of the intermediate
side of the exposure aperture 2l of the camera to
the other side thereof and back.
„
.
A second obturation shutter 22 is’also provided,
closing the shutterl aperture 20 during move
ment of the shutter blade il against direction of
arrow 63 past the exposure aperture'Z I, while this
shutter blade il is slid into the so-called initial.
wound-up position ready for exposure. The ob
cam member ¿i3 serving also for other purposes
described below in detail, and screw 29 to which
the latter member ¿33 is secured. Thus, it is pos
sible to turn pin 135 about the pivoting axis of
setting knob 3U by turning this setting knob.
This turning movement of pin 46 will result ’
in pressurev of pin d6 against edge- lll of lever
arm-di, turning the same against direction of
turation shutter 22 is also provided with an ap
arrow 65. This movement of lever arm lli will
erture 23 corresponding in size to the exposure ‘
result in pressure of Vpin ¿lo against projection
39 on segment 33, turning this segment about
pivot 33 against direction of arrow 38. Thus, it
is possible to_turn the toothed gear segment 33
about its pivot 3d against direction of arrow 33
by turning knob 3o and to vary the so-called
initial position of this toothed gear segment.
The thus obtained initial -position of the toothed
aperture 2'! and designated in Figure 1 with the
same outline as the latter. _
It should be mentioned ‘that front wall itl is
also provided With an aperture 2li in front of
exposure aperture 2i so as to enable light to reach '
the lens within the camera body through the su
perimposed apertures 2i and 23 when shutter
blade ll and obturation shutter 22 are in opera
'tive position.
,
'
The main means for moving the shutter blade ~
il during exposure is the coiled spring 25 se
cured at its one end to pin 25 secured to the shut
ter blade il as shown 4in Figures 1 and 4 and
secured at its other end by pin 2l to pulley 23
connected by screw 29 with setting knob 33, which 60
gear segment will be the one into which it will
always tend to return by action of spring 35 if
turned against direction of arrow 38.
It is evi
dent that when pin 46 is turned by setting knob
30 in such a direction as to decrease its pressure
against lever arm lli, the same will be turned by
the torsional spring 43 together with pin ¿Il se
cured to it in direction of arrow ¿55, thus follow
ing this pin and enabling the toothed gear seg
latter is rotatably journalled-in front wall il).
ment 33 to turn in direction of arrow 38.
Thus, by turning the setting knob 30 the length
of the coiled spring 25 is varied and its tension
A further element of the delaying action means
decreased or increased according to the direction
used in the mechanism is a pawl 50 engaging with
of turning of knob 3U. Since during elongation 65 its projections 5i and 52 the teeth 53 of the
of spring 25 part of the same is wound up on
toothed gear segment 33 in the way shown in
pulley 28, the active length of this spring is si
multaneously decreased, thereby additionally in
creasing the spring tension. In order to increase
k the length of spring 25, the same is guided over
the two guiding rollers 3l and 32 as shown in
Figures l and 6.
It is evident that such a coiled‘spring 25 is
_only adapted for obtaining the shorter exposure
times since the shutter speed caused by Such a
Figure 1. This pawl 53 is freely turnably secured
to pivot 42 by pin 54. It is evident that a pawl
of this type will brake the speed of turning'of
the toothed gear segment 33 when the same'is
turning about its pivot 33 in either direction.
In order to obtain influence of the above de
scribed delayed action means on the movement
of the shutter blade, I provide on the shutter
blade il the double-armed operating lever 55
2,419,559
shown in Figures 1 and 3. This operating lever
is freely turnably pivoted to the shutter blade
I1 by means of pivot 55 and urged by leaf spring
20 is larger than the exposure aperture 2l and
lever 55 is arranged in such a manner that lever
arm 5| strikes against projection 62 at that
moment when shutter opening 20 is in front of
51 to tum in direction' oi'> arrow 58. Such turn
ing movement of the double-armed lever 55 is Ul exposure aperture 2|, this exposure aperture will
limited by pivot 58 of leaf spring 51 against which
be open and exposure will continue during the
the lever arm 5|! of the double-armed lever 55
yentireperlod needed for movement of segment 33
_is pressed rby the leaf spring 51. Thus, the other
` from its initial into its final position. Thus, this
lever arm 8| of the double-armed lever 55 can
not move further in direction of arrow 58 than
segment and the pawl 50 >connected with- it will
result in extension of the exposure time, making
shown in Figure 1 but it can turn about pivot
longer exposures possible.
55 against direction of arrow 53 if forced to do
_Everybody skilled in this art will easily under
so. If released after such turning'movementV
stand that by reducing the number of those teeth
against direction of arrow 58, this lever arm 8| .. vf of segment 33 which engage pawl 50 during its
returns into its initial position, shown in Figure 1,
movement from initial into final position it is
by action of leaf spring 51.
'
possible to vary the period of time during which
'The last element necessary to obtain the re
movement of shutter blade l1 is delayed, i. e.
quired cio-operation between this operating
the time during which shutter aperture 20 is
double-armed lever 55 -on shutter-blade I1 and
in front of exposure aperture 2l. Thus, it is
the toothed gear member-33Í is a projection 62 20 possible to vary the length of the longer exposure
on this gear segment arranged inA such a manner ' «times by varying the initial position of gear
as to be in the path of lever arm 5i .of the double
segment 33. This will result in variation of the
armed lever55 when the shutter blade i1 carry
=number of gear teeth 53 engaged by pawl 5@
ing lever 55 is moving in direction ci arrow 63
during turning of gear segment 33 from the thus
during exposure.
obtained different initial positions into its end
The above described means for setting theex
position.
posure time operate as follows:
,
Such adjustment of the initial position of gear
l. When short exposure times are required,
segment 33-oan easily be attained by the ad
the setting knob te is turned soasto turn by
justing means described above, namely by means
means of pin t@ the lever di against direction of
of pin 46, lever di, pin dû, and projection 39:
arrow
into such a position that this lever di
Thus,` by turning setting knob 3d in an ap
on its part turns by means of pin d@ and projec
propriate way, it is possible to turn pin ¿it about
tion the toothed gearsegment against direc
pivot 29 as explained above, thus pressing this Y
tion of 'arrow
into the end position shown in
pin against the edge 4l of lever lli, thereby
» Figure i in dotted lines.
this end position, 35 pushing pin di] against projection 35 and turn
projection 552 on gear member
is outside of
ing segment 33 to which this projection is
the path of lever
di and thus sliding of the
secured against direction of arrow 38. Since it
shutter blade i? is not infduenced by the gear
is possible to turn pin d6 by means of setting knob
segment
forming part of the delayed action
3d in such a manner as to obtain any desired
means. After this end position oi the toothed ‘il position of gear segment 33 between the posi
gear 'segment
is reached, tension of the coiled
tions shown in full lines and that shown in dotted
spring
is adjusted by turning setting knob Sii
lines, it is lalso possible to adjust, by means or“
as required, i. e. the tension of spring 25 is in
this setting knob, the longer exposure times of
creased if very short and decreased if so called
short exposure times are desired. 'in this way,
shutter blade i1 within wide limits, i. e. within
the very long exposure time obtained by the
exposure times between 1/100 and ’Aoco of a second
delaying movement of segment 33 from its initial
be obtained°
.
position shown in full lines into its end position
2. if ionger exposure tiines’are required,l the
shown in dotted lines and the practically un
setting knob ‘do is :moved so that the toothed
delayed exposure time or” the shutter obtained
gear segment 33 is turned in directionof arrow 60 if segment 33 is turned into an initial position
33, thereby moving projection t2 secured to seg
near its end position, shown in Figure 1 in dotted
ment
into the path of lever arm @i of the
lines already before start of the movement of
operating double-armed lever 55 secured to shut
the
shutter.
biade i?.
I wish to mention that for arming the shutter
Now, it is evident that if for instance segment 55 spring, i. e. for moving the shutter blade i1 into
is in its position shown in Figure l in full
its initial position shown in Figure l in dotted
lines, the iever arm di which is secured to shutter
lines, I use-knob 65 and connecting member 'M
_blade il, as explained above, will strike the propassing through slot 55 in front wall il! and slot
jection during its operative movement in direc
51 in the shutter blade il. If this knob is moved
tion of arrow b3. Since shutter blade il is mov
in direction of arrow 58 as shown in Figure 5,
ing in direction of arrow 53 ’by action of coiled
the shutter blade il is moved into its initial posi
spring 25 which is substantially stronger than
tion shown in Figure 1 stressing thereby spring
the torsional spring 35 turning( segment 33 in
25 and increasing its tension. In this initial
direction of arrow 38, the lever arm 6l will push,
position, the shutter blade I1 isv held by pro
by action of spring 25, the projection S2 against 65 jection 59 on releasing member l0. `This pin B9
action of spring 35 in direction of arrow 53,
is adapted to engage pin 12 secured to shutter
thereby turning gear segment 33 against direc
blade
I1, holding the same in its initial position.
Ation ci arrow 38.
'
I wish also to mention that the obturation
This turning movement, however, is braked by
shutter 22 is arranged parallel to 'shutter blade
pawl 50, limiting the speed of the same. Thus, 70 i1 and firmly connected by means of screw 13
it will take a certain time until segment 33 moves
vto connecting member 14 which latter, as ex
from its initial position shown in full lines into
plained above, passes through slot 66 in front
its end position, shown in Figure 1 in dotted lines.
wall I0 and slot 61 in shutter blade I1. This
During this time, the shutter will move only a
obturation shutter 22 is provided with a sep
very short distance. Since the shutter opening' 75 arate coiledspring 15 passing over guiding roller
i.
2,412,559
7
8
in Figure 1.
,
'
.
jection 98 into the .path of projection ‘l2 on
I8 and pulling it back into its initial position at
the left side of theexposure aperture 2| as shown
shutter blade I?. However, also inthis case it is
necessary to limit movement >of the pivot 89 of
»
blocking member 88 'in such a manner that the
In order to obtain also bulb and time exposures,
i. e. in order to make it possible to expose for
half .a second or longer, I have to provide ad
ditionalv means to prevent movement of the
catch projection 98 is slightly below the level 'of
projection. 'l2 on shutter blade Il.; thus, if the
shutter blade is released by pushing down the re
leasing member 18, the catch projection 98 is
shutter blade while the shutter aperture is in
- turned exactly into the path of the projection '|2
front of the exposure aperture of the camera.
For this purpose I use lever 8U which is turn l0 on the shutter blade |'|.
The above described means for obtaining bulb
ably pivoted .to the top wall || by means of '
and time exposures of desired length are operated
pivot 8| in the way shown in Figures 1 and 3.
as follows:
.
'I‘he tip 98 of lever arm 82 ‘of this lever 88 is
permanently pressed against the peripheral face
81| of the cam-like member «i8 by means of springs
83 and 83’. This cam-like member 48 is pro
vided with a recess 85 for the purposes described
below. In the position shownin Figure l, tip
98 of lever arm 82 of the lever 80 presses against
. 1. If lt isrequired to keep the exposure aper
ture open while the releasing member 'i8 1s
pressed downward, i. e. to make a bulb exposure,
it is necessary to turn lever 88 in such a manner
that catch projection 9| is slightly under the
path of projection 12 on shutterA blade l1 as ex
20 plained above. This position of lever 88 can be
the annular'portion 86 of the peripheral face 88
obtained by suitable adjustment of the position
of the cam-like member 48 and is thus held by
of the cam-like member 48 _by means of the set
this member 48 in a position enabling regulation
ting member 30 to which it is secured.
of the length of exposure time by the means de
' If the setting member is turned in clockwise
scribed above in detail.
Lever 88 is provided besides lever arm 82 also 25 direction, such a turning movement will cause
turning of the cam-like member 88 about its axis
with lever arm 81, carrying at its end freely
turnably mounted the blocking member 88 which
in the same direction, and the same will face the
tip 98 of lever arm 82 with its recessed portion
is secured to it by means of pivot 89, as shown
85. This will result in .turning of lever 8|) about
in Figure l. This blocking member 88 is pro
its pivoting point 8| by action of spring 83. Now,
vided with two catch projections 90 and 9| shaped
if setting member 30 is adjusted in such a man
and arranged as shown and also provided with
ner that tip 98 of lever arm 82 contacts the middle
slot 92, engaging pin 93 arranged on releasing
portion 99 of the receding peripheral face 84 of
member 18.
It is evident that by turning lever 8l) about
the cam-like member' 4S, the lever arm ,80 will be
in such a position that blocking member 88 is
its pivoting point 8| in direction of arrow 9d,
somewhat lifted with catch Iprojection 9| slightly
it is possible to lift pivot 89 _and blocking mem
under the path of projection 'il on shutter blade
ber 88 held «by it. Such movement of pivot 89 in direction of arrow 95 will result also in turn
Il.
ing of blocking member 88 about this pivot 89v
l
-
If, after adjusting the blocking member 89' in
in direction Aof arrow 98: this turning move 40 this way, shutter blade il is moved into its initial
position shown in Figure l and then released by
ment is caused by pin 93 which is stationary
>pushing down the releasing member l0, projec
and sliding in slot 92 forces blocking member
tion'72 on the shutter blade Il will strike against
88 to turn about pivot 89. This combined turn
ing and raising of the blocking member 88 will
also result in a similar movement of the catch
projections 98 and 9|, so that the same will
move in direction of arrow 95.
The extent of such movement of the catch
projections 98 and 9| will depend on the extent
of turning of lever 88 about pivot 8|: if this »
lever is turned only slightly, it is Possible to
Ithe catch projection 98 which has been lifted by
the pushing down movement of releasing member
'lil into the path of projection 12. Thus, this
catch projection 9| will block further movement
of projection ‘l2 on shutter blade i1 and hold the
latter in operative position with its shutter aper
ture 2@ in front of the exposure- aperture 2| of
the camera. After the shutter has been held in
_ this operative position for the required length of
turn blocking member 88 in such a way that
catch projection 9| is in the path of pin 'l2 on
the shutter blade il if the releasing member
'l0 is pushed downward. I‘ wish to stress that i
if such eiïect is required, the blocking member
88 should not be turned so far that catch pro
jection 9| is in the path of projection 'l2 on
shutter blade Il already before downward move
ment of the releasing member 79. If this were
the case, pushing down of the releasing member
19 during releasing of shutter blade |`| would
still further -lift catch projection 9| by turning
blocking member» 88 about pivot 89 and thus
>move this catch projection- 9| out of and over
the path of projection ‘l2 on shutter blade |'|.
Thus, it is necessary for the purposes of the
lpresent invention to turn blocking member <88y
into a position in which catch projection 9| is
slightly below the level of projection l2 on
shutter blade Il if it is desired that during re
lease of this shutter blade this projection 9|
is in the path of the projection 'l2 on the shutter
blade Il.
Similarly, it is possible to lift also catch pro
time, the releasing member ‘i8 is allowed to return
into its initial position by action of spring |88.
As evident from above explanation this return
movement of the releasing member _18 will result
in >a turning .movement of blocking member 88
about pivot 89 in direction of arrow 95 which in
turn will cause ymovement of catch projection 9|
60' downward out of the path of projection 'l2 on
“shutter blade il; the thus released shutter blade
il' will continue in its sliding movement and close
the exposure aperture 2| of the camera.
2. If it is required to make a time exposure,
i. e. if it is desired to open the exposure aperture
2| by pushing down the releasing member 'I8 and~ y
to close the exposure aperture 2| only when the
releasing lever 10 is pushed down a second time,
f it is necessary to turn setting member 30 in such
a position that the cam-like member 48 contacts
tip 98 of lever arm 82 with the deepest part |8|
of recess 85, thereby enabling lever arm 88 to turn
by action of spring 83 still further in direction of
arrow 98, causing further lifting of pivot 89 in
direction of arrow 95. In this way, it is possible
ananas
-
to -move blocking member 88 into such a position
that when releasing member 10 is pushed down
10
limited to the details shown, since various modiil
cations and structural changes may be made
without departing in any way from the spirit of
ward, this blocking member 88 is turned about
pivot 89 into such a position that projection 12
my invention.
on shutter blade I1 strikes during its movement
in direction of arrow 63 against catch projection
‘
Without further analysis, the foregoing will so
fully reveal the gist of my invention that others
90 on this blocking member, preventing further
can by applying current knowledge readily adapt
movement of the shutter blade.
it for various applications without omitting fea
When the releasing member 10 is allowed lto
tures that, from the standpoint of prior art, fair
return into its initial position, blocking member 10 ly constitute essential characteristics of the ge
88 will turn, as explained above, in direction of
neric or specific aspects of this invention and,
arrow 95 and projection 12 on shutter blade I1
therefore, such adaptations should and are in
will become disengaged from catch projection 90
and the shutter blade I1 continue in its opera
tive sliding movement in direction of arrow 63.
However, the two catch projections 90 and 9| are
tended to be comprehended within the meaning
and range of equivalence of the following claims.
What I claim as new and desire to-secure by
Letters Patent is:
arranged relative to each other in such a manner
-
1. In a shutter blade actuating mechanism, a
shutter blade having a shutter aperture, a manu
.that when catch projection 90 returns by release
of releasing member 10 into its initial position,
ally turnable setting knob for setting the various
catch projection 9| turns downward into the path 20 longer and shorter exposure times for said shut
of projection 12 on shutter blade I1, thus pre
ter blade, a turnable winding drum .secured co
venting further movement of the same and keep
axially to said setting knob and operated by the
ing the exposure aperture open, as _explained
same, a coiled spring for moving said shutter
above.
t
blade past the`exposure aperture of a camera,
Thus, it is possible .to move blocking member 88
said coiled spring being attached at its one end
into such ,a position that by pushing down and
to said shutter blade and at its other end to said
releasing of releasing member 10, the shutter
winding drum and wound up partly upon the
blade I1 is moved into operative position and held ’
same-when said winding member isturned by said
in that position by catch projection 9|. In order
setting knob in such a manner as to stretch said
to release the shutter blade I1 after the required 30 coiled spring and .increase the tension of the
length of exposure time, it is only necessary to
same when said exposure time has to be sh0rt
push down the releasing member 10 again, there
ened, delayed action means for reducing during
by moving catch projection'ßI out of the path of
said longer exposure times the speed of said shut
projection 12 and enabling shutter blade I1 to
ter blade while the vsame is moved by said coiled
continue its operative movement under action of
spring past said exposure aperture, means for
shutter spring 25.
varying the delaying action of said delayed ac
The above described arrangement makes it pos
tion means as necessary for obtaining the re~
sible to obtain the most different shutter speeds
quired longer exposure time, and means for co
and exposure times in aniextremely simple way
operatively connecting said means for varying the
by means of a mechanism containing very few 40 delaying action with said setting knob so as to
parts (3o-operating with each other in `a very re
enable operation of said varying means and said
liable manner.
" '
It is evident that the above described shutter
mechanism might be combined with a counting
mechanism for counting theY exposures in a way
delayed action means influenced by the latter in
such a manner as to obtain during said longer
exposure times the required speed reducing action
of said delayed action means.
2. In a shutter blade actuating mechanism of
the type described, a shutter blade having a shut
ter aperture, a manually operable setting member
for setting the various longer and shorter ex
50 posure times for said shutter blade, a turnable
known to everybody skilled in the art, for in~
stance by arranging such a counting mechanism
in the path of the shutter blade I1 or another
part of the mechanism carrying out a predeter
mined movement during each to and fro move
ment of the shutter blade. A counting mech
anism of this type is shown in the drawings. This
counting mechanism consists of a ratchet wheel
Iilii arranged so as to turn each time the shutter
is moved. With this ratchet wheel IUS a shaft
IUS is connected which carries on its other end
the indicating dial I01. In order to prevent turn
ing of ratchet wheel |05 in_undesired direction, I
provide the pawl member I II) which is pivoted by '
means of pivot III to the housing-and engages 60
the teeth of the ratchet wheel |05 as shown.
Since the film is transported at the same time
when the shutter is armed, each shutter move
winding member operated at least rduring setting
of said various shorter` exposure periods by said
setting member, a coiled spring for moving said
shutter blade past the exposure aperture oi’ a
camera, said coiled spring being attached at its i
one end to said shutter blade and at its other end
-to said winding member and wound up partly
upon the same vwhen said winding member is
turned by said setting member in such a manner
as to stretch said coiled spring, said winding
member thus increasing the tension of said coiled
spring at least during said various shorter ex
posuretimes by stretching the same when said ex
ment is a clear indication for the number of film
posure time has to be shcrtenedyand delayed ac
exposures.. I wish to stress that this counting
tion means for reducing the speed of said shutter
mechanism does not form part of the invention
blade while the shutter aperture in said shutter
claimed by me in the appended claims.
'
blade is in register with said exposure aperture oi
It will be understood that each of the elements
said camera, said delayed action means compris
described above, or two or more together, may
ing a turnable toothed member, a braking mech
also iind a useful application in other types of 70 anism adapted to engage the teeth of said toothed
shutter mechanisms differing from the types de
member and to limit the speed of turning of the
scribed above.
latter, means operatively connecting said toothed
While I have illustrated and described the in
member with said shutter blade while the same is
vention as embodied in so-called sliding recipro
moved by said coiled spring past said exposure
cating shutter mechanisms, I do not intend to be 76 aperture of said camera and said shutter aperture
2,412,559
11
in said shutter blade is in register with said ex
posure aperture, and means operated by said set
ting member for turning said toothed member
during setting of said various longer .exposure
times and thereby varying the number of teeth
of said toothed member engaging during turning
of the same said braking mechanism and varying
also simultaneously the time of speed limitation
of said toothed member, thus enabling variation
of the length of time of speed reduction of said
toothed member and of said shutter blade opera
tively connected with said toothed member dur
ing said longer exposure times of said shutter
blade.
shorter exposure times, and delayed action means l
for reducing the speed of said shutter blade while
during said longer exposure times thev shutter
aperture on said shutter blade is in register with
said exposure aperture of said camera, said de
layed action means comprising a turnable toothed
member, a supporting member supporting said
4toothed member freely turnably between two end
positions, spring means urging said toothed mem
ber into one of said end positions, a braking
mechanism adapted to engage the teeth of the
toothed member and to limit the speed of turning
'of the latter,- means operatively connecting said
toothed member with said shutter blade While the
same is moved by said shutter blade moving
means past Said exposure aperture of said camera
ally turnable setting Aknob for setting the various
and said shutter aperture in said shutter blade is
longer and shorter exposure times for said shutter
in register with said exposure aperture of said
blade, a turnable winding drum mounted co
camera, and means operatively connected with
axially with said setting knob and' operated at 20 said turnable setting knob for turning during
least during setting of said various shorter ex
setting of said longer` exposure times of said shut
posure times by the same. a coiled spring for
ter blade said supporting member and said` toothed
3. In a shutter blade actuating mechanism, a
shutter blade having a shutter aperture, a manu
moving said shutter -blade " past the exposure
member carried by the same and thereby vary
ing the number of .teeth of said toothed member
tached at its one end to said shutter blade and 25 engaging during turning of the same said brak
at its other end to said winding drum and wound
ing mechanism and varying also simultaneously
up partly upon the same when said winding mem
the time of speed limitation of said toothed
ber is turned by said setting knob in such a man
member, thus enabling variation of the length
ner as to stretch said coiled spring and increase
of time of speed reduction of said toothed mem
the tension of the same When said exposure time 30 ber and of said shutter blade operatively con
has to be shortened during said various shorter
nected with said toothed member during said
exposure times, and delayed action means forv
longer exposure times of said shutter blade.
reducing the speed of said shutter blade while
5. In a shutter blade actuating mechanism of
during said longer exposure »times the shutter
the type described, a shutter blade, a manually
aperture on said shutter blade is in register with
operable setting member for setting the various
said exposure aperture of said camera, said de
longer and shorter exposure periods and the so
layed action means comprising a turnable toothed
called time exposure for said shutter blade, a
member, al braking mechanism adapted to en
turnable winding member operated at least dur
gage‘the teeth of said toothed member and to
ing setting of said various shorter exposure peri
limit the speed of turning of the latter, means 40 ods byl said setting member, a coiled spring for
operatively connecting said toothed member with
moving said shutter blade past the exposure aper
said shutter blade while the same is moved by
ture of a camera, said coiled spring being at
said coiled spring past said exposure aperture
tached at its one end to said shutter blade and
of said camera and said shutter aperture in said
at its other end to said winding member and
shutter blade is in register with said exposure 45 wound up partly upon the same when said Wind
aperture, and means operatively connected with
ing member is turned‘by said setting member
said turnable setting knob for turning during
in such a manner as to stretch said coiled spring
setting of said longer exposure times of said shut
at least during said various shorter exposure
ter blade said toothed member and thereby vary
periods by- stretching the same when said ex
„ ing the number of teeth of said toothed member
posure period has to be shortened, delayed action
engaging during turning of the same said braking
means for reducing the speed of said shutter
mechanism and varying also simultaneously the
blade while the shutter aperturevin said shutter
time of speed limitation of said toothed member,
blade is in register with said exposure aperture
thus enabling variation of the length of time of
of said camera, said delayed action means com
speed reduction of said toothed member and of 55 prising a turnable toothed member, a braking >
said shutter blade operatively connected with l
mechanism adapted to engage the teeth of said
said toothed member during said longer exposure
toothed member and to limit the speed of turning
times of said shutter blade.
of the latter, means operatively connecting said
4. In a shutter blade actuating mechanism, a
toothed member with said shutter blade while the
shutter blade having a shutter aperture, a manu 60 same is moved by said coiled spring past said
ally turnable setting knob for setting the various
exposure aperture of said camera and said shutter
longer and shorter exposure times for said shut
aperture in said shutter blade is in register with
ter blade, a turnable winding drum mounted co
said exposure aperture,` and means operated by
aperture of a camera, lsaid coiled spring being at
axially with said setting knob and operated at'
said setting member for turning 'said toothed
least during setting of said various shorter ex 65 member during setting of said various longer
posure times by the same, a coiled spring for
exposure periods and thereby varying the num
moving said shutter blade past the exposure aper
ber of teeth of said toothed member engaging
ture of a camera, said coiled spring being at
during turning of the same said braking mech
anism and~varying also simultaneously the time
tached at its one end to said shutter blade and `
at its other end to said winding drum and wound 70 of >speed limitation of said toothed member, thus
up partly upon the same when said winding mem
enabling variation of the length of time of speed
ber is turned by said setting knob in such a
reduction of said toothed member and of said
manner as to stretch said coiled spring and in
shutter blade operatively connected with said
crease the tension of the same when said exposure
toothed member during said various longer ex
time has to be shortened during said various 75 posure periods of said shutter blade, movable
9,419,559
.
13
blocking means adapted to be moved into the
path of said shutter blade so as to hold the same
14
‘
shutter blade, a manually turnable-setting knob
for setting the various longer and shorter ex
posure periods and the so-called time exposure
in register with said exposure aperture of said
for said shutter blade, a turnable winding- drum
camera, and means operatively connecting said 5 mounted co-axially with said setting knob and
setting member with said movable blocking means
operated at least during setting of said various
in operative position with said shutter aperture
so that said setting member moves said movable
shorter exposure periods by the same, a coiled
blocking means into operative position in the path , spring for moving said shutter blade past the
Vof saidshutter blade when said setting member
exposure aperture of a camera, said coiled spring
is in time exposure setting position.
10 being attached at its one end to said shutter blade
6. In a shutter blade actuating mechanism of
and at its other end to said winding drum and
the type described, a shutter blade, a manually
wound up partly upon the same when said wind
operable setting member for setting the various
ing member is turned by said setting knob in such
longer and shorter exposure periods and the so
a manner as to stretch said coiled spring and in
called time exposure for said shutter blade, a 15 crease the tension of the same when said exposure
turnable winding member operated at least dur
ing setting of said various shorter exposure
periods by said setting member, a coiled spring
for moving said shutter blade past the exposure
aperture of a camera, said coiled spring being at 20
tached at its one end to said shutter blade and at
its other. end to said winding member and wound
up partly upon the same when said winding mem
ber is turned by said setting member in such a
manner as to stretch said coiled spring at least 25
during said various shorter exposure periods by
period has to be shortened during said various
shorter exposure periods, delayed action means
for reducing the speed of Ásaid shutter blade while
during said longer exposure periods the shutter
aperture on said shutter blade is in register with
said exposure aperture of said camera, said de
layed action means comprising a turnable toothed
member, a braking mechanism adapted to en
gage the teeth of said toothed member and, to
limit the speed of turning of the latter, means
operatively connecting said toothed member with
stretching the same when said exposure period
said shutter blade while the «same is moved by
has to be shortened, delayed action means for
said coiled spring past said exposure-aperture of
reducing the speed of said shutter blade while
said camera and said shutter aperture in said
the shutter aperture in said shutter blade is in 30 shutter blade is in register with said exposure
register with said exposure aperture of said - aperture, and means operatively connected with
camera, said delayed action means comprising a
said turnable setting knob for turning during turnable toothed member, a braking mechanism
setting loi? said 'longer exposure periods of said
adapted to engage the teeth of said toothed
shutter blade said toothed member and thereby
member and to limit the speed of turning of the 35 varying the number of teeth of said toothed
latter, means operatively connecting said toothed
member engaging during turning of the same
member with said shutter blade while the same
said braking mechanism and varying also simul
is moved by said coiled spring past said exposure
taneously the time of speed limitation of said
aperture of said camera and said shutter aper
toothed member, thus enabling variation of the
ture in said shutter blade is in register with said 40 length of time of speed reduction of said toothed
exposure aperture, and means operated by said
member and of said shutter blade operatively
setting member for turning -said toothed mem
connected with said toothed member during said
ber during setting of said various longer exposure
longer exposure periods of said shutter blade,
periods and thereby varying the number oi' teeth
movable blocking means adapted to 'be moved
of said toothed member engaging during turning
into the path of said shutter blade so as to hold
of the same said braking mechanism and varying
the same in operative position with said shutter
also simultaneously the time of speed limitation
aperture in register with said exposure aperture
' of said toothed member, thus .enabling variation
of said camera, and means operatively connect
of the length of time of speed reduction of said
ing said setting knob with said movable blocking
toothed member and of said shutter blade opera 50 means so that said setting knob moves said mov
tively connected with said toothed member dur
able blocking means into operative position in the
ing said various longer exposure periods of said
path of Asaid shutter blade when said setting knob
is in time exposure setting position.
shutter blade, movable blocking means adapted
to be moved into the path of said shutter blade so
8. In a shutter blade actuating mechanism, a
as to hold the same in operative position with 55 shutter blade, a manually turnable setting knob
said shutter aperture in register with said ex
for setting the various longer and shorter ex
posurevperiods and the so-called time exposure
posurevaperture of said camera, means opera
tively connecting said setting member with said
for said shutter blade, a turnable winding drum
movable blocking means so that said setting
mountedco-axially with said setting knob and
member moves said movableÑ blocking means into 60 operated at least during setting of said various
operative position in the path of said `shutter
shorter exposure periods `by the same, a coiled
blade when said setting memberI is in time ex
spring for moving said shutter blade past the`
posure setting position, means for releasing said
exposure aperture of a. camera, said coiled spring
shutter blade for operative exposing movement
being attached at its one end to' said shutter
past said exposure aperture of said camera, and 65 blade and at its other end to said winding drum
means operatively connected with said releasing
and wound -up partly upon the same when said
means for movingsaid blocking means when the
winding member is turned by said setting knob` in
same have been moved by said setting member
such a manner as to stretch said coiled spring
into operative position in the said path of said . and increase the tension of the same when said
shutter blade out of this path of said shutter 70 exposure period has to be shortened during said
blade after the latter has been held by said block
various shorter exposure periods, delayed action
ing means for the desired length of exposure'
means for reducing the .speed of said shutter
time in operative position with said shutter aper
blade while during said longer exposure periods'
ture in register with said exposure aperture.`
the shutter aperture on said shutter blade is in
7. In a shutter blade actuating mechanism, a 75 register with said exposure aperture of said
2,412,559
,
I15
.
camera, said delayed action means comprising a
turnable toothed member, a braking mechanism
adapted to engage the teeth of said toothed mem
, ber and to limit the speed of turning of the latter,
means operatively connecting said toothed mem
ber with said shutter blade while the same is
tei' blade while the same is moved by said shutter
blade moving means past said exposure aperture
of said camera and said shutter aperture in said
shutter blade is in register with said exposure
aperture of said camera, and means operatively
connected with said turnable setting knob for
moved -by said coiled spring past said exposure
turning during setting of said longer exposure '
aperture of said camera and said shutter aper
periods of said shutter blade said supporting
ture in said shutter blade is in register with said
member and said toothed member carried by the
exposure aperture, and means operatively con 10 same and thereby varying the number of teeth
nected w-ith said turnable setting knob for turn
of said toothed member engaging during turning
ing during setting of said longer exposure periods
of the same said braking mechanism and varying
of said shutter blade said toothed member and
also simultaneously the time of speed limitation
thereby varying the number of teeth of said
toothed member engaging during turning of the
of said toothed member, thus enabling variation
of the length of time of speed _reduction of said
toothed member and of said shutter blade opera
tively connected With said toothed member dur
ing said longer exposure periods of said shutter
blade, movable blocking means adaptedto be
same said braking mechanism and varying also
simultaneously the time of speed limitation of
said toothed member, thus enabling variation of
"the length of time of speed reduction of said
toothed member and of.said shutter blade opera 20 moved into the path of said shutter blade so as
. tively connected with said toothed member dur
to hold the same in operative position with said
ing said longer exposure periods of vsaid shutter
shutter aperture in register with said exposure
blade, movable blocking means adapted to be
aperture of said camera, and means operatively
moved into the path of said shutter blade so as
connecting said setting knob with said movable
to hold the same in operative position with said 25 blocking means so that said setting knob moves
shutter aperture in register with said exposure
said movable blocking means into operative posi
aperture of said camera, means operatively con
tion >in the path of said shutter blade when said
necting said setting knob with said movable
setting knob is in time exposure setting position.
blocking means so that said setting knob moves
10. In a shutter blade actuating mechanism,
said movable blocking means into operative posi 30 a shutter blade, a manually turnable setting
tion in the- path of said shutter blade when said
knob for setting the various longer and shorter
setting knob is in time exposure setting position,
exposure periods and the so-called time expo
means for releasing said shutter blade for opera
sure for said shutter blade, a turnable winding
tive exposing movement past said exposure aper
drum mountedco-axially with said setting knob
ture of said camera, and means operatively con-. 35 and operated at least during setting of said vari
nected with said releasing means for moving said
ous shorter 4exposure periods by the- same, a
blocking means when the same have been moved
coiled spring for moving said shutter blade past
by said setting knob into operative position in the
said path of said shutter blade out of this path
the exposure aperture of a camera, said coiled »
spring being attached at its one end to said shut
of said shutter blade after the latter has been 40 ter blade and atits other end to said winding
held by said blocking means for the desired length
drum and wound up partly upon the same when
of exposure time in operative position. with said
said winding member is turned by said setting
shutter aperture in register 'with said exposure
knob in such a manner as to stretch said coiled
aperture.
spring and increase the tension of the same when
9. In a shutter blade actuating mechanism, a 4. said exposure period has to be shortened dur
shutter blade, a manually turnable setting knob
ing said various shorter exposure periods, de
for setting the various longer and shorter ex
layed action means for reducing the speed of
posure periods and the so-called time exposure
said shutter blade while during said longer ex
for said shutter'blade, a turnable winding drum
posure periods the shutter aperture on said shut
mounted co-axially with said setting knob and ,
ter blade is in register with said exposure aper
operated at least during setting of said various
ture of said camera, said delayed action means
shorter exposure periodsby the same, a coiled
spring for moving said shutter blade past the ex
posure aperture of a camera, said coiled spring
being attached at its one end to said shutter blade
and at its other end to said winding drum and
wound up partly upon the same when said wind
ing member is turned by said setting knob in such
comprising a turnable toothed member, a sup
porting member supporting said toothed mem
ber freely turnably between two end positions,
spring means urging said toothed'member into
one of said end positions, a braking mechanism
adapted to engage the teeth of the toothed mem
ber and to limit the 'speed of turning of the lat
a manner as to stretch said coiled spring and
ter, means operatively connecting said toothed
increase the tension of the same when said ex 60 `memberl with rsaid shutter blade while the same
posure period has to be shortened during said
various shorter exposure periods, delayed action
means for reducing the speed of said shutter
blade while during said longer exposure periods
the shutter aperture on said shutter blade is in
register with said exposure aperture of said
camera, Said delayed action means comprising a
turnable toothed member, a supporting member
supporting ~said toothed member freely turnably
between two end positions, spring means urging
said toothed member into one of said end posi
tions, a braking mechanism adapted to engage
, the teeth of the toothed member and to limit the
is moved by said shutter blade moving means
past said exposure aperture of said camera and
said shutter aperture in said shutter blade is in
register with ysaid exposure aperture of said cam
era, and means operatively connected with said
turnable setting knob for turning during set
ting of said longer exposure periods of said shut
ter blade said supporting member and said
toothed member carried by the same and there
by varying the number of teeth of said toothed
member engaging during turning of the same
said braking mechanismand varying also si
multaneously the time of speed limitation of said
speed of turning of the latter, means operatively - toothed member, thus enabling variation of the
connecting said toothed member with said shut 75 length of time of speed reduction of said toothed
17
¿412,559
18
member and of said shutter blade operatively I atively connecting said setting member with said
connected with said toothed member during said
movable supporting member so that said setting
longer exposure periods of said shutter blade,y . member moves said supporting member together
movable blocking means adapted to be moved
with said blocking means into operative position
in the path of said shutter blade when said set
ting member is in time exposure setting position.
l2. In a shutter blade actuating mechanism
of the type described, a shutter blade, a manually
ing said setting knob with said movable blocking
operable setting member for setting the various
means so that said setting knob moves said mov 10 longer and shorter exposure periods and the so
able blocking means into operative position in
called time exposure for said shutter blade, a
the path of said shutter blade when said set
turnable winding member operated at least -dur
ting knob is in time exposure setting position,
ing setting of said various shorter exposure
means for releasing said shutter blade for oper
periods by said setting member, a coiled spring for
ative exposing movement past said exposure ap 15 moving said shutter blade past the exposure aper
erture of said camera, and means operatively
ture of a camera, said coiled spring being at
connected `with said releasing means for ¿nov
tached at its one end to said shutter blade and
ing said blocking means when the same have
at its other end to said winding member and
been moved by said setting knob into operative
wound up partly upon the same when said wind
position in the said path of said shutter blade 20 ing member is turned by said setting member
into the path of said lshutter blade so as to hold
the same in operative position with said shut
ter aperture in register with said exposure aper
ture of said camera, means operatively connect
out of this path of said shutter blade after the `
in such a manner as to stretch said coiled spring
latter-has been held by said blocking means for
the desired length of exposure time in operative
position with said shutter aperture in register
at least during said Various shorter exposure
periodsv by stretching the same when said ex
posure period has to be shortened, delayed action
with said exposure aperture.
,
25 means for reducing hthe speed of said shutter
blade while the shutter aperture in said shutter
1l. In a shutter blade actuating mechanism
blade is in register with said exposure aperture of
of the type described, a shutter blade, a man
ually operable setting member for setting the
said camera, said delayed action means compris
various longer and shorter exposure periods and
ing a turnable toothed member, a braking mech
the Iso-called time exposure for said shutter 30 anism adapted to engage the teeth of said toothed
member and to limit the speed of turning of the
blade, a turnable winding member operated at
latter, means operatively connecting said toothed '
least during setting of said various shorter ex
member with said shutter blade while the same
posure periods by said setting member, a coiled
is moved by said coiled spring past said exposure
spring for moving said shutter blade past the
exposure aperture of a camera, said coiled spring 35 aperture of said camera and said shutter aperture
being attached at its one end to said shutter
in said shutter blade is in register with said ex
posure aperture, and means operated by said
setting member for turning said toothed member
during setting of said various longer exposure
said winding member is turned by said setting
member in such a manner as to stretch said 40 periods and thereby varying the number of teeth
of said toothed member engaging during turning
coiled spring at least during said various shorter
blade and at its other end to said winding mem
ber and Wound up partly upon the same when
exposure periods by stretching the same when
said exposure period has to be shortened, de
layed action means for reducing the speed of
said shutter blade while the shutter aperture
in said shutter blade is in register with said ex
posure aperture of said- camera, said delayed ac
tion means comprising a turnable toothed mem
ber, a braking mechanism adapted to engage
of the same said braking mechanism and varying
also simultaneously the time of speed limitation
of said toothed member, thus' enabling variation
of the length of time of speed reduction of said
toothed'member and of said shutter blade opera
tively connected with said toothed member dur
ing said various longer exposure periods of said
shutter blade, blocking means adapted to be
the teeth> of said toothed member and to limit 50 moved into the path of said shutter blade so as
the speed of turning of the-latter', means oper
to hold the same in operative position with said
atively connecting said toothed member with
shutter aperture in register with said exposure
said shutter blade While the same is moved by
aperture of said camera, a supporting member
said coiled spring past said exposure aperture
carrying said blocking means and movably se
of said camera and said shutter aperture in said 55 cured to said camera, means operatively connect
shutter blade is in register with said exposure
ing said setting member with said movable sup
aperture, and means operated by said setting
porting member so that said setting member
member for turning said toothed member dur
moves said supporting member together with said
ing setting of said various longer exposure periods
blocking means into operative position in `the
and thereby varying the num-ber of teeth of 60 path of said shutter blade when said setting
said toothed member engaging during turning of
member is in time exposure setting position,
the same said braking mechanism and varying
means for,V releasing said shutter blade for op
also simultaneously the time of speed limitation
erative exposing movement past said exposure
of said toothed member, thus enabling variation
aperture of said camera, and means operatively
of the length of time of speed reduction of said 65 connected with said releasing means for mov
toothed member and of said shutter blade op
‘ ing said blocking means movably carried by said
_eratively connected with said toothed member
supporting means after the same have been
during said various longer exposure periods of
moved by said setting member into operative po
said shutter blade, blocking means adapted to
sition out of the path of said shutter blade after
be moved into the path of said shutter blade so 70 the latter has been held by said blocking means
as to hold the same in operative position with
forv the desired length of exposure time in opera
said shutter aperture in register with said ex
tive position with said shutter aperture in register _
posure aperture of said camera, a supporting
with said exposure aperture.
member carrying said'blocking means and mov
13. In a shutter blade actuating mechanism, a
ably secured to said camera, and means oper 75 shutter blade, a manually turnable setting knob
V
2,412,559
aperture of a camera, said coiled spring being at
tached at its one end to said shutter blade and at
its other end to said winding drum and wound up
partly upon the same when said winding member
`forsetting thevarious longer and shorter ex
posure times for said shutter blade, a- turnable.
winding drum secured co-axially to said setting
knob and operated by the same, a coiled spring
is turned by said setting knob in such a manner
as to stretch said coiled spring and increase the
aperture of a camera, said coiled spring being at
tension of the same when said exposure time has
tached at its one end to said shutter blade and at
to be shortened, delayed action means for reduc
its other end to said winding drum and wound
ing during said longer exposure times the speed
up partly upon the same when said winding mem
ber is turned by said setting knob in such a man 10 _of said shutter blade while the same is moved by
said coiled spring past said exposure aperture,
ner as to stretch said coiled spring and increase
means for varying the delaying action of said de-`_
the tension of the same when said exposure time
layed action means as necessary for obtaining the
has >to be shortened, delayed action means for re
required longer exposure time, lmeans for coop
ducing during said longer exposure times the
speed of said shutter blade while the same is 15 eratively connecting said means for `varying the
delaying action with said setting knob so as to
.moved by‘ said coiled spring past said exposure
enable operation of said varying means and said`
aperture, means for varying the delaying action
delayed action means iniluenced by the latter in
of said delayed action means >as necessary for
such a manner as to obtain during said longer
obtaining the required longer exposure time,
means for cooperatively connecting said means 20 exposure times the required speed reducing action
of said delayed action means, movable blocking
for varying the delaying action with said set
means adapted to be moved into the path of said
ting knob so as to enable operation of said vary
shutter blade so as to hold the same in operative '
ing means and said delayed action means in
position with said shutter aperture in register'
fluenced by the latter in such a manneras to ob
tain during said longer exposure times the re 25 with said exposure aperture> of said camera.,
means operatively' connecting said setting knob
quired speed reducing action of said delayed ac
with said movable ‘» blocking means so that said
tion means, movable blocking means adapted to
setting knob moves said movable blocking means
be moved into the path of said shutter blade so
into operative position in the path of said shutter
as to hold the same in operative position with
said shutter aperture in register with said ex 30 blade when said setting knob is in time exposure
setting position, means for releasing said shutter
posure aperture of said camera, and means op
for moving said shutter blade past the exposure _
blade for operative exposing movement past said
eratively connecting said setting knob with said
exposure aperture of said camera, and means op
movable blocking means so that Said setting knob
eratively connected with said releasing means for
moves said movable blocking means into opera
tive position in the path of said shutter blade 35 moving said- blocking means when the same have .
been moved by said setting knob into operative po
when said setting knob is in time exposure set
ting position.
sition in the said path of said shutter blade out oi
this path of said shutter blade after the latter
14. In a shutter blade actuating mechanism,
has been held by said blocking means for the de
> a shutter blade, a manually turnable setting knob
~ for setting the various longer and shorter ex
posure times for said shutter blade, a turnable
winding drum secured co-axially to said setting
knob and operated by the same, a coiled spring
for moving said shutter blade past the exposure
40
,
sired length of exposure time' in operative posi
>tion with said shutter aperturelin registerv with
said exposure aperture.
JACQUES BOLSEY.
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