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Патент USA US2133011

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Oct. 11, 1938.
w. A. BLACK
2,133,011
FOCAL PLANE CAMERA SHUTTER
Filed Oct. 25, 1956 '
4 Sheets-Sheet l
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INVENTOR
BY
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Oct. 11, 1938.
w. A. BLACK
2,133,011
FOCAL PLANE CAMERA SHUTTER
Filed Oct. 23, 1936
4 Sheets-Sheet 2
Oct. 11, 1938.
w. A. BLACK
2,133,011
FOCAL PLANE CAMERA SHUTTER
Filed Oct. 23, 1936
3%
4 Sheets-Sheet 3
INVENTOR
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Oct. 11; 1938.
w_ A_ BLA¢K
2,133,011
FOCAL PLANE CAMERA SHUTTER
Filed Oct. 23, 1936
4 Sheets-Sheet 4
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INVENTOR
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Patented Oct. 1.1-, 1938
2,133,011
UNITED .STATES
PATENT‘OFFICE
'- 2,133,011
FOCAL PLANE CAMERA SHUTTER .
William A. Black,v Montclair, N. J., assignor to
Fairchild Aerial Camera Corporation, Wood
side, Long Island, N. Y., a corporation of New
York
'A?plication' October 23, 1936, Serial No. 107,136
20 Claims. (01. 95-57)
This invention ‘relates to focal plane cameras,
-
shutter is being rewound and then closing it “upon
and has particular reference to focal plane cam ' completion of the shutter rewinding operation, so‘
era shutters especially adapted for aerial cameras that the solenoid is not subjected to a constant
in which the shutter'is provided with a'plurality
of ?xed dimension exposure apertures; Hereto
fore, focal plane camera shutters with a plurality'
CA
heating current.
.
i
The apertures of the shutter curtain are main
tained of fixed dimensions at all times by light
of non-adjustable exposure apertures have been wires stitched to the curtain fabric at opposite
provided with operating and controlling'means sides of the aperture and maintained at the
adjustable by the operator to determine the due proper spacing. by a diagonal lacing of light
10 ration of an exposure for anyv combination“ of
thread, the special knots of which do not project 10
aperture size and curtain speed and with means into theaperture so as to cause blurs or streaks
in the ?lm. Other improvements, in the new
to exclude the light during *the shutter rewind
in'g operation or ‘while changing the position of camera ‘shutter mechanism will be apparent from
the following description:
'
the curtain on the rollers, and the present inven
tion is directed to improvements on such appa
ratus.
-
In accordance with the present invention, a
focal plane camera shutter mechanism especially
adapted for aerial photography, althou h not
limited to that use, is provided in which /,proved
operating and controlling means are provided for
the shutter curtain, together with indicating
means for automatically indicating the exposure
time for‘ any combination of shutter curtain
25 speed and exposure aperture.
Also, the new
mechanism has associated with the shutter cur
tain a capping curtain mechanism for automati
cally capping the camera during tl/ie rewinding
operation or while manually changing the posi
tion of the shutter curtain on the rollers, to
It will be seen that the shutter mechanism of 15
this invention provides a simple and accurate ar-~
rangement for‘ controlling the shutter during all
normal conditions of operation, including those
conditions which may arise instantaneously and
requiring an adjustment without otherwise dis 20
turbing the remaining mechanism of the camera.
For a .more complete understandng of the in
vention, reference may be had to the accompany
ing drawings in which:
Figure 1 is a vertical section through the vshut
ter mechanism housing, as seen along the line
l-l of Fig. 2, showing driving mechanism for
the shutter and capping curtains;
'
Fig. 2 is a horizontal section through the cas
ing, as seen along the line 2-2 of Fig. 1, with 80
gether with interlocking safety devices adapted , the shutter curtain broken away to expose por
'
v
to prevent any movement of the shutter curtain tions of the mechanism;
Fig. 3 is a vertical section, as seen along the
prior to, the capping operation.
'
~
line 3—3 of Fig. 2, showing the relationship be
More particularly, the camera shutter mech
tween the shutter and capping curtains and the 35
35 anism of this invention comprises a shutter cur
30
tain provided with apertures of varying widths
and having a driving mechanism which is adjust
able to a predetermined speed for any selected
aperture and is interlocked with the capping cur
40 tain mechanism, so that the shutter curtain can- -
not be rewound until after the capping curtain
has been moved between the shutter and the
lens of the camera. Upon movement of the cap
ping curtain to uncap the camera, the trip mech
' anism for the shutter curtain is ready for oper
ation by the operator at any time, although
Fig. 2. '
'
along the line 5—5 of Fig. 1, through the shutter
curtain adjusting and driving mechanism;
Fig. 6 is a transverse cross-section thereof as
seen along the line 6—6 of Fig. 2;
45
Figs. ‘U8 and 9' are respectively a section, a
front view and a rear view of the shutter-con
The solenoid for controlling the- operation of
the shutter tripping mechanism is provided with
868,1‘;
trolling disc; '
Fig. 10 is a section of the shutter-controlling
)
Fig. 11 is an axial section as seen along the
means to prevent overheating thereof under con
line I l-l l of Fig. 2;through the shutter rewind
ditions where pictures are to be taken as'rapidly
ing control cam mechanism;
maticaliy breaking the solenoid circuit when the
40
Fig. 5 is. a transverse cross-section as seen
means are also provided for enabling the opera
tor to change from one size shutter aperture to
another without ?rst tripping the shutter.
as the camera can‘be rewound, this means auto
65
interlocking control mechanism between them;
Fig. ‘i is an exterior view of the casing showing
the manual aperture-selecting controls and in
dicating dials, as seen along the line 4-4 of
Fig. 12' is a transverse section therethrough as
seen along the line i2-I2 of Fig. 11;
2
2,183,011
Fig. 13 illustrates the electrical control for the
shutter rewinding mechanism, as seen alongr the
line I3—I3 of Fig. 1, and includes a schematic
electrical diagram;
' particularly in Fig. 2.
'
Fig. 14 is a face view of the shutter aperture
indicating disc for the shutter aperture selecting
mechanism;
and
_
.
'
Fig. 15 is an enlarged fragmentary view of the
shutter aperture lacing.
10
loosely mounted on the short shaft 9 journalled
in the casing ID at one end and in a partition I8
within the casing at its other end, as shown
Fixed to the outer face
of shutter-controlling gear II is a pin- I2 adapt
ed to ride back and forth in a slot I3 of curtain
controlling disc I4flocated immediately adjacent
the gear II and ?xed to the short‘shaft 9, Figs.
1, ‘and 7 to _10 inclusive ‘showing the construc
Referring to the drawings, the camera con
tion of the shuttef-controlling- gear II, and the '
forms in general to the well known Fairchild
type of aerial camera, constructed substantially
as illustrated and described in Patent No. 1,707,
curtain-controlling- disc I4. Disc/I4 is held with
its slot I3 111' a predetermined angular position
by, means of a movable segment I5 having a
lateral flange IB'engag‘ing aslot I6? in the flange, ,
849, Qto ISherman M. Fairchild, being provided
with the usual two or’ three main parts, such 21- of the disc I4, as indicated‘ in Figs. 1, 2 and 6.
When the shutter curtain I is in the unwound
as the casing I0 containing the shutter and cap
ping curtain and the actuating mechanisms position; pin _I2 is positioned at one extremity‘
therefor, together with the detachable film ' I3’ of the slot I3, as shown in Fig. 1,. ‘As gear
magazine and the lens cone, the magazine and
II is rotated in counterclockwise direction, by
lens cone not being illustrated in the drawings means to be described, pinion 3 and-the roller 2
in the interest of clarity, since the present in
are rotated clockwise and curtain I is unwound
vention relates 'only to the mechanism housed from roller 3 and'wound on roller 2. ~At1the
same time, ~pin I2 moves varound the ,_slot;_ I3 '
within the casing Ill.
The camera operating and ?lm-changing until at'the end .of the operation it has reached‘
mechanisms are actuated in the usual manner the opposite extremity I3" of' the slot I3, ‘as
by’ the electric motor M driving the "rotatable indicated in. Fig. 1..
shaft S, as 'shown especially in Fig. 1. The shaft. ‘ , Flange .I5’ of ‘segment I5 locks the shutter- I
S may be rotated manually by means of a crank controlling disc- I4 against (rotation by ‘engage
or the like, located outside of the casing and ment with slot I6 in ?ange 21.2 This segment I5'
30 not shown in the drawings. The shaft S drives isasecured to ‘a shaft I‘I journalled at one end in?
a series of gears generally designated G in Fig. 1, the. casing I 0 and at the opposite end in the
partition I8 and carrying the lever I9 outside the"
which, through a clutch mechanism to be de
scribed, drive successive gear trains, ‘generally casing It) for manu ly moving the‘se'gment. I5
to disengage its ?a ge I5,’ from s-lot I6 .to'un- "
designated D and E, for actuating the mecha
35 nismadapted to automatically-cap the camera
and set the shutter and also to drive the film
changing mechanism.
The shutter curtain [Iris rolled at its opposite
ends over the rollers 2 and 3 and is preferably
40 provided with two exposure apertures of pre
lock disc I4,F so‘that the latter can be “rotated
35.
for purposes of shifting the curtain‘ I on its
rollers in order to change exposure apertures.
The curtain is held in the above-mentioned po-__
.sition and’then released at will‘ by the operator
by means to be described?ater. Upon such re 40
determined ?xed widths, identi?ed according to lease the reverse action takes place, namely, the
width by letters A and B, one of which, A, is curtain unwinds from roller 2 on to roller 3' due
shown in Figs. 2 and 3. The apertures A and B, to the action of ‘spring 4, and gear II rotates
' are of a novel construction maintaining them of in the opposite, clockwise. direction until pin I2v
engages the end I3’ of the slot I3 in_disc I4
45 ?xed dimensions consistent with lightness andv
strength. -As illustrated particularly in Fig. 2, I
light wires I22 are sewn within the overlapped
and is stopped.
'
.
_
1
_
Disc I4 when, unlocked by handle I 9 may be
manually rotated for changing exposureaper
tures by means of 'a’ knob 23, located outside of
edges of the opposite sides of the aperture and
a light-weight thread I23 is laced diagonally
back and forth across the aperture and secured _ the casing Ill and secured to a short shaft 2I U
at each bight to the corresponding'wire I22.with journalled at opposite ends in the casing I0 and
' _I8 andnhaving a pinion 23 meshing
a special knot I24, which does not project into , partition
the aperture and consequently does not cause with the.teeth on disc I4. Engravedyon the
knob 23 are the letters A and B, indicating the
» blurs or streaks in the film during exposure.
aforementioned two exposure apertures of dif
55 The detail of the knot is shown in Fig. 15.1
Roller 3 is provided with an internal coil , ferent size in shutter curtain I.
spring 4 for rotating the roller to wind the
curtain I upon the roller 3 and unwindit from
~
7, the roller 2 in the usual way, the aperture A
60 or another similar aperture B traversing the
space between the lens and ?lm to effect the
exposure, the particular aperture A or B having
been selected by the operator, whereas the re
mainder of the curtain containing the other
65 aperture remains either rolled upon the wind
ing roller 2 or on the take-up roller 3. Roller 2
mounted on shaft 5, is also provided with an
internal coil spring 6, which islighter than the
spring 4 of roller 3 and is designed to prevent
70 overrunning of the curtain from roller 2 and to
. keepv it taut during an exposure.
The arrows
designate the direction of rotation necessary to
place either exposure aperture A or B in proper
position. When the curtain I is in the unwound
position shown in Fig. 1, both apertures A and B
are positioned on roller 3, the pin I2 of gear I I
being at the end I3’ of the slot I3 as aforesaid.
Inasmuch as there is but one slot I6 in the
?ange 21 of disc I4, the latter must be rotated a
full' revolution before ?ange I 5' of segment I5
can again engage in slot I6 to lock disc I4. A
full rotation of disc I4 in a counterclockwise .di
rection, as seen in Fig. 1, by knob 23 causes pin
I2 and gear II to be carried around by disc I4 to
rotate gear 8 and roller 2 in a clockwise direc- "'
tion, thus winding the shutter curtain I on roller ,
The mechanism for controlling winding and. 2 and placing pin I2 in the end I3” of slot I3
setting _'Of the curtain, by the motor M, includes
'a pinion 8 on one end of the shaft 5 of roller 2
and meshing with a shutter-controlling gear I I
of disc I4. Flange I5’ of segment I5 then lodges
in slot I6 to lock the shutter curtain in set posi
tion. The degree of necessary rotation of knob 75
3
2,133,011
23 and consequent winding of-the curtain I on
roller 2 depends on which of the apertures A
or B is selected .for the next exposure. These
apertures are so spaced that one complete revo
lutionof disc I4 as described places either one
or the other aperture in position for use. In
unwound position both apertures may be posi
tioned on roller 3 in which event A aperture is
being used to effect the exposure. In the event
the engagement of pin I2 of gear II on the end
of slot I3 of gear I4, as aforementioned, the pin
44 on gear 42 does not immediately vengage pin
45 on gear _|| upon initial rotation of gear 42
by <the rewinding mechanism described. The
movement of the shutter curtain | in the re
winding direction is accordingly delayed until
pin '44 moves around to engage pin 45. This
delay is provided and utilized for rendering the
B aperture is being used A aperture is positioned
camera light-tight by, means of ‘a capping cur
on roller 2 and B aperture on roller 3 in un
tain, the action taking place before rewinding
‘wound position. Friction washers 24 and ‘25‘on
shaft 2|‘ are urged against the corresponding
abutments by spring 26 to prevent unintended
reverse movement of the shutter curtain | by
the take-up spring 4 in roller 3 while the ?ange
I5’ of segment I5 is out of engagement with
disc I4.
'
Other means are provided to insure one com
plete revolution of the disc I4 in setting the
shutter curtain I at the proper selected posi
tion.
This means includes a disc 28 ?xed to the
shaft 8 outside of the casing I8. Immediately
behind disc‘28 and loosely mounted on the shaft
8 is a ?oating disc 28, shown particularly in
of the shutter curtain, begins.
10
-
The capping curtain 46 is mounted on rollers
41 and 48, containing the spring 48, and extends
parallel to the shutter curtain I and is adapted
to be moved automatically between the latter and
the lens in the direction of the arrow shown in
Fig. 3, during the shutter curtain rewinding oper
ation, or while changing the position, of the shut
ter curtain on its rollers. In its capping action
while moving in the direction ‘of the arrow in
Fig. 3, the spring 49 ‘of roller 48 is tensioned so
that upon release, the capping curtain is moved
by the spring 48 in the opposite direction to
uncap the camera.
-
'
Figs. 4, 5 and 14. A pin 30 on disc 28 moves
During the rewinding operation but inv the in-''
away from a projection 3| on disc 28 as the disc terval before the shutter curtain I begins to
28 is rotated until it strikes projection 32 on disc move, as described above, the'camera is capped
28 after disc 28 has made a revolution of 300°. by mechanism including a ‘disc 50 ?xed on shaft
The disc 28 is then rotated through 60° with disc _ 4| and provided with a projection 5| adapted to 30
28 until one end of recess 34 thereof engages pin be engaged by a dog 52 pivotally' mounted‘on
33 on the casing, I0, making a total revolution of gear sector 53, which meshes with a pinion 54 on
360° for disc 28 and consequently of controlling the capping curtain roller 48 and is journalled on
disc [4.x Engraved letters A and B properly
shaft 4|, as shownin Figs. 2,3 and 5. Although,
spaced o'nl‘disc'28 are visible through a peep hole during the initial movement of approximately 60°
35 in disc 28 toindicate which exposure aperture . of rotation of shaft 4| there is no movement of
is in use.
7‘
- I
the shutter curtain I, because pin 44 has not
Also provided on the disc 28 is a reference engaged pin 45', shaft 4| is nevertheless rotated
mark 36 and inasmuch as the disc 28 rotates
40 exactly 360° during one operation, mark 36 re
turns to the same position at all times. ‘The
mark 36 may, therefore, be employed to indicate
the duration of the exposure for a particular
combination of shutter aperture and curtain
speed, which exposure times are graduated on
knob 31. Two rows of such graduations are
provided on knob 31, one for A aperture and the
other for B aperture. The knob 31 is ?xed to a
. shaft 38 and is adapted for manual operation so
as to control a pallet retard mechanism regu
lating the speed of the shutter curtain I in the
manner disclosed in saidfPatent No. 1,707,849,
to Sherman M. Fairchild. This mechanism is
indicated at 40 in Fig. 5 as geared to shutter
controlling gear II, and as it forms no part of
the present invention, it need not be described
in detail.
The shutter curtain | rewinding mechanism
includes a shaft 4| aligned with shaft 8 and hav
60 ing splined therein a winding gear 42 operatively
connected through gears D to the aforementioned
clutch mechanism, generally designated 43 in
Fig. 1, gears G, shaft S, and motor 18 or the
manual crank. The construction of the afore
mentioned clutch 43 is not material to the pres
ent invention, an example of one form thereof
being illustrated in Sherman M. Fairchild ‘Patent
No. 1,817,182, and having a clutching and de
clutching cam limiting the rotation of gear 42 to
one complete revolution.
'
Fixed to the face of gear 42 is a pin 44 adapted
to engage a pin 45 ?xed to-the adjacent face
of shutter-controlling gear II, as shown in Figs.
2, 5 and 10. However, as the rotation of gear
II is limited to substantially’ 300° by reason of
and carries disc 5|! with it.
‘
-
A" pin 56 on disc 58 normally engages arm 51 40
of pawl 58 pivoted on casing‘IIl, so that as
disc 50 moves. pin 56 disengages arm 51, allow
ing pawl 58 to drop, so that its other arm 58
rides on sector 53. As disc 50 moves, sector
53 is advanced by reason of the engagement of 45
its dog 52 with projection 5| on disc 58, so
that the cappings'curtain roller 48 is rotated
to advance capping curtain 46 in the direction
of the arrow to cap the camera.
This move
ment. continues until the free end 60 of dog 52 50
engages a stationary pin 60"on the casing I0,
releasing dog 52 from projection 5|.
The wound spring 48 in roller 41 cannot re
turn the capping curtain to uncapping position
at this time, however, because arm 58 on pawl 55
58 lodges against one of the teeth on sector 53,
holding it against return movement by spring
48.
Continued rotation of the disc 50 as the
shutter curtain | rewinding operation continues,
causes pin 56 to engage arm 51 of pawl 58,
lifting the latter so that arm 58 is disengaged
from sector 53, releasing thespring 49 for re
turning the capping curtain to uncap the carn-v
era.
The camera is also capped during the/move 65
ment of lever I8. The shaft I ‘I carryin'g lever
I8 has, at its other end a gear sector 6|, which‘
is in mesh with another gear sector 62 loosely
mounted on the shaft 4|, .as shown in Fig. 2.
Fixed to the sector 62 is a collar 63 having a
recessed portion 64. ' Adjacent to collar 63 is a
sleeve 65 provided with a projection
sleeve being ?xed to the tubular shaft
nalled on shaft 4| and the projection
positioned within the recessed portion
66, said
55 jour
66 being
of collar
2,183,011
63.. By this arrangement, the lever I9 does not
to the casing I0 and at the other end to cam
move back' and forth during the capping opera
tion when actuated by the winding mechanism,
but movement of lever I9 rotates tubular shaft
condition by a latch 91 mounted on the core 98
94. The spring 96 is held in wound tensioned
of _ the solenoid 99 and engaging cam 94, as
or, 55, ‘thus rotating. gear sector 53 and capping
shown in Figs. 1 and 2. Energization of solenoid
99 by the usual manual key switch causes latch
the camera. It is not necessary for the opera
tor to hold ‘the lever down in order to keep the 91 to release cam,94~, so,that spring 96 is re
leased to' rotate cam 94 in a counter-clockwise
camera capped since this operation occursv dur
ing the unlocking of the controlling disc I4 by
ii ’moving segment I5“ which segment cannot re
turn to its normal “position until slot I8 in disc
I4 returns, as hereinbefore set forth.
I
, Means are provided for‘ locking the shutter
curtain I in wound position, whereby the "opera
tor‘ may change from one size exposure aperture
‘to the other without ?rst trippingv the curtain.
‘This locking‘means includes a link 61 pivoted
_ on- a short .shaft 68ipivotally carrying, another
link 69, the rotation of which in a clockwise
'23 direction is limited by the engagement of its end
‘ ‘I0 with pin 'II on. link 61,» while,v its opposite
end .72, is formed with a yoke'IIt engaging collar
'14 ?xed ‘to gear 42, as shown in Figs. 1 and 2.
Another link ‘I5 pivoted onalink B‘I‘has one arm
‘I6 urged against end ‘I0 of link 69 by‘ a tension
coil spring" vconnected to the other end of ‘II
of link ‘I5, and which does not move link'?'I.
Mounted on 'the shaft I ‘I of manual lever‘ I9
. 'is a cam 8|, which is so positioned and‘ shaped
3 L)
that when lever I9 is moved, cam 8| engages
link 69 against the tension of spring ‘I 8 to. move
gear 42 so that-its pin 44 is withdrawn from
the path of pin 45 on gear II. However, when
pins 44 and 45 are so disengaged the/“shutter
curtain’ I is free‘ to unwind under the in?uence
of its spring roller, which is not intended at
. this time, so a safety mechanism is provided on
shutter-controlled disc I4 as shown in Fig. 8, in
cluding'a link 82 pivoted on disc I4 at 83 and
having a pin 84. This pin 84 is adapted to lodge
in a slot in the end 80 of the bell crank lever
85 pivoted at 88 on disc I4 and having its free
end 81 normally lying in the path of the locking
segment I5. As this segment I5 is withdrawn
direction.
A roller I00 engaging the cam 94 is '
thus caused to move plunger 19 upwardly to 10
actuate the magazine mechanism, "which may
be of the construction disclosed in Patent No.
1,974,842, to W. A. Black, and thus forms no
part of the present invention. The gear 93 is
in operative relationship with a suitable retard 15
mechanism I.0I for retarding the vmovementaof
The solenoid latch 91 is adapted
to engage the hook-like projection I02 on the
I the cam 94.
cam 94 to hold it in position after rewinding and
also to engage the roller I00 to stop rotation of
the cam upon completion of its return move
ment.
.
In order to reset the cam. 94, a dog I03 pivoted:
on gear 89 is adapted to engage a projection
I04 of the collar I05 secured to the loosely-mount
ed sleeve 92,'as. shown in Fig. 12. Just prior
to the completion of one revolution of gear 89,
the latch 91 engages abutment I02 on the cam
94 to hold itin set position. Immediately there
after the end I06 of the dog I03 is depressed by
a inatively stationary roller’ I0'I to disengage dog
I03 from the projection I04 on collar I05, so that
the sleeve 92 and cam 94 are free to rotate in
the reverse direction. The roller is positioned at
the proper angle and is carried by a split clamp
ing ring I08 to permit adjustment, as shown in
Fig.
'
11.
"
-
"
v
,
In order to prevent reverse movement of the
drive shaft S, a crown cam I09 is provided on'one
of the gears G, this cam having an abrupt notch 40
III adapted to be engaged by a hook IIO on the
end of a lever II2 pivoted at II3 on casing I0
and urged against cam I09 by spring II4, as
shown in Fig. 13. As cam I09 rotates during the
winding operation, hook I,I0 rides ~,on the rim of
when 'manual lever I9 is moved as described,
this linkage assumes the position shown in Fig. the_cam, dropping into notch; III just prior to
8 under the action of spring 89, thus moving completion of the winding operation to lock shaft
pin 84 into the path of pin I2 on gear II to S against reverse movement.
‘'
'stop the rotation of gear II.
' At theend of its upward movement by cam 94,
The shutter curtain I may then be adjusted plunger 19 releases link 61, which it normally
to change from aperture A to B or vice versa,' holds against the tension of spring 18, as indi
without tripping the shutter, this manipulation cated in Fig. 2, so that ‘spring ‘I8 swings link'G'I
being done as described by means of the knob about its pivot 68 to move gear 42 outwardly and
28. This aperture change is effected at the end disengage'pin 44 from 45, releasing the shutter
rurtain for making the exposure. At the end of
(1
‘ Ll of one complete revolution of disc I4 when the
flange I5’ of segment I5 drops into notch I5 its upward movement a pin “5' on the plunger
and cam 8| releases lock 69, so that pins 84 ‘I9 engages a spring contact I I6, moving the latter
and I2 are disengaged and gear 42 is moved into contact with spring contact I", as shown in
back, ‘whereby pins ‘44 and 45 are engaged to ' Fig. 13, thus completing a circuit to the motor M
prevent rotation of gear II. Thus, the primary for rewinding the camera.
CO
‘
The plunger ‘I9 is provided with a spring, not
function of lever I9 and the mechanism described
is toenable a change in aperture at .any time shown, for restoring it downwardly to normal
to accommodate changing conditions without position behind link 61 as the latter is reset by
first requiring tripping of the shutter curtain the clutch 43. As the plunger ‘I9 thus moves down
to free it.
it releases its pin I I5 from pin contact IIB, tend
Driven by the clutch mechanism 43 through ing to break the rewinding circuit before rewind
intermediate gear M is a gear 89 ?xed to short inghas been completed. However, an arm H8
shaft 90 which terminates in a detachable con
on lever H2 is provided with a roller “9, which, ~
nection to the magazine driving mechanism, not
shown. As shown in Figs. 1 and 11, loosely
as the lever H2 is lifted by the cam I09 engages
mounted on shaft 90 is a sleeve 92 carrying a
gear 93 and a crown cam 94. This assembly
is driven in .a clockwise direction during rota
so that rewinding is continued until hook IIO
drops over the shoulder II I on cam I09 to open
contacts “6 and III.
In order to make the camera fully automatic, it
tion of shaft 90 during the rewinding operation
75 to. tension the spring 96 connected at one end
contact ,I I6 to keep it engaged with contact I", -70
is necessary that the solenoid 99 be energized-at 75
5
2,133,011
Upon completion of the shutter rewinding op
eration hook IIO drops into the notch III on
constant energization of the solenoid would result cam‘ I09 to lock drive shaft S and to allow con
in overheating, the circuit thereof is opened and tacts I I8 and III. to disengage to break the driv
all times so that pictures may be taken as rapidly
as the camera can be rewound. However, as this '
closed at regular intervals timed with the rewind
ing motor M circuit and contacts I20 and HI to
ing operation, whereby the solenoid circuit is ' reengage to place the solenoid circuit in condi-'
closed instantly upon completion of the rewind
ing operation. This action is obtained by a con
tion for operation. At this time shaft H has ro
tated to the point where the pin 58 on disc'50,
tact spring I2I engaging a contact I20 on spring » as shown in Fig. 3, lifts lever 51 to disengage
1 0 “5, both contacts being in the solenoid 99 cir
pawl 59 from the teeth of sector 53, allowing 10
cuit. Thus, when contacts H6 and III are in en
wound capping curtain spring 49 to return the
gagement to effect rewinding, contacts I20 and curtain to uncap the camera.
I2I are open so that the solenoid is not energized
and thus may cool between exposures.
15
‘
The operation of the camera of this invention
is described in detail in the foregoing but may be
brie?y summarized as follows:-Ret_raction of the
core 98 of solenoid 99, by closing the solenoid con;
tact K or by retracting the core .98 manually by
20 lever 98’, disengages the latch 91 from cam 94
to permit its spring 96, wound [by the previous
shutter rewinding operation, to rotate cam 94. As
cam 94 rotates, roller I00 rises thereon to lift
plunger ‘I9 upwardly, as seen in Fig. 1, to actuate
the ?lm magazine mechanism as described, and,
near the end of its upward movement, to release
link 81 so that its spring ‘I8causes it to advance’
gear 42 to disengage pins 44 and 45, releasing
the tensioned spring 4 of roller 3 to advance the
curtain so that aperture A or B moves across the
lens to make the exposure, the proper aperture A
After crown cam 94 has completed its func
tion of lifting plunger '19 as described, it is reset
by' the shutter curtain rewinding mechanism 15
through gear 89 and the mechanism shown ‘in
Figs. 11 and 12, in which dog I03 on the gear 89
rotates disc I05 connected to cam 94 so as to
rotate the latter and wind up its spring 98 to a
point where roller I01 disengages dog I03 from 20
disc I05. The released solenoid latch 91 then
lodges behind the projection I02 on cam 94 hold
ing it in wound position for the next release by
solenoid 99 for repeating the cycle in the man
25
ner described.
For'changing the setting of the shutter cur
tain I, which may be accomplished when it is
wound without tripping it, hand lever I9 is moved
to release segment I5 from disc I4, unlocking the
latter for adjustment by knob 23. Movement of 30
handle I9 also shifts gear 42 to disconnectpins
44 and 45, so that shutter curtain I may be ad
or B having been preselected by adjustment of
the selecting means shown in Fig. 4. The pin I2 justed independently of the rewinding mechanism
accordingly snaps closed from end I3" to end I3’ ‘ controlled by clutch 43. Though the curtain is
35 of slot I3 in disc I4, which determines the limit
freed it does not unwind because manipulation 35
of movement of curtain.
,
-
At the end of the upward movement of plunger
19, its pin II5 closes contacts H8 and III to en
ergize motor M, which, through shafts S and
gears G drives clutch 43, which restores link 81
and consequently gear 42 to normal position with
its pin 44 in the path of .pin, 45 on gear II, this
normal position of link 81 permitting plunger 19
on its subsequent return by its spring when re
leased by cam 94 to insert_itself under the free
end 80 of link G'I'as shown by Fig. 2, the motor
M contacts H8 and ‘Ill meanwhile being kept
closed by roller. I I9 as hook I I0 rides on the rim
of cam I09, whereas solenoid contacts I20 and
I2I.are open.
-
~
,_
'
.
Although gear 42 is being rotated by gearing D,
its pin 44 has not moved around to engage pin
45 to start rewinding the curtain I, allowing time
of handle l9 to release disc l4 also causes seg
ment I5 to release the end 81 of lever 85, whose
spring 89 moves lever 85 so that pin 84 engages
pin I2 to prevent spring 4 of roller 3 from being
released.
'
'
\
40
The aperture selection is made by rotating
knob 23 to bodily shift curtain I on its rollers,
friction spring 28 preventing reverse. movement
by spring 4 during the adjustment. A full rota
tion of disc I4 is necessary in order to effect 45
reengagement of the ?ange I5’ of segment I5
with the ‘slot I8 of disc I4 to lock the latter.
Upon relocking of disc I4 in this way, gear 42 is
restored to coupling position with gear I I so that
respective pins 44 and 45 reengage. Also, the 50
disc 29 is engaged. and wound by the pin 30 on.
disc 28 connected to disc l4 so that it indicates
through peep-hole 35 the change in selection of
for capping curtain 48 to be moved across the
lens. The aforementioned rotation of gear 42 ro
tates shaft H to carry sector 53 with it, winding
up the capping curtain on. roller 41, as seen in'
During this manual adjustment of the shutter 55
Fig. 3, thus tensioning the spring 49 in companion
roller 48, the curtain moving in the direction of
the arrow until dog 60 is released by pin 80’ to
release the sector 53, which,,however, is ‘locked
against return by engagement of pawl 59 with
lock between the shutter curtain winding and
setting mechanism and the capping curtain 60
mechanism, the shutter curtain cannot be moved
the teeth thereof.
1
.
The camera is thus capped light-tightly as
pin 44 on gear 42 engages pin 45 on gear‘ II to
exposure aperture from A to B or vice versa.
curtain, capping curtain 48 is moved across the
lens in the manner described.
It will be observed that because of the inter
by tripping‘ or manual adjustment until after the '
capping curtain has ‘completed its cycle of opera
tion.
While a preferred embodiment of the invention’
rotate the latter and with it the pinion 8 and _ has been illustrated and described herein, it is‘
roller 4 to rewind the shutting curtain. As disc to be understood that the invention is not limited
I4 is locked by segment I5, it does'not rotate, but thereby, but is susceptible of changes in form and
pin I2 on gear II moves around to the end I3"
detail within the scope of the appended claims.
7 0 of‘ slot I3 in disc I4, where rotation is stopped by
70
I claim:
limit clutch 43.. The spring 4 in roller 3 is now
1. In a focal plane camera, the combination of
'tensioned' and ready'for tripping to‘ draw the an apertured shutter curtain, a capping curtain
curtain I from roller 2 upon which it has been for traversing the shutter curtain to render the
wound, the, selected exposure aperture thus tra
camera light-tight, means for rewinding the shut
'
~1 versing the lens.
ter curtain, operative connections between said 75
6
2,133,011
means and said shutter and capping curtains,
timing means in said connections for initiating
movement of said capping curtain to render the
camera light-tight before movement of said shut
Cl ter curtain, and means responsive to completion
of rewinding of said shutter curtain for releasing
said capping curtain to restore it to uncapped po
sition.
2. In a focal plane camera, the combination of
10 an apertured shutter curtain, a capping curtain
for traversing the shutter curtain ‘to render the
camera light-tight, means for rewinding the shut
ter curtain, operative connections between said
means and said shutter and capping curtains,
trip mechanism for releasing said shutter cur
tain, and interlocking connections between the
capping curtain and the trip mechanism, where
by the latter'cannot be actuated while the cap
ping curtain is operative to render the camera
20
light-tight.
3. In a focal plane camera, the combination of
an apertured shutter curtain, a capping curtain
for traversing the shutter curtain to render the
camera light-tight, means for rewinding the
shutter curtain, operative connections between
said means and said- shutter and capping cur
' tains, means in the connections between the re
winding means and the capping curtain for look
ing the ' latter in operative position rendering
30 the camera light-tight, and timing means con
the former is rendered inoperative until restora
tion of said capping curtain‘to inoperative posi
tion by said timing means.
'7. In a'focal plane camera, the combination of
a shutter curtain having a plurality of fixed aper-‘
tures, avspring for actuating theecurtain, means
for winding said spring, trip mechanism for re
leasing said spring, means for adjusting said our
tain, and mechanism actuated by said adjusting
means’ for locking said trip mechanism during
adjustment of said curtain, whereby the shutter
curtain apertures may be selected without re
leasing said trip mechanism.
-
8. In a focal plane camera, the combination of
a shutter curtain having a plurality of ?xed ap
15
ertures, a spring for actuating the curtain, means i
for winding said spring, trip mechanism for re
leasing said spring, adjustable coupling means
between the rewinding. means and said curtain,
means independent of the trip mechanism for 20
adjusting said coupling. means, and locking
means for said spring for preventing unwind
ing thereof during adjustment of said coupling.
9. In a focal plane camera, the combination of
a shutter curtain having a plurality of ?xed ap 25
ertures, a spring for actuating the curtain, means
for winding said spring, trip mechanism for re
leasing said spring, means interposed between
said curtain and said trip mechanism for ad
trolled by the rewinding means for releasing said
justing said curtain independently of said trip 30'
mechanism, and automatic means for holding
capping curtain locking-means independently. of
.said spring against unwinding during adjust
ment of said curtain by said adjusting means.
said shutter curtain to uncap the‘ camera.
10. In a focal plane camera, the combination
4. In a focal plane camera, the combination of '
35 an apertured shutter curtain, a capping curtain
of a shutter curtain having a plurality of ?xed 35
for traversing the shutter curtain to render the
apertures, "a spring for actuating thecurtain,
camera light-tight, means for rewinding the shut
means for winding said spring, trip mechanism
ter curtain, operative connections between said _for releasing said spring, driving means between
the rewinding means and said curtain including
a pin-and-slot combination,v and aperture-select
ing means for bodily adjusting said pin-and-slot
and the shutter curtain for delaying the rewind
ing of the latter, and restoring means for the combination and shifting said'curtain, whereby
capping curtain released independently of they the relationship between said rewin'ding'means
and said shutter curtain is altered in accordance
‘shutter curtain by the rewinding means substan
with the selected curtain aperture.
tially upon completion of the shutter curtain re
11. In a focal plane camera, the combination
winding operation for uncapping the camera.
5. In a focal plane camera, the combination of of a multi-apertured shutter curtain, a roller‘
an apertured shutter curtain, a capping curtain therefor, a spring for actuating said roller, driv
for traversing the shutter curtain to render the. ing means connected to the roller for winding
the curtain thereon and winding said spring, an
50 camera light-tight, means for rewinding the shut
ter curtain, operative connections bet een said adjustable coupling in said connection, selecting
means and saidshutter and capping curtains, means for adjusting said coupling to vary the
springs for said curtains adapted to be wound degree of winding of said curtain on the roller,
and means for limiting the adjustment of said
by said rewinding means, timing means con
trolled by said rewinding means for releasing the selecting means in accordance with the number
spring of said capping curtain to restore it to of apertures in said curtain.
..
'
.
means and said shutter and capping curtains,
lost motion means between the rewinding means
uncapped position upon completion of‘ the re- ,
12. In a focal plane camera, the combination
winding operation, and independent trip mechar of a multi-apertured shutter curtain,‘ a roller:
nism for releasing‘the spring of said shutter
60
an apertured shutter curtain, a capping curtain
for traversing the‘ shutter curtain to render the
therefor, driving means connected to the roller
for winding the curtain thereon, a coupling in 60
said connection, selecting means for adjusting
the relationship between said coupling and said
driving means to vary the degree of winding-of
camera light-tight, means for rewinding the
said curtain on the roller, and a clutch in said
shutter curtain, operative connections between
connection for disconnecting said coupling means
from said driving means to permit adjustment of
the former by said selecting means.
13. In a focal planecamera, the combination
of a multi-apertured shutter curtain,‘ a spring for
actuating the curtain, an electricmotor for re 70
curtain.
'
6. In a focal plane camera, the combination of
65
said means and said shutter and capping cur
tains, springs for said curtains adapted to be
wound by said rewinding means, timing means
controlled by said rewinding means for releasing
70 the spring of said capping curtain to restore it
to uncapped position upon co letion of the re-'
75
winding operation, independen trip mechanism
for releasing the spring of said shutter curtain,
and interlocking connections between said trip
mechanism and said capping curtain, whereby
winding said spring after an exposure, a switch
in the motor circuit, means for closing said switch
to initiate the winding operation, and timing
means driven by the motor for maintaining said
switch closed for a predetermined time.
‘
75
2,188,011
7
7
14. In a focal plane camera, the combination
of a multi-apertured shutter curtain, a spring for
actuating the curtain, an electric motor for re
of stiifening members secured to the opposite
sides of said aperture, and thin lacings extend
ing diagonally between said members across said
winding said spring after, an exposure, a switch
in vthe motor circuit, means for closing said
switch to initiate the winding operation, a sole
18. In a camera, the combination of a focal
plane shutter having a plurality of diiferent ex
noid included in said last-named means, and
meansdriven by the motor for opening the cir‘
cuit of the solenoid after the beginning of the
10 curtain rewinding operation, and reclosing the
' same at the end of the curtain rewinding opera
tion.
15. In a focal plane camera, the combination
of a multi-apertured shutter curtain, a spring
15 for actuating the curtain, an electric motor for
rewinding said spring after an exposure, a switch
in the motor circuit, means for closing said switch
to initiate the winding operation, a'spring motor
controlling said last-named means, connections
20 between the electric motor and said spring motor
for rewinding the latter, and means for releasing
said spring motor at will.
16. In a focal plane camera, the combination
of a multi-apertured shutter curtain, a spring
25 for actuating the curtain, an electric motor for
rewinding said spring after an exposure, a start
ing switch in the motor circuit, a spring motor,
connections between the spring motor and the
electric motor for rewinding the former during
30 the" spring rewinding operation, means for re
leasing said spring motor, means actuated by
said spring motor for closing said starting switch
to initiate the spring rewinding operation, and
means actuated by said electric motor for main
taining said starting switch closed for a'prede
termined time.
-
17. In’ a focal plane camera shutter curtain
having an exposure aperture, the combination
aperture for ?xedly spacing said members apart.
posure apertures, storage and take-up rollers
therefor, uniform motion means for said shutter,
means for adjusting the speed of said means,
means for positioning said shutter on said rollers 10
‘to select the aperture to be used, and indicating
means interconnected with said speed adjusting
means and said uniformvmotion means for di
rectly indicating the time duration of an ex
posure.
15
.
19. In a camera, the combination of a focal
plane shutter having a plurality of different ex
posure apertures, storage and take-up rollers
therefor, speed control means for said shutter,
an indicator therefor, shutter aperture selecting 20
means, and an indicator therefor located adja
cent said speed control indicator, said indicators
being complementary so as to give a direct in
dication of the exposure time for a particular
combination of shutter aperture and shutter 25
speed.
’
20. In a focal plane camera, the combination
of a multi-apertured shutter curtain, a spring for
actuating the curtain, means for winding said
spring, trip mechanism for releasing said spring, 30
a means for adjusting said curtain, and means ac
tuated by said adjusting means for locking said
trip mechanism during adjustment of said cur
tain, whereby the shutter curtain apertures may
be selected without releasing said trip mecha
nism, and means limiting said adjusting means
to a predetermined movement.
a
'
WILLIAM A. BLACK.
as
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