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Патент USA US2406366

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Aug. 27, 1946.
J, N LGRAEF
,
.
2,4063%
CAMERA
Filed Jilly 31, 1942
2 Shéets-Sheet l
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John /V Graef
Aug. 27, 1946.1
J, N, GRAEF
‘
'
2,406,366
CAMERA
Filed July 31, 1942
95
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John: .N. Graef‘
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JM MZW .
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Patented Aug. 27, 1946
2,406,366
UNITED STATES PATENT OFFICEv
2,406,366
CAMERA
John N. Graef, Ann Arbor, Mich.
Application July 31, 1942, Serial No. 453,073
10 Claims.
1
My invention relates to roll ?lm cameras and
is particularly concerned with arrangements for
(on. 954.1)
'
2
of the camera body of Figure 1, illustrating fur
ther details of the mechanism;
'
preventing accidental double exposure of the ?lm
in such cameras, and related construction.
It is a primary object of the invention to pro
vide novel shutter and ?lm handling mechanism
Figure 3 is a fragmentary front elevation of
the shutter employed in the camera of Figure 1;
Figure 4 is an exploded view of the shutter and
?lm feed control mechanism of the camera of
and controls for a roll ?lm camera wherein a
fresh section of ?lm must be advanced to the ex
Figure 1, illustrating the parts thereof in detail;
Figure 5 is a fragmentary view illustrating the
posure aperture following each complete actua
manner in which the exposure counter is driven
tion of the shutter and before the shutter can
from the sprocket;
,
again be actuated to make another exposure, and
Figure 6 is a fragmentary side elevation, part
wherein advance of the ?lm is positively arrested
ly in section, illustrating the shutter and lens
when said fresh section of ?lm is located at the
adjustments on the lens mount tube; and
exposure aperture and cannot be resumed until
Figure 7 isa longitudinal section of a preferred
after actuation of the shutter.
15 embodiment of view ?nder employed in the cam
A further object of the invention is to pro
era of my invention.
vide a roll ?lm camera having a single control
Referring to Figures 1 and 2, my camera com
member connected by novel mechanism to ac
prises a body of diecastaluminum or other suit
tuate the shutter to expose the ?lm and at sub
able material formed with a central, forwardly
stantially the same time to release ?lm arrest 20 facing, substantially cup-shaped depression I I at
ing means to permit a fresh section of ?lm to be
the bottom of whichis an intermediate wall 12
advanced to the exposure aperture after each
formed with an exposure aperture 13. Wall I2
exposure.
at both ends extends forwardly and laterally out
A further object of the invention is to provide
wardly, as shown in Figure 1, to integrally join
novel roll ?lm camera mechanism whereby the 25 one end section 14 0f the camera front wall. One
shutter controls are locked in inoperative posi
wall section I4 extends arcuately rearwardly to
tion after each exposure and automatically un
form part of one end wall 15 of the camera and
locked when a fresh section of ?lm has been
to de?ne the lower half of a take up spool cham
advanced to the exposure aperture.
ber i 6. The rearwardly facing edge of wall I5
A further object of the invention is to provide
is formed with a groove l'l adapted to inter?t with
novel lock and release mechanism between the
the corresponding end wall part on the camera
shutter lever and a ?lm driven member in a roll
back cover (not shown). The other end wall and
?lm camera. Preferably this ?lm driven mem
supply spool chamber construction (not shown)
ber is a sprocket, which in turn drives the ex
is substantially the same, as the camera is sym
posure counter.
35 metrical.
A further object of the invention is to provide
The back cover for the camera is a unitary af
a novel adjustable shutter actuating linkage in
fair substantially the same as that shown in the
a roll ?lm camera.
co-pending application of Clinton H. Harris, Se
A further object of the invention is to provide
rial No. 413,518, ?led October 3, 1941, now Patent
No. 2,378,406, issued June 19, 1945, comprising
novel focusing and light control mechanism in a
camera.
the entire camera back wall, on the front face of
which is resiliently mounted a pressure plate
A further object of the invention is to provide
adapted to engage and hold ?at a ?lm passing
a novel take up spindle embodying a roller wedge
over suitable guides on wall 12, the entire bot
for gripping and holding the leading end of the
45 tom wall of the camera, and partial end walls
?lm.
.
shaped to inter?t with end Walls [5 of the cam
Further objects of the invention will presently
era body. Since this preferred type of camera
appear as the description proceeds in connection
back, which‘ is not shown in the drawings, forms
with the appended claims and the annexed draw
no part of the present invention, further descrip
ings in which:
50 tion thereof is unnecessary.
Figure 1 is a bottom elevation, partly in sec
The front wall of the camera comprises a cen
tion, of the major part of a camera body embody
tral section 18 which is seated on the body sub
ing the novel ?lm feed and shutter control mech
stantially ?ush with end sections 14 and held
anism and other details of the invention;
rigid with the camera body by screws or similar
Figure 2 is a rear elevation, partly in section, 55 fastening means. It is thereby removable for
aeoasee
3
4
adjustment, repair and replacement of the parts
a reduced end portion on which is non-rotatably
within depression H for which it forms a com
secured a sleeve 44 soldered or otherwise non
rotatably secured to a corner of a triangular lever
plete dust- and light-tight cover. Wall section
I8 is centrally formed with an integral cylindri
cal tubular shell |‘9 which extends into depression
plate 45.
|| almost to wall I2. Shell l9 serves to guard
against light entering the lens tube from expos
otally connected to a similar triangular bell crank
ing the ?lm being wound beyond the lens aper
ture.
Shell |9 projects a short distance forwardly of
the front surface of wall section It and has non
rotatably secured thereto a shutter mount tube
2| which extends a substantial distance forwardly
of the camera front wall. Tube 2| is formed at
its forward end with an inturned ?ange 22, upon
Lever 45, shaft 42 and lever 4| rotate
as a unit to trip the shutter.
As shown in Figures 2 and 4, lever 45 is piv
lever 46 by a link 41 which is preferably a round
wire having its ends bent at right angles in on
posite directions and inserted into suitable corner
apertures in levers 45 and 46.
Lever 46 is rotatably mounted on the inner
side of front wall section IS. A suitable post 43
is formed with a reduced plug 49 which is inserted
into a suitable hole in wall l8 and therein
which a shutter assembly support 24 is clamped
brazed or otherwise non-rotatably secured so
by means of a threaded collar 24’ on said support
and lock nut 25. Rear lens cell 23 is threadedly
mounted in collar 24’ as shown in Figure 6.
that post 48 forms a rigid support extending rear
wardly into depression I I from the front camera
wall It. In one corner, lever 46 (Figure 4) is pro
Shutter assembly support 24 is rigidly and non 20 vided with a circular aperture 5| adapted to ?t
rotatably with a circular boss 52 formed in
rotatably secured to tube 2| by lock nut 25 and
tegrally and concentric with the rear face of a
a locating pin (not shown) attached to ?ange 22.
plate 53 whose perimeter is shaped to be gripped
Support 24 houses suitable iris diaphragm and
by a suitable tool such as a wrench. A machine
shutter mechanism just forwardly of rear lens
cell 23, the tripping mechanism for the shutter 25 screw 54 extends through suitable aligned eccen
trio apertures in plate 53 and boss 52 into a
being located in enclosure 21 (Figure l). A dia
tapped hole in the rear end of post 48, and when
phragm adjustment ring 28, suitably connected
screw 54 is tightened with boss 52 seated within
to vary the diaphragm opening, is rotatably
aperture 5|, lever 43 is rotatably journalled on
mounted on support 24 and connected to actuate
the diaphragm in the usual manner. At its rear 30 boss 52. Care is taken not to bind lever 46 be
tween post 48 and plate 53. Since boss 52 is ec
edge, ring 26 extends over external shoulder 29
centric with the axis of aperture 5|, it will be
on the front end of tube 2| to thereby form a
seen that the effective leverage of lever 46 can
light tight joint, and is marked with suitable dia
be adjusted simply by rotating plate 53 to shift
phragm opening indicia cooperating with a suit
the center of rotation of lever 46. A coil spring
able index on the tube 2|. Since the structural
55, surrounding post 48, has one end secured
details of the shutter and the iris diaphragm are
within a suitable aperture 56 in lever 46 and the
not part of the present invention, further de
other end anchored, as at 51, on a suitable part
scription thereof is not needed.
rigid with wall I8. Spring 55 is a torsion spring
At its front end, support 24 mounts a front
functioning to urge rotation of lever 46 in the op—
support plate 26 which rotatably carries a shutter
posite direction of the arrow shown in Figure 2,
adjustment ring 3| which bears suitable indicia
and is thus the main spring of the shutter actuat
cooperating with an index on the periphery of
ing mechanism for returning said mechanism to
an indicator disc 32 rigid with support plate 26.
operative condition.
The front end of support 24 is also provided, pref
A third corner of lever 46 is pinned or other
erably on plate 26, with an internally threaded
wise pivotally received within the bifurcated lower
flange 33 on which is threadedly secured the cen
end 58 of a plunger 59 which extends at right
ter lens cell 34. The front ?ange 35 of lens cell
angles to the axis of the lens assembly. Above
34 is internally threaded for adjustably mounting
lever 46, plunger 59 extends slidably through a
a front lens cell 35. A calibrated ring 31, rigidly
secured to front lens cell 36, is preferably knurled 50 rearwardly projecting boss 69 which is rigid with
so that it can be gripped and turned for focusing,
and is provided with focus markings 38 cooperat
ing with a suitable index on the front face of
the camera front wall and also serves as a journal
for exposure counter shaft 6| (Figure 5). The
bifurcated connection between plunger 59 and
lever 46 prevents rotation of the plunger about
its axis.
A pawl 62 is rotatably mounted on plunger 59
and has non-rotatably secured thereto an up
wardly extending sleeve bushing 63 which sur
rounds plunger 59 and extends slidably into a
stationary indicator disc 32.
By the above construction, the rear and center
lenses are axially ?xed with the shutter and dia
phragm therebetween, and the front lens is axi
ally adjustable by rotation of ring 31 for properly
focusing the image on the ?lm at exposure aper
downwardly projecting guide boss 64 integral
ture l3.
with the camera body. Beyond bushing 63,
Enclosure H of the shutter assembly support
plunger 59 is formed with an enlarged section 65
houses shutter trip levers 39 and 4| of conven
abutting bushing 63 and slidably supported in the
tional construction. In my preferred. embodi
camera body. The plunger then extends from
ment of the invention, I employ conventional
connections (not shown) between ring 3| and the 65 the camera body through the space between the
body and the top cover, where it is further en
trip levers whereby the trip levers may be selec
tively positioned for instantaneous or time ex
posures. Lever 4| is non-rotatably mounted on
the front end of an elongated shutter operating
shaft 42 which is rotatably supported in a long
bearing sleeve 43 brazed or otherwise non-rotat
ably secured to ?ange 22 of the shutter mount
tube.
At its rear end, which is located substantially
within the camera body, shaft 42 is formed with
larged to provide an external manually acces
sible button 66 on the top of the camera.
A combined torsion and compression spring in
the form of a coil spring 61, extending between
boss 60 and the bottom face of pawl 62, sur
rounds plunger 59 and functions both to urge
plunger 59 upwardly towards the top of the cam_
era and also to rotate pawl 62 counterclockwise
as shown in Figure 1. This is accomplished by
2,406,366
5
anchoring one end of spring 61 on boss 60 and
6
Figure 7 to permanently locate and seal them in
the tube in gas and dust tight relation. This
sealing operation can be quickly carried out by
securing the other end to pawl 82 (Figure 4).
A locking pin 88 cooperates with boss 64 to pre
means of a heated instrument applied to the
vent relative axial movement between plunger
tube ends.
59 and pawl 62.
A sprocket 69 having the usual toothed wheels
Operation
‘10 for engaging the ?lm is rotatably supported
With the camera back removed, a ?lm roll or
by pin bearings ‘H and ‘I2 on spaced supports
cartridge is positioned in the supply spool cham
13 rigid with front wall section l8. As shown
in Figure 1, sprocket wheels 18 extend through 10 her (not shown) and the leader strip end pulled
out until it is inserted between roller 85 and ledge
suitable slots in wall [2 to be engaged by the
82. Spindle ‘I9 should be so initially positioned
?lm. Intermediate its ends, sprocket 69 is formed
that ledge 82 is parallel to the back of the camera,
with a worm thread ‘l4 meshed with worm wheel
15 on the rear end of exposure counter shaft Bl.
The front end of shaft 6| carries an indicator
dial 18 connected thereto by a frictional clutch
‘Hi’. This manner of driving the exposure counter
shaft from the sprocket is disclosed in the co
and the ?lm end looped back as shown in Figure
, l.
Knob 88 is rotated to wind the leader strip on
spindle ‘l9, roller 85 automatically shifting to
wedge and grip the ?lm against ledge 82 due to
the drag of the ?lm.
The edge perforations of the ?lm, which is
pending application of Clinton H. Harris, Serial
20 usually the conventional 35 mm. size, mesh with
No. 413,514, ?led October 3, 1941.
toothed wheels 10 of the sprocket and rotate the
Between worm thread 14 and the upper wheel
latter. Any equivalent ?lm driven roller or the
18, sprocket 89 is provided with a narrow annu
like may be substituted for sprocket 69 without
lar collar ‘H in Figure 1 with a peripheral sur
departing from the spirit of the inventon. Rota
face notch 18 adapted to abuttingly engage the
end of pawl ‘62 when the parts are positioned as 25 tion of knob 88 is continued until advance of the
?lm is arrested due to locking of sprocket 69. The
in Figure 1. Immediately below collar ‘H, sprock
camera back is now replaced to shield the ?lm
et 69 is integrally formed with a radially project
from light.
ing cam 80 which as will be explained later is
The sprocket is then released for further ro
adapted to engage and rotate pawl 62 against
tation by depressing button 66, and turning knob
the torsional action of spring 61 under certain
88 until the sprocket again locks. This opera
conditions.
tion is repeated once more, and results in locating
A take up spindle comprising a solid cylindri
the ?rst unexposed area of the sensitive ?lm be
cal bar '19 having a reduced end is rotatably sup
fore aperture l3. -Care must be taken during
ported at one end in a bearing block 8| rigid with
the camera body.
Within take up spool cham
, loading of the camera to insure that the shutter
ber I6, an intermediate section of the spindle
equivalent in length to slightly more than the
adjustment ring 3| is set for instantaneous ex
parallel to ledge 82 to permit easy insertion of the
end of the ?lm leader strip between the roller and
ledge 82. Roller 85 and ledge 82 form a roller
wedge clutch which, when the leader strip is in
serted therebetween, grips the same and holds it
tightly as the spindle is turned to wind the ?lm.
Above bearing 8|, spindle ‘is is further reduced
ring 3'! is manipulated for properly focusing the
to extend into a knurled knob 88 which is non
rotatably secured thereto as by a suitable screw.
locked sprocket 89.
posures to eliminate danger of prematurely ex
posing the ?rst sensitive area. Detailed descrip
width of a thirty-?ve millimeter ?lm, is removed
tion of the operation of the sprocket lock and
as a segment to provide a ?at ledge 32. Roller
retainer collars 83 and 84 are non-rotatably 4 ll release mechanism will be given below.
Exposure counter dial ‘:6 is now rotated to zero
mounted on the spindle at opposite ends of ledge
position on shaft Bl.
82, and are positioned to slightly overhang ledge
The camera is now ready for use with the shut
82 so as to retain the ends of a thin cylindrical
ter adjusted for instantaneous exposures. Dia
roller 85 which is freely rotatable and has suf
?cient capacity for movement away from and '~ phragm adjusting ring 28 is properly rotated, and
Knob 88 is spaced from the top surface of the
top camera cover 18 by a compression spring 8'!
and a washer 81'. Spring 81. urges the spindle
axially upwardly until the portion within cham
ber l8 abuts the camera body. This construction
insures a solid feeling take up action and com
pensates for wear or loose ?tting of the spindle
in its bearing. It permits speedy assembly, and
keeps the spindle parallel to the sprocket so as
to insure an ef?cient winding operation.
As shown in Figure 2, the lens ?nder tube 88
is secured as by rivets 89 to the bottom surface
of the top wall of the camera in alignment with
the center of the lens tube. Referring to Figure
'7, tube 88 is preferably made of a thermoplastic
composition having a dull ?nish which can be
initially molded to provide accurately spaced lens
seats 9| and 92 at opposite ends for the ?nder
lenses 93 and 94. When lenses 93 and 94 have
been seated, the ends of tube 88 may be speedily
beaded over as shown at 95 at the left end of
image on the ?lm. Plunger 6B is now in its up
permost position and pawl 62 is engaged with
notch 18, as shown in Figures 1 and 2. Under
these conditions the shutter mechanism is free
to be actuated to expose the ?lm and advance of
the ?lm toward the take up spindle is arrested by
-
-
The operator sights through ?nder 88 with
his ?nger on button 66, pushes it down to de
press plunger 59 fully, and then removes his ?n~
ger. When the plunger slides downwardly, it acts
through lever 46, link 41, lever 45, shaft 42 and
trip levers GI and 39 to actuate the shutter and
make the exposure. In my preferred embodi
ment, this instantaneous exposure is 1/100 second
but it may be any desired value without depart
ing from the spirit of the invention.
Adjustment of plate 53 to shift the pivot axis
1 of lever 46 serves to compensate for wear of the
parts as well as for manufacturing tolerances,
and aids adjustment during assembly,
Springs 55 and 81 both urge the shutter actu
ating mechanism toward the position shown in
Figure 1, but each functions separately. Spring
55 is the main spring preventing looseness and
play in the linkage between shaft 42 and plunger
59 and insuring the re-establishment of shutter
mechanism to operative condition after ?lm is
wound for another exposure regardless of the
2,406,366 ‘
7
length of time the plunger is depressed, and
8
meaning and range of equivalency of the claims
are therefore intended to be embraced therein.
What is claimed and desired to be secured by
United States Letters Patent is:
spring 5? urges the plunger upwardly upon re
lease.
As button {it is depressed, plunger 59 descends
and its enlarged section 65 carries sleeve 63 and
1. In a camera having an exposure aperture,
pawl 62 downwardly along therewith. This dis
means for feeding ?lm across said aperture, a
engages pawl 62 from notch 78. Moreover, as
movable control device actuated by movement of
soon as pawl 62 has descended su?iciently to clear
said ?lm, releasable stop means adapted to stop
collar ‘ll, spring 67 acts torsionally to immediate
movement of ‘said control device for arresting
ly rotate pawl 62 about the plunger and until the 10 feed of said ?lm after a predetermined linear ad
pawl bears on the intermediate portion of sprock
vance, shutter actuating mechanism, a shiftable
et 59 just below collar 11. Sleeve 63 is long
member resiliently biased in one direction con
enough to prevent undesired rocking of pawl 62.
As soon as the operator releases button 66, the
nected to operate said shutter actuating mech
plunger is urged upwardly by spring 61 but is pre 15 anism to make an exposure when moved in the
direction against said bias, means controlled by
vented from returning fully to the position of
said device for locking said shiftable member in
Figure l by reason of engagement of the upper
shifted position where it is inoperable to make a
side of pawl 62 against the lower face of sprocket
further exposure, means interconnecting said
collar ll. Pin 68 prevents plunger 59 from mov
ing axially upwardly with respect to pawl 62. Un 20 member and said stop means for releasing said
stop means upon said exposure making movement
der these conditions, actuation of the shutter
of said member, and means controlled by said
through manipulation of the plunger is prevented
?lm moved control device for releasing said locked
and the sprocket is unlatched to permit advance
member to permit it to be returned to its initial
of the ?lm. Although the locked plunger is per
mitted a slight downward displacement opposed 25 position so as to be immediately operable to make
a further exposure after said ?lm has been ad»
by spring 55, this is insufficient to trip the shut
vanced said predetermined amount.
ter, except where a time exposure is being made
2. In a camera having an exposure aperture,
means for feeding ?lm across said aperture, re
The operator now rotates knob 86 to wind the
?lm further on spindle 19 to advance a fresh un 30 leasable stop means arresting feed of said ?lm
after a predetermined advance, shutter actuating
exposed area to the exposure aperture. As the
mechanism. a shiftable shutter control member
moving ?lm rotates sprocket B9, rotating cam 80
resiliently biased in one ‘direction connected to
engages pawl 52 to rotate the pawl clockwise in
operate said shutter actuating mechanism to open
Figure 1 and outwardly until it can clear shoul
and
close the shutter upon movement of said
35
der Ti. As soon as pawl 62 has been cammed
as will appear.
outwardly su?icient to clear shoulder 11, spring
51 becomes effective thereupon to push the pawl
control member in the direction against said bias,
means interconnecting said control member and
said stop means for releasing said step means
back to the original position of Figures 1, 2 and 4
upon said exposure making movement of said
and the plunger follows along. This re-estab
lishes the shutter mechanism in operative condi 40 control member to enable feed of said ?lm across
said aperture, locking means for retaining said
tion so that the shutter may again be released by
shutter
control member in shifted position thus
depression of button 65. Cam 8'} is so located
rendering said control member inoperable to
with respect to notch ‘l8 that pawl ‘52 clears shoul
again operate said shutter actuating mechanism
der ll just prior to the time that notch 18 comes
to make an exposure until the ?lm has been fur
45
around so that pawl 62 immediately enters notch
ther advanced across said aperture to the extent
78 to stop rotation of the sprocket. The dimen
permitted by said stop means, and means opera
sions of cam 89 must be such that pawl 62 is not
able
after movement of the ?lm to that extent for
camrned too far outwardly to engage notch 18.
actuating said stop means to arrest feed of the
Thus as the shutter mechanism is restored to
?lm and at the same time unlocking said locking
operative condition through rotation of the
means to permit return movement of said shut
sprocket, at substantially the same time, the
ter control member so as to be immediately oper
sprocket is again locked against rotation to ar
able for making a further exposure.
rest ?lm advance and ?x the new unexposed
3. In a camera having means for feeding ?lm
portion of the ?lm before the aperture. By
across an exposure aperture, a sprocket adapted
55
manipulation of a single member I effect positive
to be engaged and rotated by said ?lm, stop means
?lm feed control and shutter operation in my
for arresting rotation of said sprocket, shutter
camera and prevent double exposure of the ?lm.
actuating mechanism, a plunger operably con
When making time exposures substantially the
nected to said shutter actuating mechanism and
same procedure is followed as for instantaneous
said stop means so that depression of said plunger
exposures. Initial depression of the plunger
from an initial position operates the shutter to
opens the shutter and the permissible axial play
expose the ?lm before the aperture and releases
in the locked plunger is su?icient to trip the shut
said stop means, resilient means opposing said
ter levers for closing the shutter. Once the ex~
depression of said plunger, means comprising in
posure is thus completed, however, the plunger 65 terengageable members between said plunger
cannot actuate the shutter mechanism until a
and said sprocket for automatically latching said
fresh area of ?lm has advanced.
This invention may be embodied in other spe
ci?c forms without departing from the spirit or
plunger in ‘depressed position after each said ex
posure to prevent further operation of the shutter
by said plunger, and means rotatable with said
essential characteristics thereof. The present 70 sprocket operative on said latching means and
embodiment is therefore to be considered in all
adapted to unlatch said plunger to permit return
respects as illustrative and not restrictive, the
of said plunger to its initial position by said re
scope of the invention being indicated by the ap~
silient means after the ?lm has been sufficiently
pended claims rather than by the foregoing de
advanced to move the exposed area beyond said
scription, and all changes which come within the 75 aperture.
2,406,366
9
10
4. In a camera, means for winding ?lm toward
take up means, a roller adapted to be engaged and
rotated by the moving ?lm, a collar on said roiler
mounted for relative movement axially of said
device in such relation that movement of said
formed with a peripheral recess.
cam on said
control member in said selected direction corre~
spondingly moves one of said stop elements to dis-:
engage
movement
it from
of thethe
?lm.
other stop element and
roller spaced from said collar, a slidable control
member provided with a manually accessible but
ton externally of the camera. a pawl rotatably
'7. In the camera de?ned in claim 6, means remounted on said control member adapted to be
sponsive to movement of the ?lm for reestablishengaged with said recess to stop rotation of said.
ing engagement of said stop elements after- the
roller and thereby arrest ?lm movement, and a 10 ?lm has been moved a predetermined amount.
coil spring surrounding said control member with
8. In a camera, shutter actuating mechanism, a
sliclable plunger operatively connected to said
its opposite ends secured to said paw1 and the
body of said camera respectively, said spring urg~
mechanism, a ?lm feed control member adapted
to be rotated by movement of the ?lm, and a latch
serving
ing saidtopawl
swing
in said
a selected
pawl into
axial
thedirection
path of said
rockably mounted on said plunger adapted to en—
cam when the control member is operated to re
gage a stop on said ?lm feed control member for
move said pawl from said recess and thereby per
preventing rotation of said ?lm feed control
mit further ?lm movement, and said spring also
member and arresting feed of said ?lm, Said latch
serving to shift said pawl back into position to
being displaced from engagement with said step
again be engaged with said recess when said pawl
upon exposure-making movement of said plunger.
is cammed away from said sprocket during said
9. In the camera de?ned in claim 8,. cam means
further ?lm movement.
rotatable with said ?lm feed control member
5. In a camera having an exposure aperture
adapted to engage and rock said latch when said
controlled by a shutter, ‘shutter actuating mech
?lm has been fed a predetermined amount.
anism comprising a slidablc plunger, a ?lm feed
10. In a camera, shutter actuating mechanism,
control member adapted to be rotated by the ?lm,
a spring biased control member operably con
an element slidable axially of said plunger, step
nected to said shutter actuating mechanism and
means on said ?lm feed control member adapted
shiftable against the force of said spring to open
to be engaged by said element, cam means on said
and close said shutter for making an exposure, a
?lm feed control member adjacent said stop
roller rotated by movement of the film, and means
means, and resilient means urging said plunger
interconnecting said control member and roller
in one axial direction and said element toward
comprising latch means for arresting rotation of
said ?lm iced control member, said element being
said roller, disengaged by movement of said con
displaced from engagement with said stop means
trol member in said exposure making direction,
upon exposure making movement of said plunger
means including said latch means operated l"
against the opposition of said resilient means and
said roller for locking said control member in i
being shifted by said cam and said resilient means
shifted position so that it becomes inoperative
into reengagement with said stop means after
make a further exposure after each. exposure
said film has been advanced suf?ciently to make
making movement, means for advancing said ?lm
a fresh exposure.
6. In a camera, a shutter actuating mechanism,
a control member movable in a selected direction
40 to make a fresh exposure, and mean-3 controlled
by said roller for immediately releasing
con“
trol member to permit spring urged return of said
for operating said shutter actuating mechanism
comes
controlimmediately
member to operable
initial position
to makewhere
exposure
it
to make an exposure, a rotatable ?lm feed control
device adapted to be engaged and moved by tho 45 when the ?lm has been advanced a predetermined
?lm, means interlocking said control member and
amount.
said device for arresting movement of the ?lm
JOHN N. G UAEF.
comprising a pair of engaged stop elements
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