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Патент USA US2407277

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‘Sept. 10, 1946.
Original Filed Oct. 19, 1943
10 Sheets-Sheet 1
' a
Sept. 10, 1946.
E_ s, HlNELlNE
Original Filed Oct. 19, 1943 '
l0 Sheets-Sheet 2
‘ Sept? 10, 1946,
Em m N01
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Sept’ 10, 1946.
E‘ s_ HlNELlNE _
Original Filed Oct. 19, 1943
10 Sheets-Sheet 4
Sept. 10, 1946.
Original Filed Oct. 19, 1945
10 Sheets-Sheet 5
Sept.‘ 10, 1946. -
Sept. 10, 1946.
‘ Original Filed Oct. 19, 1943
1O Sheets-Sheet '7
_ Zébon??'neline
Ma"; _ Aéiprngys'
vOriginal Filec? Oct. 19, 1943
1Q Sheets-Sheet 9
Edson?'. Hake-Zzhe
Sept. 10, 1946.
Original Filed Oct. 19, 1943
Patented Sept. 10, 1946
' 2,407,277
Edson S. Hineline, Rochester, N. Y., assignor to
Gra?ex, Inc., Rochester, N. Y., a corporation of
(Priginal application October 19, 1943, Serial No.
506,848. Divided and this application March
24, 1944., Serial No. 527,918
21 Claims. (Cl. 95'—57)
This application is a division of my co-pen'ding
application Ser. No. 506,843, ?led October 19, 1943,
trol, the entire mechanism being shown in its
condition when the shutter has been rewound and
for Electric-motor-driven combined camera, fo
cal-plane shutter and ?lm-feed, this divisional
application being particularly directed to the m0
tor-driven curtain-shutter and release mechanism
disclosed in said parent application.
This invention relates to photographic cameras,
particularly of the automatic aerial type, but
the exposure opening and the camera is ready for
making an exposure;
Fig. 11 is a front elevation similar to Fig. 10 but
with a different position of the parts, the circuit
the shutter rewind stud;
a new area of ?lm has been fed into position over
having been closed to the shutter release solenoid,
the shutter curtain having run all the way down,
adapted for various uses.
10 thus completing a circuit to the motor, and the
In order that the principle of the invention may
motor having started to operate, thus lifting the
be readily understood, I have disclosed a single
pressure pad and releasing the ?lm measuring
embodiment thereof in the accompanying draw
mechanism, the ?lm being wound to the next ex
ings, Wherein—
posure position and the shutter being rewound
Fig. l is a front elevation of the camera having 15 for the next exposure;
the “cone” partly broken away to show clearly the
Fig. 12 is a partial horizontal section on an en
mounting of the lens barrel;
larged scale through Fig. 10 on the line I 2-42
Fig. 2 is an enlarged fragmentary view corre
thereof, showing the motor gear drive and its as
spending to a part of Fig. l, and also showing the
sociation with the cycling mechanism or inter
shutter setting knob provided when the camera 20 rupted gears, the idler gear constituting the
is equipped with a shutter having a number of
counter gear and the counter dial;
different exposure aperture settings;
Fig. 13 is a detail in horizontal section through
Fig. 3 is a wiring diagram of the camera, show
the ?lm measuring clutch;
a battery as a current supply source and a
Fig. 14 is a detail in side elevation of the inter
switch for closing the circuit to operate the 25 rupted gears;
Fig. 15 is a horizontal section through Fig, 10 on
Fig. IL is a top plan view of the camera with part
the line l5—l5 thereof, showing the shutter re
of the housing in horizontal section so as to show
wind mechanism;
the position of the pressure pad, the idler roll, the
Fig. 16 is a fragmentary left-hand end view of
?lm measuring roll, the ?lm spool support and 30 the camera viewing Fig. 10, with parts broken
the drive mechanism;
away more clearly to show the construction;
Fig. 5 is a partial vertical section through the
Fig. 17 is a horizontal section through the shut
camera,- taken at the right of the curtain rewind
ter rewind mechanism, showing the shutter re
rolls as viewed in Fig. 4 and showing the curtain
wind driving pawl, the shutter being completely
rewind mechanism and the shutter release 35 rewound and the driving pawl disengaged from
Fig. 6 is a detail showing in side elevation the
second curtain rewind gear and the second cur
Fig. 18 is a side elevation of the parts shown
in Fig. 17, certain parts being represented in
tain pinion;
broken lines to show more clearly the construction
Fig. 7 is a vertical section through Fig. 6 on the 40 of the shutter rewind driving mechanism, rep
line 'i—-'? thereof, showing the curtain latch stud
resented as in condition for rewinding the shut
and the second curtain driving stud; ,
ter, the driving pawl not yet having been re
Fig. 8 is a detail in side elevation, showing the
?rst curtain rewind gear and the ?rst curtain
Fig. 19 is a view similar to Fig. 18, but repre
pinion. ;
Fig. 9 is a vertical section through Fig. 8 on the
line 9~—€1 thereof, showing the shutter rewind
45 senting the driving pawl as released from the
driving stud of the ?rst curtain gear;
Fig. 20 is a detail of the shutter rewind mech
anism, the shutter being rewound but the rewind
stud and, the second curtain driving stud;
Fig. 1G is a front elevation of the camera with
pawl not yet released;
the lens “cone” and the mechanism housing cover 50 Fig. 21 is a view similar to Fig. 20, the rewind
pawl having been released and the second curtain
removed to show the cycling mechanism, the ?lm
release stud engaged by the shutter release
feed clutch, the exposure counter, the shutter
rewind mechanism, the switches for controlling
the cycling mechanism and shutter release, and
the receptacles for power supply and remote con
Fig. 221s a view similar to Fig. 21, the shutter
, having been released and run all the Way down;
Fig. 23 is a detail of the shutter winding mech
anism with certain of the parts removed to show
the construction of the rewind pawl, the rewind
camera shutter itself, so that after each opera
tion of the shutter the camera is automatically
restored to condition for a second exposure; to
provide a camera having a self-capping focal
plane shutter of a variable exposure aperture
stud being shown in section, and the rewind pawl
being about to be engaged by the pawl release
Fig. 24 is a view similar to Fig. 23, the rewind
pawl having been acted upon by the release cam;
Fig. 25 is a section through the curtain rollers,
the curtains and the exposure plate lengthwise
the latter, the curtains being shown in the run
type and having means for controlling the width
of the opening of such exposure aperture during
the time the curtains travel in a picture-making
direction; and to provide a camera having a
simple curtain rewind mechanism that can be
easily serviced in the ?eld.
This invention is more particularly directed to
the shutter mechanism, and to the automatic
cycling means driven by an electric motor and
having been rewound and the exposure slot or
controlled by the operation of the shutter itself,
aperture thereof not yet established;
so that after each operation of the shutter the
Fig. 27 is a view similar to Fig. 25, showing the
camera is automatically reset. Before proceedcurtain exposure slot or aperture established and
ing to describe these and other important fea
the curtains in condition for making an exposure;
tures, I will describe in detail the general struc
Fig. 23 is a broken-away detail in top plan view
ture of the camera body and for that purpose will
of the curtains when in the condition shown in
refer ?rst to Figs. 1, 2, and 4, wherein is shown
Fig. 25;
the preferred form of structure for this purpose.
Fig. 29 is a similar top plan view of the cur
The camera body, as shown in Figs. 1, 2, 4
tains in the condition shown in Fig. 27;
and 5, is made up mainly of two parallel spaced
Fig. 30 is a longitudinal section through the
plates, one of which is termed the mechanism
curtains showing the exposure slot or aperture, ~
plate and is indicated in section in Fig. 4 and else
the curtains having just started to run down or
where at 20. Parallel therewith and spaced there
across the exposure opening; and
from by nearly the Width of the camera is the
Fig. 31 is a section similar to Fig. 30, the cur~
other or so-called outer plate 2|, and supporttains having run down and the exposure slot or
aperture being represented as having a greater 230 ed between said plates 20 and 2|, normal there
to, is a central channel member 22, shown in
dimension than the exposure slot or aperture
plan in Fig. 4. The said member 22 is attached
shown in Fig. 30;
to mechanism plate 20 by rivets 23, and to the
This invention relates to a new photographic
down and capped condition;
Fig. 26 is a view similar to Fig. 25, the curtains
camera that is adapted to many uses, among
_ outer plate 2| by screws 24.
Positioned between said plates Ml, iii are par
titions 25 and 26, both being indicated in dot~
ted lines in Fig. 4. Both partitions 25, 26 are
of channel form, and are attached to the mech—
anism plate 20 by rivets passing through up
turned edges and to the outer plate 2| by screws
28 passing through said upturned edges. Also
stores itself for a second exposure. The camera
positioned between the mechanism plate 20 and
is also especially adapted for use
an aerial
the outer plate 2| is a “cone” support casting
camera particularly when used for certain classes
of any suitable shape (indicated in dotted lines
of work such as photographing the smoke given
off by a bomb when it explodes upon hitting the " at 29 in Figs. 10 and 11 and in solid lines in Fig.
5), which is attached to the mechanism plate
‘ground. The camera can also be used for regu
20 by screws, and to the outer plate 2| by screws
lar aerial photographic work. It is perfectly
them the photographing of ?ight instruments in
'an airplane in ?ight, or instruments used in run
ning various tests, such as manometers, and for
almost any purpose requiring a self-contained
camera that makes an exposure upon the closing
of an electric circuit and then automaticaily re 40
adapted for uses involving setting up a camera
in a permanent installation so as to make photo
graphs at predetermined intervals, the electrical 50
circuit being closed by means of a time clock
or any other suitable device. Since the camera
.is so constructed that lenses of almost any focal
length can be used, the camera need not be close
to the object being photographed. Another use 'on L1
or in other suitable manner not herein indi
Attached to the mechanism plate 20 is a mech
anism housing cover 3| by screws 32, 32, as shown
in Fig. 1, and the lens “cone” (indicated gen
erally at 33) is attached to the “cone” support
casting 29 by screws 34, 34.. The said lens “cone”
33 is provided with a bushing 35 into which is
threaded the lens barrel 36 of any suitable type
for which this camera is perfectly adapted is for
- and structure.
photographing games, such as baseball games,
Enclosing the entire camera is a cover of gen
wherein several of such cameras will be mounted
eral rectangular shape made up of two parts 31,
and directed at certain spots, such as the various
bases, the pitcher’s box, or any other desired area, iii) 38, completely enclosing the camera parts be
so that one operator can control any one of the
cameras at the pro-per instant by pushing a butw
ton and closing an electrical circuit. Such uses
will serve to point out the versatility of this
’ camera.
Among the numerous objects of this invention
tween the plates 20, 2| (best indicated in Fig. 4).
The mechanism plate 20 is provided with a groove
39 into which the cover member 31 is ?tted and
the lens “cone” casting 29 is provided with a
similar groove 4|] indicated in dotted lines in
Figs. 10 and 11 and in solid lines in Fig. 5. The
are: to provide a camera of comparatively sim
structure is thus completely light-tight. The said
ple, sturdy construction, thus making it possible
within the body of the camera; to provide a
cover consisting of the two cover members 31,
38 is provided with a clamp nut 4| (best shown
in Fig. 4) threaded onto a stud 42 attached to
the outer plate 2|, thus providing means for se
curely holding the camera cover in the camera
camera especially adapted for remote control;
to manufacture it in large quantities at a very
low cost and one that is foolproof in operationj
to provide a camera having a drive motor built
In Fig. 4 is represented a ?lm idler roll 43
‘means that is controlled by the operation of the 75 provided with a shaft 44 free to turn in a bush
to provide a camera having an automatic cycling
ing 45 mounted in the outer plate 2| and in a
bushing 46 mounted on the mechanism plate 26.
Also mounted between the mechanism plate 25
and the outer plate 2| is a measuring r011 41
contraclockwise direction, viewing Figs. 10 and
11, the pressure plate or pad 55 will be caused to
be lifted from the sensitized material 5c, and
when released the shaft 12 will be caused to turn
in a clockwise direction, thus applying pressure
to the sensitized material 89 through the ten
sion of spring 51. rl‘he said bell crank 52 is pro
having a shaft 48, one end whereof passes through
a bushing 49 in said outer plate 2|. The op
posite end of the shaft 48 passes through a bush
vided with a second arm 95 that engages the L~
ing 50 and the mechanism plate 20. To the
or turned-over end 85 of the pressure pad
outer right-hand or lower end of the shaft 48
(viewing Fig. 4) is attached a measuring cam 51, 10 operating arm 54-. Thus any movement of the
bell crank 52 in a contraclcclzwise direction will
more fully described subsequently. Fitted over
cause the shaft '32 also to be turned
a contra
the measuring roll 41 (as shown in Fig. 4) is a
clockwise direction.
rubber cylinder or sleeve 52 so as to provide suf
The structure thus far referred to is that per
?lm material,
said measuring
roll to
taining to or constituting the general structure
of the camera, excepting‘ that structure relating
measure off the proper amount of film as it passes
to the pressure piate or pad mechanism. My in
around the measuring r011 41.
vention is not limited to a camera of the speci?c
Attached to the central channel member 22,
structure thus far described, which has been set
as best shown in Fig. 4, is an aperture plate 53
by means of screws 54, 54 passingr through bush 20 forth rserely as one embodiment of means for
supporting those portions of the photographic
ings 55, 55 and threaded into the central chan
mechanism to which my invention more particu
nel member 22. Said bushings 55, 55 serve to
larly applies.v
guide the ?lm through the camera and also prop
mechanism-4i will next describe
erly to position the pressure plate or pad 56.
the shutter mechanism, which is motor driven by
As best shown in Figs. 4 and 10, to the mech
an electric motor within the camera body, and
anism plate 20 is attached a ?lm support stud
which shutter is preferably of the two-curtain
5?, and to the outer plate 2| is attached a sec~
focal-plane shutter type providing, if desired, a
end ?lm support stud 58, not mounted directly
variable aperture, and which shutter is self~cap~
on the outer plate 2! but carried by‘a spring
member 59 carried by said plate 2!. Also at 30 ping while being wound. 11 cooperation with
the shut
there is provided automatic cycling
tached to the outer plate 2! is a second ?lm
means controlled by the operation of the shutter
spool support stud 60 by means of a spring 55.
itself. so that after each operation the'camera
The springs 59 and Bi are most clearly shown in
As shown in Fig. 4, to the mechanism plate
is ready for the next operation.
scrioe without limiting myself thereto
the specific construction provided for this pur
2?) is attached a bushing 62 held to said mecha—
pose, and in so doing I will rei'er particularly to
nism plate 29 by nut 63 and washer 64. Pass
ing through the bushing 62 is a shaft 65 hav
ing the usual ?lm spool driving dog 56. To the
opposite end of the shaft 65, as shown in Fig. 10,
The camera is provided with a first curtain
take-up roller 95, shown in solid lines in Fig, 5
4. suitable
They manner.
are riveted to the outer plate
lines in
a, and with a second
curtain tal<e~up roller 52
shown in said
?gures. Each of said curtains is provided with
the usual tension roller, the ?rst curtain tension
roller being indicated at 933, in dotted lines in
Referring to Fig. 4i, the pressure plate or pad
Fig. 4,
the second curtain tension roller 94
in Figs. It and 16:. They
also shown
55 is provided with a hinge member TE! attached
subsequently referred to views Figs. 2-5 to 28.
thereto by rivets ‘H, ‘H. Passing through the
In Fig. 5, indicating certain of the parts in
mechanism plate 2d and the outer plate 25 is a
shaft '12, and mounted thereon is a hub ‘53, shown 50 vertical section and showing many of the parts
‘rat are fitted to the mechanism plate 22.“, there
in Fig. 4 as locked to the shaft '52 by a lock screw
is shown therein a bushing
through which
7d. Attached to the shaft l2, as to the hub l3
passes the shaft
of the second curtain take-up
thereof, in any well known manner, is an arm ‘55
roller 92, to which shaft is attached in any suit
provided with a pin ‘75 engaging a hole in the
hinge member it. On the opposite end of the 55 able manner a pinion fl'i meshing with the sec
ond curtain rewind gear 58. Also ?tted to the
shaft 72 adjacent to the mechanism plate 25 is
said mechanism plate “25 is another bushing 99
a second hub ll having a lock screw ‘Hi. The
through whic passes the shaft Hill of the said
hub T! is also provided with an arm ‘Hi and a pin
first curtain take-up roller 5i, and to the left
85, the latter engaging a second hole in the hinge
member ll}.
60 hand end of said shaft Hill is attached the ?rst
curtain pinion iiii meshing with the
Fitted to the right-hand end of the shaft 72,
tain rewind gear [52, which with the second cur
viewing Fig. 4, is a hub 84 having attached there
tain rewind gear 58 are carried on a stud shaft
to a bell crank 82 with
lateral extension 82a
or stud [53, best indicated in
5, 15 and 17.
at its lower
shown most clearly in Fig. 10.
is a ?lm feed gear 61 provided with a hub 63
and a lock screw 69. The said ?lm feed gear and
its function will be more fully referred to sub
Free to turn on the shaft 72 is a washer
65 The said shaft or stud 553 is provic. .d with a sepa
rating collar 1M and has a reduced diameter
MM and a threaded end portion M5. The said
said pressure
operating arm er. is provided
shaft or stud passes through the said mechanism
plate is and is securely held thereto
nut £55
with an L ~shaped end 55 prov ed with a hole
into which is hooked the spring 5?, the opposite 70 and lock washer N37.
end whereof‘ is anchored to the spring support
The second curtain rewind gear 58 and the
rod 83, as shown most clearly in Figs. 10 and 11.
?rst curtain rewind gear 552, as most clearly
Inasmuch as the pressure pad operating arm 84
shown in Figs. 5, l5 and 17, are mounted on said
is securely attached to the shaft 12, when the
, shaft I53. rThe said ?rst curtain rewind gear I02
pressure pad operating arm 85 is turned in a 75 is provided with a hub I53, a b ‘shing I98, a sec
ratin:I the pressure pad operat' -g arm 54 that is
riveted to
As in. .. ated in Fig. 10,
ond curtain drive stud H0 and a ?rst curtain
?lm feed drive gear I43 meshes with the ?lm feed
drive stud III. The said second curtain drive
clutch gear I50 (Fig. 13), and the interrupted
stud IIO is shown in Fig. 9 as riveted to the said
gear I44 co-acts with a second interrupted gear
?rst curtain rewind gear I02. The said first cur
I5I, best shown in Fig. 14, so as to provide an in
tain drive stud I I I has a neck portion I I2 passing
terrupted motion to the shutter rewind mecha
through the ?rst curtain rewind gear I02 and
through a collar I13, and is riveted as shown in
Still referring to Fig. 12, ?tted to the mecha
said Fig. 9. The said collar II3 forms driving
nism plate 20 and securely anchored thereto, is
means for driving the said second curtain rewind
a stud I52 having an enlarged diameter or shoul
gear 98, which is also provided with a hub H4 10 der I53, a reduced diameter I54, a washer I55
and a bushing II4a. As shown most clearly in
and a large head screw I56. The said interrupt
Fig. '7, a second curtain rewind gear driving stud
ed gear I5I is ?tted to the reduced diameter I54
I I5 is attached to the second curtain rewind gear
of said stud I52, and is free to rotate thereon.
98 by riveting or otherwise, and in the same man
Attached to the interrupted gear I5I is a drive
ner shutter release stud I I6 is also attached. Also
gear I51 by means of rivets I58, and said drive
?tted to the said shaft I03 is a main shutter gear
gear I51 is caused to be rotated intermittently
II1 having a bushing [Na and attached to said
through the gears I5I and I44, the said gear I44
latter gear is a driving plate II8, shown upon a
being driven by the said electric motor I23.
larger scale in Figs. 17, 18 and 19, and to which
Referring particularly to Figs. 10, 11 and 12, to
is attached, as shown in Fig. 15, the shutter re
the mechanism plate 20 is ?tted a stud I59 hav
wind clutch member II9 by means of rivets I20.
ing a reduced diameter I60 passing through said
The said second curtain rewind gear 83, the first
mechanism plate 20 and locked thereto by Washer
curtain rewind gear I02 and the main shutter
I6I and nut I62 threaded to the threaded pro»
rewind gear II1 are, as stated, all carried on the
jection I59a of the said stud I59, which is pro
shaft I03, being held thereto by a large head
vided with an enlarged diameter forming a collar
screw I22.
I63. The said stud I59 extends outward suffi
I will now describe in detail the electric motor
ciently far to provide a bearing for a dial for
drive for the shutter, and will refer to Figs. 10,
counting the number of exposures upon the ?lm,
11 and 12, and more particularly to Fig. 16.
which dial will be described in detail subsequently.
I preferably provide an electric motor of a con- >
In Fig. 12 is represented at I64 an extension of
ventional type procurable on the open market, but
the stud I59. Fitted over said stud I 59 at its in
having a speed reducing transmission built there
ner end is a washer I65, and free to rotate on
on. Such a motor is diagrammatically indicated
said stud IE6 is a bushing I66 which has a press
at I23 as attached to the inner face of the mech
.fit in an idler gear I61. Upon the extension I64
anism plate 20 by screws I24, I24. As shown in
of the stud I58 is ?tted a knob I 68, shown in Figs.
Fig. 16, a pinion I25 is attached directly to the
10, l1 and 12, to which is attached a counter dial
motor armature shaft and meshes with an in
I69 of saucer~like formation, and a ratchet wheel
termediate gear I26 carried on a shaft I21, run
I10, both securely held to the knob I68, as best
ning in bushings I28 in one wall of the gear hous
shown in Fig. 12. The knob I68 is provided with
ing, and in a bushing I29 in the gear cover plate
a shoulder HI and is held on the extension I64
I30, which is itself attached to the motor housing
of the stud I59 by means of the mechanism cover
by shoulder screws I30a, I30a. Also mounted on
3 I, which, as shown, has a suitable hole through
the said shaft I21 is a pinion I3I meshing with
which passes the reduced diameter of said knob
a second intermediate gear I32 carried on a shaft
I68. Fitted upon the said knob I68, as best shown
I33 which runs in a bushing I34 ?tted to one wall 45 in Fig. 12, is a coiled spring I12 having an out
of the gear housing and in a second bushing I35
wardly extending end I13 engaged by a turned
?tted to the gear housing cover plate I30. Also
in slotted portion I14 of the said cover 3|. The
mounted on the shaft I33 is a pinion I36 that
said counter-dial I 68 is provided with a series
meshes with a drive gear I31 attached to the main
of numbers I15, shown in Figs. 10 and 11, corre
drive shaft I38, being ?tted into a bushing I39 50 sponding to the number of exposures that has
and passing through the mechanism plate 20 and
been made. The coil spring I12 acts as a one
securely attached to the gear housing cover plate
way clutch on the said counter-dial knob I68.
The purpose of this construction will be more
Still referring particularly to Figs. 10, 11, 12 and
fully set forth in the description of the operation
16, the shaft I38 is provided with a reduced di 55 of the camera.
ameter I46, to which is ?tted a hub I4I keyed
Still referring to Figs. 10, 11 and 12, and also
thereto by pin I42. Attached to the hub MI is
and particularly to Fig. 15, there is ?tted to the
a ?lm feed drive gear I43 and an interrupted gear
mechanism plate 20 a stud I 16 having a head
I44, also shown in Fig. 111. The said gears I43
I11, a reduced diameter portion I18 and a thread
and I44 are attached to the hub member MI by
60 ed end I18, the said stud being ?tted to the said
through rivets I45, I45, and ?tted to said hub
mechanism plate 20 by such reduced diameter
MI is a cam plate I46, while ?tted over the re
portion I18 which is itself ?tted into a suitable
duced diameter I40 of the shaft I38 is a crank
hole provided therefor and is securely locked by
member I41 provided with a pin I48. The crank
a Washer I86 and a nut I8I. Fitted to the stud
member I41, cam plate I 46 and hub member I4I
I13 between the head I11 and the washer I82 is
are all securely attached to the shaft I 38 by a 65 ,a bushing I 83 which is free to turn on the stud
large head screw I49, said hub member I4I be
I16 but has a press ?t in a second idler gear I84
ing keyed to the shaft I38, so that its position
meshing with the main shutter rewind gear II1
with respect to that shaft is ?xed.
for rewinding the shutter curtains.
As shown most particularly in Figs. 10, 11, 12,
Referring now to Figs. 10, 11, 13 and 16, and
the cam plate I46 and the crank member I41 can
be adjusted circumferentially with respect to the
shaft I38 by loosening the screw I48, and when
the proper position is found, they are securely
clamped in place by said screw I49. The said 75
particularly to Fig. 13, wherein the structure to
be described is shown in section, there is riveted
to the mechanism plate 20 a stud I 85 having an
enlarged shoulder I86 and a reduced diameter
I81 passing through a suitable hole in the mech
anism plate 2% and riveted thereto.v Fitted over
the stud its is a bushing I88 over which itself is
?tted a
clutch drive gear its provided with
a hub I?il, to which hub is ?tted a spacing plate
ISI and an overrunning interclutch member I92,
the said clutch member I82, the spacing plate I9!
and the ?lm clutch gear I89 being riveted to—
upper end of the bell crank 263 is a'flnger-like
extension 20'! for engaging a notch‘ 208 of the
?lm measuring cam 5i, previously referred to,
such notch being best shown in Fig. 11. About
the stud 2llI of, the hub or bushing 292 is a spring
2119, one end whereof is hooked around one of the
motor screws are and the opposite end whereof
is hooked to the bell crank ‘£383, causing the lat
gether by shoulder rivets I93, I93 passing through
ter to be turned in a clockwise direction.
suitable holes provided in the parts.
When the ?nger 20-‘! of the bell crank 293 is
Referring to Fig. 13, running on the outer sur 10
held out of the notch 268 of the said ?lm meas
face of the interclutch member I92 is the ?lm
uring cam 5'I , the ratchet plate l94 will be allowed
feed clutch gear E55 previously referred to, and
to rotate, thus causing the ?lm clutch drive gear
that meshes with the previously described ?lm
rat to be driven through the clutch members
feed drive gear I43. Also ?tted to the hub I93 is
a ratchet plate I95 provided with studs I95, I95, 15 previously referred to.
Since the said clutch drive gear IE9 is in mesh‘
passing through the ratchet plate I84 and engag
with the ?lm feed gear 6'5, as shown in Fig. 10, the
ing clutch rollers, one of which is shown at IE5
spool will be caused to rotate in a contra
in Fig. 13, the said ratchet plate I?t being pro
clcckwise direction,’ winding the ?lm until the
vided with clearance holes I?ta to allow free
clutch drive gear I69 is again stopped.
movement of the shoulder rivets I93, I93. This
As the film moves over the measuring roll 41,
entire assembly is held to the stud £85 by a re
' the said measuring roll will make one revolution,
taining plate I91 and a lock screw I98.
as will also the ?lm measuring cam 51, and the
The interclutch member I92 is provided with
notch 2E8 will be engaged by the ?nger 261, thus
usual notches I953, shown in dotted lines in Figs.
permitting the bell crank 233 to rotate in a clock
10 and 11. The rollers leis‘ are ?tted in the said
wise direction under the in?uence of the spring
notches use. Connecting the shoulder rivets I93,
269, and the dog 285 will engage the teeth- of
E95 are springs 28%. Inasmuch as the shoulder
the ratchet wheel I54, disengaging the clutch and
rivet IE3 is permanently attached to the inter
the clutch drive gear I89, and the gear 6'! will be
clutch member IQ? and the shoulder rivet I95 is
securely attached to the ratchet plate Iell, the 30 stopped from further rotation. The measuring
roll 4'! and its rubber sleeve 52 are of such diam
said springs 2% will cause the said ratchet plate
eter as to cause just su?icient ?lm to be fed when
to be turned in a clockwise direction, thereby
making one revolution to provide a new area of
causing the rollers E55 to engage the bore of the
sensitized material for the next exposure.
?lm feed clutch gear ltii. If such latter gear Kit
The electric switches.—1 will now particularly
is caused to be turned in a clockwise direction, 35
refer to the electrical switches and cooperating
the rollers I96 will be caused to move in a clock
parts, by which not only the feed of the ?lm is
wise direction, thus wedging between the inter
controlled, but also the operation of the shutter,
clutch member E52 and the bore of the ?lm feed
and will ?rst refer particularly to Figs. 10 and 11.
clutch gear E59, thereby causing the said inter
To the mechanism plate 20 is attached a switch
clutch member I92 to be also driven in a clock
support plate 2H] by means of rivets 2H, 2H
wise direction.
however, the teeth of the
and to said switch support plate 2 I 0 is attached a
ratchet gear or plate its are engaged and pre
switch 2I2, being a standard switch of any one
vented from moving, the rollers i953 will be pre
of several di?erent acceptable types. Herein for
vented from moving in a clockwise direction, thus
the purpose I have illustrated a switch known in
releasing them from engagement with the bore of
the trade as the “Acro” switch, which is attached
the said ?lm feed clutch gear
When the
to the said switch support plate by screws 2I3,
said ratchet wheel or plate I94
released, the
213. The said switch H2 is provided with con
springs 22%] will again cause the rollers I95 to be
tacts 2I4, 2I5 and 2H3. The contact 2I6 is car
moved in a clockwise direction, and the inter
cluteh member I92 will be driven by the said .
rollers H35 and the ?lm feed clutch gear I542.
The full purpose of the structure just described
in detail will be fully set forth in connection with
ried on a spring 2IT actuated by a semicircular
spring 2“? through a short ?at spring 2I9 and a
pin 229. When said pin 225] is moved in an up
ward direction viewing Figs. 10 and 11, the po
sition of the semicircular spring 2IB is changed,
thus altering the center of effort, causing the
spring 2H to be moved downward, thus closing
The film feed mechanism-J will next describe
contacts Zl? and ‘M5. When the pin 223 is re
the ?lm feed mechanism, not herein claimed, fol
leased, it will be moved in a downward direction
lowing which I will set forth in detail the electri
by the spring 2 I 9, thus again changing the center
cal mechanism 3y means of which the ?lm is fed
for the successive exposures and by which the 60 of effort of spring ZIS and causing the spring 2 If
to be moved in an upward direction, thus caus
shutter is operated, and the means by which the
ing the meeting of contacts 2N5 and 2H.
automatic cycling is controlled by the operation
The said switch 2I2 is actuated by the bell
of the shutter itself. I will ?rst refer to Figs. 4,
crank 82, previously described and shown most
1%) and ll.
clearly in Fig. 10. The said bell crank I32 is pro
On the mechanism plate 2E} is mounted a stud
vided for the purpose with an arm 221 having a
29! to which is attached a bushing 292 having
turned-over end 222 for col-acting with the pin 22.8.
riveted thereto a ?lm feed clutch bell crank 2E3
The said bell crank 82 is acted upon by the cam
held to the stud 2th by shoulder screw EM and
plate I45, previously described, through the ?nger
provided with a cam-shaped formation 205 for
engaging the pin Hi8 previously referred to as 70 stat of the bell crank 82 when the ?lm feed drive
gear M3 is rotated, as will be subsequently more
provided on the crank member I41. The pur
fully described.
pose of the pin its will be more fully set forth
Still referring to Figs. 10 and 11, attached to
subsequently. The upper arm of the bell crank
the said mechanism plate Ed is a second switch
253 is provided with a dog 2% to engage the teeth
support plate 223 by means of rivets 224 and at
of the ratchet wheel its, and on the extreme
the explanation of the complete operation of the
tached to the ‘said support plate is a switch 225
of structure preferably similar to the switch 2l2
excepting that it is provided with contacts 226
and 221 only. The said switch 225 is also pro~
end of said armature being provided with a hook
member 258 having a slot 259. Securely attached
to the said crank arm 24‘! is a pin 253 which is
‘acted upon by the hook member 258 when the
solenoid 25! is energized. When the circuit is
broken, the spring 251 causes the solenoid plunger
vided with a similar semicircular spring 223, a
contact spring 229, a short actuating spring 23c
and an operating pin 23!. The said switch 225
or armature to be moved a su?icient distance to
is attached to the switch support plate 223 by
the right, viewing Figs. 10 and 11 co-acting with
screws 232, 232.
the collar 256 to that end. A stop pin 26] is
Switch operating mechanism.-—-I will next de 10 provided on the mechanism plate 20 and there is
scribe the switch operating mechanism for the
electrical circuit controlling the shutter and ?lm
also provided a cooperating protruding lip 262
feeding means, and for that purpose I will refer to
Figs. 10 and 11 and also to Fig. 5.
Mounted upon the said mechanism plate 20 is a 15
switch operating lever 233 pivoted to a stud 234
on said plate, said operating lever being securely
held upon the stud 234, so as freely to rotate
thereon, by means of a large head screw 234a, and
said operating lever is provided with a notch 235 20
to limit its motion, said notch co-acting with a
pin 236 on the mechanism plate 20. The said '
switch operating lever is moved in a clockwise di
rection by a spring 231 ?tted over a stud 238 at
The shutter curtain roZlers.—I have previously
described the structure of the two-curtain shutter
excepting as to certain details of the tension roll
ers and take-up rollers thereof, which I will now
set forth.
Inasmuch as the spring take-up roller 93 for
the ?rst curtain and the spring take-up roller 94
on the said crank arm 241.
tached to the said operating lever and pressing
against the switch housing of the switch 225.
The said switch operating lever 233 serves both
for the second curtain are of identical construc
tion, I will for brevity here describe or refer only
to tension roller 94, and will refer particularly to
Fig. 16, but it is to be understood that both said
rollers have the same structure.
Fitted into a hole provided therefor in the
mechanism plate 20 is a shaft 563 extending
through said tension roller 94 and through the
outer plate 2i, and securely locked thereto by
as a switch operating lever and also as a shutter
run-down stop lever, it being engaged by the pin
means of a washer 254 and a nut 255, as shown in
or stud H6 on the second curtain rewind gear 98 30 Fig. 4. Said tension rollers 93 and 94 are pro
when the shutter is released and runs all the way
vided with bushings 266 on either end. Each such
down, thus limiting the motion of the said sec
ond curtain rewind gear 98. At the same time
it causes the contacts 226 and 22'! to be closed,
thus completing the circuit to the motor in a
manner herein subsequently described.
Referring particularly to Fig. 11, there is at
tached to the lower end of the bell crank 82 a
short L-shaped arm 239 by means of a shoulder
bushing on the right-hand end, viewing Fig. 16, is
provided with a hole through which passes the
end 261 of the tension spring its, thus locking
one end of said spring to the proper tension roller.
The opposite end of said tension spring 268 is
anchored to the shaft 2'53, but is not herein shown.
Between each bushing 263 and the mechanism
plate 20 is a thrust washer 239, and between such
bushing 2:36 on the opposite end of said curtain
tension roller and the outer plate 2! is a second
thrust washer 21a, shown in Fig. 4.
The two-curtain shutter movemcnts.-I will
now describe the shutter, and for that purpose I
45 will refer mainly to the vertical sectional View
rivet 249, the said L-shaped arm being caused to
be rotated in a contraclockwise direction under
the influence of a spring 24| ?tted around said
shoulder rivet 240, one end of said spring being
connected to the bell crank 82 and the oppo
site end to said L-shaped arm 239. When the
bell crank 82 is caused to be moved to the right
or contraclockwise viewing Fig. 11 by the cam I46,
the teeth of ratchet wheel I19 will be engaged,
thus causing the exposure counter-dial IE9 to be
rotated in a contraclockwise direction, said dial 50
being prevented from turning clockwise by the
clutch spring I12.
Still referring to Figs. 5, 10 and 11, there is
attached _to the mechanism plate 2:! a bushing
(Fig. 5), to the sectional views (Figs. 17, 18 and
19) showing the shutter rewinding mechanism, to
Figs. 20 to 24 showing different positions of such
rewinding mechanism, and to Figs. 25 to 31 show
ing the two curtains in longitudinal section and
in plan.
Attached to the ?rst curtain tension roller 93
and partly wound thereon and attached also to
the ?rst curtain take~up roller 9!, is the ?rst cur
243 through which passes a shaft 244 having a 55 tain 2H provided with an exposure slot or open~
reduced diameter indicated in dotted lines at 245,
ing 212 and having the usual curtain struts 213,
and to which is there ?tted a hub 246 having
213. Attached to the second curtain tension roll
an attached crank arm 24'! securely attached to
er 94 and partly wound thereon is the second cur
hub 246 by shoulder screw 248 which serves to
tain 214 which at its opposite end is attached to
attach both parts to the shaft 244. The opposite
the second curtain take-up roller 92. The said
end of the shaft 244 is provided with an enlarged
second curtain 214 is provided with an exposure
diameter 249 to which is securely attached a
slot or opening 275 having the usual struts 216,
shutter release lever 250 which is provided to
216. The ?rst curtain take~up roller 9| is con
engage the pin or stud H6 when the shutter is
as shown in Figs. 8 and 9 to the ?rst cur
fully wound.
65 tain rewind gear I02 by means of pinion NH and
Still referring to Figs. 10 and 11, attached to
shaft [00. The second curtain take-up roller 92
the mechanism plate 20 is a magnetic solenoid 25|
is, as shown in Figs. 6 and 7, connected to the
(indicated also in the diagram Fig. 3) by means
second curtain rewind gear 98 by means of the
of a strap 252, bolts 253 and nuts 254, said solenoid
pinion 3‘! on the shaft 93. When said second
having the usual plunger or armature shown in
70 and first curtain rewind gears 93 and I92 are
dotted lines in said ?gures and indicated at 255,
caused to be turned in a contraclockwise direction,
and which is provided with an enlarged collar
the said take-up curtain rollers 9i and 92 will be
256 between which and the solenoid housing is a
caused to turn in a clockwise direction, thus wind
spring 25'! causing the armature to move to the
ing said ?rst and second curtains 2'1], 224 upon
right viewing Figs. 10 and 11, the right-hand
their respective take-up rollers.
The main shutter rewind gear I I1 (Figs. 17, 18
and 19) is caused to be turned in a contraclock
wise direction by means to be subsequently more
fully referred to, carrying with it the driving plate
H8 and the shutter rewind clutch member H9.
The end of the shutter rewind clutch Ilsa, Fig.
18, will engage the stud ill of the ?rst curtain
rewind gear 592, causing it to bejturned in a con
traclockwise direction, causing pinion IBI to be
for making an exposure, throughout that ex
posure, and are stopped together.
The two-curtain shutter herein disclosed is
made up of two curtains, each having an aper
ture that together form an exposure aperture
when the shutter curtains are traveling in one
direction, and said apertures are so spaced when
the curtain is rewound as to constitute self-cap
pin‘g means. At the completion of the rewind
turned in a clockwise direction, and causing the 10 ing cycle of the shutter, both. curtains are wound
?rst curtain take-up roller 9| also to be turned in
up together in a light-tight condition until both
a clockwise direction, thus winding said ?rst cur
the curtain apertures have traveled past the ex
tain 2H on its take-up roller M. The second
posure opening of the camera in rewinding and
curtain rewind gear 98 will also be driven in a
then, as stated, just before the rewinding is com
contraclockwise direction by reason of the collar 15 pleted, the ?rst curtain is released and allowed
H3 engaging the stud IE5 of the second curtain
to run back a very short predetermined distance.
thus forming the exposure aperture by having
rewind gear 98 after said ?rst curtain has traveled
the two curtain apertures in alignment.
a distance su??cient to cap the second curtain 2'54,
as shown in Fig. 25. The pinion 9'! will now be
This has never been accomplished in the prior
turned in a clockwise direction, thus winding said
art, which at the most discloses a twomcurtain
second curtain 2N; on its take-up roller 92, and.
shutter wherein, when making an exposure, the
curtain aperture is established when rewinding
when said second curtain reaches the position
shown in Fig. 26, the ?rst curtain rewind gear
the curtain by causing the second curtain to
102 is caused to be isengaged from the stud III
stop and allowing the ?rst curtain to continue
by reason of the cam plate 21'! attached to the 25 winding until a slot is establishedand it is held
mechanism plate Ed by rivets 218, 218, as shown
in that position until both curtains are released,
whereupon they start to travel across the expo
in Fig. 17.
sure opening, and when the second curtain strut
As the main shutter rewind gear Ii‘! continues
has passed the camera exposure opening, that
to turn in a clockwise direction, the curved end
Hill) of the shutter rewind. clutch member H9 30 curtain is stopped but the ?rst curtain continues
to travel past the exposure opening of the camera
will ride along the under face of the cam 211', thus
disengaging the end i I to of the said clutch mem
and past the strut of the second curtain, thus
capping the shutter. Such a construction pro~
ber i I9 from the stud I I I, as shown in Fig. 19, but
just previous to such disengagement the stud or
vides no control of the curtain aperture except
pin IIG has moved past the end of the shutter 35 for a very narrow slot, and such construction
would be ineffective for wider slots or for a full
release lever 250 (best shown in Figs, 10 and 11),
aperture slot such as used for slow exposures.
thus preventing the second curtain rewind gear 88
The shutter disclosed herein is capable of oper
from turning in a clockwise direction when the
ating at very high speeds, particularly because
stud. I I i becomes disengaged from the shutter re
wind clutch member I It’, as previously described, 40 when the shutter runs down, nothing rotates ex
cept the pinions 9i’ and Mi and their drive gears
so that the ?rst curtain rewind gear H12 will be
98 and I02, as such gears are wholly disconnected
permitted to turn in a clockwise direction until
irom the rewind gear ii? when making an ex
the stud H8 engages the stud II5 of the second
curtain rewind gear 98, thus preventing further
A résumé of the two-curtain shutter move
movement of said ?rst curtain rewind gear I82
ments is as follows, reference being made to Figs.
in a clockwise direction, as indicated in Fig, 19.
5, 10, 11 and 1'7 to 22. The ?rst curtain 2?! has
The two curtains will now be in the position
an aperture 2Y2, a rewinding roller shaft IQEI
shown in Fig. 27 with the exposure slot or open
having a pinion Iii! meshing with rewinding gear
ing A formed between said two curtains.
£52, The second curtain 2213 has an aperture 2'i5,
It will be evident from the drawings and from ,.
the foregoing description that the curtain aper
a rewind shaft 96 carrying a second curtain re
wind roller 92 and has a pinion 9'? meshing with
ture is determined through the manipulation. of
the second curtain rewind gear 98. In Fig. 5 the
the second curtain. The curtain slot is estab
shutter is in a fully rewound condition. The gear
lished, as shown in Fig. 27, at the completion of
98 is prevented from turning in a clockwise direc
the rewinding of the shutter, and the position
tion by shutter release lever 256i and pin I it, and
of the struts 213, 2'55
under control; that is,
rewind gear “32 is prevented from turning in a
their rate of movement is in control with respect
to each other throughout the exposure regardless
clockwise direction because of pin N5 of gear
98 engaging pin iii? of gear Hi2. Since the cur
of the initial separation of struts 273, 215. Both
tain rollers are driven by the gears just recited,
curtains continue to travel across the exposure
opening of the camera and are stopped together
they too will be held from turning. To make an
exposure, shutter release lever
is disengage.
after they have made a complete exposure and
from pin N2 of second curtain rewind gear 93,
are not capped until the commencement of the
allowing it to turn. This will also allow ?rst
rewinding cycle. This is because the second
curtain rewind gear iii? to turn, both gears
curtain is caused to move ?rst, and then the ?rst
curtain is picked up. After the apertures have
turning in a clockwise direction. First curtain
been capped, the curtains travel across the ex
sear Hi2 cannot turn faster than second curtain
gear Q8 because pin Ilii of gear i632 cannot pass
posure opening in the capped condition, and
pin iii? of gear $18, and since ?rst curtain 2'“ is
when the shutter reaches a point just before
being fully rewound, the ?rst curtain is released 70 provided with a slightly higher spring tension
and allowed to run in a direction toward an ex
posure opening, and thereby establishes the cur
tain aperture. Both curtains always travel ex
actly the same distance in each half cycle; that
is, both curtains travel together when released 75
than second curtain 2T4, pin He will be held
in contact with pin M5 throughout the exposure
travel. When the curtain is fully run down,
second curtain gear 98 will be stopped through
pin H6 engaging switch lever 233 (see Fig. 11)
and, of course, ?rst curtain will also be stopped
because of pins H0, H5. In rewinding, main
viously described, thus winding the first curtain
2H into the position shown in Fig. 25, in which
position said first curtain caps the exposure slot
or aperture 215 of the second curtain 214, which
reciprocally caps the exposure slot or aperture
clockwise direction through clutch member H9
212 of the ?rst curtain 21!. The collar H3 will
engaging pin III of gear I02. Gear I02 will con
then engage the stud H5, causing the second
curtain 2M to be driven until the main shutter
tinue to rotate carrying with it pin H3 and,
when pin H3 engages pin H5 of the second cur
rewind gear III makes a complete revolution,
tain rewind gear 98, it too will be caused to turn, 10 and before the end of such complete revolution
but while gear I02 was turning through that part
the shutter rewind member I 59 will be disengaged
of a revolution represented by‘ the spacing of
from the stud I I I through the action of the cam
plate 21'? engaging said shutter rewind member
pins HE! and H3, the ?rst curtain will have been
moved suf?ciently far to cap the exposure open
ing. Both gears I532 and 98 will continue to ro 15
In Fig. 23 is shown the relation of the said
shutter rewind member H9 just before its action
tate until pin H6 has been engaged by shutter
release lever 25!) and at substantially the same
upon the cam plate ?ll, and in Fig. 24 the shut
ter rewind member H9 is shown as having been
time clutch member H9 will be disengaged from
pin III of gear I02, thus preventing any forward
acted upon by the cam plate 2'i'I, so that the
movement of gear Hi2 and gear 98 in a contra 20 stud III has been disengaged and the ?rst cur
tain rewind gear m2 has turned in a clockwise
clockwise direction. Gear I02 will now be caused
direction a distance sufficient to establish the
to turn in a clockwise direction under the in?llcurtain exposure slot or opening.
ence of the ?rst curtain tension roller and will
It will be noted that the ?rst curtain take-up
continue to rotate in a clockwise direction until
stopped by pin H0 of gear I92 engaging pin H5
roller 9I is or a somewhat larger diameter than
the second curtain take-up roller 92. This is for
of gear 98. This movement is suf?cient to allow
the purpose of allowing the ?rst curtain 21! to
the ?rst curtain aperture to travel far enough
move at a slightly greater rate than the second
over the second curtain aperture to establish
the exposure aperture in the pair of curtains.
curtain 2715, so as to allow the aperture A, as
The shutter is now ready for a second exposure.
indicated at Fig. 30, to increase as the two cur
Both curtain rewind gears 98 and I62 and both
tains travel across the exposure opening 221‘) of
curtain rewind rollers 9| and 92 always turn the
the camera.
In Fig, 30, the exposure slot or aperture formed
same amount when the shutter is rewound, but
the ?rst curtain rewind roller is allowed to make
at A at the start of the curtain travel is of less
rewind gear HT is caused to be rotated
contraclockwise direction. First curtain rewind
gear I02 will be caused to be rotated in a contra~
an initial rotation in a curtain-run-down direc
tion just after it has been fully rewound.
In Fig. 20 is shown the position of the several
parts just prior to the act of releasing the ?rst
curtain rewind gear I02 from the shutter re
dimension in its direction of travel than the ex
posure slot or aperture formed at B (Fig. 31)
when the two shutter curtains approach the end
of their travel across the said exposure opening
221) of the camera. This is to compensate for
wind clutch member H9, and it will be noted
curtain acceleration.
that the stud or pin H6 has traveled some little
time is dependent upon the width of the exposure
slot or aperture and curtain speed, and since all
shutter curtains accelerate in their travel from
the curtain take-up roller to» the curtain tension
distance beyond the shutter release lever 25?).
The driving stud III has not at this time been
released, but said stud III is at the point when
any further movement in a ccntraclockwise di
rection of the main shutter rewind gear I I"! will
cause said stud H I to be released, thereby allow
ing both curtain rewind gears 98 and N32 to turn
In other words, exposure
. roller, it is necessary to provide means for com
pensating for this decreasing exposure speed.
In the present invention I accomplish this by
slightly increasing the width of the exposure
slot or aperture A to the width indicated at B.
However, as soon as
the stud or pin H6 of the second curtain rewind Fill I may, however, provide any compensation de
sired, as by adjusting or varying the diameter of
gear 38 reaches the shutter release lever 25?],
said second curtain rewind gear 98 will be held
the curtain take-up rollers 9|,
The camera cycle.-~I will now refer to Fig. 3
from further movement, but the ?rst curtain rc~
wind gear I82 will be allowed to turn in a clock
and Figs. 10 to 16, and will describe a cycle of the
camera when using the curtain shutter mecha—
wise direction until the stud I It) of the ?rst cur
tain rewind gear I02 is stopped by the stud I I5 of
nism and the control therefor just described.
Preliminarily, I state that thus far I have re
the second curtain rewind gear 98. The mecha~
ferred to a shutter mechanism having provision
nism will now be in the position shown in Fig. 21,
and the curtain exposure slot or opening A will
for one width only of the exposure slot or aper
ture. This is entirely satisfactory for a great
be established as shown in Fig. 27.
When the shutter release lever 255i} is operated
number of uses of the camera herein disclosed,
in a clockwise direction.
by the solenoid magnet 2?“, previously referred
to, the pin or stud H8 will be disengaged by the
shutter release lever 250, allowing both said cur
but for other uses of the camera it is necessary
to be able to change the shutter exposure aper
ture width so as to provide a greater range of
shutter speeds.
tain rewind gears ‘.38 and I02 to turn in a c1ock~
The electrical circuit wining.--In Fig. 3, I have
wise direction. The stud l 50 will remain in con
tact with the stud I I5 until the stud or pin I I6 is
shown a diagram of the electrical circuit of the
stopped from further movement by the switch
camera, and in Fig. 10 I show the camera mech
operating lever 233, shown in Fig. 22 and else
anism in condition for making an exposure under
70 the control of such circuit, Fig. 11 ShOWiIlg the
Then the main shutter rewind gear H1 is
condition of the mechanism when the shutter
again caused to be turned in a contraclockwise
curtains have run all the way down.
direction, carrying with it the driving plate 58
The two-curtain shutter in the position of
parts shown in Fig. 10 has been fully rewound
of such shutter rewind member H9, the latter
will engage the stud III in the manner pre 75 and is held in position for making an exposure
by means of the shutter release lever 250 and the
switch 225 to be operated, thereby closing con
stud or pin 116. The switch 225 is in open con
tacts 226, and 221.
dition because the switch operating lever 233
has been moved to the right, viewing Fig. 10, by
the spring 231, and the switch 212 is in condition
to complete a circuit from the receptacle 219 that,
as shown in Figs. 1, 2, 10 and 11, is attached to
the mechanism plate 20 by means of screws 280,
280, inasmuch as the arm 221 of the bell crank
82 has been moved away from the switch pin
220, thus allowing the contacts 214 and 216 to
Current will now ?ow from
the battery 292 through wire 291, wire 301, con
tacts 226 and 221, wire 306 and 304, motor brush
305, through the motor to brush 301 through
either the resistor 291 or the switch 298, through
fuse 296, wire 295, terminal 294, and wire 293 to
the battery 292. Since the brake solenoid 300 is
in parallel with the brushes 301 and 305, current
10 will flow through the solenoid 300, thus causing
the motor brake to be relieved.
be closed. The shutter will now be caused to
The cycle of operation of the mechanism con
operate if the external switch 281 is closed, which
trolling the shutter rewind and the ?Zm.—The
switch can be located anywhere convenient for
electric motor 123 will now start to operate and
the operator, and if desired within or upon the 15 through its speed reducing mechanism previously
camera itself. It is shown merely diagrammat
referred to, it will drive the interrupted gear 144
ically in Fig. 3. A complete description of the
(Fig. 14) in a contraclockwise direction until the
wiring diagram shown in Fig. 3 is as follows:
teeth thereof engage the teeth of the second in
One wire 202 from the switch 281 is connected
terrupted gear 151, at which time the drive gear
to the terminal 283 of the receptacle 219 and a 20 151 will be turned in a clockwise direction and
second wire 284 is connected to that terminal and
the idler gear 161 will be turned in a contra
extends to the contact 214 of the switch 212.
clockwise direction. The intermediate gear 184
Connecting contact 216 is a wire 285 that con
will be turned in a clockwise direction and the
nects to a terminal 286 of a receptacle 281 (shown
main shutter rewind gear 111 in a contraclock
in Figs, 1, 10 and 11) which is held to mecha 25 wise direction, thereby rewinding the two-curtain
nism plate 20 by means of screws 288. A lead
shutter in the manner previously described. Soon
wire 290 is connected to the terminal 286 of the
after the said interrupted toothed gear 144 starts
receptacle 281 that leads to contact 221 of the
to rotate, the nose 82a of the bell crank 82 will
switch 225 and connected to wire 290 is a short
be acted upon by the cam 146, causing the said
lead 291 that connects to the battery 292. The
bell crank 82 to be moved to the right, viewing
other side of the battery 292 is connected by wire
Fig. 11, which movement in a contraclockwise
293 to the termina1 294 of said receptacle 281
direction causes switch operating pin 220 of the
and connected to the terminal 294 by a short
switch 212 to be operated, thereby opening the
wire 295 is a fuse 296. Also connected to said
contacts 214 and 216 and breaking the circuit to
fuse 296 is a short wire that connects with one
the shutter release solenoid 251 and closing the
end of the resistor 291 and to one side of the
contacts 215 and 216, which are shunted around
switch 298. A wire 299 leads from said switch
the contacts 226, and 221 of the switch 225. This
298 and is connected to the other terminal of
continues the circuit to the motor after the sec
said resistor 291 and connects to a motor brake
ond curtain rewind gear 99 starts to rotate in a
solenoid 300. Also connected to the wire 299 is
contraclockwise direction, thus carrying with it
one motor brush 301 and one side of the solenoid
the stud or pin 1 16 from contact with the switch
251. The other side of said solenoid 251 is con
operating lever 233. The switch contacts 226
nected to the terminal 302 of said receptacle 219
and 221 will then be caused to open by the spring
by a Wire 303, Connecting the contact 215 of
231 and the electric motor 123 will continue to
said switch 212 is a wire 304 that connects to
operate until the interrupted toothed gear 144
the motor brush 305 and to said motor brake
has made a complete revolution, at which time
solenoid 300. Also connected with the contact
the nose 82a of the bell crank lever 82 will drop
215 of said switch 212 is a, wire 306 that connects
off the cam 146, thus allowing the bell crank le
with the contact 228 of said switch 225, and con
ver 82 to move to the left (that is, in a clockwise
nected with the contact 221 of the switch 225 is
direction, viewing Figs. 10 and 11), thus allow
a wire 301 that connects to one side of the bat
ing the switch operating pin 220 to move in a
tery 292, and to said lead wire 290 that is con
downward direction, causing the contacts 215 and
nected with the terminal 286 of said receptacle
216 to be opened, thus stopping the motor. This
completes the shutter rewind cycle.
When the mechanism is in the position of parts I
At the commencement of the said cycle, the pin
shown in Fig. 10, switch contacts 226, and'221
M8 carried on the crank member 141 is caused
of switch 225 will be in open condition, and the
to turn in a contraclockwise direction, thus act
contacts 214 and 216 will be in closed condition.
ing upon the cam-shaped formation 205 of the
Therefore, no current will flow to the motor 123
bell crank 203, causing the latter to be turned in
and no current will be ?owing through the brake 60 a contraclockwise direction and at the same time
solenoid 300, but when the switch 281 is closed,
withdrawing the pawl 206 from the teeth of
current will flow from the battery 292 through
ratchet wheel 194. The ?lm feed clutch gear
wire 290, through wire 285, contacts 216 and 214,
150 will now be caused to be driven clockwise
through wire 284, terminal 293, wire 282, switch
through the ?lm feed clutch means, turning said
28!, wire 308, terminal 302, solenoid 251, wire 299 65 ?lm feed gear 61 oontraclockwise, thus winding
and either through the resistor 291 or through
the ?lm on the film take-up spool positioned on
switch 298 through fuse 296, through wire 295,
shaft 65 provided in the stud 60. Film will be
terminal"294, wire 293 and back to the battery
drawn off the spool that is placed upon the studs
292. The solenoid will now cause the shutter re
51 and 58 and will be fed around the idler roll
lease lever 250 to be moved to the right, viewing 70 43, under the pressure pad or plate 56, around
Fig. 10, as previously described, releasing the two
the measuring roll 41 and onto the take-up spool
curtain shutter which will be allowed to run
just referred to.
down, as shown in Fig. 11. :As the said shutter
When su?icient ?lm has passed over the sur
runs down, the pin 116 contacts with the lower
face of the measuring roll 41, the notch 208 of
end of the switch operating lever 233 causing the 75 the measuring cam 51 will reach the position
shown in Fig. 10, wherein the L-shaped ?nger
like member E‘z?'i of the bell crank 2% will drop
into notch
thus allowing the bell crank ‘2&3
to be rotated in a clockwise direction. The pawl
206 will engage the teeth of the ratchet gear or
plate I94, thus disengaging the film feed clutch
gear I50 (Fig. 10), and no further ?lm will be
wound on the film take~up spool.
A complete cycle of operation has now taken
place in the course of which the shutter has been W
released and has run down, the motor has been
energized, the shutter has been completely re
wound, and a new area of film has been fed into
place. As the bell crank 82 was ?rst moved to
the right and then to the left viewing Figs. 10
and 11, the ratchet wheel I19 will have been
caused to move a distance equal to one tooth
of said ratchet wheel, thus advancing the film
counter-dial one numeral, the ?lm counter-dial
previously having been set to the letter “S” when 20
a new supply of ?lm was placed in the camera.
This can be readily done by rotating the knob
I68 in a contraclockwise direction until the let
ter “S” appears in the window shown in dotted
lines as provided in the cover plate 3'! and indi
cated at 3m in Fig. l. The letter “S” is used
upon the camera in place of zero to signal the
start of the ?rst exposure.
curtain in‘ its travel.
As herein disclosed, I ac"
complish this result by providing curtain rewind‘
rollers of contrasting diameter.
I thus cause the
exposure slot or aperture to enlarge as said ex‘
posure slot or aperture travels across the exposure
opening of the camera at a controlled ratev of‘
speed, the means for accomplishing this being the
difference in size of the two~curtain rewind roll
If one of said rollers is larger than the
other, the former will feed off more curtain sub
stance than the other, and if the larger roller
pertains to the leading curtain, this will cause
the exposure slot or aperture to enlarge in size.
If, however, the larger rewind roller pertains to
the second or following curtain, this will cause the
exposure slot or aperture to become smaller‘ dur
ing curtain travel. While this feature of com
pensating for the inevitable acceleration in the
speed of the shutter curtain intimately co-acts
with the disclosed means for adjusting the size
of the shutter exposure aperture prior to the re
lease of the shutter, such matter is not so claimed
herein but is so claimed in my divisional applica
tion Ser. No. 597,864.
Having thus described one illustrative embodi
ment of the invention, it is to be understood that
although specific terms are employed, they are
used in a generic and descriptive sense and not
for purposes of limitation, the scope of the in
The operation of the shutter and cooperating
parts as thus set forth is therefore very clearly 30 vention being set forth in the following claims.
I claim:
distinguished from the electrical control for
1. Motor-driven, self-capping, focal, two-cur
functioning parts of an aerial camera set forth
tain-shutter winding and releasing mechanism
in a co-pending application ?led in the names of
for a photographic camera including, in combina
Louis D. Nadel, Archie I-I. Gorey, Reynold J.
tion: two, closely parallel, cooperating curtains‘
Nitsoh and Oscar Steiner, now Patent No.
each having an aperture which together in the
2,371,592, dated March 13, 1945, wherein the
running-down movement of the shutter consti
shutter is operated mechanically for the making
tute the exposure aperture of the two-curtain
of a picture through cycling mechanism. There
self-capping shutter; tension rollers and take-up
fore, there is no delay in the shutter operation
as the motor does not start to operate until the 40 rollers arranged in respective pairs, supporting
each of said curtains; a ?rst curtain re-wind gear
shutter has been operated and is entirely across
in meshing relation with the ?rst curtain take-up
the exposure aperture of the camera. Hence, it is
roller; a second curtain rewind gear in meshing
relation with the second curtain take-up roller;
pletely across the exposure opening of the cam~ L' said rewind gears being mounted in parallel prox
imity to and‘ co-axial with each other; one of said
era. Therefore, no matter to how fast a speed
rewind gears having ?rst and second curtain
the camera cycle is adjusted, it cannot in the
drive studs laterally projecting therefrom and
present disclosure operate so fast that the shut“
the other rewind gear having a co-acting, later
ter does not have time to travel all the way
ally projecting stud; one of said rewind gears
across the exposure opening of the camera, be~
having a shutter release stud laterally projecting
cause the cycle cannot commence until the shut
impossible to have the cycle take place or even
to begin before the shutter has traveled com-
ter has traveled all the way across the expo-sure
therefrom; a movable shutter release member en~
opening, the rewind cycle being controlled from
the shutter through the operating lever 233, co
acting with the pin H5 and the switch 225.
In the present disclosure there is provided a
true self-capping variable aperture shutter. The
gageable by said shutter.‘ release stud in the‘ rota
tive movement of the rewind gear bearing such
stud and‘ mounted laterally adjacent a face of
such rewind. gear; a main shutter rewind gear
in driving relation with one of said rewind gears
posure opening, thus compensating for the in
evitable acceleration in the speed of the ‘shutter
ber, thereby starting said electric motor; the said
drive and co-acting studs upon the said rewind
and co-axially mounted with respectv to both of
shutter is always rewound in a capped condition
said rewind gears; an electric motor carried by
and the exposure slot or aperture is established
just as the shutter is completely rewound and 60 the camera structure and in driving relation with
said main shutter rewind gear; an electric cir
before releasing it for an exposure. Such con
cuit carried by said camera. for actuating said
struction is therefore clearly distinguished from
electric motor and including a switch control
that shown in the patent to Petit and Hineline
ling said electric motor; a movable switch operat
1,980,546, dated November 13, 1934, wherein the
exposure slot or aperture is adjusted by the oper 65 ing member laterally adjacent a‘ face of the re
wind gear carrying the shutter release stud and
ator prior to making an exposure and that ex
mounted in position to‘ be engaged and operated
posure slot or aperture travels across the ex
by said shutter release stud, when at substan
posure opening both when making an exposure
tially the end of the running-down movement of
and when rewinding the shutter.
the shutter and‘ the accompanying rotative move~
So far as I am aware, I believe that I am the
?rst to provide any means to cause positively an
merit of the said stud-carrying rewind gears, the
said shutter release stud comes into operating
increase in the size of the curtain exposure slot
or aperture as the curtain travels across the ex
relation to said movable switch operating mem
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