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Патент USA US2117694

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May 17, 1938.
H. BECKER
2,117,694
SHUTTER MECHANISM FOR MOVING PICTURE CAMERAS
Filed May 29, 1936
2 Sheets-Sheet l
jf/m/ 2
31d
19
INVENTOR
ATTGRNEY
May 17, 1938.
H. BECKER
2,1 17,694
SHUTTER MECHANISM FOR MOVING PICTURE CAMERAS
Filed May 29, 1936
2 Sheets-Sheet 2
INVENTOR
@Zzzwfémmé
BY .79,» /
2,117,694
Patented May 17, 1938
UNITED STATES PATENT OFFICE
2,117,694
SHUTTE R MECHANISM FOR MOVING
PICTURE CAMERAS
Helmut Becker, Wetzlar, Germany, assignor to
Ernst Leitz, G. in. b. E, Wetzlar, Germany
Application May 29, 1936, Serial No. 82,451
- In Germany June 3, 1935
(CI. 88-16)
8 Claims.
As shown in the drawings the two ?lm driving
The object of this invention is to provide a gears 8 and 8 rotate in anticlockwise direction
novel and improved shutter mechanism for mov
to advance the ?lm and the middle gear pinion
ing picture cameras for automatically operating I0 is in mesh with gear [2. The carrier I3 is
the shutter and the ?lm conveying means in
provided with a pin l8 which is engaged by a
m order to make overlapping dissolving pictures or
bolt l9 which tips the carrier upwards to the left
fade-ins and fade-outs as they are sometimes on the pivot l4 and whereby the gear i2 is kept
called. One object of the invention is to provide in mesh ‘with the pinion l0.) When the bolt I9
means for automatically closing the shutter, re
is withdrawn slightly to the right, the carrier
versing the ?lm while the shutter is closed and
l3 tips slightly downwardly to the right. The
again
opening
the
shutter
and
start
the
?lm
in
10
gear I2 is then moved away from the pinion Ill
its normal operation whereby the entire opera
and the latter‘ is engaged by the gear H as is
tion of taking overlapping pictures may be car
obvious. The rotation of the ?lm moving gears
ried out wholly automatically and without re
8 and 8 is then reversed.
quiring any special attention except a momen
Referring now to Figure 2, the shutter 3-4 is
tary operation of a suitable coupling member for closed and opened in the usual manner by a pin
coupling the shutter mechanism to the ?lm oper
20 which slides in a slot 2! in the wall 22 which
ating mechanism. This mechanism is usable in separates the ?lm chamber from the operating
connection with motor driven ?lm operating mechanisms. The pin 20 is carried by an arm
means. Another object of the invention is to in
23 which is pivotally connected to a link 24. The
20 clude in the above mechanism suitable means, latter is in turn pivotally connected to the upper
operable from the same coupling member, where
end of a lever 25 which has a pivot 26. The pivot
by the »shutter may be automatically closed and may be adjusted in a ?xed slot 21 and in a slot
opened also in cameras in which the ?lm is man
28 in the lever. The lower end of the lever 25
ually operated. Another object of the invention is adapted to be engaged by a pin 29 on a slide
is to provide means for varying the closed period 30 which‘ carries a second pin 3|. The latter is
of the shutter to control the length of the ?lm engaged in a fork formed by the lower’ end of a
which is to be used for overlapping pictures.
lever 32 and a spring 33 ?xed to said lever. The
With the foregoing and other objects in view, latter is pivoted at 34 and connected at its upper
the invention is embodied in a camera mecha
end to a link 35 pivoted to a crank disk 35.
30 nism arranged and constructed as hereinafter
When the parts are in the position shown in
set forth, and as illustrated in the accompanying Figure 2, the shutter 3-4 is operated in the usual
drawings in which
manner. When the crank disk is rotated 180°
Fig. 1 is a side view illustrating the ?lm oper
from the position shown, the shutter is closed
ating means and the coupling member‘ for re
through the operation 01' the levers and links
versing the same while the shutter is closed, and just described and as will be explained later on.
35
also shows parts of the shutter operating mecha
In accordance with the invention there is pro
vided a coupling member which, when thrown in
Fig. 2 is a side view of the shutter operating by the operator, automatically causes a reversal
members.
'
of the ?lm operating gears, closes the shutter,
v40 -‘Fig. 3 is a partial sectional view on line 3-3 of reverses the ?lm, again opens the shutter and
Figure 1.
again operates the gears to drive the ?lm forward.
Fig. 4 is a detail view of parts shown in Fig. 3._
The coupling member is in the form of a forked
The camera is designated by the reference nu
member pivoted at 4!) and having two branches
meral I. 2 is the ?lm and 3, 4 the shutter. The 4|, 4|, see Figures/1, 3, and 4. Fixed springs 48
?lm is driven past the shutter by a, train of gears
45 including a middle gear 5 which drives gears 6 tend to keep the‘iork 4| in normal inoperative
neutral position between the gears 6 and ‘l. The
and ‘I. These in turn drive gears 8 and 8 which free ends of the fork members 4| support a shaft
move the ?lm in the usual manner. The gear. 5 42, see Figure 3. Upon the latter is mounted,
carries a pinion III which is driven from either between the fork members, a coupling pinion 43
50 of the gears II and I2 mounted upon a movable rigidly connected to a disk 44. The latter carries
“ carrier l3 pivoted at l4. The gears II and i2 a diagonally disposed spring 45 adapted to en
are in constant mesh. The gear II is driven gage in slots 46 in a second disk 41 which in turn
from a gear l5 which carries a small pinion it. rotates with the crank disk 35. The disk 44 has
The latter is driven from a spring motor II in two ?ngers 48 and 58. Either of these ?ngers is
the usual manner.
‘
-
2,117,094
adapted to engage an arm 5| for shifting the bolt
i9 to tip the gear carrier ii. The coupling mem
ber 4| is adapted to be moved into two different
actuating positions in which the coupling pinion
43 may engage either the lower or the upper
gear 1 and 5 as will be explained. In either of
its two actuating positions the fork will be held
by a yoke 52 adapted to engage either of the .two
10
?xed pins 53 and 54.
The operation is as follows:-Assuming that
the ?lm is motor driven from the spring motor
l1. When it is desired to take overlapping pic
tures, the operator depresses the fork 4| and
rotated for 180° in clockwise direction until the
?nger 49 engages the pin ill as an indication to
the operator to cease reversing the ?lm and com
mence to advance it. Thus shaft 42 is again
rotated anticlockwise and the crank disc is
brought back into normal position as in Figure 1
and the shutter is opened. At the end of the
movement the yoke 52 is disengaged from pin 55
by the nose 55 on the disk 41.
The operations may be summarized as fol l0
lowsz-If the ?lm is motor driven, the coupling .
member 4| is moved down. If the mm is manu
ally driven, the coupling member is moved up.
In both cases, the coupling shaft 42 is operated to
ter mechanism is coupled. The fork 4| is then actuate the shutter actuating members shown in 15
Figure 2 to close and thereafter open the shutter.
locked in depressed position by the yoke 52 en
gaging the pin 54. When the fork is depressed, If the ?lm is motor driven, the gearing is auto
the large gear 1 engages the coupling pinion 45 matically reversed while the shutter is closed
20 and rotates it anticlockwise. Consequently the and at the end of the overlapping movement
crank disk 36 is rotated anticlockwise to actuate the ?lm is again advanced, the entire operation 20
the lever 32, see Figure 2, to move the slide 30 being automatic. If the ?lm is manually driven,
leftward. The pin 29 then moves the other lever the coupling member operates to indicate when
25 which in turn operates the link 24 to throw the ?lm is to be reversed and at the end of the
25 the lever 23. Thus pin 20 is operated to close the overlapping movement it also indicates that the
?lm is again to be advanced.
25
shutter. The disk 44 moves with the coupling
The mechanism illustrated in Figure 2 includes
pinion 43 and when the shaft 42 has been rotated
a hand operated arm 62 for closing and opening
180° anticlockwise, the ?nger 49 engages arm 5| the shutter by hand. The arm 62 has a pin and
to withdraw the bolt I! from the pin it. Thus slot
connection ‘II with a disk 12 which is oper
30 the gear carrier | 3 tips rightwardly, the gear I2
ated by the operator.
is disengaged from the pinion | 0 and the latter
The length of the ?lm upon which the overlap
is engaged by the gear II as is obvious. Hence
ping
pictures are to be taken is determined by
the train of gears is reversed and the ?lm runs
the
operations
of the two ?ngers 49 and 50 which
reversed with closed shutter.
accomplish the gear reversing movements and
35
Inasmuch as all the gears are reversed, the determine the period of time during which the
coupling pinion 43 is also reversed and therefore
at the end of the said ?rst rotation of 180° this shutter is closed. However, the lever mechanism
which is actuated from the crank disk 36 includes
pinion now commences to rotate clockwise and means
for varying the closed period of the shut
the spring 45 by reason of its bevelled ends, see ter, hence the length of ?lm which is used for
Figure 4, is turned out of engagement with the
the overlapping pictures. If the pivot 26 is moved 40
disk 41. The latter and the crank disk 36 there
fore remain stationary and the shutter remains into another position, for instance moved to the
closed while the ?lm is reversed. However, as bottom of the slot 21, the lever 25 will be thrown
soon as the pinion 43 has completed the said to the left away from the pin 29. When now the
coupling fork 40 is operated, a certain length of
second 180° movement this time in clockwise di
rection, the other ?nger 50 on the disk 44 engages ?lm runs without the shutter being closed because 45
the arm 5| and the bolt I9 is moved to the left the shutter closing lever 25 will not be engaged
in under the pin l8. The gear carrier is now immediately by the slide pin 29. That is the
tipped upwardly to the left so that the gear l2 pin 29 and slide 30 will move idly a short distance
again engages the pinion l0 ‘and the train of to the left in Figure 2. when pin 29 reaches lever
gears are now again driven forwardly to advance 25 the latter will be moved to close the shutter.
the ?lm. Consequently the coupling pinion 45 This happens before the crank disk has completed
is now again rotated in anticlockwise direction its 180° anticlockwise movement. Consequently
and as it commences this movement, the spring the lever 32'will continue to be moved by the
55 45 engages the disk 41 and moves the latter and crank 55 after the slide 30 has completed its left
the- crank disk 35 anticlockwise back into the ward movement. The continuing idle movement -65
of the lever 32 is made possible by the spring 33
starting position shown in Figure 1 and the shut
ter is opened. At the end of this movement, which gives and slides around the pin 3| as will
which is 180°, a nose 55 on the disk 41 engages be understood. When the reverse movement of
the yoke 52 to release the latter from the pin 54 the ?lm has been accomplished, the coupling
whereupon the coupling member 4| is moved back fork is automatically moved up. The gearing
now advances and the lever 92 begins at once to
into neutral inoperative position and the opera
tion is ?nished.
travel to the right but does not immediately cause
If the ?lm is manually driven or operated, then the return movement of the slide 30 until the
65 the operation of taking overlapping pictures is latter has moved idly ‘as far back to the right as
as followsz-The operator raises the coupling it was moved idly to the left at the beginning of
member 4| which then is locked in‘ its upper the movement. The spring 33 again acts to take
operative position by engagement between‘ the up or compensate for the difference in movements
yoke 52 and the pin 53. Thus coupling pinion between the slide pin 3| and the lower end of the
70 43 engages the gear 5 and the shaft 42 is again lever 32.
.
operated anticlockwise to close the shutter 3-4.
It follows that the mechanism for causing re 70
After a movement of 180", the ?nger 50 engages versal of the ?lm always works upon the same
a pin 50 which serves as a notice to the opera
length of ?lm, but that within this length the
tor to reverse the ?lm by moving the operating length of the overlapping operation itself may be
75 handle ‘I9 backwards. The shaft 42 is now again varied by adjusting the pin 26.
'
.
thereby throws in the coupling members whereby
15 the operation of the train of gears and the shut
155
3
9, 1 17,694
I claim:
1. In a motion picture ?lm camera an appa
ratus for producing overlapping exposures com
prising in combination a shutter, operating means
to open and close the shutter, ?lm advancing
means, a device for reversing the ?lm advancing
means, a normally inactive coupling mechanism
for automatically and sequentially operatively
the shutter is opened and means indicating to
the operator the beginning and the end 01' the
reverse movement of the ?lm.
5. In a motion picture ?lm camera, an appa-‘v
ratus for producing overlapping exposures com
prising in combination ?lm advancing means; a
device for reversing the movement of said ad
vancing means, a shutter, operating means to
connecting the shutter operating means with the
?lm advancing means to close and open the shut
ter and for connecting the said reversing device
open and close the same, a mechanism for oper
atively connecting the shutter operating means
to the ?lm advancing means to close the shutter
and for operatively connecting the said reversins
with the ?lm advancing means to reverse the > device to the said advancing means to reverse
?lm while the shutter is closed, and advance the the ?lm while the shutter is closed and means in
?lm when the shutter is again opened, a manually said shutter operating means‘ for varying the 15
operated member for moving said coupling mech
lenth of ?lm operated‘ upon during the said re
anism into operative position and a member in
movement.
said coupling mechanism and actuated by the verse
6. In a motion picture ?lm camera an appa
said ?lm advancing means for automatically ratus for producing overlapping exposures in
moving said coupling mechanism into inoperative
position.
'
'
_
2. In a motion picture ?lm camera van appa
ratus for producing overlapping exposures com
prising in combination a shutter and means to
open and close ‘the same, ?lm driving gears, a
coupling mechanism for automatically connect
ing the ?lm driving gears with the shutter clos
ing means to close the shutter, means for oper
ating said driving gears to reverse the ?lm while
the shutter is closed and for operating said gears
to advance the ?lm when the shutter is opened
‘ and means indicating the beginning and the end
of the reverse movement of the ?lm. _
3. In a motion picture ?lm camera an appa
ratus for producing overlapping exposures com
prising in combination ?lm advancing gears, a
shutter and means to open and close the same, a
gear reversing device, a coupling‘ mechanism for
actuating said shutter operating means and gear
reversing device whereby ?rst to close the shut
40 ter, then to connect the reversing device with
the ?lm advancing gears to reverse the ?lm while
the shutter is closed and thereafter to restore the
I advancing gears to normal operation and actu
shutter operating means to open the
shutter, means for maintaining said coupling
mechanism in normally inactive position, manu
ally operated means 101' putting‘ said coupling
in operation, means for locking said
mechanism in operative position and means in
cluded in said coupling mechanism for automati
' ate the
_ cally releasing it irom the said locking means.
‘4. In a motion picture ?lm camera an appa
ratus for producing overlapping exposures com‘
prlsing in combination a shutter and means to
open and close the same, ?lm advancing gears,
a coupling mechanism for‘ automatically con
necting the ?lm advancing gears to the shutter
operating means to close the shutter, an operating
handle for reversing the said advancing gears to
reversethe?lmwhiletheshutterisclosedand
ioroperatingsaidgearstoadvancethe?lmwhen
cluding a shutter, means to open and close the 20
shutter, a plurality of intermeshing gears in
cluding a reversing gear for moving the'?lm with
relation to the shutter, a gravity actuated gear
carrier supporting said reversing gear, an abut
ment engaging the gear carrier to support the‘ 25
reversing gear in non-reversing position while
the ?lm is being advanced, an abutment operat
ing member for disengaging the abutment from
the gear carrier to cause the latter to move by
gravity to place the reversing gear in position to
reverse the movement of the ?lm whereby to
produce overlapping exposures, means for actu
ating said abutment operating member, springs
normally holding said operating means inactive I
and a manually operated member for moving the
said operating means into operative engagement
with the said abutment operating member.
‘ _
7. In a motion picture ?lm camera an appa
ratus tor producing overlapping exposures includ
ing a shutter, gears for normally advancing the
?lm with relation to the shutter, means for re
versing the movement 0! said gears to reverse
the advancing movement of the ?lm, intercon
nected levers for closing the shutter while the
?lm is reversed, a coupling mechanism (or oper
ating said levers, said mechanism including a
couplingshai't,adiskonsaidshaiteonnected
to the said levers to operate the same, a pinion
on said shalt todrlve the same to actuate said
disk, means normally holding said
in
active and a manually operated member for mov
ing saidmechanismtopositionthesaidcoimling
gear in operative driving connection with the
aforesaid gears to rotate the coupling shai’t.
8.A device according to claim 7 including
means ior adjusting the operations 0! the inter
connected levers to delay the closing oi.’ the shut
ter after thesaid coupling mechanism)!” been
moved into position to operatively connect the
levers operating disk to the gears.
HIIIUT mm.
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