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Патент USA US2124883

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' July 26, 1938.
2,124,883
L. R. MARTIN ‘
INDICATING‘ SYSTEM FOR MOTION PICTURE _APPARATUS
Filed June 11, 1935
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INVENTOR
Lawrence R. Martin
BY' . mém/
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ATTORNEY
Patented July 26, 1938 I
2,124,883
UNITED STATES PATENT OFFICE
2,124,883
INDICATING SYSTEM FOR MOTION PICTURE
APPARATUS
Lawrence R. Martin, Rochester, N. Y., assig-nor,
by mesne assignments, to Eastman Kodak
Company, Jersey City,. N. J., a corporation of
New Jersey
Application June 11-, 1935, Serial No. 26,019
9Claims. (Cl. 33-172)
The present invention relates to an indicating vided with an embossing and which carries an
system for a motion picture apparatus and more indicating member within said embossing. A
particularly to an indicating system which facil
itates dark room loading of the apparatus.
The present invention will be described with
respect to a motion picture ?rm magazine but is
projection on the indicating member is normally
moved into engagement with the outer convolu
tion of a ?lm roll in the magazine casing and a
?nger-piece is connected to the indicating mem
also adapted for use on motion picture cameras,
projectors, etc.
ber and is available from the exterior of the
'
One main object in the design of a ?lm maga
10 zine is to produce a- very compact magazine.
Placing the indicating means in an embossing -
or forming in the cover of the magazine casing
contributes to compact design of the ?lm maga
zine. However, the indicating means includes a
magazine. The ?nger-piece permits movement
of the indicating member throughout its range
or permits holding the indicating member in
10
.v
any predetermined position. A masking mem
ber partially encloses the indicating member
within said forming, has a groove for co-oper
ating with the beaded margin of the indicating
projection for engaging the outer'convolution member
to perform a_ light-sealing function and
of the ?lm roll and is preferably spring pressed‘ also
has
portions abutting the projecting mem
so that said projection strikes against said outer
ber to limit the movement thereof. "
.
convolution. The normal position of the indi
Reference is hereby made to the accompanying
cating means and its projection complicates as
drawing wherein similar reference characters 20
20 sembly of the ?lm magazine because the pro
designate similar elements and wherein:
15
jection may be over the side or edge of the film
roll and mutilate the same after the cover is
forced onto the casing. Furthermore, this as
sembly of the magazine must be accomplished
25 in a dark room to prevent fogging the light
sensitive material of the ?lm roll. .
The primary object of the present invention
is the provision ‘of an indicating system that
can be located so that the projection will not
30 mutilate the ?lm roll and includes a ?nger-piece
for holding the indicating means and its pro
jection in such location for easy ?tting of the
magazine cover.
}
A further object of the invention is the pro
35 vision of an indicating system which permits as
sembly of a ?lm magazine solely by using the
sense of touch of the operator so that the as
sembly can be readily accomplished in a dark
room.
Fig. 1 vis a ?lm magazine provided with an- ‘
indicating-system according to the present in- .
vention and with part of the cover broken away '
for better illustration of the internal parts.
Fig. 2 is a transverse cross-section through .25
said ?lm magazine taken on the line 2-2 of
Fig. 1.
'
-
Fig. 3 is a fragmentary cross-section through
‘the embossing and indicating means taken on 30
line 3-3 of Fig. 1.
Fig. 4 is a section through the forming in the
magazine cover and is taken on the line 4-,! of
Fig. 3.
.
The ?lm magazine which provides the setting 35
or background for the present invention will
?rst be described. The particular characteris
tics of the ?lm magazine are immaterial. but
' may be of the type which comprises a casing HI ,
,
having lateral walls ll. Oilset portions I! are 40
A further object of the invention is the pro
vision in an indicating ‘system of co-operating provided along the margins of lateral wall H. ‘
A cover l3 has a rim H for engaging the offset
grooves and a beaded margin to form light-seal
ing joints for the magazine container and con-5 portion 12 along the outer margin of lateral
tributing to the manual control of the movable wall ll. When the cover I3 is?tted into casingi
45 member in the indicating means.
l0 a light-tight container for a ?lm supply is 45
>
v.
Still another object of the invention is the provided.
provision of a masking member which, in addi
The front lateral wall ll of the casing “I may
tion to assisting in the manual location of the ‘be provided with an . exposure aperture, not
indicating means, also acts to limit the move-» shown, and a presser pad 15 supports the ?lm F
50 ment of the indicating member in such an indi
opposite the exposure aperture, being resiliently
cating means. Other and further objects of the held against ?lm F by a spring 16 which is sup
invention willbe su gested to those skilled in ported by a pair of posts II. A ?exible shutter
the art by the descr ption which follows.
I8 is slidably mounted along lateral ,wall It and
The above and other objects of the invention may be operated by a pin I9 to a closed position
40
55 are embodied in a magazine cover which is pro
to cover said exposure aperture or may be moved
as
2
to an open position to uncover said exposure
aperture.
>
The ?lm magazine contains a pair of rotata
bly mounted ?lm rolls. The supply ?lm roll
As the diameter of ?lm roll 20 decreases, the
projection 35 moves in a counter-clockwise di
rection, see Figs. 1 or 4, and the graduations
also move in a counter-clockwise direction past
20 is coiled upon a core ‘2| which is adapted to
pointer 38.
be rotatably supported upon a supply spindle 22
on the casing III of the magazine. A ?lm
the indicating means must have a range of
sprocket 23 is rotated by a shaft 24 to conduct
As a result,’ the ‘projection 35 of
movement into space previously occupied by con
volutions of the film roll 20. If the indicating
the film in a preformed loop from supply roll 20
to the take-up roll 25. The ?lm loop is dis
means is in a position for indicating an amount
closed as of the type which encircles one of the
?lm rolls and requires a double layer of ?lm
over one side of sprocket 23. This double layer
of ?lm is guided by a pair of guide rolls 23 and
15 by a spindle 21. The take-up roll 25 is wound
?lm roll, then projection 35 will abut against the
upon a core 28 which is connected to the take
up spindle 23. This particular type of ?lm path
also contributes to compact design of the ?lm
magazine but the present invention is not
20 limited to any speci?c ?lm path, the invention
being quite independent of the intermittent
movement of the ?lm through the ?lm loop.
The cover I3 is fastened-securely in place
upon the casing ill by means of a pair of bolts
25 30 which pass through the cover l3 and are
threaded into the ends of spindles 22 and 29.
According to the illustrated or any other'con
ventional form of ?lm movement, the supply
?lm roll decreases in diameter upon operation
30 of the apparatus while the take-up ?lm roll has
a corresponding increase in diameter. It is cus
tomary to measure the amount of ?lm that has
been moved or remains in the apparatusby an
indicating means which makes contact with the
35 outer'convolution of one of said ?lm rolls; The
indicating means of the invention is described
as engaging the supply ?lm roll but footage indi
cations may be taken from either roll. The
‘cover i3 is provided with an embossing or form
40 ing 3|. Such embossing 3| may have any suit
able formation but is here disclosed as being
of ?lm less than that actually in the supply 10
side of ?lm roll 20 and prevent location of the
cover l3 on casing i0 or else cause mutilation of
the ?lm opposite projection 35 upon- forcing the
cover l3 into the casing Ill. Since the interior
of the magazine is not readily available when
the cover I3 is being ?tted into casing l0, it is
di?icult to set the‘ indicating means so that there
will be no interference between projection 35 and
the edges of ?lm roll 20.
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20
To overcome the di?lculty- just indicated, a
?nger piece is provided for permitting move
ment of the- indicating means throughout its
range and for holding the indicating means in
any predetermined position. Such a ?nger piece 25
is connected to the indicating member 33 and is
available from the exterior of the ?lm maga
zine. ‘The ?nger piece 45 is integral with or
attached to the support 40 and is ?at to lie
compactly‘ alongthe cover |3_. Obviously, the
support 40 and ?nger piece 46 may be supplied
30
in practice as an integral headed stud.
Although the friction between the operator's
?nger and the ?at surface of ?nger piece 45 is
generally su?icient to hold the indicating means '
in any desired position, a masking member is_
provided which assists in this holding of the
indicating means and. at the same time per
forms other functions to be more particularly
described hereinafter. ‘The masking member 41 40
is located in a shallow offset 43 in cover i3 and
is fastened to cover |3 by a pair of rivets 49 and
An indicating means is movably mounted. a pin 50. When the cover I3 is ?tted on casing
cizrcular and provided with an annular groove
3
.
within embossing 3| and comprises an indicat
45. ing member 33 having a beaded margin 34 and
carrying a projection 35. One surface of indi
cating member 33 is provided with a graduated
scale 35. The forming 3| is provided with an 5
III, the pin 50 is in a position over sprocket 23,
see Fig. i, so as to strip ?lm from’ sprocket 23 or
to prevent the .?lm loop from bulging rear
wardly within the magazine to engage the
supply ?lm roll 20. The masking member 41 is
opening 31 through which the graduations on . recessed to clear projection 35 and has a por
50 scale 35 can be observed.
A pointed 38 may
extend into opening 31 to form an index over
the graduations of scale 35 and a. window 39
tion 5| and a portion 52 for abutting projection
35 in either of two extreme positions. The
masking member 41 is also provided with a
groove 53 which ?ts into the beaded margin 34
of the indicating member 33.
The support 40 is journaled in embossing 3| .
ing means.
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A support 45 is centrally journaled in the ' with sufficient play so that pressure exerted in
embossing 3| and is riveted to the center oi’ an axial direction on ?nger piece 45 will move
indicating member 33. Said support 45 mounts said ?nger piece 45 into frictional engagement
with the outer surface of embossing 3|, and/or
member 33 for movement or rotation within em
move indicating member 33 into frictional en
bossing 3|, with beaded margin 34 withinv an
gagement with masking member 41. and/or
nular groove 32, and with projection ~35 extend
beaded margin 34 into frictional engagement
ing into the casing of the magazine for engage
with the groove 53 in masking‘ member 41. The
ment with the supply ?lm roll 20.
co-operation between beaded margin 34 and
A resilient means normally moves‘ the indicat
ing‘means so that projection 35 is normally in groove 53 insures and increases the frictional
contact with the outer convolution of ?lm supply engagement between their supporting members
may be provided over opening 31 to keep the
dustiand dirt out of the interior of the indicat
55
60
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'
65
roll 23. Such a resilient means may be. com
posed of a spiral spring 4| which has one end
42 fastened to embossing 3| by a rivet 43 and
70 which has the other end 44 anchored in a‘ slot 45
within support 40. With the cover i3 ?tted onto
the casing Hi, the resilient means or spiral spring
4| normally moves the indicating means so that
projection 35 engages the outer convolution of
>
75 ?lm roll 20, see Fig. 1.
so that less pressure on ?nger piece 48 is re
quired to overcome the action of spiral spring
4| and to hold the indicating means in any pre
determined position.
whenv the indicating
means is moved so‘ that projection 35 abuts por
tion 52, and when the cover I3 is ?tted into
casing i0 .projection '35 will be spaced, even
from a full supply ?lm roll 20, so that there will
be no difficulty in ?tting the cover into the cas
grasses
ing and the?lm in roll 20 will not be mutilated.
The assembling operator can move projection 35
into this extreme position and press upon ?nger
piece 46 to hold the indicating means and pro
jection 35 in such a position duringl?tting of the
cover. Furthermore, the operator may grasp'the
.
h
3
the beaded margin of said indicating member;
of a ?nger piece connected to the support for '
said indicating‘ member and available atthe' :
exterior of said cover, said support having sum
cient play so that pressure on said?nger piece U!
promotes a frictional engagement between the
vcover It with two or three'?ngers and may place ‘_ beaded margin of_ said indicating member and
still another "?nger of the same hand against , the groove of said masking member whereby said
?nger piece 46 to hold the indicating means in a indicating member can be manually held in any
10
predetermined position.
3. In a motion picture apparatus, the combina
tion with a ‘casing adapted to contain a ?lm roll,
indicating means to move projection 35 against
the outer convolution of v‘film roll 20 and the
indicating means will be ready to give accurate
footage indications ‘and to follow the ?lm roll 2|
a cover, for enclosing said casing, an embossing
in said cover and provided with an opening, an
as its diameter decreases.
tion on said indicating member for extending into
said casing and for engaging said ?lm roll, and ..
a masking member across said embossing par
Although, groove 53 increases the frictional en
gagement between indicating member 33 and
V
10
?xed position, thus simplifying the handling of
the cover during assembly. "when ?nger piece
4! is released, spiral spring 4| will actupon the
,1]. ,_
indicating member movably mounted within said
embossing and covering said opening, a projece?
masking member 41, it also forms an additional .tially to enclose the same and having portions
light-sealing joint to protect the ?lm within the - ‘for abutting said projection to‘limit the move
magazine from being logged by the light which mentjoi said indicating means between extreme
may enter through the opening 31 in embossing positions, of a ?nger piece connected to said in
3|. Thus masking member 411 performs three dicating member, available from the exterior of
25 principal functions, one to assist in holding thev the cover in closed position thereof, and arranged
indicating means in any desired position, another so that movement of said ?nger piece moves said
to provide additional light-sealing, over the indi- , indicating member to extremeland' intermediate
positions and so that pressure on said ?nger
eating means, and still another to limit the move
ment of projection 35 and to provide a positive piece promotesv frictional engagement between
'20
. '
said indicating member and said masking mem
stop in one extreme position thereof.
30
Allv of the operations necessary to set the indi- ~ ber to permit holding of'said indicating member '
catingmeans and to hold the same in any set. in any predetermined position.
4. In a motionpicture apparatus, the combinaposition as well as to ?t the cover onto the cas
ing can be performed solely by employing the tion with a casing adapted to contain a-?lm roll,
35 sense of touch of the assembling operator. Since I a cover for enclosing said casing, an embossing
all of the operations can be performed by merely in said cover and provided with an opening‘, an‘
feeling the diiIerent parts, the assembling of the indicating member within‘said embossing cover
?lm magazine can be readily accomplished within ing said opening and having a beaded margin,
a projection on said indicating member for ex
.
The indicating system 01‘ thepresent invention ~ tending into said casing and for engaging the
a dark room.
is susceptible of'many variations and modi?ca
tions. Therefore, the scope of the invention is
to be determined by the appended claims.
Having now‘ particularly described my inven
45 tion what I desire to secure by Letters Patent
of the United States and what I claim is:
_
1. In a motion picture apparatus, the combina
tion with a casing adapted to contain a ?lm roll,
a cover for enclosing said casing, and embossing
50 in said cover and provided with an opening, an
indicating member movably mounted withinsaid
embossing and covering said opening, a projec
' tion on said indicating member 'for extending into
periphery of said ?lm roll, a support for movably
mounting said indicating member within said
embossing, and a masking member across said
embossing, having a groove ?tting into the
beaded margin of said indicating member, and 45
having portions for abutting said projection‘to
t the movement of said indicating means be
tween extreme positions, of a ?nger piece con
nected to‘ the support for said indicating mem
ber and available from the exterior of said cover 50
for moving said indicating member to extreme
and mean positions, said supportpermitting pres
sure on said ?nger .pieceto promote frictional.
said casing and for engaging said ?lm roll, and . engagement between the beaded margin on said
55 a masking member across said embossing par- - indicating member and the groove in, said mask 55
tially to enclose thesame, of a ?nger piece con-= ing member for holding'said indicating member I
nected to said indicating member, available from
the exterior of the cover in closed position
thereof, and arranged so that pressure on said
60 ?nger piece promotes ‘frictional engagement be
tween said indieatingmember and said masking
member to permit holding of said indicating
member in any predetermined position.
’
‘
,
2. In a motion picture apparatus, the combina,
tion with a casing adapted to contain a film roll,v
a cover for enclosing said casing, an embossing in
.said cover and provided with an opening, an
indicating member within said embossing cover
ing said opening and‘ having a beaded margin,
70 a projection on'said indicating member ‘for ex
tending into said casing and for engaging the
periphery of. said ?lm roll, a support for mov
ably mounting said indicating member within
said embossing, and a masking member across
75 said embossing and having a groove ?tting into
in' any desired position.
_
5. In a motion picture apparatus, the com
bination with a casing. adapted to contain ‘a ?lm
roll, a cover for enclosing ‘said casing and pro so
vided with an opening, an indicating means
completely enclosed by said casing and cover,_
including an indicating member movably mount
ed on the inner side of said cover and visible
gnly through the opening therein, a projection‘ 65
on said indicating member extending into said
casing, ‘and a resilient means for normally mov
ing said indicating member to bring said pro
jection against the outer convolution of said
?lm roll, of a support journalled in said cover, 70
connected to said indicating member which is on
the inner side of said cover and having a finger.
portion which is external to said cover and which
constitutes the only external manual control of
‘said indicating means. '
75
2,124,888
4 .
6. In a motionpieture apparatus, ‘the com
bination with a casing adapted to contain a ?lm‘
roll, a cover for enclosing said casing and pro '
vided with a window, an indicating member
groove and provided with an opening, and an
indicating means movabiy mounted on the inner
side of said cover within said embossing to cover
completely enclosed by said casing and cover
and including a projection, a support movably
mounting said indicating member on the inner
said opening, having a beaded margin ?tting
said groove to form a light sealing joint,
including a projection extending into said
ing for engaging the outer convolution of
side of said cover for observation only through
?lm roll, of a masking member on the inner
said window and with said projection located
10 for movement into engagement with the outer
convolution of said ?lm roll, and a resilient
means for normally moving said projection of
the indicating member into said engagement
with the outer convolution of said ?lm roll, of
into
and
cas
said
side of said cover for housing said indicating
means within said embossing, provided with a 10
groove ?tting into the beaded margin of said
indicating means to form another light sealing .
joint, and having portions for abutting said pro
jection to limit the movement of said indicating
a ?nger piece available from the outer side of
said cover but connected to said indicating
member on the inner side thereof and consti
tuting the sole manual control for the indicating
means.
member and the projection thereof.
cover having an annular groove and provided
with a window, a circular indicating member 20
having a beaded margin, and including a pro
jection on said indicating member for extending
.
'7. In a‘motion picture‘ apparatus, the com
I bination with a casing adapted to contain a ?lm
roll, a cover for enclosing said casing, an em
bossing in said cover encircled by a deep groove
and provided with an opening, and an indicating
means movably mounted on the inner side 0!
said cover within said embossing to cover said
opening and having a beaded margin ?tting into
said groove to form a light sealing joint, of a
masking member on the inner side of said cover
for encasing said indicating means within said
embossing and provided with a groove ?tting
into the beaded margin of said indicating means
to form another light sealing joint.
,
8. In a motion picture apparatus, the com
bination with a casing adapted to contain a
?lm roll, a cover for enclosing said casing, an
embossing in said cover encircled by a deep
15
9. In a ?lm magazine,.the combination with
a casing adapted to contain a ?lm roll, a cover
for enclosing said casing, an embossing in said
into said casing and for engaging said ?lm roll,
a stud journalled in said forming and connected
to said indicating member to support the same 25
within said embossing and with said beaded
margin within said annular groove, and av spiral
spring between said indicating member and said
embossing, having one end connected to said
forming and the other end connected to said 30
stud and for moving the projection on said in
dicating member intoengagement with the pe
riphery of said ?lm roll, of aI ?nger piece dis
posed outside of the cover of said magazine and
connected to said stud for manual control and 35
movement of said indicating member.
LAWRENCE R. MARTIN.
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