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Patented Nov. 12, 1946
2,410,925
UNITED STATES PATENT OFFICE
CAMERA OPERATING CONTROL
George T. Burrell, deceased, late of Huntington
Station, N. Y., by Helen Haughton Burreli,
administratrix, Huntington Station, N. Y., as
signor to Republic Aviation Corporation, a cor
poration of Delaware
Application July 26, 1943, Serial No. 496,103
6 Claims.
This invention relates to improvements in pho
tographic apparatus, and/more particularly to a
(01. 88—16)
2
of standard construction, and having release
mechanism (not shown) of a conventional type
for exposing the film. The operating action of
this mechanism is controlled by a release member
graphic ?lm.
in the form of a stud 25, the arrangement being
Thisapplication is a continuation in part of
such that upon each downward movement of the
the application of George T. Burrell, filed July
stud, one frame of the ?lm is'exposed.
12, 1941, Serial No. 402,069, and which matured
The usual main spring (not shown) is rewound'
into Patent No. 2,378,182 on June 12, 1945. '
by clockwise rotary movement of a crank it.
'The original application, of which this is a 10 This crank is provided with a slot 25av which
continuation in part, contemplates an apparatus
receives the stud 25. Upon clockwise rotary
that periodically and continuously photographs
movement of crank iii, the upper edge and end
a ?ight test instrument panel during a test ?ight
of slot 25a engages stud 25, to push it down and
without any intervention on the part of the pilot
accordingly effect release and exposure of one
of the aircraft beyond initially starting the oper 15 frame of the ?lm. Return movement of crank
ation of the apparatus. Such apparatus includes
IS in the counter-clockwise direction permits
a constantly effective source of power, and the
stud 25 to return to its initial position, where it
present invention has in 'view an operating con
again becomes effective, when pushed down as
trol that will utilize the power of said constantly
before, to release the next or succeeding frame
effective source to cause a periodic and successive 20 of the ?lm.
exposure of the'frames of a photographic film in
A rotary oscillatory movement may be im
the camera forming a part of the apparatus of
parted to crank l9 by any suitable means. As
the aforesaid parent application.
shown in the drawing, such means may comprise
Photographic apparatus to which the improve
a triangular plate 23 pivoted at 24. This plate
camera operating control mechanism for succes
sively exposing the individual frames of a photo
' ments of this invention relate usually comprise
a main spring which furnishes the power to drive
_ is caused to periodically oscillate upon and from
the continuous operation of an electric motor 20
the ?lm-release mechanism, and'a lever or other
having a driving connection therewith through
suitable means for e?'ecting exposure, of the film,
a slotted connecting rod 22 and an eccentric 2i.
one frame at a time. Heretofore, it has been
It is contemplated by the invention that any
necessary to rewind the main spring manually 30 required play may be provided for by using a
~ > after the roll of film, or a substantial part thereof,
universal or swivel Joint to connect the rod 22
has been exposed, in order to prepare the camera
with eccentric 2|, and by having a su?lcient
for exposing the next roll of ?lm.
amount of play about the pin 28, ?xed in plate
One of the objects of the invention is to pro- '
23, with respect to the edges of the slot 21 in rod
vide photographic apparatus wherein the main 35 22. The throw of eccentric 2i is greater than
spring will be rewound automatically as it func
the length of slot 21 by an amount su?lcient to
tions to operate or drive the ?lm-release mecha- '
make the driving connection through rod 22
nism, and at a rate, or in an amount, substan
effective. For example, in the other extreme
tially sufficient to restore to the spring the energy
position of eccentric 2 I, that is, one hundred and
40
expended in releasing the film, so that the camera
eighty degrees from the position shown in Fig. 2,
will be in the same condition, in this respect, at
the lower end of slot 21 will be in engagement
the end of the “run” as it was at the beginning.
with the pin 28, and plate 23 will be raised, crank
Other objects and advantages will hereinafter
I8 will be in its extreme position in the counter
appear.
‘
clockwise
direction, and the stud 25 will be in its
For the purpose of illustrating the invention, 45 upper, initial position ready to effect release of
an embodiment thereof is shown in the drawing,
the next frame. A pin 28, fixed in plate 23, has
wherein
a sliding fit in a slot 29 with which crank I9 is
Figure 1 is a front elevation, looking toward
provided. By such means, the crank 19 is caused
the left in Figure 2; and
>
to oscillate upon and from oscillatory movement
Figure 2 is a side elevation, looking toward the 50 of plate 23.
right in Figure 1 illustrating the positions occu
With the parts in the positions just described,
pied by the parts of the instant invention after
1. e. disposed at the opposite ends of the respec
a single exposure by the camera.
'
tive paths of movement to the positions illus
The reference numeral l1 designates, generally,
trated in Fig. 2, the continued movement of the
~ a moving-picture or other. suitable type of camera 65 eccentric It will cause the rod 22 to move down
:51
m
e
3. The combination with a spring driven mo
tion picture camera having a main spring, a
single frame release mechanism and a projecting
wardly on the pin 26 until the latter contacts the
upper end of the slot 2i. Whereupon a pull is ex
erted by the rod on the pin 26 which swings the
reciprocable stud for the operation of the release
mechanism, of an oscillatory crank for rewinding
the main spring by its movement in one direction
plate 23 about its pivot 26 thereby moving the
crank; ill in a clock-wise direction which move
ment causes the stud
to be moved downwardly
exposing one frame of the ?lm in the camera H.
and haivng means engaging the stud for control
ling the reciprocable movement thereof simulta
neously with the movement of the crank in either
direction, a constantly rotating motor, a disc op
erating in unison with said motor, an operating
rod eccentrically connected to said disc, and an
intermediate oscillating member connected to the
extremity of the operating rod and to the crank
The motor. 283 operates continuously and for every
complete revolution thereof one frame of the film
is exposed as above described. Manifestly there-:
fore the tempo of the ?lm exposure can he accu
rately controlled by regulating the speed of the
motor Ell. From the foregoing, it will be seen
that the crank is, which is common with respect
for imparting a full oscillation to the crank upon
to the single-frame release stud 25 and the main
each revolution of the disc and motor aforesaid.
spring of the camera, is caused to oscillate at a
i. The combination with a spring driven. mo~
rate equal to the rate or" rotation of motor fill.
tion picture camera having a main spring and a
For example, if the adjustment is such that motor
single frame release mechanism, of a stud proEli rotates at the rate of sixty revolutions a min
ate, the stud 25 will be pushed down to release 20 truding from the camera and reciproca’ole to con
trol said release mechanism, an oscillatory crank
and effect exposure oi'the ?lm at the rate or“ one
for rewinding the main spring or" the camera hav
frame every second.
ing means of cooperation with the
afore
‘it will be understood that various changes,
said, whereby the movement of the crank in one
such as in the size, shape
arrangement of
direction to rewind the spring positively moves
the parts, may be made Without departing from
the spirit of this invention or the scone oi the
claims.
the stud to expose a single ‘frame and the move
ment of the cran... in the opposite direction allows
.
Having thus disclosed
the stud to return to its original position, a com
inventive concepts
and one mode realizing the same, what is
as new and inventive is:
'
stantiy rotating motor, a disls rotating in unison
»
. I...
‘
motor.‘ a pivotally mounted plate,
pivotal connect‘"on between said plate and th 0)
‘l. The combination with a s1
extre him of said crank. and a connection be»
tween t e disc aforesaid and the plate whereby
rotation of the disc causes
oscillation c
th
VA
i oinatlon with a camera having a
triangular plate pivot‘
vertices,
' gle frame .
stud. mova?e to control said release mechanism
min and slot connec' ‘c
to expose a single
other vertex. of
plate
th
said crank, an operating rod, 9
nection between one extre
of a crank pivoted to
the
stud
crank
camera
for
oscillates
controlling
and on
having‘
itsthe
pivot,
aoperation
slot
andcoacting
means
thereof
for
with
as
oscil~
'
rod and. the third vertex or the
rotating motor, a disc on the
lating the cranir on its pivot comprising
mounted
and an eccentric connection ‘
extremity oi said rod. or
'
plate
osc -lation on a fixed pivot and con“
nected to the extremity of the crank, a consta'"
rotating him-oi",
an O108"Ei3lllg rod eccei‘
cally pivoted to the shaft oi‘ the motor at one of
rotation oi’ the latter:
about its pivot in
crank. in a clockwise
its ends and to the plate at the other of its ends.
59
mainspring of the camera a;
aforesaid stud to trip the rel
e
the continued rotation
disc through
.
remaining 189° oi’
cc “1331
revolution. thereof
swings the plate about its pivot in the reverse
direction to move the crank. countenclocltwzse
and restore the stud to its initial position.
2. The combination with a spring driven mo
tion picture camera having a main spring, a sin
gle frame release mechanism and a projecting
stud ‘for the operation of the latter, of
oscilla
' tory crank connected to the main spring
having means engaging the stud for the -_ ltan
neous rewinding oi the main spring
opera
tion of the stud upon the clockwise movement of
the crank, a constantly rotating power source, an
eccentric rotating in unison with said power
source,
said crank
and for
a linkage
imparting
between.
one said
complete
eccentric
oscilla
tion to the latter upon each revolution of the ‘ill
former.
singleThe
frame
combination
release mechanism
with
and a protruding
having
stud reciprocable to control said release me
nism to expose a single frame, of a cranl; mount
ed for» oscillation on the camera and having a
slot engaging the stud to control the movement
thereof in both directions as the crank oscillates,
and
for oscillating the crank comprising
a triangular plate mounted for oscillation‘ on a
?xed pivot at one of its vertices and having a join
and slot connection with the extremity
i
crank at another of its vertices, a constantly‘
rotating motor, and an operating arm eccentriu
cally pivoted
the shaft of the motor, at one
of its ends and
a pin and slot connection
at the other of its ends to the remaining vertex
of
plate.
EI-IELE'I‘I ‘i-IAUGHTON BURRELL,
zlclmz'nistratria: of the Estate of George T. Bur/‘ell,
Deceased.
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