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Sept. 17, 1946.
v. E. F’RATT
‘ Original Filed Jan. 3, 1942
Fla.‘ 4
. 4 ‘Sheets-Sheet 1
Sept. 17, 1946.
v, E, FEAT-f ‘
Original Filed Jan. 3, 1942
4 Sheets-Sheet 2
Sept. 17,1946.
OriginaFFiled Jan. 5, 1942
4 Sheets-Sheet 3
I70 .
115% +814,
Sept. 17, 19.46.
V, E,_ PRATT _
Original Filed
3, 1942
4 Sheets-Sheet 4
Patented Sept. 17, 1946
Verneur E. Pratt, Norwalk, Conn, assignor to l '
crostat Corporation, a corporation of Delaware
Original application January 3, 1942, Serial No.
425,528. Divided and this application July 1,
1943, Serial No. 493,034
3 Claims.
(01. 88-—28)
The present invention pertains to improve-
_ Figiire 19 is an enlarged detail rear View of the
ments in photographic and reproducing apparatug“
An object of the invention is to provide im-
indexmg clutch mechanism in engaged 01' driving
Figure llisaside View Of the Same;
prQVed means for recQI-ding drawings, maps’ (10cm 3,
Figure 12 is a rear View of the same in released
ments and the like on photographic ?lm, such
01' lndexed Position‘;
as micro?lm
Figure 13 is a diagrammatic illustration of the
Another object is to provide improved appara- ' ?lm reels and take-11D drive;
tus of the above nature including means to reproFigure 14 is a plan View of the shutter;
‘duce the photographed drawings, etc., by direct m
A further object is to provide an improved‘
can gya~ppQjgCtOr adapted to photograph data as
noted and to reproduce the same through the
same lens with identical setting, whereby any pos- 15
sible aberration in recording ‘is automatically cor-,
rected in reproduction.
Another object is to provide a camera~projector
of the above type having improved means to index, register andexpose the ?lm.
Figure 15 is a detail Side View Of the’ Same,
showing the driving gears; and
Figure 16 is a Wiring diagram of the various
electrical apparatus embodied in the invention.
ThiSI application is a diViSiOYl of application,
serial N0. 425,528, filed January 3, 1942, now
Patent N0. 2,369,247, dated Dec. 13, 1945.
Referring to Figure 1, the camera-projector 542
has a main base or bed plate 43- A stepped ver
tical sleeve M3 is secured in the front end of the
base 63 and has rotatably mounted therein, a sec
Another object is to provide a suitable object
nd sleeve 45 on the lower end of which is secured
table platen and improved means to support the
a Worm-gear ring 46. A cylindrical lens barrel
same and the camera in rigid mutual relationii‘? is threaded at 48 in
side 49theengaging
second asleeve
ship, whereby possible vibrational ?exings beand has a longitudinal slot
tween them are substantially eliminated and if '35 key 50 in a stationary ring 5! secured in the ‘up
any vibration is present the table and camera
per end of the outer sleeve 55. A suitable lens
vibrate together as a unit.
assembly 52, having a lever 53 for adjustment of
A further object is to provide improved ilthe usual iris diaphragm (not shown),ismounted
luminating means for the object table.
in the barrel 41.
Another Object is '60 provide improved power 30
A reversible motor 54, mounted on the bottom
and control means by which elevation and lowerof the camera base 43, has on its shaft a, worm
ing of the camera, adjustment of ‘the lens focus,
actuation of the indexer and shutter, and the
5e meshing with the gear ring 43_
From the foregoing description it will he evi
various other operational functions are readily
dent that when the motor 54 is operated the
cal‘riedrollt by 1661110175 Control from a Single 'oper- 3'5 worm 56 revolves the gear ring 46 and with it the
ator’s station.
sleeve 45. The barrel 4'! being threaded, in sleeve
Qtber objects and advantages of the invention
45 but restrained from rotation by the stationary
will become evident during the course of the fol-
key 56, rotation of sleeve 45 feeds the barrel 4?
lowing description, in connection with the accomand with it the lens assembly 52 upward or dawn
Pally-ins t11"aWiI1gS,inWhiCh—
‘1'0 ward depending on the direction of rotation of
Figure 1 15-21. vertical side view of the camerathe motor 54. Thus the motor 54 is adapted to
projector and related apparatus partly in section;
adjust the focus of the lens assembly 52, each
revolution of the motor changing the lens posi
Figure 2 is a detail View Of the elevation indi_ tion by a de?nite small increment pro-determined
eating scale;
40 by the lead of the thread 43 and the reducing
Figure 3 is a detail view of the exposure motor
ratio of the worm ‘5'6 and gear 46; for example,
holding switch and cam;
an increment of .00025 inch.
Figure 4 is a similar view of the cam and switch
Removably disposed in the central portion 50
for controlling open shutter Warning light during _' of the camera-projector 62 is a ?lm-control and
picture taking;
"a shutter sub-assembly 6!, shown in detail in Fig
Figure 5 is a detail plan view of the ?lm gate,
ures 5 to 15, and to be presently described.
indexing, registering and shutter structure;
A lamp housing 52 is horizontally pivoted at
Figure 6 is a vertical detail view of the‘ same
as and normally engages the top of the central
partially on the lines 6-5, Figure 5;
__ portion 60 in light-tight relationship. A con
Figure 7 is a detail view of the pressure plate ‘JD densing lens system 64 is secured in the bottom
control cam, lever and plunger;
of the housing 62 in optical alignment with the
Figure 8 is a ‘detail View of the indexing cam,
projection or photographic lens 52. ‘A lamp 65
leverrand plate;
is mounted in a socket 86 in the rear end of the
Figure 9 is a vdetail side view of the camshaft
housing 62. An inclined mirror 6"! is adjustably
gear and cams‘;
60 secured to the upper front wall 68 of the housing
vided with horizontal side slots I09 and H0}
in position to direct light from the lamp 39 to
the condensing lens system 64, thence through
the sub-assembly BI and projection lens 52. Ven
through which the ?lm I91 is threaded. The ‘
?lm overlies a gate or circular mask II I secured
in a horizontal partition H2 in the casing I08. A
tilation for the lamp 35 is provided by a pipe 99
transparent pressure plate I I3, preferably of cir
cular shape, is held in a frame I I4 trunnioned at
H5 and H3 toayoke H1. The shank H9 of yoke
H1 is loosely pivoted to the top of a plunger II9
vertically slidable in a boss I20 in the partition’
IIZ as shown in detail in Figure '1, the plunger
leading up through the bottom of the housing >
62 and suitable openings ‘Iii in the rear thereof.
A light shield or hood TI is pivoted at 12 to
the carriage 4|, the front‘ upper end 13 of the‘
hood normally overlying the rear top of the lamp‘
housing 62. A rod 14 is horizontally pivoted at
15 to the rear of the housing 92, while the rear
- II9 being urged upward by a spring I2 I. A ful
crum block I22 has therein a slot I23 in which the
shank H8 is retained hy means of a normally
end of the rod engages a socket. 19 secured to the
back of the hood 1 I.
retractible pin I24. The lower end of the plunger
I I 9 is slotted and has therein a cross pin I25 sup
porting the end of a lever I26 which is fulcrumed
When the housing 62 is swung upward and
rearwardly on its pivots 63 to allow access to the
sub-assembly 6| as hereinafter set forth, the rod
14 swings the hood 1I upwardly as illustrated in
on a stationary pivot pin I21. A cam I28 on the
drive shaft 19 engages and is adapted to rock the
dot and dash lines, Figure 1, thus providing ample
clearance between the top of the housing and the
lever I 26 downward.
A motor 11 having a suitable speed-reducing
gear head ‘I9 is mounted in the base 43 and is
adapted to drive the shaft 19 of the sub-assembly
6| through an extension shaft 99 and a jaw cou~
pling BI.
The extension shaft 89 carries two \
cams 82 and 03, shown in detail in Figures 3 and
4, these cams being adapted to respectively con~
trol switches 94 and 85 for purposes hereinafter
set forth. Rubber vibration dampers We are pro
vided in the mounting of motor 11.
The column 40 is provided with a longitudinal
' Normally the upward pressure of the spring
I2 I, acts through the plunger I I9, holds the
shank IBI of yoke I I1 against the retractible
pin I23, the latter acting as a fulcrum and caus
ing the vtrunnioned pressure plate “3' to press
the film I91 downward against the gate I! I. The
trunnions II5 and N9, the free sliding and rock-'
ing permitted the shank I I8 in the fulcrum slot
' I23, and the loose pivoting of the shank to the
plunger H9, allow the pressure plate I I3 to float
into ?rm and even engagement throughout the
entire underlying portion of the ?lm I91, thus as
suring accurate ?atness of the latter across the
key 86 ?tting in the rear portion of the carriage
gate III.
4|, thereby preventing any swinging motion of
When the cam I28 rocks the lever I26 down
the carriage and camera-projector about the
during the operation of the device as here
inafter described, the plunger I I9 is drawn down
A reversible motor 81, mounted under the frame
ward against the pressure of spring I2I. The
30, is provided with a worm-gear speed reducer
shank H3 engages the curved bottom I23a of the
88 roller
on95itsis output
to the89upper
a sprocket
portion of
slot‘ I23 which acts as a fulcrum, causing the
the carriage 0i and extends upward therefrom 40 pressure plate I I3 to be raised out of engagement
with the film I01.
and over an idler sprocket 92 on the top of the
column 40, thence downward through the inte
rior of the column and around a second idler
sprocket 93 to the drive sprocket 90, and thence
A second shaft I29, journalled in the casing
I00 and hereinafter referred to as the sprocket
shaft, has rotatably mounted thereon a sprocket
via a third idler sprocket M to a turn-buckle 95 45 spool I30, the latter having the usual teeth I3I
engaging the perforations I32 of the ?lm I01. A
grooved shoe I33 underlies the sprocket I30 and
keeps the ?lm at all times in proper engagement
with the sprocket teeth.
A horizontal drive pin I34 is secured in the rear
and as the worm speed reducer 88 is of the irre 50
end of the sprocket spool I30. An annular driv
versible drive type the latter acts as a lock to
ing member I35, slidably mounted on the shaft
hold the carriage at any point of elevation when
I29, has a series of index holes I33 correspond
the motor is stopped. The turn-buckle 95 is op
ing in number and circumferential spacing to the
erable to take up any slack in the chain. A heavy
sprocket teeth I3I, each hole being adapted to
weight EiIa is secured to the chain 9! inside ‘the
engage the pin I34 as-shown in Figure 5. When
column 90 to serve as a counter-balance for the
so positioned the driving member I35 is held
greater part of the weight of the carriage and
pressed in the described driving engagement with
the pin I34 by a compression spring I31. A pin
A measuring tape 99 has its free end clipped
to the chain 9I at 91 just below the turn-buckle 60 I38 in the shaft I29 engages a longitudinal slot
I39 in the member I35, allowingthe latter to be
95, the tape extending downward in front of the
slid longitudinally on the shaft but normally pre
chain through a slot 99 in the table 39 and to a
venting any rotary motion between. these parts.
spring actuated retracting reel 99 of any suitable
A short circumferential extension I40 is- pro
type secured under the table. 1
As the mechanisms of such reels are well known 65 vided in the front of the slot I39.
When it is desired to rotate the sprocket I39
and} form per se no part of the present invention,
manually, as in threading, adjusting or remov
no further description is required herein. It is
ing the ?lm I01, the member I35 is slid rear
evident, however, that as the carriage is moved
wardly against the pressure of spring I31 until
upor down the tape 96 unreels or re-reels through
the'slot 93 and the figures I99 (see also Figure 2) 70 the front of the slot I39 encounters the pin I39,
whereupon the member I35 is turned to hook the
thereon serve as a visual indication of the height
pin I38 in the circumferential extension I40 of
of the camera-projector above the table 34 as
the slot and thereby prevent forward sliding re
_ illustrated in Figure 2.
turn of the driving member. By this operation ,
Referring to Figures 5 and 6, it will be seen
that the sub-assembly GI has’ a casing I08 pro 75 the driving member I36 is withdrawn from and,
secured to the bottom of the carriage 4!.
When the'motor 31 is operated to drive the
chain 9| the carriage and camera-projector assembly is raised or lowered along the column ‘99,
locked out of-engagement‘with the pin I94, leav
ing the sprocket free to be manually revolved on
the shaft I 29. When manual adjustment is com
pleted, the member I35 is returned to engagement
with the sprocket hub by the reverse of the re
leasing-operation described, the pin I94 entering
any chosen hole I36 andassumingan ‘accurately
indexed setting.
tent‘ I5I rides on ‘the periphery of the plate I42‘
until the succeeding notch I149 or I50moves into
registry with the detent, when the latter again
is forced into the notch by the spring ‘I54 to
again release thepawl Ii55‘and stop the plate and
sprocket as previously described.
From the foregoing, it is ‘evidentthat once dur
ing each revolution of the drive shaft 19, vthe
The spring I 3''! is backed by the hub I41 of a
plate I42 and sprocket I30‘ are driven exactly
clutch ‘plate I42, the hub I4I being pinned to 10 one-half revolution, and ‘the ?lm I01 is conse
the sprocket shaft I29. To the rear of the plate
quently moved an index distance corresponding
I42 is a ratchet I43 having a hub I44 carrying a
to one-half the pitch circumference of ‘the
spur pin-ion I45 (Figures '5‘ and 11), the ratchet
sprocket I30, this distance equalling one *frame
and gear ‘combination being rotatably mounted
spacing of the film. ‘Since the ratchet I 43 is
on the shaft 1 29.
15 driven at double the rotative speed of the drive
The pinion I45 meshes with an idler- gear I46
shaft 79, as previously‘set forth, ‘it is alsoevident
which in turn meshes with a gear 'I-4'I~secured to
that the movement of the film» takes place/dur
the ‘drive shaft 19, the driveratio-in the present
ing one-quarter revolution of the drive shaft 119.
embodiment being one to two, 1i. e., one revolu
The earn l28 (Figure 7) has a comparatively
tion of the drive shaft '19 drives the ratchet I43 20 wide lobe I~28a which forces the lever I26 down
through two revolutions. ‘The gear I41 carries on
ward just prior to release of the detent 45I from
its rear side the cam I29 as shown in ‘detail in
Figure‘Q. The gear also carries on its front side
a second cam I48, the‘ purpose of which will pres
ently be explained.
The clutch plate I42 has in its periphery two
oppositely spaced notches I49 and I5!) (Figures
8, 1‘0, '11 and 12), adapted to receive a detent
151 “on theend of a lever (‘I52 pivotedon the pin
[2‘! (Fig-ure 8).
A horizontal arm‘ I53 of the lever ‘I52 engages’
the second ‘cam ‘I548. A tension ‘spring I154 urges
the arm ‘1'53 upward ‘to hold the detent I5I in-en
' its engaged notch and holds ‘the lever I26 Ide
pressed during the described half-revolution of
the sprocket I 30.
By this means the pressure plate H3 (Figures
5 and 6) is raised and held clear of the ?lm 101
while the latter is moved. In Figure ‘6, it will be
observed that while released by the pressure plate
II3, the ?lm I0‘! is guided by the shoe I33 and
a roller I64, the latter being \disposed‘in the left
hand magazine I101 near the reel I95 as shown
diagrammatically in Figure 13. The heights of
the shoe ‘I33 and roller I64 are such that when
gagement with the plate I42 except when the de
released as noted, the ?lm I07 clears ‘the gate
tent ‘is withdrawn by action of the cam I48 as 35 II I, By this means the ?lm is kept out of slid
hereinafter set forth.
ing contact with the gate during its movement,
A pawl I55 is pivoted at I 56 to the rear face
thus avoiding any ‘possible abrasion.
of the plate I42 and is adapted to be rocked into
A pulley £95 on ‘the end of the sprocket shaft
engagement with the ratchet I49 by a spring I5‘!
I29 (Figure 5) drives a spring friction belt 166
(Figures 1-0 and 12).
The rear end I58 of the 40 which in turn engages 1a second‘pulley I167! con
pawl I55 is disposed alongside the notch I49, so
nected to the film reel I06 as ‘shown diagram
that when the detent I5I occupies the notch I49
matically‘in Figure 13, thus providing a yielding
as shown in Figure 16, it holds the pawl I55 out
or slip take-‘up drive’for the reel ‘I 06.
of engagement with the ratchet I43.
A disk ‘shutter I68 (Figures -6, 14 and 15‘) is
An ‘arcuate link I59 'is articulated at I60 to the 45 rotatably mounted on the bottom plate I69~ofthe
pawl I55, and at PM to ‘a short second link I62
sub-assembly casing 68, and is adapted to be
which is pivotally mounted at I63 on the plate
driven at ene-to-one ratio from the drive shaft
‘I42. The joint I6I between links I59 and I62 is
19 via mitre gears ‘I19 and Ill. The shutter ‘I68
disposed beside the notch I50, so that when the
normally overlies and closes off a light opening
‘detent I 5| enters the notch vI50 it presses the 50 H2 in the bottom plate ‘I 99 above the lens 52 and
‘joined ends ofthe links inward, causing the links
in optical alignment with the ?lm gate I I "I.
to operate as a toggle to force the pawl I55 out
By this means the shutter-normally prevents
‘of engagement with the ratchet I43. Thus it will
passage of light between the lens and ?lm. The
be seen'that engagement of the detent I5I ‘with
shutter I68 has a cut-out portion ‘or notch I73
I'ei-ther notch I49 or I 50 releases the pawl I55
extending throughout 90 degrees ‘of arc in the
from the ratchet, while the detent, urged into
thenotch by the tension spring I54 (Figure 8),
embodiment illustrated.
stops and holds the plate I42 in a pre-determined
position, the ratchet "I43 continuing to revolve
speed, the ‘passage of the notch I13 over the open
ing permits the passage of light from the lens
to the ?lm for a pre-d'etermined exposure time,
as hereinafter set ‘forth. The gearing of the
shutter to the shaft ‘I9, o’f course‘is so arranged
that the exposure takes place while the film I01
on the shaft I29.
During rotation of the- shutter at ‘constant
As the plate I42 is normally connected to the
sprocket 130 via the shaft I29 and driving mem
ber I35, as previously described, the sprocket I30
and ?lm I97 are thereby held accurately in in
is 3stati0nary and held ?at by the pressure ‘plate
'dex position as long as the detent I5I remains 65 II .
in one of the notches I49 or I50.
Referring to the typical'wiring ‘diagram (Fig
Once during each rotation of the drive shaft
ure 16), the numerals 204 and 205 designate the
‘I9 (Figure 8), the ‘cam I48 depresses the lever
conductors of a suitable source of A.-C. current
arm. I93, thus withdrawing the detent I5I from
supply, leading into the main or line switch I86,
whichever notch it has previously engaged, al 70 thence to distributing conductors 296 and 207.
lowing the pawl I55 to engage the rotating
Branches 208 and 209 lead'to manual switch
ratchet I43 and thereby drive the plate I42 and
hereinafter termed the light switch. From
sprocket I30.
the "output poles of the switch I85 wires, 2H) and
When the comparatively narrow lobe I 48a of
the 'cam I48 releases the lever arm I53, "the de
2| I are connected to the‘variable transformer I8].
75 The lamps I94 for illuminating "the documents ‘
second distributing conductor 201; A manual
are connected in parallel between conductors 2 I2
and 2I2a fromvthe output terminals of the trans
former I81.
It will be seen from the above description that
when the switches I86 and I31 are closed, the
switch I18 is shunted across the time switch, I83
by means of wires 229 and 230. Thus when switch
I18 is closed, the, lamp'?iiremains energized ir
respective of the time switch I83.
The time switch I83 is preferably of the well
known electrically actuated type, a branch 226“
being provided. to supply a current ‘connection
from 206 to the actuating mechanismunder con
lamps I94 draw current’ and are illuminated, the
voltage and consequently the intensity of the il
lumination being adjustable by means of the
variable transformer I81.
The reversing switch I19 is of the three-pole 10 trol of the button I84. The shutter motor 11 is
connected on one side via‘a lead 23I to the con
double throw construction with a central “off”
position. The switch has upper and lower con
tact points 2I3, 2I4, 2I5 and 2I6, 2I1, 2I8, re
spectively adapted to be alternately engaged by
poles 2I9, 220 and 22I, poles 2I9 and 220 being
ductor 206. A wire 234, from the second side of
the motor 11, is connected to the normally open
electrically joined together; Contacts 2 I 4 and 2 I 5
cam switch 84 (Figures 1 and 3) thence via lead
235, the toggle switch I11, and a lead 236 to the
conductor 201. Also, from the other or second
are respectively cross connected in the usual man
side of the motor 11, a wire 232 is connected to
the normally open foot switch 20I, which latter
ner with contacts 2I1 and 2I8 for reversing the
is in turn connected via lead 233-to the lead 235.
current direction through ?eld connectors 222 and
From the above connections, it is evident that
223 leading to the elevating motor 81. Poles 220 20
the motor 11 may be energized through either one
and 22I have leads 224 and 225 comprising arma
of two parallel circuit-closing means, that is‘ via
ture connections to the motor 81. Pole 22I is also the foot-switch 20I or via the cam switch 84
connected via the normally open push-button
and manual switch I11., which latter is normally
switch I8I with the distributing conductor 206.
Poles 2I3 and 2I6 are connected to the second 25 kept closed during photographing operation. The
cam 82, as previously set forth, is secured on
conductor 201 respectively via the normally closed
the, low-speed geared output shaft 80 of thermo
limit switches I95 and I96.
When the switch I19 is thrown to upper posi
tion and the push-button switch ISI is closed,
tor 11. The contour of the cam 82 is such that
it allows the switch 84 to remain open only in nor
the connection from conductor 206 is completed
mal or stop position as shown.
via switch IBI, pole 22I, to the motor armature
When the foot-switch 26I is momentarily closed
lead 225,_also via pole HI and contact 2I5 to the
to start the motor 11, the initial movement of the
?eld lead 223.
cam 82 also closes the switch 84 and holds it closed
At the same time current flows
from the conductor 201 via limit switch I95,
contact 2I3 and pole 2I9 to the pole 220, thence
to the second armature lead 224, and via contact
2I4 to the second ?eld lead 222. ‘By this means
the motor is energized to raise the carriage 45
(Figure l) .
after opening of the foot switch, thus keeping
the motor energized and causing it. to drive the
shaft 80 throughout one complete revolution,
whereupon the cam 82 again allows the switch
34 to break the circuit and stop the motor 11.
If the toggle switch I11 is opened, as in projec
When the switch I19 is thrown to downward 40 tion operations hereinafter described, it is evident
that no holding circuit can be established by the
cam switch 09, and the motor 11 remains solely
leads 224 and 225 are the same as described ex
under control of the switch I11.
cept that the pole 2 I 9 received current from con
The second cam-switch 85 (Figures 1 and 4) is
ductor 201 via limit switch ‘I96 and lower con
tact 2I6 without any change in polarity. How 4.5 connected in series with the signal lamp 203 across
the conductors 296 and'261 via wires 231, 238, and
ever, the ?eld leads 222 and 223 now receive their
239 (Figure 16). The cam 83, also mounted on
current from poles 22I and 220 respectively
the shaft 86 as previously set forth, is of such
through the cross connected contacts 2I8 and 2I1
contour as to close ,the switch 85 ‘and thereby
respectively. The motor ?eld is thereby reversed,
causing the motor 81 to revolve in the reverse 50 cause the signal light 203 to light up during that
portion of the revolution of shaft 60 when the
direction and lower the carriage 4 I .
previously described shutter I68 is open.
If during upward driving operation of the mo
The focusing motor 54 is connected through
tor 81 the limit switch I96 is opened, the de
the reversing switch I30 with the conductors 206
scribed supply from conductor 201 is broken caus
ing the motor 81 to stop. Thereafter, current 55 and 201, the normally open push-button switch
I82 being interposed in the circuit connection
can be restored only by throwing the switch down
from conductor 206. As the operation and wir
ward to complete the connection through the sec
ing of such reversing switches are well known
ond or lower limit switch I96, whereupon closure
and have previously been described in connec
of the button switch I8! again energizes the mo
60 tion with elevating motor 61, further detailed de
tor in the downward driving direction.
scription thereof is believed unnecessary repeti
Similarly, if the lower limit I96 switch is opened
tion herein; it is evident that throwing the switch
' to stop the motor, the latter can only be ener
I86 to upper or lower position conditions the mo
gized after throwing the switch I19 to upward
tor circuit for operation of the motor in either
driving position.
By the above described means, it will be seen 65 desired direction under control of the push-but
position, the current connections to the armature
~ that engagement of either limit switch with its
operating abutment I99 or200 stops the progress
of the carriage 4|, but the latter may be there
after moved away from the extreme or limit po
ton switch
The operation is as follows:
When it is desired torecord images of docu
sition after reversing the switch I19.
ments, maps, drawings, or the like, the operator
Returning to Figure 16, a branch lead 226 con
?rst places a frame of developed ?lm in position
nects one side of the projection lamp 65 with the
on the ?lm-gate I I I under the pressureplate I I3,
distributing conductor, while the other side [of the
the housing 62 having been previously swung‘up
lamp is adapted to be connected via a lead 221,
the time switch I83, anda second lead 228 to the 75 ward and open on its pivots 63 to allow access to
9 .
the interior of the sub-assembly 6|. While the
housing is open, the spring-pressed fulcrum pin
I24 (Figures 5 and 6), may be withdrawn to the
left, releasing the shank II8 so that the pressure
plate H3 may be swung upward clear of the ?lm
I Ill and gate II I to facilitate positioning the ?lm.
This process is then reversed. The housing 62
is closed down, and the “enlarger” switch I18 is
closed, thereby turning on the projection ‘lamp *
ing the remainder of the‘ revolution of shaft 80
after closure of the shutter, the cams [I28 and
I48 respectively raise the pressure plate I I3 from
the ?lm it)? and disengage the detent IEI from
the notch N59 or I5?, thereby causing the sprocket
535] to move the ?lm forward one frame in the
manner previously explained. The single revolu
tion of the shaft 89, Figure 5, thus effects the ex
posure and-conditions the apparatus for thenext
65. The operator next depresses the foot-switch 10 exposure. The operator removes the ?rst docu
20I, starting the shutter control motor ‘I’! and
meritv or other subject photographed from the
allowing the latter to run under control of the
table 3%, places the second in the same position,
cam-switch 84 until the shutter reaches wide
and again depresses the foot-switch 20-1 to photo
open position. At this point the manual switch
graph the second subject, and proceeds in the
I1? is opened to stop the motor 77, leaving the 1.5 manner described to record the desired series" of
shutter in open position, the pressure plate hav
subjects on successive frames of the ?lm I01.
ing meanwhile been lowered into engagement
As noted previously, an entire series of subjects
with the ?lm by the spring IZI, Figure '7.
may be‘ photographed after a single initial set
The shutter I68 being open, light passes from
ting of the ?eld and focus. However, once a
the lamp 555 to the inclined mirror 61, thence 20 certain desired ?eld and focus setting have been
downward through the condensing lens system
arrived at for a given size of subject, no initial
54!, the shutter sub-assembly 6! and the ?lm
projection is necessary thereafter in order to ar
therein, and the lens 52, an image of the devel~
rive at‘this setting for later recordings, due to
oped ?lm frame being projected on the table 313
the provision of the height scale 96, Figures 1,
or on a sheet of material spread thereon. The 25 and 2, and the focal setting. When the operator
operator then manipulates the elevator switch
has initially arrived at the proper ?eld and focal
I19 and push-button IBI .to lower or raise the
settings as described, he may observe and note
carriage and camera-projector by means of the
down the readings of the scale 96 and the focal
motor Bl until the projected image covers the
setting. Thereafter, when it is desired to photo
desired area.’ The operator similarly manipulates
graph further subjects of the size or seriesnoted,
the switches I80 and IE2, to adjust the lens 52 by
or to reproduce the subjects by‘ projection as
means of the focusing motor 54 until the image
hereinafter described, it is only necessary to op
is» sharplylfocused. The. foregoing ?eld and focus
erate the elevating and focusing switching means
adjustments‘ may be made with‘the image pro
until the previously noted height and focal read
jected directly ontthe sheet to be photographed 3-5 ings are obtained. Similarly, subjects of differ
orv on a suitable blank‘ sheet of proper size.
- The document, drawing, or the like, having
beensecured to the table 34 by any suitable
means such as tacks, tape, or weighted retainers,
and the previously described ?eld and focus ad
justmehts having been made, the lamp 65 is ex
tinguished by opening the switch I18 and the
‘ ent areas may be photographed in series with
out intermediate test setting or focusing, simply
by manipulating the elevating and focusing con
trols to bring the scale ‘and counter readings to
previously determined proper ?gures for the‘var
ious sized subjects. In case of series photograph
ing of widely differing ?elds or areas, and conse
quent lens distance, it may also be desirable to
the motor ‘H to be energized through the cam
Vary the intensity of the illumination by manip
switch '84 as previously described. The motor 45 ulation of the transformer control handle I90 as
shutter switcht'l'l is‘closed, ‘the latter causing
ll‘! ‘runs until the cam 82 opens the switch 85 in
normal position as shown in Figure 3, thereby
previously described.
It will be noted that all of the foregoing opera
closing‘ the shutter. The ‘operator replaces the
tions may be effected by the user. from a single
developed‘ film with unexposed ?lm, threading
position in front of the table 31!, the normal
the latter from the reel I85, through‘the control 50 functions , of setting camera height, setting the
sub-assembly 5|‘, as shown in Figures 5 and‘ 6,.and
focus, setting the illumination, making the ex
to the take-up reel‘ tilt; the housing 62 is again
posure, and resetting the ?lm being carried out
lowered into closed position to exclude light.
by remote control from the panels I75 and H6.
‘It will be‘ understood the above described_
preparatory ?eld and focus setting .need be' per
formed only once, at the beginning of a series of
photographic recordings of similar size.
To photograph the document spread on the
table '34 the lights I95 are turned on by ‘closing
the switch I35 and if required the intensity of 60
illumination is adjusted by means of" the vari
able transformer ‘I31, either to a pro-determined
setting of the handle T90 or by use of’ any suit
able light meter.‘ The operator then momen
tarily closes the foot-switch 20! to start the shut
ter motor ll‘, the cam-switch ‘8t thereafter caus
ing the motor to' drive the shaft 80 until one com
plete; revolution is. completed as previously set
Even the manual operation of changing or ad
justing the ?lm It? in the camera may be carried
out from the same position, since the camera
may be lowered to extreme bottom position di
rectly in front of the operator, the proper original
height being afterward restored, as previously
noted, from the scale 96. It is obvious that pro
vision of the described complete remote control
from a single position adapts the device to rapid
and easy operation with a minimum of fatigue
for the user.
When it is desired to reproduce previously pho
tographed subjects,‘ the developed ?lm carrying
the images is threaded into the camera-projector
A2 in the manner previously described for inser
During the single revolution noted, the notch 70 tion of raw ?lm. The projection lamp 65 is
or‘ opening I13 of the shutter I68 traverses the
turned on, the shutter I68 is again opened by
optical path between thelens Wand the ?lm I 61,
manipulation of switches Ill and‘ 2M, and the
allowing the lens to cast an illuminated image
proper camera heightand focus are arrived at
of the document on the ?lm during a pre-deter
either by direct test projection on a blank sheet
mined length of time to effect the exposure. Dur 75 on the table 34 or by setting to height and focal
said frame and joining said sides to'divide said,
indicating ?gures previously noted at the time of
photographing the particular subject to be re
frame into an upper and a lower compartment, 9.
?lm gate formed in said web, a transparent pres-,
sure plate in said upper compartment, a holder
for said pressure plate, a yoke on which said hold
er is trunnioned, a lever supported on said web,
.produced. _ The time switch, I83, having been set
for. the desired period of exposure, the switch I18
is opened to extinguish the lamp 65 and a suit
able sheet of sensitized paper or the like is se
cured in proper position on the table 34.
The time switch I83 is tripped by means of its
in said upper compartment and carrying said
yoke, a plunger reciprocally mounted in said web
button I84, the switch closing and remaining
- and having its upper end pivotally connected to
closed for the predetermined time in the usual 10 said lever, spring means urging said plunger and
of such switches. The lamp 65 is there
imparting said urge via said lever to said pressure
by illuminated during the pre-determined period,
plate, an intermittent movement for moving said
during ‘which period the' enlarged image from
?lm through said gate, and cam means in said
the ?lm IE3‘! is projected on the sensitized sheet.
lower compartment connected to said movement
When the time-switch I83 has again extin 15 and adapted to move said plunger against the
guished the lamp 65 the sensitized sheet is re
urge of said spring and separate the pressure
moved for development and/or ?xing in the usual
plate from said ?lm gate while said ?l-m is mov-;
manner. In case a succeeding image on the ?lm
ing therethrough.
strip is to be reproduced, switches I11 and ZIII
are operated until the shutter motor l'l has closed 20
gular frame having vertical sides, a web within
and again reopened the shutter I68, during which
said frame and joining said sides to divide said
operation the ?lm has been advanced one frame
frame into an upper and a lower compartment,
in the manner previously described, after which
2. ?lm gate formed in said web, a transparent
a second sensitized sheet is placed in position
and the second projection exposure made as set 25 pressure plate in said upper compartment, 2. hold
er for said pressure plate, a yoke on which said
is trunnioned,' a lever supported on said
In case it is desired to make more than one
web in said upper compartment and carrying said
print from the same ?lm frame, the operator
yoke, a plunger reciprocally mounted in said web
simply changes the sensitized sheets and effects
the exposures by repeated trippings of the time 30 and having its upper end pivotally connected to
said lever, spring mean'surging said plunger and
switch I83 without intermediate closings of the
imparting said urge via said lever to said pres
shutter I68.
sure plate, an intermittent movement for moving
All the described reproducing operations are
said ?lm through said gate, a lever pivotally sup
carried out from the single operating position,
and-except of course for changing the sensitized 35 ported in said lower compartment and having a
free end operatively connected to said plunger,
paper, all are done by, remote control, with the
and cam means in said lower compartment con
same advantages of speed, ease and precision
nected to said movement and adapted to engage‘
and move said lever, thereby moving said plunger
‘While the apparatus is adapted to reproduc
tion in the precise original size, it is obvious that 40 against the urge of said spring and separating
the pressure plate from said ?lm gate while said
enlargement or reduction in the reproduction
?lm is moving therethrough.
may, readily be made by proper setting of cam
noted with‘ respect to recording.
era-projector height and focus.
' 3. In a camera projector, ‘a horizontal rectan
gular frame having vertical sides, a web within
From the foregoing description it will be seen
that the invention makes possible the photo 45 said frame and joining said'sides to divide said
graphic recording and reproduction‘ with maxi- .
frame into an upper and a lower compartment,‘ a
mum rapidity, precision and accuracy, guess
?lm gate formed in said web, openings formed in
opposite walls of said'frame in alignment with
work being eliminated.
The' accuracy is aug
said ?lm gate and providing i passage there
mented by the fact that reproduction takes place
by projection through the same lens and, if de 50 through for said ?lm, a transparent pressure
plate in said upper compartment, a holder for
sired, ‘with the identical setting used in the
said pressure plate,‘ a yoke on which said holder.
original photographic recording. Thus any de
is trunnioned, a lever supported on said web in
fects, such as optical aberration or blurs im-_
pressed on the ?lm for any reason, even such ‘as
, said upper compartment and carrying said yoke,
slightoptical defects in the lens, are automatical 55 a plunger reciprocally mounted in said web and
having its upper end pivotally connected to said .
ly cancelled out and corrected by reversal in the
lever, spring means urging said plunger and im—
projection through the same lens; the results are
parting said urge via saidlever to said pressure
thilis uniformly sharp reproductions of the origi
na s.
, A convenience outlet 248, connected to the con
ductors 295 and 291, Figure 24, may be provided
at any suitable location on the device, for sup
plying current to any auxiliary electrical appa
ratus, such as extension lights or the like, which
it may be desired to use in connection with the
plate, a shaft in saidupper compartment, an in- .
60 termittent movement for moving said ?lm
through said gate, a lever ‘in said lower compart
ment having one end pivotally supported therein
and having its other end operatively connected
to said plunger, said lever also having a step
formed intermediate the ends thereof, and a cam
carried on a shaft journalled in said lower com
While the invention has’ been described in [pre
partment, said shaft being geared to said first
ferred form it is not limited to the precise struc
tures illustrated, as various ‘modi?cations and
changes may be made without departing from the
scope of the appended claims.
shaft, said cam acting against said step for mov
, What is claimed-is:
1. In a camera projector, a horizontal rectan
gular frame having verticalsides, a web within
ing said lever and in turn moving said plunger
against the urge of said spring to separate the
pressure plate from said ?lrn gate while said ?lm
is moving therethrough.
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