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Патент USA US2130793

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Sept. 20, 1938.
L. T. ELIEL
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27. 1936
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l0 Sheets-Sheet l
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Sept. 20, 1938.
L.. T. ELIEL
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27, 1956
l0 Sheets-Shea?l 2
Sept. 20, 1938.
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L. T. ELM-:1_
MULTIPLE TRANSFORMING PRINTER
Filed April 27, 1936
lO Sheets-Sheet 3
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Sept. 20, 1938.
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2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27, 1956
l0 Sheets-Shes?l 4
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Sept. 20, 1938.
1_. T. ELIEL
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27. 1956
l0 Sheets-Sheet 5
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Sept. 20, 1938.
L, T_ ELlEL
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27. 1936
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Sept. 20, 1938.
L. T. ELIEL
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27. 1956
l0 Sheets-Sheet '7
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Sept. 20, 1938.
L, T. ELM-:L
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27. 1936
10 Sheets-Sheet 8
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A TTOR/VEY.
Sept. 20, 1938.
L, TA E|_|EL_
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27, 19156
l0 Sheets-Sheet 9
_
A rrOR/VEY.
Sept. 20, 1938.
L_ T. ELlEl.
2,130,793
MULTIPLE TRANSFORMING PRINTER
Filed April 27, 195e
' 1o sheets-sheet 1o
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'2,130,793
Patented Sept1 20, 1938
UNITED STATES PATENT OFFICE
2,130,79'3
MULTIPLE TRANSFORMING PRINTER
Leon T. Euer, rumena, cam.
Application April 27, 1936, Serial No. 76,573
7 Claims.
This invention relates to transforming printers
whereby photographs having images which are
distorted, by reason of the fact that they have
been taken at oblique angles, are corrected in
5 the printing thereof so as to eliminate the dis
tortion of the image and thereby produce a print
wherein the various parts of the image are spaced
apart/in accordance with the true scale relationr
ing the foregoing members in such a manner
that they may be quickly aligned and so that «
the positions thereof may be changed at any time
to change the focal distances and also the angu
lar relationship of the photograph support and 5
the print support under various selected condi
tions of operation, such as a change in the focal
distance of the lens or the use of the transform
in which the original parts represented by the
ing printer with photographs made by a different
image existed at the time the photograph was
taken. The invention relates in particular to a
transforming printer whereby a plurality of com
multiple-lens camera.
plementary oblique photographs/„which have been
simultaneously taken may be transformed and.
printed on a single sensitized member, such as a
photographic negative.
Herein I use the term “complementary photo
graphs” to indicate two or more photographs si
multaneously taken of adjacent sections of an
20 area, and likewise employ the term “complemen
tary images” to mean the images of photographs
simultaneously taken of adjacent sections of an
area and which, when properly combined in side
by-side relation, will form a complete picture or
of the total area covered by the comple
L25 image
mentary images. 'I‘he invention is of especial
utility in the art oi' map making, wherein the
terrain is photographed by use of a multiple-lens
camera in which the lenses are so placed that
30 they will photograph on separate negatives com
plementary images of complementary sections of’
an area of the terrain. It has been the custom
ary practice to print each image of a set of com
plementary images separately by use of a trans
35 forming printer, and then join the separate prints
together in side-by-gde relation so as to produce
a picture of the entire ar‘ea covered by the set
of .complementary photographs.
It is an object of the present invention to pro
40 vvide a transforming printer whereby the com
plementary images of a set of complementary
photographs may be printed on a single sensi
tized member, such as a photographic negative,
thereby Aforming the complete or composite pho
45 tograph without the necessity of separate prints
as has been heretofore necessary.
It is an object of the invention to provide a
transforming printer having a rotary head or
photograph support with means thereon to carry
50 a plurality 'of photographs, a rotary> print ísup
port for carrying a sensitized photographic sheet
or plate on which the composite print is to be
made, and a lens support carrying a lens in oper
ative position between- kthe photograph support
55 and the print support, with means for support
`
10
It is a further object of the invention to pro
vide a transforming printer of the above char
acter having a removable head or photograph
support in duplicate so that one set of comple
mentary images can be printed from photographs
held in one of the heads while another set of
photographs is being mounted inthe other head
in preparation for the transforming and printing
thereof.
It is a further object of the invention to pro 20
vide a simple means for holding the photograph
or analogous means carrying the distorted com
plementary imagesA in proper position on the ro
tary head, together with an improved means for
bringing the photographs into practical positions
of registration. Multiple-lens cameras of the
character employed in aerial photography gen
erally provide registration marks in their margins
by means of which the relationship of each indi
vidual picture with its lens is re’corded. My
invention provides an effective means, utilizing
these registration marks, for locating the photo
graphs on the rotary head of the transforming
printer while the rotary head is removed from
the printer, and so that the images of the photo
graphs will al1 be in proper position for projec
tion in complementary relation onto a sensitized
member carried by the print support.
It is a further object of the invention to pro
vide a transforming printer of the above char
acter having a. mask disposed adjacent the front
surface of the print support, this mask exposing
on the face of the sensitized member carried by
the print support an area which is to receive the
transformed image projected from a distorted 45
image carried by the rotary head. The invention
also has as an object thereof to provide a means
for adjusting this mask to a high degree of pre
cision.
Illumination control in transforming pictures 50
taken by a multiple-lens camera is very trouble
some owing to the fact that the pictures arey
taken obliquely, one toward the sun', one away
from the sun, and-two at right angles to it, or
some similar arrangement. Asthe result, at least
2
2,130,793
three out of four of the pictures taken by a four
lens camera, for example, will be produced under
different conditions of lighting, with the result
that under ordinary practices of transforming
the prints separately and then assembling them
to produce the complete picture, great difliculty
is experienced in matching up the complemen
tary prints so that the same density within rea
sonable limits will be obtained in all parts of the
10i complete picture. It is an object of my invention
to provide a lighting system for the transform-`
ing printer adapted to be adjusted in accordance
with the requirement of a complete assembly of
complementary photographs carried on the ro
15 tary head'so that in the printing of the images
from these photographs consecutively onto a sen
sitized member carried by the rotary print sup
port, a practical matching of densities will be
accomplished in each of the complementary sec
20 tions of the completed print.
A further object of the invention is to provide
a photoelectric cell for making a ñnal check of
the printing lights used in the printing of the re
spective images from the photographs before
25 these images are printed onto the sensitized mem
ber, together with an arrangement whereby the
adjoining edges are matched with a high de
gree of precision by the checking of the printing
light through the overlapping edges of the re
30 spective complementary images. 'I'he `result of
the foregoing is that the composite prints ob
tained by the use of my transforming printer are
far superior, from the standpoint of color match
ing and detail matching. to results obtainable
35 when all of the transformations of a set of dis
torted images are individually transformed and
the prints therefromv subsequently trimmed and
assembled.
greater illumination than the sections which are
either not enlarged or are reduced in the print
ing thereof. It is an object of the invention to
45 provide means for light distribution and control
which are adjustable so as to compensate for the
variations hereinabove set forth.
"
Further objects and advantages of the in
vention will be made evident throughout the fol
50 lowing part of the specification.
Referring to the drawings, which are for illus
trative purposes only,
y
Fig. 1 is a diagrammatic view showing the re
lationship of a group of complementary photo-55 graphs taken by a multiple-lens camera with a
photographed area and with the composite pic
ture of such area.
Fig. 2 is a -plan view of a preferred form of
my transformer.
`
,
Fig. 3 is a fragmentary section taken as indi
cated by the line 3-3 of Fig. 2, but with the head
supporting easel turned into a plane perpendicu
lsr
tto the. longitudinal axis of the supporting bed
p a e.
65
dicated by the line >ill--lilboi’ Fig. 7.
Fig. 11 is a partly sectioned elevational view
of the printing head easel.
Fig. 12 is a face view taken substantially as in
dicated by the line l2-I2 of Fig. 11.
Fig. 13 is an enlarged fragmentary sectional 10
view taken as indicated by the line,«i3--I3 o
Fig.
12.
.
'
Fig. 14 is an enlarged fragmentary section
taken on the plane II-il of Fig. l2.
„
» Fig. 15 is a fragmentary, partly sectioned view 15
showing the means which I employ for checking
the projected light through use of a photoelec
tric cell.
Fig. 16 is a sectional View taken as indicated
by the line Iii-I6 of Fig. 15.
20
Fig. 17 is an electrical diagram showing the
means for controlling the printing light.
In Fig. 1, which is purely schematic, I show an
area 2i, consisting of complementary areas A, B,
C, and D, which is to be photographed. This 25
area 2| may be a portion of a terrain which, to
the eyes of a person in a position of elevation
thereabove, presents a picture. This area 2|
may be of such size that it cannot be suitably
photographed through a single lens; therefore, to
produce a picture thereof, a multiple-lens camera
is employed.
Although the multiple-lens camera used may
have various 'numbers of lenses, I shall in this
description of the adaptability of the invention 35
limit the description to the use of a four-lens
camera 22 having four negative plates or films A',
B', C', and D’ adapted to respectively receive
v
The problem of proper illumination is further
40 complicated by the fact that those sections of the
transformations whichk are enlarged require
60
the telescope holder thereof removed so as to
show the underlying parts and the manner in
which engagement with the plate holder is made.
Fig. 10 is a fragmentary section taken as in
Fig. 4 is a face view of the rotary head, viewed
as indicated by the line 4-4 of Fig. 3.
Fig. 5 is a fragmentary elevational view taken
as indicated by the line 5_5 of Fig. 4.
Fig. 6 is an enlarged sectional view taken on
70 a plane indicated by the line 5-5 of Fig. 4.
Fig. '7 is an enlarged plan View of the adjust
ing jig in place on the rotary head.
Fig. 8 is a sectional View taken substantially
as indicated by the line 8_8 of Fig. '.7.
Fig. 9 is a plan view of the adjusting jig with
the images of the areas A, B, C, and D. Owing
to the fact that the optical axes on which the
negatives A', B', C', and D’ are photographed
are oblique, the areas photographed upon the
negatives A', B', C', and D' will be of the char
acter of the respective areas a', IJ', c', and d' indi
cated by dotted lines in Fig. 1, and which radi- „
ate from a common center P. Further, in view of
the oblique setting of the negatives A', B', C', and
D' relative to the surface of the terrain, the
complementary areas A, B, C, and D will be each
represented on the negatives A', B', C', and D’
by distorted images indicated by dotted lines 23.
It is Well known that in order to produce a recti
ñed picture of the area 2|, or pictures of the areas
A, B, C, -and D, it is necessary to use a trans
forming printer, wherein the negative and the 55
sensitized member on which `the print is to be
made are disposed at predetermined angles so`
that the images projected onto the plane in which
the sensitized member is held will be of the
shape of the area a', b', c', or d' originally photo 60
graphed.
l
In Fig. ‘2 I’show a photograph A' which may
be the negative transparency indicated in Fig. 1
or may be a positive transparency directly print'
ed therefrom. This member A' is mounted on 65
a rotary head 23 in such position that light may
be projected therethrough and along a path indi-,
cated by dotted lines 24 to a lens 25 by which the
image is projected forwardly, :is indicated by
dotted lines 2E, to a plate or sheet of sensitized
material 2'? mounted on a rotary print holder 2l,
the members iii?, îiïi, and í'li
g disposed in the
proper angular
ticnship to; transforming the
image of the
aber fi’ in the printing thereof
on the sensitized member 21, If the member A’
2,130,798
shown in Fig. 2 carries a negative image, the
transformed print obtained on the sensitized
member 21 will be a positive print. . It is custom
ary in practice, however, to prepare positive
photographs by direct contact from the negative
taken from the aerial camera, so that the print
obtained on the sensitized member 2,1 will be a
negative print from which a positive direct print
is subsequently made. The transformer shown
10 in Fig. 2, and the succeeding ñgures, includes a
cast bed plate 29 having a table 3| formed at
the rearward end thereof in permanently fixed
relation, and having mounted thereon adjustable
tables 32 and 33 respectively supporting the ro
15 tary head 23 and an easel 34 carrying the lens 25.
As best shown in Figs. 2 and 3, the adjustable
tables 32 and 33 each have a horizontal wall 35
and oppositely disposed, downwardly projecting
Then, by rightward pressure against the project"
ing end 86 of the bar 32, such bar is moved right»
wardly against the force of the spring 53 so that
the rightward end of the ‘par 62 will move :into
lthe position indicated by dotted lines 11.
The
cap 1i .is then slipped over the rightward end 61
of the bar 62 and past the ends of the pin t6.,r
whereupon the 'cap 1i is rotated so as ‘to bring the
'depressions 69 into alignment with the ends of
"the pin 68, and, the pressure against the leftward 10
end 66 of the bar 62 is released so that the spring
59 will .force the bar 62 leftwardly and will trans
mit a leftward force throng the pin 68 and the
cap 1I tothe hub 14 of the rotary head 23 to hold
such rotary head against the shoulder 15.
The rotary head 23 has a number of openings`
16 therein corresponding 'to the number of photo
graphic plates to be transformed onto a single
side walls`36 at the edges of the horizontal wall print. in the present instance, where the in
Each table 32 or 33 is adjustable in all di# vention is being used with a four-coupled aerial
rections on the bed plate 29. For example, there j camera, there are four of such openings 18 evenly
spaced around the center of rotation of the
are vertical screws 31 threaded through the hori
zontal wall 35 and -having plates 36 at the lower rotary head 23 defined by the stub shaft 55. In
ends thereof for engaging the y,upper wall 39 of Fig. è E have shown the rotary head with one of
4the openings 13 exposed and with photograph 25
25 the bed plate 29, as shown in Fig. 3, and in the
supporting means 19 secured in operative rela
side walls 36~ there are side screws 4i for engag
ing `the side faces 42 of the bed plate 29. At the tion to other of the openings 18. As shown
forward and rearward ends of each table 32 and in Figs. 3 to 6 inclusive, each of the photograph.
33 are hold-down brackets 43 which are bolted supports has a base frame 3i consisting of four‘
to the upper wall 39 of the bed plate 29 by use side members i12 from which lips or shelves 33 36
of bolts 44. Each of the brackets 43 has a ver» project inwardly so that a photographic plate
tical wall 45 and an inwardly extending wall 46 34, or other image carrying transparency, may
projecting over a portion of the associated table he supported thereon, as shown in Fig. 6. To hold
32 or 33. In each of the vertical walls 45 there the photographic plates 84 in place in the base
35 are two adjusting screws 41 adapted to engage frame 8 i, cover frames 85 are provided which are
an edge of the table 32 or 33, and through each essentially the same sizeas the base frame 9i.
wall 46 there is a hold-down screw 48 adapted to "jachicover frame 85 carries an optical flat glass
3S having downwardly converging edge faces 8l
engage the table with which each bracket is asso»
ciated. Mounted on the upper face of the table engaging the frames S5 and 3l in the manner
shown in Fig. 6. 'ïhe lower face B8 of each glass
40 32, as shown in Fig. 3, there is a head supporting
may "near directly against the photographic
easel 43 having a base portion 5l which may be
plate at, or a piece of transparent material 83,
such as Celluloid, may be placed between the
prepared
vertical
extend studs
axis,
so that
by
53 byfwhich
using
the easel
slotsthe
52
may
easel
through
be 49
swung
iswhich
secured
on
20 ,35.
',30
face S8 and the upper face of the member 84 to
45
to thetable 32.
'The upper end of the easel 43 has a horizontal
bore 54 in which a forwardly projecting stub
shaft 55 is secured, which may be by use of a pin
56. ,The stub shaft 55 has an axial bore 51 with
50. a counterbore 56 at the rearward or ieftward end
thereof
position for
to engage
receiving
theahead
compression
6I of a bar
spring
62 which
59
prevent the face t3 from becoming scratched.
The glasses
are held in the cover frames 85
"ny means of small plates or clips 9i which are
secured by means of screws Q2 so as to project
over the edges oi the plates 3G.
The photograph supporting means 19 are ad
justabiy secured in place by means of lugs 93,
two
Eachofiug
which
has project
an opening
_fro-in each
3G» »therein
base frame
through
extends through the bore `51 and the counterbore
of considerabiy smaller diameter,
58 of the stub shaft 55. A plate 63 is secured by" _ “which a stud
may project from 'the face of the rotary head 23
55 and
screws
this
64 to
plate
the leftward
63 has an
end`opening
of the stub
65 shaft
through in the manner shown in Fig. 5. Each stud SLT
which an end 66 of the bar 62 projects. On the
forward or rightward end of the bar 62 there is a
transverse pin 68 adapted tov engage diametraliy
co
opposed depressions 69 in the front i’ace of a cap
1| having an opening 12 through which the end
61 of the bar"62 may pass, and likewise having
transverse notches 13 radiating from the opening
12 and being of such size that the ends of the pin
65 68 may pas/s therethrough when the cap 1i is
rotated through an angle vof 90° from the position
lnas a nut S5 threaded thereon, adapted to force
washer
a lug
downwardly against 'the upper face .
so as to clamp the lug 93 tightly
against the face of the rotary head 23. Prior to
the tightening of the nut 96, the photograph
holding means ‘i9 may be .adjusted on the face
of the rotary' head 2E within reasonable limits.
.As shown at the top and right-hand side of
Fig. fi, each base frame Si has lugs 98 projecting 65
outwardly therefrom to which leaf springs 99
in which it is shownso that the notches 13 are in ' are pivotally secured by such means as screws
70
alignment with the ends ofthe pin 66. 'I'he ro
tary head 23, which is essentially a circular disc,
llii, so that they may be swung outwardly as
shown. Each cover frame 35, as shown at the
has a hub 14 with a lbore 15 adapted to closely
fit the shaft 55. It is the function of the cap 1i
to hold the hub 14 against the shoulder 16 at the
upper end of ythe easel 43. With the cap 1i re~
moved from ther position in which it is shown, the
left-hand side of Fig. 4 and also in Figs. 5 and 6,
has lugs H22 projecting outwardly near the cor
ners thereof and in such positions that when the
75 rotary head 23 is placed upon the stub shaft 55;
leaf springs 99 are swung inwardly, the free ends
thereof may be rested upon the lugs S32 to apply
downwardly pressure to hold the -cover frames 85
2,180,793
member A', and the telescopes |35 of the jig may
be adjusted so as tobring the cross lines |53
thereof, which are projected kin dotted lines in
9, into- registration with the registration
marks |49; After being so adjusted, the tele
scopes |35 are locked in position, and thereafter
the adjusting of the supporting means 19 to bring
the ,photographic plates into proper position on
the rotary head 23 is accomplished by use of the
10 .jig` |03 which is consecutively placed over each
of the photograph holders, so that while the jig
A|03 isso placed the adjusting screws |22 and |25
5
it is shown in> full lines in Fig. 11 against the face
of the sensitized member 21, into a retracted'po
sition indicated by dotted lines |16. The mask
|14 has a plate portion |11 with a notch |18 at
the rightward side thereof, as viewed in Fig. 12.
To the edge walls |19 of the plate |11 forming
the notch |18, adjustable edge strips |8| are se
cured by means of screws |82, as shown in Fig. 14.
These edge strips |8| have accurately ground
knife edges |83 which, by adjustment of the edge 10
thereby are brought into register with the cross
`lines |53 of the telescopes of the jig |03.
When the rotary head 23 is mounted in opera
>strips |8|, may be caused to l'ie exactly on lines
diverging at an angle of 90°. With the knife
edges |83 disposed at an angle of exactly 90°, the
»mask |14 may be adjusted so that the point of
meeting of the inner ends of the knife edges |83 15
will coincide with the axis of rotation p of the
rotary member 28, which axis p will pass `through
the exact center of the print formed on the sen
tive position on the easel 49, as shown in Figs. 2
20 and 3, the registration or aligning openings ||3
member |83 is radially disposed at point p, so 20
may be operated to move the supporting means
19 in such direction or directions that the regis
.15 tration points on the photographic member held
of the ‘rotary head 23 are employed to position
the rotary head 23 so that the photographic plates
carrying the distorted images may be successively
brought into exact positions of cooperation with
25 the lens 25. For this purpose a bracket |54,
Figf’3, is mounted on the easel 49, this bracket
having a horizontal opening |55 through which
a pin |56 extends,'such pin |56 being movable
back and forth into and out of engagement with
80 the successive registration openings | I3 when the
rotary head 23 is rotated from one position to
sitized member 21.
A small saw cut |80 on the'
that a center cross will be formed on the trans
formation 21, and notches |90 on the member |83
provide registration marks on the transformation
by means of which principal point p may also be
located.
25
The mask |14 may be adjustedl in all directionsA
by use of the following means. A bracket |84
is secured to the lower part of the easel |59 in
forwardly extending relation, this bracket having
a threaded bore |85, Fig'. l2, centralized on a hori 30
zontal axis which is likewise parallel to the plane
defined by the front face of the rotary member
another.
As shown in Figs. 2, 1l, and 12, the rotary print 28.. Threaded into the bore |85 are laterally ad
holder 28 comprises a metal disc having a rear- ' justable sleeves |86 which serve as bearings for
35 wardly extending hub |51 which rotates in the
bore |58 of an easel or standard |59 having a base
plate |6| so that it may be secured to the table
3| ofthe base plate 29 by means of studs |62
and nuts |63. The sensitized sheet 21 which is to
form the transformed print may, in accordance
with the practice of the invention, be a sheet of
.sensitized photographic paper or may be a trans
parency with a sensitized photographic emulsion
thereon. In the present instance the member 21
is square and is to receive four complementary
images thereon, such images being disposed
around the center of the member 21 as defined by
the axis of rotation of the print supporting head
28. To hold the member 21 against the front face
50 of the member 28, a grille of crossing channels
|64 is provided,'such channels |64 being con
nected to a central opening |65, Fig. 11, which
projects within the hub |51 of the member 21
and communicates through radial openings |66
55 with a channel |61 formed in the bore |58, such
channel |61 being connected to an exhaust pump
through a tube |68. The tube |68 may be pro
vided with a suitable two-way valve |69 for con
trol of and release of rthe vacuum to be applied to
60 the4 channels |64 ofthe member 28.
, .
a shaft |81 having outwardly extending squared 35
ends |88 which support' legs |89 of a connector
plate |9| which is adjustably secured to the low
er portion of the‘plate |11 by means of screws |92
which pass through enlarged openings |93 in the
member |9|. Adjusting screws |94 are mounted 40
on opposite sides of a notch |95 in the member
|9|, through which notch |95 a lug |96 projects
from the plate |11. The legs |89 of the plate
|9| have bosses |91 at the lower ends thereof with
squared openings |98 therethrough, through 45
which the squared ends |88 of thegshaft |81 ex
tend.
Perpendicular adjustment screws |99 are
threaded through the walls of the` bosses |91
into engagement with plates 20| which fit against 50
the upper and lower faces of the squared shaft
ends |88, and end plates 202 having rectangular
openings 203 therein are fitted on the outer ends
of the squared shaft ends |88, these end plates
202 having horizontal adjusting screws 204 55
«adapted to bear against the opposing horizontal
faces of the squared shaft ends |88 in the man
ner best shown in Fig. 11. The end plates 202
have vertical slots 205 in the upper and lower
, portions thereof, which slots 2705 receive. horizon
_tal pins 206 which are projected outwardly from
thegeasel; |59. byqmeans of aabracket.,> |12, a; divid-y thebosses |91. Washers 201,and nuts 208 are
60
Bymeans of ,afregistrationpin |1|, carried on
inge‘of'tlie rotary,-print.lfiolder»Í 28 into, a desired yapplied to theouter ends of the ysquared, shaft
number l.of .divisions or seetionsvis" accomplished. , portions |88„and spacing plates or washers 209'
65 In the present,instancethenmember 28‘and'vthe fare disposed between the inner faces of the bosses 65
‘ sensitized;membertgfl’gsuppolgted thereby `,are to _` |91 and the endsof the sleeves |86,"as shown in
Fig. 12. The foregoing arrangement of parts
be ,divided int_c,>;.<i§ou,r` sections, which is accom
plished by@previdíriathefmemberè 28 with four»
may b'e`„employed~ to adjust the‘mask `|14 in any n '
eVenIyspaçed- registrationopenings‘. |13 `in posi-,y f desired direction so-as to bring the'point of meet--k
70
tionsto ,be consecutively engagedxby.r the leftward ing'of the knife edges> |834 into registration with 70
endet the l'pizimlm'llg asbestshown in Figli. A ¿ the axis p.
The imageprojected'by the lens v25 from the
mask »|.141is tprovided lto ycover. three lquarters, vof
the ksensitized memberzkandto, leave a quarter I photographic member,„such as A’ aligned there
section,„IM-1,5-` thereofy exposed.. `This mask „is
with,y will have a shape somewhat of the charac~ v
adaptedto berotated-fromthe position `in which . terindicated by ldotted lines2|| of Fig. 12. The
e
2,180,793
two inner edge portions of the image 211 will
'be cut off by the mask 114, and the Vouter edge
portions 212 of the image 211 will fall beyond
the edges 213 of the sensitized member 21. The
knife edges 183 accurately define the lines of
division or engagement of the complementary
images received by the sensitized member 21,
these images meeting accurately on the lines of
division Without overlapping or without unex
10
posed strips therebetween.
As indica-ted by dotted lines 214 in Fig. 2, a
light box or housing 214 is mounted behind the
rotary head 23 in alignment with the axis of the
l'ens 25 so that light will be produced behind the
photographic plate A', or` other photographic
plate aligned with the lens 25. The lamp hous
ing 214 carries a group of electric lamps adapted
to be individually adjusted. In the present
practice of the invention I employ six lamps L1
20 to Le inclusive as shown in Fig. 1'7 which may
be distributed within the light housing 214 in
a manner which may be readily determined by
experimentation. Each lamp has four adjust
able, separately and selectively used controls
25 which may be adjusted with respect to the four
photographic plates A', B', C', and D’ before the
sensitized member 21 is placed on the head 28.
To accomplish this control, I provide a control
panel 215 having four sections Si, Sz. S3, and S4
30 across ‘which conductors 216 extend from the
lamps L1 to Ls inclusive, the other sides of these
lamps being connected through conductors 211
with a common conductor 218 leading to a source
of electric current such as a generator 219. Each
35 section S1 to S4 inclusive has six rheostats R1
to Re inclusive, all being connected to a common
conductor 220 which leads to the generator 219,
and each rheostat R1 to Rs being connectable
through a switch 22| with a conductor 216 lead
40 ing to a corresponding lamp of the group of
lamps L1 to Le. There are six of the switches
221 in each section, and all of the switches 22|
of each group are adapted to be simultaneously
closed and opened so as to close electric circuits
45 including the lamps L1 to La inclusive and the
associated group of rheostats R1 to Re inclusive.
This is accomplished by the use of i‘our sole
noids 222 connected'by conductors 223 with a
common conductor 224 leading to the side of
the generator 219 to which the conductor 218
50
is attached, and being connectable through
manually operable switches 225 with the com
mon conductor 220. The selective operation of
the switches 225 accomplishes a selective bring
55 ing of the groups of rheostats in the sections S1
to S4 into circuits including the lamps L1 to Le
and the generator 219.
Four complementary photographic plates are
mounted on the rotary head 23, and the indi
60 vidual sections of rheostats are adjusted in ac
an especial feature of the invention to provide
means for precisely controlling the lighting of
the adjacent or matching edges of the comple
mentary images projected onto the sensitized
member
light measuring
21. This
device
I accomplish
226, Fig. by
15, the
which
use oper
of
ates in conjunction with means 221 for projecting
desired portions of the images projected by the
lens 21 to the light responsive and measuring
device 226.
It will be understood that the transforming
printer is preferably to be used in a dark room
and that portions thereof may be housed-in as
required to protect the sensitized member 21
from light other than the image projected there
on by the lens 25. As indicated by dotted lines in
Fig. 2, a wall 228 may be placed across the iront
of the easel 34 so that the lens structure 25 may
project therethrough. As shown in Fig. 15, the
light responsive device 226 >may be mounted on 20
the Wall 228 adjacent the forward end of the
lens 25, and the image projecting means 221
may be mounted on the wall 228 by means ol' a
bracket 229 so that it may be swung from a
retracted position indicated by dotted lines 231
into a position before the lens 25, as indicated
in full lines.
The member 221 has a front wall 232 carrynrO
a lens 233 adapted to be aligned with the objc@
tive lens 25, a diagonal wall 234 carrying a plane 30
reflecting mirror 235 which will project the image
from the lens 233 toward a lens system 236 car
ried by a side wall 231 of the device 221 in such
position that it will direct the image to a photo
electric cell 238 forming a part of the light re
sponsive means 226. The use of a photoelectric
cell for the measurement of light is old. Accord
ingly, the light responsive means 226 has been
shown diagrammatically. For the present pur
poses the light responsive means 226 is shown 40
with an ampere meter 239 adapte-d to be placed
at a point convenient to the operator of the
transforming printer and to be connected to the
remaining electrical parts of the device 226 by
means of conductors 241, this meter 239 having 45
an indicator 242 which moves in accordance with
the light received .by the photoelectric cell 238.
As shown in Fig. 16, the side wall 231 of the
device 221 has a mask 243 mounted thereon so as
to partly cover the area of the lens system 236. 50
This mask has two slots or openings 244 therein
through which the matching edge portions of the
images projected from the lens 25 may pass to the
lens system 236 under control of shutters 245 and
246 which are interconnected in such a manner 55
that when the shutter 246 closes the lower open
ing 244, the shutter 245 will expose the upper
opening 244 of the mask 243. The shutter 245
consists of a metal strip having its inner end 241
hinged on a pivot 248'which may be mounted on 60
cordance with the light requirements of each the mask 243. The rightward or outer end of the
photographic plate before _the sensitized member `shutter 245 has a slot 249 therein and a projecting
21 is mounted on the rotary support 28. Each handle 251 whereby the shutter may be raised and
section of rheostats Si to S4 is adjusted inde
lowered. The lower shutter 246 is mounted on a
pivot 252 disposed at its inner end and has a pin 85
65 pendently of the remaining sections and en
253 at its outer end which engages the slot 249
tirely in accordance with the strength and dis
tribution of light required by the photographic in the shutter 245. .When the shutter 245 is
raised, the engagement of the pin 253 with the
plate to which the section of rheostats corre
sponds in the operation of the transforming slot 249 Will raise the shutter 246 into closed
70 printer. In this manner such variations in position relative to the lower mask opening 244, 70
density existing in and between the photographic and as the shutter 245 is swung downwardly into
plates is compensated for, with the result that closed position relative to the upper mask open
ing 244, as indicated by dotted lines 254, the shut
a practical control of the densities of the com
plementary images obtained on the print formed ter 246 will be swung into lowered position, or
".15 from the sensitized member is attained. It is open relation to the lower mask opening 244, as 75
2,130,793
indicated by dotted lines 255. An auxiliary mask
256 is provided which may be swung on a pivot
251 from the open position _in which it is shown in
strips and half striœ the total illumination oi’
the strips is identical and the illumination of the
half strips is identical, thereby providing for
identical illumination along the matching lines.
It will be apparent that the lamps L1 to Le in
lines 258 wherein it will cover the inner halves of
clusive comprise a bank of lamps that, by virtue
both upper and lower mask openings 244.
As shown in the schematic Fig. 1, the portions of the control system indicated in Fig. 17, is
or images a', b', c', and d’ of the terrain which adjustable with respect to the pattern of inten
are projected photographically to the respective ,sity in cross-section oi' the light projected from
the bank, and that such a bank of lamps may
10 photographic plates A', B', C', and D' have over
lapping edge areas 259. 'I'he transformed images be adjusted for a beam pattern so related to the
which are projected from the photographic plates pattern of the light-transmitting character of
the photographic plate as to produce a desired
in the transforming printer and onto the sensi
full lines to closed position indicated by dotted
tized member 21 are of the same shape as the ‘ distribution of intensity over the image cast on
15 areas a', b', c', and d' of Fig. 1, as indicated by the printingmember. Thus, if it is desired to
the image 2H shown in dotted lines in Fig. 12. have an image of substantially uniform intensity,
With ’relation to the transformed images, and the bank of lamps will be adjusted to project a
likewise with relation to thebriginal images a',v beam having a cross-sectional pattern of light
b', c', and d', the mask openings 244 correspond
20 to the overlapping areas 259 at the edges of the
images. Accordingly, in preparation for the
printing of the complementary images on the sen
sitized member 21, each photographic plate, such
as the plate A' shown in Fig. 2, is moved into
25 printing position, and by use oi lights obtained
from the lamps L1 to La inclusive, the image
thereof is projected onto a sheet of paper carried
on the face of the rotary member 28. The rheo
stats R1 to Re in the control section correspond
30 ing to the photographic plate at this time in
alignment with the lens 25 are given an initial
adjustment while the intensity and distribution
of light on the paper carried by the rotary mem
ber 28 is visually checked. The member 221 may
35 be then swung from its retracted position shown
intensity substantially complementary to the pat
tern of the light-transmitting character of the
photographic plate. The required adjustment of
the projected light beam is possible because each
individual lamp of the bank projects its ‘own
beam and the beam from the bank as a whole is
a combination of these individual beams. With 25
the light measuring means described, it is con
veniently possible to measure the light intensity
rof selected portions of the image to determine
the particular pattern of light beam projected
from the bank of lamps that will be required to 30
give the desired effect at the printing member ci
the apparatus.
`
After adjustment of each of the sections S1 to
Si, inclusive, of the rheostats R, the sensitized
member 21 may be placed on the rotary member
28, and the complementary images carried by
in dotted lines 22| Íof Fig. 15 into full line posi
tion, andthe matching edge areas of the image
may be individually checked by use of the photo
electric cell 238. With the auxiliary mask 256 in
retracted position as shown in full lines in Fig.
16, the upper matching edge area o'f the projected
the photographic plates held on the rotary mem
ber 23 may be consecutively projected onto con
secutive portions of the sensitized member 21
while the mask 114 is in raised position as shown 40
in Figs. 2, 1l, and 12. This consecutive projec
image is permitted to pass through the upper
mask opening 244, whereupon the reading of the
tion of the images so that they will become con
secutively printed on the sensitized member 21
meter 239 is noted.
The handle 25| of the shut
45 ter 245 is then swung downwardly so that the
lower mask opening 244 will be opened and the
upper opening 244 closed, whereupon the quantity
of light constituting the lower matching edge
area of the image may be noted on the meter
50 239. If there is a discrepancy between these
readings, or., in other words, a deviation from a
isy accomplished by consecutively rotating the
head 23 and the print supporting member 28 45
from position to position, and using the differ
ent sections oi rheostats S1 to S4 with the re
spective photographic plates for which they have
been adjusted.
Although I have herein shown and described
my invention in simple and practical form, it
is recognized that certain parts or elements there
standard reading, the rheostats at this time con
nected with the lamps L1 to La inclusive may be of are representative of other parts, elements, or
readjusted to balance the light passed through mechanisms which may be used in substantiallj7
g >the same manner to accomplish substantially the
55 the upper and lower mask openings 2413.
Two like readings obtained through the upper same results; therefore, it is to be understood
and lower openings 244 and 245 of the mask 243, that the invention is now to be limited to the de
tails disclosed herein but is to be accorded the
with the auxiliary mask 256 in retracted posi
tion, indicate only that the quantities of light full scope of the following claims.
60 passed through the openings 244 are the same,
but do not show whether or not the light at the
inner end of an opening 244 may be stronger or
4„weaker than the light at the outer end of the
opening. To determine whether the light pass
ing through the inner and outer halves of the
_openings 244 is balanced, the auxiliary shutter
256 is moved into the position in which it is in
dicated in dotted lines 258, wherein the inner
halves of each oi the openings 244 are covered.
70 Light is then projected through the remaining
or outer portions oi.' the openings 244 by use of
the shutters 245 and 246 as previously described,
and the lights adjusted until the reading is the
same on both outer portions. At the conclusion
of the balancing of the complementary whole
I claim as my invention:
i. In a photographic printer for printing con
tiguous complementary images on a single light
sensitive member from a plurality of complemen
tary photographic members to produce a con
solidated print, the >combination of: supporting 65
means for said plurality of photographic mem
bers; supporting means for said light sensitive
member; a light source and an optical systemv
by which printing light can be transmitted suc
cessively through said photographic members
upon corresponding areas of said light sensitive
member; means for varying the intensity and
cross sectional pattern of said printing light to
compensate for varying densities of said photo~graphic members; a light intensity indicating
8
,
2,130,793
device positioned upon said printer, including an
element movable into and out of the path of said
light, for measuring the intensity of the light
transmitted through each individual photo
graphic member; and means for restricting the
light reaching said device to that transmitted
through selected areas of said individual photo
graphic member to indicate the variation of the
cross sectional pattern of said printing light
10 which will match the contiguous margins of the
individual images printed upon said light sensi
tive member when projected thereon, so that the
photographic members can be successively
printed upon said light sensitive member to pro
15 duce a print having substantially uniform
density.
images printed upon said light sensitive member
when projected thereon, so that the photographic
members can be successively printed upon said
light sensitive member to produce a print hav
ing substantially uniform density.
4. In a photographic printer for printing con
tiguous complementary images on a single light
sensitive member from a plurality' of complemen
tary photographic members to produce a con
solidated print, the combination of : supporting 10
means for said plurality of photographic mein
bers; supporting means for said light sensitive
member; and an optical system and a light
source including a plurality of lamps by which
printing iight can be transmitted successively 15
through said photographic members upon corre
2. In a photographic printer for printing con
tiguous complementary images on a single light
sensitive member from a plurality or" comple
sponding areas of said light sensitive member;
means for varying the energization of each of
mentary photographic members to produce a
consolidated print, the combination of: support
tional pattern of said light to compensate for 20
varying densities oi said photographic members;
a light intensity indicating device positioned up
said lamps to vary the intensity and cross sec
ing means for said plurality of photographic
members; supporting means for said light sen
sitive member; a light source and an optical
system by which printing light can be trans
on said printer, including an element movable
into and out of the path of said light, for meas
uring the intensity of the light transmitted 25
mitted successively through said photographic
through each individual photographic member;
members upon corresponding areas of said iight
vsensitive member; an individual control means
corresponding to each said photographic member
for varying the intensity and cross sectional
pattern of said light to compensate for varying
densities or" said photographic members; a light
intensity indicating device positioned upon said
printer,- including an element movable into and
out oi the path oi said light, for measuring the
intensity oi the light transmitted through each
individual photographic member; and means ior
restricting the light reaching said device to that
transmitted through selected areas of said indi
vidual photographic member to indicate the var
iation of the cross sectional pattern of said
printing light by the corresponding control means
which will match the contiguous margins of the
individual images printed upon said light sensi
tive member when projected thereon, so that the
photographic members can be successively
printed upon said light sensitive member to pro
duce a print having substantially uniform
density.
3. In a photographic printer` íor printing con
tiguous complementary images on a single light
sensitive member from a plurality or" comple
mentary photographic members to produce a con-1
solidated print, the combination oi: supporting
55 means for said plurality of photographic mem
bers; supporting means for said light sensitive
member; a light source and an optical system by
„which printing light canbe transmitted succes
sively through said photographic members upon
corrresponding areas of said light sensitive memu
and meancx i’or restricting the light reaching
said device to that transmitted through selected
areas of said‘individual photographic member to
indicate the variation oí the cross sectional pat
ternv or? said printing light which will match the
contiguous margins oi the individual images
printed upon said light sensitive member when
projected thereon, so that the photographic
members can be successively printed upon said 35
light sensitive member to produce a print hav-
ing substantially uniform density.
5. In a photographic printer :for printing con
tiguous complementary images on a single iight
sensitive member from a plurality or” complemen 40
tary photographic members to produce a con
solidated print, the combination oi: supporting
means `ior said plurality oi photographic mem
bers, supporting means for 'said light sensitive
member; a light source and an optical system by
which printing light can he transmitted succesu
sii/ely through said photographic members upon
corresponding areas of said light sensitive mem
ber; a presettable control means corresponding
to each ksaid photographic member i’or varying 50
the intensity and cross sectional pattern oií said
iight to compensate for varying densities of said
photographic member; a light intensity indicat
ing device positioned upon said printer, in
cluding an element movable into and outA or the
iight path, for measuring the intensity of the
light transmitted through each individual photo»
graphic
member;
and means for restricting
_
the iight reaching said device to that transmitted
through selected areas of said individual photo
ber; means for varying the intensity and cross ' graphic member to indicate which setting oí the
sectional pattern of said light to compensate i'or corresponding control means will vary the cross
varying densities of said photographic members; sectional pattern oi said printing light to match
a light intensity indicating device positioned up
the contiguous margins of the individual images
on said printer, including an element movable
into and outof the path of said light, for meas
uring the inœnsity of the light transmitted
through each individual photographic member;
- and mask means movable into and- out or the
70 light path for restricting the light reaching said
device to that transmitted through selected inar
ginal areas of said individual photographic mem
ber to indicate the variation of the cross sec
tional pattern of said printing light which will*
match the contiguous margins of the 'individual
printed upon said light sensitive member when 65
projected thereon, so that said control. means can
be preset and successively operated and the cor
responding ;photographic members successively
printed upon said light sensitive member to pro
duce a print having substantially uniform den
sity.
70
6. In a photographic printer for printing con
tiguous complementary images on a single light
sensitive member from a plurality of comple
mentary photographic members to produce a 75
9
2,180,798
consolidated print, the combination of: support
ing means for said plurality of photographic
members; supporting means for said light sensi
tive member; and an optical system and a light
source including a plurality of lamps by which
printing light >can be transmitted successively
through said photographic members upon cor
responding areas of said light sensitive member;
presettable control means corresponding to each
10 photographic member for varying the energiza
tion of each of said lamps to vary the intensity
and cross sectional pattern of said light to com
pensate for varying densities of said photographic
members; a light intensity indicating device, in
15 cluding an element movable into and out of the
path of said light, for measuring the intensity
of the light transmitted through each individual
photographic member; and means for restricting
the light reaching said device to that trans
mitted through selected areas oi said individual
photographic member to indicate which setting
oi' said control means will vary the cross sec
tional pattern of said printing light to match the
contiguous margins of the individual images
25 printed upon said light sensitive member when
projected thereon, so that the control means can
be preset and successively operated and the cor
responding photographic members successively
printed upon said light sensitive member to pro
30 duce a print having substantially uniform den
consolidated print, the combination of: support
ing means for said plurality of photographic
members; supporting means for said light sensi
tive member; an optical system and a light source
including a plurality of lamps by which printing
light can be transmitted successively through
said photographic members upon corresponding
areas of said light sensitive member; presettable
control means corresponding to each said photo
graphic member, each control means including
a presettable means for each of said lamps for
varying the energization of each of said lamps
to vary the intensity and cross jsectional pattern
of said light to compensate for varying den
sities of said photographic members; a. light in 15
tensity indicating device positioned upon said
printer, including an element movable into and
out of the path of said light, for measuring the
intensity of the light transmitted through each
individual photographic member; and mask 20
means for restricting the light reaching said de
vice to that transmitted through selected areas
oi' said individual photographic member to in
dicate which setting of the resistors of each
control means- will vary the cross sectional pat 25
tern of said printing light to match the con
tiguous margins of the individual images printed
upon said light sensitive member when projected
thereon, so that the control means can be pre
set and successively operated and the correspond 30
sity.
ing photographic members successively printed
7. In a photographic printer for printing con
tiguous complementary images on a single light
upon said light sensitive member to produce a
sensitive _member from a plurailty of comple
35 mentary photographic members to produce a
print having substantially uniform density.
LEON T. ELIEL.
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