close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2405160

код для вставки
Aug. 6, 1946. .
J, F, MORSE’
2,405,160
PHOTOGRAPHIC DEVELOPING TANK
Filed March 27, 1943
dOHN F. MORSE
Patented Aug. 6, 1946
2,405,160
UNITED STATES PATENT OFFICE
2,405,160
PHOTOGRAPHIC DEVELOPING TANK
John F. Morse, Hudson, Ohio
Application March 27, 1943, Serial No. 480,865
5 Claims. (01. 95-90)
2
The present invention relates to apparatus for
holder is spaced above the ?oor of the tank. The
holder is of slightly smaller external dimension
than the internal dimension of the tank and in
order to insure that the holder is spaced all
around from the walls of the tank, the holder
use in the development of photographic ?lms or
plates, it being the object of the invention to
perfect a form of apparatus which may be used
for the development of negatives in daylight,
thereby dispensing with the usual practice of
may be provided with projections, here illustrated
carrying out such operations in a dark room.
It is one of the purposes of the invention. to de
sign a form of light-proof holder or container
which can be manipulated so that negatives may
be developed, ?xed and washed without the ne
as vertical ribs 4 located at intervals about the
exterior of the holder.
The base of the holder is provided with a
plurality of lattice-like grids, here shown as four
in number and indicated by the numeral 5. As
cessity of opening the holder. The holder may
shown
each grid is formed of a plurality of in
be placed successively in the several baths neces
clined
louvers
or bars 6, which in the adjacent
sary for the development of the ?lm, so that
from the time the ?lm is placed inside of the 15 grids are inclined in opposite- directions and
overlapped so that the multiplicity of grids form
holder it is not removed or exposed until the
an effective light seal closing in the bottom of
development is completed.
the holder. These grids are held in place against
lugs 1 formed internally of the holder above its
It is a further object of the invention to pro
vide a self-contained, light-proof holder which
may be supported on the rim of a tank for hold
ing the treating solution and which will drain
quickly and rapidly so that the holder is effective
ly emptied and the holder may be immediately
transferred to a second tank for further treat
ment. The holder is so designed that, by rais 25
ing and lowering it while in the solution, the
liquid within the holder may be thoroughly
agitated.
These and other objects will be realized by the
lower edge by a series of bolts 8 and the group of
grids is fastened together as a unit by a central
screw 9. Except at lugs formed where the fas
tening means are located, the grids are spaced 7
apart to prevent any trapping of the solutions
between contacting surfaces of the grids. This
is shown in the sectional area of the grids in
Fig. 2.
It will be seen that while the grid construction
eifectively battles all light rays so that no light
may enter through the bottom of the holder, the
invention, the best-known and preferred form of 30 inclined surfaces of the louvers permit the liquid
which is shown and described herein, it beingr
bath to drain freely and quickly from the bottom
understood that the invention is not limited to
of the holder. Also when it is desired to agitate
the details of construction illustrated but may
the bath the holder may be raised and lowered
be varied and modi?ed within the scope of the
35 in the bath and the bath will surge freely into
invention as set forth in the appended claims.
and out of the holder and around the negatives.
In the drawing in which the best-known form
The grid work provides a multiplicity of vertically
of the invention is illustrated:
'
arranged circuitous passages which allow quick
Fig. 1 is a plan view of the complete develop
drainage of the holder.
'
ing assembly, a portion of the top of the holder
The negatives are mounted in frames i2 sus
being broken away to disclose the interior con 40 pended within the holder by lateral arms I3
struction;
.
which rest upon the upper side of the wings 3.
Fig. 2 is a vertical section on the line 2-2 of
A holder is constructed to support as many of
Fig. 1;
Fig. 3 is a detailed section on the line 3-3 of 45
Fig. 1; and
Fig. 4 is a section on the line 4-4 of Fig. 3.
In the drawing the tank for holding the bath
is indicated by the numeral I. This tank may
these frames as may be desirable.
The upper edge of the holder is formed with
a surrounding upright ?ange IS, on which the
opaque cover I6 is seated.
The cover is formed
with a depending ?ange 18 which surrounds the
?ange I5 and with an interior wall l9 which ?ts
hold either the developing solution, the ?xing 50 loosely on the inside of the ?ange [5. This ar
solution, or water for washing the negatives.
rangement provides a light seal around the top
The holder is indicated at 2. It is composed of
of
the tank, but in order to permit air to ?ow
an opaque body portion la and two laterally ex
into and out of the holder the outer wall and top
tending wings 3 designed to rest upon the upper
edge of the tank I, so that the lower edge of the 55 of the ?ange I 5 are formed with a plurality of
spacing projections, here shown as ribs 20. This
2,405,160
3
bottom of the holder for permitting fluid to enter
arrangement facilitates the free flow of air into
and drain from the interior of the holder, said
and out of the holder around the edge of the
last named passages being formed by a plurality
cover while the liquid is running into or draining
of grids having oppositely directed inclined
louvers in each grid overlapping the passages in
from the holder.
Two sliding metal clips or fasteners 22 are 6 an adjacent grid.
mounted on the top of the cover, being held in
3. An apparatus for daylight development of
position by the plate 23. A downwardly and
negatives comprising a tank, a negative holder,
laterally extending wing 25 on each clip is de
said holder having an opaque body portion and
signed to seat in a recess 26 on the under side ll) an opaque removable cover, lateral Wings on the
of the wing 3 when the fasteners are'moved into
holder adapted to seat on the upper walls of the
locking position.
In Fig. 2 one of the clips is
shown in engagement with the underside of the
wing 3 while the other is free.
In using this device the undeveloped negatives
are 1oaded in the frames 52 and the frames placed
within the holder in the dark room, the cover
applied and locked in place. The interior of the
holder is now light-proof and the holder is then
taken out of the dark room and placed in the
tank containing the developing solution, which
runs freely into the interior of the holder through
the grids 5. The operator may, by holding the
wings 3, raise and lower the holder while in
the tank and pump the developing solution into
and out of the holder. As the holder extends
above the upper rim of the tank he does not get
his hands into the solution. When time for de
velopment has passed the holder is lifted from
the developing tank, and permitted to drain,
tank to support the holder therein, negative hold~
ing frames within the holder having arms rest
ing upon the inner surfaces of the Wings, cir
cuitous light-excluding air passages around the
edge of the cover, and light-excluding passages
at the bottom of the holder for permitting ?uid
to enter and drain from the interior of the holder,
said last named passages being formed by a plu
rality of grids having oppositely directed inclined
louvers in each grid overlapping the passages in
an adjacent grid.
4. An apparatus for the daylight development
of negatives comprising an open top tank con
taining a treating solution, and a light-proof
negative holder comprising four opaque walls,
two opposite walls being provided at the top of
the holder with lateral wings adapted to rest
upon the upper edge of the tank and to provide
interior bays upon which a negative frame may
which it does immediately due to the arrange
ment of the grids at the bottom of the holder.
The holder is then moved to a washing tank,
to the ?xing tank I and then to the final washing
be supported with its contents within the holder,
an upstanding wall around the top of the nega
tank. The developing process is now completed, ,
the cover removed and the negative frames re~ ‘
rim about its edge, said rim having a tongue and
tive holder, an opaque cover over the negative
holder, said cover having a downwardly turned
groove engagement with the upstanding wall,
spacing means in the tongue and groove engage
ment to provide a light-sealing air passage be
ations, as will be seen, may be performed out of
tween the cover and the negative holder, and a
the dark room. The operations are therefore
dark . ; grid at the base of said negative holder, said
more rapid and ef?cient than with the oldera prac~
moved for drying. All of the developing oper
grid being provided with a multiplicity of cir
cuitous vertical passages to permit the free cir
culation of the treating solution into and out of
What is claimed is:
the negative holder as the negative holder is
1. An apparatus for use in the development of
negatives comprising an open-top tank for con. 45 raised and lowered into the tank.
5. An apparatus for the daylight development
taining a developing solution, a holder for the
of negatives comprising an open top tank con
negatives, said holder loosely ?tting the interior
taining a treating solution, and a light-proof
of the tank and having lateral wings the under
negative holder comprising four opaque walls,
side of which rest upon the walls of the tank so
that the holder is suspended therein, a negative 60 two opposite walls being provided at the top of
the holder with lateral wings adapted to rest
holding frame having lateral projections which
upon the upper edge of the tank and to provide
rest upon the ledges formed by the upper sides
tice of performing all the operations in
room.
of the wings, and passages at the bottom of the
interior bays upon which a negative frame may
be supported with its contents within the holder,
holder for permitting the liquid therein to pass
an upstanding wall around the top of the negative
into the interior of the holder, but to exclude
holder, an opaque cover over the negative holder,
light therefrom, and air vents at the top of the
said cover having a downwardly turned rim about
holder arranged to exclude light.
its edge, said rim having a tongue and groove
2. An apparatus for daylight development of
engagement with the upstanding wall, spacing
negatives comprising a tank, a negative holder,
said holder having an opaque body portion and 60 means in the tongue and groove engagement to
provide a light-sealing air passage between the
an opaque removable cover, lateral wings on the
cover and the negative holder, and a grid at the
holder adapted to seat on the upper walls of
base
of said negative holder, said grid being pro
the tank to support the holder therein, and nega
‘Vided with a multiplicity of circuitous light ex
tive holding frames within the holder having
arms resting upon the inner surfaces of the 65 cluding passages formed by superposed tiers of
reversely arranged inclined walls.
wings, light-excluding air passages at the top of
JOHN F. MORSE.
the tank, and light-excluding passages at the
Документ
Категория
Без категории
Просмотров
0
Размер файла
355 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа