New or Improved Means for Setting or Cooling Photographio Emulsions on Glass or other Suitable Materials Used as а Support for Photographic Emulsions.
Year: 1887

page_text: Date of Application, 10th Oct., 1887
Complete Specification Left, 10th July, 1888
Complete Specification Accepted, 10th Aug., 1888
New or Improved Means for Setting or Cooling Photographio
Emulsions on Glass or other Suitable Materials Used as а
Support for Photographic Emulsions.
JAMES WILLIAM THOMAS CADETT Photographic Chemist Greville Works Ashtead
Surrey do hereby declare the nature of this invention to be as follows:-
'
My invention has for its object the setting or cooling of Photographic Emulsions
on the surface or surfaces used as a support for Photographic Emulsions by new or
improved means in which the application is made of cold water or other suitable fluid
to the under or opposite side of the glass or other materials used as a support for
Photographic emulsions to that side or surface on which the Photographic Emulsion
is placed that is to say the cold water or other suitable fluid is applied to that side or
surface opposite to the side or surface on which the Photographic Emulsion is
placed.
For clearness and brevity I will hereinafter designate Photographic Emulsions or
Emulsion as " Emulsion." Glass or other suitable materials used as a support for
Photographic Emulsions as "plates."
Cold water or other suitable fluid as "Water."
I am aware that a method has been described in which an endless band is made to
dip its lower portion in cold water so as in travelling to bring up what water it can
soak to the upper side of the slab or table on which the said band is made to travel
but this method I found does not give the best effect owing to the want of sufficient
water being taken up the result being that the best cooling or setting effect is not
obtained moreover there is not sufficient water for lubrication where a cloth band is
used on a flat slab or surface the result being that the band is troublesome to
move.
In the case where a band or bands is or are used to carry the "plates," if the
material or materials of which the band or bands is or are made be of sufficiently
porous nature I prefer to apply the "Water" by a trough or troughs, slotted tube or
tubes, or a tube or tubes with holes in same, or a channel or channels so placed as to
deliver the "Water" between the slab or surface on which the band is made to
travel and the band itself 50 that the "Water" can pass through the porous material
of the band and so come in contact with the "plates."

page_text: In case where the band is not sufficiently porous the "Water" can be applied to the
band preferably at the part of the band where the band passes over the roller or
surface just before coming to the level on which the band meets the "plates" so as
to bring the "Water" in sufficient quantity between the "plates" and the band the
"Water" can also be in this case applied to the upper surface of the band or the
same side as on which the "plates" rest or are carried. "Water" can also be applied
to both sides of the upper or carrying portion of the band if required. The " water
being applied by a trough or troughs, or slotted tube or tubes, or a tube or tubes with
holes in same, or a tube or tubes or channel or channels or any other or well known
means of applying water.
"
دو
In cases where the "plates" are carried by cords or narrow bands or chains or
edges or other suitable surfaces where a band is not used the "Water can be applied
by a trough or troughs the level of the "Water" being kept at such a height as to
have contact with the "plates." In cases where the "plates" are set or cooled on a
Water can be delivered along the grooves so as to
have proper contact with the "plates."
grooved slab or surface the "
more easily let the "Water
"2
22
Dated this 10th day of October 1887

page_text: New or Improved Means for Setting or Cooling Photographio
Emulsions on Glass or other Suitable Materials Used as a
Support for Photographic Emulsions.
I, JAMES WILLIAM THOMAS CADETT Photographic Chemist Greville Works
Ashtead Surrey do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
The object of this invention is to readily and effectually cool and set photographic
emulsions when placed on glass or other suitable surfaces by the active application
of cold water in jets or streams either to the undersides of such surfaces, and to
the bands or other carrying arrangements whereon such surfaces travel, or
to both whereby I ensure the proper cooling and setting of the emulsion or
emulsions.
Hitherto such operation has been effected by the passive application of cold water
to the bands which have been caused to pass through a tank of cold water placed
beneath the slab or table of a photographic emulsion setting table. The disadvantage
of this method however is that the quantity of water taken up by the bands in
passing through such tank is inadequate to sufficiently lubricate the bands and to chill
the plates or other equivalent surfaces so as to ensure the proper cooling and setting
of the emulsion thereon.
This disadvantage I effectually obviate by my invention which consists in applying
cold water to the underside of the plates or other surfaces which are coated with the
emulsion and to the bands or other carrying arrangements whereon such plates or
surfaces travel or to both the plates or other surfaces and the bands or other
carrying arrangements through one or more perforated or slotted tubes or pipes which
are fitted to or in close proximity to the slab or table of the setting table in any
convenient manner and whereby the water is thrown on to such plates and bands or
their equivalents in jets or streams of sufficient force and quantity to ensure perfect
lubrication and the proper cooling and setting of the emulsion thereon. Or the slab
or table itself may be perforated and have one or more tubes or jets fitted therein
through which the water can be delivered on to the bands and plates or their
equivalents. Such tubes or jets are connected to the water main or to any other
convenient and suitable water supply so that a proper and ample supply can be
obtained.
Preferably the bands are made of any suitable porous fabric or material which will
readily allow the water to pass through. If however the bands be made of a denser
and consequently less porous material I inject the water on to the band at a point
where it passes over the roller so as to ensure its proper lubrication by bringing a
sufficient quantity of water between the underside of the plates or other equivalent
surfaces and the band. When the bands are made of a material that is impervious
to water 1 apply water to both sides of the band to ensure its proper lubrication...

page_text: In lieu of the perforated or slotted tubes or pipes above mentioned I may form
suitable grooves or channels in the face of the slab or table over which the plates or
other equivalent surfaces are moved and fill or flood such grooves or channels with
water which is conveyed thereto by means of pipes or tubes connected with any
suitable water supply so that the undersides of the plates or their equivalent 5
surfaces and the bands whereon the same are carried come in contact with the cold
water contained in such grooves or channels thus chilling the plates or other equivalent
surfaces. This modification of my invention is more particularly applicable where the
plates or other equivalent surfaces are carried by cords or narrow bands or chains or
edges or are moved forward' by hand.
Or I may use a grooved or channelled slab or table such as that hereinbefore
described in combination with one or more delivery tubes or pipes or nozzles as
herein before mentioned so as to obtain a more copious supply of water and thus flood
both the bands and likewise the undersides of the. plates or other equivalent surfaces.
thereby securing increased lubrication of the bands and a more spoedy chilling of the 1
plates or other equivalent surfaces.
DRAWINGS.
Fig. 1 shews. a view in sectional elevation of one form of my invention B is an
endless band travelling over rollers R in the direction indicated by the arrows-Sis.
a slab or table over which such band passes-P are the plates or other equivalent
surfaces resting on the endless band-G is a groove or channel in the slab or
table preferably made at the rear end thereof where the endless band first
comes in contact therewith and fitted with a perforated or slotted delivery tube or
pipe T.
One or both ends of this delivery pipe is or are connected to a suitable water supply
in any well known manner-J1 J2 J3 are jets which can be arranged so as to deliver
the water either on to the endless band or between the same and the underside of the
plates or other equivalent surfaces.
In practice I find that a single delivery tube or pipe T is quite sufficient for the
purposes of my invention but it is obvious that several delivery pipes and also several
grooves or channels such as G may be employed if desired.
In the drawing Fig. 1-the supports for the table or slab S and for the rollers Rare
not shewn as they may be made in any well known manner.
Fig. 2 shews a plan of the slab or table S with the perforated delivery tube or
pipe the perforations therein being indicated by the letters W. Fig. 3 shews a
detail view of a slotted tube or pipe instead of a perforated one. Fig. 4
illustrates a modification of my invention wherein water is delivered on to the
endless band B through jets or pipes J which are connected to any suitable cold water
supply.
Fig. 5 illustrates a further modification of my invention wherein the plates P travel
over a slab or table furnished with grooves or channels G which are filled or flooded
with water by pipes O or their equivalents connected with any suitable water supply
so as to cool and chill the plates P.
In every case the surplus or waste water can flow over the sides of the table or
slab S and be carried away by a waste pipe or any other suitable and ordinary.
mieans.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
· 1. Delivering cold water in jets or streams on to the bands or other carrying
arrangements of a photographic emulsion setting table and likewise on to the undersides
of the plates or other equivalent surfaces when coated with photographic emulsion for
the purpose of lubricating such bands or other carrying arrangements and of chilling
such plates or other equivalent surfaces all substantially in the manner herein before
described and. shewn....
:.

page_text: 2. Employing one or more perforated or slotted delivery tubes or pipes fitted in
any convenient manner to or around the slab or table of a photographic emulsion
setting table so as to deliver cold water in jets or streams thereon on to the bands or
other carrying arrangements thereof and also on to the undersides of the photographic
plates or other equivalent surfaces all substantially in the manner and for the purposes
herein before described and shewn.
3. Fitting one or more delivery tubes or pipes or nozzles beneath the slab or table
of a photographic emulsion setting table so as to deliver the water in jets or streams on
to the band or bands or other carrying arrangements of the machine all substantially
in the manner hereinbefore described and shewn.
4. Forming one or more grooves or channels in the slab or table of a photographic
emulsion setting table and fitting the same with delivery pipes or tubes for supplying
water thereto all substantially as hereinbefore described and shewn.
5. Forming one or more grooves or channels in the slab or plate of a photographic
setting table and fitting each such groove or channel with a perforated or slotted
delivery tube or pipe all substantially as herein before described & shewn.
6. The combination in a photographic emulsion setting table of one or more
suitable delivery pipes or tubes with a slab or table having suitable grooves or channels
formed therein for flooding the bands or other carrying apparatus and also
the undersides of the photographic plates or other equivalent surfaces so as
to chill the same all substantially in the manner and for the purposes hereinbefore
described.
Dated this 10th day of July 1888.
ELT & Co.,
33, Southampton Buildings, Holborn, London,
Agents for the Applicant.