IMPROVEMENTS IN APPARATUS FOR COATING AND DRYING PLATES FOR USE IN PHOTOGRAPHY
Year: 1885

page_text: I ARTHUR COVENTRY of the Polygon Eccles in the County of Lancaster Engineer
do hereby declare the nature of my invention for IMPROVEMENTS IN APPARATUS
FOR COATING AND DRYING PLATES FOR USE IN PHOTOGRAPHY to be as follows:-
My invention relates to apparatus used in preparing such plates used in photo-
graphy as are ordinarily known as dry plates and consists in apparatus by means
of which I spread the emulsion upon the plates of glass to which it is to be applied
and in arrangements of apparatus for drying the plates after the application thereto
of the emulsion.
In carrying the first part of my invention into effect I employ a number of
boards or trays each of which boards or trays is provided with raised ledges or
bars between which ledges or bars the plates of glass to be coated with emulsion
are placed.
In order to apply the emulsion to the plates of glass to which it is to be applied
I employ a frame or carriage provided with wheels the peripheries of which are
preferably covered with india-rubber. I provide the frame or carriage above
mentioned with a handle which handle is connected by suitable gearing and shafts
with the wheels above referred to. I also provide the frane or carriage above
mentioned with projections which acting along with the ledges or bars above
referred to serve to keep the said frame or carriage in position while such carriage
is being traversed longitudinally upon the boards or trays above mentioned―
I furnish the frame or carriage above referred to with a trough in which trough is
placed the emulsion to be applied to the above mentioned plates of glass-I support
the trough above mentioned upon a pivot or pivots so that when the said trough is
tilted in one direction such trough will act as a receptacle to hold the emulsion but
when such trough is tilted in an opposite direction the emulsion will be allowed to
escape through a slit formed through one side of the trough aforesaid-In order to
apply the emulsion to the plates of glass to which such emulsion is to be applied
1 place the said plates of glass upon one of the boards or trays above mentioned and
place the frame or carriage and trough above referred to upon the raised ledges or
bars above mentioned and charge the trough aforesaid with a supply of emulsion
the said trough being in such position that the emulsion will have no tendency to
flow therefrom-I then by turning the handle above mentioned cause the frame or

page_text: carriage above referred to, to travel over the plates of glass to be coated with the
emulsion-In some cases instead of rotating the wheels above referred to by hand
I propose to rotate such wheels by means of clockwork. I also propose in some
cases to traverse the frame or carriage above referred to longitudinally upon the
boards or trays before mentioned by means of cord or other suitable means by t
means of which cord or other suitable means I connect the frame or carriage above
mentioned to an axle rotated at an uniform speed by band, by clockwork, or by
any other suitable means.
As soon as the frame or carriage above mentioned, commences to move I tilt the
trough above referred to into such position that the emulsion contained in the said
trough will flow out upon the upper surfaces of the plates of glass to be coated
with such emulsion.-When the frame or carriage above mentioned arrives at or
about the end of the board or tray opposite to the end from which it started
I tilt the trough above mentioned to prevent the flow of emulsion therefrom and
arrest the motion of the frame or carriage above referred to.
In order to cause the emulsion to.issue at an uniform speed from the slot formed
in the trough above referred to I employ a vessel in which is placed a quantity
of emulsion, a portion of which quantity of emulsion I allow to flow into the trough
above mentioned at such times as the said trough is being traversed along the
plates of glass above referred to for the purpose of coating such plates of glass
with the said emulsion. I control the flow of the said emulsion by means of any
suitable valve which valve I operate by hand so as to permit the flow of the
emulsion from the vessel above referred to when required or I employ a cam or
other similar apparatus which when the frame or carriage above mentioned is
traversed over the upper surfaces of the plates of glass for the purpose of coating
such plates of glass with the emulsion acts upon a lever jointed to the valve above
mentioned so as to permit the emulsion to flow from the vessel above referred to,
into the trough above mentioned when required.
In some cases I retain the valve above mentioned in position for permitting the
flow of emulsion by a stop or trigger which is provided with an adjustable part by
which the flow of the emulsion from the vessel above mentioned may be regulated.
I further propose in some cases to provide the above mentioned vessel containing
the quantity of emulsion and the trough above referred to or either of them with
a jacket or casing for containing heated water for the purpose of keeping the
emulsion in the proper condition for flowing on to the plates of glass to be coated
with the emulsion-Instead of tilting the trough above referred to which contains
the emulsion as above described I propose in some cases to provide the said trough
with a slide or valve by means of which the emulsion may be allowed to How
through the slit above referred to when required and by means of which slide or
valve the flow of the emulsion may be controlled or arrested. When I have treated
the series of plates of glass upon one of the above mentioned boards or trays as
above described I remove the frame or carriage above referred to and place another
of the boards or trays above mentioned upon that above referred to the ledges or
bars upon which prevent the back or underside of the upper board or tray from
coming in contact with the emulsion upon the plates of glass upon the lower board
or tray and also preserve a space through which as will be hereinafter described
I cause air to pass for a purpose to be hereinafter described-1 then coat the plates
of glass upon the second board or tray in a manner similar to that above described
and again proceed as above described until I have coated as many plates of glass
with emulsion as may be desired.
By the employment of the apparatus above described plates of glass may be
readily coated with an even and uniform coating of emulsion.
A further part of my invention consists in arrangements of apparatus for drying
the coating of emulsion upon the plates of glass to which such emulsion is applied-
When I have coated as many plates of glass as may be desired I enclose the boards
or trays aforesaid within a case or cover the sides, ends bottom and top, of which
case or cover are connected by hinges or otherwise so that the said case or cover
Γ

page_text: may be readily placed upon or removed from around the boards or trays above
mentioned and which case or cover when placed around the said boards or trays
will prevent the access of light to the emulsion upon the plates of glass above
mentioned-In order to dry the emulsion after it has been applied to the above
mentioned plates of glass I place the interior of the case or cover previously
mentioned in communication with a chimney or other suitable appliance or
apparatus by which air may be caused to pass over the surface of the emulsion
upon the plates of glass so as to dry such emulsion for which purpose I cause the
air to enter at one end of the case or cover above described and escape at the other
end thereof and in order that the air may pass over each row of the plates of glass
above mentioned I contract the area of the end of each of the spaces between the
surfaces of the plates of glass upon which the emulsion has been spread and the
bottom of the board or tray placed over such plates of glass aforesaid so that
the combined area of the ends of the air spaces or channels will not exceed that
of the chimney employed to produce the current of air which chimney is placed
in communication with a flue or other suitable appliance or apparatus by which
the said current of air is maintained.
W. T. CHEETHAM,
Agent to the Applicant.
improvements in Apparatus for Coating and Drying Plates
for Use in Photography.
I ARTHUR COVENTRY of The Polygon, Eccles in the County of Lancaster
Engineer do hereby declare the nature of my invention for IMPROVEMENTS IN
APPARATUS FOR COATING AND DRYING PLATES FOR USE IN PHOTOGRAPHY and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
My invention relates to apparatus used in preparing such plates used in photo-
graphy as are ordinarily known as dry plates and consists in apparatus by means
of which I spread the emulsion upon the plates of glass to which it is to be
applied and in arrangements of apparatus for drying the plates after the application
thereto of the emulsion.
In order that my invention may be thoroughly understood and readily carried
into effect I will describe the same with reference to the drawings hereunto annexed
in which drawings I shall apply the same letters of reference to corresponding
parts throughout the whole series of figures. As the various figures of the drawings
are drawn to different scales I append scales to the said drawings.
.

page_text: In carrying the first part of my invention into effect I employ a number of
boards or trays one of which is shown in plan in Fig. 1. Each of the boards or
trays a is provided with raised ledges or bars b, b³ ³ between which ledges or
bars b, b b and resting upon the parts b¹ of the board or tray a, the plates of glass
to be coated with emulsion are placed, one end of the series of plates of glass being
placed against the stop c. after which a block d is advanced by a screw e to retain
the plates of glass in position upon the board or tray a.
In order to apply the emulsion to the plates of glass to which it is to be applied
I employ the apparatus shown in Figs. 2 and 3 in which Fig. 2 is a vertical
longitudinal section and Fig. 3 an end view partly in section of the apparatus. In
Figs. 2 and 3 ff' are side frames connected by cross pieces ghh. To the side
frames ff are secured studs j. j¹ upon which studs j. j¹ are mounted the wheels k. k³
respectively. The peripheries of the wheels kk' are preferably covered with india-
rubber. The parts f f g. h. h and wheels k k¹ constitute a carriage which may at
times as will be hereinafter described be traversed along the board or tray a and
which I shall hereinafter refer to as the carriage A. In order to keep the
carriage A in position upon the board or tray a while being traversed longitudinally
upon such board or tray a I form a projecting rib f upon the side-frame f¹ and
projecting parts f³ f upon the side-frame f which projecting parts f³ f
embrace the rib b. is a short shaft supported by and capable of being rotated
in an upright part secured to the side-frame f. Upon the shaft is a pinion m
the teeth of which pinion m gear into the teeth of a toothed wheel n secured
upon a shaft o extending across the carriage A and capable of being rotated
in brackets carried by such carriage A. Upon the shaft o is mounted a toothed
wheel n. The wheels n, n¹ gear respectively into toothed wheels k³ ³ secured
to the wheels respectively. The shaft is provided with a handle
by the rotation of which handle the shaft o and wheels k. may be caused to
rotate and cause the carriage A to be moved along the board or tray a in one
direction or the other according to the direction in which the handle is turned.
I provide the carriage A with a trough B formed by end pieces p. p¹ side pieces q, q'
and a bottom r. To the bottom I secure a jaws which embraces a staple t
secured to the cross-piece 71 of the carriage A. u is a vessel or funnel secured to
the cross-piece h by the neck of the vessel or funnel u being passed through the said
cross-piece h. I provide the neck of the vessel or funnel u with a plug or valve v
the upper end of which is jointed by means of pins and a link to a bar w which
bar w is capable of being turned upon a pin resting in recesses formed in the
upright part f. y is a stop or trigger the lower end of which is mounted so as to
be capable of being turned upon a pin & secured to the cross-piece h. The upper
end of the stop or trigger y at times as will be hereinafter described serves to
support the end w² of the bar or lever w.
Having now described the various parts of this portion of my invention I will
now describe their operation.
The board or tray a is placed upon a table or bench and adjusted to a horizontal
position by means of the levelling screws C. The plates of glass to which the
emulsion is to be applied are placed upon the parts b¹ of the board or tray a
between the ledges or bars b 6 and the first plate of glass placed between the
ledges or bars bbs is placed with one of its ends against the stop c. The next
plate of glass is placed so that its end abuts against that end of the plate of glass
above-mentioned which is farthest away from the stop c. The remaining plates of
glass to be coated with the emulsion are placed between the ledges or bars 6 b² in
a similar manner until the space between the stop c and the block d has been filled
with plates of glass. The block d is then adjusted by the screw e. so that the
plates of glass will be prevented from moving longitudinally upon the board or
tray a. The stop or trigger y having been turned into the position indicated by
the dotted lines D in Fig. 2 the plug or valve v is caused to close the neck of the
vessel or funnel u. and the handle is turned so as be about in the position
indicated by the dotted lines E. The vessel or funnel . is then charged with
.

page_text: emulsion and the trough B. after being turned upon the staple t into the position
indicated by the dotted lines F is also charged with emulsion. The carriage A
and the parts connected therewith are then placed upon the board or tray a at the
end G thereof in such position that the wheels kk may be caused to travel along
the upper surface of the ledges or bars 66 and also in such position that when the
trough B is tilted into the position in which it is indicated by full lines, the part r
of the said trough B will rest upon the left hand end of the first of the plates of
glass to be coated with emulsion. The trough B is then tilted into the position in
which it is shown by the full lines. The emulsion then issues from the trough B
through the slit or opening B¹ which is formed along the trough B and of a length
equal to the width of the plates of glass to be coated with the emulsion-At the
same time that the trough B is tilted into the position in which it is shown by the
full lines the handle is caused to commence to rotate in the direction indicated
by the arrow H and by so doing cause the carriage A to be traversed along the
board or tray a in the direction indicated by the arrow J. The handle is rotated
at such speed that the emulsion issuing through the slit or opening B¹ will form an
uniform coating of the required thickness upon the plates of glass over which the
carriage A is traversed. The rotation of the handle will cause the inclined cam *
upon the said handle to pass over the end of the bar or lever w so as to
depress the end w* of the said bar or lever wand raise the plug or valve v and
allow the emulsion from the vessel or funnel u to flow into the trough B and by
allowing the emulsion from the vessel or funnel u to flow into the trough B will
tend to maintain a constant quantity of emulsion in the trough B and thus ensure
an uniform flow of emulsion from the slit or opening B¹. After the end w¹ of the
bar or lever w has been raised by the action of the cam 1 the stop or trigger y is
forced forward by a spring which causes the upper end of the stop or trigger y to
pass beneath the end w¹ of the bar or lever w and maintain the end w¹ of the bar
or lever w when raised into the position in which it is shown by full lines in the
drawing so that the emulsion will be allowed to flow from the vessel or funnel u
into the trough B. When the carriage A has been traversed nearly to the end K
of the board or tray a or to the end of the last plate of glass to be coated with the
emulsion the trough B is tilted into the position in which it is shown by the dotted
lines F and the stop or trigger y is turned to allow the end w¹ of the bar or lever w
to descend and allow the plug or valve v to close the neck of the vessel or funnel u
so as to stop the flow of emulsion from the vessel or funnel u. Plates of glass to
be coated with emulsion having been placed upon the board or tray a between the
ledges or bars 6 6 the carriage A is placed upon the ledges or bars b' 63 and the
plates of glass between the ledges or bars 6* 63 are coated with emulsion by
employing the apparatus above described in a manner similar to that in which it is
above described as being used to coat the plates of glass between the ledges or
bars bb-with emulsion. While the emulsion is flowing from the slit or opening B¹
on to the plates of glass being coated with emulsion it will be necessary to rotate
the handle at an uniform or nearly uniform rate so as to traverse the carriage A
at an uniform or nearly uniform speed along the plates of glass to be coated with
eruulsion. In order to enable the carriage A to be more readily moved at an
uniform or nearly uniform speed along the plates of glass to be coated with
emulsion a metronome or other apparatus by means of which equal divisions of
time may be indicated may be employed to assist the person using the apparatus
above described to turn the handle at an uniform or nearly uniform speed.
When the plates of glass placed upon the board or tray a have been coated with
emulsion as above described I remove the carriage A from the board or tray a and
place upon such board or tray a another board or tray similar in construction to
the said board or tray a the ledges or bars 6 6 6 upon which board or tray a
prevent the back of the board or tray placed upon the board or tray a from coming
in contact with the emulsion upon the plates of glass upon the board or tray a and
also preserve a space through which as will be hereinafter described I cause air to
pass for a purpose to be hereinafter described. I place plates of glass to be coated

page_text: with emulsion upon the board or tray placed upon the board or tray a and then
coat the said plates of glass with emulsion in a manner similar to that above
described and again proceed as above described until I have coated with emulsion
as many plates of glass as may be desired.
"
The board or tray a or boards or trays a along with the plates of glass placed
thereon and coated with emulsion may be placed in a "drying box" or drying
chamber" of any suitable construction for the purpose of drying the emulsion upon
such plates of glass-If each of the boards or trays a be placed upon a level surface
while the plates of glass placed thereon are being coated with emulsion the levelling
screws C may be dispensed with.
In Figs. 2 and 3, 1 is a jacket or casing which is placed around the vessel or
funnel and is used to contain heated water for the purpose of keeping the
emul-ion contained in the vessel or funnel u in the proper condition for flowing on
to the plates of glass to be coated with the said emulsion-I also propose in some
cases to provide the trough B with a jacket or casing for containing heated water
for the purpose of keeping the emulsion contained in the trough B in the proper
condition for flowing on to the plates of glass to be conted with such emulsion-
In some cases the jacket or casing 1 may be dispensed with.
In some cases when it is only desired to coat a small number of plates of glass
with emulsion I do not employ the vossel or funnel u, the bar or lever w and stop
or trigger y but only employ the trough B along with the carriage A.
In some cases I do not employ the shaft o and wheels n¹³. In such cases
I mount the wheel n upon a stud secured to the side-frame fand in such cases the
carriage A. is caused to travel along the ledges or bars b by means of the handle /
pinion m wheel n and wheels k and k and when employing this arrangement
I dispense with the projecting rib f³ and employ the projecting parts ƒ³f to keep
the carriage A in position while being traversed longitudinally upon the board or
tray a.
"
In some cases I traverse the carriage A, longitudinally upon the boards or trays a
before mentioned by means of a cord or other suitable means by means of which
cord or other suitable means I connect the carriage A above mentioned to
an axle rotated at an uniform speed by hand, clock-work or any other suitable
means. This arrangement is illustrated by Fig. 4 which is a plan of so much
of the apparatus as is requisite to illustrate the manner in which this portion
of my invention is carried into effect. 2, 3 are the sides of a box or case L
in which are placed the boards or trays, similar to the board or tray a above
described; upon which the plates of glass to be coated with emulsion are
placed. 4 is a shaft capable of being rotated by means of a handle 5 and
mounted in suitable bearings secured to the side 3 of the box or case L. Fast upon
the shaft 4. is a pulley 6 from which by means of an endless band 7 rotary
motion may be transmitted to the pulley 8 which is mounted fast upon a shaft .
which is supported by and capable of being revolved in a bearing formed in the
side 3 of the box or case L. Fast upon the shaft 9 is a barrel or roller 10, around
which a cord 11 may at times be wound. The dotted lines M indicate a carriage
which is similar in construction and employed similarly to that described in the
previous part of this my specification-To the carriage M is attached one end of the
cord 11 which passes partially around a guide-pulley 12 which is mounted upon a
stud 13 secured to the end 14. of the box or case L. The cord 11 is then passed
partially around a guide pulley 15 mounted upon a stud secured to the end 14 of
the box or case L, and is then passed to the barrel or roller 10 to which the
remaining end of the cord 11 is secured-When the handle 5 is rotated the cord 11,
will be wound upon the barrel or roller 10 and cause the carriage M to be traversed
along the board or tray placed in the box or case L, in the direction indicated by
the arrow N. When the carriage M has arrived at the end O of the board or tray a
placed in the box or case L, the cord 11 is unwound from the barrel or roller 10
and the carriage M is placed upon the ledges or bars b 63 and at the end P of the
board or tray a and the cord 11, is passed partially around the guide pulleys 16. 15.

page_text: when the carriage M may by the handle 5 being rotated be caused to traverse in
the direction indicated by the arrow N. along the board or tray a.
By the employment of the apparatus above described plates of glass may be
readily coated with an even and uniform coating of emulsion.
A further part of my invention consists in arrangements of apparatus for drying
the coating of emulsion upon the plates of glass to which such emulsion is applied.
The apparatus in which this part of any invention consists is illustrated by
Figs. 5, 6 and 7, in which figures, Fig. 5 is an elevation partly in section Fig. O is
a plan partly in section and Fig. 7, a cross section, of a case or cover Q, and the
other apparatus employed in carrying this portion of my invention into effect.
17 is the bottom of the case or cover Q. The bottom 17 is supported by the
parts 18. 19. 20. 21. To the bottom 17 are connected parts 22. 23. which con-
stitute the ends of the case or cover Q. Secured to the bottom 17, is one side 24
of the case or cover Q to which side 24 the top 25 of the case or cover Qis
connected by means of hinges 26.
The front 27 of the case or cover Q is connected to the top 25 of such case or
cover Q by means of hinges 28.-The hinges 26. 28. permit the front 27 and top 25,
of the case or cover Q to be turned so as to allow ready access to the bottom 17 of
the case or cover Q-When I have coated with emulsion as many plates of glass as
may be desired I place as many of the boards or trays a on which are the plates of
glass coated with emulsion, as the case or cover Q will contain one above another
upon the bottom 17 of such case or cover Q. I then turn the top 25 and front 27
of the case or cover Q into the position in which they are shown in the drawing.—
At the ends 22. 23. of the case or cover QI form chambers 29. 30.-The chamber 29
communicates by a passage 31. with a chimney 32. in which is situate a gas-
burner 33. to which gas is supplied by the pipe 34.-The flame in the chimney 32.
causes air to be drawn through the opening 35 into the chamber 30 and over the
surfaces of the glass plates placed within the case or cover Q, the spaces R, between
the boards or trays a and between the boards or trays a and the top 25 of the case
or cover Q forming passages along which the air travels in the direction indicate l
by the arrow S-In order that the air aforesaid may pass over the surface of the
emulsion upon the glass plates so as to dry such emulsion I reduce the area of each
of the spaces R at T so that the united area of the spaces R will not exceed the
area of the horizontal section of the interior of the chimney 32-Instead of the
chimney 32 and gas burner 33 being employed, the passage 31 may be caused to be
in communication with a flue or other suitable appliance or apparatus, by means
of which a current of air may be maintained. The side 24 top 25 front 27
ends 22. 23 and parts 20. 21. 36. 37. 38 prevent the access of light to the emulsion
upon the plates of glass while such emulsion is being dried. When the emulsion
upon the plates of glass has become dried to the extent desired the front 27 and
top 25 of the case or cover Q are turned clear of the boards or trays a whereupon
the said boards or trays a and the plates of glass may be removed or desired.
The boards or trays a used in conjunction with this part of my invention are
similar to the board or tray above described in connection with the first part of my
invention with the exception that the levelling screws C and the stop c block d and
screw e are not required as the case or cover Q.may be placed level and each board
or tray a with the plates of glass placed thereon may be placed in the said case or
cover Q before the emulsion is applied to such plates of glass by means of the
apparatus above described in reference to the first part of my invention, but if
desired each of the boards or trays a may be provided with levelling screws to
enable the plates of glass placed upon such boards or trays a to be coated with
emulsion without such boards or trays a being or before such boards or trays a are,
placed in the said case or cover Q. Such levelling screws must however be so
formed that they will not interfere with the placing of the boards or trays a
within the case or cover Q.
If desired, the boards or trays a used in conjunction with the case or cover Q
may be provided with stops c and blocks d and screw: e similar to those above

page_text: described in reference to Fig. 1. but in such cases the screw e must be so arranged
that it will not interfere with the placing of the boards or trays a one above
another within the case or cover, Q.
Although I have only described my invention as applied to coating plates of
glass with emulsion and to drying the emulsion upon the plates of glass to which it
is applied I would have it understood that my invention may be applied to
coating with emulsion and drying the emulsion applied to plates composed of
materials other than glass.
Although I have hereinbefore described the apparatus for applying the emulsion
to the plates of glass or other material and the apparatus for drying the emulsion
when applied to such plates as being used in conjunction with each other I would
have it understood that the said apparatus for applying the emulsion to the plates
of glass or other material and the apparatus for drying the emulsion when applied
to plates of glass or other material may be used separately and independently of
each other if desired.
I would have it understood that I do not confine myself to the use of my
invention precisely as hereinbefore described as the mode of carrying my invention
into effect may be somewhat varied without departure from the principles of my
invention.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is-
1. For use in coating such plates used in photography as are known as "dry-
plates" the apparatus hereinbefore described in reference to and shown in and by
Figs. 2 and 3 of the drawings hereunto annexed which apparatus consists in the
carriage A provided with wheels kk', trough B handle shaft / pinion m
wheels n, n¹ shaft o wheels k³ ³ projecting rib f and projecting parts ƒ ƒ vessel
or funnel u, plug or valve v, bar or lever w, cam and stop or trigger y all
arranged and operating substantially as hereinbefore described in reference to and
shown in and by Figs. 2 and 3 of the drawings hereunto annexed.
"
2. For use in coating such plates used in photography as are known as dry-
plates" the apparatus herein before described in reference to and shown in and by
Figs. 2 and 3 of the drawings hereunto annexed, which apparatus consists in the
carriage A wheels k, k¹, k³, kª, trough B wheels n, n¹ and shaft o pinion m shaft l
and handle all arranged and operating substantially as hereinbefore, described in
reference to and shown in and by Figs. 2 and 3 of the drawings hereunto annexed.
3. For use in coating such plates used in photography as are known as "dry-
plates" the apparatus herein before described in reference to and shown in and by
Figs. 2 and 3 of the drawings hereunto annexed which apparatus consists in the
carriage A provided with wheels k, k¹ trough B handle l¹, shaft l, pinion m, wheel n,
wheel, projecting parts f³, f*, vessel or funnel u, plug or valve v, bar or lever w,
cam, and stop or trigger y, all arranged and operating substantially as herein-
before described in reference to and shown in and by Figs. 2 and 3 of the drawings
hereunto annexed.
"
4. For use in coating such plates used in photography as are known as dry-
plates" the apparatus herein before described in reference to and shown in and by
Figs. 2 and 3 of the drawings hereunto annexed which apparatus consists in the
carriage A wheels k, k³, k³, trough B, wheel n, pinion m, and handle all arranged
and operating substantially as herein before described in reference to and shown in
and by Figs. 2 and 3 of the drawings hereunto annexed.
5. For use in the apparatus for coating such plates used in photography as are
known as g
dry-plates," which is herein before described in reference to Figs. 2
and 3 of the drawings hereunto annexed, a jacket or casing 1 to contain heated
water for the purpose and substantially as herein before described in reference to
und shown in and by Figs. 2 and 3 of the drawings hereunto annexed,
4

page_text: 6. For use in the apparatus for coating such plates used in photography as are
known as "dry-plates," which is hereinbefore described in reference to Figs. 2
and 3 of the drawings hereunto annexed; a jacket or casing applied to the trough B
to contain heated water for the purpose and substantially as hereinbefore described
in reference to Figs. 2 and 3 of the drawings hereunto annexed.
7. For use in coating such of the plates used in photography as are known as
dry-plates" the apparatus herein before described in reference to and shewn in
and by Fig. 4 of the drawings hereunto annexed which apparatus consists in the
carriage indicated by the dotted lines M the cord 11 passed around suitable
guide-pulleys, the barrel or roller 10 and the shaft 9 all arranged and operating
substantially as hereinbefore described in reference to and shown in and by Fig. 4
of the drawings hereunto annexed.
8. For use in drying the emulsion upon such of the plates used in photography
as are known as "dry-plates" the apparatus herein before described in reference to
and shown in and by Figs. 5. 6. and 7 of the drawings hereunto annexed, which
apparatus consists in the case or cover Q formed with the bottom 17 ends 22. 23.
side 24 top 25 front 27 hinges 26. 28 chambers 29. 30 passage 31 the boards or
trays a with the ledges or bars b, bª, 6ª and the chimney 32 or other equivalent
therefor all arranged, used and operating substantially as herein before described in
reference to and shown in and by Figs. 5. 6 and 7 of the drawings hereunto
annexed.
9. For use in coating or coating and drying such plates used in photography as
are known as "dry-plates" the boards or trays a hereinbefore described, substan-
tially as and for the purposes herein before described in reference to and shown in
and by the drawings hereunto annexed.
W. T. CHEETHAM,
Agent to the Applicant.