IMPROVE- MENTS TN APPARATUS FOR RESPIRATORY AND INHALING PURPOSES
Year: 1874

page_text: LETTERS PATENT to James Carrick, of George Square, Glasgow, in
the County of Lanark, Gentleman, for the Invention of "IMPROVE-
MENTS TN APPARATUS FOR RESPIRATORY AND INHALING PURPOSES "
Sealed the 26th June 1874, and dated the 29th April 1874.
PROVISIONAL SPECIFICATION left by the said James Carrick at the
Office of the Commissioners of Patents, with his Petition, on the
29th April 1874.
I, JAMES CARRICK, of George Square, Glasgow, in the County of
Lanark, Gentleman, do hereby declare the nature of the said Invention
for IMPROVEMENTS IN APPARATUS FOR RESPIRATORY AND INHALING PURPOSES,"
to be as follows:-
66
My Invention consists of improvements upon an Invention described
in the Specification of Letters Patent granted to me and bearing date
16th March 1864. That Invention consisted in part of a respirator
which was to be worn upon the mouth and was provided with inlet and
outlet valves for the ingress and egress of the air respired and was

page_text: Doay.
Now my present Invention consists, firstly, in constructing respirators
as herein-after described, so as to enable them to be worn on the body,
and connecting the respirator by means of a flexible tube to a mouth-
piece, which is so formed that it can easily be held between the lips
and retained there while speaking, instead of connecting it to a mouth-
piece covering the mouth, thereby avoiding the unsightly appearance of
respirators which cover the mouth and the inconvenience of having to
remove them while speaking. In making a respirator according to this
part of my Invention I contruct a frame or case of wire or perforated
sheet metal over which I fix felt, flannel, or other fibrous filtering material
which will intercept dust and other injurious particles. This frame or
case is of a form suitable to allow of its being worn on the chest, and at
the upper part I construct an air chamber, which communicates with
the said case and through which the air inspired and expired passes;
the said chamber being furnished with inlet and outlet valves, the
former of which admits to the chamber the air which is drawn through
the aforesaid case on its way to the mouth of the user, but prevents any
The inlet valve
of the expired air from passing back into the case.
allows the respired air to pass away from the air chamber into the
external air, but prevents the external air from entering the said
chamber, which is closed by an air-tight cover which can be removed
from time to time to allow of the water resulting from the condensation
of the user's breath being poured out. To this lid is affixed a flexible
tube having at its upper end a mouth-piece, which is held between the
user's lips. Or instead of constructing the chamber with a moveable
cover it may be furnished with a small tap through which the water of
condensation may be drawn off.
When it is wished to cool or moisten the air inspired or to purify it
from noxious gases, the filtering material herein-before referred to is
kept moist. This is effected by occasionally dipping the said case intó
water, or preferably by securing a suitably formed vessel containing
water to the lower part of the said case. By this means the filtering
medium is kept constantly charged with water and the air drawn
through the said filtering medium is thereby moistened, cooled, and
purified,

page_text: The method of using and the action of this respirator are as follows:―
The case covered with the filtering medium is worn upon the body
outside the clothes of the user, and the mouth-piece, which is connected
by the flexible tube to the said case, is placed between the lips. The
air inspired is drawn through the filtering medium and thereby purified,
it then passes to the air chamber aforesaid through the inlet valve, and
thence through the tube to the mouth of the user. On the air being
expired it passes back into the said chamber and thence through the
outlet valve into the external air, the inlet valve closing and thereby
preserving the respirator from contact with the vitiated air.
.
My Invention further consists of the combined inhaling and respi-
ratory apparatus, which is more especially designed to warm and to
medicate the air to be inspired, and which (like the preceding appa-
ratus) is to be worn upon the body, but under the clothes, and is con-
structed as herein-after described. This apparatus consists of a sheet-
metal case divided by a perforated diaphragm into two compartments.
In one of these is inserted, through an aperture in the diaphragm,
'felt, wool, or other absorbent, saturated or impregnated with any
medicinal matter with which it is wished to impregnate the air to
be inhaled. This compartment communicates with an air chamber
(furnished with inlet and outlet valves) similar to that herein-before
described. with reference to the respirator, constituting the first part of
my Invention, which chamber also is provided with a flexible tube
terminating in a mouth-piece. In the other compartment, which is
closed by a door of perforated sheet metal, felt, or flannel, or other
suitable filtering medium is placed and secured so as to constitute the
respirator, which may, if desired, be kept moist by water contained in
a receptacle formed at the lower part of the compartment occupied by
the said filtering medium. At each inspiration of the user air enters
the respirator through the perforations in the door thereof, and thence
passes through the felt or flannel or other filtering medium through
the perforations in the diaphragm, and thence through the medicated
medium placed in the inner compartment of the inhaler, where it is
impregnated with the medicinal matter used, and from which it passes
through the air chamber and tube, as in the respirator last described;
the said air being warmed in its passage by the animal heat of the
person using it.

page_text: outlet valves in a chamber formed on the inhaling apparatus as herein-
before described, they may be placed in the tube near the mouth-piece.
My Invention further consists of an inhaling apparatus which instead
of being worn on the person may be stood on a table for the purpose
of warming, cooling, purifying, or medicating the air drawn through it
by the user. This apparatus consists of a case made of wicker-work,
perforated vulcanite, or other imperfect conductor of heat, over which
is stretched felt or flannel, and to the upper part of which is connected
the flexible tube herein-before described, in which and near the mouth-
piece thereof the inlet and outlet valves are placed.
When it is wished to cool the air respired the lower part of this case
is immersed in a shallow pan containing water, which being absorbed
by the felt or flannel and evaporated, cools the air as it is drawn into
the case, in which such air may be further cooled by ice placed in the
said case, or be impregnated with any medicinal matter placed therein
or in the water surrounding the said case.
When it is wished to warm the air respired the apparatus is mounted
over a spirit lamp. This apparatus may be provided with several tubes,
so that it may be used by several people at the same time.
By constructing respirators as herein-before described, a large filtering
surface is provided for the passage of the air inhaled, and the difficulty
of inspiration occasioned by the use of respirators of the ordinary con-
struction is thereby obviated.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Carrick in the Great Seal Patent Office on 2
the 29th October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
CARRICK, of George Square, Glasgow, in the County of Lanark,
Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of April, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her. heirs and successors,

page_text: ي
give and grant unto me, the said James Carrick, Her special license that
I, the said James Carrick, my executors, administrators, and assigns, or
such others as I, the said James Carrick, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for " IMPROVEMENTS IN APPARATUS FOR
RESPIRATORY AND INHALING PURPOSES," upon the condition (amongst others)
that I, the said James Carrick, my executors or administrators, by an
instrument in writing, under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said James Carrick, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by tho
following statement thereof, that is to say :-
My Invention consists of improvements upon an Invention described
in the Specification of Letters Patent granted to me, and bearing date
16th March 1864. That Invention consisted in part of a respirator
which was to worn upon the mouth, and was provided with inlet
and outlet valves for the ingress and egress of the air respired, and was
connected by a tube to an "inhaling apparatus" to be worn on the
body.
Now my present Invention consists, firstly, in constructing respira-
tors, as herein-after described, so as to enable them to be worn on the
body, and connecting the respirator by means of a flexible tube to a
mouth-piece, which is so formed that it can easily be held between the
lips, and retained there while the user is speaking, instead of connecting
it to a mouth-piece covering the mouth, thereby avoiding the unsightly
appearance of respirators which cover the mouth, and the inconvenience
of having to remove them while speaking. In making a respirator
according to this part of my Invention I construct a frame or case of
wire, or perforated sheet metal, over which I fix felt, flannel, or other

page_text: fibrous filtering material, which will intercept dust and other injurious
particles. This frame or case is of a form suitable to allow of its being
worn on the chest; and at the upper part I construct an air chamber
which communicates with the said case, and through which the air
inspired and expired passes, the said chamber being furnished with inlet
and outlet valves, the former of which admits to the chamber the air
which is drawn through the aforesaid case on its way to the mouth of
the user, but prevents any of the expired air from passing back into the
case. The outlet valve allows the respired air to pass away from the air
chamber into the external air, but prevents the external air from
entering the said chamber, which is closed by an air-tight cover which
can be removed from time to time to allow of the water resulting from
the condensation of the user's breath being poured out. To this lid is
affixed a flexible tube having at its upper end a mouth-piece, which is
held between the user's lips. Or instead of constructing the chamber
with a moveable cover it may be furnished with a small tap through
which the water of condensation may be drawn off.
.
When it is wished to cool or moisten the air inspired, or to purify
it from noxious gases, the filtering material herein-before referred
to is kept moist. This is effected by occasionally dipping the said case
into water, or preferably by securing a suitably formed vessel containing
water to the lower part of the said case. By this means the filtering
medium is kept constantly charged with water, and the air drawn
through the said filtering medium is thereby moistened, cooled, and
purified.
The method of using and the action of this respirator are as follows ::
The case covered with the filtering medium is worn upon the body
outside the clothes of the user, and the mouth-piece, which is connected
by the flexible tube to the said case is placed between the lips. The air
inspired is drawn through the filtering medium, and thereby purified.
It then passes to the air chamber aforesaid through the inlet valve, and
thence through the tube to the mouth of the user. On the air being
expired it passes back into the said chamber, and thence through the
outlet valve into the external air, the inlet valve closing, and thereby
preserving the respirator from contact with the vitiated air.
My Invention further consists of the combined inhaling and respiratory
apparatus, which is more especially designed to warm and to medicate

page_text: the air to be inspired, and which (like the preceding apparatus) is to be
worn upon the body, but under the outer clothes or garments, and is
constructed as herein-after described. This apparatus consists of a case
divided by a perforated or reticulated diaphragm into two compartments.
In one of these is inserted through an aperture in the diaphragm felt,
wool, or other absorbent saturated or impregnated with any medicinal
matter with which it is wished to impregnate the air to be inhaled. This
compartment communicates with an air chamber (furnished with inlet
and outlet valves) similar to that herein-before described with reference to
the respirator constituting the first part of my Invention, which chamber
also is provided with a flexible tube terminating in a mouth-piece. In the
other compartment, which is closed by a door of perforated sheet metal or
wire gauze, felt, or flannel, or other suitable filtering medium, is placed
and secured so as to constitute the respirator, which may if desired be
kept moist by water contained in a receptacle formed at the lower part
of the compartmeut occupied by the said filtering medium. At each
inspiration of the user air enters the respirator through the perforations
in the door thercof, and thence passes through the felt or flannel, or
other filtering medium, through the perforations in the diaphragm, and.
thence through the medicated medium placed in the inner compartment
of the inhaler, where it is impregnated with the medicinal matter used,
and from which it passes through the air chamber and tube, as in the
respirator last described, the said air being warmed on its passage by
the animal heat of the person using it.
In both the foregoing arrangements, instead of placing the inlet and
outlet valves in a chamber formed on the inhaling apparatus, as herein-
before described, they may be placed in the tube near the mouth-piece.
My Invention further consists of an inhaling apparatus, which instead.
of being worn on the person may be stood on a table for the purpose of.
warming, cooling, purifying, or medicating the air drawn through it by
the user.
This apparatus consists of a case made of wickerwork, per-
forated vulcanite, or perforated sheet metal or wire gauze, over which is
stretched felt or flannel, and to the upper part of which is connected the
flexible tube herein-before described, in which and near the mouth-piece
thereof the inlet and outlet valves are placed.
When it is wished to cool the air respired the lower part of this case is
Mad in
containing water which being absorbød hv

page_text: the felt or flannel and evaporated, cools the air as it is drawn into the
case, in which such air may be further cooled by ice placed in the said
case, or be impregnated with any medicinal matter placed therein or in
the water surrounding the said case.
When it is wished to warm the air respired the apparatus is mounted
over a spirit lamp. This apparatus may be provided with several tubes,
so that it may be used by several people at the same time.
•
By constructing respirators as herein-before described a large filtering
surface or area of suction is provided for the passage of the air inhaled,
and the difficulty of inspiration occasioned by the use of respirators of
the ordinary construction is thereby obviated.
Having now described the nature of my Invention I will proceed to
describe the manner in which the same is to be performed, reference
being had to the accompanying Drawings, and to the letters and figures
marked thereon, premising that the same letters of reference indicate
the same parts in the several Figures of the said Drawings, and that
where parts of the apparatus described with reference to and represented
in the Drawings of one arrangement are represented in the Drawings of
other arrangements I do not consider it necessary to repeat the descrip-
tion of such parts.
Figure 1 is a front elevation, and Figure 2 is a vertical section (taken
on the line 1, 2, Figure 1) of a respirator constructed according to this
part of my Invention.
. A. is a frame of wire and sheet metal, which frame is of a form suitable
to allow of its being conveniently worn on the chest. Over this frame
a bag or case B of felt, flannel, or other fibrous material which will
intercept dust and other injurious particles is placed, and is secured to the
said frame by an elastic ring b, which presses the upper part of the
bag B into a groove a formed around the upper part of the frame A. I
find in practice that the cloth made by the Wandle Felt Company of a
mixture of sponge with wool answers well for my purpose, or ordinary
felt of close texture may be used. Above the frame A and affixed thereto
is an air chamber C, which communicates with the said case B by means
of a short tube c' provided with a valve c² (termed the inlet valve): The
upper part of the said chamber is closed by a lid or cover c³ provided
with another short tube c¹ and a valve c³ (termed the outlet valve). On
the said lid or cover is another tube c', which communicates with the air

page_text: chamber C. To the tube c a flexible tube D having a mouth-piece dat
its upper end is connected. Formed on or affixed to the air chamber C
are rings or staples c', c", to which a cord (parts of which are shown at
E, E,) is attached.
The method of using and the action of this apparatus are as follows:
The respirator is suspended from the neck by means of the cord E,
and lies outside the clothes of the user, and the mouth-piece d is placed
between the lips.
The air to be inspired is drawn through the filtering medium B.
which arrests dust and other injurious particles; the said air then
passes through the short tube c' into the air chamber C, opening
the valve c² in its passage. It then passes through the flexible tube D
and mouth-picce d, and is inspired. When the said air is expired.
it passes through the mouth-piece and flexible tube into the air chamber,
but being prevented by the closing of the valve c from re-entering the
bag or case B, it passes out of the said chamber by the short tube c¹,
the valve con which opens to permit of the passage of the said air,
and closes when it has passed out. By this arrangement of valves air
is prevented from passing to the lungs of the user except through the
filtering medium B through which the expired air is prevented from
passing. The said filtering medium is thus preserved from contact
with the vitiated air respired. The water resulting from the con-
densation of the user's breath collects in the air chamber C from which
it may be poured occasionally, the lid c³ being first removed.
Or instead of providing the said air chamber with a moveable cover
it may be furnished with a small tap through which the said water of
condensation may be drawn off.
Instead of the frame of wire A a case made of perforated sheet metal,
or of wire gauze, may be used.
This
When it is wished to moisten or cool the air inspired, or to purify
it from noxious gases, the filtering medium B is kept moist.
is effected by occasionally dipping that part of the respirator covered
by the filtering medium in water, or preferably by the arrangement
illustrated in Figure 3, which represents in vertical longitudinal section
a respirator constructed' as lierein-before described and illustrated in
Figures 1 and 2, and provided with means for keeping the said filtering

page_text: medium moist. F is a vessel for holding water. The upper edge of
this vessel is turned inward and bent down, as shown at f, in order to
prevent the water contained in the said vessel from being spilled when
the respirator is being used. The said, vessel encloses the lower part
of the respirator, and is held thereto by clastic bands f¹, f, which
pass over ears f², f³, and c³, cs, formed on or affixed to the ends of the
said vessel F and air chamber C, respectively. By this means the
filtering medium covering the lower part of the frame A is kept
constantly immersed in water, which by capillary attraction rises to
that part of the filtering medium not covered by the water vessel F,
through which parts the air to be inspired is drawn, which air is thereby
moistened, cooled, and purified.
My Invention further consists of a combined inhaling and respiratory
apparatus which is more especially designed to warm and medicate
the air respired. This apparatus is illustrated in Figures 4, 5, 6, and. 7
of the accompanying Drawings, Figure 4 being a front view, Figure 5
a plan, Figure 6 (which is drawn of the full size) a vertical section
taken on the line 3, 4, Figure 4, and Figure 7 a front view showing
the case open.
The said apparatus consists of a case G divided by a diaphragm g¹ of
wire gauze or perforated sheet metal into two compartments g², H.
The said diaphragm is provided with a sliding shutter g³, which covers
an aperture therein, through which aperture felt, wool, or other
absorbent I saturated or impregnated with any medicinal matter with
which it may be wished to impregnate the air to be inhaled may be put
into the said inner compartment g². This compartment communicates
with an air chamber provided with inlet and outlet valves, and a flexible
tube terminating in a mouth-piece, as in the arrangement herein last
described. In the other compartment (H) felt or flannel, or other
suitable filtering medium h¹, is placed. The outer side of this compart- a
ment consists of a hinged door ² of sheet metal, part of which door is
perforated, or is formed of wire gauze h³. On the inside of the said door
and near the edges thereof a tube 4 is affixed, in the upper part of
which tube an aperture 75 is made, which aperture is provided with a
screw stopper ; and at the lower part of the said tube, on the side a
next the filtering medium h³, small perforations 7, 7, are made.
The method of using, and the action of this respirator are as
follows: The apparatus is suspended from the neck, and the mouth-

page_text: piece held between the lips and the teeth, the case resting on the chest,
but under the outer clothes or garments. At each inspiration of the
user air enters the respirator through the reticulations or perforations /³
in the door 2, and thence passes through the filtering medium ¹ through
the reticulations or perforations in the diaphragm g' and sliding shutter g³;
and thence through the medicated medium I placed in the inner com-
partment g, where it is impregnated with the medicinal matter used;
and from which it passes through the air chamber and tube as in the
respirator herein-before described, the said air being warmed on its
passage by the animal heat of the person using it.
When it is wished to moisten the air inspired, the tube /* is filled
with water, which passing out of the perforations 1, 7, keeps the
filtering medium damp; or an arrangement similar to that herein-
before described and represented in Figure 3 may be used for this
purpose.
Instead of placing the inlet and outlet valves in a chamber formed on
the inhaling apparatus, as herein-before described and illustrated in
Figures 1. to 7, both inclusive of the accompanying Drawings, they may
be placed in the tube near the mouth-piece, or in the said mouth-piece,.
as herein-after described and illustrated in Figures 10, 12, and 13.
When the said valves are so arranged the air chamber C is dispensed_
with, and the tube D communicates directly with the inhaling apparatus
or case, as illustrated in Figures 8 and 9, Figure 8 being a longitudinal
section of the apparatus, Figure 1, modified according to this part of my
Invention, and Figure 9 being a transverse section of my combined
inhaling and respiratory apparatus similarly modified.
My Invention further consists of the inhaling apparatus herein-after
described and illustrated in Figures 10, 11, and 12 of the accompanying
Drawings. Figures 10 and 11 represent in vertical section and elevation.
respectively one arrangement of this apparatus, the tube k' and mouth-
piece ² not being shown in Figure 11.
The object of this apparatus is to moisten, warm, cool, medicate, or
purify the air drawn through it. The said apparatus consists of a case J
made of wickerwork, perforated vulcanite, or of perforated sheet metal
or wire gauze, over which is stretched felt, flannel, or other suitable
filtering medium H, and the upper part of which case is closed by a
moveable cover, j'. j is a shelf, on which the matters used for cooling...

page_text: or medicating the air are placed, as herein-after described. K is a tube
passing through the said cover ¹, to which tube a flexible tube ¹ is
attached; is the mouth-piece affixed to the flexible tube; ³ is a
thermometer, by which the tmperature of the air passing through the
tube K may be ascertained. The inner end of the tube K is brought
down to within a short distance of the shelf j in order that the air drawn
into the said tube may come in contact with any medicinal matter which
may be placed on the said shelf. The mouth-piece k² is provided with an
inlet valve, consisting of a sphere 5, which rests on an annular seat kº,
the motion of the said sphere being limited by the pin 7, which passes
across the said mouth-piece. The outlet valve 8, which is similar in
construction to the inlet valve, is placed in a short tube kº, which com-
municates with the said mouth-piece. L is a dish supported on a
stand M, in which dish water is put when it is wished to moisten the
air. N is a spirit lamp mounted on the said stand.
This apparatus acts as follows:-When it is wished to cool and moisten
the air to be inhaled water is put in the dish L in which the case is
stood, and in addition to this if it be required still further to cool the
air lumps of ice may be put into the upper part of the case J. When it
is wished to medicate the air the medicinal matter if solid is put on the
shelf in the case J, if liquid a sponge or other absorbent is saturated
with such liquid and placed on the shelf, as represented at O, Figure 8.
Or if water be used in the dish Ĺ the medicinal matter may be placed
therein. When it is wished to warm the air respired the lamp N is
used.
Figure 12 is a vertical section of a modification of the inhaling.
apparatus illustrated in Figures 10 and 11. In this arrangement the
case J (which in this apparatus is made of perforated sheet metal) is
placed in an outer case P, the lower part of which may contain water,
the said case being mounted on a stand M under which a lamp N may
be put when required.
The pipe K, illustrated in Figures 10 and 11, may be perforated, as
illustrated with respect to the pipe L (Figure 12) for the purpose of
drawing air between the lumps of ice when ice is used in the said
apparatus.
The mouth-piece. O represented in side elevation in Figure 12, in
vertical section in Figure 13, and in plan in Figure 14 is essentially
similar to the mouth-piece k², Figure 10, the chicf difference being in.

page_text: be conveniently held between the lips and the teeth. The parts o³, o³,
and o' are capable of being unscrewed for the insertion of the spheres o³, 0º,
and the part o' in which the tube is fixed is connected to the part of
by a bayonet joint.
Air enters the apparatus through holes, j, in the lid j..
The apparatus described with reference to Figures 10, 11, and 12 may
each be provided with several tubes, so that each apparatus may be used
by several persons at the same time.
By constructing respirators, as herein described, a large filtering
surface is provided for the passage of the air inhaled, and the difficulty
of inspiration occasioned by the use of respirators of the ordinary con-
struction is thereby obviated.
:
Having now described the nature of my Invention, and the manner in
which the same is to be performed, I wish it to be understood that I do
not limit myself to the precise details herein described, as the same may
be varied without departing from the nature of my Invention, but I
claim as my said Invention,-
Firstly. The general combination or arrangement of parts constituting
the improved respirator herein-before described and illustrated in
Figures 1 and 2 of the accompanying Drawings, that is to
the com-
say,
bination of a frame covered with a permeable fabric so as to constitute a
permeable case to be worn on the body with an air chamber provided
with inlet and outlet valves, and with a tube and mouth-piece, essentially
as described and illustrated.
Secondly. The means for keeping the filtering medium moist, herein-
before described and illustrated in Figure 3 of the accompanying
Drawings, that is to say, securing to the respirator a vessel containing
water.
Thirdly. The general combination or arrangement of parts con-
stituting the combined' respiratory and inhaling apparatus herein-before
described and illustrated in Figures 4, 5, 6, and 7 of the accompanying
Drawings, that is to say, a case communicating with an air chamber
which is provided with inlet and outlet valves and with a tube termi-

page_text: nating in a mouth-piece, the said case having two compartments,
medicated matter being contained in one compartment and a filtering
medium in the other compartment, which latter compartment is or
may be provided with means for keeping the said filtering medium
moist.
Fourthly. The modification herein-before described of the apparatus
illustrated in Figures 1 to 7, both inclusive, of the accompanying
Drawings, that is. to say, dispensing with the air chamber and the valves
contained therein and substituting valves placed in the mouth-piece or
the pipe thereof, essentially as described and illustrated in Figures 8
and 9.
Fifthly. The general combination and arrangement of parts con-
stituting the improved inhaling apparatus herein-before described and
illustrated in Figures 10 and 11 of the accompanying Drawings, that is
to say, a perforated or reticulated case covered with a filtering medium,
the interior of which case communicates with a pipe terminating in a
mouth-piece furnished with inlet and outlet valves, the said case being
provided with appliances for warming, cooling, medicating, or moistening
the air contained in it, essentially as described.
.
Sixthly. Modifying the apparatus described in the last preceding 2
claim, as herein-before described, with reference to Figure 12 of the
accompanying Drawings, that is to say, placing the aforesaid perforated
case in an outer case for containing water instead of in the aforesaid
pan.
In witness whereof, I, the said James Carrick, have hereunto set 2
my hand and seal, this Twenty-fourth day of October, in the
year of our Lord One thousand eight hundred and seventy-
four.