Improvements in Vaporizer-injectors, Adapted more especially for Producing Local Anesthesia by Bromide of Methyle or other Volatile Liquids.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c., Act, 1883), as required
by the decision of the Comptroller General of the 5th day of May 1897.
Date of Application, 12th Mar., 1896
Complete Specification Left, 2nd Oct., 1896-Accepted, 2nd Jan., 1897
PROVISIONAL SPECIFICATION.
PROVISIONAL SPECIFICATION.
Improvements in Vaporizer-injectors, Adapted more especially for
Producing Local Anesthesia by Bromide of Methyle or other
Volatile Liquids.
We, BERTRAND BOURDALLE of 28 Rue Saint Lazare, Paris France,
Pharmaceutical Chemist and CHARLES BERTAEMET of 16 Place du Havre,
Paris France, Banker, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to vaporizer-injectors such as those for producing
local anesthesia or cold by bromide of methyle, chloride or oxide of methyle or
other volatile liquids. Its objects are chiefly to prevent loss or waste of the liquid,
to allow of the discharge as required of a graduated filiform jet or of spray and to
enable the operator to hold the apparatus and direct and regulate the jet by one
and the same hand.
A vaporizer-injector or apparatus constructed according to our invention is
composed of a closed vessel or receiver having a neck with an inverted cone fitted
to its inner end; this cone has a small hole at its point, and within the cone is
another cone on the lower end of a threaded rod which passes through a hole
tapped in a cap screwed to the vessel neck. The threaded rod has a longitudinal
passage communicating at the lower eud with a hole in the inner cone through
which the liquid is projected.
In order to make a tight joint around the threaded rod any suitable means such
as a stuffing box can be employed, but as these apparatus are charged to a pressure
of at least 12 atmospheres and are therefore liable to waste we prefer to provide
the joint which we will now describe.
We employ an impermeable plug or flanged washer of leather or other material
movable with the rod and combined with a spring which tends to expand the plug
or washer so that the hermeticity of the closing increases as the injector is more
and inore opened and allows more liquid to pass out. The plug or washer rests on
a shoulder in the neck and is held by the flange of a loose collar. The collar is
surrounded by a coiled spring which bears at the lower end upon the said flange
and at the upper end against the cap which is screwed to the neck. The distance
between the two cones before described is regulated by screwing up or unscrewing
the threaded rod which is caused to rotate by means of a piece fixed to the rod and
having radial arms against which the operator can act with the finger of the hand.

page_text: with which he holds the vessel. By thus turning the screw he can more or less
open or close the passage for the liquid from the vessel. To the outer end of the
threaded rod is screwed a nozzle or delivery tube which may be either straight or
curved and have one or more orifices or jets. Or the threaded rod may terminate
in a cap having a hole covered with wire gauze and provided with an outer
removable cover.
When the apparatus is not in use the inner cone fits close against the outer cone
and the spring is then distended; but if the threaded rod be turned to open the
passage way the spring is compressed, it pushes the plug or washer and forces it
more and more strongly against the inside of the neck and thereby ensures a tight
joint, the tightness being increased according to the increase of the volume of liquid
issuing from the apparatus. Thus the greater the pressure tending to cause loss or
escape the tighter is the joint.
By means of this apparatus we obtain naturally with the most volatile liquids a
free pulverization or reduction to spray, and anaesthesia in a few seconds, a result
which has not hitherto been attained with apparatus made of metal.
In a modification of the apparatus which will answer when the pressure is not
very high we form a joint of two leather washers one above the other with or
without a small cord of asbestos or other fibre between them.
In another modification the threaded rod and its cone are placed at the side of or
at right angles to the neck instead of concentrically within it. The rod is in this
case not formed with a passage for the liquid. It has at its inner end a cone of
hard metal which has a slight longitudinal play; and fits into a corresponding cone
communicating at the one side with the liquid in the vessel and at the other side
with the nozzle or outlet. The threaded rod carries as before radial arms by which
to turn it by means of the finger.
Dated this 12th day of March 1806
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.
Improvements in Vaporizer-injectors, Adapted more especially for
Producing Local Anesthesia by Bromide of Methyle or other
Volatile Liquids.
We, BERTRAND BOURDALLE of 28 Rue Saint Lazare, Paris, France,
Pharmaceutical Chemist aud CHARLES BERTHEMET of 16 Place du Havre,
Paris, France, Banker, 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 :-
This invention has reference to vaporizer-injectors such as those for producing
local anesthesia or cold by bromide of methyle, chloride or oxide of methyle or
other volatile liquids. Its objects are chiefly to prevent loss or waste of the liquid,
to allow of the discharge as required of a graduated filiform jet or of spray and to
enable the operator to hold the apparatus and direct and regulate the jet by one
and the same hand.
We will proceed to describe the construction of our improved vaporizer-injectors
with reference to the accompanying illustrative drawings in which:-
Figure 1 is a vertical central section of one arrangement of our apparatus in
the closed condition;
Figure 2 is a part similar view showing the same apparatus when open;

page_text: Figure mustrates a nozzle naving two outlets.
Figure 6 is a detail;
Figure 7 illustrates the mode of holding the apparatus ;
Figure 8 is a part vertical central section of a modification; and
Figure 9 illustrates a further modification.
A vaporizer-injector or apparatus constructed according to our invention is
composed of a closed vessel or receiver A having a neck B with an inverted cone a
fitted to its inner end; this cone a has a small hole at its point, and within the
cone a is another cone c on the lower end of a threaded rod d which passes through
a hole tapped in a cap f screwed to the vessel neck B. The threaded rod d has
a longitudinal passage h communicating at the lower end with a hole i in the inner
cone e through which the liquid is projected.
In order to make a tight joint around the threaded rod d any suitable means
such as a stuffing box can be employed, but as these apparatus are charged to a
pressure of at least 12 atmospheres and are therefore liable to waste we prefer to
employ the joint which we will now describe.
We employ an impermeable plug or flanged washer g of leather or other supple
material movable with the rod d and combined with a spring which tends to expand
the plug or washer so that the hermeticity of the closure increases as the injector
is more and more opened and allows more liquid to pass out. The plug or
washer g rests on a shoulder q in the neck and is held by the flange r of a loose
collar t. The collar is surrounded by a coiled spring s which bears at the lower
end upon the said flange r and at the upper end against the cap which is screwed
to the neck B. The distance between the two cones a and c before described is
regulated by screwing up or unscrewing the threaded rod d which is caused to
rotate by means of a piece fixed to the rod and having radial arms kk against
which the operator can act with the finger of the hand with which he holds the
vessel. By thus turning the screw d he can more or less open or close the passage b
for the liquid from the vessel. To the outer end of the threaded rod d is screwed
a nozzle or delivery tube o which may be either straight as shown in Figure 1, or
curved as shown in Figure 4, and have one orifice or jet or a plurality of orifices
or jets as shown in Figure 5. Or the threaded rod may terminate in a cap y having
a hole covered with wire gauze and provided with an outer removable cover as
shown in Figure 6.
When the apparatus is not in use the inner cone c fits close against the outer
cone a and the spring s is then distended; but if the threaded rod d be turned to
open the passage way 6 the spring s is compressed, it pushes the plug or washer g
and forces it more and more strongly against the inside of the neck B and thereby
ensures a tight joint, the tightness being increased according to the increase of the
volume of liquid issuing from the apparatus. Thus the greater the pressure
tending to cause loss or escape the tighter is the joint.
By means of this apparatus we obtain naturally with the most volatile liquids a
free pulverization or reduction to spray, and anesthesia in a few seconds, a
result which has not hitherto been attained with apparatus made of metal.
In a modification of the apparatus shown in Figure 8 which will answer when
the pressure is not very high we form the joint of two leather washers 9 g¹ one
above the other with or without a small cord of asbestos or other fibre between
them.
In another modification shown in Figure 9 the threaded rod d and its cone care
placed at the side of or at right angles to the neck B instead of concentrically
within it. The rod d is in this case not formed with a passage for the liquid. It
has at its inner end a cone c of hard metal which is held with a slight play in the
end of the rod d by means of a small screw which passes loosely through the side
of the said rod and is screwed into the body of the cone c. The cone c fits into
a corresponding cone 6 communicating at the one side through a passage p with the

page_text: liquid in the vessel and at the other side through a passage with the nozzle or
outlet. The threaded rod d carries as before radial arins by which to tura. it. by
means of the finger or thumb.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we would have it
understood that we are aware that it has before been proposed to construct a
spray producing apparatus employed in producing anesthesia having a discharge
regulator arranged in such a manner that the whole may be held and operated by
one band and also that apparatus of this kind has been provided with a screw
down cone or plug valve to regulate the discharge and we therefore do not make
any claim at large for such arrangements, but we declare that what we
claim is :-
1. The construction and combination of parts of the vaporizer-injectors so that
they are adapted to be held, operated and adjusted by one hand of the operator,
substantially as and for the purpose described and shown more particularly in
Figures 1, 2 and 3.
2. In the improved vaporizer-injector referred to in the preceding claim, the
combination with a receptacle and a projecting nozzle, of an obturating valve
arranged in the neck of the receptacle, and means for enabling said valve to be
operated by one finger of the operator, substantially as described and shown.
3. The movable spring pressed leather jointing washer arranged and operating
substantially as described and shown.
4. The vaporizer-injector having the obturating valve at right angles to the
neck of the receptacle said valve having a certain freedom of movement for the
purpose of adjustment upon its seat, substantially as described with reference to
Figure 9.
Dad thin and lan of Ontabor 1806
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.