Improvements in Respirators.
Year: 1896

page_text: Date of Application, 19th May, 1895
Complete Specification Left, 18th Feb., 1897-Accepted, 10th Apr., 1897
NA
ATION.
Improvements in Respirators.
1, ARTHUR ROWLEY MOODY of Richmond House, Shelton, Stoke-on-Trent,
County of Stafford, Doctor of Medicine, do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in respirators, the object being to provide
a respirator which can be used with comfort, say by workmen engaged in occupations
injurious to health, or by other people.
By my invention the wearer is only able to inhale purified air drawn into the
respirator, and it is not open to the objection that many other respirators possess,
riz. that the breath is again inhaled, as suitable means are provided for carrying
off the exhaled breath. My respirator has also the additional advantage that the
wearer can carry on conversation with comfort.
In carrying out my invention the main portion of the respirator may be made
of metal preferably in the shape of a hollow cone; which may be provided with
suitable flap valves opening outwards to allow of the escape of the breath exhaled,
but preventing the admission of external air into the interior of the respirator. A.
chamber or nozzle is formed connected with the interior by a perforated diaphragm
and closed at the outer end by a perforated and preferably removable cap. Between
the perforated diaphragm and the cover is packed medicated cotton wool, or other
filtering medium, and the air inhaled by the wearer has to pass through the filtering
medium before it can reach the interior of the respirator.
The respirator is adapted to fit closely over the nose and mouth of the wearer so
that no air can enter the respirator except through the filtering nozzle, and this
portion of the apparatus may be formed of flexible rubber tubing or the like
connected to the conical body of the respirator by a soft metal lining or connector,
this latter serving to allow of the shape of the rubber edging being altered to fit
against faces of different contour.
The respirator can be kept in position by a strap and buckle fastening at the back
of the head, or by spring clips, or other suitable means.
By providing a removable cap for the nozzle, the wool or other filtering medium
may be removed and the chamber recharged from time to time.
Although I have described the air chamber or nozzle at the end of the apparatus,
it will be understood that modifications may be made-for example if a larger area
for the admission of air were required the sides of the respirator might be made of.
a perforated material,-wire gauze for instance-covered with cotton wool or other
suitabie material, and enclosed by an outer casing likewise perforated.
Dated this 19th day of May 1896.
BOULT & WADE,
Agents for the Applicant.

page_text: .
Improvements
In
Respirators.
I, ARTHUR ROWLEY MOODY, of Richmond House, Shelton, Stoke-on-Trent,.
County of Stafford, Doctor of Medicine, 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 relates to improvements in respirators its object being to provide
a respirator which can be used with comfort, say by workmen engaged in occupations
injurious to health or by other people.
By my invention the wearer is only able to inhale purified air drawn into the
respirator, and it is not open to the objection that many other respirators possess,
ris that the breath is again inhaled as suitable means are provided for carrying
off the exhaled breath. My respirator has also the additional advantage that the
wearer can carry on conversation with comfort.
In the accompanying diagrams,
Figure represents the side elevation
Figure 2 front elevation, and
Figure 3 a horizontal longitudinal section, all of one form of the improved
respirator.
The body A of the respirator is preferably conical as shown, and may be
constructed of metal or celluloid for instance. It is provided with flap valves A
of rubber, or leather, which open outwards to permit the escape of the breath
exhaled, but prevent the admission of external air, which might be foul, vitiated,
explosive etc., to the interior of the body A. A cylindrical chamber or nozzle B
hereinafter described as the air-filter is attached to the fore end of and communicates
with the interior of the truncated conical body A, by a perforated diaphragm C
which here consists of a circular disc of wire gauze; the fore or outer end of the
air-filter is closed by a removable cap D, which has perforations D' and is attached
to the body A by the bayonet joint D. The interior of the air-filter B; between the
head of this cap D₁ and the aforesaid perforated diaphragm C is packed with
medicated cotton wool or other filtering medium E; all the air inhaled by the
wearer has to pass through this filtering medium before it can reach him by way
of the interior of the body A.
The respirator body A is adapted to fit closely over tire nose and mouth of the
wearer, so that no air may enter the respirator except through the filtering nozzle or
fore chamber B. The marginal portion at the larger end of the body A has to fit
closely and easily to the wearer's face; it may be formed of flexible rubber tubing F,
inflated by means of the tube, nozzle and stop cock G, with air, or of other
suitable flexible material connected to the conical respirator body A by an elastic or
flexible connecting strip H which latter may be formed of the same material and in
one piece with the tubing F. A flexible annulus K of thin metal is provided as a
bearing or support for the rubber tubing F; and is itself supported by several small
metal, or other brackets L from the conical body A. By judicious distortion of the
ring K the flexible tubing F is made permanently to assume such a form that
different parts of it are at different distances from the body A; so that the outer face
of the tubing F shall possess the contour of the wearer's face and thereby make good
contact with the latter to the prevention of any passage of air between the wearer
and apparatus.
After deformation of both ring K and tube F to suit profile of
contact on wearer's face the tube F is caused by the ring K to maintain its distorted
form or position.
The respirator may be retained in position by a strap and buckle M secured around
the wearer's head or by spring clips or otherwise.

page_text: Provision is made by the removable cap D for the introduction of fresh charges of
medicated wool or other air filtering medium E into the air filter B, as necessity
therefor may arise. Instead of the perforated cap or lid D D' a much larger area
for the ingress of air to the respirator might be provided by the formation of the
whole or part of the respirator body as a perforated hollow cone covered or wrapped
with cotton wool or other suitable wadding or material and enclosed in an external
concentric conical casing similarly perforated.
The air flap-valves A may be kept closed when the wearer is inhaling by light
springs or small weights.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. In a respirator the combination with the hollow body of a filter for the air
inhaled and non-return valves for the breath exhaled substantially as described.
2. In a respirator of the kind described a flexible marginal portion on the hollow
body to enable it to fit easily and closely the face of the wearer.
3. In a respirator of the kind described the combination with the hollow body
of a flexible inflatable annulus F and an elastic connecting strip H for the purpose
specified.
4. In a respirator of the kind described the combination with the hollow body
and flexible inflatable annulus F of a plastic metallic support such as K for the
latter, for the purpose specified.
5. In a respirator of the kind described an air-filter with perforated walls one
of which is constituted by a removable cap or cover for the purpose described.
6. The combination and arrangement of parts constituting the complete respirator
substantially as and for the purpose described and illustrated in the accompanying
drawings.
D
1
107
A. ROWLEY MOODY.
Boult & Wade,
Agents for the Applicant.