An Improved Respirator.
Year: 1894

page_text: Date of Application, zna Apr., 1894
Complete Specification Left, 13th Dec., 1894-Accepted, 16th Feb., 1895
PROVISIONAL DETRATION.
An Improved Respirator.
I FREDERICK BENNETT of 4 Quarry Crescent, Hastings, of no occupation (but
formerly an Assayer of Bullion) do hereby declare the nature of this invention to
be as follows:-
It has for its object to form a respirator that will free the air taken into the
lungs from dust, fog, and other matters in the atmosphere by filtering it through
any suitable material, such for instance as cotton wool, and at the same time
prevent the used or expired air from coming into contact with the filtering
material, by passing it out into the atmosphere, by a sperate channel, all arranged
with suitable valves; also to combine easy facilities for removing the fouled
filtering material and renewing it. My invention is not contrived with the idea of
warming the air, but purifying it by filteration.
Dated this 30th day of March 1894.
An Improved Respirator.
I FREDERICK BENNETT of 4 Quarry Crescent, Hastings, of no occupation, but
formerly an Assayer of Bullion 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 my invention is to form a respirator that will free the air taken
into the lungs from dust, fog, and other matters in the atmosphere by filtering it
through any suitable material, such for instance as cotton wool, and at the same
time prevent the used, or expired, air from coming into contact with the filtering
material, by passing it out into the atmosphere by a separate channel, all arranged
with suitable valves-also to combine easy facilities for removing the fouled
filtering material and renewing it. My invention is not contrived with the idea of
warming the air but purifying it by filtration.
For the purpose of carrying out my invention I form a covering for the external
apertures to the nostrils and the mouth, or a seperate covering to either, these I fit
with chambers or spaces in which are placed layers or discs of cotton wool, or
other filtering material, and the whole is so arranged and combined with valves,
that all inspiration is through the filtering material, while all expiration is direct
into the atmosphere without contact with the filtering material, thus keeping it
free from the carbonic acid & other matters expelled from the lungs in the act of
breathing, the recepticles for the filtering material I make to open and close, so
that the filtering material may be renewed as desired; in their construction I use
frames of any noncorrosive or plated metal, vulcanite, wood or other suitable
substance; combined with wool, silk, cotton or other suitable fabric, and held in
position by elastic cords, clips, or any convenient bandage-and in order that my
invention may be fully understood I shall now proceed to more particularly
describe the same, and shall refer to the several figures in the annexed sheet of
drawings.

page_text: Figs. 1, 2 & 3 show sections of one form of respirator for the mouth & nostrils
combined, the part A being of soft material fitting close over the mouth and
nostrils the frame B is impervious to air, the tubes or passages C pass up the
nostrils and from thence to the inside of the respirator next the mouth-the air
drawn into the lungs in the act of breathing passes through the filter placed in the
valve box D Fig. 3, and when expired, or expelled, it passes out by the valve in
the box D2 Fig. 2-E is a spring ring for keeping F in position. F is a disc of
wire gauze that keeps the filter G in position-G shows a filtering disc of cotton
wool H is one kind of a valve suitable to this form of respirator, it is a disc o
thin metal hinging in the centre, it is fixed in the valve box D against the ring E
by its upper half being soldered against the ring E, leaving the other half, which
forms the valve, free to open & shut against the ring; in Fig. 2 the valve opens
outwards, in Fig. 3 it opens inwards-the valve boxes D and D2 are simply
short tubes, indented to hold the rings in postion-they are open at each end.
D and D2 show the valve boxes empty & filled-the outside front of this form of
respirator is made to open and close, so that the filtering disc G may be removed
& renewed as required-by omitting the tubes or openings C and reducing the
projection II form a respirator for the mouth only.
Figs. 4 and 5 show sections of a respirator for the nostrils only, the principle
and arrangement being the same as in Fig. 1, both respirators are held in position
by elastic cords, or bandages, at the option of the wearer, the respirator for the
nostrils only may be held in position by a slight spring clip as shown at J Fig. 5.
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,
A respirator contrived and constructed so that the air in passing through it into
the lungs is filtered or freed from dust, fog, and other matters in the atmosphere,
and when expelled or expired it passes out without contact with the filtering
material, which is easily renewable; in manner substantially as described.
Dated this 13th day of December 1894.
FREDK. BENNETT.