Year: 1887

page_text: Date of Application, 10th Sept., 1887
Complete Specification Left, 5th June, 1888
-Complete Specification Accepted, 17th Aug., 1.
We, RICHARD Howson of Southfield Terrace, Middlesbrough on Tees in the
County of York, Engineer, and EDWARD CROWE of Grove Hill, Middlesbrough
aforesaid, Engineer, do hereby declare the nature of this invention to be as
follows:-
It consists of an apparatus for testing the strength of the lungs by means of a
pressure gauge with which a pipe with a monthpiece is connected. So far the
construction is of an ordinary and well known character, but it is combined with a
mechanism which is new, & which forms the essential of our invention, namely that
the gauge will not indicate the pressure except on the introduction of a coin into a
slot or receptacle prepared for it.
The manner in which the coin acts is as follows. The blow pipe, or mouthpiece is
connected with a small cylinder in which a piston works. Before the coin is introduced,
the piston rests on a seat, closing the inlet orifice, & is held there by means of a catch
attached to a rocking lever counterweighted at one end. In this condition it is
impossible for the air blown into the mouthpiece to act on the gauge. On the other
hand, when the coin is introduced, it falls onto the opposite end of the lever, &
over balances the counterweight, by which means the catch is released, the
piston rises & allows the air to pass into the gauge, which then indicates the
pressure.
In the mean time the coin has to be removed from the end of the lever in
order that the apparatus may resume its original position, & this is effected as
follows.
When the coin is introduced it rests in the first instance on a shelving plate
attached to the lever, but it cannot fall any further because its edge comes in contact
with a projecting stop. This stop forms part of another lever which is arranged so
that when the piston moves upward, it acts upon that lever & causes the stop to be
removed. The coin then falls off the plate. Thus when the operator ceases blowing
the piston drops, the counterweight forces the catch again into its place, & the
passage to the gauge is locked until a new coin is introduced.
11
ليم
1007
RICHARD HOWSON.
EDWARD CROWE.

page_text: We, RICHARD Howson, of Southfield Terrace, Middlesbrough-on-Tees, in the
County of York, Engineer, and EDWARD CROWE, of Grove Hill, Middlesbrough
aforesaid, Engineer, 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 the construction of an improved pneumometer or apparatus
for testing the lungs by means of a pressure gauge actuated through the medium of
a mouth piece and blow pipe which are constructed and arranged in the ordinary
manner, and this invention consists in arranging in combination therewith certain
mechanism which will prevent the gauge with which the apparatus is provided
being acted upon until a coin has been introduced into a slot or receptacle provided
for its reception.
We will now describe our invention with reference to the accompanying drawings
in which the same letters of reference indicate like parts in all the Figures.
Figure 1. is a front view of the apparatus, Figure 2. a back view of the same
with the back of the case removed and part of the mechanism in section, and
Figure 3. is a side view with the side of the case removed and part of the mechanism
in section. In the last Figure several parts of the mechanism are removed.
The mechanism constituting the subject of this invention is arranged within a
case A. The mouth piece B is connected by the blowing tube b. with the cylinder C.
in which the piston d. is arranged to work freely. In the side of the said cylinder
is an air passage e. leading to the pressure gauge F. To the upper face of the piston d.
is attached the spindle d' which passes through an aperture in the cover of the
cylinder. When the mechanism is in its normal or locked position, the piston d.
rests on a seat at the bottom of the cylinder, C. and closes the inlet orifice, and it is
retained in that position by a catch g. which forms part of the rocking lever G. of
which is the pivot. The cover of the cylinder C. is perforated to allow of the
escape of any air which may be forced past the said piston when the same is
locked, as lastly described. One end of the lever G. is counter-weighted and to the
opposite end is attached the shelving plate g¹. The lever H. which is pivoted to the
last mentioned end of the lever G. is counter-weighted at one end and is turned up
or provided with a projecting stop at the opposite end. The lever H. is so arranged
in reference to the spindle d¹ that the latter in its upward movement will come into
contact with the weighted end of the said lever and will turn it on its pivot whereby
the coin is released, as hereinafter described. I. is the shoot down which the coin
passes from the slot in the case A. to the shelving plate g¹.
The action of the mechanism hereinbefore described is as follows:-
:-
When the mechanism is in its normal position the piston d. is retained by the catch g.
against its seat at the lower end of the cylinder C., consequently the air inlet is closed,
on a coin being passed through the slot k. it slides down the shoot I. on to the

page_text: shelving plate g where it is retained, for the time, by the turned up end of the
lever H., the weight of the said coin overbalances the counter weight and causes
the lever G. to turn on its pivot, whereby the catch g. is disengaged from the end of
the spindle d.. On air being blown through the tube b. the piston d. rises to the top
of the cylinder C., closes the perforations therein and opens the passage e. through
which the air passes to the gauge. In its upward movement, the spindle d¹ catches
the lever H. and, turning it on its pivot, causes the turned up end thereof to be
moved from the end of the shelving plate g¹, thus allowing the coin to slide off, the
consequence being that on the descent of the piston the lever G. resumes its normal
position and again locks the mechanism.
We wish it to be understood that we do not desire to confine this invention to the
exact details hereinbefore described as they admit of many modifications, for instance,
a flexible diaphragm or a hinged valve may be substituted for the piston d., and
springs may be used instead of counterweights. We have herein before referred to
the pressure gauge as being an ordinary dial gauge, but, if desired, a mercurial
column or any other suitable gauge may be substituted therefor, as will be readily
understood.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:
First. In pneumometers or lung testing apparatus, the interposition, between the
mouth piece and the indicating gauge, of the cylinder C., piston d., with spindle d¹,
and the lever G., with catch g., the whole being constructed and arranged substantially
as, and for the purpose hereinbefore described.
Secondly. In pneumometers or lung testing apparatus, the combination and
arrangement, in connection with the lever G., of the shelving plate gl and lever H.,
substantially as, and for the purpose, hereinbefore described.
And thirdly. In pneumometers or lung testing apparatus, the interposition, between
the mouth piece and the indicating gauge, of the mechanism for preventing the passage
of forced air to the gauge until a coin has been inserted into the apparatus, substantially
as hereinbefore described.
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