Improvements in and connected with Pressure Gauges for Pneumatic Tyres and other similar Air or Gas Inflated Articles.
Year: 1892

page_text: Date of Application, 4th Aug., 1892
Complete Specification Left, 5th Oct., 1892-Accepted, 12th Nov.,
1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by SCHAFFER AND BUDENBERG, of Buckau,
Madgeburg, in the Kingdom of Prussia and German Empire, Manufacturers
of Pressure Gauges.]
Improvements in and connected with Pressure Gauges for Pneumatic
Tyres and other similar Air or Gas Inflated Articles.
I, WILLIAM EDWIN HEYS of 70 Market Street, Manchester, in the County of
Lancaster, Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to pressure gauges which may be employed to denote the
pressure in pneumatic tyres and in other similar gas and air inflated articles.
According to these improvements the pressure gauge is made of the Bourdon
type, and of the requisite small dimensions.
At the back or side of the gauge there is arranged a through tube with a branch
communicating with the gauge tube. A pair of horns may also be formed upon
some part of the gauge or through tube for the purpose of enabling the gauge to
be more securely held and manipulated when required.
The outer part of the through tube is screwed or adapted to be connected with
the inflating pump or apparatus, and the opposite end is screwed or adapted to be
connected with the inflating valve or with a nozzle communicating with the interior
of the tyre or other article with which it is to be used.
If the gauge is to be connected directly with the interior of the tyre, a back
pressure valve, or a cap or plug is inserted in the through tube beyond the branch
tube, so that the compressed air or gas can always have access to the branch tube
and gauge, and its escape be prevented by the back pressure valve cap or plug. If
a back pressure valve be employed in the through tube, the tyre may be inflated
and deflated through it, and the ordinary inflating valve may be omitted.
without back pressure valve
cap or plug may be employed only
during the process of inflation if preferred, in which case one end of the through
tube is connected with the air pump nozzle, and the other end with the inflating
valve.
The
gauge,
any
Dated this 3rd dox of Anomat. A.D. 1892.
WILLIAM E. HEYS.
COMPLETE SPECIFICATION.
Improvements in and connected with Pressure Gauges for Pneumatic
Tyres and other similar Air or Gas Inflated Articles.
I, WILLIAM EDWIN HEYS, of 70 Market Street Manchester in the County of
Lancaster, Fellow of the Chartered Institute of Patent Agents, 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 pressure gauges which may be employed to indicate the
pressure in pneumatic tyres and in other similar air or gas inflated articles.
According to these improvements the pressure gauge is made of the Bourdon
type, and of the requisite small dimensions.

page_text: At the back or side of the gauge there is arranged a straight or bent through
tube with a branch communicating with the bent or "Bourdon" tube of the gauge.
A pair of horns may also be formed upon some part of the gauge or of the through
tube, for the purpose of enabling the gauge to be more securely held and manipu-
lated when required.
The accompanying drawings illustrate a gauge constructed according to these
improvements, and in what manner it may be employed.
Figure 1 is a front view, and Figure 2 a side view of the gauge as applied to an
ordinary inflation valve of a pneumatic tyre.
Figure 3 represents in plan, the combination of the gauge with an inflator, and a
short length of inflating tube.
Figure 4, is a vertical section of a modification.
A is the pressure gauge, and B'the through tube which is preferred to be straight
as shewn, but which may be bent to a right angle if preferred. A branch is formed
from the interior of the through tube to the interior of the Bourdon tube in the
gauge, as indicated by the dotted lines in Figure 2, so that the pressure existing in
the through, tube, and in parts with which the through tube communicates, may be
indicated by the gauge in the usual way.
Each end of the through tube is screwed for connection directly or indirectly with
the inflator and with the tyre or other article the pressure within which is required
to be indicated.
2
As shewn by Figure's 1 and 2, the lower end of the tube B has an internal screw
thread, and its upper, end an external thread of the same pitch. This form is con-
structed for use with the valve employed in connection with the Dunlop, pneumatic
tyres. The plug C is first, removed from this valve, and is then inserted into the upper
part of B, and secured by the union D, which also has been removed from the valve.
The plug and union are shewn in place upon the through tube in Figure 2,, and
above it in Figure 1. There is an indiarubber back pressure valve around the
plug C which will prevent the escape of air outwards through the plug. The
tyre H may now be inflated through the plug C, and since the back pressure valve
is between the side branch to the Bourdon tube and the upper end of the through
tube B, the gauge will give a constant indication of the pressure. It will be evident
that the gauge may be applied in other ways, and to suit special conditions.
In the modification represented by Figure 3, the lower end of the, through tube B,"
is screwed upon the nozzle of the inflator E, and the flexible inflating tube I, is
secured upon the opposite end of B. In the act of inflating, the gauge is held by
the.horns G, in one, hand, whilst the inflator is worked by the other. With this
arrangement, the pressure during inflation only is indicated.
If, instead of applying the gauge to an ordinary inflator valve as already herein-
before described, it be desired to apply it to a nozzle on the tyre, or to have in the
through tube a back pressure valve independent of that in the inflating valve, the
modification represented in vertical section by Figure 4 may be employed. The
construction of this modification is practically the same as that illustrated by
Figures 1 and 2. As before, A is the gauge communicating with the through
tube B., and C is the screwed plug with the back, pressure valve having its orifice
surrounded by an indiarubber tube which lifts to permit the ingress of the air but
prevents its egress. In substitution for the union, a flange D', is formed upon the
plug C, as shewn.
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 :-
:-
1. The combination with a pressure gauge of the Bourdon type, of a through tube
communicating with the Bourdon tube, substantially as and for the purpose herein-
before described and. as illustrated by the accompanying drawings.
2. A pressure gauge for pneumatic tyres and similar air and gas inflated articles,
having a port leading from the Bourdon tube into a tube or passage which is
*

page_text: capable of being connected at each end with the inflated article and with an
inflator respectively, and which may or may not contain a back-pressure valve ;
constructed and arranged substantially as hereinbefore described and as illustrated
by the accompanying drawings.
Dated this 29th day of September A.D. 1892.
WILLIAM E. HEYS.