Improvements in in or connected with Means or Apparatus for Indicating or Recording Temperatures, or for Acting under the Influence of Changes of Temperature.
Year: 1896

page_text: Date of Application, 25th Jan., 1896
Complete Specification Left, 16th Sept., 1896-Accepted, 17th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in
in or connected with Means or Apparatus for
Indicating or Recording Temperatures, or for Acting under the
Influence of Changes of Temperature.
We, WILLIAM FIDDES, of the Gas Works, Bristol, in the County of Gloucester,
Gas Engineer, and W. and B. COWAN LIMITED of Smith Square Works in the
City of Westminster, do hereby declare the nature of our invention to be as
follows:-
This invention has for its object to provide a device which is very sensitive to
changes of temperature, and which is adapted for use for indicating temperature, or
for regulating, or controlling, movements which are to be varied with changes in
temperature, and in cases generally where a device affected by changes in temperature
is required.
According to this invention we employ a closed tube or vessel containing fluid the
said tube, or vessel, altering its form, or position, when the contained fluid expands,
or contracts, under changes of temperature. The said tube, or vessel, is connected
by any suitable means with a pointer, or with the device to be acted upon.
The fluid is under pressure in the tube or vessel and to effect this the following is
a suitable method. The tube, or vessel, is furnished with an end-piece, through which
two holes are made transverse to each other. In one of these holes, a sealing
substance, such as lead, is introduced, and through the other the fluid is introduced under
pressure; a continuation of this hole being made through, or left in, the filling
material of the other hole. When the fluid has been introduced by a force pump, or
other device, to a sufficient pressure (which, if the tube, or vessel, is to act for lower
temperatures, than that at which the tube, or vessel, is charged will be made to cause
a deformation of the tube, or vessel) the lead or filling material is compressed so as to
close the charging hole and the force pump, or the like, is then removed. The
device thus charged is then secured and connected to a pointer, or the apparatus upon
which it is to act, in such a manner that when its form, or position, changes, under
changes of temperature, the pointer, or apparatus, to which it is connected will be
moved in one, or the other, direction. If the device is to be used in such situations as
to be acted upon by the temperature of a place wherein it is not convenient to put the
tube, or vessel, itself, a tube, or the like, in communication with the interior of the
first named tube, or vessel, may be used, this second tube or the like of course also
being charged with the fluid under pressure, and being inserted in the place the
temperature whereof is to act; for instance, such a second tube may be let into
the pockets, or closed tubes, which are placed in passages, or pipes, at gas works, for the
insertion of thermometers, the first named tube, or vessel, and indicator being situate
outside in convenient position for reference.
Dated this 25th day of January 1990.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.

page_text: Improvements in or connected
with Means or Apparatus for
Indicating or Recording Temperatures, or for Acting under the
Influence of Changes of Temperature.
We WILLIAM FIDDES of the Gas Works Bristol in the County of Gloucester
Gas Engineer and W. & B. CoWAN LIMITED of Smith Square Works in the
City of Westminster 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 for its object to provide a device which is very sensitive to
changes of temperature, and which is adapted for use for indicating temperature, or
for regulating, or controlling, movements which are to be varied with changes in
temperature, and in cases generally where a device affected by changes in
temperature is required.
According to this invention we employ a closed tube, or vessel, containing fluid;
the said tube, or vessel; altering its form, or position, when the contained fluid expands,
or contracts; under changes of temperature. The said tube, or vessel, is connected
by any suitable means with a pointer, or with the device to be acted upon.
The fluid is under pressure in the tube, or vessel, and to effect this the following
is a suitable method.
We refer to the accompanying drawing.
Figure 1 shews in longitudinal section, Figure 2 in plan, Figure 3 in end view
and Figure 4 in perspective a part of a tube with the end piece applied.
Figure 5 illustrates the tube, or vessel, applied in practice to operate under rise
and fall of temperature a lever G, which can be connected to any device. to be
operated.
The vessel constituted by the tube F is furnished with an end pièce through
which two holes f3 and are made transverse to each other. In one of these
holes () a sealing substance, such as lead, is introduced, and through the other
hole (3) the fluid is introduced under pressure, a continuation of this hole being
made through, or left in, the filling material of the other hole. When the fluid
has been introduced by a force pump, or other device, to a sufficient pressure
(which, if the tube, or vessel, is to act for lower temperatures, than that at which
the tube, or vessel, is charged will be made to cause a deformation of the tube,
or vessel) the lead, or filling material in the hole is compressed so as to close
the charging hole f³ and the force pump, or the like, is then removed. The device
thus charged is then secured and connected at f' or otherwise to a pointer, or the
apparatus upon which it is to act, in such a manner that when its form, or position,
changes, under changes of temperature, the pointer, or apparatus, to which it is
connected, will be moved in one, or the other, direction. If the device is to be used in
such situations as to be acted upon by the temperature of a place wherein it is not
convenient to put the tube, or vessel, itself, a tube, or the like, in communication
with the interior of the first named tube, or vessel, may be used, this second tube,
or the like, of course, also being charged with the fluid under pressure and being
inserted in the place the temperature whereof is to act, for instance, such a second
tube may be let into the pockets, or closed tubes, which are placed in passages, or
pipes, at
gas works, for the insertion of thermometers, the first named tube, or
vessel, and indicator being situated outside in a convenient position for reference.
We prefer to use alcohol under pressure for charging the tube, or vessel, F, as
this is very sensitive to changes of temperature

page_text: 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 :-
1. A device for indicating, or recording, temperatures, or for acting under the
influence of changes of temperature, consisting of, or comprising, a closed tube,
or equivalent vessel, containing alcohol, or other fluid under pressure, and connected
with a pointer, or other device to be acted upon; substantially as hereinbefore
described.
2. A device for indicating, or recording, temperatures, or for acting under the
influence of changes of temperature consisting of, or comprising, a closed tube, or
equivalent vessel, containing alcohol, or other fluid, charged thereinto to such a
pressure as to distort the said tube, or vessel the said tube or vessel being con-
nected with a pointer, or other device to be acted upon; substantially as herein before
described.
3. In devices for the purposes indicated a tube or equivalent vessel having an
end piece through which holes are inade transverse to each other, a filling material
being placed in one hole and perforated for the passage of fluid under pressure
the said filling material being afterwards compressed to confine the fluid under pressure
in the said tube, or vessel, substantially as hereinbefore described.
4. The arrangement and combination of parts constituting an apparatus for
indicating or recording temperatures, or for acting under the influence of changes
of temperature; as hereinbefore described and illustrated in the accompanying
drawing.
Dated this 16th day of September 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.