Year: 1888

page_text: I GEORGE THOMAS of the firm of George Thomas and Company of 28 Deansgate
Manchester in the County of Lancaster Engineer a communication from abroad by
Paul Fischer of Lyons in the Republic of France Manufacturer do hereby declare the
nature of this Invention to be as follows:-
This invention refers particularly to the Invention for which Letters Patent
No. 2969 were granted to Frederick Hochuli (a communication from the above named
Paul Fischer) on the 2nd day of March 1886 the object of this present Invention being
to improve the apparatus to render it more sensitive and to increase its usefulness.
The first improvement relates to the diaphragms employed in such apparatus each
of which diaphragms is preferably formed of a circular metal disc with corrugations
concentric to the centre. I now propose to strengthen the diaphragm by the addition
of one two or more superposed rings or supplementary diaphragms to form a spring;
this ring or each ring when more than one is employed is preferably corrugated so as
to correspond with the corrugations of the disc diaphragm the outer edges of the ring or
rings and disc diaphragm being secured in any convenient manner to the casing which
surrounds and contains them.
The second improvement consists in certain structural arrangements and novel
combinations of the parts in order to render the apparatus more sensitive as a
temperature regulator.
In carrying out this part of the Invention I make the lower part of the apparatus
which is placed in the vessel kier or room in which a certain temperature is to be
maintained of a hollow cylindrical or other vessel filled with mercury or other fluid or
substance readily affected by change of temperature. The upper part of this vessel is
closed by a diaphragm preferably provided with a ring or rings as described in the
first part of this Invention. The diaphragm supports a metal plug or piston fitted
accurately in a recessed part of the lower casing and on this plug rests a hollow
spindle fitted in the upper part of the casing which screws into the lower part and
is secured in position by a set screw or other means. The upper end of the hollow
spindle bears upon another diaphragm preferably with a ring or rings like the first

page_text: closing one side of the chamber forming part of the passage for stean or other medium
by means of which the heating or cooling is effected. Above the diaphragm and
resting upon it is the stem of a valve which regulates the admission of the steam or
other heating or cooling medium and below the valve there is a pipe or other com-
munication to the heating or cooling arrangements.
In operation so long as the desired temperature is maintained in the vessel or kier
to which the apparatus is applied the expansive action of the mercury or other fluid
employed in the latter forces up the lower diaphragm the hollow spindle and the upper
diaphragm whereby the steam or other admission valve is kept closed and the supply
of steam or other medium is shut off from the vessel or kier until the temperature
therein falls sufficiently to allow the lower diaphragm to sink and the steam or other
medium admission valve to open eventually assisted by a spring or weight if required
thereby allowing steam or other heating medium to flow into the vessel or kier or the
heating arrangement until the temperature again rises to the prescribed limit.
In case the apparatus should be used for cooling down the liquid to a certain degree
of temperature naturally the reverse action would take place i.e. the contraction of the
liquid would have to close the valve whilst the expansion would open the valve for
admitting the cooling medium.
The apparatus is so arranged that the distance between the diaphragms can be
adjusted as required by screwing the two parts of the casing nearer to or farther from
each other or by other means. The parts are so arranged that very little heat or cold
can be conducted from the upper to the lower part of the vessel and to further this end
the air is exhausted from the hollow spindle which is then hermetically sealed.
1

page_text: Improvements in Temperature Regulating Apparatus.
I GEORGE THOMAS of the firm of George Thomas and Company of 28 Deansgate
Manchester, in the County of Lancaster Engineer a communication to me from
abroad by Paul Fischer of Lyons in the Republic of France Manufacturer, 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 refers particularly to the Invention for which Letters Patent
No. 2969 were granted to Frederick Hochuli (a communication from the above named
Paul Fischer) on the 2nd day of March 1886 the object of this present Invention being
to improve the apparatus to render it more sensitive and to increase its usefulness.
The first improvement relates to the diaphragms employed in such apparatus each
of which diaphragms is preferably formed of a circular metal disc with corrugations
concentric to the centre. I now propose to strengthen the diaphragm by the addition
of one two or more superposed rings or supplementary diaphragms to form a spring;
this ring or each ring when more than one is employed is preferably corrugated so as
to correspond with the corrugations of the disc diaphragm the outer edges of the ring
or rings and disc diaphragm being secured in any convenient manner to the casing
which surrounds and contains them.
The second improvement consists in certain structural arrangements and novel
combinations of the parts in order to render the apparatus more sensitive as a
temperature regulator.
In carrying out this part of the Invention I make the lower part of the apparatus
which is placed in the vessel kier or room in which a certain temperature is to be
maintained of a hollow cylindrical or other vessel filled with mercury or other fluid or
substance readily affected by change of temperature. The upper part of this
vessel is closed by a diaphragm preferably provided with a ring or rings as described
in the first part of this Invention. The diaphragm supports a metal plug or piston
fitted accurately in a recessed part of the lower casing and on this plug rests
a hollow spindle fitted in the upper part of the casing which screws into the lower
part and is secured in position by a set screw or other means. The upper end of the
hollow spindle bears upon another diaphragm preferably with a ring or rings like the
first closing one side of the chamber forming part of the passage for steam or other
medium by means of which the heating or cooling is effected. Above the diaphragm
and resting upon it is the stem of a valve which regulates the admission of the steam
or other heating or cooling medium and below the valve there is a pipe or other
communication to the heating or cooling arrangements.
And in order that this Invention may be fully understood and readily carried into
effect I will describe the accompanying Sheet of Drawings reference being had to the
figures and letters marked thereon.
Figure 1 is a sectional elevation of the improved temperature regulating apparatus.
In this view. a designates the lower part of the apparatus which is placed in the
vessel kier or room in which a certain temperature is to be maintained. This part a
is a hollow cylindrical or other suitably shaped vessel filled with mercury or other
fluid or substance readily affected by change of temperature. The part a is supported

page_text: in a casing b and the top of the part a is closed by an improved diaphragm c composed
of a circular metal disc with corrugations concentric to its centre this disc being
strengthened by one two or more supplementary corrugated rings or diaphragms
superposed to form a spring. These rings may be placed on both sides of the disc
instead of on one side only as shown. The outer edges of the disc and rings are preferably
bent over and secured between the parts 661 of the lower casing as shown in
Figs. 2, 3 and 4. In the part of the casing is an accurately fitted plug or piston d which
rests upon the diaphragm c and supports the coned end of a hollow spindle e. This
hollow spindle e is fitted in the lower portion of the upper casing & which screws into
the middle part the parts and 62 being fixed in their relative positions when set
by a screw and the upper end of the said spindle bears against a second improved
diaphragm c' similar to the diaphragm c above described. The upper side of the
second diaphragm c supports the stem g' of the valve g which is guided by its fins or
wings g² and controls the admission of the heating or cooling fluid from the pipe to
the pipe which is in communication with the vessel kier room etc., to which the
temperature regulating apparatus is applied.
In operation so long as the desired temperature is maintained in the vessel or kier
to which the apparatus is applied the expansive action of the mercury or other fluid
employed in the latter forces up the lower diaphragm c the hollow spindle e and the
upper diaphragm c¹ whereby the steam or other admission valve g is kept closed and
the supply of steam or other medium is shut off from the vessel or kier until the
temperature therein falls sufficiently to allow the lower diaphragm c to sink and the
steam or other medium admission valve g to open eventually (assisted by a spring or
weight, not shown, but which may be used if required) thereby allowing steam or other
heating medium to flow from the pipe h through the pipe i into the vessel or kier or
the heating arrangement until the temperature again rises to the prescribed limit.
In case the apparatus should be used for cooling down the liquid to a certain degree
of temperature naturally the reverse action would take place i.e. the contraction of the
liquid would have to close the valve g whilst the expansion would open the valve for
admitting the cooling medium.
The apparatus is so arranged that the distance between the diaphragm c c¹ can be
adjusted as required by screwing the two parts b¹³ of the casing nearer to or farther
from each other or by other means. The parts are so arranged that very little heat or
cold can be conducted from the upper to the lower part of the vessel and to further
this end the air is exhausted from the hollow spindle e which is then hermetically
sealed.
Having now particularly described and ascertained the nature of this said
Invention and in what manner the sane is to be performed I declare that what I
claim is-
The herein described improvements in temperature regulating apparatus said
improvements consisting first in combining with the ordinary circular metal disc
diaphragm one two or more superposed rings or supplementary diaphragms to form a
spring secondly in the novel constructions and combined arrangements of the parts all
substantially as and for the purposes set forth.
Dated this 19th day of November 1888.