IMPROVE- MENTS IN APPARATUS FOR ASCERTAINING THE TEMPERATURE OF FLUIDS
Year: 1875

page_text: LETTERS PATENT to Samuel Diplock, of 92, Regina Road, Tollington
Park, in the County of Middlesex, for the Invention of "IMPROVE-
MENTS IN APPARATUS FOR ASCERTAINING THE TEMPERATURE OF FLUIDS
Scaled the 18th June 1875, and dated the 19th April 1875.
PROVISIONAL SPECIFICATION left by the said Samuel Diplock at
the Office of the Commissioners of Patents, with his Petition, on
the 19th April 1875.
I, SAMUEL DIPLOCK, of 92, Regina Road, Tollington Park, in the
County of Middlesex, do hereby declare the nature of the said Inven-
tion for IMPROVEMENTS IN APPARATUS FOR ASCERTAINING THE TEMPERATURE OF
FLUIDS CONTAINED IN PIPES, BOILERS, OR OTHER CLOSED VESSELS," to be as
follows:-
―:
This Invention has for its object improvements in apparatus for ascer-
taining the temperature of fluids contained in pipes, boilers, or other
closed vessels. For this purpose I fix on the top or other part of the
vessel a tap or cock terminating in a screw socket. The waterway

page_text: through the tap or cock I make cylindrical; I fit to it so as to enter
freely a metal tube provided with a collar, having a screw upon it
corresponding with that within the socket. Into this tube the lower
part of a thermometer is inserted. The thermometer passes through the
tube from end to end, and a packing is applied so that the tube is com-
pletely closed.
The tap or cock of the special construction above described remains
permanently fixed upon the boiler, pipe, or other apparatus, but the
thermometer and the tube into which it is fitted is only applied when
the temperature is to be observed. Then when the tap or cock is still
closed the tube attached to the thermometer is inserted into the water-
way of the tap or cock, which it fits, and consequently closes, so that
the tap or cock may now be opened without admitting of any escape of
the water or fluid, even though it be under pressure. The tube is then
pressed home until the bulb of the thermometer is in the midst of the
fluid of which the temperature is to be tested. The screw collar on the
tube is then made to enter the corresponding socket on the tap or cock,
and so the thermometer becomes fixed in its place where it is allowed to
remain until the observation is complete.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Samuel Diplock in the Great Seal Patent Office
on the 18th October 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAMUEL
DIPLOCK, of 92, Regina Road, Tollington Park, in the County of
Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of April, in the year
of our Lord One thousand cight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said Samuel Diplock, Her special
license that I, the said Samuel Diplock, my executors, administrators,
and assigns, or such others as I, the said Samuel Diplock, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term

page_text: therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man an Invention for "IMPROVEMENTS IN
APPARATUS FOR ASCERTAINING THE TEMPERATURE OF FLUIDS CONTAINED IN PIPES,
BOILERS, OR OTHER CLOSED VESSELS," upon the condition (amongst others)
that I, the said Samuel Diplock, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Samuel Diplock, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say:
This Invention has for its object improvements in apparatus for ascer-
taining the temperature of fluids contained in pipes, boilers, or other
closed vessels. For this purpose I fix on the top or other part of the
vessel a tap or cock terminating in a screw socket. The waterway
through the tap or cock I make cylindrical; I fit it so as to enter
it freely a metal tube provided with a collar having a screw upon it
corresponding with that within the socket. Into this tube the lower
part of a thermometer is inserted. The thermometer passes through
the tube from end to end, and a packing is applied so that the tube is
completely closed.
The tap or cock of the special construction above described remains
permanently fixed upon the boiler, pipe, or other apparatus, but the
thermometer and the tube into which it is fitted is only applied when the
temperature is to be observed. Then when the tap or cock is still closed
the tube attached to the thermometer is inserted into the waterway of
the tap or cock, which it fits, and consequently closes, so that the tap or
cock may now be opened without admitting of any escape of the water or
fluid, even though it be under pressure. The tube is then pressed home
until the bulb of the thermometer is in the midst of the fluid of which
the temperature is to be tested. The screw collar on the tube is then
made to enter the corresponding socket on the tap or cock, and so the

page_text: thermometer becomes fixed in its place, where it is allowed to remain
until the observation is complete.
The Drawings hereunto annexed show an apparatus constructed as
above described.
Figure 1 shows an elevation of the apparatus; Figure 2, a front 5
elevation of the thermometer, with its outer protecting tube; Figure 3,
a side elevation; and Figure 4, a vertical cross section of the same.
A is the tap, which is to be fitted on to the pipe or boiler or other
closed vessel; B, a screw socket on the outlet of the tap; C, a cylindrical
metal tube fitting the waterway of the shell of the tap and the cylin- 1
drical hole which is formed through its plug. Within this tube is
contained the bulb and lower part of the thermometer. The tube at its
upper end screws into a collar D, carrying the gauge index or face; for
convenience this is made circular, and the upper end of the tube of the
thermometer is bent to the arc of a circle, as shown. Packing is inserted 1
at E, so as completely to close the upper end of the tube C; F is a glass
face to protect the upper end of the thermometer tube and the dial from
injury. A screw thread is cut upon the exterior of the collar D, so that
it may be screwed into the screw socket on the outlet of the tap, as
shown at Figure 1.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I claim, the con-
struction of apparatus substantially in the manner hercin-before described
for ascertaining the temperature of fluids contained in pipes, boilers, or
other closed vessels.
In witness whereof, I, the said Samuel Diplock, have hereunto set
other closed vessels.
In witness whereof, I, the said Samuel Diplock, have hereunto set
my hand and scal, this Eighteenth day of October, in the year
of our Lord One thousand eight hundred and seventy-five.