Improvements in Self-registering Thermometers.
Year: 1894

page_text: Date of Application, 12th Dec., 1894
Complete Specification, Left, 6th Sept., 1895-Accepted, 12th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in Self-registering Thermometers.
I, SIDNEY RICHARDSON, of 356 Brixton Road, in the County of Surrey,
Optician, do hereby declare the nature of this invention to be as follows:-
:-
The invention has for its object improvements in the construction of self-registering
thermometers whereby great compactness is obtained combined with greater security
against accidental breakage and more space on the scale for the insertion of any
desired information.
For this purpose I use a tube formed with two bores; in one form of thermometer
I connect the bores together at one end of the tube by a short tube bent into U form
and containing only one bore, which bent tube is fused to the two-bore tube so that
the ends of its bore shall communicate with the bores of the two-bore tube, and I
fuse to the other ends of the two-bore tube, suitable bulbs or chambers somewhat
after the character of Six's thermometer. The bores are supplied with thermo-
metric fluid and "needle" indices, as is usual with this class of thermometer. By
the two bores being so close together, consequent on being within a single tube,
the indices are capable of being simultaneously set by a single movement of the
magnet.
As a modification the bores may each be sealed at one end and the other end be
provided with a bulb fused thereon. The bores are, as before stated, supplied with
a thermometric fluid and with registering indices. The bores may have their
closed ends both at one end of the tube and the bulbs at the other end, or each end
of the tube may have one bore closed and the other provided with a bulb, in which
latter case one bulb and its connected bore may be supplied with spirit and the
other with mercury, whereby the indices can be simultaneously set by simply
reversing the thermometer.
Dated this 12th day of December 1894.
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.
CUMI UMIE DIECIFICAL
Improvements in Self-registering Thermometers.
I, SIDNEY RICHARDSON, of 356 Brixton Road, in the County of Surrey,
Optician, 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 :-
The invention has for its object improvements in the construction of self-
registering thermometers whereby great compactness is obtained combined with
greater security against accidental breakage and more space on the scale for the
insertion of any desired information in connection with or relating to such
instruments.
For this purpose I use a tube formed with two bores, which may or may not be
made to communicate with each other, provided with a bulb or bulbs and a
registering index or indices according to the particular class of thermometer.

page_text: .
"
My invention is illustrated in the accompanying drawings, and, in constructing
a thermometer somewhat after the character of what is known as a "Six's ther-
mometer as shown at Fig. 1 of the drawings, I use a tube of suitable length having
two bores a and b and I connect these two bores together at one end either by fusing
thereto a short single-bore tube c bent previously into U-form as shown separately
at Fig. 2, in such a manner that the ends of its bore shall respectively communicate
with the bores a and b of the thermometer tube, or a piece of glass in form of a
cup c* as represented at Fig. 2ª, producing a like result. I also fuse to the other
end of said thermometer tube, a bulb d communicating with the bore a, and an
expansion chamber e communicating with the bore b. The bores are supplied with
a column of mercury f, the two ends of which indicate the maximum and minimum
temperatures. The bulb d is filled with spirit and the expansion chamber has a
supply of creosote, whilst the bores a and b are supplied with needle indices, all as
is usual with this class of thermometer known as "Six's." By the two bores being
so close together consequent on being within a single tube, the indices are capable
of being simultaneously set by a single movement of the magnet.
In another form of thermometer, as shown at Fig. 3, I seal the thermometer tube
at one end so as to separate the two bores a and b, whilst the other ends of said
bores each communicate with a bulb fused to that end of the thermometer tube,
whereby the thermometer can be used as a registering hygrometer.
Fig. 4 shows a modified form of the same class of thermometer as that shown at
Fig. 3, but in this instance I seal the bores a and b at opposite ends of the ther-
mometer tube, each bore communicating as before with a bulb d fused to the other end,
so that in this case there is a bulb d at each extremity of the thermometer tube.
The bores are in each case supplied with a thermometric fluid and with registering
indices, and if desired one bore may be supplied with spirit and the other with
mercury and floating indices, whereby the indices can be simultaneously set by
simply tilting the thermometer. It is evident that I may put more than one
registering index in each bore.
Thermometers constructed according to my invention will be found more compact,
less liable to breakage, besides having the advantage of facilitating the readings
and at the same time allowing more space on the scale board for useful information
as compared with thermometers of the ordinary constructions.
It is self-evident that the form of the thermometer may be varied without
departing from the peculiar character of my invention.
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 improved construction of a self-registering thermometer consisting of a
single tube having two bores a and b connected together at one end so as to com-
municate with each other and provided with a bulb and an expansion chamber,
substantially as herein shown and described.
2. In self-registering thermometers, the combination of two separate thermometer
tubes in one single tube having two bores sealed at one end and provided with two
bulbs fused to the end of the thermometer tube, substantially as herein shown and
described and for the purpose stated.
3. In self-registering thermometers, the combination of two separate thermometer
tubes in one single tube having two bores, one end of each of which is sealed whilst
the other end is in communication with a bulb, the said bulbs being placed at
opposite ends of said thermometer tube, substantially as herein shown and
described.
4. In self-registering thermometers, the method of combining two separate
thermometer tubes in a single tube provided with a bulb or bulbs and expansion
chamber as may be required, substantially as herein before shown and described and
for the purpose stated.
5. In self-registering thermometers, the combination of a single tube having two

page_text: bores closed at one end, a bulb communicating with the opposite end of each of said
bores and indices in said bores above or floating in the thermometric fluid,
substantially as herein described.
Dated this 29th day of August 1895.
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.