Improvements in Thermometers.
Year: 1895

page_text: Date of Application, 27th Feb., 1895
Complete Specification Left, 28th Nov., 1895-Accepted, 28th Dec., 1895
Improvements in Thermometers.
I, JAMES JOSEPH HICKS, of 8 Hatton Garden, in the County of London,
Meteorological Instrument Maker, do hereby declare the nature of this invention
to be as follows:-
The invention relates to that class of thermometer in which a recording indicator
is used in addition to that ordinarily employed in conjunction with the thermo-
metric column.
In applying my invention to a Six's thermometer I take a cane of glass of
sufficient length and bend it so as to make four equally long tubes, or thereabouts,
side by side connected together at the bends, one of them terminating in a spirit
bulb and the other in an expansion bulb.
The two tubes or portions of the bent tube used as thermometric tubes are
supplied with the requisite quantity of mercury, and the space above the mercury
and in the other tubes is filled with spirit. The two tubes used only as recording
tubes and the two thermometric tubes are each supplied with an indicator, and
that tube which terminates in the expansion bulb has a fine tube extending from
the end of its bore down to near the bottom of said expansion bulb to ensure such
indicating tube remaining filled with spirit. The tubes of each pair of tubes
are divided alike so that the scales are equally legible.
My invention is equally applicable to separate minimum thermometers.
Dated this 27th day of February 1895.
HARRIS & MILLS.
23 Southampton Buildings, London, W.C., Agents.
Improvements in Thermometers.
I, JAMES JOSEPH HICKS, of 8 Hatton Garden, in the County of London,
Meteorological Instrument Maker, do hereby declare the nature of this invention,
and in what manner the saine is to be performed, to be particularly described
and ascertained in and by the following statement :--
The invention relates to that class of thermometer in which a recording indicator
is used in addition to that ordinarily employed in conjunction with the thermo-
metric column.
In applying my invention to a thermometer of similar character to that known
as a Six's, I take a cane of glass and make four equally long tubes, or thereabouts,
side by side connected together at the bends and provided with a spirit bulb and
one or more expansion bulbs.
The two tubes used as thermometric tubes and their connecting portion are
supplied with the requisite quantity of mercury, and the space above the mercury
and in the other tubes is filled with spirit. The two tubes used only as recording
tubes and the two thermometric tubes are each supplied with an indicator and
the scales for the tubes of each pair of tubes are divided alike so that that of the

page_text: recording tube is equally legible with that of the thermometric tube and the
divisions indicating like degrees are on the same level.
My invention is illustrated in the accompanying drawings, in which :-
Fig. 1 is a face view of a complete thermometer of the character known as
Six's constructed according to my invention, and
Figs. 2 and 3 are face views of modifications showing the tubes without the
nounting and scale.
In Fig. 1 the inner pair of tubes a bare the thermometric tubes and the outer
tubes a¹the recording tubes; these tubes are all connected together by bends
as shown, thus forming one continuous tube, whilst the lower end of the tube a¹
terminates in a spirit or thermometric bulb c, and the lower end of the tube in
an expansion bulb d.
In order to ensure the retention of the spirit in the indicating tube b' and to
prevent the entry of air therein from the expansion bulb d, such tube has at its
lower end a fine tube extending from the end of its bore down to near the
bottom of the expansion bulb d. The recording tubes a¹ are each supplied
with an indicator e, as are also the thermometric tubes a b, and the scales for each
pair of tubes a a', or bare divided alike so that the scale of each recording tube
is equally legible with that of its adjacent thermometric tube and the divisions
indicating like degrees are on the same level.
In the modifications represented at Figs. 2 and 3 the thermometric tubes a b
are the outer tubes whilst the recording tubes a¹ are the inner tubes. In the
modification shown at Fig. 2 the upper ends of the tubes a a' are both connected
with a spirit bulb e and the upper ends of the tubes with a single expansion.
bulb d.
The modification represented at Fig. 3 is similar to that shown at Fig. 2 except
that the upper ends of the tubes are each connected to a separate and distinct.
expansion bulb d. The tubes a a¹ bb' in both these modifications are cach
supplied with an indicator e and the scales of each pair of tubes a a¹ or b b¹are.
divided alike, as in the thermometer shown at Fig. 1.
The adjustment of the indicators is effected in the usual manner.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The improvements in thermometers substantially as herein shown and
described.
2. In the construction of a thermometer of the character known as Six's, the
combination of four parallel tubes of equal or nearly equal length connected
together and forming a continuous tube, two of such tubes being used as thermo-
metric tubes and two as recording tubes, a spirit bulb and one or a pair of
expansion bulbs connected to such tubes, and a separate indicator in each of such
tubes, substantially as herein shown and described.
3. In the construction of a thermometer, the combination with a pair of
thermometric tubes, of a pair of recording tubes and an additional index in each
of such recording tubes, substantially as herein shown and described.
Dated this 26th day of November 1895.
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.