Improvements in. Thermometers.
Year: 1892

page_text: Date of Application, 11th Nov.,, 1892
Complete Specification Left, 8th Aug., 1893—Accepted, 9th Sept., 1893:
PROVISIONAL SPECIFICATION.
Improvements in. Thermometers.
I, JAMES JOSEPH HICKS, of 8 Hatton Garden, in the County of Middlesex,
Meteorological Instrument Manufacturer, do hereby declare the nature of this
invention: to be as follows:-
.
The invention has for its object improvements in thermometers whereby the
readings from time to time are enabled to be compared with each other, or the mean
or extremes of temperature of one day compared with those of another.
It has been proposed to combine with thermometers one or two sealed indicator
tubes filled with a suitable liquid and provided each with a moveable indicator and
with a scale corresponding with those of the thermometer tube.
Thermometers have also been provided with moveable indicators clipping the
tubes and capable of being slidden up and down thereon to record the temperature,
and they have also been provided with a moveable indicator consisting of a sliding
pointer mounted on a rod, or on or in a guide or guides of other character formed
on or fixed to the thermometer frame.
According to my invention I avoid all these additional' extraneous indicating
means, and combine additional indicators and additional scales with the thermometer
tube or tubes themselves.
For this purpose I so arrange the dimensions of the bulb or bulbs and of the
ordinary tube or tubes of the thermometer that the ordinary divisions shall
commence or extend to such position as will leave a sufficient length of tube or
tubes to contain an additional indicator or indicators and to be used with com-
pressed divisions or scales corresponding with those of the ordinary thermometer,
thus combining with each thermometer tube a double set of scales and indicators.
The ordinary indicator, that is to say, that which is acted upon by the mercury
or other fluid, is carried as usual by such fluid to the maximum or minimum
temperature, and the additional indicator of each tube is moved by means of a
magnet to the division on the compressed scale corresponding with that of the
thermometer tube, thus retaining a record for future comparison:
My invention is applicable to maximum and minimum thermometers combined' as
in the case of a Sixe's thermometer, or to a separate maximum or separate
minimum thermometer.
COMPLETE SPECIFICATION.
Improvements in Thermometers:
I, JAMES JOSEPH HICKS of 8 Hatton Garden, in the County of Middlesex
Meteorological Instrument Manufacturer, do hereby declare the nature of the
O said 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 thermometers by the provision
of improved; means for recording the readings and thereby enabling them to be

page_text: compared from time to time with each other or the mean or extremes of temperature
of one day to be compared with those of another.
It has been proposed to combine with a thermometer one or two sealed indicator
tubes filled with a suitable liquid and provided each with a movable indicator and
with a scale corresponding with those of the thermometer tube.
Thermometers have also been provided with movable indicators clipping the
tubes and capable of being slidden up and down thereon to record the temperature,
and they have also been provided with a movable indicator consisting of a sliding
pointer mounted on a rod or on or in a guide or guides of other character formed
on or fixed to the thermometer frame.
According to my invention I avoid all these additional extraneous indicating
means and combine additional indicators and additional scales with the thermometer
tube or tubes themselves.
In the accompanying drawing I have represented my invention applied, at
Figure 1, to a self-registering maximum and minimum thermometer of the character
known as a Six's thermometer, at Figure 2 I have represented my invention applied
to a simple self registering maximum thermometer and at Figure 3 1 have repre-
sented a method of preventing the upper indicator from passing into the bulb when
the thermometer is in transit.
In carrying my invention into effect I so arrange the dimensions of the bulb and
of the ordinary tube or tubes of the thermometer that the ordinary divisions or
scale shall commence at or extend to such a position as will leave a sufficient length
of tube or tubes to contain an additional indicator or indicators and to be used
with compressed divisions or scales corresponding with those of the ordinary
thermometer, thus combining with each thermometer tube a double set of scales
and indicators.
In Figure 1. a represents the bulb, which is filled with expansible fluid and
b, b, the minimum and maximum tubes respectively; the ordinary divisions of the
minimum scale c, commence at the point marked 62 and those of the maximum
scale c¹ terminate at the point marked 63, thus leaving a length of tubing 64 or 65
above each of such points, which is provided with a supplemental indicator d² or d³
to be used in connection with the compressed scales c2, c3; d d' are the indicators
ordinarily used with those parts of the thermometer tubes marked b, b'.
In Figure 2 a is the bulb of the thermometer b' is the ordinary thermometer tube,
c is the ordinary scale, and d¹ is the ordinary indicator. Above the ordinary
scale commencing at the point marked b³, the tube is continued so as to
provide a length of tubing 6 which is supplied with an internal supplemental
indicator d³ to be used in connection with the compressed scale c³.
The ordinary indicator d or d', that is to say, that which is acted upon by the
mercury or other fluid, is carried, as usual, by such fluid to the maximum or
minimum temperature, and the additional indicator d² or d³ of each tube is moved
by means of, a magnet to the division on the compressed scale c³ or c³ corresponding
with that of the thermometer tube, thus retaining a record for future comparison.
My invention is also applicable to separate minimum thermometers.
At Figure 3. e represents a glass spring which is inserted in the upper end of the
tube b' to prevent the indicator d³ from passing into the bulb when the thermometer
is in transit.
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. In thermometers, the combination with an extended portion of the ordinary
tube, of a supplemental recording indicator within such extended portion and a
supplemental compressed scale to be used in connection with such supplemental
indicator, substantially as herein shown and described and for the purpose stated.
2. A thermometer having in addition to the ordinary bulb, tube, scale and

page_text: indicator, an extended portion of tube, a recording indicator within such extension,
and a compressed scale to be used therewith, substantially as herein shown and
described and for the purpose stated.
11
01 1
1000
JAMES JOSEPH HICKS.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.