JP3054647U - Thermometer whose measurement temperature range can be easily identified - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enclose liquids of different hues in accordance with a measurement temperature range, so that a temperature measurer can immediately and reliably identify the measurement temperature range without having to look at the display of a thermometer. [MEANS FOR SOLVING PROBLEMS] Liquids of different hues are sealed according to the measurement temperature range, and the measurement temperature range can be easily identified with the naked eye. The liquid is an organic liquid such as alcohol or gasoline, and is colored by any of oil-soluble dyes and pigments such as monoazo, disazo and anthraquinone, or a combination thereof.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a glass thermometer, and more particularly to a thermometer configured so that a measurement temperature range can be visually identified.

[0002]

[Prior art]

 According to JIS standards, glass rod thermometers containing an organic liquid are classified into 50, 100, and 150 degrees thermometers according to the measurement temperature, and the thermometer body has 50A, 100A, and 150A, respectively. It is specified to display a thermometer symbol (JISB7411). However, it is difficult to identify the measurement temperature range using only these symbols, especially for thermometers for teaching materials used by lower-grade students. Frequently occurred, and such misuse caused an error in the accuracy of the thermometer, causing problems such as failure.

[0003]

[Problems to be solved by the invention]

 In order to solve the above-mentioned problems, the present invention encloses liquids of different hues according to the measurement temperature range, and it is certain that the temperature measurer can immediately do so without having to look at the thermometer display. Another object of the present invention is to provide a thermometer capable of identifying a measurement temperature range.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the present invention relates to a thermometer in which a liquid is sealed in a sealed glass tube or the like and the temperature is indicated by a degree of expansion corresponding to the temperature of the liquid. Liquids of different hues are enclosed according to the measurement temperature range of, and the thermometer is configured so that the measurement temperature range of these thermometers can be identified with the naked eye.

[0005] In order to solve the above-mentioned problems, the present invention proposes that the liquid sealed in the glass tube or the like is alcohol, gasoline, or another organic liquid. It is preferable to use a thermometer characterized in that any one of oil-soluble dyes and pigments such as anthraquinone or a combination thereof are added and colored.

[0006]

[Action]

 Since the thermometer according to the present invention is configured as described above, the measurement temperature range can be identified at a glance, and the trouble of reading the display and the misreading of the display can be prevented.

Further, since the thermometer according to the second aspect uses the oil-soluble dye or pigment as described above, the thermometer easily dissolves in a solution to have a uniform coloring concentration, and is difficult to be easily separated once dissolved. In addition, there is little danger of a precipitate or a coloring material remaining, and the coloring power is high and the addition amount is small, so that the influence of the coloring material on the physical properties of the temperature-sensitive liquid can be minimized.

[0008]

[Embodiment of the invention]

 Next, a typical embodiment of the present invention will be described with reference to the drawings. However, the present invention is not limited to this embodiment. The thermometer to which the present invention is applied is a thermometer in which a thermosensitive liquid composed of an organic liquid is sealed in a glass tube or the like, and the temperature is indicated by a degree of expansion corresponding to the temperature of the liquid. It is not limited.

According to the JIS regulations, this type of thermometer 1 includes a bulb 11 in which a temperature-sensitive liquid 2 is sealed, a capillary 12 extending continuously from the bulb 11, and a thermometer 1 connected to an upper portion of the capillary 12. An auxiliary spherical portion 13 is provided, a perforated portion 14 outside the capillary tube 12 for surrounding and protecting the capillary tube 12, and a head 15 at a tip end of the perforated portion 14. A scale line 16 indicating the temperature is provided. The inner wall of the capillary tube 12 is smooth and has a uniform cross-sectional area, the inner wall is free from significant dirt, moisture, dust, etc., and the amount of temperature-sensitive liquid in the upper auxiliary bulb portion 13 is large enough to affect the reading. Condition 2 is that there is no adhesion.

As a material, glass has little aging and has chemical or thermal durability, and the temperature-sensitive liquid is a liquid within the range of the scale of the thermometer, and is mixed with impurities, oxidized, and discolored. It is required that there is no change due to precipitation, etc., and that the gas sealed in the upper part of the temperature-sensitive liquid is dry and inert.

Next, the coloring material for coloring the temperature-sensitive liquid is required to satisfy the conditions required for the temperature-sensitive liquid. The oil-soluble coloring material described in the invention of claim 2 satisfies the conditions required for such a temperature-sensitive liquid and is preferable. Here, oil-soluble dyes such as monoazo, disazo and anthraquinone dyes will be described. Oil-soluble dyes that are soluble in fats and oils are dyes and pigments that do not have sulfonsan or carboxyl groups, and are insoluble in water and soluble in organic solvents.

Among the oil-soluble dyes, yellow, red, orange, brown and black dyes use mono and disazo dyes and blue dyes use anthraquinone dyes. Such oil-soluble dyes and pigments are usually obtained by introducing an alkyl group. Examples of oil-soluble dyes and pigments include, for example, Sudan manufactured by BASF, Ceres manufactured by Bayer, Cerasin manufactured by Casseila, and Molton Chemical. Automate (Automate) manufactured by Morton Chemical Co., Ltd., Fast (Fast) manufactured by Hoechst, Kayaset manufactured by Nippon Kayaku Co., Ltd., and Oil (Oil) manufactured by Shirato Chemical Co., Ltd. Next, specific examples of the oil-soluble dyes and pigments that can be used in the present invention will be described. In the present invention, it is preferable to use such oil-soluble dyes alone or in combination of several kinds. .

[0013]

[Table 1]

[0014]

【Example】

 Examples Hereinafter, representative examples will be described. A light gasoline fraction is used as the temperature-sensitive liquid, and the scale range is -30 to 50C (50A), -5 to 105C (100A), and -5 to 150C (150A). Was created. The temperature-sensitive liquid of each thermometer was appropriately selected from the oil-soluble dyes and pigments and used. The thermometer was prepared according to JIS standards.

In the present embodiment, a thermosensitive liquid of a thermometer of 150 A among the above oil-soluble dyes and pigments was colored red by a disazo-based Ceres Red 7B. Similarly, 100A was colored green by a colorant obtained by mixing monoazo-based automate yellow 8 and anthraquinone-based automate blue 8. Also, 50A was colored blue by anthraquinone-based Automate Blue 8. Dyes and pigments were added at about 0.1 to 4 weight percent of the temperature sensitive liquid. All of the above three types of thermometers were sharply colored and had sufficient discrimination.

EXPERIMENTAL EXAMPLES Regarding the three types of thermometers obtained in the above embodiment, the content of the invention was completely kept secret, and a total of 30 students of a specific elementary school and higher grade students were used on a trial basis. It was compared with a thermometer symbol only. In the experiment, thermometers with three types of measurement temperature ranges were mixed and selected, and a thermometer with an appropriate temperature range was selected from among them. Three types of refrigerant, dry ice melted alcohol, water, and heated silicon oil were used. The temperature of the liquid was measured by a suitable thermometer within a certain period of time.

Experimental Results As a result of the above experiment, in the case of the thermometer obtained in the examples, all students selected a thermometer in an appropriate temperature range without error. On the other hand, in the case of the conventional thermometer, it was confirmed that 2 to 5 of all students use the thermometer in the wrong temperature range. In particular, the thermometer of the present invention was selected without error even when the measurement time was short and the measurement was performed in a short time. There was a tendency to increase.

[0018]

[Effect of the invention]

 With the above configuration, the thermometer according to the present invention has the following effects. In other words, the temperature measurer can quickly and reliably identify the temperature range to be measured without having to look at the thermometer display, even for lower grade students and those unfamiliar with the use of thermometers. Even if it does, it is possible to prevent misidentification of the identification of the temperature range. As a result, the thermometer can be prevented from malfunctioning due to erroneous recognition of the measured temperature, and the time required for temperature measurement can be saved, and the temperature can be measured efficiently.

Furthermore, by using an oil-soluble dye or pigment as a coloring material of the temperature-sensitive liquid, it can be easily dissolved in a solution to have a uniform coloring concentration, and once dissolved, it is difficult to separate easily and a precipitate is formed. There is little danger of colorants remaining, and the coloring power is high and the addition amount is small, and the effect of the coloring material on the physical properties of the thermosensitive liquid can be minimized. Match.

[Brief description of the drawings]

FIG. 1 is a front view of a thermometer showing a typical embodiment of the present invention.

[Explanation of symbols]

1: thermometer, 2: thermosensitive liquid, 11: bulb, 12: capillary tube,
13: Auxiliary ball part, 14: Miki part, 15: Head, 16: Scale line

Claims (2)

[Utility model registration claims] 1. A thermometer in which a liquid is sealed in a sealed glass tube or the like, and a temperature is displayed according to a degree of expansion corresponding to the temperature of the liquid. Are enclosed so that the measurement temperature range of these thermometers can be visually identified. 2. The liquid sealed in the glass tube or the like is alcohol, gasoline, or another organic liquid, and the liquid may be any one of oil-soluble dyes such as monoazo, disazo, and anthraquinone, or these. 2. The thermometer according to claim 1, wherein said thermometer is added and colored in combination.