DE6610386U - ELECTRIC TEMPERATURE MEASURING DEVICE, IN PARTICULAR ELECTRIC Fever thermometer. - Google Patents

Description

Ρ.Α.213080 * 22Λ66

Siemens & Halske Munich 2, 22.AFR.1966 ^

Corporation. Witteisbacherplatz 2

.pa 66/2387

Electrical temperature enjoyment equipment, in particular _ . '. electric clinical thermometer ■■ '.'

I) Ie invention relates to an electrically operated TemperaturneSeinrichtung for temperature measurements of in an estimable, temperature values lying in a narrow interval, in particular for use as an electric clinical thermometer,; with temperature-dependent, electrically conductive solid body niu3 as a temperature sensor, to be used in particular in the case of successive ^ different from one another which have to be carried out as quickly as possible Measurements taken relatively close to one another

PA 9/501/294 Bts / hfr - 2 -

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PA 9/501/294 - 2 -

.Under a clinical thermometer for the purposes of the invention medical. Purpose of the device to be used for measuring body temperatures to understand living things.

• '5 · .. is known. The electrically operated clinical thermometer »at to which the semiconductor serving as a temperature sensor is attached in a thin-walled glass tube to one of the sealing caps.

α ν is ordered. For measuring temperature values accurate to a tenth of a degree, as shown on 3. for body temperature measurements in humans is necessary, a certain period of time must be adhered to, which is essentially made up of the to be heated . mating mass of the temperature sensor, from the heat transfer from the body to be measured to the temperature sensor and from the heat dissipation through the holder of the temperature sensor, required for the measurement »

An object of the invention is to shorten this period of time for a measuring process. Another object of the invention ... is to provide a more accurate measurement within a given *. · ^V; allow a short period of time. .

These tasks are performed by a, preferably a clinical thermometer Electrically operated temperature pouring device to be used solved, which according to the invention is characterized in that a device with a salt conductor for heating . of the temperature sensor to a predetermined, self-stabilized Temperature and a thermal insulation medium between the

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PA 9/501/294 '- 3 -. "'

direction and the temperature sensor are provided, the thermal insulation means in terms of selection and dimensions of the material to be used below is dimensioned so that the continuous flow of heat between the device during use and the feeler significantly lower than that between the body to be measured and the feeler during the measuring process, however large enough to heat up the sensor between. two successive measurement processes is »

In the context of the invention, the term temperature sensor is to be understood as meaning that part of the arrangement which supplies the criterion for the measured temperature. The heating according to the invention between two measurement processes to a predetermined temperature is referred to below as Ypr heating. Under "during use" and "continuously" in connection with the flow of heat between the device and the sensor, the following is within the meaning of the invention . to understand; "When used ¹¹ should mean - during the .time period in which both the individual measuring processes - carried out -

• ~ ^: " ^vr leads as well as the - intervening'-time-V" Continuously ""'" ^v - - is intended to indicate the state that is reached after severe heating'; after use and in which essentially ./ only nor the temperature fluctuations between the temperature values to be measured and the specified preheating temperature, which according to the invention is only a few degrees different from the temperature values to be measured, occur

of the measuring process "the period in which the individual temperature measurement takes place" is to be understood. ^v; '*'''"" ■ ' ^Λ ''JI"

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•! · ■ '■

ΡΛ 9/501/294 - Λ _ -

Through a special inventive development of the inven-. proper arrangement and / or also one of the simple ^N '■' ·. ' ren, already known electrically operated temperature mefi-

* · 'Arrangements, bci- "the .the. The plague medium of the temperature sensor ^.: -;.". '3 .., according to the invention a PTC thermistor "is" can also have a higher

Measuring accuracy, especially 'with otherwise essentially the same - ·. · Permanent nature of the specially "as. Clinical thermometer -. · -. · - ■ ·. '. temperature measuring device to be used "achieved". .. '·' · - · ■

\ i; "iCJ;·" .- '/ The preheating according to the invention is of particular importance [·'■> ■ '^' -; '"·'. ■■■ then,. When a PTC thermistor is used as the temperature sensor - ■. · -": which has a significantly greater temperature gradient than a made possible, but under um-: '- .. -15.'. would not be in dimensions with such a low "heat capacity: '■'.-"' -.-.- · .. "as the latter are executed leans.« · - - - _ · -

Invention is based on the consideration that a shortening - ..; .- ^{? I.} . , the time for the inequality of the temperature of the sensor at -ien PQ ~ \ \ body to be measured, according to a e-3 "extends unkticn, for -.vorgegebene. _ uses of TemperaturseSeinrichtung through." \ Y particular, namely the measure according to the invention, can be achieved. It is known that the time for the adjustment is given by s.3. the reduction of the mass of the xenperaturprobe and / or the production of a particularly good "Särise contact between the temperature probe and the body to be measured" in those cases, however, in which relatively close

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PA 9/501/294 - 5 - ^Vy

■ "adjacent, in their height" except for temperature differences can be estimated from a few degrees, but significantly different from the ambient temperature compared to this difference Temperatures are to be measured, can, in particular in addition to the known, above-mentioned measures, a further Shortening of the time for the adjustment achieved by preheating the temperature sensor according to the invention j

j become = As a typical example for the m embossed j Applications of the invention is the preferred use of the arrangement according to the invention as a clinical thermometer. I.

According to a rough estimate, for example, in the case of fever temperature measurements, the specified duration of the individual individual measuring process can be reduced to at least half the value with the preheating according to the invention if the temperature sensor is set to an average temperature of the measuring range between approximately 35 and 43 ° C or to a temperature that approximately coincides with the most frequently occurring, or according to the invention has been preheated to a "temperature in a narrower interval in which particularly precise measurements are desired, approximately between 37 and 38 ^{° C.,"}

Further details of the invention can be found in the figure and the description of a particularly preferred exemplary embodiment the invention «

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f)

PA 9/501/294 _ 6 -

1 is the bracket for the temperature sensor mentioned above, e.g. a thin-walled glass tube a few millimeters in diameter. At one end there is a so-called PTC thermistor 2 used as a temperature sensor. 2 is provided with electrodes 3 and 4 for the connection of insulated power supply lines 5 and β. older electrical resistance von'2 is temperature dependent. The special PTC thermistor "material v / ird, as is known per se, for the respective given Temperature measuring range of the thermometer selected »

7 is that which is to be provided according to the invention and is used for preheating PTC thermistor? it also has electrodes 8 and 9 for connecting isolated power supply lines 10 and Between 2 and 7 there is the one to be provided according to the invention

15-- de and Y / arm insulation to be measured according to the invention, z «3. sin mica platelets 12. As not shown in detail in this schematic exemplary embodiment, the power supply lines 5, 6 and 10 _{1 are} preferably guided along insulated notches attached to the side surfaces of 2 and 7.

3 when using a PTC thermistor as a temperature sensor advantageously a special additional protective cover of the same on the thermal contact surface, i.e. the surface between the temperature sensor 2 and the body to be measured, e.g. made of glass, is not required. The electrode 3 is expediently through a nickel layer about 10 to 100 / U thick formed on the edge is fused tightly to the glass tube. The whole

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PA 9/501/294 _ - - 7 -

The inventive arrangement is thereby with extraordinarily good thermal contact between the temperature sensor 2 and the body to be measured, preferably the human or animal skin, sufficiently resistant to external influences, .. Z ₀ Bo-against disinfectant solutions. "· ■■ .- ';

_- ■ V / ie not shown in detail in this schematic figure, ··: · ■ "the tube 2" goes into a suitable, known per se shark ·. "· < '.V' terupg, about; · -A material is selected as PTC thermistor 7, · '

"\" das-ia a tight one. Interval; around the specified temperature '··. ''. '

'..Γ - "' - 'around, as is known per se, a temperature-dependent cons-" · - "· ■' stand behavior, which in operation with current flow '... " ■ for setting-a self-stabilized temperature of the Body 7 leads »'., ..'

. ^ 5-. . '"' · '. ..- ..'.. ■. ·:. ·": "· ^:. '". ,;.;. . . '.' .. · ■ '. ^·: ..;': 'Due to the heating of the body 7 is the "- Temperature sensor" .. · \ .. 2, vorgesäien as in the present invention, a: default tem-

. '"· Temperature with such a weak one, essentially by 12 be-V agreed '.Värmefluß heated up that the temperature sensor zv / i-' '; ; '. ■ ■ see two successive measuring processes again the specified one Temperature at least largely approximates, but on the other hand during the individual measuring process temperature value to be measured is not falsified.

1 figure

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Claims (1)

P.A. 9/501/294 - · - "'. - S -. .RA.213080 * 22..4.66. / ^ Ρ — a t ο - Electrically operated temperature measuring device for temperature measurements of temperature values, especially electrical ones, lying in a narrow range that can be estimated Clinical thermometer, with temperature-dependent, electrically conductive solid-state medium as temperature sensor, characterized in that, that a device with a PTC thermistor • to heat the temperature sensor to a specified,.-Through the PTC thermistor itself stabilized 'temperature and . - a means of thermal insulation between the device and the temperature sensor are provided, the. Thermal insulation means with regard to the selection and dimensions of the The material to be used is dimensioned so that the continuous flow of heat between the device in lebrauch and the sensor is much smaller than that between the body to be measured by the temperature measuring device and the sensor during the measuring process, but sufficiently large to preheat the temperature sensor ο 2. Temperature measuring device according to claim 1, characterized in that that the solid-state medium of the temperature sensor is a PTC thermistor » 3 ο temperature measuring device according to claim 1 or 2, characterized in that the heat insulation means is a sheet, preferably made of mica. 661038622.11.73 ■ · "■ U PA 9/501/294 - 9 - / 4. Tesperaturnießeinrichtang according to claim. 1j 2 or 3? characterized in that temperature sensors, heat insulation means and apparatus for heating up in a holder (1). n electrically and thermally poorly conductive means, ^% preferably made of glass, are arranged. 5. Tenperaturmefieinriohtung according to one of the preceding claims, characterized in that the electrode on the heat contact surface of the temperature sensor serves as a protective cover, this · surface is formed. '...' ·· '. · 661038622.11.73