SU697842A2 - Temperature indicator - Google Patents

Description

(54) TEMPERATURE INDICATOR

one

This invention relates to thermometry and can be used in topic indicators. perafy used for the automation of technological processes.

According to the main auth. No. 513273 is known for a temperature indicator containing a fusible substance and two electrical contacts, the fusible substance being placed in a transparent container of an airtight container, at the opposite end of which additional electrical contacts are fixed, and the rest of the storage tank is stored. on an inert gas or evacuated.

A disadvantage of the known 1mdnkator is the low speed, due to the fact that for the opening of the contacts the complete melting of the substance is necessary: between them, and in the known shchetkator the force causing the melt of the melted substance and determined by the drop weight is small compared to the force holding the drop surface tension.

The purpose of the invention is to increase the speed of the indicator.

To achieve this goal, the end pieces of a transparent sealed container, in the base of which are electrical contacts, are made of a pear shape.

The drawing shows a diagram of the proposed temperature shaker.

Claims (1)

Ivdschagor contains fusible substance I, which is placed in a transparent sealed container 2 with elec {5contacts 3 and 4. Conueu ie areas 5 and 6 of a transparent sealed container 2 are made in a pear shaped form, and the middle part 7 has a general shape. The container is made of refractory glass, such as quartz, and is filled with an inert gas or vacuum in a manner that depends on the used fusible material. Fusible substance I has a drop-shaped form, while closed electrical contacts 3 are located at the base of the end section 5. Dropping a form of fusible substance is achieved by preparative heating of the indicator to a critical temperature and keeping it at this temperature until it forms a required form with subsequent cooling. The indicator for measuring the temperature works as follows. The indicator is placed in a working environment, for example, in a heat-treating furnace, with interlocking electrical contacts located at the top. Due to the drop-shaped form of fusible substance 1, which was formed in advance, when the medium attains its average critical temperature, a thin bridge between the electrocoactants 3 melts first and because of the rest of the fusible substance located to the bottom of the closed electro contacts 3 and which may not be completely melted, the fusible substance 1 is disconnected from the electrical contacts 3 and, as a consequence, a. For further use of the indicator, its naipe is higher than its critical temperature to completely fill the lower, thinned part of the vessel, cool to harden the meltable substance, and, in the inverted 180 position, heat up again to give the meltable substance a drop-like shape. After solidification of the meltable substance, the temperature indicator is again suitable for placement in the working medium. The proposed temperature indicator has a significantly higher speed compared with the known. The invention The temperature indicator for the auth.St. No. 513273, characterized in that, in order to increase the speed of the indicator, the end portions of the transparent sealed container, at the bases of which electrical contacts are located, are made of a poor shape. Sources of information taken into account in the examination 1. USSR author's certificate N 513273, cl. G 01 K 11/06, 1975 (prototype).