SU69752A2 - Device for transmitting thermometers and barometers - Google Patents

Description

The object of the present invention is a device for transmitting the readings of thermometers and barometers in which the moving part is a mercury column moving inside the tube. For this purpose, in the main author's certificate No. 26222, it was proposed to impose a system of electric covers on the measuring tube; capacitor and turn on this capacitor in the grid circuit of the lamp generator. When the height of the mercury column changes, the capacitor capacitance will change, as a result of which the generator setting changes, its frequency and generator frequency change is recorded in the receiver with an indicator, for example, an electric recorder.

According to the present invention, a gas thermometer or barometer with a mercury column so short that moving it along the tube causes periodic increases and decreases in the capacitance, for which the plates are provided with figured cutouts or holes, or alternating polarity.

Such a device can be used primarily in radiosondes.

FIG. 1 is a diagram explaining the meaning of the invention, and FIG. 2, 3, and 4 — various designs of capacitor plates superimposed on the tube of a thermometer or barometer.

The gas barometer used in the proposed device is a straight thin-walled tube 7 sealed at one end; A mercury column 2 is moving inside the tube, which is a movable hermetic piston that blocks a certain amount of gas in the closed tube bend. With a change in the magnitude of the atmospheric pressure, the mercury column moves in such a way that the gas pressure in the trapped volume remains equal to the atmospheric pressure when the tube is horizontal or different from the atmospheric pressure. 351

constant value due to the pressure of the mercury column.

The tube 1 is superimposed with a metal nlastin figurine 3 (Fig. 2) or a system of plates 3, 4 (Fig. 3 and 4), which, together with the mercury column 2, form an electric variable capacitor depending functionally on the measured parameter (pressure temperature) . This capacitor is included in the grid circuit of the generator lamp so that when its capacitance C changes, the generator frequency changes.

By changing the frequency of the radio transmitting device, one can judge the magnitude of the atmospheric pressure, and therefore the height of the radiosonde.

The essence of the present invention is to ensure that when the atmospheric pressure changes, the variable capacitance C of the variable capacitor does not change according to the monotonous law shown by the line L on the graph (Fig. 1), but by the more complex curves of lines B or B shown in same figure and having a number of minima and maxima of different amplitudes.

The specific character of each part of the capacitance curve makes it easy to distinguish it from the recording of the radiosonde signals and therefore determine the height of the latter at any given moment. Naturally, the possibility of an unambiguous reading of the magnitude of the atmospheric pressure is provided precisely by the use of a self-feeding device at the reception. With a visual readout, the unambiguity of the indicator readings in the proposed system is not always ensured.

Object of the invention Modification of the device according to the author's certificate No. 26222 for transmitting the readings of thermometers and barometers, where the movable part is a mercury column moving inside the tube, on which a system of plates of an electric capacitor incorporated into the grid circuit of a 1-phase oscillator using a self-detecting device is superimposed as an indicator, characterized in that a gas thermometer or a bar is used as a sensor for compressing and expanding individual sections of the receiver scale a pipe with a mercury column so short that moving it along the tube causes periodic increases and decreases in the capacitance of the capacitor, for which the plates are provided with figured cuts or holes or have alternating polarity.

FIG. four