Vacuum flask is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings.
| FactSnippet No. 1,414,026 |
13 Facts About Vacuum flask
2.
Vacuum flask was designed and invented by Scottish scientist Sir James Dewar in 1892 as a result of his research in the field of cryogenics and is sometimes called a Dewar flask in his honour.
| FactSnippet No. 1,414,027 |
3.
Vacuum flask evacuated the air between the two chambers, creating a partial vacuum to keep the temperature of the contents stable.
| FactSnippet No. 1,414,028 |
4.
Dewar refused to patent his invention, and the Vacuum flask, as developed by others using new materials such as glass and aluminium, became a significant tool for chemical experiments and a common household item.
| FactSnippet No. 1,414,029 |
5.
The Dewar Vacuum flask design had never been patented but the German men who discovered the commercial use for the product named it Thermos, and subsequently claimed both the rights to the commercial product and the trademark to the name.
| FactSnippet No. 1,414,030 |
6.
The vacuum flask went on to be used for many different types of scientific experiments and the commercial "Thermos" was transformed into a common item.
| FactSnippet No. 1,414,031 |
7.
The inner flask contains liquid helium and the outer flask contains liquid nitrogen, with one vacuum section in between.
| FactSnippet No. 1,414,032 |
8.
The Vacuum flask helped with controlling the Zener temperature over a long time span and was used to reduce variations of the output voltage of the Zener standard owing to temperature fluctuation to within a few parts per million.
| FactSnippet No. 1,414,033 |
10.
Design and shape of the Dewar Vacuum flask was used as a model for optical experiments based on the idea that the shape of the two compartments with the space in between is similar to the way the light hits the eye.
| FactSnippet No. 1,414,035 |
11.
The vacuum flask has been part of experiments using it as the capacitor of different chemicals in order to keep them at a consistent temperature.
| FactSnippet No. 1,414,036 |
12.
Industrial Dewar Vacuum flask is the base for a device used to passively insulate medical shipments.
| FactSnippet No. 1,414,037 |
13.
Proper preparation of the Dewar vacuum flask by tempering prior to use is advised to maintain and optimize the functioning of the unit.
| FactSnippet No. 1,414,038 |