Deflagrator
A deflagrator ( Hare's spiral , calorimotor ) is an outdated galvanic device (an interconnection of galvanic cells ) for generating high voltages with strong currents, e.g. B. to vaporize a short-circuiting wire in a pulsed manner (cf. deflagration ).
The deflagrator was developed by Robert Hare (1781-1858) and perfected by Sibrandus Stratingh .
For example, a deflagrator is described as follows:
- Four layers of the same size made of cloth, copper sheet, cloth, zinc sheet are rolled tightly together in a spiral so that the two metals do not touch anywhere. When immersed in dilute sulfuric acid, a galvanic element is created, which can generate a high current due to the low internal resistance due to the large metal surfaces. Several (at Hare a total of 80 initially, divided into 2 x 40 in a sulfuric acid trough each) of such elements are connected in series.
Later, Hare even interconnected 250 such galvanic elements, which had been modified to a flat design, and produced, among other things. a. an electric arc between carbon electrodes and in mercury. He called the device a deflagrator - presumably because he could use it to explosively vaporize iron wires.
Literature, web links and sources
- Dionysius Lardner: Hand-book of natural philosophy and astronomy Second course. Taylor, Walton and Maberly, 1852, p. 293 ( online preview )
- A. Weinlig: Pharmazeutisches Centralblatt. No. 27, July 14, 1843 ( online preview )
- ↑ "Hare's Deflagrator, Connected to an Ordinary Trough Apparatus" in the Annual Report on the Advances in Physical Sciences, Volume 3, 1824, pp. 21-26