Technikatörténeti szemle 9. (1977)

A MÉRÉS ÉS A MÉRTÉK AZ EMBERI MŰVELŐDÉSBEN című konferencián Budapesten 1976. április 27–30-án elhangzott előadások I. rész - Debreczeny Á.–Vajda P.: A Bláthy-féle fogyasztásmérő, az áramfogyasztás gyakorlati mérőmódszerei

A consistent execution of the above decree has proved to be viable so far. It can be applied in an unequivocal manner in nearly all cases. An evidence of the significance of the function performed by the watt-hour meter is provided by the large number of potential abuses even today wherever facilities of such metering are lacking. This is strikingly so e. g. in the uses of electromagnetic waves (radio waves). Although the above mentioned Act could, in principle, be applicable to those cases as well, a factual proof is made difficult just by the lack of an adequate measuring system. It is a familiar fact that the electro-magnetic field can be „tapped" easily in the vicinity of high-power radio transmitters. It will suffice to connect one pole of an electric load (e. g. an electric bulb) to a small antenna, and to ground the other pole, to utilize the electro-magnetic field. As early as the 1930's a widespread interest was aroused by the case of a vegetable garden owner in Hamburg, who illuminated in this way his house by the transmitter station (25). However, it can be pointed out, that the current expropriated in this illegal manner will have an adverse influence on the field strength of the antenna. Therefore, German jurists extended the scope of the above decree to currents obtained from radio waves as well. However, the fact and degree of consumption cannot be determined even today — just for lack of an adequate consumption meter. * # # In our opinion, it may be justly claimed that Hungary has also made a considerable contribution to the accurate and practically workable measurement of electric quantities: the AC electric watt-hour meters apply the Bláthy principle even today. LITERATURE 1. Korda D.: Fényelőállítás szapora-váltakozású áramokkal = Természettudományi Közlöny 1892. p. 401—413. 2. Vajda, P.: Wechselstrom oder Gleichstrom? —NTM-Schriftenr. Gesch., Naturwiss, Technik, Med., 1972. p. 49—55. 3. Zipernoiosky K.: Saját és másokkal közös, szabadalmazott találmányai az elektrotechnika és rokon iparágak köréből, Budapest 1900. p. 9—13., 14—21. 4. Electrical World Portraits No. XXXIII.Zipernowsky, Déri, Bláthy = The Electrical World (New-York) 1892. p. 258. 5. Austr. Hung. Pat. No. 35/2446.1885. Neuerungen an Induktionsapparaten, um elektrische Ströme zu transformieren Germ. Pat. No 40414/1885. Neuerungen an Induktsionsapparaten um elektrische Ströme zu transformieren Brit. Pat. No. 5201/1885. Improvements in Induction Apparatus for Transforming Electric Currents USA. Pat. No. 352105/1885. Improvements in Induction Apparatus for Transforming Electric Currents; Induction Coil 6. The Zipernowsky-Déri System of Distributing Electricity = Electrical Review 1885. p. 92—95., 114—117. Hospitalier, E.: Distribution de l'Energie Electrque par Transformateur Systeme Zipernowsky, Déri et Bláthy = l'Electricien 1885. p. 561—564. Central Station Lighting by Zipernowsky Transformers = The Electrical World (New-York) 1887. p. 27—28. 7. See No 2.