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Some patents


There are several patents that Juan registered under his name. Most are utility models relating to small items such as sleeves for records or cases for phonograph needles. In 1945 he requested a patent of introduction for the conservation of needles used in the United States of America.

However, there are several patents under his name relating to the manufacturing process of records. On September 6th 1950 he registered the utility patent No. 194497 to improve the manufacture of phonograph records. It is about the use of thin sheets of pressed fiber at a certain temperature, so the result is a purer playback of the recorded wavelengths. The quality of the material used in the surface layers, such as vinyl, phenol and other synthetic resins, lowered noise of the needle dragging. The recording of these records was made with sapphire at an angle of 82-84° and a radius of 0.05-0.06 mm. The number of grooves per inch could vary from 80 to 120 and could reach a length of 30 minutes per side for LPs, and 5 minutes for singles. Another advantage was that these 33 1/3 and 45 rpm records had a higher fidelity of reproduction than 78 rpm records when the needle slided into the center of the record. At 10,000 periods per second and 15 cm from the center, the 78 rpm record lost 15 decibels over the other two, in other words, a greater lost of high frequencies.

In 1952, under the number 204 332, he introduced a patent for the manufacture of phonograph records based on mixtures with polyvinyl resins. What was registered was the procedure, which brought changes into the cycles of warming and cooling of the moulds, in order to get a quieter playback of these records, with proper resonance and with a range of frequencies greater than it was achieved with the microgroove records so far.




Basque archives of music
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