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Vidal Grau manuel
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Vidal Grau manuel
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Application filed by Vidal Grau manuelfiledCriticalVidal Grau manuel
Priority to ES1973196778UpriorityCriticalpatent/ES196778Y/en
Publication of ES196778UpublicationCriticalpatent/ES196778U/en
Application grantedgrantedCritical
Publication of ES196778YpublicationCriticalpatent/ES196778Y/en
Lamp screen, characterized essentially by being constituted by a helical spring, preferably metallic and circular section, which at the upper end has turns of little diameter, increasing this progressively according to a parabolic shape as it extends below, until reaching a region from which the turns take the same diameter, leaving the upper turns of the lamp contacted to each other so as not to give way to light, and the lower ones separated in increasing distances as they approach the lower end, constituting the separations between turns for the light diffused by a conventional lamp placed internally on a socket, also conventional and internal to the screen, which is fixed to it by the region of turns of smaller diameter. (Machine-translation by Google Translate, not legally binding)
Improvements in light-producing apparatus reamaging instant photographs with artificial light (Machine-translation by Google Translate, not legally binding)