Patents Assigned to Leonardo Beltrame
  • Acoustic unit base for electropneumatic horns
    Patent number: 4541505
    Abstract: An improved acoustic unit base for electropneumatic horns, of the type comprising a main body peripherally seamed to an end piece with a diaphragm therebetween. Said main body is formed by connecting together a first and a second member of deep-drawn sheet metal, the first comprising a central hole and the second forming a cylindrical seat for receiving a bush with a lipped opening which rests on the diaphragm.
    Type: Grant
    Filed: July 28, 1983
    Date of Patent: September 17, 1985
    Assignee: Leonardo Beltrame
    Inventors: Leonardo Beltrame, Attilio Granziera