• Anno
  • 1920 ?
  • Categoria
  • Teaching aids-material
  • Radiomuseum.org ID
  • 340447

 Specifiche tecniche

  • Gamme d'onda
  • - senza
  • Tensioni di funzionamento
  • Batterie a secco
  • Altoparlante
  • - solo per cuffie o auricolari
  • Materiali
  • Vari materiali
  • Radiomuseum.org
  • Modello: Omnigraph No. 2 - Omnigraph Manufacturing
  • Forma
  • Diverse forme (descritte nelle note).
  • Dimensioni (LxAxP)
  • 450 x 155 x 255 mm / 17.7 x 6.1 x 10 inch
  • Annotazioni
  • The Omnigraph No. 2 was made by the Omnigraph Manufacturing Company of New York.  It was used to teach Morse Code to new telegraph and radio operators. 

    The original patent for this device were issued to Charles Chinnock on Aug 25, 1903 (US patent 736,936). The company appears to have been founded circa 1900, and to have ceased operation circa 1931. 

    The Omnigraph model shown here consists of a variable speed spring-powered motor and a stack of aluminum disks which have patterns of dots and dashes "encoded" in their serrated edges.  As the motor runs, the disks rotate, a "finger" on a leaf spring follows the pattern on the disks, and operates a set of contacts. 

  • Peso netto
  • 7 lb (7 lb 0 oz) / 3.178 kg
  • Prezzo nel primo anno
  • 30.00 USD
  • Bibliografia
  • Radio News (April-May 1922 advertisement)
  • Letteratura / Schemi (1)
  • Patent (US patent No. 736,936 Patented Aug. 25, 1903)
  • Letteratura / Schemi (2)
  • Patent (US patent No. 773,374 Patented Oct. 25, 1904)
  • Autore
  • Modello inviato da Gary Berg. Utilizzare "Proponi modifica" per inviare ulteriori dati.

 Collezioni | Musei | Letteratura

Collezioni

Il modello Omnigraph No. 2 fa parte delle collezioni dei seguenti membri.

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