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Home > Auction >  Antique cameras&scientific instruments >  Lot.0028 Crosley Patent Telephone, c. 1880

LOT 0028 Crosley Patent Telephone, c. 1880

Starting price
EUR4,400
Estimate  EUR  7,000 ~ 9,000

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Crosley Patent Telephone, c. 1880 No. 1115, wall model, walnut case, microphone with wood diaphragm and 4 carbon pencils, side contact in the manner of a Morse key, turned Bell-type receiver, 7 brass connectors, original components and wiring, brass plate with name of connector "Alex Bernstein, Berlin" (entrepreneur and owner of several patents, one of the first owners of a private telephone in Berlin). - Note: Crosley improved on David Hughes' invention of the simple carbon pencil microphone by using four carbon pencils to improve the sensitivity of the transmitter and the range of the sound transmission. Instead of only a few 100 yards, transmission of up to 8 miles was now possible. Crosley's microphone was used with the telephones manufactured by Blakey and Emmott, which were purchased in large numbers by the British postal service and were also used in other countries. Crosley-Patent-Telephon, um 1880 Nr. 1115, Wandmodel, Nußbaumgehäuse, Mikrophon mit Holzmembrane und 4 Kohlestiften, seitlicher Kontakt in der Art eines Morsetasters, gedrechselter Bell-Typ-Hörer, 7 Messing-Anschlüsse, Original-Bauteile und -Verdrahtung, Messingschild mit Namen des Anschlußteilnehmers "Alex Bernstein, Berlin" (Unternehmer und Inhaber mehrere Patente, einer der ersten Besitzer eines Privattelephons in Berlin). - Crosley verbesserte die Erfindung des einfachen Kohlestiftmikrophons von David Hughes und verwendete vier Kohlestifte, um die Empfindlichkeit des Senders und die Reichweite der Tonübertragung zu verbessern. Statt nur wenige hundert Meter war nun eine Übertragung bis zu 12 Kilometer möglich. Crosleys Mikrophon wurde mit den von Blakey und Emmott hergestellten Telephonen verwendet, die von der britischen Post in großen Stückzahlen gekauft wurden und auch in weiteren Ländern verwendet wurden. Start Price: EUR 4.400

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Koeln, NRW, DE

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