7

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" height=80 BGCOLOR="#000000" TEXT="#F7F7FF" bgproperties="fixed" background="6f8055f3.gif"> <div> <FONT SIZE="5" COLOR="#FFCC66" FACE="Arial" ><B>led, electric and strange watches - Pulsar - Bulova - Accutron - Hamilton - Riehl's Solar Synchronar - Omega - Heuer - Girard Perregaux - Zenith  red / green led - tuning fork -  nixie - Thermatron system</B></FONT><B>     |     </B><A HREF="index.htm" TARGET="_top" TITLE="led, electric and strange watches Pulsa"><U><B>home</B></U></A></div> <div> <A HREF="id22.htm" TARGET="_top" TITLE="1"><U>1</U></A>   |   <A HREF="id23.htm" TARGET="_top" TITLE="2"><U>2</U></A>   |   <A HREF="id24.htm" TARGET="_top" TITLE="3"><U>3</U></A>   |   <A HREF="id25.htm" TARGET="_top" TITLE="4"><U>4</U></A>   |   <A HREF="id69.htm" TARGET="_top" TITLE="4.1"><U>4.1</U></A>   |   <A HREF="id26.htm" TARGET="_top" TITLE="5"><U>5</U></A>   |   <A HREF="id27.htm" TARGET="_top" TITLE="6"><U>6</U></A>   |   <B>7</B>   |   <A HREF="id29.htm" TARGET="_top" TITLE="8"><U>8</U></A>   |   <A HREF="id30.htm" TARGET="_top" TITLE="9"><U>9</U></A>   |   <A HREF="id32.htm" TARGET="_top" TITLE="10"><U>10</U></A>   |   <A HREF="id72.htm" TARGET="_top" TITLE="1.0"><U>1.0</U></A>   |   <A HREF="id73.htm" TARGET="_top" TITLE="1.1"><U>1.1</U></A>   |   <A HREF="id74.htm" TARGET="_top" TITLE="1.2"><U>1.2</U></A>   |   <A HREF="id75.htm" TARGET="_top" TITLE="1.3"><U>1.3</U></A>   |   <A HREF="id85.htm" TARGET="_top" TITLE="14"><U>14</U></A>   |   <A HREF="id87.htm" TARGET="_top" TITLE="15"><U>15</U></A></div> <div> </div> </td> </tr><tr> <td valign="top" height=400 BGCOLOR="#000000" TEXT="#F7F7FF" bgproperties="fixed" background="4e1055f3.gif"> <div> 7</div> <div>  <img src="HTMLobj-234/aniGif.gif" border="0" align="bottom" width="133" height="100">  </div> <div>                         <FONT SIZE="3" COLOR="#FF0000" FACE="Garamond" > </FONT><FONT SIZE="7" COLOR="#FF0000" FACE="Garamond" ><A HREF="id42.htm" TARGET="_top" TITLE="7.1"><U>Storia del Bulova Accutron</U></A></FONT></div> <div> Orologi elettronici a diapason</div> <bR> <div> <B>Invenzione di Max Hetzel, ingegnere elettronico svizzero. Lavorò per la Bulova per poter realizzare il suo progetto poichè l'ambiente svizzero rigettava proposte di orologi non convenzionali.</B></div> <div> <B>Hetzel subordinò la precisione del suo orologio alla vibrazione costante di un diapason (simile a quello usato in musica per accordare sul "la" gli strumenti).</B></div> <div> <B>Tale scoperta portò alla produzione di un segnatempo bello, tecnologico ed estremamente preciso,con uno scarto medio, anche a 40 anni dalla sua produzione, di +/- 1 minuto al mese.</B></div> <div> <B>Elettronicamente semplice: batteria 1,35V, 2 bobine elettromagnetiche, 1 transistor, una resistenza ed un condensatore ceramico. La vibrazione del diapason è di 360 o 480 alternanze al minuto.</B></div> <bR> <DIV ALIGN="LEFT"></DIV> <div> <B><IMG SRC="19b82f10.gif" border=0 width="386" height="241" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"><IMG SRC="19a98f20.jpg" border=0 width="152" height="242" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>Bulova Accutron</B></div> <div> <B><IMG SRC="19f155b0.jpg" border=0 width="277" height="347" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"><IMG SRC="19e035e0.jpg" border=0 width="259" height="350" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>            <IMG SRC="1a1b6280.jpg" border=0 width="182" height="296" ALIGN="BOTTOM" HSPACE="0" VSPACE="0">                  <IMG SRC="1a3b3230.jpg" border=0 width="179" height="291" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>                        diapason elettromagnetico ingrandito</B></div> <bR> <div> <B>      <IMG SRC="25bdc540.jpg" border=0 width="220" height="340" ALIGN="BOTTOM" HSPACE="0" VSPACE="0">     <IMG SRC="25adc540.jpg" border=0 width="220" height="340" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>                         <IMG SRC="1be659f0.jpg" border=0 width="357" height="415" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>                  altri modelli di Accutron scheletrato con calibro a vista</B></div> <bR> <div> <B>                                   <IMG SRC="1bf0c370.jpg" border=0 width="268" height="311" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B><IMG SRC="1c22b390.jpg" border=0 width="555" height="313" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>Longines mod. Ultronic a diapason, movimento Esa</B></div> <bR> <div> <B>                       <IMG SRC="1c3595d0.jpg" border=0 width="345" height="349" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>                                       movimento Esa a diapason</B></div> <bR> <div> <B><IMG SRC="25cdc540.jpg" border=0 width="220" height="340" ALIGN="BOTTOM" HSPACE="0" VSPACE="0">     <IMG SRC="259dc540.jpg" border=0 width="220" height="340" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <bR> <div> <B><IMG SRC="34345890.jpg" border=0 width="325" height="393" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <bR> <bR> <div> <B><IMG SRC="3aa9dd80.jpg" border=0 width="413" height="472" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <bR> <div> <B><IMG SRC="3b29d830.jpg" border=0 width="413" height="643" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>Entrambi montano il calibro a 480 Hz Bulova</B></div> <bR> <div> <B><IMG SRC="53b74ee0.jpg" border=0 width="372" height="1006" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B>Longines Ultronic, gent.le concessione Sig. Arrighi</B></div> <bR> <bR> </td> </tr></table></body>