KUNDO 24H Electro-Mechanical Synchron » D I G I T A L A L A R M « CLOCK ******************************************************************************** » Kundo 2000 SLR « Kieninger & Obergfell, St.Georgen / Germany (1970) W = 6_1/4" / 16 cm ; D = 3" / 7.5 cm ; H = 3" / 7.5 cm 220 VAC / 50 Hz / 2 W ( ALARM BUZZ ON = 16 W ) Setting with SWITCHES for HOUR & MINUTES and WHEELS for ALARM from the bottom R E M A R K S : A clever solution! ================================================================================ I found this clock in Berlin FleaMarket and wondered: How it could have so BIG FIGURES in such SMALL SPACE ??? - At home I found the solution: The DISPLAY consist of 8 triangular PRISMs (s.Picture 8x3=24 ). On "top" of the figure 15 is the 23 and on its "bottom" the figure 7. The working flow ... -> 0 +-> 8 +-> 16 1 | 9 | 17 2 | 10 | 18 3 | 11 | 19 4 | 12 | 20 5 | 13 | 21 6 | 14 | 22 ----- | ====== | ------ 7 ->-+ 15 ->-+ 23 -> ----- ====== ------ The BUZZER ( the white round in middle of the print board ) is connected over a BI-METAL-RELAY ( the white block right ): When the buzz-current made it HOT, it disconnect the buzzer for a while. After cooling it connect the buzzer again ... until the NEXT MINUTE switches ALARM OFF. A switch on top of the case disables the alarm by opening the contact ( located left of the big resistor ). The HOUR-WHEEL and the MINUTE WHEEL of the A L A R M S E T T I N G have contacts. The HOURS & MINUTES of the D I S P L A Y are connected with the ALARM-SETTINGS over "SYNCHRONIZED GEARING" to close the contacts when it's time. Have a look at ANOTHER DISPLAY PRINCIPLE impressum: ******************************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 05/23/16 |