Computermuseum der Fakultńt Informatik deutsch franšais

Canon Canola 130S

__Bildbeschreibung englisch Bild: Canola 130s total view

<<< >>> ^^^

Manufacturer: Canon Camera Co., Inc Type: Canola 130S Year: 1968 Serial no.: 861367 Technology: discrete, Ge-transistors Display: Bulbs/lightconductor

Most conspicuous of the Canola is its display: Because transistors at that time had problems to switch the high voltages used with nixie-tubes Canon tried another approach. Every digit of the display consists of 12 glass plates. In each one of these plates is either a digit or symbol engraved made of single dots. On the edge of the plate there is a tiny light bulb. If the bulb is on then one can see the appropriate digit formed by the flare of the dots. single digits single digits The result is worse than that of the nixie-tubes. Because the single digits are also located one behind the other, some of them, for example 2, 4 and 8 are bothered by inactive others. Additionally the digits have a "comet tail" from the reflections on the surfaces of the other plates. This tail points to the left or to roght depending from the direction of viewing. This can be seen on the two zeros in the first row. Another particular feature of the canola is the green separator bar, here shown aside from the 9. It is explained in the section "operating" operating architecture

back to the home page