| 摘要 |
The disclosure relates to the provision of a camera with a mechanism which operates automatically prior to each film exposure to index a so-called flashcube or other multiple lamp flashbulb unit until the mechanism detects the arrival of an unfired bulb at a predetermined firing position. In contrast to previously known related devices which require the flashbulb unit to be installed before the film is advanced in preparation for the corresponding exposure, the invention allows the automatic indexing operation to be performed regardless of whether the flashbulb unit is installed before or after such film advancement has occurred. Means are also disclosed whereby such a mechanism is capable of performing repetitively between successive film advancing operations so that a replacement flashbulb unit can be indexed automatically after the mechanism has already indexed the previous flashbulb unit and has failed to detect the presence of any usable bulb therein.
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