Assertion: pascal | /r/CapableOf | go through 50 prototypes
Facets:
value: before settling on his final design
type: TEMPORAL
Source sentences:
text: Pascal went through 50 prototypes before settling on his final design; we know that he started with some sort of calculating clock mechanism that used springs which apparently "works by springs and which has a very simple design", was used "many times" and remained in "operating order".