16-08-1967 дата публикации
Номер: GB0001079933A
Автор:
Принадлежит:
... 1,079,933. Recording-apparatus. BENSONFRANCE. Nov.3, 1964 [Nov. 8, 1963], No. 44809/64. Heading G1J. An X-Y recorder comprises two step-by-step reversible motors 15, 11, Figs. 4, 5 (not shown) responding to numerical inputs to drive respectively a sliding pen carriage 13 along rods 14 through a cord and pulley arrangement and a drum 4 with teeth 4a entraining a paper strip 3. The recorder also comprises two rollers 5 driven by constant speed motors 20, 21 in directions controlled respectively by pairs 8, 10 of photocells, which react to beams of light from a lamp 9, when cut off or exposed by loops 6 of the paper strip 3, so as to balance the lengths of the loops within such limits that interaction between the drum 4 and rollers 5 is avoided. To ensure the minimum inertia the diameter of the drum is made as small as is practicable, being made the more effective by using a fan 7, which, by suction, ensures contact between the drum 4 and paper 3 over more than half its circumference. To facilitate ...
Подробнее