{'fraction_non_alphanumeric': 0.030434782608695653, 'fraction_numerical': 0.014492753623188406, 'mean_word_length': 5.115044247787611, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Phased Roller Movement

This concept offers an entirely new approach to High Speed Photography as described in U. S. Patent No. 3,613,978. Phased eccentric rollers move the film intermittently, and continuously control captive loops unyieldingly; no spring loaded rollers with limited frequency response are used. Registration pins lock the film during exposure. Thus pull down claws, free loops, and associated instability problems at high speed operation are eliminated. Smaller roller eccentricity -- only 1/16 of pulldown dimension -- permits easy balancing, low eccentric bearing loads and mechanism strain. Unusual geometric relations permit easy adjustment for film pitch variations.