secured to the front of the side said draw rods being forked and fitting in eyes. The opposite ends of the said rods are also for ked and in these forks the hollow teeth J J fit; to the front of each hollow tooth there is a le es up through the fork in the end of the draw rod and is attached by a pivot m a lever M which is secured to the draw ro by a pi vot 1. 0 is a frame hung loosely by pivots rests upon the levers M M., scientific american, 1852-06-26
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