r advantages of a roller over those of a wheel are secured in moving a door, the bed of a printing press, or any other bur- den which has a reciprocating motion. In the ordi- nary form the roller is inapplicable to a sliding door; but, by a modification, as exhibited in this sheave (Fig. 1), where… … SLIDING-DOOR ROLLER SHEAVES. New York. The invention was patented May 5, 1863, The length of the slot is dependent upon the dis- from at will by simply increasing the dimensions of the box. The details of the pick are merely a solid box tance the door ia required to travel; also upon the and June…
Patents · Munn · Combination · Tools · Claim · Scientific American · Address · Patent law · American patent · Patent office · Cast Iron · Purposes set · Tapering oval · Purpose set · Address munn · Wrought iron
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