Alexander Miles: Modern Day Elevator


The objects of the invention are, first, to provide mechanism operating automatically to close the shaft openings above and below the elevator-cage, and so preclude the possibility of danger by reason of such openings being left unclosed through negligence; and, second, devices operating automatically by the movement of the cage to open and close the cage-doors when set by an operator to be in engagement at any desired floor. The first of these objects is accomplished by means of a flexible belt having its ends attached to the cage and running over drums at the top and bottom of the shaft, and the second by means of levers pivoted to thecage, having one of their ends connected to a door and the other ends carrying rollers which are engaged in curved grooves provided in the corners of the shaft at the several floors, and devices provided in the cage for enabling an operator to throw the rollers into or out of engagement at will. These objects are attained by the mechanisms illustrated in the accompanying drawings, in which– Figure 1 is a side elevation of an elevator shaft and cage containing my improvements. Fig. 2 is a front elevation of the same. Fig. 3 is a detached view of one of the cage-doors and its operating devices. Fig. 4 is a detail of the devices for sliding the roller-wheels carried by the levers to and from positions to be engaged in the grooves. Fig. 5 is a cross-section of one of the uprights of the shaft, showing the beltway and a portion of one of the belt cross-strips in it. Fig. 6 is a perspec tive view of an elevator shaft and cage provided with the improvements, but having a single cage-door; and Fig. 7 is a top view of the sliding doors and their tracks.


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