Gauge panel structure for elevator shaft rough entrance opening

Abstract

A rectangular main frame has uprights resting upon and bolted to a shelf formed by a horizontal angle beam or corbel installed in the elevator shaft or hatchway below the floor level and at the intended location for the corridor entrance wall opening into the elevator shaft. Extending between the upper ends of the uprights is a top hanger header which subsequently supports the trackway for the corridor entrance door or doors. Also secured to the angle member is a corridor entrance sill support having secured thereto spaced parallel channel brackets projecting outward therefrom and containing pairs of keyhole slots in their vertical webs. A rigid rectangular gauge panel having external dimensions slightly greater than the external dimensions of the finished entrance opening structure is bolted to vertical legs adapted to rest temporarily on the rough corridor floor and also bolted to horizontal lower bent arms which in turn are secured to the channel brackets by bolts and studs adapted to fit into the keyhole slots. The gauge panel also has extensible upper forward angle arms which are bolted to slotted upper angle arms which in turn are bolted to the main frame. After the wall masonry has been completed up to the gauge panel, the gauge panel structure is removed, whereupon the finished entrance opening structure is slid into place with the heads of its bolts and studs inserted through the enlarged ends of the keyhole slots and their shanks then moved into the narrowed portions of the keyhole slots and permanently but removably secured by tightening the bolts.

Dependencies are inferred from the claim text.