Guide bar for an elevator door

A guide bar for an elevator door comprising:

• a beam adapted to be attached to an elevator sliding door, said beam having a web and a sliding axis, a plurality of attachment apertures formed in said web in two spaced apart groups, each of said attachment apertures being formed from three generally circular overlapping recesses having center points defining all intersections of three sides of an isosceles triangle and one of said center points being located along a straight line extending perpendicular to a straight line between the other two center points a distance one half of the distance between the other two center points, and each of said center points being staggered with respect to all other ones of said center points associated in one of said groups in a direction transverse of the sliding axis of said beam by at least one of a predetermined step width equal to one quarter of the straight line distance between said two center points;
• a guide means for extending into a guide track;
• and
• fastener means for attaching said guide means to said beam in cooperation with a selected one of said attachment apertures in each of said groups.

In a guide bar for an elevator door including a beam adapted to be attached to an elevator sliding door, a guiding means for engaging a groove and fastener means for attaching the guiding means to the beam, the beam comprising:

• a first generally horizontally extending web having two groups of six attachment apertures each formed therein, said groups being spaced apart along a sliding axis of said beam, said attachment apertures each being formed from three overlapping recesses and a center point of each of said recesses being staggered with respect to said center points of all of the other ones of said recesses associated in one of said groups in a direction transverse to the sliding axis of said beam by at least one of a predetermined step width equal to one quarter of a longest one of al straight line distances between all pairs of said center points of one of said attachment apertures, said three center points of each of said recesses defining all intersections of three sides of an isosceles triangle and one of said center points being located along a straight line extending perpendicular to a straight line between the other two center points a distance one half of the distance between the other two center points;
• and
• a second generally vertically extending web having mounting apertures formed therein for attachment to an elevator door, said second web extending at right angles to and attached to said first web.