Abstract: A chain break safety device for vertically moving, bi-parting, counter-balanced elevator doors which comprises a block having a vertical lead disposed tapered opening, said block having limited vertical moveability with respect to the door, a braking member positioned within the tapered opening, a cage for maintaining the braking member in the tapered opening, and a resilient member adapted to deflect under the tension of the counter-balance system and move said block into a non-braking position and to cause the block to move into a braking position upon failure of the counter-balance system, thus pinching the braking member between the tapered surface and a static vertical member of the elevator door system.

Abstract: An astragal is formed by securing lengthwise flexible fire-resistant material to a mounting channel adapted to be mounted on an elevator fire door. The flexible fire-resistant material of the astragal is secured to the upwardly extending flanges of the mounting channel to form an elongated boot of uniform cross-section, wherein the astragal nose is substantially parallel to the mounting channel thereby insuring an effective fire seal.

Abstract: An improved astragal is formed by joining two layers of flexible fire-resistant material to form an envelope, which is then shaped whereby extensions of said envelope are overlapped to form a joint contiguous to a mounting bar, which mounting bar is used to affix the astragal to the elevator door.