Abstract: A capacitive safety system for controlling a door, e.g. an elevator door, so as to automatically avoid obstacles, employs electronic control for antennas operating as capacitive measuring elements for establishing shield voltages of identical phase on the antennas and on shield voltage antennas to counteract ambient capacity variations. In order to improve the operation and safety of the elevator door, the elevator shaft door, which closes simultaneously with the elevator door, is provided with similar capacitive measuring antennas and electronic controls as the elevator door, as well as with similar shield voltage antennas, which operate on a shield voltage having the same phase as that of the elevator door. Operation of the elevator shaft door and the elevator door with identical phases is effected by means of a wireless shield voltage transfer unit.

Abstract: The side panels (60,70), back panel (50), base panel (38), and top panel (80) of an elevator car (26) are assembled via interlocking U-shaped channels disposed along the edges of the panels. The base panel (38) has downward-projecting tabs (48) that fit between two lower cross-members (20,22) of the car frame (10). When the top panel is clamped down on the assembly via brackets (24) on the upper portion of the car frame (10), the entire assembly is rigidized.