Abstract:
A power door for a transit vehicle includes a door panel, a base and hanger unit, a door support, a drive member and a motor. The door support is attached to the door panel and includes at least one roller which engages a hanger portion of the base and hanger unit for motion along the base and hanger unit. The hanger portion includes a longitudinal cavity and a slot communicating with the cavity. The drive member is disposed within the cavity and a drive member connector passes through the slot to connect the drive member to the door support.
Abstract:
An automatic door opener adaptable to manual doors which includes a door hinged along at least one edge to a door frame, and manually movable between open and closed positions; an automatic door opener mechanism secured to the door, which further includes a motor; a first gear driven by the motor; at least an output gear for driving an output shaft secured to the door; a pair of gear dog portions on a face of the output gear defining free travel spaces therebetween; a pair of pins extending from the output shaft within the travel spaces, so that when the output gear is rotated by the motor, the gear dog portions engage the pins on the output shaft and rotate the door from a first closed position to a second opened position; a timer for allowing the door to remain in the opened position a pre-determined amount of time before returning to the closed position; and when the door is moved manually to the opened position and allowed to close, the pin members are not engaged by the gear dogs, and travel within the free travel spaces without imparting movement to any components of the automatic door mechanism.
Abstract:
Rotary locks used on transit vehicle doors when opened and closed by a rotating helical door drive member. In a preferred embodiment, a first lock utilizes a negative thread portion of the helical drive. A second lock utilizes a rotating lock pawl and stop. The drive and lock can be used to operate door systems with and without separate door hangers. Compensation for camber variations in car structure is provided through the use of spherical mounts or drive member journals.
Abstract:
This invention relates to a quarter point return mechanism for a manually driven revolving door. Revolving door leaves extending outwardly from a shaft are partially enclosed between opposed curved sidewalls. The return mechanism has a number of elements including an actuator, a rack arranged to be linearedly displaced by the actuator, and a pinion engaging the rack and being rotatable in opposite directions. The pinion is rotatably connected to the central shaft of the door. When the pinion is rotated in one direction, rotation is transmitted to the shaft. When the pinion is rotated in the opposite direction, the rotation is not transmitted to the shaft. Also included is a circumferential displacement sensor which operates the actuator when the outer ends of the door leaves are in a position circumferentially displaced from the sidewalls. The return mechanism returns the door leaves to a rest position in which the door leaves are in contact with the curved sidewalls.