Abstract:
A height adjustment device for a transit shaft and arm assembly that enables height adjustments without significant disassembly of a transit door. An additional advantage is that the device does not require the use of shims, spacers or adjustment rings to adjust the height of the shaft and arm assemblies. Rotation of a nut threaded on the shaft allows for the adjustment of how much of the shaft hangs below a support member and a bearing. A surface of the nut bears on the bearing and the attached shaft and arm assembly hangs from the bearing and the support member the bearing is attached to. This arrangement allows the arm assembly to pivot along the longitudinal axis of the shaft. This arrangement also allows the height of the shaft and arm assembly to change with changes in position of the nut by threading the nut along the shaft.
Abstract:
According to this invention there is provided an adjustable base plate structure for a transit door comprised of a plurality of fixed dimension elements and a plurality of variable dimension elements for accommodating a plurality of door sizes and types. The base plate structure comprises a roller channel for spanning the width of the door and a center brace for being secured to the channel centered on the roller channel. Mounting brackets are secured to the vehicle or door frame and the roller channel.
Abstract:
A rotational position sensing device for sensing rotation of an axially adjustable shaft of a shaft and arm assembly of a door that does not require readjustment after the shaft and arm assembly are adjusted includes a fixed bracket supporting a post, a position sensor having an upper portion, a lower portion and an extended portion, and a rotating portion. The extended portion extends from the upper portion of the position sensor and constrains the post of the bracket such that the upper portion of the position sensor is unable to axially rotate relative to the bracket. The rotating section is adapted to be fixed to the shaft and engage with the lower portion of the position sensor, such that the rotating portion rotates relative to the upper portion of the position sensor.
Abstract:
A rotational position sensing device for sensing rotation of an axially adjustable shaft of a shaft and arm assembly of a door that does not require readjustment after the shaft and arm assembly are adjusted includes a fixed bracket supporting a post, a position sensor having an upper portion, a lower portion and an extended portion, and a rotating portion. The extended portion extends from the upper portion of the position sensor and constrains the post of the bracket such that the upper portion of the position sensor is unable to axially rotate relative to the bracket. The rotating section is adapted to be fixed to the shaft and engage with the lower portion of the position sensor, such that the rotating portion rotates relative to the upper portion of the position sensor.
Abstract:
A height adjustment device for a transit shaft and arm assembly that enables height adjustments without significant disassembly of a transit door. An additional advantage is that the device does not require the use of shims, spacers or adjustment rings to adjust the height of the shaft and arm assemblies. Rotation of a nut threaded on the shaft allows for the adjustment of how much of the shaft hangs below a support member and a bearing. A surface of the nut bears on the bearing and the attached shaft and arm assembly hangs from the bearing and the support member the bearing is attached to. This arrangement allows the arm assembly to pivot along the longitudinal axis of the shaft. This arrangement also allows the height of the shaft and arm assembly to change with changes in position of the nut by threading the nut along the shaft.