Abstract: A novel delivery method and vestibule system for underground and similar conveyors, particularly longitudinally traveling conveyors carrying successive automobile-storage platforms, involving under an open vestibule floor area, conveyor loop structures that carry the platform upwardly into the open floor area for car delivery or removal, with automatic gating and walkway insertion to permit safe parking or retrieval of the car by the owner without attendant assistance, other than car platform selection and platform delivery command.
Abstract: Combined driven and idler dog chain assemblies engaging opposite sides of a main chain conveyor enable the driving of heavily loaded and long conveyor systems at one or more selected straight-line track sections, with minimal wear.
Abstract: An automatic method of and apparatus for taking up slack or relieving undue tension in a closed loop chain conveyor traveling in a corresponding track loop by dividing the track into separate sections, sensing the elongation or contraction in the chain in one section, and responding to such sensing to move the other track section away from or toward the said one track section to compensate for the chain length variation.