Abstract: A conveyor system includes a power and free section transporting product carriers on power and free type trolleys and a monorail section transporting utility carriers about a fixed loop. The monorail system is connected to the power and free section to receive and transport the trolleys with the product carriers interspaced between the utility carriers.

Abstract: A conveyor system includes a power and free section transporting product carriers on power and free type trolleys and a monorail section transporting utility carriers about a fixed loop. The monorail system is connected to the power and free section to receive and transport the trolleys with the product carriers interspaced between the utility carriers.

Abstract: A positive retraction trolley stop mechanism is provided for a power and free conveyor system having a trolley member driven along a track. A depending trolley dog, engaged by drive dogs on a drive mechanism to push the trolley along the track, is movable between upper and lower positions for disengagement and engagement with drive dogs. The stop mechanism includes a pivotal stop arm which is pivoted to an upper position to engage a trolley dog on a trolley to be stopped and supported there by a cam member which is pivoted by a piston and cylinder. The cam member is pivoted out from under the stop arm to release the stop arm to assume its lower non-braking position. A one way or lost motion link is connected between cranks on a cam shaft and a stop arm axle to positively pull the stop arm to its non-braking position. The lost motion link is connected to the cam crank by a link connector which slidably engages a slot in the ink.

Abstract: An article transfer arrangement includes a loading station and a discharge station spaced therefrom and level therewith, upper and lower pairs of parallel track rails extending between the stations, a rigid article carrier having an upper article engaging surface and front and rear wheels, the front wheels being closer to the article engaging carrier surface than the rear wheels, and an endless drive chain connected to the carrier and to a drive motor and operable to reciprocate the carrier between the stations. During motion between the loading station and the discharge station, the front wheels are lifted into engagement with the upper track rails by action of the drive chain about a chain sprocket whereby the carrier surface is oriented horizontally and is raised above the platform level of the station to thereby lift an article from the loading station.