of a connector 89 fig5 shows the jack shaft sprocket 24 used with a guided chain in order to stiffen the chain between the sprocket 24 and the door bottom a chain guide consisting of portions 84 85 and 86 is provided a vertical portion 86 of which is disposed beneath the sprocket in a direction substantially parallel with portion 62 of the door track 60 the chain guide 85 and 86 prevent the chain from bending as it is pushed by the drive mechanism when closing or securing the garage door the center portion 82 of the chain 26 remains engaged with the sprocket 24 when the door is closed and when the door opens the chain 26 moves within the horizontal section of the guide 84 as shown in fig5 or is stored in a magazine 35 fig1 the horizontal portion of the chain guide 84 is adjacent and substantially parallel to the door track portion 68 in fig5 an additional chain guide 31 is used to keep chain 26 on sprocket 24 and a chain guide 31 is used to keep chain 26 on a sprocket 28 the automated garage door movement apparatus includes a reversible electrical motor 30 drivingly connected to a jack shaft 22 in operation when the motor is energized the jack shaft 22 rotates and the sprocket 24 mounted on the shaft and engaged with a drive chain 26 pulls the chain lifting the door when the door 16 is lowered the motor rotates in the opposite direction and the sprocket 24 pushes the chain 26 downward fig5 shows the garage door movement apparatus.