in the same load force plane and minimizes bowing of the support shaft under severe load conditions the integral motor worm reels and support shaft results in a compact light weight unit and cable tensioning means are provided for allowing easy and simple adjustment of the unit when it is installed application_number US 57586484 A description fig1 illustrates the garage door operator 18 of the invention mounted on the ceiling 17 of a grage for example a garage door 10 is movable on rails 11 and 12 from an opened to closed positions a shaft 13 is rotatably mounted on the wall 19 above the door 10 and has a counter balance spring 14 suitable cables and pulleys are associated with the end of the shaft 13 and the door so as to bias the door to the down position toward the floor 16 and upwardly toward the ceiling 17 in a conventional manner the garage door operator 18 is attached with a bracket 21 to the head wall 19 and has an arm 63 which is connected by bracket 64 to the door 10 the upper end of the arm 63 is connected to a trolley which rides on the rail of the garage door operator 18 a release rope 62 has a handle 68 so as to release the trolley from the actuating cable of the garage door operator so that the door can be manually opened or closed hangar member 81a and 82a are attached to the ceiling 17 by holding means such as screws 83 and 84 which support the cover member 76 which includes the motor and actuating mechanism of the garage door operator as illustrated in fig3 through 9 within the.