Abstract: A retractable motor-driven antenna 10 of compact size and light weight capable of being supported at the top of a support tube 14. A molded plastic housing 12, 30 in part forms the drive motor. A drive transmission 34 for extending and retracting the antenna mast 15 uses a timing belt 78 and pulley wheels 61, 62 and includes an overrunning clutch 84 or energy storage and release interconnection 76 between a drive pulley wheel 261 and a motor output shaft that drives a flexible cord 46 connected to the antenna mast. A switch assembly within the housing includes automatically stops the drive when the mast reaches its extended or retracted position or is obstructed. A coupling between the molded plastic housing and an antenna support tube isolates the housing from road vibration.

Abstract: A motor operated antenna for an automobile. The antenna includes a number of telescoping collapsible sections which form a removable unit. A reversible electric motor is mounted next to a fixed antenna tube in which the unit is positioned. The motor raises and lowers the sections in response to a switch actuated by a user. In the event any of the sections comprising the unit are bent or broken a collar holding the unit in place in the tube is loosened and removed. The unit can be withdrawn from the tube and replaced with a new unit.