초록 ▼

A device for controlling the movements or operating cycles of models, for example, model airplanes, model ships, kites, etc., which are driven by a drive motor is provided which includes a screw spindle which is affixed at about the center of a shaft which is coupled with the motor drive shaft. An i

A device for controlling the movements or operating cycles of models, for example, model airplanes, model ships, kites, etc., which are driven by a drive motor is provided which includes a screw spindle which is affixed at about the center of a shaft which is coupled with the motor drive shaft. An internally-threaded element, preferably a nut, is longitudinally guided on the screw spindle for actuating the operating cycle in one or the other direction. At the two protruding ends of the shaft, a spiral spring is disposed which urges a washer against the screw spindle in such a way that when the element becomes unscrewed from either end of the screw spindle, the element is retained in a free-running position, and during the reverse rotation of the motor drive shaft, the element is pushed in a counter direction whereupon it is screwed onto the screw spindle.

대표청구항 ▼

A device for controlling the operational movement cycles of models driven by a drive motor having a drive shaft with an internally-threaded axial bore, comprising: an externally-threaded screw spindle which is threadably receivable in said bore of said drive shaft; a pair of extension shafts secured

A device for controlling the operational movement cycles of models driven by a drive motor having a drive shaft with an internally-threaded axial bore, comprising: an externally-threaded screw spindle which is threadably receivable in said bore of said drive shaft; a pair of extension shafts secured to opposite ends of said spindle; a pair of tubes in which said shafts are longitudinally displaceable; a pair of stationary annular washers mounted within said tubes through each of which one of said extension shafts extends, each of said washers being spaced from an opposite end of said spindle; a pair of freely-movable washers mounted within said tubes through each of which one of said extension shafts extends, each of said freely-movable washers being disposed between an opposite end of said spindle and the stationary washer spaced therefrom; a pair of spiral springs, each of which is received on one of said extension shafts between one of said stationary washers and one of said freely-movable washers for biasing said freely-movable washers towards said spindle; and a control mechanism mounted on the ends of each of said extension shafts. *** BRS DOCUMENT BOUNDARY ***