tension in the braiding yarn and capable of taking up slack yarn application_number US 36611289 A description as is further elaborated in the description following the term 34 self propelled 34 as applied to bobbin carriers is intended to mean that energy such as electrical energy initiates mechanical movement in the carrier itself as opposed to the case in art devices wherein energy already in the form of mechanical energy is transferred to the bobbin carrier for example by a horn gear turning now to fig1 one sees a schematic isometric drawing of a single bobbin embodiment of the invention entering the braiding plane 1 are axial yarns 2 originating at a source outside the invention device axial yarns 2 pass over a roller 3 after which they are distributed to short pipe like guides 4 which guide the axial yarns for a sufficient distance above braiding plane 1 that bobbin carrier 5 comprising a braiding yarn bobbin and an electric drive motor can follow path 6 without interference braiding yarn 7 shown as a broken line as a result of the course taken by carrier 5 interlaces with axial yarns at braiding point 8 pins at stop point 30 controlled by the controller shown engage when raised a micro switch 31 on bobbin carrier 5 thus stopping the carrier these arrangements are not strictly necessary in the single bobbin carrier embodiment of this figure they are necessary in multi bobbin carrier embodiments because carriers do not always.