| 摘要 |
<p>706,978. Creels for wire winding machines. LICENTIA PATENT-VERWALTUNGS-GES. Nov. 27, 1950 [Oct. 1, 1948; July 21, 1949], No. 29024/50. Class 120(2) For maintaining wire tension constant in a creel device for winding machines, the braking moment of a brake 14 acting through a brake lever 13 on the delivery spool 2 is reduced when the supply on spool 2 decreases or when the wire tension increases, and is increased when the wire tension decreases, spool 2 and the brake drum 6, together with the bearing 12 of lever 13, being together mounted on a first supporting lever 5, and a wire guide pulley 8 on a second supporting lever 9, and brake lever 13 being in tensional connection with lever 9, preferably through a tie rod 15, in such manner that a reduction in weight of the spool or an increase in the wire tension acting through pulley 8, is effective to reduce the braking moment on spool 2, and that a reduction in the wire tension is effective to increase the.braking moment on the spool. As shown, lever 5 is pivoted at 3 and suspended from a spring 4, while lever 9 is pivoted at 10 and is counterbalanced by a spring 11. As the supply of wire on reel 2 is reduced, the decreasing weight of the reel causes lever 5 to rise about pivot 3, the consequent movement of lever 13 reducing the pressure of shoe 14 on brake drum 6. Any movement of roller 8, due to increase or decrease in wire tension, acts through rod 15 and brake lever 13 to cause a compensatory decrease or increase of brake pressure. Springs 4 and 11 are adjustable, or the levers may be balanced by adjustable weights; the effect of spring 4 may be adjusted, for varying sizes and weights of reel, by displacing the position of its attachment to lever 5. In an alternative arrangement, brake shoe 14 is replaced by an adjustable brake band controlled by lever 13.</p> |
