GB862943A - Improvements in or relating to tensioning tools - Google Patents

Abstract

862,943. Tensioning binding straps. POWER STRAPPING SYSTEMS Ltd. Dec. 15, 1959 [Dec. 23, 1958], No. 41416/58. Class 45. A lever operated tensioning tool for flat strip bale ties is characterised in that the drive from the lever 41 to the tensioning capstan 34 is through a two speed gear. The tool also incorporates a spring gripper 18 and a guillotine blade 26 operated by a handle 30. The tool comprises a casing 12, 13, 14 containing a driving shaft 32 and a driven shaft 33 which carries the capstan 34, a wheel 37 and a gear 39. Solid with the driving shaft 32 is a pinion 36, which meshes with the wheel 37, and free on the shaft 32 is a gear 38 which meshes with the gear 39. Integral with the gear 38 is a sleeve 40 on which the lever 41 runs loosely. On one side of the lever is a rocket wheel 43, which is secured to the gear 38, and on the other side is a ratchet wheel 44 which is keyed to the shaft 32. The pawls 45 and 47 for the ratchet wheels are each mounted on a pivot on the side of the lever. At the top of the lever is a push button 51 which is connected through a rod 52 and a resilient coupling 59, 60, 61 to a transverse pin 49 which at one end engages a notch in the tail of pawl 45 and at the ther end engages pawl 47 at a point between the tooth and the pivot of that pawl. When the button is depressed, the pawl 45 is disengaged from the ratchet wheel 44 and the motion of the lever is transmitted through the ratchet wheel 43 to the gear 38 and hence to the capstan. The low speed ratio is engaged by releasing the button so that the pawl 47 is disengaged and the drive is through ratchet wheel 44, to the pinion 36 and the wheel 37.