GB753945A - Improvements in or relating to weighing mechanisms - Google Patents

Abstract

753,945. Weighing apparatus. BLAW KNOX, Ltd. July 9, 1954 [July 14, 1953], No. 19580/53. Class 143 [Also in Group XXX] A skip is movable between a lower loading position and an upper emptying position, and in its lower position is received in a cradle supported for movement relatively to a rigid frame, and bears on an hydraulic capsule for weighing. As shown in Figs. 1, 2 the weighing arm 14 is pivoted at 15 to the mixer frame and carries a cradle formed by arms 20, 21 pivoted to arm 14; arm 14 has an extension 17 on which is a hydraulic capsule 18 so that when the skip 11 rests in the cradle it bears on the capsule and the weight is shown on dial 28; the skip is lifted by ropes at its front end, and pivots about the rear cross-tube 22 until shaft 12 engages in V-brackets 13, when the skip disengages from tube 22 and pivots about axis 12, to empty into the mixing drum. For transporting, the skip is secured to the cradle by link 29 and pulled up, together with the weighing arm 14 to fold against the mixer. Rubber bushes are used for all pivots. In Fig. 3, the skip 45 is pulled up inclined rails 31. The skin 45 is shown in the cradle 39, 36 bearing on the hydraulic capsule 34; ropes attached to the front end of the skip are drawn up by winding drums; the skip initially pivots about the axis of a cross tube 37 until the V-notches 50 engage the shaft 51 of a trolley 48 movable on the rails 31; the skip then slides a short distance upwards until a pin 54 on the skip is engaged by a hook 55 on the trolley, and afterward skip and trolley are pulled to the top of rails 31 where the hook 55 engages an abutment 57 releasing the skip and allowing it to be tilted about axis 5'1 and empty. The skip is then lowered on to the trolley and the trolley descends, the hook 55 re-engaging pin 54 on the skip. At the lower end of the rails, the trolley engages a stop but the skip continues to slide down to be received into the cradle.