Automatic weighing machine and feed control means therefor

摘要: 666,306. Automatic feed weighers. WRIGHT MACHINERY CO. Aug. 23, 1949, No. 21844/49. Class 143 [Also in Group XXX] An automatic weigher has separate vibrating main and dribble troughs arranged so that the latter is directly above former. Material fed to described Specification 638,665 by means of a conveyer 15, Figs. 1, 4 pair 90, 93, being driven motor 25 under control normally closed microswitch 66, which opened movement shoot 44 when it contains sufficient material pivot downwardly against action an adjustable spring (not shown), regular flow hopper 63. This feeds bulk trough through doors 99, tapering arcuate section extension 90 secured thereto constitutes trough, this shaped even, fine will be discharged from its end all surplus therefrom into 93. In operation initial preloaded weighing apparatus 115 opens micro-switch 118 circuit with vibrator 96 thereby stopped final weight made up continuously 90. Cut-off effected automatically pivoting 157, 157a on shafts 159, 161 then form temporary collects ready for dumping weigh pan they are re-opened at commencement next cycle. The mechanism operating said comprises electromagnet 147 energized, closing contacts 144, 145, further downward releases single revolution clutch 151 effect raising traversing emptying one replacement thereof other as 638,665, simultaneously cam 196, Fig. 7, rotated raise yoke 188 199 racks 190 rotate pinions 192 operatively causing first cut off then, after empty position, accummulated thereon. modification, 13, 14, 102a only used cut-off stopping 78 feed. 108 discontinuing vibration but relay 303 operated disconnect vibrator78 effecting and, furthermore energize 147a discharge pan, 316 rotatable shaft 152a 301 ensures not restart de-energization 303, consequent upon rising been removed, until complete. trunnions each T-shaped limb 105a can engaged between member 327 pivoted arm 328 329 block 333 328, right 324 rotation serving lock members blocks lift weigher, finally arms about pivots 331 dumping. both embodiments vibrators D.C. rectifiers 125, 133, 125a 133a speed rheostats 128, 136, 128a, 136a. 633,075 also referred to.