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US 4,478,301 AGranted
Apparatus for controlling the filling of weigh pans
AssigneeFrontier Electronics, Inc.
InventorsJohn M. Cochran, Jr., Ronald N. Cleveland
Life of this patent
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AssigneeFrontier Electronics, Inc.
InventorsJohn M. Cochran, Jr., Ronald N. Cleveland
Estimating the term…
An apparatus for selecting between a mechanical or electrical mode for controlling the flow of fibers by motor driven feed lift aprons from a plurality of hoppers to a plurality of weigh pans for producing a predetermined blend of fibers. The mechanical mode utilizes a balance arm assembly which can be set to feed a predetermined amount of fibers into a weigh pan. The electrical mode utilizes thumbwheel switches which can be set for regulating the amount of fibers to be fed into each weigh pan. The electrical mode system also utilizes a comparator for comparing a signal representing the actual weight of fibers in the weigh pan that is produced by a load cell with a signal representing the desired weight of fibers produced by the thumbwheel switches and generates a control signal responsive thereto. The control signal is used for operating a motor driven feed lift apron associated with the hopper.
An apparatus for selecting between mechanical and electrical modes of controlling the flow of fibers being fed by motor driven feed lift apron from a plurality of hoppers to a plurality of weigh pans for producing a predetermined blend of fibers, a balance arm assembly for mechanically setting a predetermined weight of fibers to be fed from a respective hopper to a respective weigh pan and a load cell for electrically monitoring the respective dumps of fibers from said weigh pans onto a conveyor, said apparatus comprising:
An apparatus for controlling the flow of fibers from a hopper by means of a motor driven feed lift apron and depositing a predetermined amount of fibers by weight into a weigh pan, a mechanically operated balance arm weighing mechanism provided on said weigh pan for weighing the fibers being deposited into said weigh pan, an electrical switch being activated upon a predetermined weight of fibers being deposited in said weigh pan as measured by said balance arm weighing mechanism and a load cell carried on said weigh pan generating a signal indicating the weight of fibers being deposited in said weigh pan, said apparatus comprising:
Dependencies are inferred from the claim text.