Planter monitor system
Patent 4710757 Issued on December 1, 1987. Estimated Expiration Date: 
December 1, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 1, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3450988 3469157 3515884 3551919 3641543 3754172 3824460 Acoustic grain flow rate monitor Piezo-electric seed-flow monitor High speed capacitance apparatus for classifying pharmaceutical capsules InventorApplicationNo. 06/580108 filed on 02/14/1984US Classes:340/684, Agricultural111/903, MONITOR324/663Where a material or object forms part of the dielectric being measuredExaminersPrimary: Rowland, James L.Assistant: Hofsass, Jeffery Attorney, Agent or FirmInternational ClassG01N 27/22 (20060101)AbstractThis invention monitors the presence of or a flow of discrete small particles having a high dielectric constant, particularly seeds being planted by a seed planting machine. The invention uses the high dielectric constant of the particles, such as seeds, passing at least a pair of spaced electrodes to vary the capacitance between them and thereby indicate presence of the seed. The capacitance variation is detected and then processed by console located display, alarm and/or counting circuitry. | |
