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Title: Spreader application rate monitoring device

Abstract: An application monitoring device to determine and display the volume of liquid or granular material applied per unit area of ground by mobile application equipment is described. The device includes a first measuring means which generates an area electrical pulse signal having a frequency proportional to the rate at which the application equipment covers or traverses a unit of area, and a second measuring means which generates a volume electrical pulse signal having a frequency proportional to the rate of application of the material. A frequency multiplying means operates on the electrical a pulse signal of the first measuring means, and a pulse counting device connected to the output of the frequency multiplying means and the second measuring means accumulates the electrical pulses from the second measuring means for a period of time determined by the frequency multiplying means and corresponding to the time required by said application equipment to cover a unit of area. Display means indicate the above accumulated value of pulses which is a measure of the volume of material applied per unit area.


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Inventors: Friedenberg, Leonald W. (Edmonton, CA, US)
Baker, James A. (Edmonton, CA, US)

Application Number: 899541
Filing Date: 1978-04-24
Publication_date: 1979-12-11
Assignee: Baker Engineering Enterprises Ltd. (Edmonton, CA)
Primary Class(es): 73/198 222/614
Other Classes:
US Patent Ref:
3249713Jul, 1961Briggs335/205.
3782634Jan, 1974Herman239/156.
4023020May, 1977Lesheadet239/155.
4052003Oct, 1977Steffen239/155.

Other Refs:
Primary Examiner: Yasich, Daniel M.
Assistant Examiner:
Attorney: Johnson; Ernest Peter