DAVID L FLETCHER
Engineers in North Wales, PA
License number
Pennsylvania PE016455E
Category
Engineers
Type
Professional Engineer
Address
Address
North Wales, PA 19454
Professional information
Measuring System
US Patent:
4240149, Dec 16, 1980
Filed:
Feb 16, 1979
Appl. No.:
6/012632
Inventors:
David L. Fletcher - North Wales PA
Walter O. Stadlin - North Wales PA
Walter O. Stadlin - North Wales PA
Assignee:
Leeds & Northrup Company - North Wales PA
International Classification:
G06F 1520
US Classification:
364483
Abstract:
There is provided a method for measuring a parameter whose value is calculable as an integral with time of a function of at least one variable so as to make possible the use of a microprocessor when measurements of such variables are desired. The variable is sampled periodically at a frequency asynchronous with the wave form which the variable follows and then there is periodically calculated the value of the function by summing the values for the function determined by the samples taken during the time between the calculations, thus determining the desired integral.
Measuring System
US Patent:
RE31774, Dec 18, 1984
Filed:
Sep 15, 1983
Appl. No.:
6/532347
Inventors:
David L. Fletcher - North Wales PA
Walter O. Stadlin - North Wales PA
Walter O. Stadlin - North Wales PA
Assignee:
Leeds & Northrup Company - North Wales PA
International Classification:
G06F 1520
US Classification:
364483
Abstract:
There is provided a method for measuring a parameter whose value is calculable as an integral with time of a function of at least one variable so as to make possible the use of a microprocessor when measurements of such variables are desired. The variable is sampled periodically at a frequency asynchronous with the wave form which the variable follows and then there is periodically calculated the value of the function by summing the values for the function determined by the samples taken during the time between the calculations, thus determining the desired integral.