Interpolation devices

• US 3,151,239 A
• Filed: 05/18/1961
• Issued: 09/29/1964
• Est. Priority Date: 05/24/1960
• Status: Expired due to Term

• Current Assignee: Henri Lecroart, Pierre Ricateau
• Original Assignee: Henri Lecroart, Pierre Ricateau
• Inventors: HENRI LECROART, PIERRE RICATEAU
• Application Number:
  US04/111,097
• Time in Patent Office: 1,230 Days
• US Class Current: 708/847
• CPC Class Codes: G06G 7/30 for interpolation or extrapolation G06G7/122 takes precedence
• CPC Class Codes: G06G 7/36 of single equations of quadratic or higher degree G06G7/22, G06G7/24 take precedence
• CPC Class Codes: G06G 7/46 using discontinuous medium, e.g. resistance network
• CPC Class Codes: G06K 11/00 Methods or arrangements for graph-reading or for converting the pattern of mechanical parameters, e.g. force or presence, into electrical signal feelers for copying devices on machine tools B23Q35/00; arrangements for measuring areas G01B; measuring force G01L; adapted as input devices to computers G06F3/00; combined with pattern recognition G06F18/00; arrangements for image or video recognition or understanding G06V10/00; character recognition, recognising digital ink or document-oriented image-based pattern recognition G06V30/00; systems for transmitting the position of an object with respect to a predetermined reference system, e.g. tele-autographic system, G08C21/00
• CPC Class Codes: G08C 21/00 Systems for transmitting the position of an object with respect to a predetermined reference system, e.g. tele-autographic system

Claims

1. AN INTERPOLATION DEVICE FOR MEASURING THE VALUE OF A FUNCTION OF AT MOST TWO VARIABLES FOR VALUES OF AT LEAST ONE VARIABLE INTERMEDIATE BETWEEN A PLURALITY OF KNOWN VALUES OF SAID FUNCTION CORRESPONDING TO DISCRETE VALUES OF SAID VARIABLE, THIS DEVICE COMPRISING, IN COMBINATION, A PLURALITY OF FLAT CONDUCTOR ELEMENTS, ALL OF THE SAME SHAPE AND SIZE, LOCATED IN A COMMON SURFACE, AND ELECTRICALLY INSULATED FROM ONE ANOTHER, EACH OF SAID CONDUCTORS HAVING FOUR SIDES, THE RESPECTIVE TWO SIDES OPPOSITE TO EACH OTHER BEING PARALLEL, THESE CONDUCTOR ELEMENTS CLOSELY ADJOINING ONE ANOTHER, MEANS FOR TRANSMITTING TO EACH OF SAID ELEMENTS AN ALTERNATING ELECTRIC POTENTIAL PROPORTIONAL TO THE KNOWN VALUE OF SAID FUNCTION FOR ONE OF SAID DISCRETE VARIABLE VALUES RESPECTIVELY, A SHEET OF DIELECTRIC MATERIAL OF UNIFORM THICKNESS EXTENDING OVER THE SURFACE FORMED BY SAID PLURALITY OF ELEMENTS, A FLAT CONDUCTOR PROBE, OF A SHAPE AND SIZE IDENTICAL TO THOSE OF SAID CONDUCTOR ELEMENTS, LOCATED ON THE OTHER SIDE OF SAID DIELECTRIC SHEET FROM SAID SURFACE, SAID PROBE BEING MOVABLE IN ALL DIRECTIONS ON SAID DIELECTRIC SHEET, WITH THE SIDES OF SAID PROBE CONSTANTLY PARALLEL TO THE CORRESPONDING SIDES OF SAID CONDUCTOR ELEMENTS RESPECTIVELY, AND MEANS FOR MEASURING THE ELECTRIC POTENTIAL OF SAID PROBE.