Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
  • G01B3/02—Rulers with scales or marks for direct reading
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
  • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
  • B43L7/00—Straightedges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
  • B43L7/00—Straightedges
  • B43L7/10—Plural straightedges relatively movable
  • B43L7/12—Square and pivoted straightedges
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
  • G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes

Definitions

• the present invention relates to an instrument of the multifunction type making it possible in particular to measure angles, to draw straight lines and curves such as arcs of a circle, to calculate the value of a measured angle and of its trigonometric functions, and to directly view the result of the calculation using a screen.
• Such an instrument has faults common to conventional angle reporters, namely the low measurement accuracy and the impossibility of simultaneously providing trigonometric values of the angle measured.
• the object of the present invention is to provide a measuring and tracing instrument which overcomes the drawbacks of conventional instruments.
• Another object of the invention is to provide a simple and precise educational means for teaching on the measurement of angles and trigonometric calculations.
• the invention also relates to a measurement and tracing instrument making it possible to calculate and display directly on a screen all the data relating to the angle measurement.
• the angle measuring and tracing instrument comprises an articulated arm means for measuring an angle and / or drawing straight or curved lines; means for processing the measurement and in particular providing trigonometric functions of the angle measured; and means for displaying the result of the processing.
• the instrument comprises at least one articulated arm mounted on a base of which a straight edge serves as a reference for the articulated arm; a sensor for detecting the angle formed between said reference edge and a straight edge of the articulated arm; a keyboard comprising at least trigonometric function keys; electronic means for processing data recorded by said sensor and for executing commands transmitted by the keyboard; and a display screen allowing direct display of values from said electronic means, including those of said angle between the straight edge of the articulated arm and the reference edge of the base.
• the sensor preferably consists of a potentiometer.
• the electronic means may include a voltage / frequency converter and a microprogrammed processing unit provided with a fixed frequency clock.
• the instrument may have a cylindrical hole coaxial with the axis of articulation of said articulated arm, the apex of said angle being located on said axis of articulation, so as to be able to center said apex using for example a point. through said cylindrical hole.
• the base of the instrument has a second edge serving as a stop for said articulated arm.
• the keyboard can include keys for storing a minimum value and / or a value maximum allowable angle swept by the articulated arm.
• the straight edge of the articulated arm and / or the reference edge of the base has graduations, for example millimeter.
• the articulated arm is preferably provided with a rail on which is slidably mounted a pen holder cursor provided with locking means for immobilizing the cursor on the rail.
• the base may further include a ruler along a longitudinal side opposite the reference edge which may be formed by a strip mounted on the base.
• the sensor is preferably constituted by a cursor connected to the articulated arm in the vicinity of the articulation axis and a resistive track of annular shape concentric with the articulation axis and fixed on the base, so that the tension coming from the sensor varies linearly with the angle formed between the articulated arm and the straight reference edge.
• the display screen may allow graphics to be displayed in addition to numerical data.
• the screen is preferably of the liquid crystal type.
• FIG. 1 is a top view of the tracing measurement instrument of the invention with the articulated arm in positions A (0 °), C (180 °), and an intermediate position B ( ⁇ );
• FIG. 3 is a sectional view of the articulation of the articulated arm according to III-III of Figure 1; and FIG. 4 is a diagram of the operation of the electronic part of the instrument of the invention.
• the measuring and tracing instrument comprises a base 1 in the form of an elongated substantially parallelepipedic boxer.
• An articulated arm 2 is mounted on a substantially annular protuberance 3 of the housing 1.
• Said annular protuberance 3 is located in the middle of a longitudinal side 1a of the housing.
• the case 1 has, on the longitudinal side where the protuberance 3 is located, a graduated and straight edge, designated as the reference edge 4 and a stop edge 5, so that the straight edge 6 of the arm carrying graduations sweeps angles ⁇ varying between a minimum value (0 °) and a maximum value (180 °) relative to the reference edge 4.
• the apex of the angle ⁇ formed between the graduated edge 6 of the articulated arm 2 and the reference edge 4 of the base 1 is on the articulation axis of the articulated arm 2, the said articulation axis coincides with the axis of the cylindrical hole 7 formed by the annular protuberance 3.
• the graduations on the edge 6 of the articulated arm and on the reference edge 4 are preferably identical.
• the articulated arm 2 has a rail 8 on which slides a cursor 9 pen holder provided with locking means 10 making it possible to immobilize the cursor 9 on the rail 8. It is possible, for example using a pen mounted on the cursor 9 pen holder of the articulated arm 2, draw curves and more particularly arcs of a circle whose center is on the articulation axis of the arm 2. You can also draw angles using the edge of reference 4 of the base and of the graduated edge 6 of the arm 2.
• the reference edge 4 consists of a graduated side of a strip fixed on the housing which also includes a rule 11 mounted on its longitudinal side lb to l opposite the reference edge 4.
• the box 1 further comprises an electronic part for measuring the angle ⁇ and for calculating its trigonometric functions while allowing simultaneous display of the values on a display screen 12.
• the electronic part may include a calculator 13 and a power source 14, for example in the form of batteries.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
• Length-Measuring Instruments Using Mechanical Means (AREA)
• Length Measuring Devices With Unspecified Measuring Means (AREA)
• A Measuring Device Byusing Mechanical Method (AREA)
• Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9378024

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (6)

Family Cites Families (4)

• 1989
  • 1989-01-24 FR FR8900819A patent/FR2642163A1/fr not_active Withdrawn
• 1990
  • 1990-01-23 WO PCT/FR1990/000050 patent/WO1990008938A1/fr not_active Application Discontinuation
  • 1990-01-23 AU AU50270/90A patent/AU5027090A/en not_active Abandoned
  • 1990-01-23 CA CA 2025891 patent/CA2025891A1/fr not_active Abandoned
  • 1990-01-23 EP EP19900902290 patent/EP0419588A1/de not_active Withdrawn

Non-Patent Citations (1)

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