EP0500228A1 - Compas de dessin - Google Patents

Compas de dessin Download PDF

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Publication number
EP0500228A1
EP0500228A1 EP92300905A EP92300905A EP0500228A1 EP 0500228 A1 EP0500228 A1 EP 0500228A1 EP 92300905 A EP92300905 A EP 92300905A EP 92300905 A EP92300905 A EP 92300905A EP 0500228 A1 EP0500228 A1 EP 0500228A1
Authority
EP
European Patent Office
Prior art keywords
leg member
writing
writing apparatus
holder
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92300905A
Other languages
German (de)
English (en)
Inventor
Selvarajah A/L Nadarajah
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0500228A1 publication Critical patent/EP0500228A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/02—Compasses

Definitions

  • the present invention relates to a writing apparatus and in particular to a writing apparatus to draw circles or circular arcs.
  • Prior art writing apparatus to draw circles or circular arcs consists of a V-shaped hinged instrument with first pointed leg hinged to a second leg hich includes a laterally disposed attachment along the second leg to receive and hold an elongate writing instrument such as a pencil or a pen commonly a grip holder is secured at the hinge, to facilitate the holding of the apparatus to draw the circles or the circular arcs.
  • the distance between the terminal end of the pointed leg and the sharp point of the rib or lead of the writing apparatus forms the radius of the circle or circular arc to be drawn.
  • One of the disadvantages of the prior art is that to facilitate the convenient operation of the writing apparatus the pen or pencil has to be substantially shorter than the leng ht of the second leg. Otherwise the free end of the pen or pencil interferes with the thumb and index finger movement when the first leg is rotated about its longitudinal axis in the drawing of a circle or circular arc.
  • the laterally disposed attachment includes a cylindrical block with grooves (threads) along the circumferential surface.
  • An aperture is provided along the cylindrical block to receive a pen or pencil.
  • a tightenable circular ring is provided, to securely fasten the pen or pencil in the sand aperture by rotating the circular ring towards the longitudinal axis of the second leg until the circular ring firmly presses against the pen or pencil already in the aperture such an arrangement to secure a pen or pencil in the aperture is extremely inconvenient in that as the grooves wear out, it is difficult to rotate the circular ring along the grooves.
  • a writing apparatus to draw circles and/or circular arcs of pre-determined radius constisting of a sharp pivotal point at the terminal end of an elongate leg member and a holder to receive a writing instrument such as a pen or pencil and a finger member to rotate the apparatus about its vertical axis.
  • the holder is rotatable about an axis perpendicular to the longitudinal axis of the elongate leg member and is secured to the elongate leg member.
  • the holder to receive a writing instrument includes a clip means rotatably fastened to a lateral finger.
  • the lateral finger can be secured to the elongate leg member in the perpendicular or at any desired angle to the longitudinal axis.
  • To control the rotational movemnet of the clip means it is frictionally controlled at the axis of the mount to the lateral finger.
  • the angle of rotation of the clip means about the axis of the mount is preferably 360° is both clockwise and counterclockwise directions.
  • a writing apparatus (10) has a longitudinal leg member (12), with a sharp pointed end (14) and a grip means (16) at the other end.
  • a means (18) to hold a writing Instrument (20) is provided and which means is rotatable about an axis substantially perpendicular to the longitudinally axis of leg member (12).
  • the leg member (12) is elongate and includes a terminal sharp end (14).
  • the sharp end can be an integral part of the leg member (12) or alternatively a sharp pointed metal end (14) can be secured into the leg member (12) which leg member can be hollow or solid.
  • a metal rod is secured into a partially hollow leg member. A metal end retains its pointedness over a longer duration of usage as compared to a plastics pointed end.
  • the other end of the leg member includes a grip means (16).
  • the grip means preferably includes a friction surface to provide a non-slip grip, the friction surface is preferably a grooved surface.
  • the writing apparatus (10) includes a lateral flange number (22) which is designed and configured to receive a clip (24).
  • One arm (26) of the clip is rotatably mounted onto the lateral finger member (22); the axis of rotation of the clip (24) being perpendicular to the longitudinal axis of the leg member.
  • Suitable frictional elements, such as friction washers are included in the joint means connecting the lateral flange member and the arm of the clip.
  • the internal gripping surface of the clip can be configured to secure the writing instrument such as a pencil or a pen in a non-slip manner or alternatively can be configured to grip specific writing instruments.
  • the biasing means in the clip is selected such that the writing instrument can be inserted into the clip by applying thumb pressure on the arms of the clip.
  • a writing instrument (20) such as a pencil or a pen is introduced into the clip (24).
  • the distance between the tip of the sharp metal end and the tip of the writing instrument would form the radius of the circle or the circular arc to be drawn.
  • the radius can be varied by adjusting the angle of inclination of the writing instrument to the longitudinal axis of the leg member.
  • As the clip can rotated 360° about the joint means it is possible to vary the radius from a very small measure to a large measure.
  • the circle or the circular arc is drawn by holding the grip means (16) between the thumb and fore-finger and rotating the leg member about its longitudinal axis.
  • the invention can suitably be made of rigid material such as metals or rigid plastics.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
EP92300905A 1991-02-04 1992-02-03 Compas de dessin Withdrawn EP0500228A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI9100161 1991-02-04
MY9100161 1991-02-04

Publications (1)

Publication Number Publication Date
EP0500228A1 true EP0500228A1 (fr) 1992-08-26

Family

ID=19749644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92300905A Withdrawn EP0500228A1 (fr) 1991-02-04 1992-02-03 Compas de dessin

Country Status (1)

Country Link
EP (1) EP0500228A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2846911A1 (fr) * 2002-11-08 2004-05-14 Gregoire Vallancon Dispositif permettant de maintenir deux instruments d'ecriture ou de marquage et d'en regler l'angulation pour former un compas

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB669909A (en) * 1949-03-28 1952-04-09 Richard Denny Molesworth Improvements in or relating to drawing instruments
US2981001A (en) * 1959-08-06 1961-04-25 Carl T Schnell Blackboard compass
US3537181A (en) * 1969-03-03 1970-11-03 Educational Tools Inc Circle maker apparatus
DE2750277A1 (de) * 1976-12-13 1978-06-15 Hans Walder Halter zur befestigung eines schreib- oder zeichengeraetes an einem zirkel
DE2726345A1 (de) * 1977-06-10 1978-12-14 Werner Cronacher Halter fuer schreibgeraete
US4542587A (en) * 1984-01-24 1985-09-24 Emerson Clarence A Drawing compass apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB669909A (en) * 1949-03-28 1952-04-09 Richard Denny Molesworth Improvements in or relating to drawing instruments
US2981001A (en) * 1959-08-06 1961-04-25 Carl T Schnell Blackboard compass
US3537181A (en) * 1969-03-03 1970-11-03 Educational Tools Inc Circle maker apparatus
DE2750277A1 (de) * 1976-12-13 1978-06-15 Hans Walder Halter zur befestigung eines schreib- oder zeichengeraetes an einem zirkel
DE2726345A1 (de) * 1977-06-10 1978-12-14 Werner Cronacher Halter fuer schreibgeraete
US4542587A (en) * 1984-01-24 1985-09-24 Emerson Clarence A Drawing compass apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2846911A1 (fr) * 2002-11-08 2004-05-14 Gregoire Vallancon Dispositif permettant de maintenir deux instruments d'ecriture ou de marquage et d'en regler l'angulation pour former un compas

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Effective date: 19930227