Class 33/30.1 - Ellipsograph

Subclass of Class 33 - Geometrical instruments
Definition: Subject matter wherein the curve has a major and a minor
No. of patents: 29
Last issue date: 02/13/2007

Number	Title	Issue Date
7174645	Method for designing of aproximate elliptical structure and the same A method for designing an elliptical structure with an outline of an approximate elliptic curve, which is generated by connecting circular segments to one another, and an elliptical structure created on said method. A first fixed point is established outside the ell...	02/13/2007
7080459	Thread ruler and a multi-function drafting instrument The Thread Ruler and Multi-Function Drafting Instrument is a single instrument designed to draw circles, ellipses and parallel lines, and which includes features that allow the instrument to function as protractor, a ruler and a drawing compass. The instrument has a...	07/25/2006
7010860	Hand-held cutting device A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second member for...	03/14/2006
6904697	System for marking an arc segment This device facilitates field marking an arc of a circle having an obstructed center. It comprises a first clamp having a slot to engage a standard tape measure and a second clamp having another slot to engage a color-coded tape measure. A detachable swivel joint sn...	06/14/2005
6823764	Apparatus for boring stoma wafers An apparatus for boring stoma wafers is provided, which comprises a base and a cutter, and enables even a user himself to easily make in a stoma wafer a substantially elliptic hole having a beautiful inner circumference. The base comprises an upper base member on wh...	11/30/2004
6668461	Hand-held cutting device A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second...	12/30/2003
6484406	Hand-held cutting devices A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second...	11/26/2002
6374503	Oval cutter An apparatus for rendering ovals of adjustable sizes and ellipticity upon various materials. An oval cutter comprises a clickerplate for adjusting the ellipticity of ovals in a single movement. The clickerplate can be rotated about a base using a knob mou...	04/23/2002
6308426	Ellipsograph Disclosed is an ellipsograph for drawing an ellipse. A base member for defining one side, that is, a base of a triangle, is provided and fixed to a plane of a drawing sheet. A centering section and an ellipse drawing frame are installed at a middle of the...	10/30/2001
6276067	Ellipse drawing/cutting device An ellipse drawing/cutting device is made up a base plate, a driving gear, a coil spring, a driven gear, a position retaining arm, a compression spring, a longitudinal measurement disc, a first fixing ring cover for the longitudinal measurement disc, a la...	08/21/2001
6158133	Oval cutter An apparatus for rendering ovals of adjustable sizes and ellipticity upon various materials. An oval cutter comprises a clickerplate for adjusting the ellipticity of ovals in a single movement. The clickerplate can be rotated about a base using a knob mou...	12/12/2000
5870830	Conic section compass Conic Section Compass (CSC) is a hand-held drawing device. It applies a mathematics concept. CSC can be used to draw circles, ellipses, parabolas, hyperbolas or make surface curvatures of these types. Given a specific mathematics formula of the mentioned ...	02/16/1999
5546664	Compass able to draw any-size ellipses A compass able to draw any-size ellipses consists of a body, a first and a second position ring, a movable rod, a pen rod, a position rod and a coil spring. The first and the second position ring are screwed on an upper and a lower portion of the body res...	08/20/1996
5493780	Tool for carpentry calipers for curved frames with joined end corners A device for making a frame having at least two adjacent portions of distinct curvatures with a rounded joint between these two portions comprises a conventional carpentry caliper for outlining at least one of two portions on the frame, an accessory unit ...	02/27/1996
5189800	Device for drawing elliptical curves An elliptical curve drawing device draws an ellipse having desired minor and major axes along given central axes. The device includes a y-axis movable member movably mounted on a base plate for movement along a y-axis which extends perpendicularly to a st...	03/02/1993
5123170	Ellipsograph as a drafting tool An ellipsograph including a connecting rod carrying a collinear rotary end, scriber, and reciprocating end. The rotary end provides rotation about selected circumferences for that end of the connecting rod, while the reciprocating end permits reciprocatin...	06/23/1992
5123171	Irregular surface ellipsograph An apparatus, of a compact pocket-sized design, for the description of accurate ellipses of an infinite number of conjugate and transverse diameters on flat and/or irregular surfaces, such as spherical or horizontal and vertical cylindrical tanks, having ...	06/23/1992
5056230	Ellipsograph structure An ellipsograph structure has first and second arms coupled by pin connections to each other and to a rotatable driving member slidably mounted on a member extending between end supports along a longitudinal axis. A straight line motion mechanism is mount...	10/15/1991
4688331	Ellipsograph The crank guide rod mechanism for performing nearly rectilinear motion is formed by using the mathematical method from which is designed the ellipsograph of the hidden cross-groove principle employing two points of support for the suspension-extension sup...	08/25/1987
4624057	Method and template for circle layouts A method and apparatus for positioning matting for picture frames and the like under an oval cutter so that ovals or other configurations can be cut in the matting about the perimeter of circles of varying diameter. The positioning template comprises a fi...	11/25/1986
4571837	Ellipsograph An improved ellipsograph for drawing ellipses, ovoids and circles comprises a frame, a slide block, a disc, a worm wheel, a pivot adjusting block, a stub adjusting block, a motor, a battery holder and a drawing arm. The disc and the worm are screwed toget...	02/25/1986
4570344	Ellipsograph A scriber arm mounted to two synchronized cranks, one of which defines the minor axis of the ellipse while the other defines the major axis....	02/18/1986
4445275	Drawing assembly A drawing assembly configured for outlining the margin of a mat having a generally elliptical-shaped cut therein in a pattern replicating that of the cut, adapted for attachment to the mat cutting apparatus employed to make the cut, is comprised of a carr...	05/01/1984
4182043	Drawing instrument for an ellipse A drawing instrument for drawing an ellipse having two arms extending to left and right associated with operating mechanisms, so that when the arms are opened by a turning force of a first arm, a center moves along the straight line C, C' at a right angle...	01/08/1980
4150487	Instrument for tracing curved figures particularly ellipses A hand-held compass-type instrument for tracing curved figures, particularly ellipses, is described comprising a manipulatable finger-gripping element; an anchor arm pivotably mounted at one end to one end of the finger-gripping element, the opposite end ...	04/24/1979
4048724	Ellipsograph An ellipsograph characterized by a pair of rectilinearly slideable members disposed in 90° crossing relationship and adjustable radii crankpins for moving same, forming a pair of Scotch yokes, and a stylus carrying member slideably engaging both members ...	09/20/1977
4045875	Ellipsograph drafting apparatus This invention is an ellipsograph drafting apparatus operable to draw ellipses of any desired ratio of major and minor axes limited only by practical size of the device. The ellipsograph drafting apparatus includes a main support means, an elliptical cont...	09/06/1977
4014101	Ellipse drawing instrument An ellipse drawing instrument which makes it possible to draw an ellipse easily and precisely without requiring special skill. The size and angle of the ellipse can be changed steplessly by a simple adjustment. It includes a base plate, a movable plate, a...	03/29/1977
4010546	Ellipse drawing instrument There is provided an ellipse drawing instrument the design of which is based upon the theory of orthogonal projection of a circle comprising a first leg having a pin point to be fixed on the surface to be drawn and a second leg having a drawing tip to be ...	03/08/1977

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Class 33/30.1 - Ellipsograph