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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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3521361 |
INSTRUMENT FOR INSCRIBING AN ELLIPSE
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3820245 |
DRAWING PROJECTOR FOR REPRODUCING CURVES
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3476974 |
DIGITAL CONTROLLED ELLIPTICAL DISPLAY
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3469319 |
ELLIPSE CIRCLE DRAWING INSTRUMENT
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3461564 |
ELLIPSE-FORMING COMPASS
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3447243 |
ELLIPSOGRAPH
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3422538 |
MOTION GENERATING MECHANISM
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3422531 |
HEDGE TRIMMER
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3367030 |
Compensated ellipsograph
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3298104 |
Geometric design instrument
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3269014 |
Drafting method and machine
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3267030 |
Extinguisher powders based on alkali metal bicarbonates
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3266148 |
Asw tactical plotter
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3237309 |
Epicyclic compass
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3230623 |
Variable angle perspective display device operable with ellipsograph
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3167863 |
Ellipsograph
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3154856 |
Drawing instrument
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3137945 |
Ellipsograph
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3100346 |
Scribe
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3067853 |
Apparatus for handling sheet material
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3065545 |
Ellipse guide
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3058219 |
Uni-axial pantograph
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2961769 |
Planetary ellipsograph
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