Ellipse Scribe
OwnerDaniel J. Houstoninventor
Life of this patent
Estimating the term…
Abstract
An ellipse scribe for writing or cutting an ellipse onto or into a workpiece. Two perpendicular tracks each include a slider block which is capable of reciprocating within the tracks. The slider blocks are rotatably affixed at different points along the length of a scribe beam with a cursor mounted at one end of the scribe beam. The cursor scribes out an ellipse as the slider blocks reciprocate through a full cycle of motion. The size of the ellipse may be changed by disengaging the slider blocks from the scribe beam and translating the slider blocks within an adjustment track on the scribe beam to different points on the scribe beam. The scribe beam includes a removable scale whereby the locations of the slider blocks along the scribe beam may be determined, allowing the size of the ellipse to be accurately set.
Claims20
A contact beam ellipse scribe apparatus comprising:
- a. a first track including a block aperture therein;
- b. a second track oriented perpendicularly to the first track and intersecting the first track at a centerpoint;
- c. a scribe beam including an elongated beam element with a scribe end and an adjustment track located on and substantially parallel to the elongated beam element;
- d. a first slider block slidably engaged within the first track and including an anchor hole therein, wherein the first slider block may be slidably located within the first track so that the anchor hole and block anchor aperture may be collinearly aligned;
- e. a first adjustment pin which rotatably engages the first slider block;
- f. a second slider block slidably engaged within the second track, wherein the first track and the second track each comprise keyways in which the first slider block and the second slider block are respectively adapted to slidably fit;
- and
- g. a second adjustment pin which rotatably engages the second slider block;
- h. an anchor pin sized to be inserted within both the anchor hole and the block anchor aperture when the anchor hole and the block anchor aperture are collinearly aligned.
A contact beam ellipse scribe apparatus comprising:
- a. a first track including a block anchor aperture therein;
- b. a second track oriented perpendicularly to the first track and intersecting the first track at a centerpoint;
- c. a first slider block slidably engaging the first track and including an anchor hole therein, wherein the first slider block may be slidably located within the first track so that the anchor hole is collinearly aligned with the block anchor aperture;
- d. a second slider block slidably engaging the second track;
- e. a scribe beam including an elongated beam element with a scribe end and an adjustment track located on and parallel to the elongated beam element;
- f. a first adjustment pin rotatably connected to the first slider block and located within the adjustment track so as to be slidably connected to the scribe beam;
- g. first fixture means for affixing the first adjustment pin to the scribe beam in such a manner as to prevent sliding of the first adjustment pin with respect to the scribe beam;
- h. a second adjustment pin rotatably connected to the second slider block and located within the adjustment track so as to be slidably connected to the scribe beam;
- and
- i. second fixture means for affixing the second adjustment pin to the scribe beam in such a manner as to prevent sliding of the second adjustment pin with respect to the scribe beam;
- j. an anchor pin sized to be inserted within both the anchor hole and the block anchor aperture when the anchor hole and the block anchor aperture are collinearly aligned.
Dependencies are inferred from the claim text.