Abstract: The present disclosure discloses a measuring and drawing device. The measuring and drawing device comprises a supporting frame, a rotation driving portion, a reciprocation driving portion, a drawing member, a distance measuring sensor, an angle sensor, and a control module. A first motor is configured to drive the rotating arm to rotate relative to the supporting frame, and a second motor is configured to drive the drawing member to reciprocate along the rotating arm to enable the drawing member to move in two dimensions. The distance between the first motor and the drawing member is measured through the distance measuring sensor to achieve measuring of a length of a line segment, and the rotating angle of the rotating arm relative to the first motor is measured through the angle sensor to achieve measuring of the rotating angle.

Abstract: 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 simultaneous pivotal and translatable movement with respect to the base plate. The first member has a first pivot point that is movable along a first axis, while the second member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The first and second members are operably connected to each other at the first and second pivot points. A knob is connected to one of the pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the second member to rotate and slide in an elliptical pattern with respect to the base plate.

Abstract: 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 simultaneous pivotal and translatable movement with respect to the base plate. The first member has a first pivot point that is movable along a first axis, while the second member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The first and second members are operably connected to each other at the first and second pivot points. A knob is connected to one of the pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the second member to rotate and slide in an elliptical pattern with respect to the base plate.

Abstract: 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 mounted on the clickerplate. One embodiment of this invention comprises a storage compartment in the knob which can hold, for example, extra blades. A further embodiment of this invention comprises an arm that translates through the clickerplate and a swivel plate used for setting the overall size of the oval by locking the arm at a set length. In yet a further embodiment of this invention, ovals can be rendered in either a clockwise or a counterclockwise direction and an arrow can indicate the direction in which the apparatus is set to render ovals.

Abstract: A cutting device is operable with one hand for cutting an elliptical shape in a sheet of material. The cutting device includes an elliptically-shaped base plate for placement on the sheet material and a cutting member for simultaneous pivotal and translatable movement with respect to the base plate. The base plate has a first pivot point that is movable along a first axis, while the cutting member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The base plate and cutting member are operably connected to each other at the first and second pivot points. A knob is connected to one of pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the cutting member to rotate and slide in an elliptical pattern with respect to the base plate to thereby cut an elliptical shape in the sheet of material.

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.

Abstract: A device for circumscribing selectively both circles and also ellipses of variable proportions includes a housing in which is rotatably mounted an armature. The armature is constrained to move on two axes disposed at right angles to one another, so as to enable elliptical shapes to be generated. One such axis is provided by a rectilinear channel in the base of the device, in which is engaged a follower operatively attached to the armature; the other axis is provided by a rectilinear slot formed through the cover of the device. A hub is engaged in the cover slot and is assembled with the armature; it can be moved to any selected position along a rectilinear axis of the armature without disassembly, and can be secured in position by tightening of a clamping mechanism. In one position the axes of rotation of the hub and the armature are aligned, to thereby cause the device to circumscribe a circle; in other positions the axes are offset, thereby conditioning the device for circumscribing ellipses.

Abstract: A device for circumscribing selectively both circles and also ellipses of variable proportions includes a housing in which is rotatably mounted an armature. The armature is constrained to move on two axes disposed at right angles to one another, so as to enable elliptical shapes to be generated. One such axis is provided by a rectilinear channel in the base of the device, in which is engaged a follower operatively attached to the armature; the other axis is provided by a rectilinear slot formed through the cover of the device. A hub is engaged in the cover slot and is assembled with the armature; it can be moved to any selected position along a rectilinear axis of the armature without disassembly, and can be secured in position by tightening of a clamping mechanism. In one position the axes of rotation of the hub and the armature are aligned, to thereby cause the device to circumscribe a circle; in other positions the axes are offset, thereby conditioning the device for circumscribing ellipses.

Abstract: 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 straight side of the base plate, and an x-axis movable member movably mounted on the base plate for movement along an x-axis which extends parallel to the straight side. The x- and y-axes are brought into alignment respectively with the major and minor axes of an ellipse to be drawn. The elliptical curve follows the path of movement of a point which is spaced from the circumference of a circle which is concentric with the ellipse and whose radius is A, equal to half of the minor axis of the ellipse, by a distance, parallel to the x-axis, which is equal to B cos.theta. where B is the half of the difference between the major axis 2(A+B) and the minor axis 2A of the ellipse and .theta. is the angle formed between the length B and the x-axis.

Abstract: A mechanism is provided for circumscribing oval paths, wherein a pivotably mounted element is dynamically oriented so as to maintain a functional axis thereof constantly tangent to the circumscribed path. An orienting arm attached to the mounted element is arcuately reciprocated by an element moving unidirectionally in a circle, the direction of circular movement being opposite to that in which the mounted element proceeds.

Abstract: A trammel-beam ellipsograph is disclosed wherein the beam is made of two sliding elements in parallel relationship with a scribe-bearing cursor riding upon them. Each beam element is pivotably attached at one end to a slide restrained within one of two perpendicular tracks. A scale on each beam element indicates the distance from the pivot relating to each respective slide to the scribe on the cursor, thereby indicating a measure of the major and minor axes of the ellipse to be scribed. Concentric ellipses having a uniform elliptical annulus therebetween may be drawn by holding the beam elements against sliding while moving the cursor a distance equal to the width of the annulus. The invention further features modular track sections to facilitate drawing ellipses of aspect ratios greater than 2:1. A trammel-beam ellipsograph is disclosed wherein the beam is made of two sliding elements in parallel relationship with a scribe-bearing cursor riding upon them.

Abstract: An apparatus for forming elliptical shapes on a workpiece. The invention involves a support frame which includes a pair of uprights having cantilevered beams from which are suspended a support disk. A pair of mutually perpendicular trammel tracks are set into this support frame. A journaled block is mounted into each trammel track. A trammel beam is rotatably mounted to the two journaled blocks, and a tool attached to the trammel beam, so that as the trammel beam rotates, with the blocks restricted to slide each only in its own track, the tool is required to follow an elliptical path. A ring is caused to revolve about the support frame by a prime mover. Attached to the ring is a bearing block, which slideably holds one end of the trammel beam. Thus as the ring revolves, the beam is caused to automatically and continually rotate, with the tool following its elliptical path.

Abstract: Drafting instrument for drawing ellipses using scribe arm and members capable of being pivotally connected at two points along the scribe arm, one of the members being constrained to move along a straight line congruent to the minor axis and the other of the members being constrained to move along a straight line congruent to the major axis, as the members reciprocate along their respective lines, a point of the scribe arm describes an ellipse.

Abstract: An ellipse drawing device is disclosed which utilizes mounted on its lower surface a rotary arm and an elongated plate in conjunction, generating a straight line motion of a point on the elongated plate, grouped in perpendicular relation to the grooves on its upper and parallel surface to guide a stylus carrying arm in the desired course.

Abstract: A trammel beam carrying a pair of dove-tail shaped slider blocks rotatably carried on a pair of adjustable trammel points is attached to a workpiece support base which includes a pair of crossed right angle mutually perpendicular dove-tail tracks along which the slider blocks move as the trammel beam or workpiece support base are rotated relative one another. The trammel beam is provided with means permitting it to be mounted to a router or other cutting machine so that if the workpiece support base is attached to the surface of a workpiece, relative movement between the cutting machine and the workpiece will be restricted to an elliptical path as the movement is guided by the trammel.

Abstract: A device for describing an ellipse. An enclosed arcuate first slot extends through a cylindrical shell. A path-generating disc fits inside the shell and enables the shell to rotate relatively thereto, and to it is secured a square bottom plate having a plurality of sharp points for centering the device. The disc has a diametrically-extending slot and, perpendicular thereto, a diametrically-extending recess in its upper surface. A cylindrical cam has a path-defining circular projection that rides snugly back and forth in the disc's recess. A cylindrical face of the cam has a radial opening aligned with and leading into another diametrical slot and a tangential opening parallel to that slot. An eccentricity-determining rod fits through the radial opening into the cam's slot, with sliding adjustment; its inner end extends out vertically into the disc's slot, for movement back and forth therealong.

Abstract: 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 to a straight line B, B' while maintaining two angles .theta. and .theta.', which are formed between the straight lines B, B' extending between centers of the bed seats or supports and left and right arms about the center, equal to each other.

Abstract: A drafting instrument for tracing curves such as ellipses. The instrument includes a base which is movable over a graphics surface. A marking element is carried by a writing arm connected with the base by linkage means which guides the marking element along a predetermined curvilinear path. The linkage means includes a master arm pivotally mounted at one end on the base for sliding movement along the minor axis and pivotally mounted at its other end on the writing arm by an articulated joint which is adjustable along the writing arm to selectively vary the minor axis apex of the curve being drawn. The linkage means also includes a slave arm pivotally mounted between the base and a midportion of the master arm. Another articulated joint is mounted on the base for sliding movement along the minor axis and is adjustably connected with the writing arm for selectively varying the major axis apex of the curve being drawn.

Abstract: Apparatus for tracing elliptical curves comprising a T-shaped support member having perpendicular longitudinal and transverse branches and formed as a one piece injection molded body. The T-shaped member carries a point support on the longitudinal branch for piercing a tracing surface on which a curve is to be reproduced. Two sliders are respectively supported in recesses in the branches and the sliders are coupled together for correlated movement in the branches. A marking element is supported by the coupling for tracing a curve on the tracing surface in accordance with the movement of the sliders.

Abstract: An ellipse drawing instrument employing a drawing arm, and a pair of members adapted to be connected to the drawing arm at two spaced points on the drawing arm, one of the members being constrained to move along a first path and the other of said members being constrained to move along a second path crossing the first path so that in use, as the members reciprocate along their respective paths, a point of the arm describes an elliptical path.The paths are linear and perpendicular to each other.

Abstract: A device for cutting ovals or circles in sheet material. A baseboard is secured adjustably atop a parallel pair of base channels by a combination of screws and coil springs. A base plate secured to one end of the baseboard supports (1) a pair of swivel-mounted hold-down arms and hold-down pads having swivel-mounted, spring-urged pads; (2) a tee bar with a slidably mounted scaled flat shank portion and a crossbar with a center index line; and (3) an upright frame member. The upright frame member supports a horizontal frame member extending forward over the baseboard and having a pair of spaced-apart transverse guide bars with a longitudinal opening extending in between them. A circular disc is mounted for rotation by a handle, within and tangent to the transverse guide bars, and the disc has a slot extending radially from about the center out toward the circumference of the disc.

Abstract: An ellipsograph characterized by a pair of rectilinearly slideable members disposed in 90.degree. crossing relationship and adjustable radii crankpins for moving same, forming a pair of Scotch yokes, and a stylus carrying member slideably engaging both members in the locus of their crossing, adapted to resolve the rectilinear movements of the members into elliptical movement.

Abstract: 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 swivel arm, a swaying lever coupled to the movable plate and the swivel arm, and a writing implement carriage coupled to the movable plate and the swaying lever. When the swivel arm is turned, the writing implement carriage is given movements in two directions which are synthesized into an elliptical motion with respect to the material on which the ellipse is to be drawn.