947results about "Circular curve drawing instruments" patented technology

A multi-function layout square of modular construction having a laser that is capable of performing multiple functions is disclosed. The multi-function square has a metallic outer casing with magnetic properties, with a protractor plate slidably, pivotally, and removably attached by thumbscrews to the casing that can be moved and rotated with respect to the casing and slid linearly along a portion of the length of the casing. When the protractor plate is removed the casing may be used as a level, a plumb bob, a ruler, and a compass. When the protractor plate is attached the tool may be used as a framing square, roofing framing square or rafter square, and a gauge or scribe for straight lines, arcs, or circles. The laser, a switch, and a pair of bubble level vials are contained in a module installed at one end of the casing, and a second module containing batteries is removably installed at the other end of the casing. Each module has electrical contacts that engage the interior surface of the casing and contacts that engage the batteries when the modules are installed and abutted. When the switch is on, a circuit is completed through the metallic casing, which electrically connects the batteries to the laser. The casing may be suspended vertically from a support surface by passing a string or wire through a bore in one of the thumbscrews, may be mounted on a tripod, or may be magnetically attached to metal objects.

An apparatus and method for improving the compression efficiency of a motion vector by efficiently predicting a motion vector in an enhanced layer from a motion vector in a base layer in a video coding method using a multi-layer structure are provided. The method includes obtaining a motion vector in a mother frame of a base layer that is temporally closest to an unsynchronized frame of a current layer, obtaining a predicted motion vector from the motion vector in the mother frame considering the referencing direction in the mother frame and in the unsynchronized frame and distances between the mother frame and a reference frame and between the unsynchronized frame and a reference frame, generating a residual between the motion vector in the unsynchronized frame and the predicted motion vector, and encoding the motion vector in the mother frame and the residual.

An improved tape measure apparatus which can be used as a marking gauge and/or compass comprising a tape measure, an insert comprising a base, a guide attached to the base and generally parallel to graduated indicia markings of the rule blade when extended from the tape measure whereby the graduated markings of the tape measure's rule blade may be read. An alternative embodiment includes an insert enabling standard tape measures to be used as marking gauges and/or compasses.

The present invention relates to target acquisition and related devices, and more particularly to telescopic gunsights and associated equipment used to achieve shooting accuracy at, for example, close ranges, medium ranges and extreme ranges at stationary and moving targets.

An adjustable carpenter's square for the quick and reproducible measurement of angles and radii. The adjustable carpenter's square includes a center bar that includes a set of indicia. The indicia are any appropriate set of graduations, which may include numerical notations. A indicator slide is receivable onto the center bar. The indicator slide includes a first and second slide strut pivot. A first and second strut attach to the indicator slide. A first wing attaches to the center bar and the first strut. The first wing also includes a first wing strut pivot. The first wing strut pivot hingably connects the first wing to the first strut. The first wing strut pivot attaches to the first strut. A second wing attaches to the center bar and the second strut. The second wing includes a second wing strut pivot. The second wing strut pivot hingably connects the second wing to the second strut. The first and second wings pivotably connect to the center bar. The indicator slide connects to the first and second struts. A measured relation is formed between the first wing with the second wing. The position of the indicator slide on the center bar is relatable to the measured relation by way of the set of indicia displayed on the center bar. The measured relation can include such values as: angles, pitches, radii, diameters, distances, segments, arcs and chords.

A method for defining a regular or irregular shape utilizes a template apparatus including a plurality of radially-adjustable corner members connected by length-adjustable straight edge members. The corner members include an angle scale to display the defined angle, while the edge members include a length scale to display the defined length of that edge.

A multipurpose angle measurement tool generally comprises a top ruler and a bottom ruler which are rotationally attached to each other. Both the top and bottom rulers have both metric and american measurement indicias. The top ruler has a vernier window through which are seen degree angles. A tightening knob controls a tightening means which allows the possibility of selectively choosing whether the two rulers should be locked in a given configuration or allowed to freely move relative to each other such as when indicating deviation from the horizontal or the vertical by letting one of the rulers (top or bottom) swing as a pendulum and be stopped by gravity.

The objective of this invention is to provide a solution that enable real, delayed or relayed time trade and delivery of time-tagged electronic information items from/among same or different regions' information content providers (190a, 190b) and/or their subscribers (201, 202, 211, 212, 221, 222) , or via their corresponding region's information content network operators and their subscribers (201, 202, 211, 212, 221, 222). In order to realize the objective, this invention provide a system to select wanted information items and package the unselected or for-not-use information items in specified time frame by mapping and grouping via a grid/matrics to packaging, labeling and pricing the items into for-trade-items or dealpacks and register them into trading database (200); a system for dealpack listing, online searching and purchasing; and dealpack's secret key submitting, verifying, encrypting transmission and decrypting delivery.

An apparatus and method for a hinged measuring and marking device is disclosed herein. The device utilizes a first member, containing a flat surface with a straightedge for marking or measuring, coupled to a second member, also containing a flat surface with a straightedge for measuring or marking wherein the first member is coupled to the second member in a direction perpendicular to the straightedge of the first member. The straightedges of the first and second members are coplanar for marking an approximately contiguous line on a single plane or on two intersecting planes. The first member and the second member can be rotated between 0 and 180 degrees with respect to each other to accommodate marking a line on the two intersecting planes.

A device for calculating where a cue ball must cause an object billiard ball to strike the bumper of a billiards table in order to drive the object ball into a selected pocket of the billiards table of the type having two opposed end rails and two opposed side rails. The device includes a plotting board and a guide. The plotting board comprises a scaled playing table portion and at least one scaled mirror table portion having pocket positions formed thereon, wherein the mirror table adjoins at least one of the opposed end rails or opposed side rails and is a mirror image of the playing table portion. The plotter comprises a guide and an object ball arm, the object ball arm having a pocket guide end and an object end. When the guide is placed over a selected pocket position on the mirror table portion and the object ball end of the object ball arm is aligned with the object ball on the scaled playing table and the pocket guide end is aligned with the guide over the selected pocket position, the object ball arm will cross the scaled playing table at a point where the object ball must strike the bumper of the billiards table.

Current methods for station keeping an object in the ocean or body of water involve mooring assemblies or active and complex navigation and differential thrust or thrust and rudder assemblies. The embodiments herein provide a method and device for compensating for the force of water or ocean currents through the use of a hydrofoil assembly to orient a device in the water current direction, through the use of any number of devices for sensing water current force, and through the use of a motor assembly to produce sufficient thrust to compensate for water current drift. An alternate embodiment allows the method to be employed without sensing the force of the water current. The method does not require directional thrust or active rudder assemblies, is highly portable, utilizes minimal power, is light weight, is scalable, and can be operated in any body of water.

A measuring and layout device having a stationary member having a flat surface adapted to be marked on and an angle and distance device rotatably coupled to the stationary member. The angle and distance device includes a longitudinally and laterally rigid extendable tape that can be extended from a central point and that has an edge that facilitates reliably marking on the stationary member to form an accurate template as the angle and distance device is rotated and the tape is extended and retracted to critical features of an area.

A multi-functional carpentry tool includes a base member having a longitudinal T-shaped groove formed therewithin and a rule member. A T-shaped slide member is positioned within the groove and has a threaded aperture formed therewithin. A knob has a threaded stem operatively received within the threaded aperture for selectively securing the base member and the rule member together in frictional engagement maintaining the base member and the rule member in selected positions relative to one another and permitting each of a sliding and pivoting movement of the rule member relative to the base member. Linear measuring scale indicia is provided in each of the base and rule members. Angular measuring scale indicia and a squaring groove is also provided within the base member. A spring biased pin is movably mounted within the knob for defining pivot axis and facilitating arc scribing effort.

An improvement in a compass that marks large radius arcs is disclosed. The compass is for marking on flat surfaces like the ground and walls where higher degree of accuracy for the radius or circle is desired. More particularly, the present flat compass allows a person to create a virtually unlimited radius arc using a center point and a rigid arm with a marking tip. The flat compass uses a rigid flat ruler with an embeddable anchor, such as a nail, on one end and a marking tip on the other that keeps the rigid arm essentially parallel with the marking surface as the surface is being marked. The marking tip is movable along the length of the rigid flat ruler. Multiple rulers can be connected to increase the size of the arc that will be drawn.

A wound measuring device and system measures the length, width and depth of a wound. The device and system features first and second ruler members connected and secured by a connecting member which allows the ruler members to move to measure the length and width of a wound. The connecting member affords perpendicular movement of the ruler members providing accurate and consistent measurement of wounds irregular in shape and size. An end of the first or second member is designed to be inserted in the wound to measure the depth and undermining of the wound. Use of the device provides little to no discomfort to the patient.

A drawing compass with a structure of L shape and a method of using the same provide improved single-hand manipulation and handling of drawing an arc or circle. The drawing compass comprises a handle rotatably mounted on one end of an arm and a pivot pin holder slidably mounted along the arm. One can make an arc or circle by simply holding the handle perpendicular to a drawing surface, placing the pivot pin at the center and making a circular motion guided by the arm of the compass. In the drawing process, the pressure applied on the marking point is directly controlled by hand. The compass is easy to use, inexpensive, and simple to manufacture.

A pipe guide adapter adds marking slots and marking edges to a pipe guide. The pipe guide adapter includes two body sections joined by a hinge enabling the pipe guide adapter to be in open and closed positions. The body sections each include a gripping end and a marking section. The gripping end has a diameter greater than the diameter of the pipe guide to circumferentially grip a portion of the pipe guide in the closed position and to attach to the pipe guide. A pipe is circumferentially gripped jointly by the pipe guide and the pipe guide adapter. A hinge pin is partially disposed in the hinge and extends beyond the hinge. The hinge pin allows tie pipe guide adapter to be aligned to the pipe guide. The extended portion of the hinge pin acts as a stop and a spacer between the pipe guide adapter and the pipe guide.

A multi-purpose tool includes a graduated extension pivotably and lockably connected to a leveling extension. The graduated extension includes graduations for measuring length, angles, pitch, or a combination of these measurements. Angles may also be measured with a graduated disc. The leveling extension includes at least one bubble level for checking the horizontal or vertical orientation of the leveling extension. The leveling extension may include graduations for measuring length, angles, pitch, or a combination of these measurements. The tool may be extended such that the graduated and leveling extensions are collinear, having a total length of 16 inches end to end. A multi-purpose tool may be conveniently used to take the place of several separate tools such as a speed square, a T-bevel, and an extended torpedo level. The tool may also allow quick determination of the required distance between wall studs, rafters, and floor joists.