259results about "Slippage prevention" 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.

A tool for measuring, marking, and cutting material, the tool formed of a rigid sheet of transparent material having a transparent flexible sheet of pressure-sensitive material removably adhered thereon to cover one side of the rigid sheet and provide a removable, non-slip surface. One or the other of the rigid and flexible sheets has a plurality of lines formed thereon, preferably two-color lines, to aid in measuring and marking material. The pressure-sensitive material is formed of a non-static cling vinyl film having plasticizers that continually migrate to the surface of the film.

A measuring device includes a square ruler body provided with a plurality of scales, a plurality of marking lines, and a plurality of counting numbers. Each of the counting numbers has a corresponding numeral which is located under the respective the counting number for measurement of different directions. Thus, the measuring device is used to measure the size of the workpiece at any direction and any start point, thereby greatly saving the measuring time and the manual work. In addition, the counting numbers have a two-dimensional corresponding manner so that the measuring device can obtain the size of the workpiece instantaneously from left to right or from right to left without having to rotate or change the direction of the ruler body.

A device for marking upon a surface including a body assembly made of a resilient material, a cover member, a base assembly and a bottom cover. The body assembly has an outer wall, a central opening an upper end and a bottom end. The base assembly includes a marker rigidly attached to the center of the upper surface and a bottom surface. The upper surface is fixedly secure upon the bottom end of the body assembly in a way that the marker is housed within central opening. The bottom cover protects bottom surface. Cover member protects the upper end and the opening of the body assembly and prevents the marker from drying when the device for marking is not in use.

The invention provides an integral plotter, and relates to a plotter. The integral plotter comprises two bases (1) and a first polished rod shaft (2), wherein the first polished rod shaft (2) is used for connecting the two bases (1); a slide block (3) is arranged on the first polished rod shaft (2); one end of a second polished rod shaft (4) is hinged to the first polished rod shaft (2) through the slide block (3); a slide groove (5) is formed in the second polished rod shaft (4); an M-shaped rod (6) is arranged under the slide groove (5), and is hinged to the slide groove (5) through a slide block (8); an N-shaped rod (7) is arranged at the parallel surface under the M-shaped rod (6), and is hinged to the M-shaped rod (6) through a shaft sleeve (9); a chalk support frame (10) is arranged at one end of the N-shaped rod (7). The integral plotter has the advantages that by integrating multiple plotting tools, the plotting of lines, angles, circles, circular arcs and ellipses is realized; the carrying is convenient, the operation is simple, the fixing is convenient, and the accuracy of plotted drawings is higher.

A folding knife light tool with an ergonometric handle in which an illuminating means whether an LED or light bulb or a laser light is incorporated into the handle housing in the spaces existing between the blade, the locking mechanism, and the handle. A knife handle is provided having a body contoured for the hand. The housing is made from one molded piece with a slit in the middle. The handle includes a pivot point for supporting a blade between the longitudinal sides or scales of the blades. A conventional locking or non-locking system is utilized for keeping the blade open once it is unfolded. When the blade is folded, a portion of the blade extends above the sides of the knife handle for digital engagement in the opening operation.

A display device (10) for diagramming a play includes a housing (12) having a handle (14) for lifting and carrying the housing. A bottom (16) and sides of the housing form a recess is filled with a layer (18) of magnetic particles and a display panel (20) on which an outline of a field of play, or a portion thereof, is drawn. The panel fits over the layer. A stylus (24) has a tip end (26) which, when brought into contact with, or in close proximity to, an outer surface of the panel attracts the magnetic particles to the underside of the form an image (28-32) visible to anyone looking at the panel. The user can create as many images as he needs to diagram a play for his team. When done, the user draws a slide (36) underneath the length of the panel to erase the display.

A digital protractor for measuring angular displacement from a referenced surface includes a substantially congruent pair of pivotally interconnected upper and lower arms, which arms are superposable upon one another. Each arm has a pair of substantially parallel engagement edges extending longitudinally of the arm. One of the arms is engagable along an engagement edge thereof with the reference surface. A capacitive sensor is secured to the lower arm and a digital readout device is secured to the upper arm for operatively cooperating with the capacitive sensor to measure and display the angular displacement from the arm engaging the reference surface to the other arm.

An electronic ruler has a generally rectangular-solid shape defining a length, width, and thickness. A straight edge exists along the length as do distance markings in at least one unit of measurement. A user input interface 1) receives user inputs of measurement in a format corresponding to the unit of measurement, and/or 2) shows a measurement made automatically by the ruler. A plurality of visual indicators, such as fiber optics, LEDs, etc., extend along the length and light in an amount corresponding to the user inputs or the measurement made. In this manner, basic rulers for school-aged children provide measurement capability in the absence of sufficient gradations. It also gives feedback regarding correctness to stimulate learning in adolescent students. An optical array also serves to transmit/receive light to automatically take the measurements upon indications from a user. A processor connects to the indicators and array for controlling lighting.

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 ruler that is to be used for cutting sheets of material perpendicular to its longitudinal edges. The ruler is a longitudinal piece of rigid material that increases in thickness from one edge to the other. A cutting groove is placed into the rigid material at a thickened edge so as to aid the direction of a sharpened instrument passing through the groove while cutting the material. A hardened insert may be inserted into the groove to prevent the edges of the groove being damaged by the sharp cutting instrument. One end of the ruler has an extension of eyelet molded thereon and the other end of the ruler has a depression molded into an under surface of the ruler. Both the eyelet and the depression have a matching configuration to snap-fit into each other to thereby connect two rulers together in a rigid manner.

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.

A measuring device includes a bracket, a sliding ruler, a securing assembly, and a driving assembly. The bracket includes a first set of scale lines. The sliding ruler is slidably attached to the bracket and includes a second set of scale lines. The securing assembly includes a securing member and a resilient member mounted to the securing member. The driving assembly is rotatably attached to the bracket and includes a handle and a gear secured to the handle. The gear is rotatable to slide the sliding ruler relative to the bracket; the securing member is secured to the bracket, and the resilient member is secured between the sliding ruler and the bracket, to prevent the sliding ruler from sliding relative to the bracket.

A display device or diagramming a play includes a housing. A recess of the housing receives a display panel filled with a layer of magnetic particles and on which an outline of a field of play, or a portion thereof, is drawn. A stylus has a tip end which, when brought into contact with, or in close proximity to, an outer surface of the panel attracts the magnetic particles to the underside to form an image visible to anyone looking at the panel. The user can create as many images as he needs to diagram a play for his team. When done, the user moves a magnetic band underneath the length of the panel to erase the display.