# Patent

## Title
Multi-purpose utility level

## Abstract

A device for determining level of a surface, the device comprising a plurality of level vials configured to indicate orientation of the device, the plurality of level vials disposed at distinct locations on the device. The device including a radius bottom formed in an object contact surface at substantially the latitudinal center of the contact surface and extending longitudinally the length of the surface. The device further including a joint recess disposed centrally along the longitudinal axis of the device and extending latitudinally across the device. The device also includes one or more user controllable light sources coupled to the plurality of level vials for illuminating the level vials.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of the following provisional applications, each of which is hereby incorporated by reference in its entirety:
U.S. Ser. No. 61/298,712 filed Jan. 12, 2010; U.S. Ser. No. 61/361,433 filed Jul. 5, 2010.
This application is a continuation-in-part of the following U.S. patent applications, each of which is incorporated by reference in its entirety: U.S. Ser. No. 12/966,035 filed Dec. 13, 2010 which is a continuation of U.S. patent application Ser. No. 12/024,456 filed Feb. 1, 2008 which claims the benefit of U.S. provisional patent application Ser. No. 60/898,787 filed Feb. 1, 2007, each of which is hereby incorporated by reference in its entirety.


BACKGROUND
1. Field
The apparatuses and methods described herein relate to using diffuse light to facilitate detecting conformance of a surface to a requirement, such as a flatness of a surface.
2. Description of the Related Art
Equipment and techniques for determining flatness of a surface vary, but manual methods typically include using a trubar, a precision made cylindrical steel bar. However, a trubar is cumbersome to use in most applications. The trubar is simply a very accurate flat reference that can be placed against another surface when checking the other surface for flatness. To use a trubar, such as to check flatness of a snow ski, a user must position the surface of the ski to be checked substantially in a plane of the user's line of sight while placing the trubar on the surface and then moving the ski around to look for small amounts of ambient light passing through any gaps between the trubar and the surface. Detecting more than a small amount of the surface requires repositioning the ski in the line of sight before repeating the above procedure.
One exemplary drawback of this process is that without good lighting, it is difficult to detect critical variations in the surface being checked. Given the need to often reposition the object in the user's line of sight and reposition the trubar on the surface being checked, gaining good lighting becomes an additional step after each adjustment.
SUMMARY
Provided herein are apparatuses and methods for determining the flatness or non-flatness of an object. A method and apparatus for determining the flatness or non-flatness of an object may comprise providing an illuminated light dispersing elongated member with at least one substantially flat surface. In addition, the flat surface may project light, where a gap between an object placed against the flat surface and the flat surface may be highlighted by the projected light. In the method and apparatus, the apparatus may be a true bar. In some embodiments, the light source is an LED light.
The illuminated surface level detecting apparatus includes a light source an elongated body having an elongated substantially flat surface and at least one bubble level for indicating an orientation to horizontal of the elongated substantially flat surface, the light source supported by the body and disposed to illuminate a region along the elongated substantially flat surface. In use, an object brought into close proximity to the elongated substantially flat surface is illuminated by light derived from the light source. Also, the elongated edge of the substantially flat surface can be illuminated by the light source.
The illuminated surface level detecting apparatus can be adapted to include ruler markings. In such an adaptation, the ruler markings may be adjacent to an elongated edge of the substantially flat surface.
The light source may comprise a light emitting diode (LED) that may be capable of emitting one or more of green illumination, red illumination, white illumination, and blue illumination.
Alternatively, the illuminated surface level detecting apparatus may include a power source for providing power to the light source that may include one or more batteries. The power source may be housed in a recessed portion of the elongated body.
In another embodiment of the methods and systems described herein, an illuminated device for checking an orientation to horizontal may include an elongated flat surface for engaging a surface of an object; at least one bubble level disposed in relation to the elongated flat surface to facilitate indicating when the elongated flat surface is horizontal; a light source for illuminating a region in proximity to the elongated flat surface; and an elongated body comprising the elongated flat surface, the at least one bubble level, and the light source.
In use an object brought into close proximity to the elongated flat surface is illuminated by light derived from the light source. Also, the elongated edge of the substantially flat surface can be illuminated by the light source.
The illuminated surface level detecting apparatus can be adapted to include ruler markings. In such an adaptation, the ruler markings may be adjacent to an elongated edge of the substantially flat surface.
The light source may comprise a light emitting diode (LED) that may be capable of emitting one or more of green illumination, red illumination, white illumination, and blue illumination.
Alternatively, the illuminated surface level detecting apparatus may include a power source for providing power to the light source that may include one or more batteries. The power source may be housed in a recessed portion of the elongated body.
In an aspect of the present invention, a device for determining level of a surface is provided. The device includes a plurality of level vials, a grooved portion, one or more light source, and a pair of support legs. The plurality of level vials may be configured to take level measurements. Further, the plurality of level vials may be disposed at distinct locations on the device. The grooved portion may be formed at a substantially central part of the device along a horizontal direction. In addition, the one or more light source may be coupled to the plurality of level vials. The one or more light source configured to illuminate at least a portion of the device based on requirements. The pair of support legs may extend outward from the grooved portion. Further, the pair of support legs may facilitate a user to fix the device over the surface.
In an embodiment, at least one of the level vials of the plurality of level vials may be configured to determine level of a substantially horizontal surface. In another embodiment, at least one of the level vials of the plurality of level vials may be configured to determine level of a substantially vertical surface. Further, at least one of the level vials of the plurality of level vials may be configured to determine level of a surface substantially angled to the horizontal and the vertical surface.
Further, the grooved portion may be a window configured to place the device on the surface. Alternatively, the grooved portion may be a bridge configured to cover non-uniform portions of the surface. In an embodiment, the light source may be selected from one of a light emitting diode, a halogen lamp, a fluorescent lamp, and the like. In another embodiment, the light source may be an acrylic light diffuser. In addition, the device includes a switch that may be configured to activate the light source. The device may further include a plurality of sensors for controlling operation of the light source.
In another embodiment, the device may include bumpers that may be configured to absorb impact of shocks on the surface. Further, the device may be a digital level vial that may be configured to take measurements digitally. The device may also include a stud finder that may be configured to detect the presence of a stud in the object.
These and other apparatuses, systems, methods, objects, features, and advantages of the present invention will be apparent to those skilled in the art from the following detailed description of the preferred embodiment and the drawings. All documents mentioned herein are hereby incorporated in their entirety by reference.



BRIEF DESCRIPTION OF THE FIGURES
The invention and the following detailed description of certain embodiments thereof may be understood by reference to the following figures:
FIG. 1 depicts a side view of a self-illuminated embodiment of the surface gap detector;
FIG. 2 depicts a plan-view of a side of the surface gap detector that is opposite that depicted in FIG. 1;
FIG. 3 depicts the surface gap detector placed upon a concave object;
FIG. 4 depicts an end-view of the surface gap detector;
FIG. 5 depicts an exploded view of an exemplary embodiment of a power source for the surface gap detector light;
FIG. 6 depicts an exploded view of the assembly the surface gap detector of FIG. 4;
FIG. 7 depicts a perspective view of a level vial connected directly to a light source;
FIG. 8 depicts a perspective view of the light source connected to the level vial through a fiber optic tube;
FIG. 9 depicts a perspective view of a level vial highlighted due to back lighting;
FIG. 10 depicts a perspective view of a side vial of the level vial;
FIG. 11 depicts a perspective view of the level vial highlighted due to back lighting;
FIG. 12 depicts a perspective view of illumination of acrylic sheet;
FIG. 13 depicts a perspective view of a device fixed on a pipe;
FIG. 14 depicts a perspective view of the device illuminated due to the light source;
FIG. 15 depicts a perspective view of the device placed over a wooden plank;
FIG. 16 depicts a perspective view that illustrates the various surfaces of the device; and



DETAILED DESCRIPTION
A surface gap detector may facilitate detecting gaps, unwanted variations, or non-uniform surfaces by projecting light uniformly along the surface behind a flat edge placed against the surface. The surface gap detector may comprise a light source illuminating an elongated light dispersing material to generate the uniformly projected light. The surface gap detector and the surface to be checked do not need to be held so that ambient or other task lighting may pass between them because the light may be provided by the surface gap detector. The surface gap detector may produce colored light, such as, but not limited to, red light to better present a gap in the surface to the user. The surface gap detector may facilitate easily detecting features, gaps, surface irregularities, deviations, and the like that are less than one-sixteenth of an inch in size. The surface gap detector may present uniform light that is equally dispersed along the surface being checked so as not to flood portions of the surface of object in question, resulting in false gap detection or missed gap detection.
The invention can be used in a variety of industries and applications to determine either flatness, or the conformance of an item to a predetermined shape, such as a particular curvature. For example, the invention may be used in the skiing and snowboarding industry in determining whether skis, snowboards or their edges are flat. The invention may be used in the racing industry to determine whether an engine part is flat. In manufacturing, the invention may be used to determine whether a press tool or a manufactured part is flat or conforms to a certain shape. In a CNC machine shop, the invention may be used to determine whether a stamped or folded part is flat. Wood workers and wood finishers may use the invention to determine whether table tops or chair backs have flat surfaces. For sports with skates or edges, such as figure skating, ice hockey and bobsledding, the invention may be used to test the skates and edges. A curved version of the surface gap detector may be used in making bobsleds to test the surface of the bobsled blade. The above is for example only, and is not meant as an exhaustive list of uses.
This surface gap detector may provide benefits in the area of qualitatively determining the quality of certain surfaces. By including a light source in the surface gap detector, determining whether an object is flat may be easier, faster, less costly, more accurately accomplished, less stressful to the user, and the like. The light source may make it easier to determine flatness in working conditions where there is not enough light to properly determine a gap in a surface. For example, in the ski industry, without the surface gap detector herein disclosed, users may have to hold a ski in one hand with one end pressed against the user's cheek, and hold a trubar in the other hand. The user may then have to hold the ski and trubar up to a light source in order to determine if there are any spaces between the ski and the trubar. A self-illuminating surface gap detector may allow the user to leave the ski on a bench, table or other work space and observe light reflecting off of the ski through gaps in the surface. The self-illuminating surface gap detector may also make it safer to work on certain objects because, as in the ski example, the user may have both hands free to handle the surface gap detector. A self-illuminated surface gap detector that may project colored light on the surface being checked may also allow the user to more quickly check surface flatness (for example) by providing a source of light that may be brighter and may be a different color than ambient light, and by allowing the user to use both hands in handling the surface gap detector.
The light source in the surface gap detector may also provide private label branding opportunities for the supplier of the surface gap detector. In an example the light source may generate a certain color to match the private label brand. The apparatus may also be manufactured in various sizes and shapes, depending on the intended use or target industry.
Referring to FIG. 1 a side view of a self-illuminated embodiment of the surface gap detector, the surface gap detector 100 may comprise an elongated light dispersing member having a substantially flat surface 102 for projecting the dispersed light to facilitate determining the flatness of an object that is placed against a gap detecting edge 118 of the surface gap detector 100. In one embodiment, the surface gap detector 100 comprises a gap detecting edge 118 that is shaped like a straight edge. In some embodiments, the length of the apparatus is twelve (12) inches.
In another embodiment, a surface gap detector 100 may comprise a light source illuminating an elongated light dispersing material 102, where the light dispersing material 102 has at least one substantially flat surface for projecting the dispersed light. In addition, the surface gap detector 100 further may comprise a structural support plate 104 that supports the light source, the light dispersing material 102, and communicates with the gap detecting edge 118. In embodiments, the gap detecting edge 118 may be a lower extended edge of the support plate 104.
In one embodiment, the structural support plate 104 is made of metal, such as steel, tin, aluminum, magnesium, titanium, or composite metal material. The metal body may be formed through any number of processes, including, but not limited to stamping, extruding, forming, and machining. In some embodiments, the support plate 104 may include a mechanism for facilitating storage of the surface gap detector 100. In certain embodiments, the mechanism for storing may be a hook-hole 108 for hanging the surface gap detector 100 on a hook, peg, nail, and the like.
In other embodiments, the elongated light dispersing material 102 produces substantially uniform dispersed light 110. In certain embodiments, the elongated light dispersing material 102 may be one or more of an acrylic material, a polyurethane material, a polystyrene material, a polycarbonate material, glass, fiber optics, Plexiglas, or some other light dispersing material. In another embodiment, the elongated light dispersing material 102 may have a beveled edge to facilitate allowing the user to keep the substantially flat surface of the surface gap detector 100 on an object placed against the surface gap detector 100 as the user moves the surface gap detector 100 along a surface of the object. A beveled edge may also facilitate allowing the user to keep the substantially flat surface of the surface gap detector 100 on an object placed against the surface gap detector 100 as the user moves the object along a substantially flat surface of the surface gap detector 100. In some embodiments, the elongated light dispersing material 102 may be screwed into the support plate 104, but not in a way that restricts or impacts the diffusion of light. In other embodiments, the assembly of the apparatus may be accomplished by one or more of snapping the pieces together; bonding the pieces using one or more of glue, heat stake, or ultrasonic bonding; screwing the pieces together; forming the support plate 104 around the elongated light dispersing material 102; or some other process.
In one embodiment, the surface gap detector 100 does not include an elongated light dispersing material as herein described. In embodiments, such as embodiments without the light dispersing material, the surface gap detector 100 may include a gap detecting edge 118 as herein described that may be an extended edge of the support plate 104. In some embodiments, the substantially uniform dispersed light 110 may be diffused by a small slit in a diffusing slit plate disposed between the light source and the gap detecting edge 118. In embodiments, the light may not be directly emitted through the slit and, instead, may shine away from the diffusing slit plate and at a reflective surface that reflects the light toward the diffusing slit plate.
In some embodiments, the apparatus includes a switch 114 for activating the light source. In some embodiments, the elongated light dispersing material 102 may include a brand 112. In some other embodiments, the brand 112 may be a company logo, a trade name, a trademark, an image, or some other type of branding. The brand 112 may be placed in or on the elongated light dispersing material 102 by a process, including, but not limited etching, burning, printing, pressing, scratching, painting or some other process.
Referring now to FIG. 2, a plan-view of a side of the surface gap detector that is opposite that depicted in FIG. 1, in one embodiment, the surface gap detector 100 may include a brand 202 on the support plate 104. In some embodiments, the brand 202 may be a company logo, a trade name, a trademark, an image, or some other type of branding. The brand 202 may be placed in or on the support plate 104 by a process, including, but not limited etching, burning, printing, pressing, scrawling, painting or some other process.
Referring now to FIG. 3, depicting the surface gap detector placed upon a concave object, the flatness of a surface of an object 302 that is placed against a gap detecting edge 118 of the surface gap detector can be determined by observing the amount of light that reflects off of the object surface and is visible in an open space (e.g. a gap) between the object surface and the gap detecting surface 118.
Referring to FIG. 4, an end-view of the surface gap detector, a narrow projecting edge may be used as the gap detecting edge 118. The gap detecting edge 118 may be a terminal end of the support bracket 104 and may extend slightly below the light emitting surface 102 of the light dispersing member. Alternatively, the gap detecting edge 118 may be an adapted light emitting surface 402 that facilitates gap detecting. In this embodiment, the light diffusing member may have opaque near and far sides with only the emitting surface 402 being translucent to allow light to emit from this surface.
To facilitate using the gap detecting edge 118 or the adapted emitting surface 402 as the end that is placed against the surface to be checked, the gap detecting edge 118 and/or the adapted emitting surface 402 may be angled, curved, may include a near side rounded corner and a far side sharp corner, and the like. In some other embodiments, the narrow projecting edge 118 or 402 may have a rounded far corner and a sharp near corner as described herein, where the rounded far corner may help prevent the seepage of dispersed light and the sharp near corner may help maintain the substantially flat surface. By creating what may essentially be similar to a knife edge along the sharp near corner, the relative angle of tilt between the surface being checked and the surface gap detector 100 can be substantially widened. This facilitates keeping the surface gap detector 100 in contact with the surface to be checked, without requiring a ninety-degree angle between the surface gap detector 100 and the surface to be checked. This improves ease and quickness of use.
Referring to FIG. 5, an exploded view of an exemplary embodiment of a power source for the surface gap detector light, the surface gap detector 100 may include a power source. In one embodiment, the power source may comprise one or more batteries 502A-502D. In some embodiments, the housing for the power source 504 may comprise a tube for holding batteries. The power source housing 504 may also be used as a handle or anchor for a portion of the users' palm.
Referring now to FIG. 6, an exploded view of the assembly the surface gap detector of FIG. 4, the light producing element 602 is an LED. In an embodiment, there may be twenty-three LEDs, where the apparatus is twelve (12) inches. As used herein for purposes of the present disclosure, the term “LED” should be understood to include any light emitting diode or other type of carrier injection/junction-based system that is capable of generating radiation in response to an electric signal. Thus, the term LED includes, but is not limited to, various semiconductor-based structures that emit light in response to current, light emitting polymers, light-emitting strips, electro-luminescent strips, and the like.
In particular, the term LED refers to light emitting diodes of all types (including semi-conductor and organic light emitting diodes) that may be configured to generate radiation in one or more of the infrared spectrum, ultraviolet spectrum, and various portions of the visible spectrum (generally including radiation wavelengths from approximately 400 nanometers to approximately 700 nanometers). Some examples of LEDs include, but are not limited to, various types of infrared LEDs, ultraviolet LEDs, red LEDs, blue LEDs, green LEDs, yellow LEDs, amber LEDs, orange LEDs, and white LEDs (discussed further below). It also should be appreciated that LEDs may be configured to generate radiation having various bandwidths for a given spectrum (e.g., narrow bandwidth, broad bandwidth).
For example, one implementation of an LED configured to generate essentially white light (e.g., a white LED) may include a number of dies which respectively emit different spectrums of luminescence that, in combination, mix to form essentially white light. In another implementation, a white light LED may be associated with a phosphor material that converts luminescence having a first spectrum to a different second spectrum. In one example of this implementation, luminescence having a relatively short wavelength and narrow bandwidth spectrum “pumps” the phosphor material, which in turn radiates longer wavelength radiation having a somewhat broader spectrum.
It should also be understood that the term LED does not limit the physical and/or electrical package type of an LED. For example, as discussed above, an LED may refer to a single light emitting device having multiple dies that are configured to respectively emit different spectrums of radiation (e.g., that may or may not be individually controllable). Also, an LED may be associated with a phosphor that is considered as an integral part of the LED (e.g., some types of white LEDs). In general, the term LED may refer to packaged LEDs, non-packaged LEDs, surface mount LEDs, chip-on-board LEDs, radial package LEDs, power package LEDs, LEDs including some type of encasement and/or optical element (e.g., a diffusing lens), etc.
The term “light source” should be understood to refer to any one or more of a variety of radiation sources, including, but not limited to, LED-based sources as defined above, incandescent sources (e.g., filament lamps, halogen lamps), fluorescent sources, phosphorescent sources, high-intensity discharge sources (e.g., sodium vapor, mercury vapor, and metal halide lamps), lasers, other types of luminescent sources, electro-luminescent sources, pyro-luminescent sources (e.g., flames), candle-luminescent sources (e.g., gas mantles, carbon arc radiation sources), photo-luminescent sources (e.g., gaseous discharge sources), cathode luminescent sources using electronic satiation, galvano-luminescent sources, crystallo-luminescent sources, kine-luminescent sources, thermo-luminescent sources, triboluminescent sources, sonoluminescent sources, radioluminescent sources, and luminescent polymers. In some embodiments, the light producing element 602 is recessed in the support plate 104, where the recess may form an inverted “L”.
In another embodiment, the elongated light dispersing material 102 may be locked into the structural support plate 104 by a locking assembly 610. In other embodiments, light producing elements 602 can snap into the dispersing material 102. In some other embodiments, light producing elements 602 may be snapped into a “bulkhead” opening in the support plate 104. In some embodiments, the light source is connected to a power supply 502 by one or more PCB boards 608 and resistors 604. In another embodiment, some or all of the power supply 502, the switch 114, and the light producing elements 602 may be wired together. In yet another embodiment, the some or all of the power supply 502, the switch 114, and the light producing elements 602 may be assembled to a printed circuit board 608.
In an alternative embodiment, the surface gap detector 100 may be shaped to fit a specific pre-determined angle or curve. For example, the apparatus may be shaped to determine that objects placed against the apparatus's gap detection edge 118 make a right angle. In addition, the surface gap detector 100 may be manufactured to determine whether certain curved objects, for example, bells, placed against the gap detecting edge 118 of the surface gap detector 100 without gaps. In other embodiments, the surface gap detector 100 may be used to detect the lack of certain required features in a surface. For example, the surface gap detector 100 may be used to detect if the surface has an incomplete saw tooth pattern.
In another embodiment, the invention may be used in conjunction with a photo detecting device, where the photo detecting device may be used to automate the detection of object surfaces that do not conform to a shape represented by the gap detecting edge 118 of the surface gap detector 100. For example, the photo detecting device may be used to check skis after a grinding process. In this example, the skis may be placed against the surface gap detector 100 and any light that illuminates gaps in the surface may be detected by the photo detector. If the photo detecting device detects light over a certain threshold, it could determine that the ski is not flat and must go through the grinding process again.
In other alternative embodiments, the apparatus may include other features. In one embodiment, the surface gap detector 100 may include distance markings similar to the markings on a ruler. The distance markings may be used for a variety of purposes, including, but not limited to measuring distances on an object or determining a location of a detected defect or gap in the surface of an object. In certain embodiments, the distance markings may be etched into a surface of the surface gap detector 100. In another embodiment, the distance markings may be painted onto a surface of the surface gap detector 100. In still another embodiment, the distance markings may be on another object, such as a tape that is attached to the surface gap detector 100 by for example. In another embodiment, the surface gap detector 100 may include one or more bubble levels that may be used to determine whether the detector 100 is horizontal.
In another alternate embodiment, the light diffusing member 102 may be shaped so that the light source, such as a bank of LEDs may be projecting light into a top edge of the member, but offset horizontally from the light emitting edge. By being offset, the LEDs would direct most of their light toward a reflective surface of the light diffusing member that would reflect the light into the diffusing member so that the light eventually projected from a projecting surface of the light diffusing member 102, without the LEDS causing a non-uniform projection of light.
LED Lighted Level Vial
In embodiments, the present invention provides a lighted level vial. Referring to FIG. 7, a perspective view of a level vial 700 connected directly to a light source 702 is depicted. The level vial 700 may include a housing 704, an acrylic tube 710 holding a liquid, and a light source 702 coupled to the acrylic tube 710. The light source 702 may enable a user to see clearly in dark areas. The acrylic tube 710 may be provided with a pair of plugs (not shown) at both the ends of the acrylic tube 710. The light source 702 may be provided in combination with one of the plugs that may illuminate the level vial 700 thus making an air bubble inside the liquid of the level vial 700 readily observable when lighting conditions are poor. The light source 702 may also illuminate surfaces in close proximity of the level vial 700. Further, the light source 702 may be a light emitting diode (LED), incandescent sources such as filament lamps, halogen lamps, and the like. In an embodiment, the light source 702 may be directly connected to the level vial 700.
The light source 702 may be included inside a housing 704. In an embodiment, the housing 704 of the level vial 700 may be rectangular in shape. The housing 704 may be composed of metal, plastic, and the like, which may enclose the level vial 700 and may offer protection to the level vial 700 against breakage. The housing 704 may be provided with an opening (not shown) for observation of an air bubble inside the liquid. Further, the light source 702 may be capable of emitting one or more of green illumination, red illumination, white illumination, and blue illumination. The light source 702 may be connected to a power source 708 to illuminate the liquid inside the acrylic tube 710 of the level vial 700. The power source 708 may include one or more batteries. Wires that may connect the light source 702 with the power source 108 may be located inside the housing 704.
In addition, the housing 704 may be configured with a toggle or push button switch for activating the light source 702 and illuminating the level vial 700. The light source 702 may thus enable users to check if a surface is leveled or not. In an instance, the level may include more than one vial. In such instances, the level may include a housing (not shown) for the light source 702 such as LED. Further, the housing may contain multiple LEDs to light the more than one vial of the level. For example, the housing may include three LEDs to illuminate both ends of the level vial 700. In an embodiment, the light source 702 may be provided at both ends of the housing 704 of the level vial 700. In an embodiment, the LEDs connected to the acrylic tube 710 may be visible from top and may be covered by side caps that prevents light from being exposed to the user. Further, the light source 702 may be provided outside the housing 704 of the level vial 700.
Referring to FIG. 8, a perspective view 800 of the light source 702 connected to the level vial 700 through a fiber optic tube 802 to the level vial 700 is depicted. The light source 702 may further be connected to a power source 708 such as batteries. The fiber optic tube 802 directs the light from the power source 708 to the level vial 700 for illuminating the acrylic tube 710. Accordingly, the air bubble inside the liquid of the acrylic tube 710 may be illuminated. This may indicate location of the air bubble to the user in dim light or dark areas. In an example, the fiber optic tube 802 may be forked off to use the light source 802 into multiple fiber optic tubes. In the present example, the fiber optic tube 802 may be forked off by using a coupling, a Y joint, and the like. In another embodiment, the light source 702 may be provided at both ends of the housing 704 of the level vial 700.
The level vial 700 described in conjunction with FIGS. 7 and 8 may be used for determining the level of a horizontal surface. In an embodiment, the level vial 700 may be used for determining level of vertical surfaces. In such cases, the level vial 700 may include the housing 704, the acrylic tube 710 holding a liquid, and the light source 702 coupled to the acrylic tube 710. Further, the housing 704 may be round in shape.
Back Light Level Vial
In another embodiment, a light source of a level vial may illuminate the background of the level vial for enhancing visibility in low lighting conditions. Referring to FIG. 9, a perspective view 900 of a level vial 902 highlighted due to back lighting is depicted. The level vial 902 may include an acrylic light diffuser (not shown) having a sheet of acrylic 904. In an embodiment, the acrylic sheet 904 may be altered such as scratched at surfaces thereby allowing a light source to highlight the surfaces of the acrylic sheet 904. In another embodiment, the light source may illuminate the acrylic sheet 904 without being altered. In this case, the light from the light source may be less intense.
In an embodiment, the light source may include light emitting diode (LED), incandescent sources such as filament lamps, halogen lamps, and the like. The light source may be connected to a power source such as a battery, a power cord, and the like. For example, the level vial 902 may be used in a machine to level the foundations of the machine. The level vial 902 in this case may be illuminated to highlight a surface and may therefore use a power cord to connect the level vial 902 to the power source. It may be noted that the primary function of the light source is to illuminate the level vial 902. However, a person skilled in the art may also find other use of the light source.
Again referring to FIG. 9, the light source may be fixed in a way that the light source may point out and away from the level vial 902. This may enable the light source to illuminate the acrylic sheet 904 and may brighten up the background of the level vial 902. Further, the light source while pointing out reduces the risk of hurting a user's eyes while looking at the level vial 902. The illumination of the acrylic sheet 904 in the background of the level vial 902 may in turn highlight a front portion of the level vial 902.
In an embodiment, the LEDs may be of different colors such as red, green, yellow, and the like. In another embodiment, the liquid inside an acrylic tube may be colored, to produce colored light. In yet another embodiment, the acrylic sheet 904 may be of different colors. In embodiments, the acrylic sheet 904 may be a transparent sheet, an opaque sheet, and the like. Further, the level vial 902 may be configured with a toggle or push button switch for activating the light source and illuminating the acrylic sheet 904. Further, the light source for illuminating the acrylic sheet 904 may also be used in conjunction with side leveling vials, vertical leveling vials, and the like.
Referring to FIG. 10, a perspective view 1000 of a side vial 1002 of the level vial 902 is depicted. In an embodiment, the side vial 1002 may also include a light source.
FIG. 11 depicts a perspective view 1100 of the level vial 902 highlighted due to back lighting. The back lighting may illuminate liquid 1102 inside the level vial 902.
FIG. 12 depicts a perspective view 1200 of illumination of the acrylic sheet 904 of the level vial 902, in accordance with an embodiment of the present invention.
Pipe Level
In embodiments, the present invention provides a device for determining levelness of industrial materials with stability and accuracy. The device of the present invention may sit securely on cylindrical surfaces as well as flat surfaces. In addition, the device may include a light source to enable a user to see clearly in poor light conditions.
Referring to FIG. 13, a perspective view 1300 of a device 1302 fixed on a pipe is depicted. The device 1302 may include a pipe joint relief 1304, a plurality of vials such as a center vial 1308, a side vial 1310, a switch 1312, and an angled side vial 1314. The pipe joint relief 1304 may enable the user to see if the device 1302 is fixed properly on a surface or not. For example, if the device 1302 is placed on a cylindrical surface such as a pipe, the pipe joint relief 1304 may act as a window and may enable the user to see if the device 1302 is sitting properly over the surface or not. In an example, the device 1302 may be used to level plumbing pipes. The device 1302 may be placed at the highest point of the plumbing pipes, the pipe joint relief 1304 may act as a window to enable the user to balance the device 1302 over the plumbing pipes. Plumbing pipes often include in-line joints that have a greater diameter than the joined pipes. The pipe joint relief 1304 may be placed over the in-line joint thereby allowing the level to contact the pipe on either side of the in-line joint.
Further, the center vial 1308 may be illuminated by means of a light source (not shown). The light source may be a light emitting diode (LED), incandescent sources such as filament lamps, halogen lamps, and the like. In an embodiment, the light source may be located inside the central vial 1308. Alternatively, the light source may be connected to the central vial 1308 using fiber optic tubes. The illumination of a device such as the device 1302 using a light source has been described above and therefore is not explained herein for the sake of brevity. In another embodiment, the center vial 1308 may include a back panel (not shown) for illuminating the surfaces in proximity to the device 1302. The back panel may include an acrylic sheet that may be illuminated to highlight the device 1302. It may be noted that the back lighting of a device such as the device 1302 using the acrylic sheet has been described above and therefore is not explained here for the sake of brevity. In an example, the center vial 1308 may include two back panels to illuminate a top and a front portion of the device 1302. In an embodiment, the back panels may be configured to diffuse blue colored light. It will be evident to a person skilled in the art that the back panels may be configured to diffuse any color of light.
In an embodiment, the side vial 1310 may also be provided with a back panel. The back panel may include a light source (not shown) such as a light emitting diode (LED), incandescent sources such as filament lamps, halogen lamps, and the like. In another embodiment, the device 1302 may include acrylic light diffuser that may have an acrylic sheet. The illumination of the device 1302 using LEDs and the acrylic light diffuser has been explained above and therefore is not explained here for the sake of brevity. The side vial 1310 may be used for determining the vertical level of a surface, thus providing more accurate leveling measurements.
In embodiments, the device 1302 may include a switch 1312 for activating the light source and illuminating the acrylic sheet. In an alternate embodiment, the device 1302 may include sensors (not shown) that may activate the light source. For example, the sensors may be disposed on the center vial 1308 and the side vial 1310. The sensors may determine change in the light conditions and may activate the light source automatically. In another example, the sensors may detect the touch of a hand and may activate the light source after a preset time. It will be evident to a person skilled in the art that the light source may be activated by any other automatic system.
Further, the angled side vial 1314 of the device 1302 may be used to determine any inclination in a surface. In an example, the angled side vial 1314 is placed at an angle of 45 degrees. In an embodiment, the angled side vial 1314 may be adjusted at any suitable angle as per the requirement of the user.
Referring to FIG. 14, a perspective view 1400 of the device 1302 illuminated due to the light source is depicted. The beam of light 1402 may be shining through the pipe joint relief 1304 as the device 1302 may be resting on a curved surface.
Now referring to FIG. 15, a perspective view 1500 of the device 1302 placed over a surface 1502 is depicted. The surface 1502 may include a split 1504 that may prevent the user from taking an overall level reading of the level of the surface 1502. The user may in such cases, place the device 1302 in such a way that the pipe joint relief 1304 may cover the split 1504 and may thus enable the user to take leveling measurements. In another example, the surface 1502 may be uneven and may include a bump, a protrusion, and the like. The device 1302 may be placed in such a manner that the pipe joint relief 1304 fits over the protrusion and thus maintains contact with the surface. In embodiments, the device 1302 may include a pair of support legs to grip the surface that needs to be leveled.
Further, referring to FIG. 16, a perspective view 1600, illustrating the various surfaces of the device 1302, are depicted. The device 1302 may include a pair of support legs 1602 that may enable the user to fix the device 1302 on any surface. The device 1302 may also include bumpers 1604 disposed near the longitudinal edges of the device 1302. The bumpers 1604 may absorb any impact of shock that may be created while using the device 1302. In an embodiment, the bumpers 1604 may be made up of a rubber material. Further, a base portion 1608 of the device 1602 may have a radius bottom shape. The radius bottom shape of the base portion 1608 may enable the user to fix the device 1302 over any size or radius of a tube, a pipe, and the like. In an embodiment, the device 1302 may include a top portion. The top portion may be provided with Computer Numerically Controlled (CNC) finishing that may assure accuracy of the measurements taken by the device 1302.
In embodiments, as mentioned herein, the device 1302 may be placed over any type of surface such as curved surface, flat surface, and the like. The curved surfaces may include tubings, pipes, and the like. Further, the device 1302 may be placed over all types and sizes of pipes and tubes. In an example, if the tube has large radius, the pair of support legs 1602 of the device 1302 may be fixed on an outer edge of the tube. In another example, if the tube has a small radius, the radius bottom shape of the base portion 1608 of the device 1302 may come in contact with the tube and hold the tube for level determination.
In embodiments, the light source may be configured with the pipe joint relief 1304. The light source may highlight an area of contact between the tube and the device 1302. In a scenario, the pipe joint relief 1304 may be used to cover any obstacle such as a split, a bend, and the like in a tube. The light source integrated in the pipe joint relief 1304 may highlight such obstacles and may facilitate using the device 1302 to take correct level measurements.
In an embodiment, the device 1302 may be a digital device. Further, the device 1302 may include a stud finder (not shown) that may be magnetic to detect the presence of a ferrous metal object, such as head of a nail or screw, in a wall, and the like to enhance the utility of the device 1302. It will be evident to a person skilled in the art that the stud finder as discussed above may also use an internal capacitor, radar, and the like, to detect the studs. In another embodiment, a laser device (not shown) may be integrated with the device 1302. The laser may display an accurately horizontal or vertical illuminated line on a surface on which the device 1302 is placed.
While the invention has been disclosed in connection with the preferred embodiments shown and described in detail, various modifications and improvements thereon will become readily apparent to those skilled in the art. Accordingly, the spirit and scope of the present invention is not to be limited by the foregoing examples, but is to be understood in the broadest sense allowable by law.
All documents referenced herein are hereby incorporated by reference.

## Claims

1. A device for determining level of a surface, the device comprising:
a plurality of level vials configured to indicate orientation of the device, the plurality of level vials disposed at distinct locations on the device;
a radius bottom formed in an object contact surface at substantially the latitudinal center of the contact surface and extending longitudinally the length of the surface;
a joint recess disposed centrally along the longitudinal axis of the device and extending latitudinally across the device; and
one or more user controllable light sources coupled to the plurality of level vials for illuminating the level vials.

2. The device of claim 1, wherein at least one of the level vials of the plurality of level vials is configured to determine level of a substantially horizontal surface.

3. The device of claim 1, wherein at least one of the level vials of the plurality of level vials is configured to determine level of a substantially vertical surface.

4. The device of claim 1, wherein at least one of the level vials of the plurality of level vials is configured to determine level of a surface substantially angled to the horizontal and the vertical surface.

5. The device of claim 1, wherein the joint recess is facilitates viewing an orientation of the device to a surface.

6. The device of claim 1, wherein the joint recess facilitates spanning a non-uniform portions of the surface.

7. The device of claim 1, wherein the light source is selected from one of a light emitting diode, a halogen lamp, and a fluorescent lamp.

8. The device of claim 1, wherein the light source is an acrylic light diffuser.

9. The device of claim 1 further comprising a switch configured to activate the light source.

10. The device of claim 1 further comprising a plurality of sensors for controlling operation of the light source.

11. The device of claim 1 further comprising bumpers configured to absorb impact of shocks on the surface.

12. The device of claim 1, wherein the device is a digital device configured to take measurements digitally.

13. The device of claim 1 further comprising a stud finder.

14. The device of claim 1, further including a pair of support legs extending outward from the radius bottom, the pair of support legs facilitating a user to fix the device over a large-radius curved surface.