Abstract: The present invention regards methods of projecting, producing and bending continuous stretches of circular cylindrical bodies, such as stretches of piping, handrails and rails for stair lifts. The invention also regards a tool for use with the method, application of a tool, and a length of pipe and fittings prepared for use with the method. During the project planning, the orientation of the fitting (52) is given in relation to the first piece of pipe (50), by the cut angle of the fitting (52) and the rotational angle (?) of the fitting about the longitudinal axis of the pipe (50) relative to a defined spatial direction gen by a mark (53, 54) on the piece of pipe (50) and the fitting (52). During construction, the piece of pipe (50) is arranged with one side in a defined spatial direction, the fitting (52), which has a given cut angle, is fitted to the piece of pipe (50) and the fitting (52) is rotated through a pre-determined rotational angle (?) that is measured relative to the defined spatial direction.

Abstract: A square that includes two rigid, channeled members having an interior and an exterior, with the two members being joined at a ninety-degree angle to form a one-piece L-shaped tool having an elbow and a notch disposed on an exterior corner opposite the elbow. The invention also features a bubble level attached to the exterior of each member and a releasable adhesive member disposed upon the interior of each member, such as magnets, tapes, or adhesive plastic materials. Methods for pipe-fitting and for holding pipes or joints in place with the invention are also provided.

Abstract: A slope measurement instrument consistent with certain embodiments has a magnetic base with a compartment attached to the magnetic base, the compartment having an inner face and a clear outer face, with the inner face having indicia of angular graduations thereon, the indicia being viewable through the outer face. The angular graduations are arranged in a semi-circular pattern with a zero grade position at the bottom and increasing angles indicated on either side of the bottom. An indicator needle is pivotally suspended so that gravitational forces acting on the needle cause the needle to point to the zero grade position when the instrument is positioned at a zero degree grade. A fluid disposed within the compartment between the inner face and the outer face to stabilize movement of the needle. The volume of the fluid can be adjusted to adjust the amount of fluid stabilizing effect provided for various conditions.

Abstract: An inclinometer for measuring the angle between a reference angular position and an angularly adjustable surface, such as on the control surfaces of a model aircraft. In one form, the inclinometer has a beam and a pair of opposed arms attached to the beam with centering faces to attach the inclinometer to the leading and trailing edges of the adjustable surface. In another form, the inclinometer has opposed gripping faces to attach to opposite sides of the adjustable surface. A pair of accelerometers sense the earth's gravitational vector and supply output signals to a data processor. The data processor determines a first reference position and a second angular position of the adjustable surface to determine the angle of the adjustable surface. A display receives information from the data processor to display the angle. Related methods are also disclosed.

Abstract: A portable multiple-axis leveling device for removably attaching to selected objects includes a main body portion having a plurality of distinct alignment detection units disposed therein, with each alignment detection unit being configured to measure and display levelness along respective axes such that at least two distinct axes may be simultaneously measured for respective levelness without adjustment of the main body portion, and a clamping portion operably coupled to the main body portion, with the clamping portion having a recessed portion for receiving selected objects therein. The portable multiple-axis leveling device further includes a securement apparatus operably coupled to the clamping portion for removably securing the clamping portion to the respective selected object that is operably positioned in the recessed portion. The portable multiple-axis leveling device is preferably sufficiently portable to readily fit within a typical clothes pocket.

Abstract: A ganging tool for adjusting the position of a pair of ganged wiring devices such as duplex receptacles, toggle, and decorator type switches on a mounting, e.g., an electrical box. The ganging tool has a frame having a pair of apertures for receiving different kinds of wiring devices and holding them in place while the ganging tool adjusts the position of the wiring devices. The ganging tool also has rotatable toggle adaptors that allow the ganging tool to be used to position both toggle type wiring devices and non-toggle type wiring devices. The ganging tool further has a leveling means for determining the level of the wiring devices. Also, tool cutouts on the frame of the ganging tool allow the ganging tool to be used with power tools in conjunction with positioning and affixing wiring devices on a mounting.

Abstract: A method and apparatus for establishing and maintaining consistent spacing between parallel forms for concrete structures. The elongated spacer includes notches at either end for flush engagement with the upper corners of the parallel forms. An angled notch may be provided for engagement with angled toeboards used in curb construction, and a level may be included for use in setting the parallel forms at a consistent level.

Abstract: This invention describes an illuminated spirit level that can be used in an aircraft to determine aircraft attitude as well as aircraft direction. The invention essentially comprises three levels arranged in the shape of a cross with bubble vials in each of the left and right “wings” and a bubble vial in the forward section of the central level. The levels would have a battery-operated power source to keep the device illuminated in the event that the electrical controls of the plane malfunction. Additionally, the bubble vials would contain a glow-in-the-dark fluid in case of battery failure. The spirit level could be secured to the top of the dash or alternatively, could be mounted within the instrument control panel.

Abstract: A pipe fitting method and apparatus for taking simultaneous linear and angular measurements is used for pipefitting. A first pipe joint fitting of a pipe fitting apparatus herein disclosed is attached to a first pipe joint, a second pipe joint fitting of the pipe fitting apparatus is attached to a second pipe joint, and the first pipe joint is attached to a first unconnected end of a first pipe-to-be-joined. Then, the pipe fitting apparatus is extended to an extended length thereof, while an angle measuring device of the pipe fitting apparatus simultaneously maintains an angular reading at a preselected joinder angle, until a top open end of the second pipe joint aligns with a second pipe-to-be-joined at an alignment line. Next, it is determined where to cut the second pipe-to-be-joined with reference to the alignment line. Finally, it is determined how long to cut a third connecting pipe with reference to the extended length of the pipe fitting apparatus.

Abstract: A conduit bending guide, where in a preferred embodiment, the guide has a base a member with a first base section and a second base section with means for repositioning of the two base sections with respect to each other, a fastening member for securing of the guide to a conduit, a suspension mount housing an angle indicator, and a bend angle indicator. The angle indicator could have various degrees of freedom of rotation in space as it is supported by a suspension means of the suspension mount. The guide allows making of consecutive co-planar bends in a conduit by observation of the reading on the angle indicator. By observing the angle indicator, it is also possible to make consecutive out-of-plane bends with a desired angle of deviation from the plane established by any one bend in the conduit. The degree of a bend along the longitudinal axis of the conduit is measured by the bend angle indicator or by realignment of the angle indicator.

Abstract: A novel apparatus and method for use in measuring surface slope is disclosed. In a preferred embodiment, the measurement apparatus includes a fluid case having an arch of flat segments forming a sloped ceiling. In another preferred embodiment, a smooth curve, instead of a series of flat segments, is formed by reducing the length, and increasing the number, of the constant slope flat segments. And in a preferred embodiment, the apparatus provides a mechanism for compensating for any expansion or contraction of the fluid in the fluid case. A method for measuring the slope of a surface includes providing a measurement apparatus, placing the measurement apparatus adjacent the surface and reading an indicator corresponding to the slope of the surface.

Abstract: A level having a frame with a reference surface and a level sensor secured to the frame. The level includes one or more attachment devices that are detachably secured to the level. The one or more attachment devices may include a torpedo level, a second level sensor, a tape measure, a writing instrument, notepad, or other auxiliary device that may be used by a user of the level.

Abstract: A device for leveling a plug receiving receptacle in an electric outlet box is disclosed which comprises a surface having spaced apart opposing male bar prongs arranged along generally parallel axes extending about perpendicular from the surface, arranged to insert into corresponding female bar slots of an electric plug receiver and level means, arranged to indicate horizontal and vertical level of an axis perpendicularly intersecting the parallel bar prong axes.

Abstract: A pipe fitting method and apparatus for taking simultaneous linear and angular measurements is used for pipefitting. A first pipe joint fitting of a pipe fitting apparatus herein disclosed is attached to a first pipe joint, a second pipe joint fitting of the pipe fitting apparatus is attached to a second pipe joint, and the first pipe joint is attached to a first unconnected end of a first pipe-to-be-joined. Then, the pipe fitting apparatus is extended to an extended length thereof, while an angle measuring device of the pipe fitting apparatus simultaneously maintains an angular reading at a preselected joinder angle, until a top open end of the second pipe joint aligns with a second pipe-to-be-joined at an alignment line. Next, it is determined where to cut the second pipe-to-be-joined with reference to the alignment line. Finally, it is determined how long to cut a third connecting pipe with reference to the extended length of the pipe fitting apparatus.

Abstract: A level apparatus is provided with an elongate level and a support. The level and the support each have opposed ends, front and rear faces and top and bottom faces. The top and bottom faces of the support are substantially planar and parallel to one another, and the top and bottom faces of the level are substantially planar and parallel to one another. A central position on the support is pivotally connected to the level such that the rear face of the support is in opposed facing relationship to the front face of the level. The level can be used in a conventional manner without utilizing the support. However, the support can be pivoted relative to the level into an orientation where the top or bottom face of the support can be positioned on the upper face of a beam such that the level extends downwardly from the support and the beam. The level then can be used to define a plumb line to which other structural elements can be positioned or compared.

Abstract: A device for measuring the angle of orientation with respect to a known frame of reference between a first object having a first axis and a second remote destination comprises a first arm member defining a first longitudinal axis and an object engaging surface substantially parallel to the first longitudinal axis for engaging a first object. A second arm member is connected in pivotal relation to the first arm member at a primary joint for pivotal movement about a first transverse pivot axis intersecting the first longitudinal axis and defining a second longitudinal axis intersecting the first longitudinal axis and the first transverse pivot axis. A laser is mounted on the second arm member for projecting a laser beam along a laser beam axis parallel to the second longitudinal axis. A first angle measurer is mounted on the second arm member to measure and indicate the angle of the second longitudinal axis with respect to a fixed reference frame other than the first longitudinal axis.

Abstract: A laser tool is designed to indicate and align measurements, preferably holes to be drilled for hangers that support plumbing and electrical piping, without the need for the use of a tape measure. The laser tool contains an angled base with magnets that allow the tool to remain steady on a pipe. Also included in the base is a bubble level, indicating and allowing the user to balance the tool in relation to the pipe. The laser of the tool is connected to the base by means of a swivel device, so that the user is capable of moving the laser at an angle to obtain additional measurements that are level and aligned with the original measurement for a hole.

Abstract: An electronic level (10) has a rigid flat disk (12). An electronic level sensor (14) is attached to the rigid flat disk (12). An electronic display (20) is electrically connected to the electronic level sensor (14).

Abstract: A picture hanger with a height adjustable hook allows the height of the picture to be adjusted from time to time. The hanger uses a back plate on which two opposed crenelated tracks are positioned. Two spring biased crenelated cars are housed in a frame and move on the tracks. The hook is attached to the frame. The frame is either a traveling plate which moves between the tracks and the back plate or a traveling block which is slidably mounted in a channel in the back plate and on a rod positioned in the channel of the back plate.

Abstract: A method and apparatus for use in aligning automotive wheels. The apparatus includes a body having a first end and a second end, and including an aperture at the first end arranged to receive a wheel assembly lug; an adjustable camber liquid level arranged longitudinally within the body; and, a horizontal liquid level arranged perpendicularly to the adjustable camber liquid level. The method includes the steps of measuring camber of an automotive wheel with the tool of the invention affixed to a single lug of the wheel assembly, where the tool comprises a liquid level having a horizontal liquid level and a camber liquid level, and the measuring consists of zeroing the horizontal liquid level and the camber liquid level prior to making a repair of the vehicle; removing the tool from the single lug; performing the repair of the vehicle; re-affixing the tool to the single lug; and, adjusting the camber of the wheel assembly such that the horizontal liquid level and the camber liquid level are re-zeroed.

Abstract: A trim installation tool includes a base with first and second ends, inner and outer faces, and opposite side edges. First and second clamp assemblies are mounted on the base in proximity to its first and second ends respectively. The clamp assemblies have engaged and disengaged positions for respectively clamping and releasing a wall edge adjacent to the wall opening. An elongated level with an orientation-display device is mounted on the base inner face and extends generally between the ends thereof. The orientation-display device indicates a level or plumb orientation of a trim piece clamped in position by the tool for attachment to the frame members surrounding the wall opening.

Abstract: A level apparatus is provided with an elongate level and a support. The level and the support each have opposed ends, front and rear faces and top and bottom faces. The top and bottom faces of the support are substantially planar and parallel to one another, and the top and bottom faces of the level are substantially planar and parallel to one another. A central position on the support is pivotally connected to the level such that the rear face of the support is in opposed facing relationship to the front face of the level. The level can be used in a conventional manner without utilizing the support. However, the support can be pivoted relative to the level into an orientation where the top or bottom face of the support can be positioned on the upper face of a beam such that the level extends downwardly from the support and the beam. The level then can be used to define a plumb line to which other structural elements can be positioned or compared.

Abstract: A level apparatus is provided with an elongate level and a support. The level and the support each have opposed ends, front and rear faces and top and bottom faces. The top and bottom faces of the support are substantially planar and parallel to one another, and the top and bottom faces of the level are substantially planar and parallel to one another. A central position on the support is pivotally connected to the level such that the rear face of the support is in opposed facing relationship to the front face of the level. The level can be used in a conventional manner without utilizing the support. However, the support can be pivoted relative to the level into an orientation where the top or bottom face of the support can be positioned on the upper face of a beam such that the level extends downwardly from the support and the beam. The level then can be used to define a plumb line to which other structural elements can be positioned or compared.

Abstract: A wall hanging level for assisting a user in determining whether a wall hanging is horizontally aligned properly on a vertical wall surface. The wall hanging level includes a case with an elongate slot extending along a lower edge of the case. A panel is slidably inserted into the elongate slot of the case. A front face of the panel has a bubble vial.

Abstract: A standoff is adapted for mechanical engagement along one side of a level sensing device such as a carpenter's level. The standoff provides a body for interlocking to the level's side by drawing an edge of the level into a V-notch in the standoff so that surfaces of the standoff and the level are forced into intimate contact, thereby aligning the two parts. The standoff provides a magnet and U-shaped magnet support for enabling the standoff to magnetically engage any iron bearing surface such as a steel construction stud or an iron or steel pipe. The U-shaped magnet support is configured for accepting a round surface so that the level sensing device may be used to detect level and plumb conditions on both flat as well as round surfaced objects.

Abstract: A 3D laser leveler is provided for accurately locating distant parallel or extension lines. The 3D laser leveler has a base block and a rotator. The base block provides a base plane for resting upon a flat surface when in use, a first leveling unit for examining the leveling status of the base plane, and a pivot mechanism. The rotator is rotatably connected to the base block and rotatable around the pivot mechanism, and includes a housing for providing an internal accommodating space, a battery set and a laser unit received inside the accommodating space. The laser unit uses power provided by the battery set for generating a spanning plane laser beam that can be utilized to locate a spatial extension or a perpendicular line. In addition, a joining bracket can be included separately to connect the 3D laser leveler and a conventional beam leveler.

Abstract: A device is provided for leveling a wall-mounted fixture such as a picture frame. The device has a mounting element, which can be fastened to a back surface of the fixture at a suitable location, such as a corner. A retractable level formed of multiple telescoping cylinders is mounted with the mounting element. The level is movable between a hidden position and a viewing position. In the hidden position the level is retracted into a recess in the mounting element so that the level is substantially hidden from an observer viewing the fixture. In the viewing position the level is extended outwardly from the mounting element for use in leveling the fixture.

Abstract: The present invention is directed to a sprinkler head leveling for ensuring that the longitudinal axis of a sprinkler head assembly is substantially vertically aligned. The sprinkler head leveler uses a hollow cylindrical base which slides over the sprinkler head bonnet and external casing after the sprinkler head is inserted in the ground. A bull's-eye level is mounted to the base and disposed above a top surface of the base to provide clearance from the attachment hardware and embossments on the top of the sprinkler head assembly. In this way, the leveling device can be used to vertically align the sprinkler head assembly without interference from the surface of the bonnet and the surrounding ground.

Abstract: A new level for determining whether surfaces are level and plumb. The inventive device includes an elongate main member and a elongate insertion member. The main member has first and second ends, and top and bottom faces. The top face of the main member has an hole therein. A first bubble vial is provided in the hole of the top face of the main member. The elongate insertion member has first and second ends, and top and bottom faces. The top face of the insertion member has an hole therein. A second bubble vial is provided in the hole of the top face of the insertion member. The second end of the insertion member is slidably received by the first end of the main member. The insertion member is biased away from the second end of the main member in a direction along the longitudinal axis of the main member.

Abstract: A vehicle steering wheel centering apparatus comprising an electronic or mechanical leveling device for sensing a deviation in the position of the steering wheel from a centered position and a housing mounted to the vehicle steering wheel for supporting the leveling means. A first arm received in the housing has, at its terminal end, a cam rotatable about a first axis. A second arm received in the housing and coaxial with said first arm has, at its terminal end, a cam rotatable about a second axis parallel to said first axis. In the alternative, the cams are fixed but include a sliding surface adapted to contact and slide along the inner surface of a steering wheel rim when inserted thereagainst. The spring biases the first arm so that the terminal end of the first arm is forced away from and in a coaxial direction with the second arm. The apparatus also preferably includes a second spring coupled to the second arm so that the first and second terminal ends are forced directly away from one another.

Abstract: A pendulum line level is presented which makes reading the level easier and which allows a workman to utilize a level that is calibrated in degrees. The level is essentially rectangular and has two rotating dials in the body of the level. These dials rotate freely about a pivot point. Each disc has a pair of horizontal and vertical, perpendicular pointers which are used to determine when the level is in horizontal alignment with the ground. A calibrated scale located just outside the upper left quadrant of the left disc and just outside the lower right quadrant of the right disc allows the workman to read discreet angles of orientation. A second embodiment of the device has a gate with another pair of dials which swings perpendicular to the main body of the pendulum level. This second set of perpendicular dials allows the workman to determine when the main body of the level is in a vertical plane and to determine at which angle the main body of the level may be oriented.

Abstract: The tool of this invention comprises a collar which may be attached to a pivot rod extending from the underside of the upper pivot assembly of a swinging or revolving door, the collar having a recess in the top surface of the collar for receiving the upper pivot rod, said recess being dimensioned to snugly fit the pivot rod without substantial lateral movement of the collar, so as to align the central vertical axes of the collar and upper pivot rod, the bottom of the recess having a central aperture, a means for rigidly but removably attaching the collar to the pivot rod, and means associated with the collar for generating a marker in vertical alignment with the central aperture in the bottom of the recess to thereby designate the center point of the bottom pivot.

Abstract: The present invention is a receptacle level that simulates a male electrical plug and also contains a liquid bubble level such that when the device is plugged into an electrical wall outlet, proper orientation of the wall outlet can be obtained by reading the bubble level. The receptacle level includes tapered male plugs and fits within coverplate clearances as are typically used with the electrical wall outlet to be leveled. This device simplifies the leveling of electrical wall outlets during installation.

Abstract: A right angle level holder includes a right angle level base, and a plurality of thumb screws. The right angle level base has two legs which are disposed 90 degrees apart from one another. Each leg has a slot which receives a straight level. A first side of the slot has an inverted acute angle surface which is structured to retain a first edge of a straight level. The second side of the slot has a raised portion which is high enough for tapping a threaded hole. The thumb screw is threaded in the threaded hole to retain a second edge of a straight level. The thumb screw has a first end which is adapted for turning by finger pressure. The second end of the thumb screw has a swivel tip that is adapted for retaining the second edge of a straight level.

Abstract: A ladder inclination indicator has a transparent thin-walled body shell defining a rearwardly open recess containing a pivot pin supporting a gravity actuated pointer. A keeper plate forms a partial closure for the recess and carries a label which cooperates with the pointer to indicate a position of ladder inclination. Layers of pressure sensitive adhesive adhered to mounting flanges on the body shell secure the device to the side rail of a ladder.

Abstract: A method for measuring the wheel inclination or "camber" of a vehicle. In a wheel assembly, e.g. in the front axle and suspension assembly of the vehicle, the wheel planes are somewhat inclined in relation to a plane perpendicular to the floor or base, the inclination representing the so called camber angle. A simple method is proposed for determining the magnitude of the angle, independent of specific operating sites and sophisticated instruments. In a manner known per se, a wheel subject to camber measurement is provided with an axial extension in the form of a pin exactly coaxial with the wheel. The center line of said pin will thus incline in relation to the floor by an angle which equals the camber angle. On the floor, directly in front of the set of wheels, a rod or a like straight member is placed. An instrument provided with two mutually perpendicular levels is placed on the rod.

Abstract: A hands free square and level which includes a self holding square that has central channels formed by opposing inner and outer walls. The central channels include mounting holes in its outer wall to allow it to be mounted on a work piece via screws. An inner wall, opposing the outer wall, has corresponding screw driver apertures to allow access to the screws by a screwdriver. The central channel also has transverse bolt apertures which allow the square to be face mounted on a work surface by inserting a bolt through a transverse bolt aperture and then into a work surface. A separate detachable level is sized to slidably fit within a central channel. Hands free operation is achieved by attaching the self holding square to a work surface and then inserting the level into a central channel. An alternative embodiment uses one or more levels which are integrally mounted on the square.

Abstract: A leveling device for assisting in properly orienting picture frames and other hanging articles on a vertical wall surface. Preferably, the device includes a planar body having a bubble level and a suction cup for temporarily affixing the device to a smooth surface of the frame, i.e. a glass pane. A foot surface and planar hooking structure provide alternative affixing structure such that the device can be used on a wide variety of frames and the like.

Abstract: A construction tool for orienting the longitudinal axis of a tubular work piece perpendicular to the horizon (i.e. in a true vertical position) is disclosed. The tool comprises a concentric stack of tool sections increasing in external cross section area, similar in appearance to an upside down layered cake. The external cross section configuration of each succeeding plate is dimensioned to conform substantially with an interior cross section of various hollow tubular work pieces. Located at the center point the top tool section is a conventional bulls eye level. A trough is located in the sidewall of the tool parallel to a longitudinal axis of the tool. The cross section of the trough is dimensioned to conform substantially with the exterior of a hollow or solid tubular work piece.

Abstract: A carpenter's square is provided which is uniquely configured for use in the construction of a building which utilizes metal framing members. The square is adapted to enable a steel wall stud to be aligned and oriented relative to a steel track to which the stud is to be fastened, and thereafter maintained in proper alignment while the stud is being secured to the track. The square includes a pair of detachable legs. One leg has an inner longitudinal edge formed with a longitudinal recess which extends across the entire width of the edge, such that a gap is created between the leg and a planar surface abutted against the edge of the leg. The longitudinal recess accommodates a portion of the track which extends over the stud, as well as the head of a fastener used to secure the stud to the track. To stabilize and secure the square to the wall stud, at least one of the legs is equipped with a magnetic portion which magnetically adheres the leg to the stud or track.

Abstract: A holder for releasably engaging a level and pencil therein. The holder generally comprises a housing having first and second open ends configured to releasably fit about a carpenter's pencil. A window is centrally positioned in a wall of the housing and between two longitudinally spaced-apart walls positioned within the housing which form a chamber therebetween. A port in each wall allows for extension of a bubble level between the end walls through the chamber and adjacent the window.

Abstract: A continuous casting mold cavity narrow faceplate taper gauge that includes a mounting bracket having a first portion with abutment feet for engaging a narrow faceplate of a continuous casting mold cavity and a second portion having a surface disposed at an angle to true horizontal that varies as a function of angle of the faceplate engaged by the first portion. An inclinometer is disposed on the surface of the second portion for providing an electrical signal that varies as a function of angle of the surface to true horizontal. An electronic display is responsive to such electrical signal for indicating taper angle of the faceplate engaged by the bracket.

Abstract: An electricians tool is disclosed which comprises a body which houses a sliding arm. This arm engages in an electrical outlet box cover to hold the tool under spring pressure in the said cover. A horizontally disposed spirit level and a vertically disposed spirit level are used to align the electrical outlet box cover so that it may be fastened level.

Abstract: A tool for aiding in the leveling of electrical switches. This tool rests on the top portion of the rim around the toggle of single, and three and four-way switches that have a metal mounting bracket. This tool holds itself to the switch so that the user has use of both hands for adjusting and fastening purposes.

Abstract: To increase the slip resistance of level indicators, which comprise an elongate body, spirit level capsules inserted therein and protective end caps, the contact surface adjoining the measuring surface of the level indicator is provided with zones having a high coefficient of friction, for example by clipping on strips consisting of rubber, rubber like plastics material or felt. The strips are shaped to cause the body to incline so that the measuring surface is more toward the support which the contact surface faces.

Abstract: A leveling device is provided that has a hollow thin rectangular housing and is constructed of transparent plastic. The housing holds two different types of fluids, such as oil and water, or a mix of air and fluid. The two immiscible fluids allow the device to be used as a level which operates when the line between the fluids aligns with a datum line that is etched or marked upon the surface of the transparent housing. The device can be attached to an article to be leveled by an adhesive back on the leveling device or alternatively by thumb tacks inserted through holes provided in the housing of the device. The relatively long line between fluids allows the device to be used in judging the degree to which the article is non-level relative to its environment, and also allows the device to hang an article at a specific angle relative to a wall, floor or ceiling. A version of the level can be constructed with a flexible and bendable housing to allow the level to be used to align objects of any shape.

Abstract: A circular target type bubble level slides easily onto and off of a standard surveyor's sight rod. When slid into position at any desired elevation on the rod for optimal viewing and released, the device automatically assumes a position such that the indicating plane of the level is exactly at right angles to the long axis of the rod. When the rod is adjusted so that the bubble level indicates the true horizontal, then the rod will be plumb. The rod is received in a through hole of a rod-encircling member. A spring bias element within the hole is forced against the rod. This forces a diametrally opposed support wall portion of the member against the rod with sufficient force to hold the level at any position on the rod without operator adjustment. It also automatically positions the indicating plane of the level orthogonal to the long axis of the rod, because the bubble level element is rigidly mounted with the desired orientation relative to the support wall portion forced against the rod.

Abstract: An adjustable level having an angled base with legs extending normal to one another from a common edge and with magnets spaced along and extending fully through each leg; an L-shaped bracket having at least one bubble housing fixed to a leg thereof; a post extending from the base and through a hole in the bracket; a spring on the post and between a head on the post and the bracket to bias the bracket towards the base and to thereby engage ribs on the bracket into grooves on the base; and a retainer for retaining the level to objects, including a flexible cord connected to a return spring and a loop and hook to secure the cord in a pulled out condition surrounding an object.

Abstract: A C-clamp with integral bubble levels comprising a C-clamp which has a horizontal portion with two generally parallel vertical portions extending perpendicularly from the ends of the horizontal portion. The first vertical portion is formed with a threaded circular aperture with the axis of which is parallel with the horizontal portion. The second of the vertical portions is provided with a planar surface perpendicular to the axis of the aperture. A rod with exterior threads extends through the aperture and is rotatably coupled thereto whereby rotation of the rod will effect its axial movement. The end of the rod between the vertical portions is provided with a planar surface parallel with the planar surface of the first vertical portion. A planar surface is formed on the horizontal portion on the side thereof remote from the vertical portions. A bubble level is removedly secured to the planar surface.

Abstract: A laser positioning device is provided in which a level is associated with a demountable mounting set-up and a plate member. The plate member projects laterally from the level and is scribed with a protractor. A pointer is pivotally associated with the apex of the protractor. A laser beam generator is associated with the pointer. Thus, a laser beam from this generator can be impinged against a remote target location that is in a predetermined orientation relative to the generator when the device is mounted by the mounting set-up.