Abstract: An instrument for determining level or plumb orientations includes an elongated body having a plurality of orientation measurement devices. Each of the orientation measurement devices can indicate either a level or plumb orientation depending on a position of the instrument. The orientation measurement devices each include a chamber having front and rear convex sides, a fluid contained in the chamber, and an air bubble floating in the fluid. The elongated body includes a set of first openings and a set of second openings. The orientation measurement devices are embedded into the elongated body through the first set of openings and the orientation measurement devices each include bubble therein viewable from the front and back of the elongated body. The bubble is also viewable from the top and bottom of the elongated body through the second set of openings.

Abstract: An instrument for determining level or plumb orientations includes an elongated body having a plurality of orientation measurement devices. Each of the orientation measurement devices can indicate either a level or plumb orientation depending on a position of the instrument. The orientation measurement devices each include a chamber having front and rear convex sides, a fluid contained in the chamber, and an air bubble floating in the fluid. The elongated body includes a set of first openings and a set of second openings. The orientation measurement devices are embedded into the elongated body through the first set of openings and the orientation measurement devices each include bubble therein viewable from the front and back of the elongated body. The bubble is also viewable from the top and bottom of the elongated body through the second set of openings.

Abstract: A golf club fitting apparatus and a method for fitting using the apparatus are provided. The golf club fitting apparatus may be attached to a golf club and provide fitting information including effective lie angle and effective loft angle. The golf club fitting apparatus includes a lower surface that contacts a butt end of a grip, an upper surface opposite the lower surface, and a side surface connecting the upper and lower surfaces. An angle indicator is disposed at a predetermined angle relative to a shaft axis of the golf club so as to rest in a neutral position when the golf club is in a normal address position.

Abstract: A method and device are described for defining a pair of position angles needed to measure an angular location of a point in space with respect to a central point using a sphere having surface measurements substantially similar to a Cartesian coordinate system, and a cardinal point with a pair of angular coordinates thereof that represent the pair of position angles. The method may also be performed using a substantially Cartesian two dimensional surface wherein the diameter of the sphere divided by the fractional length of the coordinate along the X and Y axes provides the X and Y angular values of the pair of position angles, respectively. Such features enable use of this method for simplification of computational tasks, as well as more readily understandable graphics and devices regarding the position, trajectory, and orientation of an object in space.

Abstract: A level for indicating the orientation of a surface includes a first planar surface, a second planar surface, and a web coupled to the first planar surface and the second planar surface such that the first planar surface is spaced apart from and is parallel to the second planar surface. A vial defines a long axis and contains a liquid and a gas bubble. The vial is coupled to the web such that the long axis is substantially parallel to the first planar surface. A tube deburring portion is coupled to the web and includes a male conical portion arranged to deburr an inner edge of a tube and a female conical portion arranged to deburr an outer edge of the tube.

Abstract: A ball cavity cube vial comprising a cube made of an at least translucent material, and having a sealed ball cavity in its center, said ball cavity being incompletely filled with a liquid medium such that a bubble is left inside of said ball cavity; and markings associated with said cube, said markings being calibrated to function as reference points for said bubble.

Abstract: A multi-axis level is disclosed having a body member with two side members forming a right angle therebetween. The body has a length extending in a longitudinal direction. The multi-axis level also includes a bubble housing coupled to the body member. One or more bull's eye bubble levels are coupled to the bubble housing, which is oriented in a plane normal to the longitudinal direction. Additionally, a tubular bubble level is coupled to the bubble housing. A tube of the tubular bubble level has a length that is oriented parallel to the longitudinal direction.

Abstract: A level for indicating the orientation of each of a surface, a first electrical device, or a second electrical device, the level including a first planar surface, a second planar surface, a web, and a vial. The web is coupled to the first planar surface and the second planar surface such that the first planar surface is spaced apart from and is parallel to the second planar surface. The vial has a long axis and contains a liquid and a gas bubble and is coupled to the web such that the long axis is substantially parallel to the first planar surface. A first perimeter is formed as part of the web, shaped substantially the same as a portion of the first electrical device, and sized to engage the portion of the first electrical device such that the vial is operable to indicate the orientation of the first electrical device.

Abstract: The dual-globe level comprises at least one indicator located on a body. The body defines front and rear faces, a pair of opposing ends, and at least one longitudinal surface. The at least one indicator comprises an inner vessel located within an outer vessel, and more preferably, a substantially spherical inner globe located within an outer globe and buoyantly supported within the outer globe. The inner globe, viewable through the outer globe and defining an equator around its outer periphery, is buoyantly biased within to maintain the equator in a substantially horizontal position. The equator is in operable registry relation with a first indicia to indicate a position of the at least one longitudinal surface of the body in relation to a surface or line in question located adjacent thereto.

Abstract: A method and device for calibrating a mobile terminal including a motion sensor reduces erroneous calibrations. The method of calibrating a mobile terminal by detecting an inclination of at least two directions preferably includes: activating a calibration mode for calibrating an error of the motion sensor. When a calibration mode is activated, a user interface screen for calibrating the motion sensor is output. The user interface screen outputs a coordinate system for displaying at least two facets of information; and inclination information of at least two directions received from the motion sensor is output as one image on the coordinate system.

Abstract: A spirit level (1) comprises a planar base (14) for resting, in use, on a surface whose level is to be determined, and levelling means (27) comprising a vial (41) filled with sufficient liquid that an air bubble (47) is formed within the vial (41). The spirit level (1) comprises indicia (43, 45) relative to which the bubble (47) moves as the orientation of the spirit level (1) is altered so as to indicate the orientation of the spirit level. Optical means (29) is provided on the spirit level (1) to provide an image indicative of the position of the bubble (47) relative to the indicia (43, 45).

Abstract: A spirit level (1) comprises a planar base (14) for resting, in use, on a surface whose level is to be determined, and levelling means (27) comprising a vial (41) filled with sufficient liquid that an air bubble (47) is formed within the vial (41). The spirit level (1) comprises indicia (43, 45) relative to which the bubble (47) moves as the orientation of the spirit level (1) is altered so as to indicate the orientation of the spirit level. Optical means (29) is provided on the spirit level (1) to provide an image indicative of the position of the bubble (47) relative to the indicia (43, 45).

Abstract: A level measuring tool for an object having a measuring surface includes a level housing and a measuring arrangement. The level housing has a measurement cavity and a level surface adapted for sitting on the measuring surface of the object. The measuring arrangement includes a liquid indicator received in the measurement cavity of the level housing, and a plurality of level markers spacedly provided at a peripheral side of the liquid indicator to indicate an inclination angle of the level surface of the level housing at 0°, 45°, and 90° levels respectively, wherein the liquid indicator contains a predetermined volume of liquid therein and an indicator bubble movably floating on the liquid such that the measuring arrangement is adapted for measuring a level of the measuring surface when the indicator bubble moves at one of the level markers.

Abstract: A potential parking area level indicator is provided that includes a centralized hub with a plurality of arms depending therefrom. Preferably, four arms are provided that are spaced 90 degrees from each other thereby defining two sets of opposing arms. In operation, a driver of an RV would locate the level indicator on a potential parking area thereby placing the arms onto the potential parking surface. If the line defined by a pair of opposed arms is placed on a generally level area, indicator lights will illuminate indicating that fact. If, however, the line defined by opposing arms is placed on a grade that is not acceptable for parking, the indicator lights will not illuminate showing that the potential parking area is unsafe for parking. Proper illumination of the lights is driven by accelerometers incorporated into the arms of the level indicator.

Abstract: A pocket level having a detachable line level whose bubble vial doubles as the pocket level's horizontal bubble vial, and an angle finder for enabling the determination of the angle of an inclined surface which includes a bubble vial housed in a wheel rim directly rotated by a user applying a rotation force to a portion of its exterior non-slip circumferential wheel rim surface preferably accessible via a throughgoing cutout formed in the pocket level's upper surface.

Abstract: An omnidirectional torpedo level composed of non-ferrous material has a central web and parallel side flanges defining a torpedo level geometry. The central web and side flanges define windows within which are mounted vertical and horizontal tubular spirit level elements that permit selective orientation of the side flanges to determine when surfaces being engaged by the side flanges are either vertically or horizontally oriented. A rotary protractor is mounted to the central web and contains a spirit level tube for accurate positioning of the side flanges with respect to the selected angle of the protractor. Magnet members are mounted to one or both of the side flanges and serve to support the level device in hands-off relation when in contact with ferrous metal objects. A circular omnidirectional level enlargement is provided at the upper end portion of the level body and provides for support of a circular omnidirectional level device having a circular lens marked with circular positioning indicia.

Abstract: An aerospace system includes a leveling device defining two plane levels (yz-plane and xz-plane). The plane levels are included within an inertial measurement unit and each of the plane levels includes two capacitance controlled oscillators. Each of the capacitance controlled oscillators includes a quad capacitor bubble sensor.

Abstract: A level having a frame with an edge rail and a web extending from the edge rail at right angles. A web opening is provided in the web. A capsule assembly is mounted on the web at the web opening. The capsule assembly has a transparent capsule having a liquid therein and outer cover plates mounted over the capsule on each side of the web. The volume of the liquid in the capsule is less then the volume of the interior of the capsule so that an upper surface of the liquid is formed in the entire surface of which is viewable through the transparent capsule.

Abstract: A graduated element attachment system in a position measuring system, the graduated element attachment system including a graduated element having a circumferential face and a holder. The holder includes a plurality of resilient elements, wherein each one of the plurality of resilient elements engages the circimferential face in such a manner so that the graduated element is clasped in several directions and wherein each of the plurality of resilient elements exerts a force on the graduated element wherein the exerted forces are directed in such a manner so that the plurality of resilient elements maintain the graduated element in equilibrium.

Abstract: The present invention relates to a level. More particularly, the present invention relates to a right/left and vertical level that is capable of right/left and verticality/horizontality measurement at the same time, and is capable of exactly measuring an inclined angle and a minute inclination angle. Therefore, the verticality and horizontality of the right and left can be measured through one work and their inclined directions and angles can be simply and exactly measured. Further, a fine inclined angle (1° unit) of an object can be measured. It is thus possible to improve the efficiency of a worker in construction fields, shorten working hours, and thus improve the efficiency of the work.

Abstract: A multiple use level having an elongated body having two flange-like legs which extend at a right angle from one another from the corner apex. An L-shaped bracket is rotatably attached to one of the legs such that it may be freely rotated to any desired angle, then locked in position. The bracket includes a bull's-eye level on a first face thereof and a center line vial level attached to a rotating dial on a second face. A sighting laser may be detachably mounted on the L-shaped bracket. The level may be attached to a pipe or other member using magnets disposed in the body thereof or with an attachment cord. A flange bracket may be removable attached to one leg allowing pipe flanges to be oriented, alternatively the flange bracket may be integrated into the leg. Methods and processes for positioning construction members are also disclosed.

Abstract: The present invention relates to a level. More particularly, the present invention relates to a right/left and vertical level that is capable of right/left and verticality/horizontality measurement at the same time, and is capable of exactly measuring an inclined angle and a minute inclination angle. Therefore, the verticality and horizontality of the right and left can be measured through one work and their inclined directions and angles can be simply and exactly measured. Further, a fine inclined angle (1° unit) of an object can be measured. It is thus possible to improve the efficiency of a worker in construction fields, shorten working hours, and thus improve the efficiency of the work.

Abstract: A level includes a plate secured to a casing and rotatable relative to the casing between a closed and an open positions. A bubble vial is attached to the plate. The plate has one or more catches for openably securing the plate to the casing. The casing includes one or more retainers for retaining the plate at the open position relative to the casing. A level housing has a chamber for receiving the casing, and the casing has one or more latched engageable with the level housing. The bubble vial preferably includes a cylindrical shape having a flat upper surface.

Abstract: An electrolytic tilt sensor is disclosed which comprises a containment envelope having a metallic container and a header, the envelope defining a chamber and having at least one pair of apertures, an electrolytic solution partially filling the chamber, and at least one pair of electrodes, each electrode including an electrically active, transverse portion positioned within the chamber in a general horizontal alignment with one another defining a tilt axis, and a lead portion extending to the exterior of the envelope through the respective aperture. The tilt sensor may further include a sealing material disposed in each aperture of the providing a substantial fluid-tight seal about the respective electrode.

Abstract: A bubble leveling device includes a bubble level having a gas bubble formed on a liquid surface, an illuminator projecting light through or towards the gas bubble for producing an optical image of the gas bubble, and a sensor having a coordinate screen for locating the image of the gas bubble on the screen for checking the coincidence or deviation of the image with or from the coordinate center of the screen for reliably checking the horizontality or inclination angle as measured by the bubble leveling device.

Abstract: An electric hand drill system comprises a hand held electric drill containing a motor. A coupling ring with a radial slot is formed with an interior bearing surface positionable in contact with a recipient surface on the drill. A handle is in a cup-shaped configuration. A first disk is received upon the coupling ring and has indicia upon the exterior surface.

Abstract: A sighting assembly for providing a reference laser beam in the course of connecting pipe segments to each other includes an elongate body in which a laser pointing course is received and which is pivotally engaged at its front end to an straight edged arm. The body may further include a magnetic compass and a level assembly, both proximate its rear end, to provide a visual indication of the azimuth and inclination thereof. These are achieved by an azimuth ring on the compass projecting into lateral cutouts in the body for manipulative convenience. In one example the arm supports two spaced posts, each including spaced projections for contacting the pipe segment, and when the arm is collapsed below the body for storage the posts are received in the cutouts.

Abstract: A vehicle warning device presents a visual display of unsafe inclinations of the vehicle. A bubble level has a map thereon which presents a plurality of safety vehicle inclinations within its confines. The appearance of a bubble level adjacent the map perimeter the map readily indicates to the vehicle occupant that an unsafe inclination of the vehicle is about to occur so that corrective action can be taken. The map is constructed to reflect various angles of inclination of a vehicle depending on the slope of the underlying vehicle support surface and the angle of approach/departure of the vehicle up or down the surface.

Abstract: The present invention relates to an inclination sensor which utilizes a liquid member having a free surface. A first optical system collimates light emitted from a light source, a dark field pattern allows the light from the first optical system to pass therethrough, a half mirror changes the direction of the light which has passed through the scale pattern, a first liquid member having a free surface reflects the pattern light thus changed its direction by the half mirror, a second optical system focuses the pattern light reflected by the first liquid member, a light receiving means receives a light image formed by the second optical system, and a processing means calculates an inclination on the basis of a reception signal provided from the light receiving means. The scale pattern is formed by a plurality of slits, and the half mirror is disposed on an optical path of both the liquid member and the second optical system.

Abstract: The present invention entails an equipment leveling device comprising a leveling head having a leveling instrument incorporated therein and a series of spaced apart support legs secured to the leveling head and projecting radially therefrom for engaging an object to be leveled and for supporting the leveling head adjacent the object during the leveling process. In the embodiment disclosed, each of the support legs is adjustable in length such that the leveling device can accommodate structures and objects of various size.

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: In a tilt sensor including a sealed container which is comprised of a container body and a top cover plate which is adapted to close the container body and is provided on the inner surface thereof with a recess whose depth gradually increases from the peripheral edge toward the center thereof, and a holder which holds the sealed container, the top cover plate and the holder are provided with a positioning device which determines a relative angular position between the sealed container and the holder. A mask and a coat holder, which are used to form electrodes on the top cover plate are also disclosed.

Abstract: A tilt sensor includes a sealed container formed of a container body, a top cover plate adapted to close the container body and provided on one end surface thereof with a recess having a concave surface whose depth gradually increases from a peripheral edge toward a center thereof. The tilt sensor further includes a liquid enclosure containing an air bubble, that is enclosed in the container body. To coincide the center of the configuration of the top cover plate with a line normal at a deepest portion of the concave surface at a grinding operation after molding the top cover plate, an indicia is provided on the line normal to the concave surface at the deepest point of the concave surface.

Abstract: The present invention relates to an inclination sensor capable of detecting inclinations in two X- and Y- axis directions with use of only a single linear sensor. In this inclination sensor, a first optical system collimates the light emitted from a light source, a dark field pattern allows the light from the first optical system to pass therethrough, a half mirror changes the direction of the light which has passed through the dark field pattern, a first liquid member reflects the light which has been changed its direction by the half mirror, a second optical system focuses the light reflected by the first liquid member, the light receiving means receives a light image formed by the second optical system, and the processing means calculates an inclination on the basis of a reception signal provided from the light receiving means.

Abstract: A combination level has a carrier forming two opposite parallel major surfaces. A tube level is mounted on one of the surfaces of the circular level and a circular is mounted on the other, opposite, surface. either one of the major surfaces can be used directly to abut against a work to be aligned or an additional, preferably elongate, member can be attached to the carrier and which abuts against the work. The carrier is mounted on the abutting member at known angular relationship or the carrier can be mounted for selected angular adjustments abutting to the abutting member, so that selected positioning of the tubular and circular levels are relative to each other on substantially horizontal planes where contact of the work, allows measurement of vertical alignment and plumb condition of the work.

Abstract: A light beam leveling device and method utilizable particularly in hemodynamic cardiac monitoring of patients in which a pressure transducer is required to be leveled with the tip of a catheter placed at the heart of a patient. The light beam device, preferably a laser, is placed at the transducer and is raised and lowered therewith relative to a reference point on the patient corresponding to the level of the tip of the catheter. When the laser beam is projected horizontally as established with associated bubble level means and is directed so as to cause a reflection directly at the reference point, the transducer is assured thereby to be at the level of the catheter tip in the patient. A transparent cylindrical bar at the tip of the laser through which the laser beam passes causes a line of light to be projected at right angles to the orientation of the bar. An associated protractor permits selection of the desired angle of orientation of the line of light projected from the laser.

Abstract: A position sensor comprises two curved surfaces concentrically aligned to form a container which is filled with a viscous fluid and a bubble of a lighter-weight fluid and placed between a radiation source and a radiation detector. The bubble changes position within the container when the sensor is moved, transmitting a beam of radiation from the radiation source through the bubble to activate a section of the radiation detector while the remainder of the radiation is blocked by the fluid. Position sensing circuitry translates a signal from the activated section of the radiation detector into position coordinates for point in space corresponding to the position of the bubble in the container.

Abstract: A spirit level vial construction provides various refinements in the structure and method of manufacture of vials used for the containment of fluid and adapted to be installed in spirit levels. The construction is particularly adapted to use with spherical vials, i. e., level vials having a concave spherical form within the sight glass portion containing the bubble, and adapted to provide level information relative to a planar surface. However, the present construction may also be used for tubular type level vials. Vials using the present construction are formed of plastic materials (particularly acrylics) for economy, and are preferably molded by an injection molding method in order to reduce substantially any warping or deformation during the molding process. Various clear or dyed fluids which are compatible with the plastics may be used, particularly mineral spirits.

Abstract: A generally conventional plumb level having an elongate rectangular body and generally defining an elongate axis is provided with a circular level element at one end surface of its elongate body. A square or right angle abutment contact surface, which is formed by a flat base which is attached to and projects laterally beyond spaced parallel surfaces of the rectangular body for engaging and contacting a structural member to be aligned. The circular level element is either permanently attached to the elongate body or removably attached, in which case it is movable between operative and inoperative positions which do not interfere with the proper placement of the structural member against the abutment contact combination device.

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 referenced, liquid-filled, domed vial, attachable to the free-end of a golf club shaft as indicative of a selected postural shaft angle, offset from the perpendicular.

Abstract: The present invention discloses a tilt sensor including a container having a bubble on a surface of the conductive liquid as the conductive liquid is filled in the container, an electrode to provide a current to the conductive liquid in the container, and terminals to output the current provided from the electrode through the conductive liquid, thereby outputting a tilt sensing signal by the presence of an electric connection between the electrode and the terminals.

Abstract: A level for determining the position of an object relative to the gravitational horizontal. The inventive device includes a rectangular frame having a pair of orthogonally oriented vial levels secured thereto which indicate an orientation of the device in a vertical position. A center web extends across the frame and supports a center level within the frame to indicate an orientation of the device in a horizontal position.

Abstract: A mechanical vehicle leveling device having a circular leveling bubble and four semicircular, mechanical measurement indicators revealed in a top cover unit of the device. The measurement indicators indicate the number of inches each wheel must be raised or lowered to level a vehicle. Four feet rotate the semi-circular indicators when the cover unit is manually adjusted relative to the base unit. The cover unit is adjusted to center the leveling bubble, whereby the movement actuates the four indicator scales to indicate whether to raise or lower each wheel by the indicated inches. A cam adjustment lever can be adjusted to compensate the indicators for wheelbase distance.

Abstract: An arrangement for aligning an apparatus unit with respect to the direction of gravity. The arrangement includes a first support device, a second support device and a third support device acting on a first support point, a second support point, and a third support point, respectively, of the apparatus unit. A measuring level serves to control the alignment of the apparatus unit. The first and second support devices are vertically adjustable. The three support points are arranged in the corners of a triangle. Two separate optically distinguishable partial areas are marked in the region of the measuring level, wherein the first partial area is intersected by a plane through the center of the measuring level extending perpendicularly to the line connecting the first support point and the third support point, and wherein the second partial area is intersected by a plane through the center of the measuring level extending perpendicularly to the line connecting the second support point and the third support point.

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 plumb tool kit attachable to the ends of a common level member, or the like, used to determine vertical alignment. The kit comprises a pair of end caps each having a cap body. Each cap body has a first and a second arm extending therefrom, the first and said second arms forming a right angle. Each cap body has an opening therein to receive a level, each opening having a preselected orientation wherein when the openings of the pair of end caps receive the, the arms are transverse to the level. The first arms and at least a portion of the level define a first plane and the second arms and at least a portion of the level defining a second plane. One or both of the pair of end caps includes an apparatus for determining vertical alignment, such as, for example, a bull's eye level, wherein when the openings of the pair of end caps receive the level, the bull's eye level has a location in a plane transverse to the level.

Abstract: A post level having two spaced holders fixed to two plate-like body members with a notch between the holders. A floor member is integrally attached to the body members. Each holder provides a channel that receives the end of a level vial. One of the holders has a stop to engage an end of the vial. The other holder has a detent fixed thereto that urges and resiliently engages a second end of the vial to hold the vial in position in the holder.

Abstract: An angle finding device particularly in the form of a hammer having a circular or part circular spirit level vial (8) provided with a graduated scale mounted in the hammer head (3). A straight spirit level vial (10, 11) may be positioned across a diameter of the circular vial (8) such that its axis lies at an angle .alpha. to the axis (A) of the shaft. This combination enables the hammer to be used as an angle finding device and a general levelling device when the striking face (6) of the hammer and the end (5) of the shaft are placed against a work surface (W) to be level tested.

Abstract: An all-purpose level in the form of a box that contains a ball rolling on an upwardly concave surface that is a figure of revolution about a vertical axis. The box rests on a member which will be horizontal when the level is in engagement with a truly vertical or horizontal surface. For this purpose, the member is disposed at a right angle to a plate which is hingedly connected to another plate about an axis perpendicular to the plane of the member. The member is selectively lockable in that perpendicular relationship; but when released, the member folds against the first-mentioned plate and the device thus folds about two hinges at right angles to each other, thereby to provide a configuration in which the level can rest on a generally horizontal surface to indicate true horizontal orientation thereof.