Title of Invention

"A SLOPE MEASURING INSTRUMENT USEFUL FOR MEASURING AN ANGLE ON A SLOPE OF A SURFACE"

Abstract

A slope measuring instrument useful for measuring an angle on a slope of a surface which characterised by a circular tube filled with spirit with an air bubble left in the liquid , the said circular tube being sandwiched between circular discs, the said circular disc(s) is calibrated to 360 divisions, a rider being mounted on the axis of the said disc so that it ride over the said circular tube.(Fig-1)

Full Text

Field of Invention The present invention relates to slope measuring instrument. More particularly it relates to a slope-measuring instrument useful for angle measurement and setting. Background & Prior art In building, dam etc. construction, it is often useful to obtain multiple reference lines which are used to align successive rows or course of building materials. Prior art discloses the several instruments in an effort to measure the slope or angle. A first reference point is marked on the wall surface and a spirit level or the like, typically having a bubble in a curved third filled tube, is used to draw a horizontal line from the point to provide an initial reference line for example by snapping a chalked line. U.S. Pat. No.l, 305,062 discloses the line holder which can be operated by a single person in order to snap three successive parallel chalk lines a predetermined distant apart. The line holder has a spring-loaded pivoting arm that is operable to hold one end of a chalk line and is movable between three distinct positions where the line is successively struck. The line holder is useful for determining a reference line position on only one side of the roof. The operator must place the opposite end of the chalk line at the proper position when the line is struck, and thus must match the distance b/w the arm and a reference point on the first side, to avoid introducing an error. For vertical surfaces; a spirit level is useful to double check lines at the later courses. However, strictly horizontal reference lines are not always the object, especially for an inclined surface such as roof. Parallel lines at other angles may be desirable e.g. to match a non-horizontal edge along eaves or to mark an edge approaching a hip for installation of flashing, or for other purposes. These reference lines are difficult to obtain except by careful measurement from an initial reference line. In connection with leveling apparatus, it is known to provide a form of level for determining horizontal alignment with respect to plumbline having a stable anchor point. U.S. Pat No.4, 532,718 a plumbing apparatus including a circular spirit level attached to a straight edge body adapted to carry a reference point vertically including a leveling device to determine level condition in all horizontal directions. U.S. Pat No.l, 258,597 shows a device with two pendulums on perpendicular pivot axis, a transverse axis pendulum being gimbaled to a longitudinal axis pendulum. The pendulum indicate till on an axis parallel to a line of elongation of the tool, an on an axis transverse to the line of elongation, but the axis are spaced above the base of the device. And thus spaced above the surface of the incline. It would be the possible to place the device at a given point on the inclined plane and at a given alignment, to note the two angular readings; to move the device to a new location a distance away, the adjust tile deice to obtain the same two angles. However, it is due to the two indicators. The reading of both indicators change simultaneously when moving the device in any direction other than rotating it around one of the axis. Whereas the axis is spaced above the base, lifting one end of the device can change the reading. U.S. Past No.5, 001,838 is concerned with spirit lacks suitable for use by carbines, bricklayers or the like, which levels can be used not only to provide an indication of whether a surface is vertical or horizontal but also to provide a measure of the angle of such a surface relative to the vertical or horizontal. Object of the invention The main object of the present invention is to provide a slope measuring instrument useful for angle measurement and setting. Another object of the present invention to provide an economic and efficient instrument that can use another option of the plumb line and spirit level. Still another object of the present invention to provide an instrument for setting of shutters at different angles and leveling of floors. Yet another object of the present invention to provide an instrument which for on the spot measurement of huge structures like flyovers, hanging bridges, dams etc. Yet another object of the present invention to provide an instrument for erection and positioning of precisic, machine tools. Yet another object of the present invention to provide an instrument for erection and fabrication of trees wood. Yet another object of the present invention to provide an instrument for measuring different angles (fig.2) 1 Summary The present invention relates to an instrument useful for measuring of angle on a slope of a surface comprising with vertically mounted circular tube filled with spirit with a bubble is left in the sprit and sandwiched between circular discs. Description of Drawings In the drawing accompanying this specification fig. 1 represents the proto type universal spirit level & slope measuring instrument. In the drawing accompanying this specification fig.2 represents the measurement by instrument at different level. Statement of the invention Accordingly the present invention provides a slope measuring instrument useful for measuring an angle on a slope of a surface which characterised by a circular tube filled with spirit with an air bubble left in the liquid , the said circular tube being sandwiched between circular discs, the said circular disc(s) is calibrated to 360 divisions, a rider being mounted on the axis of the said disc so that it ride over the said circular tube. In an embodiment of the present invention a circular tube is filled with spirit with insertion of a bubble left. In another embodiment of the present invention the tube is sandwiched between two circular discs which is calculated to 360 divisions/degrees ranging from 0° to 180° and 0° to-180° In yet another embodiment of the present invention the rider is mounted at the axis ride over the tube to locate the center point of the bubble, by the marking of the center angle of the shape can be measured. A circular transparent plastic tube is vertically mounted on a horizontal platform. The circular tube is filled with spirit. A bubble is left in the spirit. The tube is sandwiched between two circular discs. The circular disc is calibrated to 360 dimensions/degrees, ranging from 0° to 180° and 0 to-180°. A rider is mounted at the axis to ride over the tube to locate the center point of the bubble. From the certer marking the angle of the slope can be measured. The base of the instrument is placed on the inclined surface. The ride is fixed over the air bubble and the center point is located. The reading against the center of the bubble gives the inclined angle. Different angle measures are shown in fig. 2 . It is an innovative cost effective instrument that can be easily handled by even an unskilled person. By measuring the angles the height and distances also can be calculated; but angles of moving bodies cannot be measured by it. This instrument have limited accuracy level i.e. 1°. The instrument can be use for setting of shutter at different angles and leveling of floors; for fixing frames of doors and windows; for on the spot measurement of huge structure like flyovers; hanging brides, dams etc, for action and positioning of precision machine tool etc. The following exam: is with reference to the specification and shall not be construed to limit the scope of the invention. Example 1 The base of the instrument is placed on the inclined surface. The rider is fixed over the air bubble and the center point is located. The reading against the center of the bubble gives the inclined angle. Different angle measures are shown 1 in the figure 2. Advantages The main advantages of the present invention are: 1. The instrument is smaller size handy to use. 2. The instrument measures slope angles from 0° - 360°. 3. The instrument requires no power source. 4. The instrument has an accuracy level 1°. 5. The instrument does the function of both plumb line and spirit level. 6. The instrument does not need any skill and calculations. We claim: 1. A slope measuring instrument useful for measuring an angle on a slope of a surface which characterised by a circular tube filled with spirit with an air bubble left in the said spirit, the said circular tube being sandwiched between circular discs, the said circular disc(s) is calibrated to 360 divisions, a rider being mounted on the axis of the said disc so that it ride over the said circular tube. 2. A slope measuring instrument as claimed in claim 1, wherein the said 360 divisions ranging from 0° to 180° and 0° to -180°.

Documents:

1466-DEL-2003-Abstract-(02-12-2010).pdf

1466-DEL-2003-Claims-(02-12-2010).pdf

1466-DEL-2003-Claims-(24-02-2012).pdf

1466-del-2003-claims.pdf

1466-DEL-2003-Correspondence Others-(24-02-2012).pdf

1466-del-2003-correspondence-other.pdf

1466-DEL-2003-Correspondence-Others-(02-12-2010).pdf

1466-del-2003-correspondence-po.pdf

1466-DEL-2003-Description (Complete)-(02-12-2010).pdf

1466-DEL-2003-Description (Complete)-(24-02-2012).pdf

1466-del-2003-description (complete).pdf

1466-DEL-2003-Drawings-(02-12-2010).pdf

1466-del-2003-drawings.pdf

1466-DEL-2003-Form-1-(02-12-2010).pdf

1466-DEL-2003-Form-1-(24-02-2012).pdf

1466-del-2003-form-1.pdf

1466-del-2003-form-18.pdf

1466-DEL-2003-Form-2-(02-12-2010).pdf

1466-del-2003-form-2.pdf

1466-del-2003-form-3.pdf

1466-del-2003-form-4.pdf

1466-del-2003-form-5.pdf