DESC:FIELD OF THE INVENTION:
The present invention relates to the measurement tool used for the pressure hull. More specifically, the present invention relates to the tool for measuring the height of the frame of the pressure hull in the submarine.

BACKGROUND AND PRIOR ART:
The pressure hull is the load-bearing structure of the submarine, which is designed to withstand the compressive pressures imposed by hydrostatic pressure. The pressure hulls are often made of a combination of ring-stiffened cylinders and cones because circular cross-sections are the most effective geometries for resisting these compressive stresses. The ring frame is a typical stiffener supporting the pressure hull, with the most used T-shaped section and is usually located inside the pressure hull. The T-Shaped stiffening members welded to the inner wall of the pressure hull of the submarine.

Submarine pressure hulls are completely circular within very small tolerances. As a result, it is essential to precisely measure the curvature of the newly built hull structure or repaired hull structure. As the curvature of the hull is not uniform and changes over its length, the measurement of the height of the frames is time-consuming and prone to error. It is very difficult to measure the height along the centerline of the frame.

Various methods may be employed for measuring the height of the frame of the pressure hull. As an acceptable procedure, measurements were taken at the forward side and aft side separately and then the average of them was considered. However, such a process is relatively tedious, time-consuming, and possibly not as accurate as required to take two different measurements each time, followed by a calculation of the average.

Hence, the adjustable frame height gauge of the present invention resolved the above-mentioned problem and facilitates for more precise measurement of the frame height on the curved surface of the hull.

SUMMARY OF THE INVENTION:
The principal object of the present invention is to provide an apparatus to measure the height of the frame of the pressure hull of a submarine.

Another object of the present invention is to provide an apparatus for the measurement of the vertical height of the frame precisely with the curved reference base.

Another object of the present invention is to provide an apparatus that can be used on any curved surface for measuring vertical height.

One of the object of the present invention is to achieve variable accuracy by using the vernier calliper with various least count.

Another object of the present invention is to provide a measurement tool that takes less time for measuring the height of the frame of the hull structure.

Yet another object of the present invention is to measure frame height accurately with single measurement reading.

Another object of the present invention is to provide an apparatus that reduces the time required to measure the frame's height.

Accordingly, the adjustable frame height gauge is provided herewith. The adjustable frame height gauge comprises at least one measuring tool, at least one rotating base, at least one fixed base, and plurality of tightening members.

In an embodiment, the measuring tool may be a vernier calliper. Further, the rotating base is provided with at least two support members. The fixed base is provided with at least two support members. The tightening members may be plurality of screws.

BRIEF DESCRIPTION OF DRAWINGS:
The objects, features and advantages of the invention will best be understood from the following description of various embodiments thereof, selected for purposes of illustration, and shown in the accompanying figure.

Figure 1: illustrates the perspective view of the adjustable frame height gauge.
Figure 2: illustrates the fixed base and the rotating base with holding slot.

List of reference numerals
Part ref Description
10 An adjustable frame height gauge
1 Vernier calliper
2 Fixed base
3A, 3B Support legs of fixed base
4 Rotating base
5A, 5B Support legs of rotating base
6 Holding slot

DETAILED DESCRIPTION OF THE INVENTION:
The invention is described herein in detail with the help of figures appended at the end of the specification. The figures illustrate the preferred embodiment as well as other embodiments that define the scope of the present invention. However, it may be understood that the figures presented herein are intended to exemplify the scope of the invention only. The person skilled in art may note that by no means the figures limit the scope of the invention. Any variation in the drawings by any other person will be falling in the scope of the present invention.

The principal embodiment of the present invention is to provide the adjustable frame height gauge for measuring the height of the frame on a curvature of the pressure hull. Further, the said gauge accurately measures the height of frames or stiffener attached to any curved surface in a single reading.

Accordingly, the adjustable frame height gauge is provided herewith. The adjustable frame height gauge comprises at least one measuring tool, at least one rotating base, at least one fixed base, and plurality of tightening members.

In an embodiment, the measuring tool may be a vernier calliper. Further, the rotating base is provided with at least two support members. The fixed base is provided with at least two support members. The tightening members may be plurality of screws.

FIG. 1 shows the perspective view of an adjustable frame height gauge 10 of the present invention. An adjustable frame height gauge 10 is comprised of a vernier caliper 1, a fixed base 2 with two support legs 3A,3B, a rotating base 4 with two support legs 5A,5B, and a holding slot 6. The fixed base 2 and the rotating base 4 are fastened to the vernier calliper 1 with the aid of the plurality of tightening screws.

By referring to Fig. 2, the fixed base 2 and the rotating base 4 are connected through the plurality of tightening screws. A holding slot 6 is provided in the fixed base 2 to hold the gauge 10 while measuring, making it more convenient.

In a preferred embodiment according to the present invention, an adjustable gauge 10 for measuring frame height on any curved surface comprises, at least one measuring tool 1; at least one fixed base 2 with support members 3A, 3B, fastened to said measuring tool 1; at least one rotating base 4 with support members 5A, 5B, fastened to said measuring tool 1; and plurality of tightening members 6 for fastening.

In a same preferred embodiment according to the present invention, said measuring tool 1 is selected from vernier calliper.

In a same preferred embodiment according to the present invention, said fixed base 2 comprises a holding slot 6 for holding the gauge 10.

In a same preferred embodiment according to the present invention, said tightening members 6 are selected from screws.

Advantages:
(i) Less labour.
(ii) More reliable.
(iii) More precise and accurate.
(iv) Achieve variable accuracy
,CLAIMS:1. An adjustable gauge 10 for measuring frame height on any curved surface comprising,
at least one measuring tool 1;
at least one fixed base 2 with support members 3A, 3B, fastened to said measuring tool 1;
at least one rotating base 4 with support members 5A, 5B, fastened to said measuring tool 1; and
plurality of tightening members 6 for fastening.

2. The gauge 10 as claimed in claim 1, wherein said measuring tool 1 is selected from vernier calliper.

3. The gauge 10 as claimed in claim 1, wherein said fixed base 2 comprises a holding slot 6 for holding the gauge 10.

4. The gauge 10 as claimed in claim 1, wherein said tightening members 6 are selected from screws.