NZ779385A - Leveling instrument with multiple sensitivities - Google Patents
Leveling instrument with multiple sensitivitiesInfo
- Publication number
- NZ779385A NZ779385A NZ779385A NZ77938521A NZ779385A NZ 779385 A NZ779385 A NZ 779385A NZ 779385 A NZ779385 A NZ 779385A NZ 77938521 A NZ77938521 A NZ 77938521A NZ 779385 A NZ779385 A NZ 779385A
- Authority
- NZ
- New Zealand
- Prior art keywords
- vial
- axis
- liquid
- carrier
- axes
- Prior art date
Links
- 230000035945 sensitivity Effects 0.000 title claims abstract 19
- 239000000969 carrier Substances 0.000 claims abstract 25
- 239000007788 liquid Substances 0.000 claims abstract 21
- 238000005259 measurement Methods 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 claims 1
Abstract
A leveling instrument includes a generally elongate carrier defining a carrier axis. A first liquid-filled bubble vial is mounted on the carrier and defines a first vial axis and an internal generally barrel-shaped surface of revolution about the first vial axis formed by a curve having a predetermined curvature to exhibit a first sensitivity. A second liquid-filled bubble vial defines a second vial axis and has a generally barrel -shaped surface of revolution about the second vial axis and formed by a curve having a curvature less pronounced than the predetermined curvature of the first vial to exhibit a second sensitivity greater than the first sensitivity, the first and second vial axes being generally parallel to each other. If the vials are curved they are similarly oriented and have different curvatures to exhibit different sensitivities. A method of using the multi-vial leveling instrument is described. ned curvature to exhibit a first sensitivity. A second liquid-filled bubble vial defines a second vial axis and has a generally barrel -shaped surface of revolution about the second vial axis and formed by a curve having a curvature less pronounced than the predetermined curvature of the first vial to exhibit a second sensitivity greater than the first sensitivity, the first and second vial axes being generally parallel to each other. If the vials are curved they are similarly oriented and have different curvatures to exhibit different sensitivities. A method of using the multi-vial leveling instrument is described.
Claims (20)
1. A leveling instrument comprising a generally elongate carrier defining a carrier axis; a first liquid-filled bubble vial mounted on said r and defining a first vial axis and an internal generally barrel-shaped e of revolution about said first vial axis formed by a curve having a predetermined curvature; a second liquid-filled bubble vial defining a second vial axis and having a lly barrel -shaped e of revolution about said second vial axis and formed by a curve having a curvature less pronounced than said predetermined curvature, said first and second vial axes being generally parallel to each other.
2. A leveling instrument as defined in claim 1, wherein said first and second vial axes are generally parallel to said carrier axis.
3. A leveling instrument as defined in claim 2, wherein said first and second vial axes are generally aligned or co-extensive in line.
4. A leveling instrument as d in claim 2, wherein said first and second vial axes are offset from each other along a direction normal to said carrier axis.
5. A leveling instrument as defined in claim 1, wherein said first and second vial axes are generally normal to said r axis.
6. A leveling instrument as defined in claim 1, n said predetermined curvature is formed by a circular arc having a radius R1 and said surface of revolution of said second vial is formed by a circular arc having a radius R2, wherein R1 < R2.
7. A leveling instrument as defined in claim 6, wherein R2/R 1 > 2.
8. A leveling instrument as defined in claim 7, wherein R2/R 1 > 5. REFORMATTED APPLICATION
9. A leveling instrument as defined in claim 1, wherein said first and second vials are arranged on said elongate carrier in a region at one axial and of said carrier.
10. A leveling instrument as defined in claim 1, wherein said carrier includes first and second liquid-filled bubble vials with first and second vial axes are generally parallel to said carrier axis and another set of first and second vials with first and second vial axes lly dicular or normal to said carrier axis.
11. A leveling instrument as d in claim 1, wherein said curvatures are non-circular.
12. A leveling instrument as defined in claim 1, wherein at least one of said vials is provided with markings.
13. A ng instrument as defined in claim 11, n said first vial is provided with markings to designate when a liquid-filled bubble and said first vial is substantially centered along said first vial axis, and said second vial is provided with markings to designate when a liquid-filled bubble and said second vial substantially centered along said second vial axis.
14. A leveling instrument as defined in claim 1, wherein said first and second liquid-filled bubble vials are incorporated in separate blocks or members that are d on said elongate carrier.
15. A leveling instrument comprising a generally elongate carrier defining a carrier axis; a first liquid-filled bubble vial defining a first vial axis and a first vial sensitivity; a second liquid-filled bubble vial defining a second vial axes and a second vial ivity, said first and second vial axes being generally parallel to each other.
16. A leveling ment as defined in claim 14, wherein said second vial sensitivity is greater than said first vial sensitivity. REFORMATTED APPLICATION
17. A method of making measurements with a level comprising the steps of arranging and elongate carrier defining a carrier axis on a surface to be ed; providing first and second liquid-filled bubble vials on said carrier defining first and second vial axes, respectively, said first and second vial axes being parallel to each other and said first vial having a predetermined sensitivity while said second vial has a sensitivity greater than said ermined sensitivity; observing the e while moving the liquid-filled bubble and said first vial until said liquid-filled bubble and said first vial is substantially centered along said first vial axis; when said liquid-filled bubble and said first vials substantially centered observing the bubble in said second liquid-filled bubble vial and moving the surface until the bubble in said second liquid-filled bubble vial is ntially centered, whereby said first liquid-filled bubble vial es a coarser ement and said second liquid-filled bubble vial provides a finer measurement to improve precision of measurement.
18. A method as defined in claim 16, wherein said first and second vial axes are generally parallel to said carrier axis.
19. A method as defined in claim 16, wherein said first and second vial axes are generally normal to said carrier axis.
20. A method as defined in claim 16, further providing at least two sets or pairs of vials on said elongate r, at least one set of first and second liquid-filled bubble vials being arranged with axes generally parallel to said carrier axis in at least one set of first and second liquid-filled bubble vials being arranged with axes generally normal to said carrier axis. REFORMATTED APPLICATION ABSTRACT OF THE DISCLOSURE A leveling instrument includes a generally elongate carrier defining a carrier axis. A first -filled bubble vial is mounted on the carrier and s a first vial axis and an internal lly barrel-shaped surface of revolution about the first vial axis formed by a curve having a predetermined curvature to exhibit a first sensitivity. A second -filled bubble vial defines a second vial axis and has a generally barrel -shaped surface of revolution about the second vial axis and formed by a curve having a ure less pronounced than the predetermined curvature of the first vial to exhibit a second sensitivity greater than the first sensitivity, the first and second vial axes being generally parallel to each other. If the vials are curved they are similarly oriented and have different curvatures to exhibit different sensitivities. A method of using the multi-vial leveling instrument is described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/005,836 | 2020-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NZ779385A true NZ779385A (en) |
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