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WILD LEVELS FOR EVERY LEVELING TASK

(Source: Wild Heerbrugg Ltd. Heerbrugg Switzerland printed in 1965)

Containers   N10    NA2   N3   Technical Data of Wild Levels   Staves   Invar Leveling Staves    Wild Tripods  
 

Each Wild level has been designed for a particular field of application and with a definite type of user in mind. The range extends from the simple dumpy level, used by the builder or farmer for construction or drainage tasks, to the precision level for the civil engineer or geodetic surveyor who requires the highest possible accuracy. All Wild levels have powerful telescopes, commensurate with their required function, with coated optics, internal focusing-and stadia lines for distance measurement. The initial rapid pre-leveling is made with the aid of a circular bubble and three foot screws, which are protected against dust and which can be adjusted to ensure a smooth and adequate run. In the ease of the Wild NA2 Automatic Engineers' Level, the circular bubble has merely to be centered carefully to make the line of sight horizontal. All knobs are controlled, and all eyepieces are viewed, without the observer having to change his position. The NK01 has a metal horizontal circle as a standard feature. With the exception of the N3, all other levels can be supplied either with or without a glass horizontal circle, depending upon the customer’s requirements. When a glass circle is fitted to a level the code name has a "K” added to it - e.g. NK10, NK2 and NAK2, respectively. In all cases the glass circle of a "K” level is read through the eyepiece of a scale microscope. The main numbered divisions are in degrees or grades and the auxiliary scale is in 10 minute intervals, with accurate estimation possible to 1/10 of each such interval.  

Containers  TOP

The smaller Instruments (NK01, N10 and NK10) have a shock-proof plastic container which is exceptionally strong and long lasting, although very light and easy td handle.

All other Wild levels are carried in metal containers, specially designed to give the maximum protection in the simplest form.  

NK01 TOP

The Wild NK01 Dumpy level is a most convenient level for the building site. The telescope rotates under a friction-braked action, thus requiring no horizontal clamp. Fine pointing is completed by means of a tangent screw. Readings on the metal horizontal circle are made by eye against a fixed index mark, with estimation possible to a tenth of a degree or grade, according to the circle division. The circle itself can be turned by hand to set any desired initial bearing. The circular and tubular level bubbles are seen, free from parallax, in the hinged observation mirror which, when closed, protects the glass vials.    

N10  TOP  

The Wild N10 Small Engineers' Level is an efficient compact and lightweight instrument, giving highly accurate results under all conditions. It is suitable for general leveling, project studies, route surveys, irrigation works, civil and constructional engineering. When fitted with a glass circle (NK10) it can be used in flat terrain for tacheometric work and for measuring or setting-out horizontal angles. The line of sight is leveled with the aid of a tilting screw and the well known Wild "split-bubble" image system. It has an extremely short minimum focusing distance of 1 meter (3.3 feet), which is most useful.

lt is possible to supply this instrument with an upright image telescope (models N10-E and NK10-E) - a feature often appreciated by those who use their level only occasionally or who find it difficult to work with an inverted image. The E-models have a minimum focusing distance of 1.35 meters (4-5 feet).   

N2  TOP  

The Wild N2 Engineers’ Level is a strongly built, accurate and reliable general purpose instrument, which is easy to operate. It is unsurpassed foe use on civil and constructional engineering projects, bench mark Establishment breaking down primary level networks, profiles, cross-sections, road and railway surveys and for photogrammetric height control. When fitted with a glass circle (NK2) it can be used in flat terrain for setting out works and for measuring horizontal angles and distances. Fine pointing is made with a horizontal clamp and a tangent screw and an accurate coincidence setting of the tubular level split bubble image is made by means of a tilting screw. The telescope and tubular level can rotate simultaneously about the longitudinal axis, enabling the vertical collimation to be checked easily at one instrumental set-up.   

NA2  TOP

The Wild NA2 Automatic Engineers' Level is particularly useful when accurate readings are required quickly. After the circular bubble has been centered carefully, by means of the foot screws, the line of sight is made horizontal automatically through the pendulum type compensator. As a result the NA2 has neither a tubular level nor a tilting screw. Being insensitive to the sun no umbrella is required and this also helps to speed up the leveling. A plane parallel plate micrometer is now available as an optional accessory to the NA2 (and the NAK2, which is identical to the standard model, with the addition of a glass horizontal circle) and this attachment enables an even higher accuracy to be obtained. With it, direct readings to 0.001 ft. or 0.1 mm are made and estimation to 0.0005 ft. or 0.01 mm is possible without difficulty. The micrometer eyepiece is placed most conveniently just above the telescope eyepiece. The reticule differs from the normal type, as one half of the horizontal line has been replaced by two wedge-shaped lines, converging towards the center so that either the chess-board type of staff or one with graduated lines may be used. The telescope gives a bright, contrasting, upright image and the horizontal rotation is friction-braked, with an endless tangent screw for fine pointing.  

N3  TOP

The Wild N3 Precision Level is an outstanding instrument for all first order leveling work. Designed originally for geodetic networks it has been adopted universally as the ideal level for the precise measurement required in dam deformation surveys, industrial installations, aircraft fuselage assemblies and vertical displacement determinations. The plane parallel plate micrometer is mounted in front of the objective lens as a built-in feature of the N3 and is available in metric and non-metric models, giving reliable and simple estimation to 0.01 mm and 0.0005 inch, respectively. The reticule has part of its-horizontal line in the form of two wedge-shaped lines, converging towards the center allowing the staff graduation to be split or straddled, depending on the circumstances and on which part of the cross-hair is used. Collimation errors are corrected by means of a rotation of the objective lens cover glass which enables an exceptionally sensitive, but simple, adjustment to be made. Interchangeable eyepieces provide the possibility of observing with either an inverted or an upright image.    

 

Builders use Wild levels for construction tasks. Homeowners can find reviews of Home Advisor approved builders online for any home construction or renovation project. Customer reviews and information at Home Advisor Reviews helps homeowners pair the right builder with the right job.

Technical Data of Wild Levels (1965)  TOP

 

NK01

N10
NK10

N2
NK2

NA2

N3

 

Beschreibung: Beschreibung: C:\temp\images\NK01_1965.jpg

Beschreibung: Beschreibung: C:\temp\images\NK10_1965.jpg

Beschreibung: Beschreibung: C:\temp\images\N2_1965.jpg

Beschreibung: Beschreibung: C:\temp\images\NA2_1972.jpg

Beschreibung: Beschreibung: C:\temp\images\N3_1965.jpg

Average m.s.e. (standard deviation) in mm per km - double run

±10

±3

±2.0

±1.5

 

(with plane parallel plate micrometer)  

±0.4

±0.2

Average m.s.e. (standard deviation) in ft. per mile - double run

±0.05

±0.012

±0.008

±0.006

 

(with plane parallel plate micrometer)

±0.0016

±0.0008

Telescope magnification

18x

20x

24x or 28x

30x

42x

Stadia multiplication constant 100

100

100

100

100

100

Shortest focussing distance

1.6 m
5.2 ft

1 m
3.3 ft

1.8 m
6 ft

2.2 m
7.2 ft

2 m
6.6 ft

Sensitivity of level bubble per 2 mm

60”

60”

30”