Engineers Dumpy Level

Description

We offer Brunton Compass (Geological Compass) which is available in a leather or wooden case. This compass differs from modern compasses, as it utilizes magnetic induction damping rather than fluid to dampen needle oscillation. It is widely used by geologists and surveyors to make accurate degree and angle.

Specifications :

• The levelling staff of sturdy design that meets the requirements for intensive field work. • The staff material should be one of the following: teak, cypress, kail, aimi, champ, hollock or aluminium alloy. • If timber is used as staff material, then it has well seasoned, sawn in radial direction and free of defects. • The staff is telescopic, comprising three sections without any joint in length. • The top plate made of aluminium, anodised black. • Length 4 m

Accessories

• Circular bubble sensitivity of 25 minutes per 2 mm run. • Carrying case canvas. • Plummet fittings for test and adjustment of bubble.

Description

The Cross-Staff was used at sea from the beginning of the 16th century until the first half of the 18th century. It was used to measure the sun's altitude, especially at the meridian passage. With the knowledge of the sun's declination, the mariner could then obtain his latitude. The staff is original, with the inscription. The cross pieces are replicas. Different cross pieces were used depending on the altitude. A different scale is on each side of the staff.

Description

• 100 braced links. • 2 rings per link. • 0.10 wire. • Cast brass handles. • Adjustable calibration and tally tags at ± 10, 20, 30, 40 and centre on side rings. • Measuring chains with brass handles and arrows 20 m, 30 m, 40 m and 50m.