Maker

Kern & Co, Aarau, Switzerland

Model

Tilting Plate Trivet

Serial Number

none

Dimensions

133 x 135 x 75 mm

Image

Description

Trivets are used to set up surveying instruments on pillars where the centre is marked with a simple mark. This trivet features the KERN tilting plate mechanism on top and a centring needle below. The latter can be lowered onto the mark with a spring loaded lever for centring purposes.

The tilting plate features two small tubular levels and three clamps that allow the levelling and locking of the plate.

The centre of the plate has a male thread (about 16 mm diameter) for the attachment of matching KERN instruments or centring plates.

Because the levelling screws of KERN theodolites (such as the DKM1, DKM2 and DKM3) have a limited range, the prelevelling of the trivet top is essential.

History & comments

pre 1970. The wooden box carries the label "Kern Aarau Schweiz Suisse Switzerland Suiza". '90.' is engraved. Delivery label '475' 'V3114 Melbourne'.

Conservation

In wooden box (182 mm x 120 mm x 177 mm) . The box has a leather carrying strap and two locks.

Condition

Painted and metal surfaces in excellent condition.

Remarks

See 0242 for details of the centring plate that must be attached to the trivet before theodolites/targets can be attached.

Dates

Catalogued in 2008 by JMR. Photo by JMR.