Maker

Carl Zeiss, Oberkochen, Germany

Model

Target Rod for Zeiss Th2 Theodolite

Serial Number

69390

Dimensions

Target: 48 mm diameter, 327 mm high (without bridge)

Bridge: 126 mm long x 55 mm wide x 50 mm high

Image

Description

This target rod is designed for mounting on top of a theodolite Zeiss (Oberkochen) Th2. The rod has a sleeve that allows the light bulb to be covered by a red or green film. For precise pointing, the rod carries a white cone at the top, pointing downwards. This cone can be illuminated by the light bulb (with colour filters deactivated). The rod carries a cylindrical battery compartment at the bottom (for one D-cell battery) and an on/off switch. The centring cylinder at the bottom fits into the centring device on top of the bridge. This bridge for the target rod can be attached to the standards of the Th2 theodolite with two screws.

Bridge for target rod: Ordering Number 706722. Target rod with container: Ordering Number 706804 (from Zeiss Catalogue Hz V/69 70-100d (1969)

History & comments

pre 1969. Bridge labelled T94 South Pylon. Used by APH Werner for his surveys of the Sydney Harbour Bridge and Opera House. Numbered 166.

Conservation

In leather case: 56 mm diameter, 345 mm long

Condition

Some scratches to paint.

Remarks

Mentioned in Zeiss Catalogue 'Surveying Instruments', 70-100-e (Cat No. 706804 for sighting bar in case, Cat No. 706722 for support (on Th 2 theodolite)).

Dates

Catalogued in 2011 by JMR. Photo by JMR.