Altimeter

Forestry

Accession Number: 2017.for.5

Instrument Name: Altimeter

Description:

This altimeter has a leather satchel-like case with a long strap so it can be worn over the shoulder. The instrument has a moulded flat-surfaced metal body with a curved top and a protruding base enabling easy hand-holding. Mounted on the curved top are two sights, one at each end of the curve. The sight on the right is narrower, the one on the left broader. The body of the instrument has a long window opening, with a scale marked in percent visible and an indicator needle that moves as the altimeter is tilted.

On one edge of the instrument, beneath the larger sight and at the end of the scale, there is a round screw adjuster with ridged edges. Beneath this, close to the handle, there is a metal ball, like a bearing, protruding slightly from the body of the instrument. Near this, on the flat surface there is a small protruding cylindrical pin.

Screws, visible on the reverse side, hold the two halves of the altimeter together.

Alternative Name: Clinometer

Primary Materials: Metal

Markings:

Directly below the scale: “Haga”
Below this: “Germany”

On the flap of the leather case, pressed/cut into the leather: “UT – F13″
On the clip of the leather case: “Original TUCK-TITE”
Inside the flap of the case, written in pen: “UT-F13 (R)”
Inside the flap of the case, printed in ink: “Made in Germany”

Dimensions (cm): 18cm x 18cm x 4cm

Function:

To enable the quick calculation of the height of a tall object, such as a tree, given a known distance from the vertical base of the object. This clinometer functions by tilting to look through the sights at the top of the object and depressing the protruding cylindrical pin near the handle. This fixes the indicator needle in place pointing at the scale, from which the height can be calculated.

The adjusting wheel at the front of the scale enables the scale to be adjusted to reflect the appropriate distance from the object being measured.

Condition:

Instrument: Very Good. There is slight wear on the pin near the handle.
Case: Poor. The stitching on the case has come apart in places. The case is very worn, particularly around the edges.

Manufacturer:

Instrument: Haga, Germany; Case: Original Tuck-Tite

Date of Manufacture: c. 1950s

Provenance:

Department of Forestry. This clinometer was used by undergraduate students in the field.

Additional Information and References:

This design has been made, almost unchanged, by Haga since the 1950s. However, the case, by Tuck-Tite dates the altimeter to the 1950s.

Donated to UTSIC: No