General Information

Serial #

WP-58199

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Wood; metal; paper; adhesive; synthetic material.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

17.0 cm

Width

17.0 cm

Height

11.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Mining and Metallurgy

Category

Mineral exploration

Sub-Category

N/A

Manufacturer

AKA

Wallace Tiernan

Country

United States of America

State/Province

New Jersey

City

Belleville

Context

Country

Canada

State/Province

Alberta

Period

Used between the 1950s and the 2000s.

Canada

This artifact was used by Imperial Oil geophysicists to conduct research on the field.

Function

This altimeter was used to measure altitude.

Technical

This artifact was used to quickly measure the altitude of a terrain with graduations reaching hundreds of feet, where a 3-15 feet error range is acceptable. This altimeter was only used to provide ground control points for small and medium-scale photogrammetric mapping and reconnaissance surveys. The movement created by the expansion or the contraction of the atmospheric pressure is read within the instrument through a cogwheel and lever transmission, which is then transferred to an index. This allowed the user to read the elevation directly on a circular scale. Readings can be taken from up to 75 000 feet in altitude and from two different scales, the inner one featuring graduations from 500 to 3900 and the exterior one from 3900 to 7500. Wallace & Tiernan altimeters are shock-resistant through the incorporation of jeweled bearings and feature individual graduations on the scale.

Area Notes

Unknown

Details

Markings

Lettering on bottom dial reads: “ALTITUDE/HUNDRED FEET/ZERO EQUALS – 1000 FT. PER/S. M. TABLE 51/SERIAL NO.WP – 58199/MODEL NO. FA112/WALLACE & TIERNAN/BELLEVILLE, NEW JERSEY/[grading from 0 to 70 around the perimeter of the dial]”; lettering on top dial reads: “AIR TEMP. AND RELATIVE HUMIDITY CORRECTION FACTOR FOR ALTITURE/MULTIPLY BY/[graphic with numbers]/HUMIDITY/AIR TEMP. DEG. F./INCHES/MILLIBARS/FT. ALTITUDE S.M.T. 51/ZERO = - 1000 FT./[multiple graphics with numbers]/TEMP. CORRECTION PER DEG. F. ABOVE OR BELOW 75˚F./ABOVE 75˚F. ADD CORRECTION ALGEBRAICALLY, BELOW 75˚ SUBSTRACT/CORRECTION/FEET PER DEG. F./SERIAL/NO./WP 58199/INSTURMENT SCALE – FEET/FORM 2168”; lettering on sticker on glass pane reads: “ACCEPTED/by/H”.

Missing

The artefact appears complete.

Finish

Predominantly grey painted wood; clear glass pane with black outline; grey and silver coloured metal hardware; beige paper with black lettering; beige and green sticker; yellow-ish translucent synthetic strap.

Decoration

No decoration.