Drawing Instrument, Abrams Contour Finder

Description:

The compartments of the wooden case for this instrument include two lenses mounted stereoscopically on a metal handle that attaches to a metal base. They also hold two lights with an electrical cord. These may be mounted over the rod that holds the lenses. Other parts include:

1. A rod with two gauges on it, as well as 2 glass pieces. Both gauges run from -50 to 0 to +50. This is the measuring unit.

2. A pencil arm.

3. A double point, one of which has a lead in it.

4. A sliding clamp.

5. A plastic container with several leads.

6. A paper tag giving the serial number and manufacturer's name. This tag reads in part: Serial No. 327. It also readst: Date AUG 23 1943. It also reads: ABRAMS INSTRUMENT CO. (/) LANSING, MICHIGAN, U.S.A.

An alignment mechanism and a photogrammetric computer, shown as part of the instrument, are not in the present apparatus.

For a related object, see MA.333632.

Reference:

Talbert Abrams, Essentials of Aerial Surveying and Photo Interpretation, New York: McGraw-Hill, 1944.

Date Made: 1943

Maker: Abrams Instrument Corporation

Location: Currently not on view

Place Made: United States: Michigan, Lansing

Subject: MathematicsDrafting, Engineering

Subject:

See more items in: Medicine and Science: Mathematics, Single Drawing Instruments, Science & Mathematics

Exhibition:

Exhibition Location:

Credit Line: Gift of The University of Missouri - Columbia

Data Source: National Museum of American History

Id Number: MA.333631Catalog Number: 333631Accession Number: 300659

Object Name: drawing instrument

Physical Description: wood (case material)cloth (liner material)rubber (cord material)glass (lenses material)metal (rods, smaller cases, circuitry material)paper (tag material)plastic (covers material)Measurements: overall: 7.4 cm x 45.8 cm x 16.6 cm; 2 29/32 in x 18 1/32 in x 6 17/32 in

Guid: http://n2t.net/ark:/65665/ng49ca746aa-ae57-704b-e053-15f76fa0b4fa

Record Id: nmah_1215090

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