Geodimeter Model 4A
date: label: date made
content: 1959
notes: label: Description
content: The Model 4 Geodimeter, introduced in the fall of 1958, measured 12 inches square, weighed about 35 lbs. (plus the 12-volt battery and inverter), and had a range of 50 feet to 3 miles. New, it cost less than $5,000. But for those surveyors worried about cost, AGA promised that the initial outlay was "easily returned by the savings gained in just a few projects' use." This example is marked "AGA Geodimeter SYSTEM BERGSTRAND REGISTERED IN U.S. PAT. OFFICE." "System Bergstrand" refers to Erik Bergstrand, the Swedish physicist who developed the science on which the Geodimeter rests. The first two digits of the serial number may indicate that this instrument was made in 1959. The base is marked "X590314" while the power unit is "X590316."
label: Description
content: Ref: AGA, <i>Introducing the Model-4 Geodimeter</i>.
label: Location
content: Currently not on view
place: label: place made
content: Sweden: Stockholm
setName: label: See more items in
content: Medicine and Science: Physical Sciences
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content: Surveying and Geodesy
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content: Measuring & Mapping
publisher: label: Related Publication
content: AGA. Introducing the Model-4 Geodimeter
creditLine: label: Credit Line
content: Richard C. Naegele
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1996.0186.01.02
label: accession number
content: 1996.0186
label: catalog number
content: 1996.0186.01.02
objectType: label: Object Name
content: Electronic Distance Measuring Instrument