US Patent: 1,219,430 - Instrument for Use in Topography


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US Patent: 1,219,430

Instrument for Use in Topography

Patentee:

Alfred W. Bjornstad (exact or similar names) - Fort Leavenworth, KS

USPTO Classifications:

188/243, 33/375, 33/402, 33/799

Tool Categories:

layout tools : calipers

Assignees:

None

Manufacturer:

Unknown

Witnesses:

Edwin J. Beller

R. J. MacKinney

Patent Dates:
Applied:	Apr. 13, 1916
Granted:	Mar. 20, 1917

Patent Pictures: [ 1 | 2 ]

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Description:

Designed to provide a direct reading of the true slope or angle of the actual ground which the relief map represents when the the vertical and horizontal scales are different from each other.

Known example marked: PAT MCH.20.1917/GRADUATED FOR/B-H RELIEF MAP