Thacher's Calculating Instrument
GPTKB entity
Statements (20)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
calculator
|
| gptkbp:displayedAt |
gptkb:Smithsonian_National_Museum_of_American_History
|
| https://www.w3.org/2000/01/rdf-schema#label |
Thacher's Calculating Instrument
|
| gptkbp:introduced |
1881
|
| gptkbp:inventedBy |
gptkb:Edwin_Thacher
|
| gptkbp:length |
30 inches
|
| gptkbp:manufacturer |
gptkb:Keuffel_&_Esser
|
| gptkbp:marketedIn |
gptkb:United_States
|
| gptkbp:material |
brass
paper scales |
| gptkbp:patent |
1881
|
| gptkbp:size |
60 feet
|
| gptkbp:type |
cylindrical slide rule
|
| gptkbp:usedFor |
gptkb:division
engineering mathematical calculations multiplication logarithms |
| gptkbp:bfsParent |
gptkb:Edwin_Thacher
|
| gptkbp:bfsLayer |
7
|