Harrison's marine timekeepers

URI: https://gptkb.org/entity/Harrison's_marine_timekeepers
GPTKB entity
Statements (30)
Predicate Object
gptkbp:instanceOf marine chronometer
gptkbp:awardedBy gptkb:Board_of_Longitude
gptkbp:date_of_first_model 1735
gptkbp:displayedAt gptkb:National_Maritime_Museum,_Greenwich
gptkbp:fifth_model H5
gptkbp:firstModel gptkb:H1
gptkbp:fourth_model H4
gptkbp:H1_dimensions approx. 1m x 0.5m x 0.5m
gptkbp:H1_type gptkb:castle
gptkbp:H1_weight 34 kg
gptkbp:H4_completed 1759
gptkbp:H4_type gptkb:wristwatch
gptkbp:H4_won_longitude_prize true
https://www.w3.org/2000/01/rdf-schema#label Harrison's marine timekeepers
gptkbp:influenced development of marine chronometers
gptkbp:inventedBy gptkb:John_Harrison
gptkbp:location_of_original_models gptkb:Royal_Observatory,_Greenwich
gptkbp:material brass
wood
gptkbp:notableModel H4
gptkbp:purpose solving the longitude problem
gptkbp:second_model H2
gptkbp:significance enabled accurate determination of longitude at sea
gptkbp:technology bimetallic strip
grasshopper escapement
remontoire
gptkbp:third_model H3
gptkbp:bfsParent gptkb:National_Maritime_Museum,_Greenwich
gptkb:National_Maritime_Museum_collection
gptkbp:bfsLayer 7