|
gptkbp:instance_of
|
gptkb:chronograph
|
|
gptkbp:academic_programs
|
innovative
|
|
gptkbp:awarded_for
|
£20 prize
|
|
gptkbp:developed_by
|
gptkb:18th_century
|
|
gptkbp:final_model_completion
|
1761
|
|
gptkbp:first_successful_model
|
H4
|
|
gptkbp:funding
|
gptkb:Board_of_Longitude
|
|
gptkbp:h1
|
first model
|
|
gptkbp:h2
|
second model
|
|
gptkbp:h3
|
third model
|
|
gptkbp:h4
|
fourth model
|
|
gptkbp:h4's_accuracy_test
|
passed
|
|
gptkbp:h4's_design_feature
|
circular case
|
|
gptkbp:h4's_dimensions
|
30 cm in diameter
|
|
gptkbp:h4's_escapement_type
|
gptkb:grasshopper_escapement
|
|
gptkbp:h4's_historical_significance
|
first reliable marine timekeeper
|
|
gptkbp:h4's_power_source
|
mainspring
|
|
gptkbp:h4's_temperature_compensation
|
yes
|
|
gptkbp:h4's_testing_duration
|
over 30 days
|
|
gptkbp:h4's_testing_location
|
gptkb:Jamaica
|
|
gptkbp:h4's_weight
|
approximately 1.5 kg
|
|
gptkbp:h4's_winding_mechanism
|
keyless winding
|
|
gptkbp:harrison's_awards
|
grants from the British government
|
|
gptkbp:harrison's_contribution
|
advancements in horology
|
|
gptkbp:harrison's_first_model
|
gptkb:H1
|
|
gptkbp:harrison's_fourth_model
|
H4
|
|
gptkbp:harrison's_impact
|
on navigation and exploration
|
|
gptkbp:harrison's_motivation
|
solving the longitude problem
|
|
gptkbp:harrison's_recognition
|
posthumous acclaim
|
|
gptkbp:harrison's_second_model
|
H2
|
|
gptkbp:harrison's_third_model
|
H3
|
|
gptkbp:has_legacy
|
influenced future timekeeping inventions
|
|
gptkbp:historical_significance
|
critical for exploration
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Harrison's marine timekeepers
|
|
gptkbp:influence
|
gptkb:navigation_system
|
|
gptkbp:inspired
|
future developments in timekeeping
|
|
gptkbp:invention
|
gptkb:John_Harrison_XX
not patented
|
|
gptkbp:john_harrison's_profession
|
gptkb:clock_tower
|
|
gptkbp:legacy
|
foundation of modern chronometry
|
|
gptkbp:material
|
brass
|
|
gptkbp:mechanism_of_action
|
gptkb:Pendulum
|
|
gptkbp:model
|
four main models
|
|
gptkbp:performance
|
within one second per day
|
|
gptkbp:reign
|
maritime navigation
|
|
gptkbp:significance
|
solved the problem of longitude
|
|
gptkbp:timekeeping_precision
|
highly precise
|
|
gptkbp:used_by
|
gptkb:naval_warfare
|
|
gptkbp:used_for
|
determining longitude at sea
|
|
gptkbp:bfsParent
|
gptkb:John_Harrison_XIII
|
|
gptkbp:bfsLayer
|
5
|