sun-and-planet gear
E594625
The sun-and-planet gear is a mechanical gearing system used in early steam engines to convert reciprocating motion into rotary motion, enabling continuous rotation without a traditional crank.
All labels observed (1)
| Label | Occurrences |
|---|---|
| sun-and-planet gear canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6454862 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: sun-and-planet gear Context triple: [William Murdoch, notableInvention, sun-and-planet gear]
-
A.
Sphere of the Sun
The Sphere of the Sun is the fourth celestial heaven in Dante Alighieri’s Paradiso, where the poet encounters the radiant souls of great theologians and philosophers who embody divine wisdom.
-
B.
Sun, Moon & Stars
"Sun, Moon & Stars" is a track from the album *True Magic* by American rapper and producer Mos Def.
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C.
Sprocket
Sprocket is the costumed raccoon mascot of the Rocket City Trash Pandas minor league baseball team, known for his playful, space-themed antics at games and events.
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D.
Edmunds’ planet
Edmunds’ planet is a potentially habitable exoplanet in the film "Interstellar," identified as a candidate world for humanity’s survival and colonization.
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E.
SUN
SUN is the Australian Securities Exchange (ASX) ticker symbol for Suncorp Group, a major Australian finance, insurance, and banking corporation.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: sun-and-planet gear Target entity description: The sun-and-planet gear is a mechanical gearing system used in early steam engines to convert reciprocating motion into rotary motion, enabling continuous rotation without a traditional crank.
-
A.
Sphere of the Sun
The Sphere of the Sun is the fourth celestial heaven in Dante Alighieri’s Paradiso, where the poet encounters the radiant souls of great theologians and philosophers who embody divine wisdom.
-
B.
Sun, Moon & Stars
"Sun, Moon & Stars" is a track from the album *True Magic* by American rapper and producer Mos Def.
-
C.
Sprocket
Sprocket is the costumed raccoon mascot of the Rocket City Trash Pandas minor league baseball team, known for his playful, space-themed antics at games and events.
-
D.
Edmunds’ planet
Edmunds’ planet is a potentially habitable exoplanet in the film "Interstellar," identified as a candidate world for humanity’s survival and colonization.
-
E.
SUN
SUN is the Australian Securities Exchange (ASX) ticker symbol for Suncorp Group, a major Australian finance, insurance, and banking corporation.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
mechanical gearing system
ⓘ
mechanism ⓘ steam engine component ⓘ |
| advantage |
avoids use of a crank
ⓘ
provides continuous rotation from a beam engine ⓘ |
| alternativeTo | crank mechanism ⓘ |
| application |
beam engines
ⓘ
rotative steam engines ⓘ |
| associatedWith |
James Watt
NERFINISHED
ⓘ
Matthew Boulton NERFINISHED ⓘ |
| belongsTo | epicyclic gear train family ⓘ |
| category |
historical engineering mechanism
ⓘ
power transmission device ⓘ |
| converts | reciprocating motion to rotary motion ⓘ |
| designGoal | circumvent crank patents ⓘ |
| developedFor | steam engine power transmission ⓘ |
| effect | increases rotational speed relative to beam motion ⓘ |
| enables | continuous rotation ⓘ |
| eraOfUse |
early 19th century
ⓘ
late 18th century ⓘ |
| field |
history of technology
ⓘ
mechanical engineering ⓘ |
| gearType | external gear system ⓘ |
| hasComponent |
driven shaft
ⓘ
driving shaft ⓘ gear arm ⓘ planet gear ⓘ sun gear ⓘ |
| hasConfiguration |
planet gear mounted on a rotating arm
ⓘ
sun gear fixed to output shaft ⓘ |
| hasMotionPath | planet gear orbits sun gear ⓘ |
| historicalUse | Boulton and Watt steam engines NERFINISHED ⓘ |
| kinematicRole |
changes direction of motion
ⓘ
converts oscillatory motion to unidirectional rotation ⓘ transmits torque ⓘ |
| mechanicalPrinciple | epicyclic gearing ⓘ |
| motionTypeInput | reciprocating motion ⓘ |
| motionTypeOutput | rotary motion ⓘ |
| operatesBy | planet gear revolving around sun gear ⓘ |
| replacedBy | crankshaft mechanism ⓘ |
| requires | meshing gear teeth ⓘ |
| usedFor | driving machinery from steam engines ⓘ |
| usedIn | early steam engines ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: sun-and-planet gear Description of subject: The sun-and-planet gear is a mechanical gearing system used in early steam engines to convert reciprocating motion into rotary motion, enabling continuous rotation without a traditional crank.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.