Singer Featherweight 221
E606622
The Singer Featherweight 221 is a compact, portable, and highly collectible vintage sewing machine renowned for its smooth stitch quality and durable construction.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Singer Featherweight 221 canonical | 1 |
| Singer Featherweight 222K | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6628627 — 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: Singer Featherweight 221 Context triple: [Singer Sewing Machine Company, notableProduct, Singer Featherweight 221]
-
A.
Bluebird K7
Bluebird K7 was a jet-powered hydroplane famously used by Donald Campbell in the 1950s and 1960s to set multiple world water speed records.
-
B.
Thinline
Thinline is a slim, portable book format commonly used for Bibles that reduces bulk while retaining the full text.
-
C.
Bantam
Bantam is the main inhabited village and administrative center of the remote Australian territory of the Cocos (Keeling) Islands in the Indian Ocean.
-
D.
Bantam
Bantam is a major American publishing imprint best known for its mass-market paperback books across a wide range of genres.
-
E.
Bantam
Bantam is a small borough within the town of Litchfield in northwestern Connecticut, known for its village character and proximity to Bantam Lake.
- 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: Singer Featherweight 221 Target entity description: The Singer Featherweight 221 is a compact, portable, and highly collectible vintage sewing machine renowned for its smooth stitch quality and durable construction.
-
A.
Bluebird K7
Bluebird K7 was a jet-powered hydroplane famously used by Donald Campbell in the 1950s and 1960s to set multiple world water speed records.
-
B.
Thinline
Thinline is a slim, portable book format commonly used for Bibles that reduces bulk while retaining the full text.
-
C.
Bantam
Bantam is a major American publishing imprint best known for its mass-market paperback books across a wide range of genres.
-
D.
Bantam
Bantam is the main inhabited village and administrative center of the remote Australian territory of the Cocos (Keeling) Islands in the Indian Ocean.
-
E.
Bantam
Bantam is a small borough within the town of Litchfield in northwestern Connecticut, known for its village character and proximity to Bantam Lake.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
portable sewing machine
ⓘ
vintage sewing machine ⓘ |
| alsoKnownAs |
Featherweight 221
ⓘ
Singer 221 ⓘ |
| bedType | flat bed ⓘ |
| bobbinSystem | rotary hook ⓘ |
| collectibleStatus | highly collectible ⓘ |
| compatibleWith |
Class 221 bobbins
ⓘ
low-shank sewing machine feet ⓘ |
| construction | all-metal internal parts ⓘ |
| constructionQuality | high ⓘ |
| controlType | foot pedal ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| designedFor |
home sewing
ⓘ
portable use ⓘ |
| driveType | mechanical ⓘ |
| era | mid-20th century ⓘ |
| feature |
belt-driven motor
ⓘ
front-mounted tension assembly ⓘ lightweight construction ⓘ low-shank presser foot system ⓘ portable carrying case ⓘ removable extension bed ⓘ |
| feedSystem | drop feed dogs ⓘ |
| finish | black enamel with gold decals ⓘ |
| hasVariant |
Singer Featherweight 222K
ⓘ
linked to:
Singer Featherweight 221
|
| introducedInYear | 1933 ⓘ |
| maintenance | user-oilable ⓘ |
| manufacturer | Singer Manufacturing Company ⓘ |
| marketedAs | Featherweight ⓘ |
| material | cast aluminum ⓘ |
| mechanism | oscillating hook ⓘ |
| needleSystem | 15x1 / 2020 household needles ⓘ |
| notableFor |
collectibility
ⓘ
durable construction ⓘ smooth stitch quality ⓘ |
| powerSource | electric motor ⓘ |
| productionStartYear | 1933 ⓘ |
| stitchQuality | high ⓘ |
| stitchType | straight stitch ⓘ |
| targetMarket | domestic sewing market ⓘ |
| transport | fitted wooden or fiberboard case ⓘ |
| typicalColor | black ⓘ |
| typicalUse | piecing quilt tops ⓘ |
| weightApprox | 11 pounds ⓘ |
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: Singer Featherweight 221 Description of subject: The Singer Featherweight 221 is a compact, portable, and highly collectible vintage sewing machine renowned for its smooth stitch quality and durable construction.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Singer Featherweight 221