US3745950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electric sewing machine
Assignee: Individual
•
Filing: 1972-03-15
•
Granted: 1973-07-17
•
Expires: 1992-03-15
Abstract
Abstract A portable electric sewing machine is provided which comprises an elongated casing containing therein an electric motor and its driving power source. The rotary power of the motor is converted through a sewing needle operating mechanism to up-down reciprocal movement of a sewing needle and is transmitted through a cam assembly to a toothed member and a swing member to move them in snychronization with the needle operating mechanism.
Inventors
- 👤 T Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:13
CPC Classifications
D; D05; D05B; D05B73/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
A portable electric sewing machine comprising in combination: a casing having an elongated handle portion housing an electric motor and its driving power source, and a head portion contiguous to said handle portion and provided with a sliding plate, said casing containing a vertical fixed wall below said sliding plate; a sewing needle operating mechanism driven by said electric motor to let the sewing needle reciprocate in the direction perpendicular to said sliding plate; a cam assembly consisting of a first and a second cam which are formed integral with each other and arranged rotatable in response to said sewing needle operating mechanism; a toothed member having a face formed with an elongated recession designed to receive therein a protuberance on sai vertical fixed wall and a hole designed to said therein said first cam, and a face in which teeth are formed, said both faces meeting at right angles to each other; a swing member provided with a hook, said member being pivotally mounted on said vertical fixed wall to be swung by said second cam; and a presser foot mechanism for elastically pressing an article to be sewn on said sliding plate.
Claim 2
Dependent Claim
194 words
A portable electric sewing machine comprising in combination: a casing having an elongated handle portion housing an electric motor and its driving power source, and a head portion contiguous to said handle portion and provided with a sliding plate, said casing containing a vertical fixed wall below said sliding plate; a sewing needle operating mechanism driven by said electric motor to let the sewing needle reciprocate in the direction perpendicular to said sliding plate; a cam assembly consisting of a first and a second cam which are formed integral with each other and arranged rotatable in response to said sewing needle operating mechanism; a toothed member having a face formed with an elongated recession designed to receive therein a protuberance on sai vertical fixed wall and a hole designed to said therein said first cam, and a face in which teeth are formed, said both faces meeting at right angles to each other; a swing member provided with a hook, said member being pivotally mounted on said vertical fixed wall to be swung by said second cam; and a presser foot mechanism for elastically pressing an article to be sewn on said sliding plate.
Claim 3
Dependent Claim
42 words
A portable electric sewing machine according to claim 1, in which said sewing needle operating mechanism comprises a gear train including a gear of which the toothed periphery is partially exposed to the outside from a vertical slit formed in the casing.
Claim 4
Dependent Claim
20 words
A portable electric sewing machine according to claim 1, in which said toothed member is formed of self-lubricant synthetic resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |