US3955518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt tensioning mechanism for tiltable sewing machines
Assignee: Singer Co
•
Filing: 1975-08-11
•
Granted: 1976-05-11
•
Expires: 1995-08-11
Abstract
Abstract This disclosure relates to the combination of a sewing machine and a work table wherein the sewing machine is supported in the work table for movement between a sewing position and a tilted position, a drive motor supported remote from the driven mechanism of the machine and an idler pulley supported intermediate the drive motor and the machine with the idler pulley drivingly connecting the machine with the drive motor by means of drive belts, and the idler pulley being supported for movement with the sewing machine during tilting thereof in a manner whereby the tension in the drive belts is relieved during tilting of the sewing machine and tension is restored during return movement of the sewing machine to the sewing position.
Inventors
- 👤 Santi Riccardo Giocolano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:29
CPC Classifications
D; D05; D05B; D05B75/00; D05B75/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
The combination of a sewing machine and a work table comprising, a work table, a sewing machine including a frame supported in said work table for movement between a sewing position wherein the work surface of the machine is substantially parallel to the table surface and a tilted position wherein the work surface of the machine is tilted away from the table surface, a drive motor supported remote from the machine, an idler pulley supported between said drive motor and said machine for operably connecting said drive motor to said machine for driving the sewing elements of said machine, a first belt operably connecting said drive motor to said idler pulley, a second belt operably connecting said idler pulley to said machine, and said idler pulley being supported for movement in a fixed path relative to said drive motor and said machine with said fixed path being such that during tilting of said sewing machine the movement of said idler pulley will be such that the effective distance between said idler pulley and said drive motor and said sewing machine will decrease whereby the tension on said first and second belts will be relieved.
Claim 2
Dependent Claim
194 words
The combination of a sewing machine and a work table comprising, a work table, a sewing machine including a frame supported in said work table for movement between a sewing position wherein the work surface of the machine is substantially parallel to the table surface and a tilted position wherein the work surface of the machine is tilted away from the table surface, a drive motor supported remote from the machine, an idler pulley supported between said drive motor and said machine for operably connecting said drive motor to said machine for driving the sewing elements of said machine, a first belt operably connecting said drive motor to said idler pulley, a second belt operably connecting said idler pulley to said machine, and said idler pulley being supported for movement in a fixed path relative to said drive motor and said machine with said fixed path being such that during tilting of said sewing machine the movement of said idler pulley will be such that the effective distance between said idler pulley and said drive motor and said sewing machine will decrease whereby the tension on said first and second belts will be relieved.
Claim 3
Dependent Claim
66 words
The combination as set forth in claim 1 wherein said idler pulley is supported for rotation and movement relative to a supporting frame, said frame including a curved slot in which said idler pulley is disposed, and said curve slot having a radius of curvature whose axis is offset with respect to the axis of said drive motor and a driven element on said sewing machine.
Claim 4
Dependent Claim
49 words
The combination as set forth in claim 2 further comprising a locking arm detachably secured at one end thereof to said sewing machine frame, said locking arm supporting said pulley for movement therewith in response to tilting of the sewing machine between the sewing position and the tilted position.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |