US3724282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam and follower release mechanism for sewing machines
Assignee: Singer Co
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Filing: 1971-08-26
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Granted: 1973-04-03
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Expires: 1991-08-26
Abstract
Abstract A manually influenced mechanism for removing the cam followers from tracking relation with a replaceable pattern cam unit in a sewing machine and for dislodging the replaceable pattern cam unit from retention means therefor on a cam shaft to facilitate exchange of pattern cam units.
Inventors
- 👤 L Daman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:40
CPC Classifications
D; D05; D05B; D05B19/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18288; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
In a sewing machine having pattern cam controlled instrumentalities and including an exchangeable pattern cam, a cam accommodating seat with cam retaining means thereon, and cam follower mechanism arranged to track a pattern cam on said seat, operator influenced mechanism for dislodging an exchangeable pattern cam from said cam accommodating seat comprising a manually operating means having a first actuator movable between an at-rest position and a position effective to shift said cam follower into a throw-out position out of tracking relation with an exchangeable pattern cam on said cam accommodating seat, a second actuator operative in seriatim with and while said first actuator is effective to dislodge said exchangeable pattern cam from said cam retaining means on said cam accommodating seat thereby to move said exchangeable pattern cam into a position easily accessible to the operator, latch means for holding said cam follower in the throw-out position influenced by movement of said first actuator out of an at-rest position, and latch release means operated in response to return of said first actuator into said at-rest position.
Claim 2
Dependent Claim
177 words
In a sewing machine having pattern cam controlled instrumentalities and including an exchangeable pattern cam, a cam accommodating seat with cam retaining means thereon, and cam follower mechanism arranged to track a pattern cam on said seat, operator influenced mechanism for dislodging an exchangeable pattern cam from said cam accommodating seat comprising a manually operating means having a first actuator movable between an at-rest position and a position effective to shift said cam follower into a throw-out position out of tracking relation with an exchangeable pattern cam on said cam accommodating seat, a second actuator operative in seriatim with and while said first actuator is effective to dislodge said exchangeable pattern cam from said cam retaining means on said cam accommodating seat thereby to move said exchangeable pattern cam into a position easily accessible to the operator, latch means for holding said cam follower in the throw-out position influenced by movement of said first actuator out of an at-rest position, and latch release means operated in response to return of said first actuator into said at-rest position.
References Cited (Backward Citations)
US3043252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |