Patent US3820485A successfully refreshed from Google Patents.
US3820485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern cam follower throw out mechanism for sewing machines
Assignee: Singer Co
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Filing: 1973-05-11
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Granted: 1974-06-28
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Expires: 1993-05-11
Abstract
Abstract A single operator influenced control member is disclosed in a sewing machine together with mechanisms associated therewith for effecting in seriatim an uncoupling of the needle reciprocating drive and elevation of the needle bar, a withdrawal of the pattern cam followers out of tracking relation with the pattern cams, and the setting of a latch device for preventing return of the operator influenced member. The retrograde preventing latch device is released by the ensuing operation of the sewing machine actuating mechanism.
Inventors
- 👤 F Rogers
- 👤 R Bradus
- 👤 E Bruder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:57
CPC Classifications
D; D05; D05B; D05B19/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
In a sewing machine having stitch forming instrumentalities, actuating mechanism for said stitch forming instrumentalities, pattern information carrier means driven by said actuating mechanism, a follower tracking said pattern information carrier means, and operative connections between said follower and said stitch forming instrumentalities, a follower throw-out mechanism comprising a control member shiftably supported on said sewing machine for movement selectivelY between an ineffective extreme position through an intermediate position to an effective extreme position, separable clutch means arranged between said stitch forming instrumentalities and said actuating mechanism, throw-out mechanism for said separable clutch means operative in said intermediate and effective extreme positions of said control member, and a follower retracting mechanism operatively responsive to movement of said control member into said effective extreme position.
Claim 2
Dependent Claim
124 words
In a sewing machine having stitch forming instrumentalities, actuating mechanism for said stitch forming instrumentalities, pattern information carrier means driven by said actuating mechanism, a follower tracking said pattern information carrier means, and operative connections between said follower and said stitch forming instrumentalities, a follower throw-out mechanism comprising a control member shiftably supported on said sewing machine for movement selectivelY between an ineffective extreme position through an intermediate position to an effective extreme position, separable clutch means arranged between said stitch forming instrumentalities and said actuating mechanism, throw-out mechanism for said separable clutch means operative in said intermediate and effective extreme positions of said control member, and a follower retracting mechanism operatively responsive to movement of said control member into said effective extreme position.
Claim 3
Dependent Claim
80 words
In a sewing machine as set forth in claim 1 in which said stitch forming instrumentalities include a reciprocable work penetrating needle and said separable clutch means is arranged between said needle and the actuating mechanism for imparting work penetrating reciprocation to said needle, and in which biasing means is provided for urging said needle out of work penetrating position upon operation of the throw-out mechanism for said separable clutch means prior to the operation of said follower retracting mechanism.
Claim 4
Dependent Claim
72 words
In a sewing machine as set forth in claim 1 in which said pattern information carrier means includes a rotatable pattern cam and in which said follower comprises a lever pivotally supported in said sewing machine for oscillation in response to tracking of said pattern cam in which said throwout mechanism for said separable clutch means becomes effective prior to movement of said follower lever in response to said follower retracting mechanism.
Claim 5
Dependent Claim
46 words
In a sewing machine as set forth in claim 3 in which said pattern information carrier means includes a plurality of rotatable pattern cams arranged coaxially in a stack, and pattern cam selector means arranged on said sewing machine effective independently of said follower throw-out mechanism.
Claim 6
Dependent Claim
23 words
In a sewing machine as set forth in claim 1 including latch means for retaining said control member in said effective extreme position.
Claim 7
Dependent Claim
59 words
In a sewing machine as set forth in claim 5 including spring means biasing said control member toward said ineffective extreme position, and latch release means carried by said sewing machine actuating mechanism and effective upon initiation of actuation of said stitch forming instrumentalities for releasing said latch means which retains said control member in said effective extreme position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |