US3815529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual needle elevating device
Assignee: Singer Co
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Filing: 1973-04-04
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Granted: 1974-06-11
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Expires: 1993-04-04
Abstract
Abstract A mechanism in a zigzag sewing machine having a basting stitch device which operates by unlatching a needle bar from an endwise reciprocatory drive means during an extreme excursion of a needle bar gate carrying the needle bar. A latch release member, positioned adjacent the needle bar gate, may be manually elevated to a position where it will strike a lever mounted on the latch mechanism which will trip the latch mechanism at any position of the needle bar gate. A presser bar lifting lever, when elevated to a position beyond normal lift position, will lift a presser bar guide block to a position where it will strike a lug extension on the latch release member, thereby causing elevation of the latch release member to disconnect the needle bar from its endwise reciprocatory driving mechanism. A tension spring will elevate the needle bar to its upper most position when the needle bar is thus disconnected from its driving mechanism.
Inventors
- 👤 K Adams
- 👤 J Brockman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:22
CPC Classifications
D; D05; D05B; D05B81/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
In a sewing machine having a frame, a needle bar carried for endwise reciprocation in said frame, a driving mechanism for effecting endwise reciprocation of said needle bar, a latch mechanism arranged between said needle bar and said driving mechanism for selectively disconnecting said driving mechanism from said needle bar, the improvement comprising a latch release member shiftably supported on said sewing machine frame for movement alternatively into and out of a position for releasing said latch mechanism, a tension spring arranged to act upwardly on said needle bar, means responsive to movement of said latch release member into position for releasing said latch mechanism for increasing the tension in said spring, and abutment means carried on said sewing machine frame for limiting the uppermost position of said needle bar.
Claim 2
Dependent Claim
130 words
In a sewing machine having a frame, a needle bar carried for endwise reciprocation in said frame, a driving mechanism for effecting endwise reciprocation of said needle bar, a latch mechanism arranged between said needle bar and said driving mechanism for selectively disconnecting said driving mechanism from said needle bar, the improvement comprising a latch release member shiftably supported on said sewing machine frame for movement alternatively into and out of a position for releasing said latch mechanism, a tension spring arranged to act upwardly on said needle bar, means responsive to movement of said latch release member into position for releasing said latch mechanism for increasing the tension in said spring, and abutment means carried on said sewing machine frame for limiting the uppermost position of said needle bar.
Claim 3
Dependent Claim
75 words
In a sewing machine as set forth in claim 1 in which said spring is attached to said needle bar and to said latch release member so that movement of said latch release member into a position for releasing said latch mechanism increases the tension in said spring thus biasing said needle bar upwardly with increased force and also biasing said latch release member in a direction out of position for releasing said latch mechanism.
Claim 4
Dependent Claim
70 words
In a sewing machine as set forth in claim 2 in which said latch release member is arranged in said sewing machine frame closely adjacent to the path of reciprocation of said needle bar, and in which said latch release member includes a projection protruding exteriorly of said sewing machine frame and formed with a finger grip for operator influence in selectively disconnecting said driving mechanism from said needle bar.
Claim 5
Dependent Claim
200 words
In a zigzag sewing machine having a frame, a needle bar carried for endwise reciprocation and sideways oscillation in said frame, a driving mechanism for effecting endwise reciprocation of said needle bar, a latch mechanism arranged between said needle bar and said driving mechanism for selectively disconnecting said driving mechanism from said needle bar, means including a pattern information cam for selectively disconnecting said mechanism from said needle bar for the formation of basting stitches, a presser foot and a presser foot lifting mechanism; wherein the improvement comprises a latch release member shiftably supported on said sewing machine frame for movement alternatively into and out of a position for releasing said latch mechanism, said latch release member including a projection protruding exteriorly of said sewing machine frame and formed with a finger grip for operator influence in selectively disconnecting said driving mechanism from said needle bar, said latch release member also including a lug extension arranged for cooperation with said presser foot lifting mechanism for movement of said latch release member into a position for releasing said latch mechanism upon elevation of said presser foot by said presser foot lifting mechanism into a predetermined elevated position of said presser foot.
Claim 6
Dependent Claim
200 words
In a zigzag sewing machine having a frame, a needle bar carried for endwise reciprocation and sideways oscillation in said frame, a driving mechanism for effecting endwise reciprocation of said needle bar, a latch mechanism arranged between said needle bar and said driving mechanism for selectively disconnecting said driving mechanism from said needle bar, means including a pattern information cam for selectively disconnecting said mechanism from said needle bar for the formation of basting stitches, a presser foot and a presser foot lifting mechanism; wherein the improvement comprises a latch release member shiftably supported on said sewing machine frame for movement alternatively into and out of a position for releasing said latch mechanism, said latch release member including a projection protruding exteriorly of said sewing machine frame and formed with a finger grip for operator influence in selectively disconnecting said driving mechanism from said needle bar, said latch release member also including a lug extension arranged for cooperation with said presser foot lifting mechanism for movement of said latch release member into a position for releasing said latch mechanism upon elevation of said presser foot by said presser foot lifting mechanism into a predetermined elevated position of said presser foot.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |