Patent US3763806A successfully refreshed from Google Patents.
US3763806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separately retractable paired needles
Assignee: C AND W SEWING MACHINE
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Filing: 1972-10-16
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Granted: 1973-10-09
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Expires: 1992-10-16
Abstract
Abstract In a preferred embodiment of the present invention, a paired sewing machine paired needle structure includes separately retractable needles lockable in the extended position as well as lockable in the retracted position, for the turning of corners during the sewing operation, the extendable and retractable shaft of each needle or mounting structure therefor having, in addition to the locking and unlocking projection arm and spring-biased locking-unlocking head on the arm, a separate guide projection extendable through a separate slot from the locking and unlocking projection arm and at about right angles thereto, thereby providing improved sturdiness and longivity and precision in operation thereof, the guide projection being threaded as a male member and the respective needle mounting structure having a female threaded aperture extending through to the needle mounting channel whereby the tightening of the guide projection is lockable of the respective needle into its needle mounting structure, and the guide projection aperture being located along the needly longitudinal axis of the needle structure at a point in non-alinement with the locking projection arm whereby cracking of the needle mounting structure by tightening of the guide projection and/or by the screw mounting of the locking projection arm is avoided.
Inventors
- 👤 J Shuffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:50
CPC Classifications
D; D05; D05B; D05B55/00; D05B55/14; D05B55/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
334 words
A parallel retractable-needles device comprising in combination: rigid casing means having inner walls defining a semi-enclosure space, said casing means having a pRoximal end and a distal end and being elongated along a longitudinal axis extending between said proximal end and said distal end, and said casing means having an upper face and opposite side faces on either side of the upper face, in the upper face there being paired separate about parallel first and second through-slots communicating with the space and the slots being spaced from one another a predetermined distance and the paired slots each extending about parallel to said longitudinal axis, and additional third and fourth through-slots communicating with said space, one additional slot being in one side face and the other being in the other opposite side face, the proximal end having first paired first and second channel-structures dividedly defining channels and laterally spaced from one another said predetermined distance, and the distal end having first paired first and second through-apertures communicating with the space and laterally-spaced from one another and the said paired apertures being opposite from said paired channel structures, said first and second through-apertures being spaced said predetermined distance; and paired elongated shaft needle means including two separate first and second needle slide structures mounted within the space about parallel to each other, and about parallel with said longitudinal axis, the first needle structure extendable through the first channel and first aperture and having a guide threadedly mounted projection extending through one of said first slot and said third slot and having a slide structure-locking and unlocking projection means extending through the other of said first slot and said third slot, and the other second needle structure extendable through the second channel and second aperture and having a guide threadedly mounted projection extending through one of said second and fourth slots and having a slide structure-locking and unlocking projection means extending through the other of said second and fourth slots, each guide projection being a needle lock.
Claim 2
Dependent Claim
334 words
A parallel retractable-needles device comprising in combination: rigid casing means having inner walls defining a semi-enclosure space, said casing means having a pRoximal end and a distal end and being elongated along a longitudinal axis extending between said proximal end and said distal end, and said casing means having an upper face and opposite side faces on either side of the upper face, in the upper face there being paired separate about parallel first and second through-slots communicating with the space and the slots being spaced from one another a predetermined distance and the paired slots each extending about parallel to said longitudinal axis, and additional third and fourth through-slots communicating with said space, one additional slot being in one side face and the other being in the other opposite side face, the proximal end having first paired first and second channel-structures dividedly defining channels and laterally spaced from one another said predetermined distance, and the distal end having first paired first and second through-apertures communicating with the space and laterally-spaced from one another and the said paired apertures being opposite from said paired channel structures, said first and second through-apertures being spaced said predetermined distance; and paired elongated shaft needle means including two separate first and second needle slide structures mounted within the space about parallel to each other, and about parallel with said longitudinal axis, the first needle structure extendable through the first channel and first aperture and having a guide threadedly mounted projection extending through one of said first slot and said third slot and having a slide structure-locking and unlocking projection means extending through the other of said first slot and said third slot, and the other second needle structure extendable through the second channel and second aperture and having a guide threadedly mounted projection extending through one of said second and fourth slots and having a slide structure-locking and unlocking projection means extending through the other of said second and fourth slots, each guide projection being a needle lock.
Claim 3
Dependent Claim
70 words
A parallel retractable-needles device of claim 1, in which said first needle structure''s locking and unlocking means and in which said second needle structure''s locking and unlocking means each is lockable of the respective slide structure at each of needle-extended position when the respective needle structure is extended through the first or second aperture and needle-retracted position when the respective needle structure is retracted within the first or second channel.
Claim 4
Dependent Claim
36 words
A parallel retractable-needles device of claim 2, in which said first needle structure threaded guide projection extends through said first slot and in which said second needle structure''s threaded guide projection extends through said second slot.
Claim 5
Dependent Claim
109 words
A parallel retractable-needles device of claim 3, in which each of said third and fourth slots at each of opposite ends thereof is enlarged, and in which each locking and unlocking means of each of the first needle structure and the second needle structure includes a threadedly mounted shaft extending transversely to said longitudinal axis and includes mounted with a biasing spring, a mounted head slidably axially on said transversely extending shaft and being biased toward its respective needle structure space, said head being larger than intermediate portions of its respective slot and seatable in each of the slot''s enlarged portion at each of opposite ends of the slot.
Claim 6
Dependent Claim
109 words
A parallel retractable-needles device of claim 1, in which each of said third and fourth slots at each of opposite ends thereof is enlarged, and in which each locking and unlocking means of each of the first needle structure and the second needle structure includes a threadedly mounted shaft extending transversely to said longitudinal axis and includes mounted with a biasing spring, a mounted head slidably axially on said transversely extending shaft and being biased toward its respective needle structure space, said head being larger than intermediate portIons of its respective slot and seatable in each of the slot''s enlarged portion at each of opposite ends of the slot.
Claim 7
Dependent Claim
36 words
A parallel retractable-needles device of claim 1, in which said first needle structure threaded guide projection extends through said first slot and in which said second needle structure''s threaded guide projection extends through said second slot.
Claim 8
Dependent Claim
69 words
A parallel retractable-needles device of claim 5, in which said first needle structure''s locking and unlocking means and in which said second needle structure''s locking and unlocking means is lockable of the respective slide structure at each of needle-extended position when the respective needle structure is extended through the first or second channel and needle-retracted position when the respective needle structure is retracted within the first or second channel.
Claim 9
Dependent Claim
92 words
A parallel retractable-needles device of claim 3, in which each slide structure includes an axially extending central channel about parallel with said longitudinal axis, and in which each slide structure includes two separate female-threaded apertures at least one of which is a through aperture extending transversely to said axially-extending channel and communicating with said channel and being positioned for screwably receiving one of said guide projections and sized for receiving one of said guide prjections such that a guide projection screwed therein is lockable of a needle axially inserted within said channel.
Claim 10
Dependent Claim
94 words
A parallel retractable-needles device of claim 1, in which each slide structure includes an axially extending central channel about parallel with said longitudinal axis, and in which each slide structure includes two separate female-threaded apertures at least one of which is a through aperture extending transversely to said axially-extending channel and communicating with said inner channel and being positioned for screwably receiving one of said guide projections and sized for receiving one of said guide projections such that a guide projection screwed therein is lockable of a needle axially inserted within said inner channel.
Claim 11
Dependent Claim
46 words
A parallel retractable-needles device of claim 9, in which said two separate apertures are spaced axially from one another a predetermined distance sufficient that the tightening of male threaded members in each respectively of said separate apertures does not crack the channel-containing slide structures each respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |