US3596618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic buttonhole mechanisms for zigzag sewing machines
Assignee: Singer Co
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Filing: 1970-04-17
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Granted: 1971-08-03
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Expires: 1990-04-17
Abstract
Abstract A buttonhole mechanism having a wheel, which rests upon the material being sewn so that the wheel turns as the material is being fed, to provide sensing pulses at preset intervals which control electromechanisms for proper operation of a compact buttonholing assembly of a household zigzag sewing machine. When an operator sets a single-switching device, the buttonholing assembly is coupled to all of the sewing machine controls requiring variation during the stitching of the buttonhole.
Inventors
- 👤 Henry T Goldbach
- 👤 James V Molnar
- 👤 Robert C Hauf
- 👤 Robert W Graft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:35
CPC Classifications
D; D05; D05B; D05B3/00; D05B3/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
276 words
In a zigzag sewing machine having an endwise reciprocatory needle bars, mechanism for jogging said needle bar laterally to produce zigzag stitches including a member regulating the neutral position of needle jogging motion, a work-feeding mechanism including a feed-regulating member having a range of positions cOrresponding to forward and reverse directions of work feed, and actuating mechanism in said sewing machine operatively connected to impart endwise reciprocatory and laterally vibratory movements to said needle bar and movements to said work-feeding mechanism in timed relation thereto, a buttonholing mechanism comprising rotary cam means supported on said sewing machine, a singleoperating member guided to move between extreme positions along a constrained path, a follower carried by said operating member in tracking relation with said rotary cam means, linkage in said sewing machine operatively connecting said member regulating the neutral position of needle jogging motion with said singleoperating member in only one extreme position of said operating member, a manually separable connection between said singleoperating member and said feed-regulating member, drive means operated by said sewing machine actuating mechanism for imparting turning movement in stepwise increments to said rotary cam means in first and second spaced portions of said rotary cam means, said first and second spaced portions rotary means, and the intervals between said spaced portions defining the periphery of said rotary cam means, operator-influenced handle means secured to said rotary cam means for turning said rotary cam means through one interval so that said drive means engage said first portion, and means responsive to movement of the work for turning said rotary cam means through the other interval so that said drive means engage said second portion.
Claim 2
Dependent Claim
276 words
In a zigzag sewing machine having an endwise reciprocatory needle bars, mechanism for jogging said needle bar laterally to produce zigzag stitches including a member regulating the neutral position of needle jogging motion, a work-feeding mechanism including a feed-regulating member having a range of positions cOrresponding to forward and reverse directions of work feed, and actuating mechanism in said sewing machine operatively connected to impart endwise reciprocatory and laterally vibratory movements to said needle bar and movements to said work-feeding mechanism in timed relation thereto, a buttonholing mechanism comprising rotary cam means supported on said sewing machine, a singleoperating member guided to move between extreme positions along a constrained path, a follower carried by said operating member in tracking relation with said rotary cam means, linkage in said sewing machine operatively connecting said member regulating the neutral position of needle jogging motion with said singleoperating member in only one extreme position of said operating member, a manually separable connection between said singleoperating member and said feed-regulating member, drive means operated by said sewing machine actuating mechanism for imparting turning movement in stepwise increments to said rotary cam means in first and second spaced portions of said rotary cam means, said first and second spaced portions rotary means, and the intervals between said spaced portions defining the periphery of said rotary cam means, operator-influenced handle means secured to said rotary cam means for turning said rotary cam means through one interval so that said drive means engage said first portion, and means responsive to movement of the work for turning said rotary cam means through the other interval so that said drive means engage said second portion.
Claim 3
Dependent Claim
67 words
A buttonholing device according to claim 1 wherein said drive means comprises an oscillatory pawl operated by said sewing machine actuating mechanism, said rotary cam means comprising a cam disk having ratchet teeth on said first and second portions arranged almost all around the cam disk periphery and formed to accommodate stepwise engagement of said oscillating pawl, said intervals being two plain, diametrically opposed peripheral surface spots.
Claim 4
Dependent Claim
124 words
A buttonholing device according to claim 2 wherein said means responsive to movement of the work comprises a second oscillating pawl operated by said sewing machine actuating mechanism, releaseable means for holding said second pawl out of driving contact with said cam disk, an electrical circuit operating said releasable means, and means for providing sensing pulses at a preset position to said electrical circuit for controlling said releaseable means, whereby at said preset position said releaseable means release said second pawl so that said second pawl engages said ratchet teeth of said second portion of said cam disk to turn said cam disk through one surface spot so that said first-mentioned pawl engages said ratchet teeth of said second portion of said cam disk.
Claim 5
Dependent Claim
89 words
A buttonholing device according to claim 3 wherein said releaseable means comprises a solenoid having a spring biased plunger, a pin being secured to said plunger and extending through slot means formed in said second pawl, said slot means permitting continuous oscillating movement of said second pawl while said second pawl is being held off said cam disk by said pin, whereby at said one preset position said solenoid is activated to retract said plunger, thereby moving the pin out of the slot means to release said second pawl.
Claim 6
Dependent Claim
145 words
A buttonholing device according to claim 1 having second means responsive to movement of the work for stopping the sewing machine at the completion of the buttonhole comprising abutment means on said rotary cam means, said abutment means being turned to a predetermined position to control an electrical switch of a first electrical circuit, said electrical switch permitting said first electrical circuit to operate a relay, said relay controlling latching contacts of a second electrical circuit, said second circuit operating the sewing machine motor, and means for providing sensing pulses at the completion of the buttonhole to said first electrical circuit for activating said relay when said abuTment means are in said predetermined position, whereby the activated relay moves said latching contacts to an opened position thereby opening said second electrical circuit to cut power to the sewing machine motor and stopping the sewing machine.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |