US3851237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixed point stop mechanism for sewing needle in sewing machine
Assignee: Mitsubishi Electric Corp
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Filing: 1973-04-18
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Granted: 1974-11-26
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Expires: 1993-04-18
Abstract
Abstract A fixed point stop mechanism for selectively stopping an output member, such as a sewing needle in a sewing machine in one of a plurality of predetermined positions comprises a position sensing means for sensing the sewing needle being at a selected one of predetermined positions, means for driving the sewing machine at a low speed sufficient to render the position sensing device operative, a first relay connected in series to said position sensing device, and a second relay energized upon operation of the first relay thereby to cause a set position, in which the sewing needle is to be selectively stopped, to be changed-over from one to another of the predetermined positions without stopping the rotation of the sewing machine.
Inventors
- 👤 M Yokoyama
- 👤 T Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:55
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/22; D05B69/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
275 words
A fixed point stop mechanism for selectively stopping an output member in one of a plurality of predetermined stop positions comprising: a movable output member; drive means for driving said output member at a first speed; auxiliary drive means for driving said output member at a second speed which is substantially less than said first speed; selecting means for alternatively selecting one of said drive means and auxiliary drive means to drive said output member; position sensing meaNs operative when said output member is driven at said second speed for sensing one of a plurality of predetermined stop positions wherein said output member is to be selectively stopped and developing a corresponding output signal and including means for selectively a predetermined one of said stop positions; and braking means responsive to the output signal for braking said output member and stopping same at the selected predetermined stop position, wherein said position sensing means comprises a switch having two switching states, a relay connected to said switch deenergized when said switch is in one switching state and energized when said switch is in another switching state, said relay operative when energized to render said position sensing means effective to sense the selected position of said output member and operative when deenergized to render said position sensing means ineffective to sense the selected position of said output member, and delay circuit means connected to said relay for delaying the deenergization of said relay for a predetermined relay time after said switch is in said one switching state to enable said output member to be driven at said second speed before said position sensing means is rendered effective.
Claim 2
Dependent Claim
275 words
A fixed point stop mechanism for selectively stopping an output member in one of a plurality of predetermined stop positions comprising: a movable output member; drive means for driving said output member at a first speed; auxiliary drive means for driving said output member at a second speed which is substantially less than said first speed; selecting means for alternatively selecting one of said drive means and auxiliary drive means to drive said output member; position sensing meaNs operative when said output member is driven at said second speed for sensing one of a plurality of predetermined stop positions wherein said output member is to be selectively stopped and developing a corresponding output signal and including means for selectively a predetermined one of said stop positions; and braking means responsive to the output signal for braking said output member and stopping same at the selected predetermined stop position, wherein said position sensing means comprises a switch having two switching states, a relay connected to said switch deenergized when said switch is in one switching state and energized when said switch is in another switching state, said relay operative when energized to render said position sensing means effective to sense the selected position of said output member and operative when deenergized to render said position sensing means ineffective to sense the selected position of said output member, and delay circuit means connected to said relay for delaying the deenergization of said relay for a predetermined relay time after said switch is in said one switching state to enable said output member to be driven at said second speed before said position sensing means is rendered effective.
Claim 3
Dependent Claim
297 words
A fixed point stop mechanism for selectively stopping an output member sequentially in at least two predetermined stop positions comprising: a movable output member; drive means for driving said output member at a first speed; auxiliary drive means for driving said output member at a second speed which is substantially less than said first speed; selecting means for alternatively selecting one of said drive means and auxiliary drive means to drive said output member; position sensing means operative when said output member is driven at said second speed for sensing sequentially said at least two predetermined stop positions wherein said output member is to be selectively stopped and developing corresponding first and second output signals; braking means coacting with said auxiliary drive means and responsive to the first output signal after which time said auxiliary drive means resumes driving said output member and said braking means responsive to the second output signal for braking said output member and stopping same in the other of said at least two stop positions, wherein said position sensing means comprises a switch having two switching states, a relay connected to said switch denergized when said switch is in one switching state and energized when said switch is in another switching state, said relay operative when energized to render said position sensing means effective to sense the selected position of said output member and operative when deenergized to render said position sensing means ineffective to sense the selected position of said output member, and relay circuit means connected to said relay for delaying the deenergization of said relay for a predetermined delay time after said switch is in said one switching state to enable said output member to be driven at said second speed before said position sensing means is rendered effective.
Claim 4
Dependent Claim
297 words
A fixed point stop mechanism for selectively stopping an output member sequentially in at least two predetermined stop positions comprising: a movable output member; drive means for driving said output member at a first speed; auxiliary drive means for driving said output member at a second speed which is substantially less than said first speed; selecting means for alternatively selecting one of said drive means and auxiliary drive means to drive said output member; position sensing means operative when said output member is driven at said second speed for sensing sequentially said at least two predetermined stop positions wherein said output member is to be selectively stopped and developing corresponding first and second output signals; braking means coacting with said auxiliary drive means and responsive to the first output signal after which time said auxiliary drive means resumes driving said output member and said braking means responsive to the second output signal for braking said output member and stopping same in the other of said at least two stop positions, wherein said position sensing means comprises a switch having two switching states, a relay connected to said switch denergized when said switch is in one switching state and energized when said switch is in another switching state, said relay operative when energized to render said position sensing means effective to sense the selected position of said output member and operative when deenergized to render said position sensing means ineffective to sense the selected position of said output member, and relay circuit means connected to said relay for delaying the deenergization of said relay for a predetermined delay time after said switch is in said one switching state to enable said output member to be driven at said second speed before said position sensing means is rendered effective.
Claim 5
Dependent Claim
22 words
A fixed point stop mechanism according to claim 2, wherein said delay circuit means includes means for selectively varying the delay time.
Claim 6
Dependent Claim
285 words
A fixed point stop mechanism for selectively stopping an output member sequentially in at least two predetermined stop positions comprising: a movable output member; drive means for driving said output member at a first speed; auxiliary drive means for driving said output member at a second speed which is substantially less than said first speed; selecting means for alternatively selecting one of said drive means and auxiliary drive means to drive said output member; position sensing means operative when said output member is driven at said second speed for sensing sequentially said at least two predetermined stop positions wherein said output member is to be selectively stopped and developing corresponding first and second output signals; braking means coacting with said auxiliary drive means and responsive to the first output signal after which time said auxiliary drive means resumes driving said output member and said braking means responsive to the second output signal for braking said output member and stopping same in the other of said at least two stop positions, wherein said position sensing means comprises circuit means for sequentially sensing two predetermined stop positions and comprising a switch having two switching states, a relay connected to said switch energized when said switch is in one switching state and deenergized when said switch is in another switching state, and relay operative when energized to render said position sensing means effective to sense one position of said output member and operative when deenergized to render said position sensing means effective to sense another position of said output member, and delay circuit means connected to said relay for delaying for a predetermined time the energization of said relay after said switch is in said one switching state.
Claim 7
Dependent Claim
285 words
A fixed point stop mechanism for selectively stopping an output member sequentially in at least two predetermined stop positions comprising: a movable output member; drive means for driving said output member at a first speed; auxiliary drive means for driving said output member at a second speed which is substantially less than said first speed; selecting means for alternatively selecting one of said drive means and auxiliary drive means to drive said output member; position sensing means operative when said output member is driven at said second speed for sensing sequentially said at least two predetermined stop positions wherein said output member is to be selectively stopped and developing corresponding first and second output signals; braking means coacting with said auxiliary drive means and responsive to the first output signal after which time said auxiliary drive means resumes driving said output member and said braking means responsive to the second output signal for braking said output member and stopping same in the other of said at least two stop positions, wherein said position sensing means comprises circuit means for sequentially sensing two predetermined stop positions and comprising a switch having two switching states, a relay connected to said switch energized when said switch is in one switching state and deenergized when said switch is in another switching state, and relay operative when energized to render said position sensing means effective to sense one position of said output member and operative when deenergized to render said position sensing means effective to sense another position of said output member, and delay circuit means connected to said relay for delaying for a predetermined time the energization of said relay after said switch is in said one switching state.
Claim 8
Dependent Claim
22 words
A fixed point stop mechanism according to claim 4, wherein said delay circuit means includes means for selectively varying the delay time.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |