US3872809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle bar release device
Assignee: Singer Co
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Filing: 1974-09-13
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Granted: 1975-03-25
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Expires: 1994-09-13
Abstract
Abstract A needle bar release device having a latch release member that is manually movable, or automatically movable by a solenoid, into engagement with a coupling member to unlatch the coupling member from a needle bar drive member. The latch release member is pivoted by the solenoid during automatic operation and slidably displaced on a frame during manual operation. The device also includes biasing springs for reversing the manually imposed slidable movement and automatically imposed pivotal movement of the latch release member.
Inventors
- 👤 Kenneth D Adams
- 👤 John Petronchak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:26
CPC Classifications
D; D05; D05B; D05B55/00; D05B55/14; D05B55/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
255 words
A needle bar release device for a sewing machine comprising, an endwise reciprocable needle bar, frame means for accommodating reciprocatory movement of said needle bar, a reciprocating drive member slidably mounted on said needle bar, a coupling member fixed to said needle bar for continuous movement with said needle bar, said coupling member including latching means for releasably connecting said coupling member to said drive member to transmit reciprocatory movement of said drive member to said needle bar, said latching means including a latch extension movable in a first direction toward said drive member to permit said coupling member to connect to said drive member, said latch extension being movable in a second direction away from said drive member to permit said coupling member to disconnect from said drive member, said latching means further including first biasing means for urging said latch extension to move in said first direction, latch release means mounted on said frame means for pivotal movement against said latching means to move said latch extension in said second direction, said first biasing means continuously urging said latch release means to pivot away from said latching means, and a solenoid member mounted on said frame means, said solenoid member having actuating means for causing pivotal movement of said latch release means against said latching means to cause movement of said latch extension in said second direction to disconnect said coupling member from said drive member whereby said drive member slides on said needle bar without influencing reciprocatory movement of said needle bar.
Claim 2
Dependent Claim
255 words
A needle bar release device for a sewing machine comprising, an endwise reciprocable needle bar, frame means for accommodating reciprocatory movement of said needle bar, a reciprocating drive member slidably mounted on said needle bar, a coupling member fixed to said needle bar for continuous movement with said needle bar, said coupling member including latching means for releasably connecting said coupling member to said drive member to transmit reciprocatory movement of said drive member to said needle bar, said latching means including a latch extension movable in a first direction toward said drive member to permit said coupling member to connect to said drive member, said latch extension being movable in a second direction away from said drive member to permit said coupling member to disconnect from said drive member, said latching means further including first biasing means for urging said latch extension to move in said first direction, latch release means mounted on said frame means for pivotal movement against said latching means to move said latch extension in said second direction, said first biasing means continuously urging said latch release means to pivot away from said latching means, and a solenoid member mounted on said frame means, said solenoid member having actuating means for causing pivotal movement of said latch release means against said latching means to cause movement of said latch extension in said second direction to disconnect said coupling member from said drive member whereby said drive member slides on said needle bar without influencing reciprocatory movement of said needle bar.
Claim 3
Dependent Claim
44 words
A needle bar release device as claimed in claim 1 wherein said latch release means includes a pivot member on said frame and an elongated latch release member mounted to said pivot member for pivotable movement toward and away from said latch release means.
Claim 4
Dependent Claim
81 words
A needle bar release device as claimed in claim 2 further comprising second biasing means connected to said elongated latch release member and wherein said elongated latch release member is formed with a slot engageable with said pivot member to permit slidable movement of said latch release member with respect to said pivot member, said spring being connected to said latch release member to continuously urge said latch release member to position one end of said slot against said pivot member.
Claim 5
Dependent Claim
69 words
A needle bar release device as claimed in claim 3 wherein said elongated latch release member further includes cam means comprising a first cam surface formed in said slot for cooperation with said pivot member to guide said latch release member against said coupling member when said latch release member is slidably moved with respect to said pivot member in opposition to the force of said second biasing means.
Claim 6
Dependent Claim
42 words
A needle bar release device as claimed in claim 4 further including a guide membeR on said frame spaced from said pivot member, said elongated latch release member being engageable with said guide member under the influence of said first biasing means.
Claim 7
Dependent Claim
44 words
A needle bar release device as claimed in claim 5 wherein said elongated latch release member is slidable with respect to said guide member, said cam means further including a second cam surface on said elongated latch release member engageable with said guide member.
Claim 8
Dependent Claim
102 words
A needle bar release device as claimed in claim 6 wherein said elongated latch release member includes a tail portion extending from said frame in the direction of said needle for manual access to permit exertion of manual pressure on said tail portion to slide said latch release member on said frame against the force of said second biasing means to move the first and second cam surfaces with respect to the pivot member and the guide member, the interaction between the first and second cam surfaces and the pivot and guide members guiding said latch release member against said coupling member.
Claim 9
Dependent Claim
93 words
A needle bar release device as claimed in claim 1 wherein said solenoid actuating means include a plunger member and a lever movable by said plunger member against said latch release means when said solenoid is energized such that said latch release means moves against said latching means to cause movement of said latch extension away from said drive member to disconnect said coupling member from said drive member, de-energization of said solenoid permitting said latch release means to move away from said latching means under the influence of said first biasing means.
Claim 10
Dependent Claim
54 words
A needle bar release device as claimed in claim 1 further including a resilient member having one end connected to said frame means and an opposite end connected to said coupling member for retracting said needle bar and coupling member in said frame means when said coupling member is disconnected from said drive means.
Claim 11
Dependent Claim
42 words
A needle bar release device as claimed in claim 9 wherein said coupling member includes a block portion, said latch arm being pivotally mounted to said block portion, and said opposite end of said resilient member being connected to said block portion.
Claim 12
Dependent Claim
164 words
A needle bar release device for a sewing machine comprising, an endwise reciprocable needle bar, frame means for accommodating reciprocatory movement of said needle bar, needle bar drive means for reciprocating said needle bar in said frame, coupling means for forming a detachable connection between said needle bar and said needle bar drive means, a coupling release member pivotally mounted on said frame for engagement with said coupling means to effect an uncoupling of said coupling means from said needle bar drive means such that said drive means does not influence reciprocatory movement of said needle bar, said coupling release member being normally disposed in a first position wherein said coupling means remains coupled to said needle bar drive means and being pivotally movable from said first position to a second position for effecting uncoupling of said coupling means from said needle bar drive means, and electrical actuating means for pivotally moving said coupling release member from its first position to its second position.
Claim 13
Dependent Claim
164 words
A needle bar release device for a sewing machine comprising, an endwise reciprocable needle bar, frame means for accommodating reciprocatory movement of said needle bar, needle bar drive means for reciprocating said needle bar in said frame, coupling means for forming a detachable connection between said needle bar and said needle bar drive means, a coupling release member pivotally mounted on said frame for engagement with said coupling means to effect an uncoupling of said coupling means from said needle bar drive means such that said drive means does not influence reciprocatory movement of said needle bar, said coupling release member being normally disposed in a first position wherein said coupling means remains coupled to said needle bar drive means and being pivotally movable from said first position to a second position for effecting uncoupling of said coupling means from said needle bar drive means, and electrical actuating means for pivotally moving said coupling release member from its first position to its second position.
References Cited (Backward Citations)
US3782311A
Cited
US3815529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |