Patent US4014317A successfully refreshed from Google Patents.
US3753411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulator for cam controlled feed in sewing machine
Assignee: Singer Co
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Filing: 1972-06-30
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Granted: 1973-08-21
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Expires: 1992-06-30
Abstract
Abstract A control mechanism for selectively rendering effective a manual or a cam control for the sewing machine work feeding mechanism. Simultaneously with selection of cam control for the work feeding mechanism, provision is made for rendering ineffective the heavy spring which biases the work feeding mechanism in a forward direction of feed during manual control. Also associated with the selector for manual or cam control of the work feeding mechanism is a cam follower throw-out device whereby exchange of pattern cams is facilitated.
Inventors
- 👤 R Graham
- 👤 H Schaeflern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:23
CPC Classifications
D; D05; D05B; D05B19/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
A sewing machine having stitch forming instrumentalities, actuating mechanism therefor, a work feeding mechanism including a stitch length regulator with a manual setting device, a pattern cam means driven by said actuating mechanism, a cam follower adapted to track said pattern cam means, and an operating linkage operatively connected to said stitch length regulator, said cam follower and said operating linkage each including a lever, said levers pivoted on a substantially common fulcrum axis, and including adjacent radially extending lever arms, means for selectively rendering said cam follower effective to control said stitch length regulator comprising an operator influenced carrier member, an interposer constrained to move along a predetermined path on said carrier member, means shiftably supporting said carrier member on said sewing machine selectively to arrange said interposer in an effective position interlocking said lever arms for turning movement in unison and effective for transmitting motion from said cam follower to said operating linkage for the stitch length regulator.
Claim 2
Dependent Claim
160 words
A sewing machine having stitch forming instrumentalities, actuating mechanism therefor, a work feeding mechanism including a stitch length regulator with a manual setting device, a pattern cam means driven by said actuating mechanism, a cam follower adapted to track said pattern cam means, and an operating linkage operatively connected to said stitch length regulator, said cam follower and said operating linkage each including a lever, said levers pivoted on a substantially common fulcrum axis, and including adjacent radially extending lever arms, means for selectively rendering said cam follower effective to control said stitch length regulator comprising an operator influenced carrier member, an interposer constrained to move along a predetermined path on said carrier member, means shiftably supporting said carrier member on said sewing machine selectively to arrange said interposer in an effective position interlocking said lever arms for turning movement in unison and effective for transmitting motion from said cam follower to said operating linkage for the stitch length regulator.
Claim 3
Dependent Claim
73 words
A sewing machine as set forth in claim 1 in which said carrier member comprises a shaft which is arranged between said lever arms on axis substantially parallel to said fulcrum axis And formed diametrically with a guide slot, in which said interposer comprises a slide block shiftable in said guide slot and in which the interposer in said effective position engages each of said lever arms substantially equidistant from said fulcrum axis.
Claim 4
Dependent Claim
77 words
A sewing machine as set forth in claim 1 including a heavy spring biasing said stitch length regulator toward one extreme position in opposition to said manual setting device and in which a throw-out actuator for said heavy spring is arranged on said operator influenced carrier member to remove the heavy spring bias from said stitch length regulator when said interposer occupies an effective position for transmitting motion from the cam follower to the stitch length regulator.
Claim 5
Dependent Claim
50 words
A sewing machine as set forth in claim 1 in which cam follower throw-out means is provided effective to remove said cam follower out of tracking relation with said pattern cam means when said interposer occupies positions ineffective to transmit motion from said cam follower to said stitch length regulator.
Claim 6
Dependent Claim
83 words
A sewing machine as set forth in claim 4 in which an additional cam follower adapted to track said pattern cam means jogs said stitch forming instrumentalities, and in which a throwout actuator for said additional cam follower is arranged on said operator influenced carrier member and is effective to remove said additional cam follower out of tracking relation with said pattern cam means when said interposer occupies a position ineffective to transmit motion from said cam follower to said stitch length regulator.
Claim 7
Dependent Claim
105 words
A sewing machine as set forth in claim 2 including a heavy spring biasing said stitch length regulator toward one extreme position in opposition to said manual setting device, and an additional cam follower for jogging said stitch forming instrumentalities adapted to track said pattern cam means, in which said carrier member shaft carries a control cam fast thereon operative when said interposer is shifted into effective position to remove said heavy spring bias from said stitch length regulator and operative when said interposer is shifted out of effective position to remove said additional cam follower out of tracking relation with said pattern cam means.
Claim 8
Dependent Claim
132 words
A sewing machine as set forth in claim 6 in which said carrier member shaft can be turned manually in opposite directions from a mid-portion in which said interposer occupies an effective position for transmitting motion from said pattern cam means to said stitch length regulator, in which said control cam is formed to ready the sewing machine for patterned zigzag sewing with manual stitch length regulation when the carrier member is turned in one direction from said mid-position by restoring said heavy feed regulator biasing spring, and in which said control cam is formed to ready the pattern cam means for exchange of cam units by removing said additional cam follower out of tracking relation with said pattern cam means when the carrier member shaft is turned in the opposite direction.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |