US136976A - Improvement in sewing-machines - Google Patents
Improvement in sewing-machines Download PDFInfo
- Publication number
- US136976A US136976A US136976DA US136976A US 136976 A US136976 A US 136976A US 136976D A US136976D A US 136976DA US 136976 A US136976 A US 136976A
- Authority
- US
- United States
- Prior art keywords
- pulley
- shaft
- arm
- sewing
- machines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 240000007600 Lysimachia clethroides Species 0.000 description 2
- 230000000414 obstructive Effects 0.000 description 2
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/22—Devices for stopping drive when sewing tools have reached a predetermined position
Definitions
- the invention consists in the combination of mechanism for automatically effecting stoppage of the machine with the mechanism or any part of it at a certain position.
- FIG. 1 a machine embodying the invention.
- Fig. 2 shows the friction-pulley and lever-stop in end view
- Fig. 3 is a plan of the pulley mechanism.
- h is a diskpulley fixed on the shaft 1), and havinga friction surface or pad, i, by contact with the face of which a band-pulley, k, is made to turn the shaft, the pulley 7c sliding on the shaft and turning loosely upon it, (except when clamped or held against the pulley 7b,) its motion being imparted by its band-connection with the crank-shaft.
- the pulley 7c is thrown against the pulley h by means of a shipper-rocker, is, having two arms, 1 m, projecting therefrom, the arm m having a shoe, n, that enters a groove, 0, in the hub of the pulley k, and moves the pulley k forward against the pulley h when the arm 1 is thrown down.
- a suitable spring throws the pulley 70 back,
- the lever-arm m From this collar 10 extends an arm, q, and from the lever-arm m extends a stop, 1", this stop, when the hub 00 and collar 19 are in contact, being in the direct path of rotative movement of the arm q, so that when the arm q strikes this stop 1" further movement of the shaft 1) will be arrested.
- the arm q is so located that it will always strike the stop when, and only when, the needlepoint is above the work or at its highest position, as seen at Fig. 1.
- the arm q may, of course, be so arranged as to stop the shaft with the needle or the mechanism at any desired point; but the invention is particularly designed for the arrest of the shaft with the needle in the position described.
- the leverarm Z To move the pulley 70 up to the pulley h, the leverarm Z is preferably connected by a suitablerod with a lever to be operated byfoot.
- the rocker 70 provided with the arms I and m, shoe a, stop 1', and a reacting spring, combined with the collar and its arm q, the friction-hub m, and the fast and loose pulleys h k, and shaft b, substantially as and for the purpose described.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Description
A. s. DINFSMORE.
Sewing-Machines.
N0.136,9-76. PatentedMarch18,1873.
i AM. PHOTO iITHOGRAFHIC m N. )t(asannns's PnncEss) UNITED STATES PATENT QFFICE.
ALFRED S. DINSMORE, OF BOSTON, MASSACHUSETTS.
' IMPROVEMENT IN SEWING-MACHINES.
Specification forming part of Letters Patent No. 136,976, dated March 18, 1873.
To all whom it may concern:
Be it known that I, ALFRED S. DINSMORE, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Sewing-Machines and I do hereby declare that the following, when taken in connection with the drawing which accompanies and forms part of this specification, is a description of my invention sufficient to enable those skilled in the art to practice it.
The invention consists in the combination of mechanism for automatically effecting stoppage of the machine with the mechanism or any part of it at a certain position.
The drawing shows in side elevation at Figure 1 a machine embodying the invention. Fig. 2 shows the friction-pulley and lever-stop in end view, and Fig. 3 is a plan of the pulley mechanism.
(1. denotes the work-supporting plate b, the shaft that immediately actuates the feed, presser, and stitch-forming mechanism. cdenotes the presser-foot; d, the needle; 6, the needle-bar; f, the goose-neck; g, the lever that actuates the needle-bar. h is a diskpulley fixed on the shaft 1), and havinga friction surface or pad, i, by contact with the face of which a band-pulley, k, is made to turn the shaft, the pulley 7c sliding on the shaft and turning loosely upon it, (except when clamped or held against the pulley 7b,) its motion being imparted by its band-connection with the crank-shaft. The pulley 7c is thrown against the pulley h by means of a shipper-rocker, is, having two arms, 1 m, projecting therefrom, the arm m having a shoe, n, that enters a groove, 0, in the hub of the pulley k, and moves the pulley k forward against the pulley h when the arm 1 is thrown down. When the arm I is released, a suitable spring throws the pulley 70 back,
and it ceases to drive the pulley h by any contact therewith; but when the pulley k is thus thrown back, the end of its hub a: is thrown against the inner face of a collar, 12, fixed on the end of the shaft, a friction-pad being placed between the collar and hub, and the friction of the hub .90 being sufficient to turn the collar 10 if there be no obstruction to the motion of the shaft except that involved in actuating the mechanism. From this collar 10 extends an arm, q, and from the lever-arm m extends a stop, 1", this stop, when the hub 00 and collar 19 are in contact, being in the direct path of rotative movement of the arm q, so that when the arm q strikes this stop 1" further movement of the shaft 1) will be arrested. The arm q is so located that it will always strike the stop when, and only when, the needlepoint is above the work or at its highest position, as seen at Fig. 1. The arm q may, of course, be so arranged as to stop the shaft with the needle or the mechanism at any desired point; but the invention is particularly designed for the arrest of the shaft with the needle in the position described. To move the pulley 70 up to the pulley h, the leverarm Z is preferably connected by a suitablerod with a lever to be operated byfoot.
I claimv The rocker 70 provided with the arms I and m, shoe a, stop 1', and a reacting spring, combined with the collar and its arm q, the friction-hub m, and the fast and loose pulleys h k, and shaft b, substantially as and for the purpose described.
A. S. DINSMORE.
Witnesses FRANCIS GOULD, M. W. FROTHINGHAM.
Publications (1)
Publication Number | Publication Date |
---|---|
US136976A true US136976A (en) | 1873-03-18 |
Family
ID=2206392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US136976D Expired - Lifetime US136976A (en) | Improvement in sewing-machines |
Country Status (1)
Country | Link |
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US (1) | US136976A (en) |
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0
- US US136976D patent/US136976A/en not_active Expired - Lifetime
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