DE820831C - Looper thread monitor - Google Patents

Looper thread monitor

Info

Publication number
DE820831C
DE820831C DEP1739A DE0001739A DE820831C DE 820831 C DE820831 C DE 820831C DE P1739 A DEP1739 A DE P1739A DE 0001739 A DE0001739 A DE 0001739A DE 820831 C DE820831 C DE 820831C
Authority
DE
Germany
Prior art keywords
thread
thread monitor
looper thread
upper thread
presser foot
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
Application number
DEP1739A
Other languages
German (de)
Inventor
Herbert Pfuhlmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DEP1739A priority Critical patent/DE820831C/en
Application granted granted Critical
Publication of DE820831C publication Critical patent/DE820831C/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B51/00—Applications of needle-thread guards; Thread-break detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

Beim Nähen mit der Nähmaschine entsteht durch Verknotung von 'dbeffaden und Unterfaden im Stoff die Doppelsteppstichnaht.When sewing with a sewing machine, 'dbeffaden is created by knotting and bobbin thread in the fabric, the lockstitch seam.

Der vorliegende Erfindungsgegenstand dient nun dazu, der Näherin das Ausbleiben des Unterfadens oder Greiferfadens sofort kenntlich zu machen. Er ist in der Zeichnung beispielsweise dargestellt. Es zeigt Fig. i den Spulenfadenwächter in einen Druckerfuß eingebaut von der Seite, Fig. 2 den Drückerfuß in Draufsicht.The present subject matter of the invention is now used to provide the seamstress with the Immediately identify the absence of the bobbin thread or looper thread. He is shown in the drawing, for example. It shows Fig. I the bobbin thread monitor built into a printer foot from the side, Fig. 2 the presser foot in plan view.

Beim Ausbleiben des Unterfadens unterbleibt die Verschlingung des Oberfadens im Stoff, der Oberfaden wird nach oben herausgezogen und schlägt in schneller Folge oberhalb des Drückerfußes. Dieser ist nun, ausgehend vom Nadelstichloch i nach hinten mit einem Auffangschlitz 2 versehen, in welchen der Oberfaden alsdann eintritt.If there is no bobbin thread, the will not loop Upper thread in the fabric, the upper thread is pulled out upwards and beats in faster Follow above the presser foot. This is now, starting from the needle hole i provided to the rear with a collecting slot 2, in which the upper thread then entry.

Oberhalb des Auffangschlitzes 2 ist ein an einem Stahlstift 4 befestigter Anschlagbügel 3 angeordnet, an welchen der Oberfaden anschlägt. Der Stahlstift 4 ist in einer Führungshülse s, Nvelche im senkrechten Teil des Nähfußes 8 eingelötet ist. längs verschiebbar und trifft bei seiner Längsverschiebung unter dem Einfluß des 0berfadenanschlagens auf die Stahlblattfeder 6 einer elektrischen Kontaktanordnung, deren Kontakte hierdurch einen Stromkreis schließen. Innerhalb des Stromkreises liegt ein Warnlämpchen, welches alsdann aufleuchtet.Above the collecting slot 2 is attached to a steel pin 4 Arranged stop bracket 3, on which the upper thread strikes. The steel pin 4 is soldered into a guide sleeve s, Nvelche in the vertical part of the sewing foot 8 is. longitudinally displaceable and meets with its longitudinal displacement under the influence the upper thread beating on the steel leaf spring 6 of an electrical contact arrangement, their contacts thereby close a circuit. Inside the circuit there is a warning light, which then lights up.

Claims (1)

PATENTANSPRUCH: Greiferfadenwächter für Doppelsteppstichnähmaschinen, gekennzeichnet durch einen im Drückerfuß (i) oberhalb eines vom Stichloch nach hinten reichenden Auffangschlitzes (2) verschiebbar angeordneten Anschlagbügel (3), an welchen der beim Ausbleiben des Greiferfadens frei gewordene Oberfaden anschlägt und dessen Träger (Stahlstift 4) unter dem Einfluß dieses Anschlagens gegen die Schließkontakte einer Alarmleitung geschoben wird. PATENT CLAIM: Hook thread monitor for lockstitch sewing machines, characterized by a stop bracket (3) which is slidably arranged in the presser foot (i) above a catching slot (2) reaching backwards from the needle hole and on which the upper thread, which has become free when the hook thread is missing, hits and its carrier (steel pin 4) is pushed under the influence of this attack against the closing contacts of an alarm line.
DEP1739A 1950-05-31 1950-05-31 Looper thread monitor Expired DE820831C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP1739A DE820831C (en) 1950-05-31 1950-05-31 Looper thread monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP1739A DE820831C (en) 1950-05-31 1950-05-31 Looper thread monitor

Publications (1)

Publication Number Publication Date
DE820831C true DE820831C (en) 1951-11-12

Family

ID=5647715

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP1739A Expired DE820831C (en) 1950-05-31 1950-05-31 Looper thread monitor

Country Status (1)

Country Link
DE (1) DE820831C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1022891B (en) * 1953-07-31 1958-01-16 Graeve Bartholomeus De Looper thread monitor for automatically stopping an electric sewing machine if the looper thread fails
DE1111916B (en) * 1957-05-22 1961-07-27 Pfaff Ag G M Sewing machine with bobbin thread monitor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1022891B (en) * 1953-07-31 1958-01-16 Graeve Bartholomeus De Looper thread monitor for automatically stopping an electric sewing machine if the looper thread fails
DE1111916B (en) * 1957-05-22 1961-07-27 Pfaff Ag G M Sewing machine with bobbin thread monitor

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