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.)
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Maquinas de Coser Alfa SA
Original Assignee
Maquinas de Coser Alfa SA
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Publication date
Application filed by Maquinas de Coser Alfa SAfiledCriticalMaquinas de Coser Alfa SA
Priority to ES1967133637UpriorityCriticalpatent/ES133637Y/en
Publication of ES133637UpublicationCriticalpatent/ES133637U/en
Application grantedgrantedCritical
Publication of ES133637YpublicationCriticalpatent/ES133637Y/en
Tensioner for sewing machines, characterized by being constituted by a support piece mounted on the head of the machine, inside which a rod is housed, threaded in its end area and in which an expandable nut is connected and regulated by springs, and equipped with a projection that fits into a groove of said support to prevent its simultaneous rotation with the rod, maintaining between it and the bottom of the support a spring that tends to insert the said rod as far as possible, which carries a control at its external end. Manual to regulate the tension of said spring according to the rotation given to it. (Machine-translation by Google Translate, not legally binding)
ES1967133637U1967-10-311967-10-31
TENSIONER FOR SEWING MACHINE.
ExpiredES133637Y
(en)
Device consisting of a set screw intended to vary the tension of the thread below in sewing machines (Machine-translation by Google Translate, not legally binding)
An improvement in the automatic government devices of the regulatory mechanism of the numbering of the thread in the selfactine machines of hilar lana (Machine-translation by Google Translate, not legally binding)