Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Servo device for a multineedle sewing machine with engageable and disengageable needle bars










Image Number 5 for United States Patent #4815404.

A servo device for a multineedle sewing machine which includes two needle bars; driving and steop devices for said needle bars; devices for engaging and disengaging the two needle bars relative to the driving and stop devices; a feed-length adjustment device associated with at least one feed dog for the transport of the material being sewn; an adjustable thread tensioning device for the needle threads; devices for locking each needle bar selectively in its highest position; a positioning drive for the multineedle sewing machine; and a device including a position indicator attached to an arm shaft of the multineedle sewing machine, for adjusting the speed of rotation and positioning of the needle bars in predetermined positions. The servo device comprises a control system including a pair of electrical switches which respectively correspond to the needle bars, for controlling the engagement and disengagement of the needle bars relative to the driving and stop devices; a first setting device associated with the control system, for selectively interrupting the transport by the feed dog of the material being sewn; and a second setting device associated with the control system, for temporarily increasing a thread tensioning force exerted on the needle thread by the thread tensioning device.








 
 
  Recently Added Patents
System and method of creating and providing SMS http tagging
Method of and apparatus for laser drilling holes with improved taper
Sliding-type portable communication device
Gathering user feedback in web applications
System and method for enhanced transaction payment
Touch sensing technology
Antimicrobial flush solutions
  Randomly Featured Patents
Apparatus and method for processing material
Zoom lens system
Animal drawn riding toy
Differential amplifier circuit
High performance cooling device
Seatbelt retractor having multi-level load-limit setting devices
Presentation display apparatus for displaying two different images on separate displays for a listener and a speaker
Security and password mechanisms in a database system
Semiconductor device
Nucleus-fluorinated aromatic carboxylates and processes for their production