Resources Contact Us Home
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
Accessing device via communication protocol selection
Rear body panel cover for a motor vehicle
Method of treating a preceramic material
Local call local switching at handover
Charge domain filter and method thereof
Method and system for monitoring service quality in a mobile node
Semiconductor integrated circuit
  Randomly Featured Patents
Destruction and dye resistant tag; tagged textile article and method of identifying textiles subject to a dyeing and finishing process
Belt fastener with enlarged loop for hinge pin
Nestable buckets having lockable bails
Filter methods to capture a desired amount of material from a sample suspension for monolayer deposition, analysis or other uses
Fishing lure
Beverage bottling plant for filling bottles with a liquid beverage filling material, a container filling plant container information adding station, such as, a labeling station, configured to
Security clamp for cables
Labeled phosphonic acid compositions for investigations of in vivo deposits of calcium