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
Ascertaining presentation format based on device primary control determination
Catalyst composition with nanometer crystallites for slurry hydrocracking
Process for producing .beta.-sialon fluorescent material
Off-loading of processing from a processor blade to storage blades based on processing activity, availability of cache, and other status indicators
Method of transmitting data using spatial multiplexing
Relative pose estimation of non-overlapping cameras using the motion of subjects in the camera fields of view
Signal processing and tiered signal encoding
  Randomly Featured Patents
Retractable pen with illumination means
Method for separating clods and the like from potatoes
Ball and socket joint
Cabinet pull
Transient voltage protector
RF feedthrough coaxial connector for wireless communications in hazardous environments
Combination of a retinoid with a polyamine polymer
Layered organoarsenous inorganic polymers
Charged particle beam apparatus and method for stably obtaining charged particle beam image
Monitoring of tritium