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
Registration and network access control
Semiconductor thin film, thin film transistor, method for manufacturing same, and manufacturing equipment of semiconductor thin film
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems
Notebook computer
Methods for testing OData services
Method and system for distributing ringback files
Method and apparatus for exercise monitoring combining exercise monitoring and visual data with wireless internet connectivity
  Randomly Featured Patents
Intelligent exploration through multiple hierarchies using entity relevance
Multi parts protective garment for motorbikers
Tape drive transport roller
Lawn mower tilt tool
Chopping board
Cerium oxycompound, stable anode for molten salt electrowinning and method of production
Power module with lowered inductance and reduced voltage overshoots
Aqua-ammonia absorption system generator with split vapor/liquid feed
Dental polishing head and method
Method and device for delivering radiotherapy