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
Method for manufacturing thin film transistor and method for manufacturing display device
Analogue-to-digital converter
Method and system for processing dictated information
Granulated sweetening composition
Data scrambling in memory devices
Patient programmer with automated MRI compatibility verification for active implantable medical device
Distributed IPv6 neighbor discovery for large datacenter switching systems
  Randomly Featured Patents
Application device for a breathing mask arrangement
Test method for a variable capacitance measuring system
Pull
Method for automatic selection of a MAC protocol for a communication system and related system
Electric motor
Liquid crystal display having microlens and manufacturing process thereof
Vehicle-use key, maintenance support/management system of vehicle, and stolen vehicle check system
Image sensor and method of fabricating the same
Rotary switch
Preparation of hexafluoroisobutylene