Speed regulator for the warp beam of a weaving machine
OwnerWalter Rehling, Jaime Rossellinventors
Life of this patent
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Abstract
A device for regulating the speed at which a weaving machine having a dancer is supplied with warp threads from a warp beam such that the speed and tension of the warp threads are substantially constant. The warp beam is provided with a variable speed drive having an alternatingly operable coupling and brake controlled by a regulator which compares the actual speed of the drive with a reference value. The actual speed is generated by an optical tachometer connected to the drive and the reference value represents an averaged number of dancer deflections and is generated by an integrator which receives the output of a potentiometer connected to the dancer.
Claims5
A speed regulator for a warp beam of a weaving machine comprising:
- variable speed drive means for accelerating or breaking a rate of rotation of a warp beam;
- means for generating a voltage output proportional to a deflection of a dancer which receives warp thread from a warp beam associated with said drive means;
- integrator means for counting and averaging said voltage outputs and generating an averaged voltage representing a desired voltage value;
- tachometer means connected to said drive means for generating a voltage proportional to said rate of rotation of a warp beam and representing an actual voltage value;
- and
- regulator means operatively connected to said drive means, said integrator means and said tachometer means for receiving said desired voltage value and said actual voltage value, comparing said voltage values, and selectively actuating said drive means in response to said voltage values to accelerate or brake a rate of rotation of an associated warp beam and thereby maintain tension of an associated warp thread substantially constant.
A speed regulator for a warp beam of a weaving machine comprising:
- a warp beam carrying a length of warp thread;
- dancer means including a downwardly biased dancer engaging said thread such that a tensioning or release of tension in said thread effects a displacement of said dancer;
- means for generating a voltage output proportional to said deflection of said dancer;
- integrator means for counting and averaging a predetermined number of said voltage outputs and generating an averaged voltage representing a desired voltage value;
- variable speed drive means for accelerating or braking a rate of rotation of said warp beam;
- tachometer means connected to said drive means for generating a voltage proportional to said rate of rotation of said warp beam and representing an actual voltage value;
- and
- regulator means operatively connected to said drive means, said integrator means, and said tachometer means for receiving and comparing said desired and actual voltage values and selectively actuating said drive means in response to a difference in said voltage values to accelerate or brake a rate of rotation of said warp beam such that said deflections of said dancer are minimized whereby the velocity of said warp thread fed to said dancer from said warp beam approaches the velocity of said warp thread downstream of said dancer when drawn into a weaving machine.
Dependencies are inferred from the claim text.