Method and apparatus for monitoring throw-off loop formation on the yarn guiding drum of coil winding machines

Claim 2

Method of monitoring the operation of a yarn winding machine having a yarn receiving coil and a drum for guiding the yarn onto said coil, said yarn having a predetermined reciprocating traverse stroke range, which comprises the steps of monitoring the range of said traverse stroke, and interrupting the yarn winding operation in response to a repeated falling short of said predetermined range.

Claim 3

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising means disposed within the area encompassed by the yarn traverse range for monitoring the predetermined stroke range of the yarn and for producing an output in response to a repeated falling short of said predetermined stroke range, and means for effecting a stoppage of the yarn winding operation of the machine in response to said output of said monitoring means.

Claim 4

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising means disposed within the area encompassed by the yarn traverse range for monitoring the predetermined stroke range of the yarn and for producing an output in response to a repeated falling short of said predetermined stroke range, and means for effecting a stoppage of the yarn winding operation of the machine in response to said output of said monitoring means.

Claim 5

Apparatus according to claim 2, wherein said monitoring means comprises a yarn sensing means for producing a signal in response to the passage of the yarn adjacent thereto with a predetermined stroke range of the yarn being Wound.

Claim 6

Apparatus according to claim 3, wherein said signal producing means includes means for generating a voltage pulse for each passage of the yarn thereat, and a pulse integrating circuit for said voltage pulses, and wherein said winding operation stoppage means includes means for responding to the output of said integrating circuit corresponding to a yarn traverse stroke which is repeatedly less than a predetermined value thereof, whereby a stoppage of the winding operation occurs due to a decrease in the yarn traverse stroke.

Claim 7

Apparatus according to claim 4, further including energy storage means for said integrating circuit and a timing circuit for controlling said energy storage means, and means for adjusting the time constant of said timing circuit, whereby only a repeated falling-short of the yarn traverse stoke effects the stoppage of the winding operation.

Claim 8

Apparatus according to claim 2, further including means for supplying pulses from said monitoring means dynamically to said operation stopping means.

Claim 9

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising monitoring means disposed within the area encompassed by the yarn traverse range for monitoring the range of the stroke of the yarn, said monitoring means including a yarn sensing means for producing an output signal in response to the passage of the yarn adjacent thereto with a predetermined stroke range of the yarn being wound, means for effecting a stoppage of the yarn winding operation of the machine in response to the output of said sensing means, said sensing means including means for generating a voltage pulse for each passage of the yarn thereat, and a pulse integrating circuit for said voltage pulses, said winding operation stoppage means including means for responding to the output of said integrating circuit corresponding to a yarn traverse stroke which is repeatedly less than a predetermined value thereof, whereby a stoppage of the winding operation occurs due to a decrease in the yarn traverse stroke, energy storage means for said integrating circuit, a timing circuit for controlling said energy storage means, means for adjusting the time constant of said timing circuit, whereby only a repeated falling-short of the yarn traverse stroke effects the stoppage of the winding operation, and means responsive to the winding yarn velocity for controlling the time constant of said integrating circuit.

Claim 10

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising monitoring means disposed within the area encompassed by the yarn traverse range for monitoring the range of the stroke of the yarn, said monitoring means including a yarn sensing means for producing an output signal in response to the passage of the yarn adjacent thereto with a predetermined stroke range of the yarn being wound, means for effecting a stoppage of the yarn winding operation of the machine in response to the output of said sensing means, said sensing means including means for generating a voltage pulse for each passage of the yarn thereat, and a pulse integrating circuit for said voltage pulses, said winding operation stoppage means including means for responding to the output of said integrating circuit corresponding to a yarn traverse stroke which is repeatedly less than a predetermined value thereof, whereby a stoppage of the winding operation occurs due to a decrease in the yarn traverse stroke, energy storage means for said integrating circuit, a timing circuit for controlling said energy storage means, means for adjusting the time constant of said timing circuit, whereby only a repeated falling-short of the yarn traverse stroke effects the stoppage of the winding operation, and means responsive to the winding yarn velocity for controlling the time constant of said integrating circuit.

Claim 11

Apparatus according to claim 7, further including means for generating a constant pulse sequence and means for providing a signal corresponding to the relationship between the potential pulse sequence derived from the yarn passage sensing elements and said constant pulse sequence, and means for automatically adjusting the time constant of said integrating circuit in response to said relationship corresponding signal.

Claim 12

Apparatus according to claim 8, wherein said constant pulse generating means comprises a monostable multivibrator, and means for actuating said multivibrator in response to pulses due to yarn traverse motion, whereby the time constant of said integrating stage is adjusted as a function of the yarn winding velocity.

Claim 13

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising monitoring means disposed within the area encompassed by the yarn traverse range for monitoring the rAnge of the stroke of the yarn, said monitoring means including means including a yarn sensing means for producing an output signal in response to the passage of the yarn adjacent thereto with a predetermined stroke range of the yarn being wound, means for effecting a stoppage of the yarn winding operation of the machine in response to the output of said sensing means, said sensing means including means for generating a voltage pulse for each passage of the yarn thereat, and a pulse integrating circuit for said voltage pulses, said winding operation stoppage means including means for responding to the output of said integrating circuit corresponding to a yarn traverse stroke which is repeatedly less than a predetermined value thereof, whereby a stoppage of the winding operation occurs due to a decrease in the yarn traverse stroke, energy storage means for said integrating circuit, a timing circuit for controlling said energy storage means, means for adjusting the time constant of said timing circuit, whereby only a repeated falling-short of the yarn traverse stroke effects the stoppage of the winding operation, a constant current source for respectively charging, and a constant current load for discharging said energy storage means, and means for controlling said constant current source in response to means for producing voltage pulses which are inversely proportional to the yarn velocity, whereby the effect of the yarn winding velocity is matched to the integration of the pulses derived from the yarn sensing elements.

Claim 14

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising monitoring means disposed within the area encompassed by the yarn traverse range for monitoring the rAnge of the stroke of the yarn, said monitoring means including means including a yarn sensing means for producing an output signal in response to the passage of the yarn adjacent thereto with a predetermined stroke range of the yarn being wound, means for effecting a stoppage of the yarn winding operation of the machine in response to the output of said sensing means, said sensing means including means for generating a voltage pulse for each passage of the yarn thereat, and a pulse integrating circuit for said voltage pulses, said winding operation stoppage means including means for responding to the output of said integrating circuit corresponding to a yarn traverse stroke which is repeatedly less than a predetermined value thereof, whereby a stoppage of the winding operation occurs due to a decrease in the yarn traverse stroke, energy storage means for said integrating circuit, a timing circuit for controlling said energy storage means, means for adjusting the time constant of said timing circuit, whereby only a repeated falling-short of the yarn traverse stroke effects the stoppage of the winding operation, a constant current source for respectively charging, and a constant current load for discharging said energy storage means, and means for controlling said constant current source in response to means for producing voltage pulses which are inversely proportional to the yarn velocity, whereby the effect of the yarn winding velocity is matched to the integration of the pulses derived from the yarn sensing elements.

Claim 15

Apparatus according to claim 10, wherein said inversely proportional pulse producing means comprises a monostable multivibrator.

Claim 16

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising means disposed within the area encompassed by the yarn traverse range for monitoring the range of the stroke of the yarn and for producing an output in response to the passing of the yarn adjacent thereto, means for effecting a stoppage of the yarn winding operation of the machine in response to the output of said monitoring means, a logic ''''AND'''' circuit element electrically disposed between the output of said monitoring means and said operation stoppage means, and means for providing a signal in response to the moving yarn connected to said logic circuit, whereby operation stoppage takes place only when the yarn is moving in the direction of the yarn guiding drum.

Claim 17

Apparatus for monitoring the operation of a yarn winding machine having a yarn receiving coil and a yarn guiding drum for the receiving coil located adjacent thereto, the guiding drum having means for guiding the yarn onto the receiving coil in a given pattern and providing a traverse for the yarn having a predetermined reciprocating stroke range in respect to the coil, the monitoring apparatus comprising means disposed within the area encompassed by the yarn traverse range for monitoring the range of the stroke of the yarn and for producing an output in response to the passing of the yarn adjacent thereto, means for effecting a stoppage of the yarn winding operation of the machine in response to the output of said monitoring means, a logic ''''AND'''' circuit element electrically disposed between the output of said monitoring means and said operation stoppage means, and means for providing a signal in response to the moving yarn connected to said logic circuit, whereby operation stoppage takes place only when the yarn is moving in the direction of the yarn guiding drum.