摘要:
Method of and apparatus for producing roving with a controlled number of strands including means for advancing a linear element along a given path; means for directing light to the element for reflection therefrom; means for sensing changes in the reflected light as an indication of changes in the speed of the elements advancement; means for supplying a signal in response to the changing reflected light; and means for controlling the advancement of the element in response to the signal.
摘要:
The application discloses an improved thread break detection device and system, intended particularly for use in industrial sewing equipment, which makes advantageous use of fluidic control components and circuits. The utilization of fluidic systems for thread break detection and the control has been known to be theoretically desirable, but its practical accomplishment has been elusive. The disclosed system includes a unique yet extremely simplified thread sensing fluidic control device, in advantageous association with known fluidic control elements, to achieve fluidic control of thread break detection with a high level of practicality. The system utilizes a wire-like thread detecting element of rather conventional configuration but arranged in a unique manner to provide system pressure variation in response to thread break. A fluidic position sensor element is arranged to sense a slight back pressure increase occasioned by movement of the sensing wire and to effect the desired machine control in accordance therewith.
摘要:
An improved method and device for readying of yarn ends, particularly in yarn-winding machines wherein, when a yarn piecing operation by a knotter is required after detecting a break of winding yarn, the retrieved yarns from a package and a supply cop are inspected to determine whether they involve doubled or tripled yarn by a slub catcher which is used for normal winding operation, and when the slub catcher detects the above-mentioned defect, the defect is cut off by a cutter of the slub catcher so that yarn piecing operation is not carried out therewith, and the yarn retrieving motion and the above-mentioned inspection is repeated.
摘要:
Device for detecting the breaking of a thread, particularly on an embroidery machine with automatic change of the color and/or ratio, of the type having for each needle an oscillating lever, bearing a first electric contact and being movable in respect of a second fixed electric contact, said lever being kept in position of open contact due to the stretching of the corresponding thread, and automatically moving to a position of closed contact upon ceasing of said stretching due to the breaking of the thread, comprising disconnecting means, to bring simultaneously out of operation all the oscillating levers bearing electric contacts, at the start of each color and/or ratio changing step on the machine, and connecting means to bring straight after back into operation only the contact-bearing levers corresponding to the needles starting to work, said connecting means operating in response to the tensioning of the threads of said needles starting to work.
摘要:
A yarn winding mechanism for removing the treated yarn from yarn treating apparatus such as stuffer crimpers and the like. The treated yarn is wound upon a spool into a yarn winding by means of a rotating driving roll engaging the peripheral surface of the winding. The winding is normally in engagement with the driving roll but is movable out of engagement to halt the winding operation. The yarn winding is mounted upon pivoted lever means, and movement to the disengaged position is accomplished by means of a cable attached at one end to the pivoted lever means and at the other end to a rotatable drum. A drum drive means operated by a fluid pressure motor selectively engagable withthe drum to rotate the drum through a predetermined arc, thus pulling the cable and disengaging the winding from the driving roll. The motor operates in response to means sensing the quantity of yarn in the exit portion of the treating chamber. A means for sensing a break in the yarn is also provided, which can disengage the winding from the driving roll and can stop the feeding of yarn into the yarn treating chamber.
摘要:
Method and apparatus for packaging or combining composite roving from a plurality of individual rovings including a rotatable winding collet, combining a plurality of the individual rovings as supplied from a source thereof into the composite roving, monitoring motion of each individual roving between the supply source and the combining means and supplying a motion signal for each roving in response to motion thereof, and control circuitry responsive to the motion signals for controlling the supplying and counting of the individual rovings for the composite roving as it is wound onto the collet.
摘要:
A device for effecting automatic rewind in a web handling apparatus of the type having means for rotatably supporting a hub having a web of strip material wound thereon with the innermost end of the web anchored to the hub so that at least a portion of the web extends substantially radially from the hub when the web has been completely unwound therefrom. The device includes drive means having a first condition for unwinding the web from the hub and a second condition for rotating the hub to rewind the web thereabout. A first sensing means is actuatable by an increase in tension of the web to close a first switch and a second sensing means is actuatable by a portion of the web extending radially from the core to close a second switch. The drive means is placed in its second condition to rewind the web onto the hub in response to the simultaneous closure of the first and second switches.
摘要:
In a tape transport including the proposed tape loadingunloading mechanism, multiple-loop tape-storage arms are automatically retracted for tape loading and unloading, and then returned to normal operation about their associated predetermined null positions. Multiple-loop tape-storage arms are especially useful in high acceleration tape transports. The combination including an arm tension spring, a roller, a cam further including an elongated slot, and the reel motor-brake assembly is utilized during normal operation of the arm about its predetermined null position and during the arm retract-return sequence. Commercially available tape loading-unloading mechanisms require additional components, such as a motor, which remain idle during normal operation of the tape transport, in order to effect the retract-return function.
摘要:
A RADIANT ENERGY SCANNER, SPECIFICALLY A PHOTOELECTRIC SCANNER, FOR INSPECTING MULTIELEMENT ARRAYS TO DETECT MISSING OR BROKEN ELEMENT CONDITIONS COMPRISES A RADIANT ENERGY TRANSMIT-RECEIVE HEAD SPACED FROM ONE SIDE OF THE ARRAY AND FIRST AND SECOND SETS OF SURFACES WITH DIFFERENT DEGREES OF REFLECTANCE SPACED FROM THE OPPOSITE SIDE OF THE ARRAY. THE HEAD IS RECIPROCATED TO SWEEP A RADIANT ENERGY, I.E., LIGHT BEAM, ACROSS THE ELEMENTS, AND THE FIRST AND SECOND SETS OF SURFACES ARE POSITIONED RELATIVE TO THE ELEMENTS SO THAT THE BEAM IS TRANSMITTED AND RECEIVED AT ANY GIVEN INSTANT ALONG SUBSTANTIALLY THE SAME OPTICAL AXIS. FURTHER, THE FIRST SET OF SURFACES HAVE A RELATIVELY HIGH REFLECTANCE AND ALIGN WITH ELEMENT INSPECTION AREAS TO COMPLETE A FIRST SET OF ALTERNATE BEAM TRANSMISSION PATHS WHICH HAVE A RELATIVELY LOW ATTENUATION LEVEL THAT IS MOMENTARILY INCREASED TO A SLIGHTLY HIGHER LEVEL EACH TIME THE BEAM TRAVERSES AN ELEMENT. THE SECOND SET OF SURFACES HAVE A RELATIVELY LOW REFLECTANCE AND ALIGN WITH THE SPACES ADJACENT THE INSPECTION AREAS TO COMPLETE A SECOND SET OF ALTERNATE BEAM TRANSMISSION PATHS WHICH HAVE A RELATIVELY HIGH ATTENUATION LEVEL. A LOGIC CIRCUIT IS INCLUDED TO PROVIDE AN OUTPUT INDICATION OF A MISSING ELEMENT CONDITION WHEN THE INTENSITY OF THE RECEIVED BEAM CHANGES IN IMMEDIATELY SUCCESSIVE STEPS FROM A RELATIVELY LOW LEVEL, TO A RELATIVELY HIGH LEVEL, AND BACK TO THE RELATIVELY LOW LEVEL, WITHOUT AN INTERVENING CHANGE TO AN INTERMEDIATE LEVEL.
摘要:
A switching system for a tape rewind operation is described as including a pair of switches in a rewind motor circuit. Both switches are connected in series relationship with the motor so that the motor attains a shut off condition when either switch is in the open position.