US3680599A - Looms for weaving - Google Patents

Looms for weaving Download PDF

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Publication number
US3680599A
US3680599A US7146A US3680599DA US3680599A US 3680599 A US3680599 A US 3680599A US 7146 A US7146 A US 7146A US 3680599D A US3680599D A US 3680599DA US 3680599 A US3680599 A US 3680599A
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United States
Prior art keywords
motor
switch
gear
loom
drive motor
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Expired - Lifetime
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US7146A
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English (en)
Inventor
Thomas Hindle
Vincent Pinder Banks
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Hindle Son and Co Ltd
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Hindle Son and Co Ltd
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Publication date
Application filed by Hindle Son and Co Ltd filed Critical Hindle Son and Co Ltd
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Publication of US3680599A publication Critical patent/US3680599A/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D03C1/22—Needles; Needle boxes; Needle boards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/20—Take-up motions; Cloth beams

Definitions

  • a reversible drive mechanism for a loom component for example a pattern barrel or a cloth take-up roll, which component is to be driven in stepwise manner at an appropriate time in the loom cycle comprises a drive motor for the component and an electrical control means whereby the motor is started and stopped periodically all in proper synchronism with the loom operation.
  • the control means is of a kind which is self setting in that it includes a first two-position startingswitch adjustable between its two positions by a first actuator operable at predetermined times in the loom cycle and a second two-position stopping-switch ad- 'justable between its position by a second actuator Hand-operated switchgear is provided to enable the motor, or motors, to be electrically reversed, whereby the loom component, or components, may be caused to rotate in either the forward or reverse direction, as required, the timing of the step-by-step movement in relation to the loom crankshaft being maintained for either direction of rotation.
  • a drive mechanism for a rotatable loom component for example a pattern barrel or cloth take-up roll, adapted to advance such component in stepwise manner in synchronism with loom operation, comprises a respective electric drive motor drivingly connected with the component, and a control means for the said motor, the control means including two-position startingand stopping-switches arranged in sequence, a first actuator means controlling the starting-switch and adapted cyclically to actuate the same in synchronism with loom operation and at a predetermined position in The loom cycle, and a second actuator means operable to actuate the stopping-switch upon the completion of a predetermined angular movement of the component, as initiated by actuation of the starting-switch, the switches being so arranged that on completion of a requisite angular movement of the component the second actuator means operates to cause the stoppingswitch to open the electric circuit to the motor thereby to stop the latter, the circuit remaining open until the next succeeding actuation of the starting-s
  • Each pattern barrel, or equivalent device is positively rotated in a step-by-step sequence by a respective electric motor driving through a speed reducing gearbox and through final gears, the barrel being turned through any appropriate fraction (such as one-sixth or one-eighth) of a revolution in synchronism with a continuously revolving controlling-shaft, such as a loom crankshaft, every time the motor is started.
  • the motor is started in response to the changing-over of a two-way starting-switch actuated by a timing-cam which revolves continuously at one-half the speed of the controlling shaft, and is subsequently stopped in response to a two-way stopping-switch being duly changed-over by a stopping-cam, driven by the motor itself, upon such stopping-cam having completed its allotted halfrevolution, which it may readily be arranged to do within a pre-determined fraction of the time occupied by one complete revolution of the controlling shaft.
  • the motor is provided with a brake which is released when the motor is energized and applied when it is subsequently de-energized, thereby serving to bring the motor and its associated gearing promptly to rest.
  • the power supply to each such motor is controlled by a pair of three-pole contactors, whereby the motor may be caused to rotate in either direction as determined by a hand-operated two-way switch which provides the choice of either forward or reverse direction of the ban'els step-by-step rotation.
  • this hand-operated reversingswitch is of the multi-pole type when controlling more than one motor.
  • both motors are started in response to the one starting-switch actuated by the continuously revolving timing-cam, but subsequently each motor is independently stopped when its self-driven stoppingcam, having completed its allotted half-revolution, duly changes-over its own stopping-switch, thereby switching-off its operative contactor and de-energizing the motor and its brake.
  • the cloth take-up rolls may be driven from the described mechanism of a motorised barrel, or barrels, by any suitable form of gearing, including change-gears as necessary to suit the desired pick density. In such case, reversal of the motor or motors serving to drive the pattern barrel or barrels reverses both barrels and take-up rolls simultaneously.
  • the take-up rolls are driven by a separate electric motor provided with suitable speed-reducing gear and a cam-actuated stoppingswitch, exactly as above described for the purpose of rotating a pattern barrel, in which case the barrel or barrels and the take-up rolls can be reversed either together or independently, as required.
  • take-up rolls of wide looms may be provided with central bearings, in which case each half-length is conveniently driven at its outer end through suitable reduction gearing by a separate electric motor. Both of these motors are readily synchronized with the loom crankshaft in the particular manner herein described.
  • the one change-over starting-switch actuated by a timing-cam revolving continuously at one-half of the crankshaft speed may serve to start all the motors employed on any one loom for driving the barrel or barrels and the single or double-ended take-up rolls, but each such motor, is subsequently stopped by its own stopping-switch when the cam it drives has completed the allotted half-revolution.
  • one timing-cam and startingswitch is provided to start the motorised barrel or barrels, and another timing-cam with its own startingswitch is provided to start the motorised take-up.
  • This duplication of the timing-cams which both revolve continuously at one-half of the crankshaft speed, enables the motorised barrels and the motorised take-up to be energized at different points in the loom cycle, as is desirable in some applications of the invention.
  • FIG. 1 shows, diagrammatically, one form of motorised pattern barrel
  • FIG. 2 is a diagram of the circuitry employed for one motorised pattern barrel or a single-ended take-up motion
  • FIG. 3 shows'a modified form of intermittent gears for driving the pattern barrel or barrels
  • FIG. 4 is a view corresponding to FIG. 1 showing an alternative drive connection to the intermittent gears shown in FIGS. 1 and 3;
  • FIG. 5 is a'diagram of the circuitry employed for two motorised pattern barrels, or one motorised barrel and one motorised single-ended take-up motion, or a doubleaended take-up motion powered by two separate motors;
  • FIGS. 6 and 7 are front and end elevations respectively of the drive transmission for a motorised singleended take-up motion embodying the invention
  • an electric motor 1 is provided with brake 2 which is released when the motor is energized, and automatically re-applied when it is subseq uently de-energized.
  • the motor 1 drives an output-shaft 4 through a speed reducing gear-box 3.
  • Fixed on the output-shaft 4 are a stopping-cam 6 and a pinion or driver-gear 5, which latter meshes with and drives a space-gear 9 fixed on a barrel-shaft 8, which, in this example, rotates in 60 steps, and moves a pattern chain P one pitch or step at a time.
  • the shaft 4 is rotated by the motor a half-revolution at a time, as determined by the stopping cam 6, the cam 6 actuating a change-over stopping-switch 7.
  • a controlling shaft 10 which in the case of a loom is the crankshaft, revolves continuously and drives a timing-cam 11 through a 2:1 reduction gear and, therefore, at half the speed of the controlling shaft 10.
  • the timing-cam ll actuates a changeover starting-switch 12, which latter is thus changedover at each successive half-revolution of the cam.
  • Cams 1 l and 6 have similar profiles, each comprising two sectors of slightly different radius joined by two short ramps spaced diametrically-opposite each other on the cam periphery.
  • the displacement of the cams is such as to actuate i.e. change over, the starting-switch 12 and the stopping-switch 7, which, being provided with springs, follow the profiles of the negative cams.
  • the switches 7, 12 are of two-way or change-over effect, and are interconnected in the particular manner shown in FIG. 2.
  • a hand-switch 17 in the circuit may be in either the F (forward) or the R (reverse) position, thereby determining whether contactor solenoid-coil S1 or $2 shall be energized and, therefore, the direction in which the barrel fixed on shaft 8 is to be rotated.
  • the intermittent gears 5 and 9 shown in FIG. 1 are so proportioned that the increment of rotation of the barrel shaft 8 is one-sixth of a revolution while the drivergear 5 and shaft 4 are turning through about one-half of their allotted half-revolution, the remaining half of such motion producing no movement of the barrel shaft 8.
  • the intermittent gears are so proportioned that the driver-gear 5a turns through a complete revolution while the space-gear 9 and barrel-shaft 8 are turned through one-sixth of a revolution.
  • the cam 6for actuating the limit-switch 7 is so geared as to rotate through a halfrevolution while the modified driver gear 5a makes one complete revolution.
  • the intermittent gears 5 and 9 of FIG. 1 are replaced by an ordinary pair of spur-gears 41,42 having a ratio of three to one, in which case, the barrel shaft 8 will be turned through one-sixth of a revolution while shaft 4 turns through its full half-revolution.
  • Two such motorised pattern barrels may. be operated in a step-by-step sequence in synchronism with each other and with the controlling shaft 10in the manner shown by FIG. 5.
  • the motors l and la in the manner already; described with reference to FIGS.
  • Each motor is likewise provided with a pair of contactors powered by solenoidcoils S1, S2 and S3, S4, which are selected by the handoperated double-pole change-over switch 27, according to whether the motors and the pattern barrels they drive are required to rotate in the forward or reverse direction.
  • the continuously revolving timing-cam 11 changes-over the starting-switch l2, whereupon the circuits for the selected solenoids (S1 or S2, and S3 or S4) are completed through the respective stoppingswitches 7 and 7a.
  • the motors thus simultaneously started, continue to run and to drive their respective stopping-cams 6 and 6a, which, upon completion of their allotted half-revolution, separately change-over their respective stopping-switches 7 and 7a, thereby switching-off the operative contactors and de-energizing their motors and brakes.
  • the timingcam l l continues to revolve and upon completion of its current half-revolution, the startingswitch 12 is again changed-over to initiate a further energization of the motors and, therefore, a further step in the synchronized rotation of both barrels.
  • the cloth take-up rolls may be driven by the barrel motor, or motors, in which case any convenient form of mechanical transmission, such as the driving chain C shown in FIGS. 1 and 5, may be employed to transmit the intermittent rotation of shaft 4 (or/and shafts 4a) to the take-up rolls.
  • any convenient form of mechanical transmission such as the driving chain C shown in FIGS. 1 and 5, may be employed to transmit the intermittent rotation of shaft 4 (or/and shafts 4a) to the take-up rolls.
  • the take-up rolls are independently driven by a separate motor, or motors, controlled in the particular manner described with reference to FIGS. 2 and 5.
  • the hand-operated reversing switch 27 of FIG. 5 has a separate pole for each motor to be controlled, or the motors for the barrel and take-up respectively may be separately reversed.
  • the ratio of the speed-reducing gear-box 3 and 3a is chosen so as to cause the shaft 4 to rotate one-half of a revolution during the maximum time allowable for such operation, which depends mainly upon the uniform speed of the controlling shaft 10, and the mean speed attained by the motor during its brief running periods. It has been found in practice that the motors attain their normal average speed in approximately two cycles, that is, in about 0.05 second, assuming a 50 cycles/second electric supply.
  • the improved driving means is suitable, therefore, for use on heavy and/or wide looms running at speeds up to about 60-picks per minute.
  • rotatable means and drive mechanism for effecting advance movement of the rotatable means in stepwise manner in synchronism with the operating cycle, comprising an electric circuit, an electric drive motor operably connected in said circuit, said electric drive motor being drivably connected with said rotatable means, and control means for said electric drive motor, said control means including a two-position starting switch, a two-position stopping switch arranged in sequence with the aforesaid starting switch, a first actuator means controlling the starting switch and adapted cyclically to actuate the same in synchronism with said loom cycle and at a predetermined position in said cycle, and a second actuator means operable to actuate the stopping switch upon the completion of a predetermined angular movement of said rotatable means, as initiated by actuation of the starting switch, said starting and stopping switches being so arranged that on completion of a requisite angular movement of said rotatable means the second actuator means operates to cause the stopping switch to open said
  • said second actuator means comprises a stop cam rotatable synchronously with the drive motor.
  • stop cam is an edge cam and such cam has two equal sectors of difierent radii.
  • Apparatus according to claim 1 wherein the first actuator means comprises a timing-cam drivingly connected with a continuously rotating shaft.
  • Timing-cam is an edge cam and has two equal sectors of different radii, each sector corresponding to a respective position of the related switch.
  • Apparatus according to claim 1 including a manually actuable reversing switch means for controlling the direction of rotation of the motor.
  • Apparatus according to claim 1' in combination with a second electric drive motor, rotatable means drivingly connected with said second electric drive motor and control means for, said second electric drive motor, said latter control means comprising a two-position stopping switch, an actuator means operable to actuate the stopping switch upon the completion of a predetermined angular movement of the related rotataare contacts operable to initiate operation of the elec- I tric' drive motor and wherein said two-position stopping and starting switches are included in electric circuits containing a solenoid coil or coils for effecting operation of said contacts.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US7146A 1969-03-22 1970-01-30 Looms for weaving Expired - Lifetime US3680599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1517569 1969-03-22

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US3680599A true US3680599A (en) 1972-08-01

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US (1) US3680599A (enrdf_load_stackoverflow)
DE (1) DE2006852A1 (enrdf_load_stackoverflow)
FR (1) FR2035229A5 (enrdf_load_stackoverflow)
GB (1) GB1227272A (enrdf_load_stackoverflow)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013744A (enrdf_load_stackoverflow) *
US1937401A (en) * 1930-12-30 1933-11-28 Crompton & Knowles Loom Works Reversible take-up for looms
US2421539A (en) * 1944-10-12 1947-06-03 Uxbridge Worsted Co Inc Loom reversing mechanism
US2459595A (en) * 1947-04-04 1949-01-18 Westinghouse Electric Corp Balanced loom operation
DE850729C (de) * 1942-07-19 1952-09-29 Lentz Fa S Mittels Schaltschuetz gesteuerter Webstuhlantrieb
US3356109A (en) * 1967-12-05 Driving mechanisms for loom jacquards
US3405740A (en) * 1963-09-20 1968-10-15 Alsacienne Constr Meca Drive and control system for looms
US3407848A (en) * 1966-02-24 1968-10-29 Mecaniques Verdol Soc D Device for rotating the pattern cylinder of double-lift dobbies independently of itsnormal drive
US3435854A (en) * 1965-06-04 1969-04-01 Elitex Zavody Textilniho Control apparatus for a loom

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013744A (enrdf_load_stackoverflow) *
US3356109A (en) * 1967-12-05 Driving mechanisms for loom jacquards
US1937401A (en) * 1930-12-30 1933-11-28 Crompton & Knowles Loom Works Reversible take-up for looms
DE850729C (de) * 1942-07-19 1952-09-29 Lentz Fa S Mittels Schaltschuetz gesteuerter Webstuhlantrieb
US2421539A (en) * 1944-10-12 1947-06-03 Uxbridge Worsted Co Inc Loom reversing mechanism
US2459595A (en) * 1947-04-04 1949-01-18 Westinghouse Electric Corp Balanced loom operation
US3405740A (en) * 1963-09-20 1968-10-15 Alsacienne Constr Meca Drive and control system for looms
US3435854A (en) * 1965-06-04 1969-04-01 Elitex Zavody Textilniho Control apparatus for a loom
US3407848A (en) * 1966-02-24 1968-10-29 Mecaniques Verdol Soc D Device for rotating the pattern cylinder of double-lift dobbies independently of itsnormal drive

Also Published As

Publication number Publication date
GB1227272A (enrdf_load_stackoverflow) 1971-04-07
FR2035229A5 (enrdf_load_stackoverflow) 1970-12-18
DE2006852A1 (de) 1970-10-08

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