US3625243A - Time cycle warp-stop motion control for weaving looms - Google Patents

Time cycle warp-stop motion control for weaving looms Download PDF

Info

Publication number
US3625243A
US3625243A US11241A US3625243DA US3625243A US 3625243 A US3625243 A US 3625243A US 11241 A US11241 A US 11241A US 3625243D A US3625243D A US 3625243DA US 3625243 A US3625243 A US 3625243A
Authority
US
United States
Prior art keywords
solenoid
loom
circuit
switch
controlling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US11241A
Other languages
English (en)
Inventor
Harry P Hansen
Warren A Barber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SSMC Inc
Original Assignee
Singer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Singer Co filed Critical Singer Co
Application granted granted Critical
Publication of US3625243A publication Critical patent/US3625243A/en
Anticipated expiration legal-status Critical
Assigned to SSMC INC., A CORP. OF DE reassignment SSMC INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping

Definitions

  • the RC circuit is adjusted so that a definite charging time must elapse after the opening of the [56] defences cued drop wire contacts until the flip-flop changes state to gate the UNITED STATES PATENTS SCR into conduction.
  • This time is made longer than the time 3,530,690 9/1970 Nickell etal 66/163 ofa p y of the loom 3,498,339 3/1970 Davis et al. 139/336 START l ⁇ (48 42 53 A P 56 I 1%25 47 36 5e 5
  • the circuit is powered directly from a low-voltage AC supply bypassing any shipper handle switch.
  • Solenoid deenergization is controlled by the closing of drop wire contacts and is maintained for a time beyond the opening of said contacts by a timed-cycle circuit.
  • the latch-out will remain in effect for the duration of the drop wire contact plus a definite time delay longer than the loom pick cycle.
  • the solenoid will remain deenergized long enough to provide a controlled stop whether or not the drop wire remains in solid contact.
  • the solenoid is already energized and the knockoff linkage is cleared before shipper handle engagement is attempted and without requiring any critical mechanical adjustment of a switch with respect to shipper handle movement.
  • FIGURE of the drawing is a wiring diagram of the circuit of this invention applied to a conventional loomstop motion indicated schematically.
  • a conventional loom shipper handle which is shown in off position, may be moved in the direction of the arrow shown to start the loom for normal running.
  • a loom shaft 11, provided with a cam 12 in conventional manner operates a knockoff mechanism, indicated schematically as 13, when the high point of cam I2 engages a push rod 14 to actuate rod 15 which knocks the shipper handle 10 to off position and shuts down the loom.
  • the function of the knockoff mechanism 13, which is conventional, is to provide engagement or disengagement of the rods 14 and 15 responsively to the actuation of the armature 16 of solenoid 17 through a mechanical linkage 18.
  • a source 8-8 of low AC voltage supplies voltage to lines 20-21.
  • a silicon-controlled rectifier (SCR) 22 functions as a controlled switch has its anode 23 and cathode 24 connected in series with the solenoid l7 and a diode 25 across lines 20-21.
  • the diode 25 is used in conventional manner to protect the SCR 22 from reverse anode voltages.
  • a conventional freewheeling diode 26 shunts the solenoid l7 and provides a path for forward solenoid current during the time period between conducting positive half-cycles. When proper voltage is applied to the gate 27 of SCR 22 it conducts half-wave rectified AC through the solenoid 17. When this gate voltage is removed, the SCR 22 turns off by virtue of the zero voltage level at its anode 23 at the beginning of the next negative cycle in a well-known manner.
  • a diode 28, resistor 29 and capacitor 30 provide a DC voltage source at junction 31 for the gate 27 and the control circuitry.
  • Transistors 32 and 33 and associated circuitry provide a high-hysteresis flip-flop which snaps" from one state to the opposite state responsive to highand low-limit threshold voltages developed at a control point 34 as will be described subsequently.
  • transistor 32 is saturated and transistor 33 is cut ofi.
  • Current for the gate 27 is then provided from junction 31 through resistors 35 and 36.
  • Resistor 37 is a gate-to-cathode shunt provided for SCR stability as is well known.
  • transistor 32 For as long as transistor 32 remains saturated, all drive to the base 38 of transistor 33 is removed by the low impedance of the path between the collector 39 and emitter 40 of transistor 32 whereby transistor 33 is kept fully cut off. In this state, transistor 32 is kept saturated by current supplied to the base 41 from junction 31 by two paths.
  • the second path, through resistors 35, 46 and diode 47, constitutes the latching path.
  • the switch 48 represents the drop wire contacts which are in common usage on looms to detect warp thread breakage.
  • the function of switch 48 is to close responsively to warp breakage but obviously can be made to close responsively to any loom malfunction it is desired to detect.
  • the AC voltage from 5-8 is applied to resistor 49.
  • the next negative half-cycle of voltage from S-S reaches a value sufficient to overcome the breakdown voltage of Zener diode 50 and the forward voltage drop in diode 51, discharge current rapidly flows out of capacitor 45 (which has previously been charged with the polarity shown) and discharges it.
  • the diode 52 clamps the voltage at the control point 34 to eliminate large negative excursions thereof.
  • both the timing path 42, 43 and 44, and the latching path 35, 46 and 47 are so severely shunted that all current is diverted from the base 41 and transistor 32 comes out of saturation.
  • the voltage at collector 39 rises and applies base current drive to base 38 (limited only be resistor 54) thus bringing transistor 33 out of cutoff.
  • the voltage at its collector 55 decreases further removing the latching current through resistor 46 and diode 47 to base 41.
  • Resistors 56 and 57 constitute a voltage divider for the voltage at 31 and provides a reference voltage at point 60 for comparison with the voltage at control point 34.
  • Resistors 56 and 57 constitute a voltage divider for the voltage at 31 and provides a reference voltage at point 60 for comparison with the voltage at control point 34.
  • the flipflop action of transistors 32 and 33 is responsive to two critical threshold values of the voltage at control point 34. Above a certain value, say 2.2 volts, at point 34, the solenoid will be energized and below a lower value, say 0.6 volts, at point 34, the solenoid will be deenergized. Between these two values, the solenoid can be either energized or deenergized depending on its previous condition.
  • the voltage at point 34 can vary from substantially 0 volts (when capacitor 45 is discharged) to that voltage determined substantially by the voltage of junction 31 and the ratio of resistors 56 and 57 modified somewhat by diode and transistor junctions.
  • rate of discharge of capacitor 45, initiated by closure of switch 48 can be made such that the time for the voltage at 34 to drop 0.6 volts can be very small in which case the solenoid 17 is deenergized substantially simultaneously with closure of switch 48.
  • rate of charging of capacitor 45, initiated by opening of switch 48 can be made such that a definite predetermined time must elapse for the voltage at point 34 to rise from 0 to 2.2 volts, in which case the energization of the solenoid 17 takes place at a definite time delay after the opening of switch 48.
  • the time delay is set at 750 milliseconds which insures a controlled stop for any opening of the switch 48 and for even a momentary loss of power.
  • the time delay may be chosen, in any specific case, to be sufficiently longer than the pick-cycle time to attain the above-desired results in accordance with the teachings of this invention.
  • a circuit for controlling the energization of the solenoid from a voltage source comprising:
  • c. means applying a signal to said controlled switch sufficient to cause it normally to conduct and energize said solenoid
  • switch means actuated to a first position responsive to a loom malfunction for removing said gating signal and deenergizing said solenoid
  • a flip-flop having two stable states controls respectively the application and removal of said gating signal to and from said controlled switch
  • a circuit for controlling the energization of the solenoid from an AC voltage source comprising:
  • a flip-flop having two stable states controlling respectively the application and removal of a DC conduction gating signal to and from the controlled rectifier
  • nonnally open switch means actuated to closed position responsive to loom malfunction

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US11241A 1970-02-13 1970-02-13 Time cycle warp-stop motion control for weaving looms Expired - Lifetime US3625243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1124170A 1970-02-13 1970-02-13

Publications (1)

Publication Number Publication Date
US3625243A true US3625243A (en) 1971-12-07

Family

ID=21749479

Family Applications (1)

Application Number Title Priority Date Filing Date
US11241A Expired - Lifetime US3625243A (en) 1970-02-13 1970-02-13 Time cycle warp-stop motion control for weaving looms

Country Status (6)

Country Link
US (1) US3625243A (enrdf_load_stackoverflow)
BE (1) BE762898A (enrdf_load_stackoverflow)
CA (1) CA938015A (enrdf_load_stackoverflow)
DE (1) DE2105669A1 (enrdf_load_stackoverflow)
FR (1) FR2079411B1 (enrdf_load_stackoverflow)
GB (1) GB1299025A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714972A (en) * 1971-06-18 1973-02-06 Singer Co Shuttle boxing detector for fly-shuttle looms
US3788363A (en) * 1971-08-05 1974-01-29 Stop Motion Devices Corp Control means for textile producing machines
JPS50138173A (enrdf_load_stackoverflow) * 1974-04-29 1975-11-04
US3929171A (en) * 1974-11-27 1975-12-30 Rockwell International Corp Fail safe stop motion for looms
FR2464321A1 (fr) * 1979-09-03 1981-03-06 Saurer Ag Adolph Casse-chaine electrique de machines a tisser

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531944A (en) * 1946-02-04 1950-11-28 Arthur G B Metcalf Textile machine
US3343158A (en) * 1964-03-04 1967-09-19 Stop Motion Devices Corp Electronic control for fault detection and stop-motion system
US3373773A (en) * 1965-07-12 1968-03-19 George H. Balentine Jr. Loom
US3498339A (en) * 1968-08-30 1970-03-03 Singer Co Fail safe warp stop circuit
US3529444A (en) * 1967-03-07 1970-09-22 Billi Spa Circular knitting machines
US3530690A (en) * 1968-03-29 1970-09-29 Appalachian Electronic Instr Yarn inspection apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531944A (en) * 1946-02-04 1950-11-28 Arthur G B Metcalf Textile machine
US3343158A (en) * 1964-03-04 1967-09-19 Stop Motion Devices Corp Electronic control for fault detection and stop-motion system
US3373773A (en) * 1965-07-12 1968-03-19 George H. Balentine Jr. Loom
US3529444A (en) * 1967-03-07 1970-09-22 Billi Spa Circular knitting machines
US3530690A (en) * 1968-03-29 1970-09-29 Appalachian Electronic Instr Yarn inspection apparatus
US3498339A (en) * 1968-08-30 1970-03-03 Singer Co Fail safe warp stop circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714972A (en) * 1971-06-18 1973-02-06 Singer Co Shuttle boxing detector for fly-shuttle looms
US3788363A (en) * 1971-08-05 1974-01-29 Stop Motion Devices Corp Control means for textile producing machines
JPS50138173A (enrdf_load_stackoverflow) * 1974-04-29 1975-11-04
US3929171A (en) * 1974-11-27 1975-12-30 Rockwell International Corp Fail safe stop motion for looms
FR2464321A1 (fr) * 1979-09-03 1981-03-06 Saurer Ag Adolph Casse-chaine electrique de machines a tisser
US4372346A (en) * 1979-09-03 1983-02-08 Aktiengesellschaft Adolph Saurer Electrical warp thread-monitoring apparatus for a loom

Also Published As

Publication number Publication date
BE762898A (fr) 1971-07-16
FR2079411B1 (enrdf_load_stackoverflow) 1974-02-15
DE2105669A1 (enrdf_load_stackoverflow) 1971-12-09
GB1299025A (en) 1972-12-06
FR2079411A1 (enrdf_load_stackoverflow) 1971-11-12
CA938015A (en) 1973-12-04

Similar Documents

Publication Publication Date Title
US3549955A (en) Drive circuit for minimizing power consumption in inductive load
US3333175A (en) Machine tool timer
US3944889A (en) Short-circuit protection circuit
US2803814A (en) bloser
US3625243A (en) Time cycle warp-stop motion control for weaving looms
US3193733A (en) Counter driving circuit
US3743860A (en) Full cycle synchronous-switching control circuit
US3339110A (en) Relay circuits
US3643405A (en) Circuit arrangement for automatic control of the voltage of an electrical filter
US3498339A (en) Fail safe warp stop circuit
US3761738A (en) Remote control electrical circuit
US4344102A (en) Anti-telegraph control circuit for electromagnet coil
US2981296A (en) Electric protection for loom
US3265938A (en) Actuator circuit for electromagnetic devices
US4322637A (en) Solid state switch
US3758793A (en) Synchronous switching circuit
US3788250A (en) System for stopping sewing machine needle at predetermined position
US2988688A (en) Control circuits
US2767351A (en) Electronic control circuit
US3475625A (en) Delay control circuit
US2546617A (en) Electric weft detecting system for looms
US2410687A (en) Stopping mechanism for weft replenishing looms
US3356910A (en) Integrated power controlled solenoid
US3714972A (en) Shuttle boxing detector for fly-shuttle looms
US2431650A (en) Electric weft detecting system for looms

Legal Events

Date Code Title Description
AS Assignment

Owner name: SSMC INC., A CORP. OF DE, CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINGER COMPANY, THE;REEL/FRAME:005041/0077

Effective date: 19881202