US2271178A

US2271178A - Stop motion

Info

Publication number: US2271178A
Application number: US309009A
Authority: US
Inventors: Conrad C Blom
Original assignee: Bigelow Sanford Carpet Co Inc
Current assignee: Bigelow Sanford Carpet Co Inc
Priority date: 1939-12-13
Filing date: 1939-12-13
Publication date: 1942-01-27
Anticipated expiration: 1959-01-27

Description

C. C. BLOM STOP MOTION Jan. 27, 1942.

Filed Dec. 13, 1939 M N N n Will INVENTOR Conn-ma C. BY ATTORNEY Fatented Jan. 27, 1942 Conrad C. mom, Longmjeadow, Massi, assignor to Bigelow-Sanfor'd' Carpet'Co. Inc.,' Thompsonville, Conn.,:a' corporationrorMassachusetts,a

"Application December 1es9, seri 1;no; 309,009

g 12 Claims; This invention relates to automatic stop mo tionsand its object is to provide a stop motion, that has certain-delayed actuations, effected in'.. I a novel manner, so that slack in the ,yarn upon starting, or during, the run will not be effective leads areconn'ected to a self-maintaining magnetic switch 46 and thence througha reversing switch 48 to the. motor 2} For the purpose of closingIand holding closed the switch 46, I proto stop the machine automatically unless the slack persists or a breakage occurs and so that once the-machine has been stopped automatically .it-cannot thereafterbe started immediately, but oto induce theoperative to, tie in the broken end the starting will bedelayed fora sufiicient time rather than merely to thread it into the winding.

21, 1935, for Axminstersettingframes.

.' rweaving.mechanism. I a a This'japplication. is a continuation in part ofvv my prior application Ser. No. 45,838 filed October ;,A stop motion embodying my invention is adapted for use not only on .a setting or winding frame, as shown in my priorapplication, but

on any type of machine, such as warp beamers, .ilooms, etc. which advance strands 110i yarn and -Which it is desired to stop automaticallywhenever one of the strands breaks.

j The drawing is a diagramof apparatus em bodyingmy invention and for purposes-of illus tration I have shown anzAxminster spool windplication. Such a machine has three winding driven-from a motor 2 by means of gearing diagrammatically illustrated at 4, 6 and-8.

.ing frame of the type illustrated in my prior ap I rolls H), l4 and 16 disposed in peripheral en-, gagement with the spool I2 to=be wound with yam 20, one, or more of which rolls is power tide a holding] coil whichyupo'n' beingenergiz d, attracts the switch rod 62 to close the ,-"switchf4 'li across the"three phase leads, The coil 60 is in circuit with'the lead 42 through the jli ne 64. and ,is connected bythe line '66 to the terminal 'llen'gaged by the'armature 1210f relay 14 which is-normally maintained in closed position acrossterminalslfl and "to complete the circuitfrom the lead 66 to the lead 18 connected to momentary contact swit'ch' 82. Lead connects wire 18 tothe terminal Q8] disposed adjacent aswitch bar80 mounted onfbar .62 which closes circuit between the terminal 81 and a terminal 92 connected by wire 94 to lead 441 The other terminal of switch 82is connected by wire 88 to-power main 44 above switch I46.

-With the device wiredas aboye jdescribed, a momentary closing of the starting switch 82, which in practice maybe afoot operated press I button, closes thelcir'cuit from power main 44, through lines 88, I8 and 66to holding coil 68 and, by means-of the wire '64, back to the power main, 42, thereby energizing the coil which attracts switch rod 62 to close the magnetic switch, 1wherebyto start the motor .2. The..starting switch 82' maybe instantlyr'ele'asedbecause the holding circuit through bar'.90',and lines'f85, 18

' and will be established.

Apparatus embodying my invention includes a set of drop "wires'pref-erably adapted to closean', --'electric circuit when anyone of thethreads.

- breaks. Any conventional type ofdrop wire can be used, but for-purposes of illustrationI have vshown a set of pivoted mounted on a-shaft 26 and having yarn engage,

fingers 24.. rotatably ing portions 28 that project through the in.-

spective finger falls into electrical engagement with conducting bar 32 mounted onan isulating v 7 .block 33 and connected to awire 36. The shaft 26 on which the fingers are'pivotally mounted is connected to a wire 34 and each of the fingers 1 is in electrical contact with the shaft 26, so that ,7 when a yarn strand breaks and the-finger falls circuit is completed from wire 34 to wire 36.

,terdental spaces of: a reed 30 and aredepressed V as shown when the yarn is taut.- When a yarn strandbreaks, the weighted, end 24a,of its re- [The line 34 which, as above described, is connected in series with line 36 whenevera thread breaks or slacks unduly and av drop wire makes contact with bar 32,}is connected to thefsecondary of a step down transformer connected v,by wire 102 with the solenoid I04. of a relay I06,

the armature I08 of which is normally spring pressed to open position away from the terminals H0 and; 2.. The circuit through "the coil l04fis completed by the aforesaid wire 36 leading to the conductor bar 32.

3 The primary v.l2ll of the transformer isconnected by line I22 to the power main 42 between the magnetic switch46 and motor 2. The other terminal of the primary. is connectedby line I24 toline I38 and thence to power main 44 and l The numerals 4D, 42 and 44 indicate power mains leading from a suitable source of power suchas'a three phase sixty cycle current. The,

it' is thus apparent that when the magnetic switch 46 is closed an electric circuit is established through the primary" 128 of the transformer. v I The aforesaid armature I08 of relay I06, upon being elevated, closes circuit across terminals f I I0 and H2, thelat ter of which is connected to power line 42 by means of the wire I30 connected to the wire I22. The other terminal I I of relay I06 is connected by the wire I34 to the coil I36 of the aforesaid relay 14, the circuit through which is completed by means of the wire I36 which leads to power main 44.

The relays I06 and I4 are both time delayed relays and each is provided forthis purpose with a dashpot which may be of well knownconstruction. Because of the dashpot I40 the relay I06, upon being energized, takes a brief period such as two secondssfor the armature I06 to close across the terminals 0 and H2. The

-relay I4, on the contrary. is normally maintained in closed position and when it opens, through energizing of the coil I36, it opens instantly. It

is provided, however, with a dashpot I44, whereby when coil I36 is thereafter de-energized the movement of the armature I2 to-closed position is delayed and takes a period such as ten seconds until electrical contact is made.

said power operated means automatically when a wire tails as the result oi broken or slacked yarn, a movable element advanced automatically when the power operated means is stopped by a fallen ,wire and means to prevent re-starting of said power operated means until said movable element has advanced for a, predetermined time interval. i 4

2. In a stop motion, the combination of power operated means for advancing yarn, stop motion drop wires engagingathe yarn, a relay, a circuit for actuating said relay which is closed when a wire falls as the result of broken or slacked yarn, terminals on saidrelay, an armature on said relay for electrically bridging said terminals, said relay having a delayed action so that said bridging occurs at a predetermined delayed time int'erval after said circuit is closed V and means for stopping said power operated with the device constructed as above described,

momentary closing of contact switch 62 closes magnetic switch 46 to start the motor and encrgize the primary I20 of the transformer. When a finger 24 electrically contacts bar 32, circuit is completed through secondary I00 of the transformer energizing coil I04 of relay I06 and at-' ating the same, a relay in-said circuit, means for means automatically bridged.

3. In a setting frame, the combination of feed rolls for winding-yamon areceiver, electrically when said terminals are operated means for driving said rolls, an electric circuit connected to said driving means for operclosing said relay. a relay circuit for opening said tracting .armature I08. After a brief interval of two seconds or so, contact is made across terminals I I0 and I I2 so that coil I36 of relay I4 is energized, immediately breaking circuit across terminals I0 and I6 to de-energize holding coil 60 and permit the switch 46 to open through the action of spring 86, stopping the motor.

If at the start of, or during, the run, the yarn momentarily becomes sufiiciently slack so that one or more of the contact fingers'engages'bar 32, the motor wiilnot stop immediately but will continue to run for whatever period the dashpot I40 of relay I06 is set, in this instance two seconds. That period is suflicient for any amount of slack less than that for which the machine coil I04 is again broken and thearmature I00:

relay, switch means in said relay: circuit, means connected to said-switch means and engaging the yarn adapted to maintain in open position the switch means when the yarn is taut and to close said switch means when the tension in the yarn is released, means included in "saidrelay circuit adapted to delay the completion of the circuit when the switch means is closed whereby to permitcontinuation of the power-driven means for i a limited predetermined time after the tension retracted without having contacted the terminals.

cally as a result oi'excessive slack or a broken warp, the armature I2 of relay "4 will be fully in the yarn is released and means for retarding the closing of -the'said relay upon the'opening of said relay circuit whereby to render inoperative the said electrically .operated'means for a predetermined period of time after the opening of said switch means i '4. In a stop motion, the combination of power operated means for advancing yarn, stop motion' drop wires engaging the yarn and adapted to fall as the result of broken or: slacked yarn, means for stopping said-power operated means when a drop wire has remainedin fallen position for a predetermined length oftime and means for continuing 'the operation of said power operated retracted from the terminal I0 and 16 and will not return to engagement with the terminals for an adjustable period, in this instance ten seconds. As a result, the operative cannot, immediately the machine is stopped, step on the starting button 62 and run the machine, threading the broken end by hand, but is required to wait for a period juntii armature I2 returns to engaging contact with'its terminals. Thereby the operative is induced to tie in the broken warp ends; After this brief period has elapsed closing the switch 82 will immediately startthe motor 2.

My invention, the preferred embodiment of which has now been described, is not to be limited to any details above described, but may be varied to suit the needs of individual users. Thus, the

means if thewire is restored from fallen position within said time. I

time-periods involved in the delayed relay actuations may, 01' course, be varied at will. My invention is to be limited only as indicated in the appended claims.

I claim:

V 1. In a stop motion, the combination of power operated means for advancing yarn, stop motion drop wires engaging the yarn, means for stopping 5. In a stop motion, the combination'of power operated means for advancing yarn, stop. motion drop wires engaging the yam and adapted to fail as the result. of broken or slacked yarn, a movable element actuatedto measure time by the falling of a drop wire, means for stopping the power operated means after said time measuring element, has advanced for a predetermined time from an initial position, and means restoring said time measuring element to said .initial position when a wire is-raised'from fallen position within said predetermined time. i

a 6. In a stop motion, the combination of power operated means for advancing yarn, stop motion drop wires engaging the yarn and adapted to fall as the result of broken or slacked yarn, a,

' interval by advance of. the element from an initial 0 position toward a predetermined advanced position, means for stopping the power operated means when the said element reaches its ad--- vanced position and means for restoring said ele-.

ment to its initial position if said fallen wire is raised before the elementreaches its advanced position,

'7. In a stop motion, the combination of power operated means for advancing yarn, stop motion drop wires engaging the yarn and adapted. to fall as the result of broken or slacked yarn, an electric circuit for operating said power operated means, a second circuit adapted, when completed, to interrupt the circuit operating said power operated means, a switch in said second circuit, a time measuring element adapted to advance in a predetermined time interval from a retracted position to an advanced position and to close said switch upon reaching'said advanced position, means for starting the movement of said element to measure said interval upon the falling of a drop wire, and means restoring saidtime measuring element to initial position upon the raising of a wire from fallen position within said predetermined time interval whereby when a wire thereafter falls said power operated means will not be stopped until said predetermined time interval has thereafter elapsed.

8. In a stop motion, the combination of means for advancing yarn, a power source connected to said means to operate the same, stop motion drop wires engaging the yarn and adapted to fall as the result of broken or slacked yarn, a time measuring element movable from an initial position toward a predetermined advanced position to measure a predetermined time interval, means for starting the time measuring movementof said element upon the falling of a wire, means for interrupting said power source to'stopvthe run of yarn when said element reaches its advanced position, means for restoring said element to its initial position if said fallen wire is raised before the element reach'es its advanced position, a second movable time measuring element, means for'actuating said second element to commence the measurement of another predetermined time interval upon the interruption of said power source and means for maintaining the power source interrupted until said other time interval has been measured by said second element to prevent restarting of the run of yarn during said other interval.

'9. In a stop motion, the combination of stop motion drop wires, electrically operated means for advancing yarn, an electric circuit. connected to said means for driving the same, a relay adapted, when opened, to interrupt said circuit,

a relay circuit for opening said relay, a switch in said relay circuit, a movable time measuring element adapted to'advance in a predetermined time interval from a retracted position to an advanced position and to close said switchto complete said relay circuit upon reaching said advanced position, means for starting the movement of said element to measure said time interval upon the falling of a drop wire, means restoring said time-measuring element to initial position upon the raising of a drop wire from fallen position within said predetermined time for retarding the closing of interval and means the opening of said switch the said relay upon whereby to render inoperative the said electrically operated means for a predetermined period of time after the opening of said switch.

10. In a stop motion, the combination of means for advancing yarn, a power source connected to said means to operate the same, means for interrupting said power-source to stop the run of yarn automatically as the result of yarn slack or breakage, a time measuring element automatically actuated to commence the measurement of a predetermined time interval upon the interruption of said power source, said element including means for maintaining the power source interrupted while said time interval is being measured by said element to prevent restarting of the run of yarn during said interval.

11. In a stop motion, the combination of power operated means drop wires engaging the yarn and adapted to fall as the result of broken or slacked yarn, an electric circuit adapted when closed to operate said power operated means, a and a relay for opening said switch to stop said power operated means automatically as the re-' sult of a fallen drop wire, said relay including means for closing said "switch at a predetermined time interval after it has been automatically opened.

12. In a stop motion, the combination of means for advancing Qyam, apower source connected to said means' to operate the same, means for interrupting said power source to stop the run of yarn automatically as the result of yarn I slack orbreakage, and means for maintaining said power source.

the power source interrupted during a predetennined time interval thereafterv including a time measuring element automatically actuated to commence the measurement of said predetermined time interval upon theinterruption o! comm: c. BLOM.

for advancing yarn, stop motion switch in said circuit,