US1901418A - Timing device for loom stop-motions - Google Patents

Description

March 14, 1933. E C, sMlTH vTIMING DEVICE FOR LOOM STOP MoTIoNs Filed Dec'.

2, 1931 2 Sheets-Sheet l IL LINGiwhnuflll:lll:Iilllllllwfmy l J1 U9 o n #ul/I I- L T* f WQ HHHIIHINMHNUIHHUD 4M March 14, 1933. E. c. SMITH 1,901,418

TIMING DEVICE FOR LOOM STOP MOTIONS Filed Deaf?, 1931 2 Sheets-Sheet 2 Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE IAINE ISLAND, .ASSIGNOB TO RHODE ISLAND PORTLAND, MAINE, A CORPORATION Ol" TIHING DEVICE FOR LOOM STOP-MOTIONS Application led December 2, 1931. Serial No. 578,491.

weaving of a fabric, and where it is desired to defer stopping of the loom or fabricating machine until the action of such machine has reached a certain point in its cycle or operation, or has reached acertain point o in one of a series of cycles.

In the accompanying drawings, the' various views represent respectively:

Fig. 1, a side view elevationof so much of a loom as is necessary to show the relation of my invention thereto and its manner of action;

Fig. 2, a plan view of so much of the loom startingand stopping-devices as is necessary to show the operation of the stopswitch;

Fig. 3, a side elevation of my timer with he cover removed and looking in the direction of the arrow a, Fig. 5, and showing the timer inactive;

Fig. 4, the same as the timer acting;

Fig. 5, a part sectional elevation on the line 5-5 of Fig. 4; y

Fig. 6, an alternative construction of the ratchet assembly;

Fig. 7, an elevation, partly sectional on the line 7-7 of Fig. 6; and

Fig. 8 is a perspective view of the spindle.

Like characters refer` to like parts, throughout the drawings and the specification. v

Referring to Fig. 1, my timer-device 2 is shown applied to one type of loom, near Fig. 3 but showing 'the foot 3 thereof. The timer 2 has a dagger 4 which extends backward toward the loom picker-stick 5 which, in turn, is

mounted on the rocker 6. A bunter 7 is also mounted on the rocker 6 and is moved thereby toward and from the timer 2 with movement of the rocker 6, the picker-stick 5 and thelay 8, all of which are moved together by well-known means. The relation of the timer 2 to the bunter 7 is such that the timer-dagger 4 is normally held just is heavier than the above the top of the bunter 7 as the latter is l moved back and forth.

The timer 2 is included in, and is a part of, an electric circuit deriving its current from a source of electrical energy 9. e-I

sides the timer 2 the circuit includes a cir.- cuit-controlling switch 10, a feeler 11, and a stop-magnet 12.

The positive side of the circuit P runs from the source of energy 9 to the switch 10. From the switch 10, the positive side P of the circuit branches, one branch P extending to and connecting with the magnet 12 and the other branch P2 extending t0 the timer 2. The negative side o'f the circuit N is grounded at a convenient point 13 in the loom side v3. The feeler 11 is connected with the timer 2 by the positive circuit wire P3. The feeler 11 closes the circuit by connecting this positive wire P3 with the loom side which is the common ground.

Referring to ger 4 is mounted on a slide 14 in a casing 15. It can swing freely in a vertical plane on a pin 16. The portion 17 of the feelerdagger which projects from the casing 15 ortion 18 which is within the casing 15. nrestrained, the heavier ortion 17 would drop and encounter the bunter 7 as the lattermoves back and forth. The feeler-dagger 4 is restrained from so dropping by the plunger 19 of a solenoid 20 mounted within the casing 15. One lead 21 of the solenoid winding extends to a ter- Figs. 3` and 4, the feeler-dagc minal plate 22 mounted on an insulating v block 23. A screw 24 extending through the back of the casing 15 serves to connect the solenoid with the branch circuit wire P and through the wire P3 with the feeler 11.

The branch circuit wire P2 from the switch 10 is similarly connected by a screw 25 with a terminal-bracket 25 to which the other lead 27 of the solenoid 20 is attached. To the terminal-plate 22A is also secured a spring-metal shunt-contact or terminal 28 which extends toward the solenoid 20. The plunger 19 of the solenoid 20 carries at its bottom a plate 29 of non-magnetic metal on which is mounted a contact-pin 30. This contact-pin 30 is guided b the bracket 31 and extends upwardly with its upper end near the shunt-contact 28. When the plunger' 19 is raised the pin 30 encounters the shunt-contact and the solenoid circuit is closed, the solenoid being maintained ener- 'gized and the circuit maintained closed by `the magnetic pull. When the solenoid circuit is opened, as by operation of the switch l 1 0, the magnetic pull ceases, the plunger 19 .pawl pushed upwardly into dro and the shunt connection is broken. en the timer-dagger 4 is released by raisi of the plunger 19, its weightier end 17 lfa into the ath of movement of the timer-bunter 7 and) is movedthereby. With the feeler-dagger 4, moves a slide 14 to which it is secured. Attached to the slide 14 is a bracket 32 having two sets of bearing-lugs 33 and 34. Between the lugs 33 is mounted a driver-pawl 35 on the Ein 36. Mounted on a similar in between t e lu 34 is an angle or be -crank member 3 Through the vertical or endant armrof the member 37 there is a. pin 38 slidably suprted thereby, the opposite end of the pm ing similarly supported by the ndant arm of an angle-plate 39. The ot er arm of the angle plate 39 constitutes one sup-y porting bearing for the slide 14, being secured to the casing 15 by screws 40. The oipposite or dagger-supportin end of the side 14 is supplorted by a p ate 41 which is secured to t e casing 15 by screws 42.

Surrounding the pin 38 is a s ring 43 which, under compression between t e angleplate 39 and the pendant arm of the bellcrank member 37, serves to maintain the slide 14 and feeler-dagger 4 ressed toward the feeler-bunter 7 and away rom the timerratchet wheel 44. In so doing, the horizontal arm of the bell-crank member 37 is pressed upwardly. Slidable in a hole in the slide 14 between the driver-pawl 35 and the horizontal arm of the member 37 is a pin which and member 37 acts to maintain the driversition to properly engage the teeth of t e ratchet wheel 44.

The ratchet wheel 44 is an element of what I term the timing unit. Itis mounted on a spindle 46 which` consists preferably of a cylindrical body, having opposed flats 47, 47; a threaded portion 48 and a reduced end or trunnion 49, see Fi 8. Mounted on the flattened portion 47 o the spindle 46 is the ratchet wheel 44 which is made from insulating material such as ber. The ratchet wheel 44 has a hub 50 with a shoulder 51 Mounted on the hub 50 arid lying a ainst a shoulder 51 thereof is a contact-dis 52 having a numberV of peripheral lobes 61, less in number than the teeth of the ratchebwheel .44. Also mounted on the hub and lying against the contact-disk 52`is a cup-shaped distributor or contact-ring 53. The contact-disk 52 and the contact-ring 53 are securedtogether and to the ber ratchet wheel 44 by rivets 54. A ber washer 55 separates the contact-ring 53 and conjoined contact-disk. 52 from the end of a boss 56 of the casing 15 in which boss, the body of the spindle 46 has a bearing. The reduced bearing portion 49 of the spindle 46 has a bearing in the plate 57 which is secured by screws 58 to the casing 15. A check-pawl 59 is also mounted on the plate 57 and is held in engagement with the ber lratchet wheel 44 by a spring 60. The lobes 61- of the contact-disk 52, overlap certain tooth spaces of the ratchet wheel 44. When the driver-pawl 35 enters a tooth space of said ratchet wheel 44 across which tooth space one of they lobes 61 of the contact-disk extends, said driver-pawl 35, in bottoming in said tooth space, encounters the lobe Y61 of the contact-disk 52. Such contact completes a continuous extent of metal, and consequently of electrical Contact, from the contact-ring 53 to the loom side 3 to which' the tlmer-case is secured and which forms the common ground for all .branches of the electrical circuit. When 4the ber ratchet wheel has turned one tooth, the driver-pawl 35 enters a tooth space, not overlapped by a lobe 61 of the contact-disk 52'A and bottoms on the ber, the continuity of metallic connection just, described will be broken. In this instance the ber ratchet wheel 44 has twelve teeth and the metal disk 52 is provided with four lobes 61. Consequently, metallic continuity occurs with every third impulse of the driving pawl 35.

Mounted on the insulating block 23 is a third terminal-plate 62 which, by means of a screw 63, is connected with "the branch circuit P4 which extends to the shunt-lead of the magnet 12. The magnet is of a well- `known type having the s ame kind of shuntunder the action of the spring 43 device as has the solenoid 20, so that once the magnet 12 has been energized it remains energized until ,the circuit has been opened or broken by the switch 10. Mounted on the terminal-plate 62, just referred to, is a contact-spring or brush 64 which touches the periphery of the cup-shaped contact-ring 53.

The action of my timer may now be described. Upon near exhaustion of filling in the loom, the feeler 11 closes the feeler circuit by grounding the branchcircuit Psi in the loom-frame 3. The loom being in operation, the feeler-bunter 7 is oscillated toward and away from the timer 2. They upper extremity of said bunter 7 passes under the end of the timer-dagger 4 when the latter is in its normal or raised position. On closing of the feeler-circuit, the solenoid 20 is energized and the resultant magnetic action raises the plunger 19, releasing the dagger 4 so its heavier end 17 falls into position to encounter the feeler-bunter 7 i on its next forward swing. The plunger 19 pulled up by the solenoid 20 brings the end of the pin 30 into position to encounter the shunt-contact 28 and the magnetic pull thereupon maintains the encounter.

Impelled by the timer-bunter 7, the slide 14 which carries the timer-dagger 4 is moved. The slide 14 under the action of the timer-bunter 7 brings the driver-pawl 35 into engagement with the fiber ratchet wheel 44 moving the latter one tooth. The checkpawl 59, falling behind a corresponding tooth of the ratchet wheel 44, holds the latter to the position to which it has been advanced. Each reciprocation of the slide 14 under impulse of the timer-bunter 7 causes the fiber ratchet wheel 44 to be advanced one tooth where it is held to the advanced position b the lcheck-pawl 59. With the relation o the components ofthe ratchet wheel assembly as shown in the drawings, at every third tooth space the 'driverawl 35 bottoms in and encounters one o the lobes 61 of the contact-disk 52. In this manner the magnet circuit P* is grounded and closed so that the magnet 12 is energized.

The magnet 12 when energized raises the stop-dagger 66 through the connections between said stop-dagger 66 and the armaturelever 67 of said magnet 12. As the lay 8 beats back, the bunter 68 carried by the lay encounters the upheld dagger 66 and acting through the lever 69, knock-olf rod 70 and dog 71, shifts or rocks the starting-handle 72 causing the loom to stop.- The handle 72 in shifting moves the .loom clutch-lever and acting on the switch 1() opensthe circuit.

The magnet 12 has the same shunt construction as described in connection with the solenoid 20. As this shunt-device is well known and is not claimed as such,.no de scription is given of its details. By its action, thev magnet is maintained energized until the circuit is broken between the magnet 12 and the source of energy 9.

The specilic purpose of my invention is to stop the loom with the exhausted'shuttle in a given box, namely, in the plain box of a 2 x 1 box-loom. The feeler is usually mounted on the breast-beam at the plain or singlebox side of theloom. The feeling action' takes place on the forward stroke or beat of the loom, the stopping or knock-off action usually occurring at or near the back stroke. The throw of the shuttle is initiated before the lay reaches V.the end of the back stroke. Consequently, should the feeler 11 effect a stopping of the loom immediately u n detection of near exhaustion of the ii ling on a bobbin, without intervention of the timer, the loom would be stopped with the shuttle at the side of the loom usually designated the box-side, `and not in the plain Aside as is desired. By my invention, the action of the feeler 11 is to set the timer 2 into action. The timer 2 simply deers the stoppinguntil the third pick after the feeling or detection occurs, which causes the nearly empt shuttle to be returned to the plain side o the loom when the latter stops.

Fig. 6 shows an alternative construction of the ratchet assembly. In this construction the fiber ratchet wheel 76 corresponds with the liber ratchet 44 already described, certain tooth spaces 77 being cut deeper than the other tooth s aces 78. The contact-disk 79 is a flat circu ar late with no lobes and of such a diameter t atthe periphery of the disk lies radially within the bottoms of the shallow tooth spaces 78 but overlaps the bottoms of the deeper tooth spaces 77. As the driver-pawl 35 advances the ratchet wheel 76, the shallow tooth spaces prevent it from reaching and touching the contact-disk 79. When a deepl tooth space occurs during the advance of t pawl 35 encounters the contact-member 79, connecting it metallically and electrically with the loom side which is the common' ground of all the circuits as described. In this alternative assembly the contact-ring is omitted, the brush or contact spring 64 bearing on the side of the disk-shaped contactmember 79 without intervention of a ring.

Without limiting myself tothe precise form and arrangement of the device, I claim:

1. In a timing device for loom stop-motions, the combination with an electro-.magnetic stop-device, and an electrical circuit therefor, of a timing unit in circuit `with e ratchet wheel 76, the driversaid sto device, contact means incorporated with said timing unit for closing the circuit and constituting one terminal thereof exposed at intervals by turning the timing unit a driving member constituting the other terminal of the electric circuit to turn the timing unit and at the stated intervals' encounter the exposed contact means to close the circuit, and means to impel the driving member. I

2. In a timing device for loom stop-motions, the combination with an electro-magynetic stop-device and an electrical circuit therefor, one side of which circuit terminates 1n a common ground, of a rotatable terminal for said circuit, means for exposing said roy tatable terminal during some intervals of rotation and for-shielding it during other inlao' tervals, a driver to advance the exposing and shielding means and to'make contact with the rotatable terminal when exposed, which driver is connected with the common ground andconstitutes the terminal of the grounded side of the circuit, and means to actuate the driver to rotate the rotating terminal and its exposing and shielding means, and at times to contact with the rotatable terminal to close thecircuit.

3. The combination in a timin device for loom stop-motions with an electrical circuit a driving-pawl constituting one terminal oi the circuit and means to drive the pawl, of a ratchet wheel not included in the circuit and driven by said pawl, and a rotating terminal lfor the other side of the circuit which rotating terminal is rotated by and with the ratchet' wheel aforesaid when advanced by the pawl, the pawl making contact with the rotatin terminal at intervals in the rotation of sai I ratchet wheel toclose the circuit. a

4. The combination in a timing device for loom stop-motions with an electrical circuit, a terminal for one side of the circuit which terminal has a reciprocating movement and means to impart such reciprocating movement to said terminal, of a terminal for the other side of the circuit which y terminal is normally out of contact with the reciprocating terminal, and means o rated by said reciprocating terminal to periodicall permit contact o said terminals to close the circuit and at intervening times prevent such contact to maintain the circuit open.

5. In a timing device for electrical stopmotions, the combination with an electrical circuit' to be closed, a rotating timing unit and reciprocating means to rotate said unit to close and to open said circuit, of a continuously moving bunter, a dag er carried adjacent the path of movement o the bunter by said reciprocating means, means to restrain said dagger -from engaging the bunter, a solenoid. to release said restraining meansand permit the dagger to fall into engagement with the bunter so the latter actuates the reciprocating means, an auxiliary circuit to energize the solenoid, and means to close said auxiliary circuit.

6. In a timing control for the timing device of a loom stop-motion,'the combination with a stop-motion circuit, of a rotatable terminal for one side of said circuit, a reciprocating terminal for the other side of the circuit, a member that carries the rotatable terminal which member is engaged by'and advanced rotatively by said reciproeating terminal and at intervals in such rotative advance presents the surface of the rotatable terminal to the reciprocating terminal, and means to operatively move the reciprocating terminal to turn the rotatable terminal and at intervals make contact therewith to close the stopfmotion circuit,

cable means, but normally restrained from such engagement, electro-magnetic control to restrain and to release said dagger, an auxiliary circuit for the electro-ma etic control, and means to close said auxiliary cir 1zuit to energize said electro-magnetic contro 8. In a timing device for electrical stopmotions, the combination with the stop-motion magnet and circuit therefor, of a rotatable timing unit to intermittently close said circuit, a pawl movable to advance said unit rotatively, a slide to carry and reciprocate the pawl, a dagger carried by the slide `and free to drop when unrestrained, an electro-magnetic control for the dagger, an auxiliary circuit for the control, means to close said auxiliary circuit to release the dagger and permit it to drop, a reciprocating bunter to encounter the dropped dagger and through it communicate the reci rocatin movement of the bunter to the side, an means to reciprocate said bunter.

9. In a timing device for loom stop-motions, the combination with an electro-ma netic stop-device and an electric circuit therefor, of a timing unit in circuit with said stop-device, contact meansincorporated with said timing unit for closing said stopmotion circuit, another electro-magnetic device to cause the tiinin unit Jvto act, and means intermediate said evice and said unit to secure such action.V

10. In an electrical stop system for looms, the combination with the stopping apparatus of a loom, of an electro-magnetic device for actuating the stopping apparatus of the loom, means to operatively connect said ap aratus and device a feeler for initiating t e action of said electro-m etic stoppin device, electric circuits for said device an feler, a common source of electric current to serve said circuits, a timing unit operative from the loom action to close the, e ectro-magneticstopping circuit at la of a definite interval after the feeler action, a second electro-magnetic device in the feeler circuit to control the timer unit-from the feeler, and means controlled by the second electro-magnetic device for transmitting the loom action to the timer unit. n f

In testimony whereof I hereunto ailix my signature.

EDWIN C. SMITH.

7. In a timing device for electrical stop motions, .the combination with the stop-motion magnet and circuit therefor of a rotatable timing unit to intermittently close said circuit, reciprocable means Ato rotate said timing unit, a bunter reciprocating adjacent said reciprocable means, a dagger engageable with said bunter to communicate reciprocation of 'the bunter to the recipro-

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