US2361145A - Stop motion for double cylinder jacquard looms - Google Patents

Description

Oct. 24, 19 K. v. MGCALEB STOP MOTION FOR DOUBLE CYLINDER JACQUARD LOOMS Filed. March 2, 1944 FM 7 I 1 Patented Oct. 24, 1944 STOP MOTION FOR DOUBLE CYLINDER JACQUARD LOOMS Kenneth V. McCaleb, Elberton, Ga., assignor to United Merchants & Manufacturers, Inc., Wilmington, Del., a corporation of Delaware Application March 2, 1944, Serial No. 524,732

Claims. (Cl. 139-338) In the operation of double cylinder Jacquard looms it is of the utmost importance that the socalled odd and even cards of the two pattern card series follow one another in correct sequence, that is, that they alternate one odd, one even, one odd, and so on; otherwise, of course, a defective pattern results. And even when the work is under close observation by a skilled weaver it is more or less difficult, depending, for example, upon the pattern being woven to detect promptly when the cards are alternating out of time. On occasion the error is not even discovered until the completed fabric is later inspected and in any event considerable stretches of fabric are thus frequently woven imperfectly with consequent loss.

The object of the present invention is to provide relatively simple and effective means for automatically stopping the loom with reasonable promptness when the cards are alternating any predetermined number of steps out of time, and this is accomplished, in general, by providing two independently operable members adapted to effeet the stopping of the loom when simultaneously active and by controlling the operation of such members, one by the odd card series and the other by the even card series, in such manner that the two members are simultaneously rendered active when the cards are alternating out of time.

For purposes of illustration the invention is shown more or less diagrammatically, Fig. 1 of the drawing showing so much of a double lift double cylinder Jacquard as is necessary to an understanding of the invention and Fig. 2 showing the control mechanism in perspective on a much enlarged scale.

In Fig. 1 the reference characters I and 2 desnate respectively the odd and even cylinders over which pass the odd cards 3 and the even cards 4.

As usual, the odd cards control a bank of needles 5 and the even cards a bank of needles 6, the needles in turn controlling the two series of hooks I and 8, respectively. The two grifis are marked 9 and I0, and the comber board is generally designated by the reference I I.

As is well understood, the pattern cards are variously perforated, and when applied to the needles the perforations telescope over the needles aligned with such perforations and leave the corresponding hooks in position to be raised by their griff bars; while the imperforate areas engage the needles aligned with such areas, thrust the needles longitudinally, and thereby flex the 55 corresponding hooks laterally to clear their griff bars.

In the embodiment of the" invention illustrated, -a circuit [2 is provided which, when energized, operates to stop'the loom through any appropriate relay mechanism l3 or otherwise; and in series in this circuit are arranged two independently operable switches. As shown, the switches are mounted on a suitable support l4 secured, as by bracket 15, to the underside of the comber board. The circuit leads are brought to two spring contact members l6, ll which are insulated from one another, and the switch elements comprise two long contact bars [8, l9 guided in brackets and 2|. The contact bars are bridged by a spring contact 22 and are biased, as by springs 23, to their lower or open circuit position, as illustrated. When both contact bars are raised they wipe across their respective contacts IS, IT and circuit I2 is closed and the loom brought to rest.

The switch bars are arranged to be controlled by the Jacquard mechanism; and, to that end, the eye 24 in the-top of bar 18 is tied by a line 25 to any available hook 26 of the even card series and the eye 21 in the top of bar I9 is tied by line 28 to a hook 29 of the odd card series, the hooks 26 and 29, and their respective control needles 30 and 3| being in turn controlled by registering perforations in certain cards of the two series.

According to the present invention, certain of the cards of the odd series are perforated or cut in alignment with needle 3|, and when each such perforation telescopes over that needle, the raising of the griif bars 9 will serve to raise switch bar I9 and engage it with contact I1. Similarly, certain cards of the even card series are perforated or cut in alignment with needle 30, so-that when each such perforation telescopes over that needle the raising of grifi" bars Ill will serve to raise switch bar I 8 and engage it with contact l6. It is understood, of course, that the griffs. operate alternately, griff 9 rising after cylinder I has come in and then falling coincidently with the rising of griff l0 after cylinder 2 has come in.

It will be noted that the contact bars start to wipe over their respective contacts l6, ll at the beginning of their upward movement and continue so to do throughout the remainder of their stroke. In other words, their actions overlap, so that when one bar is, say, half way up on its upward stroke and the other half way down on its downward stroke, the circuit will be closed. It will be understood, therefore, that whenever one of the odd cards perforated as above mentioned is followed in sequence by an even card likewise perforated, the two switches will both be closed (due to their overlapping action) and the loom brought to rest.

Accordingly, such of the cards are perforated that when the two series are alternating in time, i. e. in proper sequence, at least one unperforated card of one series always follows a perforated card of the other series, with the result that the two contact bar are not both in their circuit closing positions at the same time and the loom continues to run. Conversely, such of thecards are perforated that when the two series are not alternating in true sequence, a perforated card of one series is followed by a perforated card of the other series, with the result that the two contact bars are in their circuit closing positions at the same time and the loom is stopped.

Within these principles many cutting or perforating combinations of the cards will be seen to be possible and for purposes of illustration only, a particular combination suitable for stop ping the loom with reasonable promptness when either set of cards is one, two or three steps out of time will be briefly described.

For example, the perforations in the odd numbered cards (controlling needle 3|, hook 29 and bar l9) may be cut in card Nos. 1, 9, 17, 25, etc.; and the perforations in the even numbered cards (controlling needle 30, hook 26 and bar 18) may be cut in cards Nos. 4, 6, 12, 14, 20, 22, etc. This should be three steps out of time, the cards will come into action as follows:

l83105 1g7 ligetc.

A before, the loom is automatically. stopped, in this instance by the simultaneous closure of the switches by perforated cards 12 and i There is thus provided a fully automatic stop motion operative to stop the loom whenever the cards of either series are out of time by predetermined numbers of steps (one, two or three in the illustrative example) with the result that particular cutting repeats after every four cards in each set or every eight cards in the combined sets; and if the full set is not exactly divisible by eight, the maximum possible number of repeats is cut and the remainder of the cards are left uncut. The following will illustrate the operation of the loom with the cards so perforated.

When the cards are alternating in correct sequence, they will come into action as follows:

I235789101112etd The underscored numerals represent perforated cards, and it will be observed that a perforated card of one series is always followed by an unperforated card of the other series. In the result, as stated above, only one of the contact bars is in its circuit closing position at one time and accordingly the loom continues to run.

If now, for example, the odd card series should be one step out of time, card 5, say, will come up instead of card 3 and the two series will come into action as follows:

It will be. seen now that after a very few picks two of the perforated cards-follow one another, viz. i and 9, which means that bars [8 and 19 are both in engagement with their contacts at the same time; whereupon, as above explained, the loom is stopped.

If, again, the odd card series should be two, or three, steps out of time, the cards, will come into action as follows:

Two steps out 5 2 '7 4 Q etc. Three steps out '7 2 2 2 11 etc.

Again, in both instances, two perforated cards of and 2} follow one another, and, as before, the loom is brought to rest.

Similarly with the even cards, of which'but one illustration need be given. If this series weaving of any appreciable length of imperfect cloth is avoided and without reliance upon the weavers observation of the defect. As will be apparent, of course, the loom cannot be run, after the stop motion has functioned, until the cards have been restored to their proper relative positions.

The following is claimed:

1. In a double lift double cylinder Jacquard loom including alternately acting odd and even pattern cards, the combination of a circuit adapted to be energized to stop the loom, two switches arranged in series in said circuit and biased to open position, a hook subject to control by certain cards of the odd card series and a hook subject to control by certain cards of the even card series, and connections from said hooks to the switches to close the same in response to the lifting of said hooks, certain of the cards of each series having needle perforations therein to con trol the lifting of the respective hooks, said perforations being formed in such of the cards that when the cards are alternating in true sequence at least one unperforated card of one series follows each perforated card of the other series and that when the cards are alternating one, two or three steps out of time a perforated card of one series is followed by a perforated card of the other series.

2. In a double lift double cylinder Jacquard loom including alternately acting-odd and even pattern cards, the combination of a circuit adapted to be energized to stop the loom, two normally open switches arranged in series in said circuit, a hook subject to control by certain cards of the odd card series and a hook subject to control by certain cards of the even card series, and means for closing said switches in response to the lifting of said hooks, certain of the cards of each series having needle perforations therein to control the lifting of the respective hooks, said perforations being formed in such of the cards that when the cards are alternating in true sequence at least one unperforated card of one series follows each perforated card of the other series and that when the cards are alternating a predetermined number of steps out of time a perforated card of one series is followed by a perforated card of the other series.

3. In a double lift double'cylinder Jacquard loom including alternately acting odd and even pattern cards, the combination of a circuit adapted to be energized to stop the loom, two normally open switches arranged in series in said circuit, a hook subject to control by certain cards of the odd card series and a hook subject to control by certain cards of the even card series, and means for closing said switches in response to movement of said hooks, certain of the cards of both series having needle perforations therein to control the movement of said hooks, said perforations being formed in such of the cards that when the cards are alternating in true sequence at least one unperforated card of one series follows each perforated. card of the other series.

4. In a double lift double cylinder Jacquard loom including alternately acting odd and even pattern cards, the combination of two independently operable control members adapted to effect the stopping of the loom when simultaneously active, a hook subject to control by certain cards of the odd card series and a hook subject to control by certain cards of the even card series, and means for rendering said members active in response to movement of said hooks, certain of the cards of each series having needle perforations thereinto control the movement of the respective hooks, said perforations being formed in such of the cards that when the cards are alternating in true sequence at least one unperforated card of one series follows each perforated card of the other series.

5. In a double cylinder Jacquard loom including alternately acting odd and even pattern cards, the combinationof two independently operable members adapted to effect the, stopping of the loom when simultaneously active, one of said members being controlled by one series of cards and the other member by the other series of cards and means for rendering said members active simultaneously when the cards are alternating out of time.

KENNETH V. McCALEB.

Patent No. 2,561,1L

CERTIFICATE OF CORRECTION.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, first column, line 68, for 5 2 7 b. 9" read 5 2 7 L. 2; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of January, A. D. I 1915.

Leslie Frazer (Seal) Acting Comrrlissioner of Patents,

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