US1336677A

US1336677A - Safety stop-motion for jacquard looms

Info

Publication number: US1336677A
Application number: US123914A
Authority: US
Inventors: Cannon Louis Simpson
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-10-05
Filing date: 1916-10-05
Publication date: 1920-04-13
Anticipated expiration: 1937-04-13

Description

L. S. CANNON.

SAFETY STOP MOTION, FOR JACQUARD LOOMS.

' APPLICATION FILED 00L 5. m6.

1,336,677. Patented Apr. 13, 1920.

3/ 29 3/ 2 SHEETS-SHEET 1- 100/5 5. CANNOM L. S. CANNON.

SAFETY STOP MOTION. FOR JACQUARD LOOMS. APPLICATION FILED, 0e15, 1916.

, 1,336,677, Patented Apr. 13,1920.

2 SHEETSSHEET 2- Daub/ Lou/s CANNO/V,

LOUIS SIMPSON CANNON, OF ROSEMARY, NORTH CAROLINA.

SAFETY STOP-MOTION FOR JACQUARD LOOMS.

Specification of Letters Patent.

Patented Apr. 13, 1920.

Application filed October 5, 1916. Serial No. 123,914.

To all whom 2'25 may concern:

Be it known that I, LOUIS S. CANNON, a citizen of the United States, residing at Rosemary, in the county of Halifax and State of North Carolina, have invented certain new and useful Improvements in Safety Stop-Motions for Jacquard Looms, of which the following is a specification.

This invention relates to stop motion for looms and provides a device for. bringing a Jaquard loom to rest in case of any derangement of the pattern cards or card presenting mechanism.

. In a prior Patent No. 1,099,423, granted to myself and John M. Holladay on June 9, 1914, is disclosed a mechanism of this general type in which a normally operative stop mechanism is rendered inoperative at each pick by the alinement of a control needle or needles with corresponding holes in each. successive jacquard card. Where such alinement occurs the needle is, in trade parlance. said to be indicated? While said device operates satisfactorily there is considerable wear due to the retraction of the stop mechanism at every pick, and the purpose of the present invention is to eliminate this wear and still secure the characteristically certain action of the prior device.

Briefly stated, I make use of a normally. inert stop mechanism which is actuated by the jacquard whenever a control needle is forced back, but remains inert so long as the control needle or needles be correctly indicated by or alined with corresponding holes provided therefor in the successive cards. To accomplish this result I reverse the control hook or hooks, corresponding to the control needles, and provide auxiliary grifit' blades, upon which they are hooked by the forcing back of a needle. The control hooks are so connected to the stop mechanism as to actuate it when the control hooks are lifted by the grit? blades. This retains the important advantage present in the prior device of having the loom run so long as the control needles are correctly alined with or indicated by holes in each successive pattern car A successful embodiment of the invention is illustrated in the accompanying drawings, in which I Figure 1 is a front elevation of such portions of a single lift jacquard and a connected loom as are necessary to show the application of my invention thereto;

Fig. 2 is a side elevation of the same;

Fig. 3 is a plan view of the shipper-lever and associated mechanism;

Fig. 4 is a perspective view of a griif blade with an auxiliary grifi' blade attached. showing a reversed control hook and also regular hooks; and

Fig. 5 is a perspective view showing the stop mechanism and its relation to the shipper lever.

In the drawings I have purposely omitted in the interests of clearness practically all. parts of the jacquard and loom not directly related to the applied stop mechanism. Such jacquard or loom parts as are illustrated are typical and will serve to illustrate the principle of attachment of my invention to jacquards and looms varying in detail. In Fig. 1 the showing of the needles and hooks is purely diagrammatic.

A portion of the frame of the loom is illustrated at 11, and 12 represents the sword mounted on its rock shaft 18. The shipper lever 14 has a resilient portion 15 which urges it to the left (as viewed in Fig. 1). The upper end of the shipper lever 14 works in a slot 16 in the top plate 17 of frame 11 as seen in Figs. 3 and 5, and this stop 16 has an offset or notch 18 into which the shipper lever drops and by which it is held when it is swung to the right. When the shipper lever 14 is forced out of notch 18 it springs to the left. This movement to the left stops the loom by means of any usual connected mechanism suitable for the purpose. Such mechanisms are common in the art, and accordingly I illustrate merely the shipper lever as typical of this portion of the loom structure.

To force the lever 14 from notch 18 I make use of a lever mechanism which may be actuated by the sword. A bell crank having two

arms

19 and 20 is mounted in bearings 21 on frame 11. (See Figs. 1, 2, 3 and 5.) The arm 19 bears against lever 14 so as to force it out of the notch 18. The arm 20 carries hinged thereto a latch arm 22, which in its lowered position will be struck by :1 lug 23 on the sword 12 as the sword swings forward in the action of the loom. As will be observed from the drawings, the parts are so arranged that under these conditions the movement of the sword will through the action of the latch and bell-crank force the shipper lever 14; from the notch 18 thus causing the stopping of the loom by the characteristic action of the shipper lever.

The latch 22 is normally held up out of the path of lug 23 by means of a weight 24. This weight 24 is connected to the latch 22 by a cord 25- which passes upward. from the weight, around a guide 26 which may con veniently be located on the compart board 27, and then down to the latch 22. The simplest way of dropping the latch into the path of the lug 23 is to lift the weight Accordingly ,I connect the weight 24; by means of a number of leashes 28 to corresponding hooks 29, called control hooks, in the jacquard. Of coursea single leash and single control hook and needle will suiiice in. some instances but at least two control needles for each card are usually desirable and I illustrate the invention so applied.

The control hooks 29 are the same as the regular or pattern hooks 30 of the jacquard except that their upper or hooked ends are turned in the opposite direction so as to coact with small auxiliary griff blades 31 on the backs of the regular grid blades, 82. Thus when a control needle 33 is forced back by the action of the pattern card presenting mec-.anism, its corresponding hook 29 engages and is lifted by an auxiliary grid 81 and when a control needle is not forced back its corresponding hook iswholly disengaged from the griif mechanism. This is exactly the reverse of the action of the regular pattern needles and hooks, fora pattern hook 30 is cleared from its grill bar 32 only when its corresponding pattern needle 34 is forced back.

The needle guide board is shown at 35 and the cylinders are indicated at 36. A pattern card chain is shown at 37. The pins 38 are the ordinary guide pins for the cards. The needles are of course urged toward the cylinder by the usual springs (not shown). 7

For purposes of illustration I have shown the invention applied to a single lift jacquard having two pattern card chains running in unison on adjacent alined cylinders. It is applicable in similar manner to double 7 cylinder, auxiliary cylinder and other jacquards having one or more needle banks, one or more control needles being provided in each needle bank and all the cards of each of the various pattern series being punched to indicate such control needles.

In double lift j aequards the hooks are arranged'in pairs. Chosen pairs of hooks-may be used for control purposes both hooks of misplaced.

such pairs being reversed from their normal position to coaet with special griff blades, such as already described. 7

The invention is applied to existing jacquards by merely reversing the desired number of hooks and fastening to the backs of the proper grifi' bars small projecting plates to serve as auxiliary griff bars and coact with the reversed hooks. Similarly the throwout mechanism for the shipper lever is readily applicable to existing looms.

Since the loom will be immediately stop ped by the forcing back of 7 any control needle, the stop operates if the cards overrun or wind around the cylinder, if the cards become misplaced because of loose pegs or worn peg holes or if the cylinder gets out of alinement from any cause. In fact any derangement which can affect the accurate action of the pattern needles will actuate the stop.

The entire stop mechanism remains inert except when the loom is to be stopped, instead of moving every pick. Moreover, only one latch arm 22 is required instead of one for each control needle as in the Cannon and Holladay mechanism above referred to.

A clear distinction is to be drawn between the usual pattern hooks and-needles which raise and lower the warp threads in the loom to produce the shed, and control hooks and needles which as their name indicates, control the stop mechanism, and bring it into ction when a card of the pattern chain is Having thus described my invention, what I claim is 1. A. device for actuating the stop mechanism of a Jacquard loom comprising, in comblnittl011,1 griif; a control hook normally disengaged from said grill and connected with the stop'mechanism of a loom; and a control needle operable by the ordinary jacquard pattern cards for carrying said hook into engagement with said griff when said needle is forced back by a misplaced pattern card.

2. In combination with the stop mechanism of a loom, a device for actuating such stop mechanism from a jacquard, including a grid 5 a control hook normally disengaged from said griif and connected with the stop mechanism; and a control needle operable by the ordinary jacquard pattern cards for carrying said hook into engagement with said griif when said needle is forced back by a misplaced pattern card.

3. In combination with a loom having a stop device, a jacquard shedding mechanism including a griff having main and supplemental blades facing in reverse directions; pattern hooks normally overhanging the main blade of the grid; a control hook normally removed from the supplementalblade; needles controlling the pattern hooks; a control needle for the control hook; connections between the control hook and the stop device; and a series of pattern cards each perforated to indicate or aline with the pattern needles and the control needle when the cards are correctly positioned, but serving to move the control needle into engaging relation with the supplemental blade when any card is incorrectly positioned.

In combination with the grift of a Jacquard loom, a control hook normally disengaged from said grifl'; a control needle connected with said hook for moving it into engagement with said griff when said con trol needle is pressed back by a misplaced pattern card; a stop motion for the loom; connections between said control hook and stop motion for actuating the latter by the lifting of the former; and a pattern card series for said acquard, each card of which is provided with a hole to indicate said control needle.

5. In combination with the griif of a Jacquard loom, a control hook normally disengaged therefrom; a control needle con nected with said hook for moving the latter into engagement with said grit when said needle is pressed back; a stop motion for said loom; a yielding device normally hold ing said stop motion inactive; connections between said control hook and said yielding device whereby the rise of said hook will overpower said yielding device; and a pat tern card series each card of which is provided with a hole to indicate said control needle.

6. The combination of a loom; a jacquard operatively connected therewith and including the usual pattern hooks and associated needles, griff mechanism for said hooks, and pattern-card presenting mechanism; a special grifi a reversed control hook normally free from the griffs; a control needle connected with said control hook for moving the latter into engagement with said special grid when said needle is pressed back by a misplaced pattern card; a loom-stopping mechanism; connections between said control hook and stopping mechanism for actuating the latter by the lifting of the former; and a pattern card series presented by said card presenting mechanism and coacting with all said needles.

7. The combination of a loom; a jacquard operatively connected therewith and includ ing the usual pattern hooks and associated needles, grifl' mechanism for said hooks and pattern-card presenting mechanism; a special grifi? a reversed control hook normally free from the griffs; a control needle connected with said control hook for moving the latter into engagement with said special grifi when said needle is pressed back by a mis laced attern card a loom-sto )ing' means; a yielding device connected with said stopping means for holding the same in inactive position; connections between said control hook and yielding device for causing the lifting of the control hook to overpower the yielding device; and a pattern card series presented by said card presenting mechanism and coacting with all said needles.

In testimony whereof I have signed my name to this specification.

LOUIS SIMPSON CANNON.