US1343663A - Drop-box loom - Google Patents

Description

A. A.-DAVENPORT.

DROP BOX LOOM.

APPLICATION. FILED MAR.15| 1920.

Patented June 15, 1920.

A. A. DAVENPORT. DROP BOX LOOM. APPLICATION, man M.A.R.15, 1920.

Patented June 15, 1920.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

DROP-BOX LOOM.

Specification of Letters Patent.

Patented June 15, 1920.

Application filed March 15, 1920. Serial No. 365,897.

To all whom it may concern:

Be it known that I, ARTHUR A. DAVEN- PORT, a citizen of the United States, residing at Lookport, in the county of Niagara and State of New York, have invented a new and useful Improvement in Drop-Box Looms, of which the following is a specification.

This invention relates to looms or weaving machines, and more particularly to drop box looms having jacquard machines or other pattern making mechanism attached.

The objects of the invention. are to produce a machine of this kind in which the weft or filling may be omitted when desired to facilitate the work of hemstitching the woven material; also to provide a mechanism of this kind which can be operated by means of the pattern cards of a jacquard machine or other pattern making mechanism in such a manner that the filling or weft threads can be omitted without stopping the loom by means of the usual automatic stop motion; also to improve weaving mechanism of this kind in other respects hereinafter specified.

In weaving toweling or other material which is to be hemstitched, it is customary at the present time to loosely weave by means of a separate shuttle, one or more weft threads or fillings into the portions of the material which are to be hemstitched, and these threads must be cut and drawn before the material can be hemstitched, which involves a considerable amount of labor and expense. It is necessary with looms as heretofore made, to insert these loose weft threads into the parts to be hemstitched, since if the filling or weft thread were omitted the stop motion or filling detecting mechanism would stop the loom.

In the accompanying drawings:

Figure 1 is a longitudinal sectional view, partly diagrammatic, of a weft thread omitting mechanism embodying the invention.

Fig. 2 is a fragmentary top plan view thereof showing the fork with which the weft or filling cooperates to control the stop motion of the loom.

Fig. 3 is a fragmentary longitudinal sectional view thereof, showing the parts of the mechanism'in the positions which they occupy when the machine is operating to omit weft or filling.

Fig. 4 is a fragmentary perspective View thereof. a

Fig. 5 is a fragmentary View of a weft thread omitting mechanism of slightly modified construction.

The invention is shown in the accompanymg drawings as applied to a drop box loom having a jacquard machine attached, but it 1s not intended to limit the invention to use with this type of machines.

A represents the usual breast beam of a loom and B represents a filling or weft fork having the usual hooked portion or extension Z) and the forked end portion 6, with which the weft or filling is adapted to cooperate to hold the hooked extension I) out of engagement with an oscillatory lever G when the shuttles are provided with a thread, and to permit this extension to engage the lever C when the thread breaks or the weft is omitted, thereby actuating the usual stop motion (not shown) to stop the machine. The oscillatory lever G is pivoted at 0 and has an extension or arm a which engages a rotary cam 0 by means of which the arm 0, and lever C receive oscillatory motion. The operation of the loom is preferably con trolled by means of a jacquard mechanism which is diagrammatically shown in Fig. -1, and in which D represents the cylinder, D the needle board and a? the pattern cards. E E represent needles which are connected with the usual hooks e e and are adapted to move the hooks into operative relations to knives 6 when the needles pass through holes in the pattern cards. All of these parts have heretofore been used on looms and of themselves form no part of this invention.

In order to enable the loom to operate for an interval of time without a weft or filling, and thus produce a part in the fabric which can be hemstitched without necessitating the removing of weft threads, means are provided for rendering'stop motion inoperative while this part of the fabric is being formed. This can be accomplished by preventing the extension 6 of the fork B from engaging the lever C when the filling or weft is omitted. In the construction shown in Figs. 1-4, this is accomplished in the following manner:

A lever F is pivoted at f on the breast beam Av or other fixed part of the loom and an arm or standard f extends upwardly from this lever and into operative relation to the extension I) of the fork. In the construction shown, the upper end of the standard is. provided with a head or enlarged portion f adapted to cooperate with an enlargement or projection on the extension 6 of the fork, so that when the outer end of the lever F is swung upwardly, the extension I) of the fork will be held in a position in which the lever C cannot engage therewith. When the fork is held in this position, an

empty shuttle can be used, thus omitting the weft or filling from the fabric. 7 represents a guide r d, secured at one end to the breast beam A and having an-eye in the other end thereof through'w-hich the standard f extends.

In order to actuate the lever F automatically from the jacquard mechanism, one of the hooks of this mechanism, for example the hook e, is connected by means ofa cord or wire 9 to a'be'l-l crank-or box raising lever G, one arm gof which is connected by means of a cord or wireg with'the usual box raising'motion (not shown), to cause empty shuttle to housed in theloom. The other arm 9 of the bell' crank lever G is connected bymeans of a wire-or cord to the end of the fork actuating lever F. In this manner the same mechanism which actuates the box raising motion also prevents the actuation of the-stop motion. The bell crank lever G is held in its operative position as shown in Fig. 3 by means of a detent lever H, which has an arm h adapted to engage a projection or shoulder'h on the lever G, when this lever is inoperative position. The other arm of the lever H is connected by a wire or cord k to the other hook 6, so that when the hook e is raised by the knife, the detent lever will be swung out of engagement with the projection it, thus releasing the bell crank lever Gr. Bothof the hooks e e are controlled in the usual manner by the pattern cards of the jacquard mechanism so that the interval during which an empty shuttle is used and the stop motion is rendered inoperative, is controlled by means of the pattern cards. If it is desired, the empty shuttle may be omitted and an empty shuttle box thus brought into operative relation to the lay level of the loom. hen this is done it is necessary to tie or otherwise hold the swell or binder of the shuttle box in the ,same position which it occupies when a shuttle is in place therein, so that the usual stop motion of the loo-m will not be actuated by the position of the swell or binderof the empty shuttle box.

In the modifiedconstruction shown in Fig. 5, the arm 9 of the bell crank lever Gr is connected by means of a cord or wire I to the arm 6', which is connected tothe lever .6. Consequently, when "the bell crank lever G is actuated, the end of the arm 0 is raised, thus holding this arm out of engagement with the cam 0 and thereby preventing the actuation of the stop motion.

The mechanism described can be very easily applied to looms and adds very little to the cost of the same. The mechanism cfl'ects a great saving in labor when the loom is used for weaving fabric to be hemstitched, since the removing of weft threads has heretofore been done by hand. A considerable amount of yarn is also saved by omitting the weft threads 'in the parts of the fabric to be hemstitched.

The mechanismdoes not in any way interfere with the operation of the stop motion of the loom when the loom is used inthe usual manner, but merely renders the stop motion inoperative while the portion of the fabric which is to behemstitched is being formed.

1 claim as my invention: r

l. a weaving machine, the combination with weft-detecting means for'stopp-ing the machine when the weft is omitted-of means for rendering said weft-detecting means inoperative to permit a portion of the workto be. formed without weft threads.

2- In a weaving machine, the combination with weftdeteeting means for stopping the machine when :the weft is omitted, of means operated by a pattern making mechanism to actuate "a box motion, means connectedwi-t h said box motion actuating means to render said weft-detecting means inoperative to permit a portion of the work to be formed without weft threads.

3. In a drop box loom, the combination with weft-detecting means for stopping the loom when the weft is omitted, and means foractuating a box motion, of a connection between said actuating means and-said means for stopping said loom'to render said stopping means inoperative to permit -a portion of the work to be formed without weft threads.

4:. In a drop box loom, the combination of -a pattern making mechanism, a box raising "lever operated by said pattern making mechanism, a stop device for said loom, and means connected with-said lever to render said stop device inoperative to permit a portion ofthe work to be formed without weft threads.

5. In a drop box loom, the combination of'a pattern making mechanism, a box raising lever operated by said pattern making mechanism, and a stop device for said loom including a weft detector fork and an actuating lever, and means operablewhen it'is desired to omit weft threads from the work which prevents said fork and actua'ting lever fromactuating said stop device. y

"6. In a drop box loom, the combination "of a box raising lever, a stop device for said eaaeee a box; raising lever, a stop device for said. loom including a vveft detector fork and an actuating lever, and means operated by said box raising lever for preventing said actuating lever and said fork from engaging to actuate said stop device.

8. In a drop box loom, the combination of a box raising lever, a stop device for said loom including a Weft detector fork and an actuating lever, and a device operated by said box raising lever for preventing said fork from being engaged by said actuating lever to stop the operation of the loom.

9. In a drop box loom, the combination of a box raising lever, a stop device for said loom including a Weft detector fork and an actuating lever, and a member connected with said box raising lever and adapted to move said fork into a position in which it cannot be engaged by said actuating lever to stop the loom, when said box raising lever is actuated.

10. In a drop box loom, the combination of a box raising lever, a stop device for said loom including a Weft detector fork and an actuating lever, and a connection between said box raising lever and said actuating lever for holding said actuating lever in a position in which itcannot engage said fork to stop the operation of the 100111.

Witness my hand this 5th March, 1920.

ARTHUR A. DAVENPORT. lVitnesses:

J AMES MEIKLEJOHN, GEORGE MONT.

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