US533710A - Pick-measuring device for looms - Google Patents

Description

(No Model.)

J. LANG-ASTER. PICK MEASURING DEVICE FOR LOMS.

1\0,533 ,710` Patented Feb. 5, 1895.

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Ehrung PATENT JOHN LANCASTER, OF DOVER, NEW HAMPSHIRE.

PICK-MEASURING DEVICE FDR LOOMS.

SPECIFIGATIGN forming part of Letters Patent No. 533,710, dated February 5, 1895.

Application iledJ'une 6, 1893. Serial No.4'76i'717. (No model.)

To zZ-Z whom t 71mg concern:

Be it 'known that I, JOHN LANCASTER, of Dover, in the county of Stratford and State of New Hampshire, have invented certain new and useful improvements in Pick-Measuring Devices for Looms, of which the following is a specification.

The object of this invention is to provide improved means for indicating upon a glance at a piece of cloth, Whether in the loom and in the process of Weaving, or after it leaves the Weavers hands, and when undergoing inspection in the course of finishing and delivery, as to the number of picks contained in Vthe cloth in a given length.

To this end the invention consists in the combination of a worm-Wheel operatively connected with the crank-shaft of the loom or any other shaft which has a known number of revolutions or extent of movement with respect to each pick, said Wheel having a depression in its face, a lever horizontally disposed and extending substantially at right angles to the face of said Wheel and so ar ranged that its shorter arm bears against said face and is adapted to enter the depression therein, and a Wire attached to the longer arm of the lever and extending up to any convenient or suitable place in front of the harness, the said Wire being provided with a mail or eye through which passes a thread contrasting in color or otherwise with the thread or yarn woven into the goods, the arrangement and construction being such that the colored thread floats upon one side of the piece during the engagement of the lever with the :face of the worm-Wheel and hence, during a certain number of picks, and then upon said lever dropping by reason of its shorter arm heing received in the depression of the Worm- Wheel, said colored thread is caused to be Woven into the goods for one or more picks according to the period of engagement of the lever in the depression, and then the said thread again floats for the same number of picks as before. By this means the proper attendant can by simply placing a measuring device upon the goods ascertain at once the number ot' shots of weft contained therein in a given length.

Reference is to be -had to the annexed draw ings and tothe letters marked thereon form ing a part of this specification, the same letters designating the same parts or features as the case may be, Wherever they occur.

Of the drawings-Figure l isa sectional side view of the invention and so much of a loom as itis necessary to show in order to give a clear view of the construction and mode of operation of the improvement. Fig. 2 is a front view of the same.

In the present illustration and description of the invention it has been chosen to show and explain but one form and arrangement thereof which experience has shown to be pro4 ductive of satisfactory results, but it is desired that it should be understood from the outset that the form and position or arrange ment of parts may be varied Within the skill of a mechanic Without departing from the nature or spirit of the invention. For example, the crank shaft will be chosen as the prime operator of the invention, and other parts will be explained as having a particular arrangement with respect thereto, but it will appear obvious that the bottom shaft or other shaft or part having a particular degree of movement with respect to the picking motion may be selected as the prime operator, and the parts may be variously arranged with reference thereto and to each other.

In the drawingsa designates the crank shaft by which the lay is operated and b designates the center bearing of the said shaft.

c designates a Worm on the crank shaft d which meshes with and operates a Worm Wheel CZ arranged to turn in suitable bearings connected with a bracket e supported from the center bearing b or other stationary part of the loom frame. The Worm Wheel d is by preference vertically arranged beneath the crank shaft a.

f designates a lever fulcrumed, as at g, at a suitable point and upon a suitable part of the loom, and provided at the end of its longer arm,as herein shown, With a Wire h Whichextends up in front of the harness, (not shown) and through a suitable guide Il on the top of the loom frame* The said Wire is provided at the shed point with a mail or eye j through which passes a thread contrasting in color or other visual character with the threads or yarns being Woven into the goods, and which thread extends in the direction of the vrarpsu IOO The opposite end of the leverf bears against the face of the worm `wheel d, which, ata suit able point in the path of the end of the lever, is provided with a slot or depression 7a, into which the end of the lever in, contact With the Worm Wheel may fall at each revolution of the said Wheel, drawing the wire h and thread carried thereby down during one or more picking operations, depending on the length or extent of the slot or depression ,le the Wire h being raised by the shorter arm of the lever f riding out of the depression 7c formed in the face of the Worm Wheel d upon the extreme outer face, and so raising the longer arm of said lever against the gravity thereof, and subsequently the Wire. The continued revolution of the Wheel causes the end of the slot to act against the lever and move it so as to elevate the Wire, which so remains until the ,slot comes round again.

The construction and arrangementof parts, as herein shown, are such that the Worm Wheel d will be moved to the extent of one of its teeth at each revolution of the crankshaft d, and While the end of the lever fadjacent to the worm wheel rides on the face of said Wheel, the colored thread controlled by the wire h will float on one side of the goods being woven, and when said end of the said lever drops into the slot or depression the colored thread will be drawn down and Woven into the cloth for two picks and show on the hack of the goods.

Calculating, now, that the Worm wheel has sixty teeth, and that each tooth represents a pick the colored thread will iioat on the face of the cloth for titty-eight picks, and on the back for two picks. With this arrangement,

in order to ascertain whether the required number of picks are in the cloth the Overseer may multiply the number of teeth in the gear by any number that will give a piek-measure about four inches long, and divide by the number of picks Wanted which Will give the length of pick-measure Wanted by the Weaver.

Say, for example, that the number sixty which is the number of teeth in the Worm Wheel is multiplied by ve, giving a result of three hundred, and that eighty is the number of picks desired in the measure. Dividing three hundred by eighty gives a result of 3.75 or three and three-fourths inches as the length of measure embracing eighty picks per inch three and three-quarters inches long. The measure so obtained can be laid upon the goods along the line Where the colored thread is Woven in, so that the attendant can teli at a glance whether the requirements as to picks per inch are being met by the Weaver.

Having thus explained the nature of the invention and described a Way of constructing and using the same, though Without attempting to set forth all of the forms in which it may be made or all of the modes of its use.r it is declared that what is claimed is* 1n combination, a drivinglshaft carrying a Worm; a worm-wheel arranged in a vertical plane below the Worm and meshing therewith, said Wheel having an opening or depression in one side; a horizontally disposed pivoted lever having a short arm arranged to bear against the side of said wheel and enter said depression, the long arm of said lever arranged to overbalance the short arm and keep it in engagement with said wheel; and a Wire attached atv one end to the long arm of said lever and extending vertically through a guide in the frame, said wire having a mail or eye for carrying the marking-thread; substantially as and for the purpose described.

In testimony whereof I have signed my name to this specication, in the presence ot two subscribing witnesses, this 31st day of May, A. D. 1893.

JOHN LANCASTER.

Nituessesz THoMAs BLACKBURN, XVILLIAM JnNKINsoN.

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