US737536A - Shuttle-changing mechanism for looms. - Google Patents

Description

No. 787,536. PATENTED AUG. 25, 1903 A.'E., A. & G. WALKER. SHUTTLE CHANGING MECHANISM FOR LOOMS.

APPLICATION FILED NOV.11, 1902.

N0 MODEL.

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No. "reuse UNTTED STATES Iatented August 25, 1903.

PATENT OFFICE.

OF NORYVOOD GREEN, NEAR HALIFAX, ENGLAND.

SHUTTLE-CHANGING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 737,536, dated August 25, 1903.

Original application filed March 21, 1902, fierial No. 99,372. Divided and this application filed November 11, 1902. Serial No. 180,910. (No model.)

To all whom it may concern.-

Be it known that we, ALBERT EDWARD WALKER, ARTHUR WALKER, and GEORGE W'ALKER, all subjects of His Majesty the King of Great Britain, residing at Norwood Green, near Halifax, England, have invented a certain new and useful Improvement in Shuttle- Changing Mechanism for Looms, of which the following is a specification.

This invention relates to improvements in that class of weaving-looms in which the shuttle-chan ging mechanism is putinto operation by plates and chains, lags, or their equiva lent mounted upon and actuated by an intermittently-operated card cylinder or barrel; and its object is to provide simple means for giving the operative control, whereby he can put the cylinder into operation at will or when the shuttle requires changing. For this purpose we provide two ratchet-wheels on the cylinder and provide two pawls or hooks to engage these ratchet-wheels. The pawls are pivoted to an arm or lever which is vibrated in the ordinary way by a cam and lifting-rod. One pawl is normally prevented from engaging its ratchet-wheel by a removable stoppiece, and the other ratchet-wheel has a blank space in it--that is to say, one tooth is omitted. Consequently each time the pawl meets this space in the ratchet-wheel the cylinder remains stationary until the said stop-piece is moved sufficiently to allow the other pawl to engage its ratchet-wheel and operate the cylinder. The plates or lags are so arranged that the first movement of the cylinder after it has been stationary brings into active position the particular plate or lag provided to put the shuttle-changing mechanism into operation. The said stop-piece may consist of a rod normally held by a spring in such a position that it engages the pawl or an arm thereon, thereby holding the pawl away from the ratchetwheel and preventing it engaging the teeth. A cord or its equivalent is attached to the rod and is carried around to the front of the loom, so as to be within convenient reach of the attendant, who simply pulls the cord to move the stop-piece out of action when the shuttle requires changing.

To fully describe our invention, reference is made to the accompanying sheet of drawings, forming a part of this specification, in which similar reference-numerals indicate corresponding parts in each of the views.

Figure 1 is a side elevation of such parts of a loom-frame and attachments thereto as are necessary to illustrate the application of our invention. Fig. 2 is a plan of same. Fig. 3 is a view of the ratchet-wheel, in which one tooth is omitted.

Upon the cardcylinder we affix two ratchet wheels 100 and 102. The ratchetwheel100, which may be termed the drivingratchet, is operated by the pawl 103, and the ratchet-wheel 102, which may be termed the starting-ratchet, is operated by the pawl 1 01. Both pawls are pivoted on the stud 7 0 fixed in the lever 70, which works on the fulcrum-rod 71. The lever rises and falls bymeans of the usual lifting-rod 60 and cam 00, fixed upon the shaft 7 5. The employment of two ratchetwheels is for the purpose of allowing the cylinder 60 to make only one rotation after each actuation of the cord 110, which controls the mechanism. This object is attained by omitting one tooth at the point from the driving-ratchet 100, Fig. 3, and by keeping the pawl 101 normally out of action with the startingratchet 102. The pawl 101 is kept out of action with its ratchet 102 by the finger 108 on the said pawl being engaged by the projection 105 at the end of the sliding rod 106, which rod is mounted in the slide- bearings 107 and 107, fixed in the lever 70. The sliding rod 106 is pressed toward and bears upon the finger 108 on the pawl 101 by the spiral spring 109 on the rod, the spring being compressed between the collar 100 and the bearing 107. The stud 70 on the lever 70 limits the move ment of the rod 106 when submitted to the action of the spring 109 and defines the extent of movement of the projection 105 over the finger 108.

To the rear end of the sliding rod 100 a cord 110 is attached, which is suitably guided around to the front of the loom. When the cord 110 is pulled, the sliding rod 106 is drawn backward and the pressure of the projection 105 upon the finger 108 of the pawl 101 is removed and the pawl 101 thereby allowed by its weight to fall-upon the starting-ratchet 102. Then immediately upon the rising of the cam 60 the cylinder 60 is put into action and turned over the space 100, where the tooth is omitted in the ratchet-wheel 100. The rotation of the cylinder 60 is then taken up by the driving-ratchet 100 and continued by it until the space of the missing tooth again arrives under the pawl 103, when the cylinder comes to rest, the said pawl at each rise of the cam 60 passing ineffectively over the space 01": the missing tooth, the pawl 101 having been previously withdrawn from contact with the starting-ratchet 102 when the tension upon the cord was released. The cord 110 may be pulled by the operative when it is desired to rotate the card-cylinder for the purpose of producing at long distances stripes of diiferent colors across the fabric. It may also be pulled by the attendant when it is necessary on the near exhaustion of Weft to rotate the card-cylinder for the purpose of bringing into operation automatic shuttle changing and feeding mechanism. For the same purpose the cord may be attached to the weft-fork arm and drawn back by it when the weft-fork is actuated upon the breaking or failing of the weft-thread.

The lags or cards 60, into the perforations in which the pins 61 and 70 on the levers 61 and 70, respectively, fall, can of course be arranged to cause the shuttle-changing or, as the case may be, the shuttle changing and feeding levers 61 and 70 to operate at any desired intervals during the period of the r0- tation of the card-cylinder (30.

hat we claim is 1. In a loom, the combination with the cardcylinder of two ratchet-wheels, one of which has a blank space, a pawl normally actuating said ratchetwvheel except when it meets such space, a second pawl and means for bringing it into action upon the second ratchet-wheel in order to restart the cylinder.

2. In a loom the combination with an operating-lever, a pawl pivoted to said lever and a ratchet-wheel, of a finger on said pawl a slid-- ing rod engagingsaid finger and holding said pawl out of engagement with said ratchet and means under the control of the operator for releasing said finger and causing the pawl to be brought into engagement with its ratchet, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

ALBERT EDWARD WVALKER. ARTHUR WVALKER. GEORGE WALKER. Witnesses HERBERT J. J EFFERY, WILLIAM SoRUroN.

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