US1524103A - Shuttle-box tension-controlling mechanism for looms - Google Patents

Description

Jan. 27. 1925-. r 1,524,103

; J. NORTHROP I SHUTTLE BOX 'rnnsxou couwnomgus MECHANISM FOR LOOMS Filed Oct. 10 1922 Patented .len. 27, 1%255.

JONAS NOR'IHROP. OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO HOPEDALE MANU- FACTURING COMPANY, OF MILFORD. MASSACHUSETTS,

CHUSETTS.

A CORPORATION OF MASSA- i SHUTTLE-BOX TENSION-CONTROLLING MECHANISM FOR LOOIVIS.

Application filed Cc'tober 10, 1922. Serial No. 593,553.

130 it known that i, Jonas Nonrnnor, a citizen of the United States, residing at llopcdalc. in the county of orcester and State oi Massachusetts, have invented certain new and useful Improvements in Shuttle-l ox 'llension-(ontrolling Mechanism for Looms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present inventi m relates to an improvement in shuttle box tension controlling mechanism for looms.

The object of the inventitm is to produce a construction for varying the resistance ottercd by the shuttle box to the entrance of the shuttle with the position of the lay. To this end the invention consists in the mechanism hereinafter described and particularly defined in the claims.

in the accompanying drawings illustrating the preferred form of the invent on, Fig. 1 is a sectional elevation of the lay. breast beam and associated parts of a loom illustrating the construction; and Fig. 2 is a perspective view of a number of the parts together constituting a spring bracket, its supporting and securing means.

The illustrated embodiment oi' the invention is described as follows: The loom frame 1. the lay 2, the sword l, and the other oooperating parts of a loom, may be oonstrut-ted in any usual or preferred,form. The lay is provided on its under side with the dagger shalt t to which are secured the bindcr tingers 5. each carrying a binder presser G adjustably secured to the binder lingers. 'lhe dagger shaft 1 is provided with daggers 7 adapted to engage the frog in the usual manner. and it is also provided with a spring arm 8 which is rigidly secured to the. dagger shaft. 4. The forward end of the spring arm 8 is provlded with a hook 9 to which one end of the. dagger shaft spring '10. is secured. The other end of the spring is hooked onto the spring hook on the bracket 11 which is seemed to the frame of the loom and adapted to be adjusted. to various positions in order to vary the amount oi tension to which the spring is :tcd, and in turn the amount of the tension on the binders, and therefore the tension on the shuttle as it enters the shuttle box. The bracket 11 slotted at 12 to receive the-bolt 13. The bracket 11 is received in a slot 1t in the washer 15, provided on its under surface with a series of radial grooves 16. This washer 15 is supported against a second washer li' which has two teeth 19 adapted to enter the radial grooves 16 in the under surface of the washer 15. The washer 17 is provided with a. square hole 20. The bracket 11 is bolted to an ear 21 formed on the frame of the 100m, which car is provided witha slot 22 adapted'to receive the squared portion of the bolt 13. The car 21 thereby holds the bolt 13 from rotating movement and the bolt holds the washer 17 from similar movement. The projections on the latter hold the washer 15 from rotating movement. On the'end of the bolt is received the washer 23 and nut 24. The bracket 11 may be moved to any desired position with' h the limits of the slot 12 and to any angular position by loosening the nut 24: on the bolt 13, and

turning the bracket 11 so as to turn the washer 16 to the desired position. The

bracket may be secured in a wide variety of positions of adjustment with relation to the lay so as thereby to vary the amount of force exerted by the spring on the spring arms 8 and the rate at which such pressure shall be varied. Thus with the spring hook of the bracket 11 in a rearward position, the time of application o the spring pressure to the spring arms on the dagger shaft will be later than otherwise. 1

The mode of operation of the mechanism is as follows: Starting with the lay in the position shown in dotted lines in Fig. 1. the binders, through the means described, exert a minimum pressure on the shuttle. This pressure is increased as the. lay beats back to the back center where. it reaches a maximum, and it then decreases as the lay beats forward again. By positioning the bracket in various ways it will be observed that a number of ditterent results may be se cured with respect to the friction exerted on the shuttle by the binders. For example.

the tension on the shuttle may be made to decrease fronrthe front center as the lay moves rearwardly for a certain distance. thereby ati'ordmg a reduction of friction on the shuttletor picking purposes. The pres.

arm secured to the dag sure may then increase to the back center,

affording a maximum pressure at that point which. is practically the earliest point at which the shuttle may reach the shuttle box into which it is being thrown, and from such point the pressure on the shuttle may dcc'rease as the lay moves forward, so that a tardily arriving shuttle. may be subiected to a lesser resistance in the receiving shuttle box. Many other arrangements and variations of the friction resistance of the shuttle may be secured by this construction.

The present invention is not broadly claimed herein, as itforms the subject of the application of Clare H. Draper filed July 11, 1922, Serial No. 574,212, to which, by permission, reference may be had.

Having thus described the invention, what is claimed is:

1. Shuttle box tension controlling mechanism for looms having, in combination, a lay, shuttle boxes provided with binders, binder fingers for acting on the binders, a dagger shaft carrying the binder fingers, a spring 'ger shaft, and a spring attached at one end to the end of the spring arm and at the other end to a sta-" tionary part of the loom.

Shuttle box tension controlling inechanism for looms having, in combination, a lay, shuttle boxes carried by the lay provided with binders, a spring arm, conucctions between the spring arm and the binders for causing pressure to be exerted on the binders, a spring connected with a spring arm and to a statitmary part of the loom for causing, spring pressure to be exerted on the binder, the point oi attachment of the spring to the stationary partoii the loom being located at a distance from the 1 axis of motion of the lay, so that variable pressures will be exerted by the spring on the binder during the operation of the loom in accordance with the time of reception of the shuttle in a box,

Shuttle box tension controlliing mechanism for looms having, in combimition, a lay, a shuttle box carried by the lay, a friction cmitrivunce for increasing and decreasing the resistance of the shuttle box to the entrance of the shuttle thereto, and means for applying such frictional pressure to the shuttle having provision for adjustment so as to reduce the pressure on the shuttle during the picking, to increase it to a maximum at a time when the shuttle may first arrive at the shuttle box into which it is thrown, and to thereafter decrease it so that the shuttle may be received in the shuttle box with less and less resistance after the lay passes the back center.

JONAS NORTHROP.

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