US668329A - Carrier for braiding-machines. - Google Patents

Description

' Patented Feb. I9, l90l. J. A. GRIMES & F. M. BENEDICT.

CARRIER FOR BRAIDING MACHINES. Application filed Nov. 10, 1900.) (No Model.) v

R MTNESEEE. //WE/V7'0/?5 V r m% 1 NITE STATES Arniwr JOSEPH A. GRIMES, OF CENTRAL FALLS, AND FRANK M. BENEDIOT, OF PAWTUCKET, RHODE ISLAND.

CARRIER FOR BRAlDlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 668,329, dated February 19, 1901. Application filed November 10, 1900. Serial No. 36,140. (No model.)

To aaZZ whom it may concern:

Be it known that we, JOSEPH A. Games, a resident of Central Falls, and FRANK M. BENEDICT, a resident of Pawtucket, in the State of Rhode Island, citizens of the United States of America, have invented certain new and useful Improvements in Carriers for Braiding-Machines, of which the following is a specification.

Our invention relates to improvements in carriers for braiding-machines in which the rotation of the bobbin is regulated by what is commonly known as a top weight provided with a dog or pawl which engages notches in the upper head of the bobbin; and the purpose of our invention is to provide a carrier for braiding-machines in which the action of the top Weight in regulating the revolution of the bobbin will be more prompt and effective than by the devices now in use. We accomplish this purpose by the mechanism shown in the accompanying drawings, in which Figure l is a vertical side view of the car rier with its bobbin and the top and bottom weights, the top weight being in actual engagement with the notches in the upper head of the bobbin. Fig. 2 is a similar side view of the carrier, showing the top weight raised out of engagement with the notched bobbinhead.

The same parts are designated by the same letters throughout both views.

In Fig. l, A is the bobbin, shown in position upon the carrier, tbeing the thread, I) the top weight, b the pawl or dog, engaging the notches in the head of the bobbin, 0 what is commonly known as the bottom weight, and d the vertical arm, on which the top and bottom weights 1) and c slide.

The top of the dog I) is provided with notches b and a thin spring a, adapted to fit closely into any one of these notches, according to the tension required, the other end of a engaging the projection 61 at the top of the member d of the carrier.

In carriers of the type referred to the weights 1) and c serve together as a tensionregulator. When more thread is demanded by the draft of the braid, the bottom weight 0 is lifted until it comes in contact with the top weight b, and the pull on the thread continuing the top weight b is lifted, thus releasing the pawl 19 and permitting the bobbin A to revolve. Where the operation of the machine is very rapid as the carrier in its revolution goes in and out, the pull upon the thread comes not steadily, but by a jerking motion in allthe carriers now in use. As a result the bottom weight 0 is frequently thrown with considerable violence against the top weight b, liftingit quite a distance above the bobbin-head. 1), having its momentum to overcome and actuated only by its own weight, does not instantly return, and as a result the bobbin A, instead of revolving through only a portion of a revolution, frequently makes an entire revolution suddenly, thus leaving a large amount of slack thread which enables the bottom weight 0 to drop the entire distance to the bottom of the slide d, thus automatically stopping the machine,

machines of the type in question automatically to stop the machine when the thread breaks and the weight 0 is released. Various methods have been adopted to prevent the too-free revolution of the bobbin under conditions such as those described, but without much practical success. So far as we are aware no means have been employed for securing the rapid return of the top weight Z) other than by its own weight.

Our invention consists of the spring a, above referred to, fastened at one end to the pawl b and at the other end to the member (Z just below its upper extremity d. As shown in Fig. 2, when a sudden jerk of the thread lifts the bottom weight 0, thus also lifting the top weight Z), the spring a is compressed for an instant, but by its elasticity it instantly depresses the top weight h before the spool A has an opportunity to make more than that portion of a revolution represented by a single notch in the head, thus prevent- .ing undue slackness of the thread, and thus preventing the unintentional stopping of the machine.

The tension of the spring Ct, as will be seen, may be regulated by the various notches b. By means of this spring a very much more regular tension is given to the thread and inasmuch as the bottom weight 0 operatesin In a carrier for braiding-machines of the type shown, the combination of a top weight carrying a pawl adapted to engage the bobbin-head, said pawl having a plurality of notches in the upper edge thereof; and a spring a fixed at its lower end in said pawl by means of said notches, and held in place at its upper end by the projecting lug d of the member (1, and operating to quickly de- 20 press the top weight when the same is raised, substantially as described.

Signed at Pawtucket, Rhode Island, this 6th day of November, 1900.

JOSEPH A. GRIMES. FRANK M. BENEDICT.

Witnesses:

JAMES L. J ENKS, FLORENCE E. BATES.

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