US1620641A - Let-off device - Google Patents

Description

March 15 1927. 1,620,641

T. J. GARISIO LET-OFF DEVICE Filed April 14, 1926 Patented Mar. 15, 1927.

UNITED srares PATENT DEF-FIC TH'ECDOBE 3'. 'QA-RISIC; OF ALIZIZEIN'IlCWVN,` PENNSYLVANIA.

LET--0FE DEVICE.

Apprenti@ inea kApril 14, 192s. semi No. 101.9716.

nism lfor producing aggoting. These frames.

cannot readily .be mounted. onisome of the wide goods. silk looms now in use to make v centre selvages for the reason that there is not sufIic-ient room between the rear rails ot' the loom fr ,ameand the harness, and in `order to enable the device to be properly .mounted on such looms itV became necessary to use a different or modified construction.`

To this end the frame carrying the let-off mechanism shall be adjustable across the loom as well as from front to rear, and also, it' desired, vertically, in accordance with the disposition of the harness. The two selvage threads shall always leave a let-off frame at nearly the same point.

Referring to the drawings, in which like parts are similarly designated- Figure l is a perspective view showing a device embodying my invention attached between the horizontal rails of the rear of a loom frame.

Fig. 2 is a rear elevation of the device.

In the present construction I have a frame much wider at the top than at the bottom and symmetrical with respect to a vertical central line or axis. In this frame near the top and outer edges I place two pins 34 carrying` the spools 35 for the respective centre selvage forming threads and g/ which leave the frame near the middle of the wider top edge. passes from its spool to a pigtail guide 42 screwed into the wooden frame 30, and thence downward to a pig-tail 29 screwed into a vertically slidable wooden weight 27 which is provided with a vertical groove. A vertical staple-like wire 28 whose bent ends are driven into the frame 30 is in the groove and guides the weight 27. Each thread passes from a pig-tail 29 to a pigtail 43 close to the middle of the frame 30 at its top.

Each spool has a pin 37 that strikes a Each thread stop 40 on a pivoted hook 4l whose endlies under the .guide 28.

The mechani.Smsyare substantially duplicates; and `substantially as shown in my patent .above referred to, the arrangement being such that the .two threads ,or and 11/ lleave the device from pig-tails Ll2 close together,l

and that both mechanisms are on the same tace otframe30.

Now, in .order to properly position this frame` for the doups, lI mount. .between the upper and lower .cross rails ot the rear ot the loom trame, a vertical bar A having end` flanges B through which pass bolts C securing the bar between the rear trarnerails 50 of the loo-m frame, which rails .are

bored at the proper; place for mounting this ba-r.

The bar A. has. one `or Amore holes D through which may pass a clamping bolt I4" for a bracket G ot fiat iron bent at a right angle. One arm of this bracket has one or more perforations H through any of which the bolt may be passed. The other arm oithe bracket Gr lies in a transverse groove K in the back of the frame 30, which groove is of slightl less depth than the thickness of the arm t at lies in it.

On the back of the frame extending across the bracket arm and groove is a plate L secured by bolts M passing through the frame 30 and plate L and having nuts N thereon. Washers O on the front of the frame and through which the bolts pass prevent the bolt heads from injuring the wooden frame when the nuts are tightened.

By this means the frame 30 can beadjusted to any extent longitudinally of the rails, the plate L clamping the frame arm tightly to the bracket arm, this adjustment being eat or small within the limits of the length of the bracket arm that is parallel to the loom frame rails 50 in the directions indicated by the arrow a Figure l. The holes H in the other arm of the bracket permit adjustment of the Iframe 30 to the front or rear of: the loom, as indicated by the arrow o. Consequently I can adjust the frame 30 in three rectangular directions or any one of them.

The particular construction of the let-oit' mechanism is such that the final guides on the frame 30, for the selvage threads going to the doups, namely, pigtails 43, are close together', so that these threads can pass the doups at the same location with respect to the harness of the loom.

My invention enables the use of let-off mechanism with certain types of looms with which it was either impossible or diliicult to use them, decreases materially the breakage of the selvage threads m and y, facilitates superintendence by the operator, and lessens the work of the loom xer, in case the threads break and necessitate re-threading.

I claiml. A let-oft' for intermediate selvage devices comprising a frame carrying a pair of take-up devices and final thread guides adjacent one another, andy means to bodily adjust the lframe in three rectangular directions.

2. A let-olf for intermediate selvage devices, comprising a frame carrying a pair of take-up devices and final thread guides closely arranged to one another, and means to adjust the frame in two rectangular directions. t

3. A let-off for intermediate selvage devices comprising a frame having a pair of rotatable spools thereon spaced apart, a gravity take-up for each spool and arranged between them, means operated by the takeup to release the spools and a final thread guide for the thread of each spool, said guides arranged close to one another between the take-ups.

4L. A let-off for centre selvage devices, comprising a frame having a transverse groove, a bracket having two arms at right angles to one another, one of said arms arranged in said groove, a clamp on said frame to clamp said arm in the groove and permit adjustment therealong, and means on the other arm to permit the bracket yto be adjusted longitudinally of the loom.

5. A let-off for centre selvage devices, comprising a vertical bar at the rear of the loom having bolt-holes therealong, a bracket having two arms at right angles to each other, one of which arms has bolt-holes therealong, a bolt for .securing said arm to said bar, in combination with a frame having a transverse groove in which the other arm of said bracket lies, a plate on said frame arranged across said groove, and bolts on the frame to tighten said plate against the arm in the groove to permit the frame to be adjusted along said arm, and at least two let-oit mechanisms on said frame.

In testimony that I claim the foregoing as my invention, I have signed mv name.

THEODORE J. GARISIO.

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