US2636521A - Box front for automatic looms - Google Patents

Description

April 28, 1953 E. E. STAUFFER 2,636,521

BOX FRONT FOR AUTOMATIC LOOMS Filed Aug. 9. 1950 FIG.I

FIG. 2

nvvlshrr'ok' ovlm e'. STAUFFER BYT ATTORNEY Patented Apr. 28, 1953 BOX FRONT FOR AUTOMATIC LO-OMS Edwin E. Stauffcr, East Lyndon, Pa.,.assignor to Lancaster Belting & Textile Supply Company, Lancaster, Pa., a partnership Application August 9, 1950, Serial No. 178,468

3 Claims. (01. 139-183) This invention relates to a box front for automatic. looms.

In an automatic loom the shuttle is partially braked by the leather covered box front which is thesubject of this invention. The function of this box front is to brake .the speed of the shuttle, to guide the shuttle into its proper position for the return throw and to receive and discharge the shuttle so that the filling is not pinched or broken.

The object of the present invention is to provide an improved face, made of leather which will wear longer, be capable of being bonded to the metal frame of the box front more perinanently and which will reduce the percentage of thread breakage by the construction of the leather facing.

It is a further object of the presentinvention to provide a fiat faced metal frame and a leather facing which can be bonded across the entire width of the frame.

It is a further object of the present invention to include the method of facing said box fronts, in which the raw leather belting is bonded securely across the entire width of the metal frame, a groove is milled in the leather facing, the groove extending into the front curved portion of said leather facing and the leather facing trimmed so that all of its edges are rounded except the bottom edges of the sides of the milled groove which are maintained at ri ht angles and the entire facing dressed with dressing and buffed to insure smoothness of said facing.

With the foregoing and other objects in view, the invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described may be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is shown in the accompanying drawing in which:

Figure 1 is a top plan of the box front.

Figure 2 is a front elevation of the same.

Figure 3 is a perspective view of the front end.

Figure 4 is a cross section on line 4-4 of Figure l.

The box front is formed with a metal frame 6 having an inturned front end I and a rear end 8.

Lugs 9, l0, and l l are formed integral with the frame and rest on the loom, bolts passing through slots in lugs 9 and ID to adjustably hold the box front in position. The frame is further formed with longitudinal slots l2 and 13 which serve as entrances for parts of the automatic loom such as the feeler fingers which make an electrical contact on the bare bobbin and operate the mechanism for the automatic. bobbin replacement.

The face of the improved box front is perfectly fiat as shown at M inv Figure 4 and contacts the leather facing I5 across the entire width, the bonds between the face 14 and the back of the leather facing [5 being, therefore, much more permanent and satisfactory than the bond in the present box fronts.

The front inturned end I is formed with the conventional thread guide [6 which functions during the first throwof the new bobbin to guide the thread in the proper position. This inturned end is recessed at I! to provide a seat against which the end of the leather facing l5 may butt. The facing I5 is secured at this point by screws l8 and carried across the face [4 of the frame to the back inturned end 8 where it is secured by similar screws [8.

After the leather facing is secured in position a slot I9 is milled in said leather facing, the milling operation forming right angle sides 20 for the slot. This slot is carried slightly around the face of the front inturned end to permit the thread to lie within the groove even though the shuttle should strike the forward curved corner 2|.

The process of aflixing the leather facing is carried out by first thoroughly bonding the leather facing to the face I 4 of the frame under pres sure, securing the ends by the screws I8. After drying the slot I9 is milled in the face of the leather, the edges around the slots l2 and I3 and along the upper edge of the milled slot l9 as well as the outside edges 2! .are hand trimmed to present a rounded surface to the shuttle and to avoid any projections on which the filling might be caught. The leather is then dressed and buffed so that all fibers lay fiat and smooth, a step which is necessary due to the milling of the slot in the leather rather than pressing the leather into a groove in the frame which is the present practice. The operation of the improved box front has resulted in considerably less filling breakage which is due to the formation of the milled slot l 9. The edges 2!) of said milled slot are square cut at the bottom and provide vertical slides which do not permit the filling to ide up to the face of the box front where it can be pinched in the forward movement of the shuttle. This pinching of the thread results ina stoppage of the loom and consequent loss of time. With the improved box front, having the milled slot and the rounded front end, the milled slot extending around and into the front end has reduced the percent of filling breakage considerably.

What is claimed is:

1. A box front for automatic looms, comprising a narrow longitudinal metal frame having forward and rear. inturned ends and provided with integral attaching lugs, the forward inturned enclbeing formed with a transverse shoulder, the face of said metal frame being formed flat with two spaced openings therein, a leather facing extend-- ing from the transverse shoulder on said forward end along the entire face and around the. rear inturned end, said facing being securedacross the entire flat Width of the metal face, and a central milled slot formed in said leather facing and-eretending around and into each of the ends, the inward edges of said slot being at right angles to prevent creep of the threads up the sides of the slot.

2. 'A box front for automatic loo-ms, .ccmprising a narrow longitudinal metal frame having for ward and rear inturned ends and provided with integral attaching lugs, said frame. being formed with a. flat facing having spaced longitudinal. openings, the forward inturned end being formed with a transverse shoulder, a leather facing abutting said transverse shoulder and extending along said metal faceand around said rear inturned end, means for securing said leather facing at each end and a bond between said leather facing and said'flat metal face, said leather facing being 4 further formed with a longitudinal milled slot having straight sides, said slot extending around and into each of the ends, the outer edges of said slot and leather facing being rounded, the inward edges of said slot being at right angles to prevent riding of the thread out of the slot,

3. A box front for automatic looms, comprising a narrow longitudinal metal frame having a flatface formed with spaced longitudinal openings and forward and rear inturned ends and vprovided with integral attaching lugs, a trans- Verse shoulder on the forward inturned end, a leather facing secured entirely across the width of said metalfacing and extending into said intnrned ends; abutting said shoulder on said forward inturned end, a longitudinal centrally located milled slot in said leather facing and extending into said forward inturned end to provide a recess for the thread of a shuttle, the sides of said slot being at right angles to the bottom to prevent climbing of the thread from the slot, the entire leather facing being smoothed and, buffed to present a smoothed finish to contact with said shuttle thread.

EDWIN E. STAUFFER.

References Cited in the file of this patent UNITED STATES PATENTS Binette Apr. 10', 1934:

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