US1214947A - Filling-fork grid for looms. - Google Patents

Description

C. E. NUTTING.

FILLING FORK GRID FOR LOOMS,

APPLICATION FILED FEB. 1|, I916- LQMQW. Patented Feb. 6,1917.

lnvenfor. Charles ENuUing,

Altys.

CHARLES E. NUTTING, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO DRAPER CORPORATION, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

FILLING-FORK GRID FOR LOOMS.

Specification of Letters Patent.

Patented Feb. 6, 191?.

To all whom it may concern:

Be it known that 1, CHARLES E. NUTTING, a citizen of the United States, and resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Filling-Fork Grids for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to improvements in fork grids for looms and the object of the invention is to provide a grid construction which will not be easily fractured.

The usual type of grid comprises a cast metal construction slotted to provide ribs adapted to cooperate with the weft fork..

The grid is usually attached to the lay, or to the hand rail or both or to some other member of the lay construction. A. common means of attachment comprises a lug extending laterally from the body of the grid adapted to be bolted to the end of the shuttle box.

These metallic grids are of course subject to the shock and jar of the lay as the same is arrested in beating up the filling and also by reason of its sudden arrest at the end of its backward movement. This frequently results in the crystallization of the metal and the fracture of the grid, particularly where the grid is supported by the lateral extension above described for in that construction there is a considerable weight of metal beyond the support, the inertia of which tends to bend the grid each time the lay is arrested and the continuous jarring or flexing of the grid, even though the latter is imperceptible, in time causes the crystallization of the web and results in its fracture.

I have discovered that this may be avoided by embedding in one end or preferably both ends, of the grid, a reinforcing member of greater tensile strength than that of the material of which the grid is composed adapted to give greater rigidity to the grid and to prevent any flexing of the webs of the grid, thereby practically eliminating the tendency of the material of the grid to crystallize.

Other features of the invention will more fully appear from the following description, the accompanying drawing, and will be pointed out in the appended claims.

In the drawings;

Figure 1 is a perspective view of the end of the lay of a loom showing the filling fork in operative relation to the fork grid carried by the lay,

Fig. 2 is a front elevation of a fork grid embodying my invention, and,

Fig. 3 is a side elevation of the same.

Fig. 1 of the drawing illustrates so much of a loom as is necessary to show the application of my invention and comprises a usual sword 1 supporting a lay 2, a hand rail 3, a shuttle guard d, and a portion of the shuttle box 5. The fork grid (3 is shown as being secured to the rear wall 7 of the shuttle box by a bolt 8. The weft fork 9 is illustrated in operative position in respect to the fork grid to engage the weft as the lay moves forward to beat up the filling.

The fork grid is usually an integral metal casting rectangular in form and slotted longitudinally to provide a series of ribs adapted to coiiperate with the tines of the weft fork in engaging the filling upon each beating up of the lay, a continuous strand of filling serving to tilt the weft fork sufficiently to avoid engagement of its looped end 10' with mechanism operated by the weft hammer or some other moving actuatorto cause a change in the operation of the loom.

The form of fork grid illustrated herein comprises a rectangular body portion 11 having a beveled or inclined upper end, said body portion being slotted longitudinally to present a series of parallel ribs 12 connected at their ends by webs 13, let. The body portion 11 is also provided with a lateral extension 15 offset from the plane of the face of the grid and provided with a slot 16 adapted to receive the bolt 8 for securing the same to the end of the shuttle box 7. This grid, heretofore has been constructed as an integral casting, usually of bronze or like material and it has been found that the continued jarring of the lay causes the same to fracture along one of the webs at the ends of the slot, usually at the upper end of the slot nearest the side which is attached to the shuttle box at the point indicated herein by the numeral 18. This fracture as above stated is largely due to the crystallization of the metal by reason of the jarring and slight flexing of the material of the webs.

I have discovered that this difficulty may be overcome by reinforcing one, or preferably both of the ends or webs 13, 1a throughout the width of the grid by an embedded member of greater tensile strength than that of the material of which the grid is composed. This reinforcing member conveniently may be a steel wire or rod 19, preferably cold drawn, which may be embedded in the mold in which the grid is made, so that the metal of the grid will be cast around said reinforcing member and caused thereby firmly to adhere to it.

This reinforcing member 19 serves to strengthen the end or ends of the grid without increasing its bulk and effectively to prevent the fiexing of the webs which connect the longitudinal ribs thus practically eliminating the crystallization of the cast metal.

While the drawing illustrates two of these reinforcing members 19, embedded respectively in the webs 13, 14: of the grid, it will be understood that a single reinforcing member may be used or that two or more may be embedded in either or each end as may be found desirable.

It will also be understood that this strengthening means may be applied to other forms of grid within the meaning and scope of my invention as defined in the following claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is;

1. An integral cast metal fork grid for Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

looms slotted longitudinally to present a plurality of parallel ribs and transverse end webs combined with a transverse metal reinforcing member of greater tensile strength than that of the material of which the body of the grid is composed, embedded in one of said webs and extending throughout the width of the grid whereby without increasing its bulk the grid is enabled to withstand the continued shock and jar of the loom without breakage of said web.

2. An integral cast metal fork grid for looms comprising a bodyportion having a lateral supporting extension, said body portion being slotted longitudinally to present a plurality of parallel ribs and transverse end webs combined with transverse metal reinforcing members of greater tensile strength cast in said webs and extending throughout thewidth of the grid whereby without increasing its bulk the grid is rendered capable of withstanding continued shock with out breakage of the webs.

8. An integral cast metal fork grid for looms slotted longitudinally to present a pair of parallel longitudinal ribs and transverse end webs combined with transverse reinforcing members of cold drawn steel wire embedded in the casting and extending throughout the width of the grid whereby the strength of the gridis increased without increase in its bulk.

In testimony whereof, I have signed my name to this specification.

CHARLES E. NUTTING.

Washington, D. G."

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