US2434819A - Shuttle - Google Patents

Description

Jan. 2@, E948. E. B. TIFFT 2,434,819

SHUTTLE Filed May 24, 1945 INVENTOR.

EMERSON E .TIFFT 450 1 Map ATTORNEY Patented Jan. 20, 1948 UNITED STATES PATENT OFFICE.

SHUTTLE Emerson 13. T'fft, Hopedale. Mass, assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine 3 Claims.

means for and methods of maintaining a shuttle spur in position on the tip of a shuttle.

In modern high speed looms, the shuttle is picked across the lay at speeds up to two hundred picks per minute and, under such high speeds, it is difiicult to prevent loosening of the shuttle spurs. Various expedients have been proposed to prevent loosening of the shuttle spurs, but they have not been entirely satisfactory under all conditions of use. The use of annular wedges spaced from and surrounding the shank of the shuttle spur has been satisfactory under most conditions but even this construction does not always prevent loosening of the shuttle spur under high speed operation. It has also been proposed to use pins driven through a hole formed in the shuttle tip and in the shank of the shuttle spur but even with this construction the pin may eventually work out of the hole and permit the shuttle spur to loosen.

One object of the present invention, accordingly, is to provide an improved shuttle tip construction whereby the above mentioned difficulties will be overcome. To this end and in accordance with one feature of the invention, a shouldered p n is driven through the shank of the shuttle spur and has a shoulder which engages the spur and limits the driving of the pin, the hole in the wood of the shuttle through which the pin is driven being substantially smaller in diameter than the diameter of the shouldered portion of the pin. By the use of such a construction, the wood of the shuttle tip closes over the top of the shouldered portion of the pin and thus elfectively prevents the pin from loosening and pulling out of the hole in the shank of the shuttle spur.

With the above and other obiects in view. the invention will now be described with particular reference to the accompanying drawings which illustrate a preferred embodiment of the invention and in which:

Fig. 1 is a plan view, partly in section, of the righthand end portion of a shuttle embodying the present invention;

Fig. 2 is a view, in section, of the end portion of a shuttle prior to inserting the spur retaining pin: and

Fig. 3 is an enlarged detail sectional view showing the spur retaining pin in position.

The present invent on is illustrated as embodied in an automatically threading shuttle having a body Hi and a recess i2 in which a replaceable filling carrier or bobbin I4 is supported. A cavity l6 for receiving a threading block it! is axially alined with the recess [2 and communicates therewith. The present shuttle is illustrated as being provided with fibre covered front and back walls 20, 22. The shuttle, however, may, if desired, be of any type since the present invention may advantageously be used with any type of loom shuttle.

After the shuttle blank has been roughly shaped by beveling the end portions, the fibre front and back walls 20, 22 are glued to the shuttle body H1. The ends of the block are then cut off to length. Holes are then bored in each end of the shaped block to receive the shank 24 of the shuttle spur 26.

An annular bore concentric with the hole for the shank 24 is also provided which receives the usual metal annular wedge 28. The wedge 28 is so shaped that when the spur 26 and the wedge 28 are simultaneously driven into the shuttle tip, the wood between the wedge and the shank of the spur is compressed and locks the spur in position. This is usual construction in shuttles of this type and the method of assembling the spur and wedge in position is described in detai1 in United States Letters Patent, #1 .489 584, granted April 8, 1924, on an application filed in the name of Eugene S. Tinkham.

In order to insure that the spur 25 will remain in position under all conditions of use, a shouldered pin 39 is driven into a hole 32 drilled through the shuttle body ill from the back wall 22 thereof, through the shank 24 of the spur 26 and terminating as the end of the drill penetrates entirely through the shank 24. The pin 30 is provided with a smaller diameter portion 34 and a larger diameter portion or head 36. The hole 32 is of such diameter that the small diameter portion 34 of the pin 30 can readily be driven through the hole in the shank 24. In other words, the diameter of the hole 32 is only slightly greater than the diameter of the small diameter portion 34 so that a tight fit is provided between the pin 30 and the shank 24. The pin 38 is driven into the hole 32. with the aid of a proper tool such. for example. as a nail set. until the shoulder between the different diameter portions seats on the shank 24 as shown best in Fig. 3.

The diameter of the portion 36 is substantially greater than the diameter of the hole 32 into which it is driven. As a result, the wood adjacent to the hole 32 is compressed when the large diameter portion 36 is driven therethro-ugh; but

as soon as the pin 30 is driven into the hole 32 far enough so that the large diameter portion 36 is entirely in the hole 32, the wood behind the end of the portion 36 will expand so that the hole 32 behind the pin 30 is of lesser diameter than the diameter of the portion 36. Thus, loosening of the pin 30 and consequent withdrawal from the hole in the shank 24 is effectively prevented.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a loom shuttle, a wooden shuttle body having a recess formed therein; a metal tip hav ing a shank seated within said recess, said shank having a transverse opening therethrough, said body having an opening aligned With said transverse opening and extending outwardly therefrom through the shuttle body to one side only thereof; a pin having a head and a portion fitting snugly in said transverse opening and extending therethrough and embedded in the shuttle body, said head of said pin being larger than said opening in said shuttle body and embedded therein; whereby said pin is secured to prevent loosening of the metal tip.

2. In a loom shuttle, a wooden shuttle body having a recess formed therein; a metal tip having a shank seated within said recess, said shank having a transverse opening therethrough, said body having an opening aligned with said transverse opening and extending outwardly therefrom through the shuttle body to one side only thereof; a pin having a head and a portion fitting snugly in said transverse opening and extending therethrough and embedded in the shuttle body, the head of said pin being larger than said opening in said shuttle body and embedded therein and seated against said shank, whereby said pin is secured to prevent loosening of the metal tip.

3. In a loom shuttle, a wooden shuttle body having a recess formed therein; a metal tip having a shank seated Within said recess, said shank having a transverse opening therethrough, said body having an opening aligned with said transverse opening and extending outwardly therefrom through the shuttle body to one side only thereof; a pin having integral cylindrical portions of different diameters, the portion of smaller diameter of said pin being of the same diameter as and fitting snugly in said opening in said shank and extending therethrough and embedded in the shuttle body, and the portion of larger diameter being larger than the opening in said shuttle body and disposed within the shuttle body,

. whereby said pin is secured to prevent loosening of the metal tip.

EMERSON B. 'IIF'FT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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