US1449558A - Thread-cutting temple for looms - Google Patents

Description

- 1,449,558 M. N. MIT H HREAD OUTT'ING TEMPLE FOR LOOMS Filed Dec. 29, 1921 Y lnvenTor.

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Patented Mar. 27, 1923.

UNHTED? STATES MILLARD N. SMITH, F SANFORD, NORTH CAROLINA, ASSIGNOR TO DRAPER CORPO- 1,449,558 PATENTS OFFHCE,"

RATION, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

THREAD-CUTTING TEMPLE FOR LOOMS.

Application filed December 29, 1921. Serial No. 525,559.

To all whom it may concern:

Be it known that I, MILLARD N. SMITH, a citizen of the United States, and resident of Sanford, county of Lee, State of North Carolina, have invented an Improvement in Thread-Cutting Temples 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 thread-cutting temples for looms of the type shown in the Stimpson Reissue Patent No. 14,420 dated Jan. s, 1918.

A temple of this type comprises a body presenting a guideway, a cutter member slidably mounted in the guideway, adapted to rock therein, having a depending heel adapted to be struck by the lay upon its forward movement, and a wire spring secured at one end to the body and at the other end to the heel, and operating both yieldingly to hold the cutter member in place and to return the cutter member to its normal position after the lay has been retracted from the heel.

It sometimes happens that during the operation of the loom this spring becomes broken due to the shock or jar incident .to running the loom whereupon the cutter member is liable to be thrown out of the guideway and thus do considerable damage either to the loom or to the cloth.

It is the object of the present invention to provide a temple with an improved form of s ring which is much less liable to be broken tiian the springs as heretofore constructed and which thus practically eliminates the annoyance and danger that results from the breakage of these springs.

The nature and object of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims.

In the drawings, Fig. 1 is a side view of a portion of a thread-cutting temple embodying the invention.

Fig. 2 is a section on the line 2-2, Fig. 1.

The thread-cutting temple shown in the drawing is of the usual and familiar type, comprising a bar 1 supported by a stand 2 and carrying at one end a body 3 from which extends the usual temple head comprising the pod 4. the cap 5 and the enclosed toothed roll 6. The body 3 has depending therefrom the usual heel 7 which is adapted to be struck by the lay when it beats forward. The body is also formed with a guideway in which is slidably mounted a cutter memher 8 having at the rearward end a cutting blade' 9 that co-operates with the fixed cutting blade 10 to cut the filling. The cutter member has an integral depending heelv 11 which is adapted to be struck by the lay when it beats forward, thereby to give the cutter its cutting movement, the cutter being restored to its normal or rearward position by a spring.

The parts thus far described with the exception of the spring, are or may be all as usual in thread-cutting temples of this type and form. no part of the present invention.

The spring 12 preferably is a wire spring having one end formed into a coil 13 which encircles alug 14: extending from the heel 11. Near its other end this spring is formed into a coil 15 which encircles a lug 16 extending from the body 3, the end portion 17 of the spring resting against a ledge or shoulder 18 formed on the body, and the extremity of the spring being bent over the end of said ledge as shown at 19.

In prior constructions the portion of the wire spring between the coils 13 and 15 has been substantially straight and when the heel 11 is struck by the lay, to give the cutter its cutting movement, the flexing action of the spring takes place largely at the coil 15.

Experience has shown that with this construction, such as has been heretofore used, the springs are subjected-to breakage due apparently to the fact that the flexing movement of the spring occurs largely at the coil 15.

The present invention provides an improved type of spring which is constructed so that the flexing thereof will be distributed at diflerent points throughout the spring, thus giving the spring a much longer life. A simple and preferred construction of spring having this greater distribution of strain is shown in the drawings and is one in which the body 12 of the wire spring is provided intermediate of its ends with a coil 20 having a. plurality of turns. With this arrangement when the heel 11 is moved to the left Fig. 1 the spring will flex slightly at the coil 20 and slightly at the coil 15 and also possibly to a Slight extent at the coil 13. The entire flexing movement of the spring is thus divided so that only a portion of the flexing movement comes at any one part of the spring. By thus dividing and distributing the entire flexing movement of the spring, the strain to which the spring is subjected is thereby distributed over the spring and thus the life of the spring is lengthened. It Will be seen that the spring has free play throughout because it is entirely free and unconnected with the temple between the lugs let and 16.

Having thus described my invention what I claim as new and desire to secure by Let ters Patent, is.

1. A threadcutting temple for looms comprising a body having a guideway and a lug, a cutter member slidably mounted in the guideway and having a depending heel, and a wire spring having one end coiled about said lug and the other end connected to said depending heel, the portion of the spring between the said lug and its connection to the heel being entirely free and unconnected with the temple and presenting at an intermediate point a coil whereby the total flexure and the consequent strain to which the spring is subjected is divided between the coils thereof.

2. A thread-cutting temple for looms comprising a body having a guideway' and a lug, a cutter member slida-bly mounted in the guideway and having a depending heel, and a spring having one end coiled about the lug, and the other connected to the heel, the portion of the spring bet-ween the said lug and its connection to the heel being entirely free and unconnected with the temple and presenting at an intermediate point a portion adapted to flex more readily than the portions either side thereof.

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

MILLARD N. SMITH.

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