US1971255A - Thread cutting temple for looms - Google Patents

Description

, Gun/7M5 CoBUE/V.

21, 1934. DOUGLAS 1,971,255

THREAD CUTTING-TEMPLE FOR LOOMS Filed May 16, 1935 2 Sheets-Sheet 1 IN VEN F OR.

fkcof/c E OOUGLA s.

ATTORNEY.

Aug; 1934- F. E. DOUGLAS 1,971,255

THREAD CUTTING TEMPLE FOR LOOMS Filed May 16. 1933 2 Sheets-Sheet 2 I I I Z5 I I I I II I I I I. M 23 II II I III I I r I 1 I la I I I I I 6 I I" I I I I H I2 I W I I I "I H I J s I F IKIVENTOR.

Cu/YTo/v S. Cosme/v.

BY Z W r ATTORNEY.

Patented Aug. 21, 1934 UNETED STATES PATENT Fredric E.- Douglas, Hopedale, Mass., assignor to Draper Corporation, Hopedale, Mass., a corporation of Maine Application May 16, 1933, Serial No. 671,379 4 Claims. (01. 139-303) The present invention relates to loom temples of the thread cutting variety.

It is the usual practice to provide loom temples, on the replenishing side of filling replenishing looms, with thread cutting mechanism for trimming the loose ends left projecting from the cloth selvage at the time of replenishment of the filling supply. The usual thread cutting mechanism for this purpose includes a movable thread cutting blade which has a combined rocking and sliding movement, or a pivotal movement, and this blade is usually operated by direct engagement with the lay or some other part which moves in approximately a straight line. The lack of conformity of direction of movement of the engaging parts not only causes relative movement, and consequently friction, therebetween but also imposes considerable strain on the thread cutting blade, which frequently results in breakage of the blade or in rapid wear of the blade and guideway therefor in the temple head.

I propose to overcome the aforementioned defects by providing, in a temple, a thread cutting device wherein the movable thread cutting blade is operated by connections from a rectilinearly reciprocating slide mounted on the temple head.

A further object of my invention is to provide, in a loom temple, 2. novel andimproved form of device for positively controlling the movements of the thread cutting blade.

Other objects of the invention will become apparent.

For detailed disclosure of the preferred embodiment of my invention reference is made to the accompanying drawings, of which:

Fig. 1 is a fragmentary plan view of a temple embodying my invention, a portion thereof being broken away and appearing in section as indicated by line 1l of Fig. 2;

Fig. 2 is a front elevation of the temple shown in Fig. 1, a portion thereof likewise being broken away and appearing in section, as indicated by line 2--2 of Fig. 1;

Fig. 3 is a side elevation of the temple shown in Fig. 1, but with the cover plate removed to expose the mechanism normally covered thereby; and

Fig. 4 is a view similar to Fig. 3 but showing the movable thread cutting blade at the extreme forward end of its stroke.

The temple to which my invention has been applied includes a bar 1 adapted to be mounted in a housing carried on the breast beam of a loom, which latter parts are not shown as they are well known in the art and form no part of substantially in a verticalplane.

the present invention. The rear end of the bar 1 supports a temple head comprised of a base 2, pod 3 and cap 4 secured together by means including a screw 5, the base and pod being, in the present instance, cast integrally with the bar 1. Also cast integrally with the base is a depending heel 6 by which'the temple may be reciprocated in the usual manner. It is to be understood that the cap and pod serve to house fabric-gripping instrumentalities, such as a pin studded roller, not shown.

The thread cutting instrumentalities which I have chosen to illustrate my invention consist of a ledger blade 7 and a rockable and slidable thread cutting blade 8 mounted in a guideway 9 in the temple head. The ledger blade '7 is comprised of a bowed piece of sheet steel having at its rearward end a substantially vertical cutting edge 10, and is positioned within the guideway. The guideway extends entirely through the temple head from front to rear thereof and is positioned The movable blade 8 consists of a flat bar having at its rearward end a depending cutting tip 11, this blade being capable of rocking and sliding movements in the guideway but confined thereby to movement in a vertical plane. Movement of the forward end of the blade 8 is further restricted by, a pair of pins 12, 12 projecting from the temple head, one above and one below the blade. While the blade may pivot about the pins or slide horizontally, its forward end is prevented from any substantial vertical movement.

'The guideway and thread cutting blades just described are disclosed and claimed in my copending application Serial No. 652,345, filed Jan. T3, 1933, now Patent 1,951,600, granted March 20, 1934, and such construction is, accordingly, of the present invention only in that it is particularly adapted to be combined with a novel and improved means for operating the movable thread cutting blade, hereinafter described.

It should be understood that my invention, in certain of its aspects, contemplates the employment of other types and designs of thread cutting instrumentalities.

In the preferred embodiment of my invention the movable thread cutting blade is operated by connections from a reciprocating slide 13 mounted on the temple head and confined to rectilinear movement forwardly and rearwardly of the temple. This slide 13, in the present instance, is mounted in a guideway formed in the temple head 1 rack teeth 22.

and constituted by upper and lower ledges 14, 15, side wall 16 and cover plate 1'7. The cover plate, which appears in Fig. 1 but is omitted in Figs. 2, 3 and 4, is adapted to be secured to the end face of the temple by a screw (not shown) engaging in a threaded hole 18. It will be noted that the guideway for the slide 13 lies substantially in a vertical plane parallel to the guideway 9 which contains the thread cutting blades.

The slide 13 is reciprocated forwardly and rearwardly by means of a spring 19 and depending arm 20. The spring 19 is positioned within a longitudinally extending recess in the slide and acts in compression, being confined between a stop 21 formed on the temple head and the end wall of said slot. The arm extends downwardly and rearwardly from the forward end of the slide, and normally occupies the position shown in Fig. 3, which is in the path of the lay L.

The lay reciprocates forwardly and rearwardly in the usual manner and its movement relative to the arm 20 and slide 13 is practically along a straight line. The path of movement of the slide is parallel to the path of the lay, and, accordingly, there is substantially no tendency for the lay to impose excessive bending or twisting stresses on the slide or its guideway.

' The connections from the slide to the movable thread cutting blade for operating the latter may assume various forms, only the preferred form thereof being herein disclosed. In this form, the upper longitudinal edge of the slide 13' is in the form or" a rack, being provided with a series of An oscillating member, constituted in the present instance by a cylindrical stud 23, extends transversely of theslide and is journalled in a cylindrical aperture in the temple head. Gear teeth 24 are formed in one'end of the stud and these teeth mesh with the rack teeth 22.

An eccentric portion ofthe stud 23 may'conveniently be constituted by a pin'25'formed integrally with the stud and projectingfrom the end thereof opposite the gear teeth, the pin being offset from the axis "of the stud. This pin engages directly in an aperture in the thread cutting blade 8.

The relative'proportions and disposition of the parts are such'that when the slide 13 is inits extreme rearward position the eccentric pin 25 is rearwardly of the axis of the stud 23, and the thread cutting'blade 8 is likewise in its rearmost position with thecutting tip 11 up in position to receive the filling thread. As thelay'approaches the forward end of its stroke-it engages'the arm 20 and moves the latter and thereby the slide, forwardly. Forward movement of the slide serves to rotate the stud clockwise, Figs. 3 and 4, and the eccentric pin rocks the blade 8, to lower the tip 11, and slides it'forwardly relativeto the stationary ledger blade 7, thuscutting the filling. Fig.

4 shows theseparts atthe extreme. forward end of their movement. As. the lay-recedes the parts will be allowed to return to the position shown in Fig. 3.

Having fully disclosed the preferred embodiment of my invention, I claim:

1. A third cutting temple including a temple head, a thread cutting device including a movable cutting blade carried by the temple head, a slide reciprocably mounted ina guideway in said temple head and confined thereby to rectilinear movement forwardly and rearwardly,

said slide being provided with an arm by which it is reciprocated and being also provided with a series of rack teeth, and connections from said slide to the said cutting blade for operating the latter, which connections include an oscillating member extending transversely of said slide and provided with teeth meshing with the said rack "teeth whereby said member is oscillated by said slide.

2. A thread cutting temple including a temple head having a guideway therein, a ledger blade, a rockable and slidable cutting blade positioned in said guideway and confined to movement substantially in a vertical plane, a slide reciprocably mounted in a second guideway in said head and confined thereby to rectilinear movement forwardly and rearwardly, said slide being provided with an arm by which it is reciprocated and being also provided with a series of rack teeth, and connections from said slide to the said cutting blade for rocking and sliding the latter, which connections include an oscillating stud extending transversely of said slide and provided with teeth meshing with the said rack teeth whereby said stud is oscillated by said slide.

3. A thread cutting temple including a temple I head having a guideway therein, a ledger blade, a rockable and slidable cutting blade positioned in said guideway and confined to movement sub 'stantially in a vertical plane, anoscillating member journalled in said temple head and extending substantially perpendicularly to the plane of said cutting blade, said member being provided with an eccentric portion for rocking and sliding said cutting blade and being also provided with a plurality of gear teeth, and a reciprocating rack the teeth of which mesh with the said gear teeth for oscillating said member.

. A. A thread cutting temple including a temple headhaving a guideway therein, a ledger blade,

a rockable and slidable cutting blade positioned in said guideway and confined to movement substantially in a vertical plane, an oscillating stud journalled in said temple head and extending substantially perpendicularly to the plane of said cutting blade, said stud being provided at one end with an eccentric pin engaging said cutting blade for imparting rocking and sliding movements

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