US2083496A

US2083496A - Thread cutting temple

Info

Publication number: US2083496A
Application number: US109816A
Authority: US
Inventors: Carl D Brown
Original assignee: Draper Corp
Current assignee: Draper Corp
Priority date: 1936-11-09
Filing date: 1936-11-09
Publication date: 1937-06-08
Anticipated expiration: 1954-06-08

Description

June 8, 1937. D, BROWN 2,083,496

THREAD CUTTING TEMPLE Filed Nov. 9, 1956 6 l0 6 la 8 a O ,O k

a K 5 lag/e \5 l I H Fig.4.

INVENTOR.

, CAEL D. Beow/v. BY' Q 2;;

ATTORNEY.

Patented June 8, 1937 UNITED STATES THREAD CUTTING TEMPLE Carl D. Brown, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Application November 9, 1936, Serial No. 109,816

10 Claims.

cutting tip cooperating with a stationary ledger blade carried by the temple, for cutting the filling threads which project from the cloth selvage. The body of the moving blade is usually formed of cast iron or bronze and the cutting tip thereof has been formed from a separate steel piece fastened to one vertical side face of the body portion. The prior constructions, wherein the steel tip was positioned in a vertical plane at one side face of the body portion of the cutter, are possessed of the disadvantages that the tip is weak in a direction laterally of the vertical plane of the blade and therefore apt to become bent, that the vertical dimension of the tip is necessarily such as to provide very little clearance over the temple roll pin, and that the depending cutting end of the tip projects beyond the rear face of the temple dangerously close to the loom reed.

An object of the present invention is to provide a temple thread cutting blade having a 0 rigid metal body portion as aforesaid, and a separate steel cutting tip formed from a strip of steel and constructed in such manner that the width of the strip extends transversely'to the vertical plane of the cutting blade, whereby the lateral strength of the tip is increased, a larger clearance over the temple roll pin may be provided, and a depending cutting end which may be formed on the tip will not be of such thickness as to project too close to the reed.

A further object of the invention is to provide a temple thread cutter blade having a rigid metal body portion provided with a lateral opening, and a separate steel cutting tip having an integral resilient loop positioned in such opening 5 and expanded by its own resilience into engagement with the. wall of the opening, for securing the tip to the body without the use of rivets or other fastening devices.

The foregoing and other objects of the invention are accomplished in the construction illustrated on the accompanying drawing, of which:

Fig. 1 is a plan View of a temple, with the. top partly broken away, showing the preferred em- 5 bodiment of the invention;

Fig. 2 is a view in elevation of the rear face of the temple;

Fig. 3 is a view in elevation of the side of the temple with the face thereof broken away to expose the thread cutting mechanism;

Fig. 4 is a view similar to Fig. 3 but showing the thread cutter blade in its forward position; and

Fig. 5 is a detail view showing the tip of the thread cutter blade detached from the body portion thereof.

The temple shown on the drawing includes a housing I adapted to be fixed to a loom frame, not shown. A temple bar 2 is slidably mounted in the housing I for reciprocation forwardly and rearwardly of the loom parallel to the selvage S of the cloth C being woven on the loom. The temple bar has a laterally projecting head 3 carrying a cloth-engaging roller ,4 on a roll pin 5. The temple head is provided with a guideway 6 which extends through the head from the front to rear thereof substantially in a vertical plane. A thread cutting mechanism is mounted in the guideway 6, for cutting the filling ends 1 which project from thecloth selvage. The temple as thus far described in detail is of usual construction, not of the present invention.

The thread cutting mechanism is also of usual construction in that a stationary ledger blade 1, having a vertical cutting edge, is fixed in the rearward end of the guideway 6 by means of a screw 8, for cooperation with a moving outter blade mounted in. and guided by the guideway. The moving cutter blade is, however, of novel construction.

The particular movable cutter blade shown on the drawing consists of a body portions and a separate cutting tip Ill. The body portion 9 is of rigid metal such as iron or bronze suitably formed into the shape shown, as by casting or forging. The body portion is provided at its forward end with 2. depending heel ll, whichis entirely outside of the guideway 6. The side faces l2 of the body portion, rearwardly of the heel I I, are preferably vertical and parallel, the thickness of the body portion being such that the cutter blade is confined by the vertical side walls of the guideway 6 to rocking and sliding movements in the vertical plane of the guideway. The cutter blade is thus rocked and moved forwardly by engagement of the loom lay (not shown) with the heel II, and is returned rearwardly by the usual spring l3.

The cutting tip I 0 is'of novel construction in that it is formed from a strip of steel, the strip being relatively thin as compared to its width, so that the width of the strip extends normal to the planes of the side faces l2 of the body portion. Preferably, as shown, the width of the tip is substantially equal to the distance between the planes of the side faces l2, and the tip is located between said planes; The forward end of the cutting tip is secured to the body portion& by a novel means to be described and the tip extends rearwardly from the body' portion and is provided at M with a cutting edge. In the form shown, the rearward end of the tip is bent downwardly and the cutting edge I4 is provided by sharpening one side edge of the down-turned end I5. I

It will be apparent that forming the tip as just described results in its having much greater strength in the direction normal to the vertical plane of the guideway 6 than prior tips constructed of sheet steel positioned in a vertical plane at one side face of the body portion. This increased lateral strength practically insures that the cutting tip will not become bent out of proper position relative to the ledger blade 1. I find that the strength of the cutting tip due to the thickness of the strip is sufficient that there is little likelihood of the down-turnedend l5 becoming bent forwardly or rearwardly. It is, also noted that by reason of this novel construction the clearance of the cutting tip over the roll pin 5 is materially increased over prior constructions, and the extent to which the tip must project beyond the rear face of the temple is materi-' ally decreased. I V I In the embodiment shown on the drawing, the cutting tip ID is firmly but detachably secured to the body portion 9 without the use of rivets or other conventional fastening devices. To this end, the body portion is provided intermediate its ends with a transverse opening I6 which preferably extends through the body portion. The body portion is also provided with a slot H which extends forwardly from the rearward end of the body portion to the opening IS. The slot H extends approximately horizontally and is preferably approximately tangent to the opening Hi. The slot is of an extent, vertically, conforming to the thickness ofthe material of which the cutting tip is formed. 7 j a The cutting tip I0 is positioned in the slot l1 and is provided with an integral resilient loop l8 located in the opening 16. The loop l8 shown on the drawing is-formed by bending the forward end of the. cutting ti-p into the form shown by Fig. 5. This loop, when not confined, is larger than the opening l6 so that when the loop is compressed and inserted into the opening it will expand,- by virtue of its resilience, into frictional engagement with the peripheral wall of the opening. The cutting tip is thus firmly, but detachably, secured to the body portion of the cutting blade.

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

1. As an article of manufacture, a'cutter blade for thread cutting'temples; said blade comprising a rigid metal body portion having a depending heel at itsforward end and substantially parallel vertical side faces rearwardlyof said heel, and a separate cuttingtip comprisedof a strip of steel fixed to said body portion and extending rearwardly therefrom, said strip being of materially greater width than thickness and beingipositioned with its width normal to the planes of said faces, the rearward end of said strip being bent downwardly and one side edge thereof being sharpened to form a cutting edge thereon.

2. As an article of manufacture, a cutter blade for thread cutting temples; said blade comprising a rigid metal body portion having a depending heel at its forward end and substantially parallel vertical side faces rearwardly of said heel, and a separate cutting tip fixed to said body portion and extending rearwardly therefrom substantially between the planes of said side faces, said tip comprised of a relatively thin strip of steel of a width substantially equal to the distance between said planes, said strip being positioned with its width normal to said planes, the rearward end of said strip being bent downwardly and one side edge thereof being sharpened to form a cutting edge thereon.

3. As an article of manufacture, a cutter blade for thread cutting temples; said blade comprising a rigid metal body portion having a depending heel at its forward end and substantially parallel 7 side edge thereof being sharpened to form a cutting edge thereon. 4. As an article of manufacture, a cutter blade for thread cutting temples; said blade comprising a rigid metal body portion having a depending heel at its forward end and a slot extending forwardly from its rearward end, the side faces of said body portion being vertical andsubstantially parallel, and a separate cutting tip comprised of a relatively thin strip of steel fixedin said slot and extending rearwardly from said body portion, the width ofsaid strip being normal to theplanes of said faces and substantially equal to the distance therebetween,-the rearward end of said strip being bent downwardly and one side edge of the down-turned portion being sharpened to provide a cutting edge. I a i 5. As an article of manufacture,-- a cutter blade for thread cutting temples; saidblade comprising a rigid metal body portion having a depending heel at its forward end and substantially vertical side faces rearwardly of said heel, said body portion having a transverse opening intermediate its ends and a slot extending from the rearward end of the body portion forwardly to said openingyand a separate cutting tip comprised of a relatively thin strip of steel in said slot and extending rearwardly from said body portion, the forward end of said strip being bent into a resilient loop frictionally engaging the peripheral wall of said opening, and the rearward end of said strip being bent downwardly and provided with a cutting edge.

6. As an article of manufacture, a cutter blade for thread cutting temples; said blade comprising tip, said body portion having a transverse opening, said tip comprising a strip of steel having its forward end bent into a resilient loop positioned in said opening and expanded by its own resilience into frictional engagement with the peripheral wall of the opening to thereby secure the strip to said body portion. 7

8. As an article of manufacture, a cutter blade for thread cutting temples; said blade comprising 10 a rigid metal body portion and a separate cutting tip, said body portion having a transverse opening intermediate its ends and a slot extending from the rearward end of the body portion forwardly to said opening, said tip comprising a strip of steel positioned in said slot and having its forward end bent into a resilient loop, said loop being positioned in said opening and expanded by its own resilience into engagement with the peripheral wall of said opening to thereby secure the tip to said body portion, said strip extending rearwardly from said slot and having its rearward end bent downwardly and provided with a cutting edge.

9. As an article of manufacture, a cutter blade for thread cutting temples; said blade comprising a rigid metal body portion having a depending heel at its forward end and substantially vertical side faces rearwardly of said heel, said body portion having an opening extending therethrough transverse to said faces and a slot substantially tangent to said opening and extending rearwardly therefrom to the rearward end of said body, said tip comprising a strip of steel supported in said slot and having its forward end bent into a resilient loop positioned in said opening, said loop being expanded by its own resilience into frictional engagement with the peripheralwall of said opening, said strip extending rearwardly from said body portion and being provided at its rear- Ward end with a cutting edge.

10. As an article of manufacture, a cutter blade for thread cutting temples; said blade comprising a rigid metal body portion having a depending heel at its forward end and substantially parallel vertical side faces rearwardly of said heel, said body having a transverse opening intermediate its ends, and a separate cutting tip comprised of a relatively thin strip of steel of a Width substantially equal to the distance between said side faces, said strip being positioned with its width normal to said faces, the forward end of said strip being bent into a resilient loop positioned in said opening and expanded by its own resilience into frictional engagement with the peripheral wall of said opening, said strip extending rearwardly from said body portion and the rearward end thereof being bent downwardly and provided with a cutting edge.

CARL D. BROWN.