US2362770A

US2362770A - Cutting mechanism for woolen shears

Info

Publication number: US2362770A
Application number: US427127A
Authority: US
Inventors: Leland F Remington
Original assignee: CURTIS AND MARBLE MACHINE Co
Current assignee: CURTIS AND MARBLE MACHINE Co
Priority date: 1942-01-17
Filing date: 1942-01-17
Publication date: 1944-11-14
Anticipated expiration: 1961-11-14

Description

Nov. 14, 1944. L. F. REMINGTON 2,362,770

CUTTING MECfiANISM FOR WOOLEN SHEARS Flled Jan 17 1942 3 Sheets-Sheet 1 fiz/ezar lflllF/W/WZM and...

Nov. 14, 1944. L. F. REMINGTON CUTTING MECHANISM FOR w oLEN SHEARS Filed Jan. 17. 1942 5 Sheets-Sheet 2 jvz/ersr Izzy/m a, my, m

Nov. 14, 1944. L. F. REMINGTON CUTTING MECHANISM FOR WOOLEN SHEARS Sheets-Sheet 3 Filed Jan. 17. 1942 176 .2 Peinkywz a Patented Nov. 14, 1944 CUTTING MECHANISM FOR WOOLEN SHEARS Leland F. Remington, Worcester, Mass, assignor to Curtis & Marble Machine Company, Worcester, Mass, a corporation of Massachusetts Application January '17, 1942, Serial No. 427,127

6 Claims.

This invention relates to machines for shearing the face of a piece of woolen cloth or other similar fabric, as an important step in the cloth finishing process. In such machines, commonly termed woolen shears, it is customary to draw the cloth over a fixed cloth rest or guide and to provide coacting fixed and revolving cutters, which cutters perform their cutting or trimming action along a fixed straight line, more or less closely adjacent to the fixed cloth rest. In the operation of such machines, various changes in relationship between the cutters and the cloth rest and also between the fixed and revolving cutters must be effected from time to time.

It is the general object of my invention to provide an improved construction by which these various changes in relationship may be conveniently accomplished and by which desired adjustments may be reliably restored or maintained.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings,in which- Fig. l is a plan view of parts of a woolen shear embodying my improvements;

Fig. 2 is a partial side elevation, looking in a the direction of the arrow 2 in Fig. 1;

Fig. 3 is a view similar to Fig. 2 but with certain parts omitted andwith others shown in a different relationship;

Fig. 4 is a plan view, partly broken away, of a lower movable support on which the fixed cutter blade is mounted, together with certain associated parts;

Fig. 5 is an end elevation thereof, looking in the direction ofthe arrow 5 in Fig. 4; and E Fig. 6 is a partial rear elevation, looking in the. '1 direction of the arrow 6 in Fig. 4. 7

Referring to Figs'l and 2, Ihave shown a side portion of the fixedframe F of a woolen shear, which frame supports a guide or rest II] for the cloth C. I have also shown a relatively fixed blade or cutter B and a rotating cutter or revolver R.

The cutterR is constructed on a bar having gudgeons l2 and may be rotated by a plurality of belts l4 acting on a pulley IS. The gudgeons 22 are rotatably supported in bearings at each side of the machine, one of which is clearly shown in Figs. 1 to 3. Each bearing 20 is V mounted on an arm 22 which is pivoted on a I shaft 24 which extends across the machine from one side to the other.

The fixed blade B is fastened along the edge of a blade-holding p1ate'25 (Fig. 3), which in turn is mounted on a lower movable basev or support 30. The support 30 extends across the machine from one side to the other, as indicated in Fig. 4, and is mounted on a rock shaft 3|, which in turn is supported at its ends on openface bearing blocks 32 mounted on side portions of the frame F.

The blade holder plate is secured in adjusted position on the, movable support by a plurality of clamping screws 33 and by a plurality of

adiustingscrews

34 and 35. By adjustment of the screws 34' and 35, the blade B may be raised or lowered relative to the support 30 or may be rocked relative thereto. The blade is held fast by the screws 33.

The shaft 24 for the cutter bearing arms'ZZ is mounted in bearing blocks 40 (Fig.5) which are bolted to the rear of the movable support 3!] and near the oppositeends thereof. Arms 42 extend rearward from the bearing blocks 40 and form, in eifect, rearward extensions of the support 30.

A cross rod 43 (Fig. 4) connects the arms 42, and tension springs 44' (Figs. 2 and 3) are connected to the rod 43 and partially counterbalance the movable support 30 and the cutters and other parts associated therewith.

Adjustable stop screws 46 are threaded in for-,

weirdly-extending portions 'of the support -30 and may be held in adjusted position by lock nuts 41. The enlarged lower ends or heads 48 of the screws 46 rest on cams or eccentrics 50, mounted near each side of the machine on a cam shaft 58 rotatable in fixed bearings 52 (Fig. 2) at the front of the frame F. A worm wheel 54(Figs. 1 and2) is mounted near one end of the shaft 5! and is engaged by a worm 55 on a short shaft 56 providedwith a hand wheel 51. By turning the hand wheel 51, the shaft "5! and the eccentrics 5|] may be rotated, thus simultaneously and equally raising or lowering the spaced ends of the movable support 30.

The screws may be separately adjusted for initial leveling of the support 30, after which the hand wheel 51 is used for adjusting the support 30, with its fixed and revolving cutters, relative to the f xed cloth rest or guide II]. A graduated dial 53 and a fixed index 59 may be provided at one end of the shaft 5i, to indicate the amountof adjustment. The dial 58 may be calibrated to show the extent of clearance between the cloth rest 10 and the non-rotating blade B.

In the operation of a Woolen shear, it is customary to stitch the ends of successive pieces of cloth together, so that the operation of the machine may be continuous, and it is necessary for the operator to raise the cutters away from 1 the cloth rest to clear the seams as they appear at the shearing point. For this purpose, links 68 are pivoted at El to the forward ends of the movable support 38 and are connected at their lower ends to lifting devices including arms on a 1 cross shaft and manual lifting levers by which the cutters may be quickly shifted out of operative position as a seam approaches. This mechanism for manually raising the links 60 is of a usual commercial construction and, as it .forms no part of the present invention, it is not shown in detail herein.

It has been previously stated that the rotating cutter or revolver R and its shaft l2 are supported in bearings on the arms 22, which arms in turn are pivotally supported on the cross shaft 24 mounted at the rear of the movable support 38. An adjusting'screw HI (Fig, 3) is provided at the front end of each arm 22, with the enlarged lower end or head 1| thereof engaging an upper surface of the support 38. By adjusting the screws H, the desired clearance between the rotating cutter R and the non-rotating blade B may be conveniently established. The adjustment may be retained by lock nuts 12. A graduated dial [3 and index 14 enable the operator to readily determine the amount of adjustment.

Inthe operation of a woolen shear, it becomes necessary at intervals to substantially separate the blade B from the cloth rest I8, and furthermore to substantially separate the revolving cutter R from the non-rotating blade B, so that a sharpening or honing operation may be conveniently performed.

link 88 at each side of the machine, said links being pivoted at 81 to the forward ends of the arms 22 The lower ends of the links 88 are slotted at 88 to receive studs 82 in arms 83 fixed to a cross shaft 84. The shaft 84 is rotatable in fixed bearings (not shown) and is provided with a worm wheel 85 engaged by a worm 88 mounted on a short vertical shaft 81 and provided with a hand wheel 88.

By rotating the hand wheel 88, the arms 83 may be swung upward in the direction of the arrow a in Fig. 2, thus lifting the links 88 which are connected to the revolver supporting arms 22. The front ends of these arms are thus raised.

It has been pointed out, however, that the arms 22 are pivoted on the shaft 24, which shaft is mounted on the lower support 30 at a point substantially rearward of the shaft 3| by which the support 30 is pivotally sustained. Consequently, as soon as the links 88 beginto lift the arms 22 and associated parts, the weight of these parts is removed from the adjusting screws II which rest on front portions of the support 38, while at the same time a substantial part of the weight of said elements is applied to the support 38 at the axis of the shaft 24 and rearward of its pivot shaft 3 I.

The application of this weight, which coacts with the tension of the counterbalance springs 44, causes the support 30" to swing upward as indicated in Fig. 3, until the arms'42 engage fixed stop screws 98 (Figs. 2v and 3). Such movement of the support 30 causes the blade B to clear the cloth rest 10, as indicated in Fig. 3, being thus placed in suitable honing position.

After the support 30 and blade B reach the position shown in Fig. 3, continued operation of the hand wheel 88 and the links 80 swings the arms 22 about the'axi's of the shaft 24, thus lifting the cutter R from the blade B, also as indicated in Fig. 3.

It accordingly appears that by simple use of the hand wheel 88, the cutters B and R may be spaced from the fixed cloth rest and also from each other, so that sharpening or honing may be conveniently performed. By reverse movement of the hand wheel 88, the parts are as quickly and easily restored to operative position and without loss of previous adjustment.

The slots 8ll 'in the lower ends of the links 88 are provided sothat the reverse movement of the arms 83 may be continued until the' studs 82 have substantially cleared the upper ends of the slots. The slots also permit lifting of the cutters by the manual lifting levers to clear the seams.

From the foregoing description, it will be evi- 5 dent that I. have provided very convenient mechamsm for quickly and easily performing all necessary adjustments of thefixed and rotating cutters relative to each other or to the fixed cloth rest.

Iv also provide for convenient movement of these 0 parts to suitable positions for shearing, seamclearing or honing.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is.

1. In a cloth shear, a fixed frame, a cloth rest fixed in said frame, a lower cutter support pivoted on said fixed frame, a non-rotated blade mounted on said support and operatively positioned thereby adjacent said cloth rest, a revolving cutter coacting with said blade, and bearing arms on which said revolving cutter is mounted, said bearing arms being pivoted on said lower cutter support at points rearward of the pivot of said support on said fixed frame.

2. The combination in a cloth shear as set forth in claim 1, in which elevating means is provided which is effective to first raise said blade and cutter as 'a unit from said cloth rest and to thereafter raise said cutter from said blade.

3. The combination in a cloth shear as set forth in claim 1, in which elevating means is provided which is effective to first rais'e said blade and cutter as a unit from said cloth rest and to thereafter raise said cutter from said blade, all by application of continuous lifting forces to said cutter bearing arms only.

4. The combination in a cloth shear as set forth in claim 1, in which a separate adjustable stop is provided for each bearing arm, said stops engaging said lower support and being jointly effective to determine the operative position of the revolving cutter relative to the non-rotated blade.

5. The combination in a cloth shear as set 7.5 forth in claim 1, in which vertical adjusting devices are provided on the lower cutter support, said devices engaging spaced eccentric members on a cross shaft pivoted on said fixed frame, and means being provided to turn said shaft and to thereby simultaneously and equally change the elevation of both ends of said lower support.

6. The combination in a cloth shear as set forth in claim 1, in which vertical adjusting devices are provided on the lower cutter support, said devices engaging spaced eccentric members on a cross shaft pivoted on said fixed frame, and a worm wheel, worm and hand wheel being provided to turn said shaft andto thereby change the elevation of said support.

LELAND F. REMINGTON.