US2076178A - Trimming and stitching machine - Google Patents

Description

April 7- G. M. EAM ES 2,076,178

TRIMMING AND STITCHING MACHINE Filed June 29, 1955 5 Sheets-Sheet l I q I Gum/M41 S Sheets-Sheet 2 April 6, 1937. G. M. EAMES TRIMMING AND STITCHING MACHINE Filed June 29, 1955 WLVneo/i I X77 q April 6, 1937. M, EAME 2,076,178

TRIMMING AND STITCHING MACHINE Filed June 29, 1935 3 Sheets-Sheet 3 George Mlames Wlfivea I I v Q VWW Patented Ann. 6 rest ftiii'idil'id earner ,lit

QFFEQE George M. Eames, Bridgeport, Cenn, nsslgnor to The Si can, N.

Application June 2%),

1d @laims.

This invention relates to sewing machines and more particularly to a sewing machine provided with a rotary cutter whereby the work may be simultaneously stitched and trimmed.

The several features of the present invention will be clearly understood from the following description and accompanying drawings in which:

Figure 1 is a front elevation, partly in section, of a sewing machine having my improved trim s ming mechanism embodied therein.

Figure 2 is a bottom plan view. Figure 3 is a sectional view taken substantially along the line 3-4-3 of Figure 1. Figure 4 is a top plan view of the trimming mechanism located above the cloth-plate, showing the supporting means for the trimmer and its actuating mechanism.

Figure 5 is a sectional view taken along the line 5-5 of Figure 1.

Referring to the drawings, 60 represents the bed of the machine upon which is mounted the standard it and overhanging bracket-arm l2 terminating in a hollow-head l3. Joumaled in the bracket-arm i2 is a main shaft it carrying at one end a hand-wheel l5 and having its opposite end operatively connected, by the link it, to the reciprocatory needle-bar il, carrying a needle 88. Journaled in the bed ill is a rotary actuating shaft l9 which is connected in driving relation with the main shaft lilby means of the belt-pulleys 2d and belt 25, the ratio between the shafts M and is being one to one. Fixed to the actu-- ating shaft 59 is a gear 22 which meshes with a gear 23 fixed to the loop-taker shaft 26, the gear ratio being two to one, and to the upper end of the shaft 26 there is secured a loop-taker 25, of the vertical axis type, left side of the needle as viewed in Figure 1.

The feeding mechanism comprises a feed-bar 26 located at one side of the loop-taker and care rylng the usual feed-dog 27. One end of the feed-bar is pivotally connected to the rock-shaft 223 which is rocked back-and-forth by a pitman is actuated by the adjustable eccentric it on the main shaft it The means for adjusting the eccentric 3b is chi and Well hown and is shown in the patent to Dial et' al. No. 718,988, dated Jan. 27, 1903. A. rising and falling movement is imparted to the feed-bar is from the actuating shaft by means of an eccentric 36 which is fixed to the shaft l9 and the member 32 which is fixed,

to the feed-bar and provided with arms 83 which embrace the eccentric 33.

My improved trimming and actuating inechasubstantially which is disposed on the cr- Manufacturing (Company, Elizaa corporation of New Jersey 11ers, Serial No. tacit (or. lifilti) nism therefor comprises a bracket 3 fixed to the under side of the bed id by the screws 35. Ro-= tatably journaled in the bracket 3% is a short vertical shaft 3t having a'gear 3i! fixed to its upper end and to its lower end there is fixed a clutch-wheel 3d. The clutch-wheel is actuated from the actuatingshaft is by means of an eccentric 39 which is adjustable by means of the screw The eccentric 39 is connected to an arm fit by the pitman d6 having one of its ends w connected to the eccentric as and its other end pivotally connected for universal movement to the arm ill by the round headed pivot-screw 42. The arm it is rotatably mounted on the short shaft 36 and is held thereon by the collar it. 15 Formed on the sum it are notches M which receiverthe ends of the usual spring-biased clutchdogs 55. A detent it is provided to prevent retro grade movement of the wheel 38. The above described clutch, which imparts to the shaft w a one way intermittent motion, is old and well known and further description is believed unnecessary.

To the top of the cloth-plate there is secured by the screws ll and B? a bracket dd formed 5 with ears d9 carrying the pintles 50 which pivotally support one and of a frame St. A bushing 52 isadjustably secured by the screw 53 to the frame 56 and a second bushing E lis adjustably secured by the screw 55 to the other end of the 30 frame. Journaled in the bushings 52 and 54% is a shaft 56 having secured to one of its ends by the set-screw 57' a gear 5? which meshes with the gear 37 carried by the shaft 36. Carried by the other end of the shaft 55 is a cutting wheel 35 5B which is fixed to the shaft for rotation therewith by the headed bolt 59 which extends through a longitudinal aperture in the shaft db and is held therein by a nut lid.

The cutting wheel 53 cooperates with a platen roller the outer periphery of which extends through an opening in the throat-plate lid. The platen roller comprises an outer race-member 68, an inner race-member 62 with a series of antifrictional elements 53 interposed therebetween. The inner race-member 62 is fixed to the end of the stud 3 which is clamped in the split hub lid of the supporting saddle 66 by the screw 67. The saddle as is adjustably secured to the bed of the machine by means of a cap-screw 68 which 0 extends through the elongated aperture 69 in one leg of the saddle and is threaded into the boss it formed on the bed of the machine, the other leg of the saddle being formed with a split hub 1| which is clamped to the bushing I2 by the screw 13.

The frame 5| is urged upwardly about its pivots by a spring 15 which has one of its ends 5 clamped to the bracket 48 by the screw 41 and its free end bent so as to underlie a portion of the frame 5 I. In order to hold. the cutting wheel 58 against the outer periphery of the race-member BI and to provide means for adjusting the pressure therebetween, the frame is formed with a reduced cylindrical portion 16 which carries a collar 11 formed with a slot 18 and a portion 80 which acts as a guard and stripper for the cutting wheel 58. To hold the collar I1 on -the reduced portion 16, a screw I9 is provided which extends through the slot 18 and is threaded into the cylindrical portion 16. This construction permits the collar TI to be turned about the cylindrical portion I6. Formed on the collar TI 20 is a boss 8| which is tapped to receive the threaded end of the screw 82 and the other end of the screw enters a notch in the head of the machine. From the above it will be obvious that by adjusting the screw 82 the pressure between the cutting wheel and the platen roller may be regulated and, when desired, the screw 82 may be loosened and the collar 11 together with the screw shifted backwardly to. permit the spring 15 to raise the frame 5| and cutting wheel 58 above the work in order that the machine may be used for the purpose of stitching only.

When the machine is operated the needle l8 and hook 25 operate in timed relation to form stitches and the feed-dog 21 advances the work in a right line. It is to be understood that the shafts i4 and i9 rotate at the same speed, the hook 25 rotates at twice the speed of these shafts and the feed-dog operates once for each rotation of the shafts I4 and I9.

Rotation of the shaft is causes the adjustable eccentric 39 to actuate, through the pitman 40, the arm 4| and clutch-dogs which impart a step by step intermittent motion to the clutchwheel 38 and shaft 36 and this motion is trans- 45 mitted to the cutting wheel 58 by the shaft 56 and the gears 31 and 51. The pressure between the cutting wheel and platen roller severs the material and the movement of the cutting wheel acts as a feed for the material and, therefore, it

is necessary to synchronize the movement of the cutting wheel with the feed-dog. This is accomplished by adjusting the screw 39' of the eccentric 39. Also when the throw of the feeddog is varied by adjusting the eccentric 30 the screw 39' may be adjusted to vary the amount of movement given to thecutting wheel and thus synchronize the two work-advancing elements.

By placing the rotary hook at one side of the line of seam formation and the platen roller on so the other side, the platen roller may be placed close to the needle and a conventional ball-bearing may be used for the platen roller. Further, interference between the hook and platen roller is avoided. It will also be observed that there are 5 no oscillating or vibrating parts above the bed which might injure the operator or interfere in any way with the use of the machine for plain stitching operations.

From the foregoing description considered in 70 connection with the accompanying drawings, the construction, manner of operation and several advantages of my improved stitching and trimming machine will be clearly and fully understood. It is apparent that such a device has a 15 wide variety of uses, and it will be understood that the form, construction and arrangement of the several elements employed may be varied. Therefore, the privilege is reserved of resorting to all such legitimate changes therein as may be fairly embodied within,the spirit and scope of the appended claims.

Having thus set forth the nature of the invention, what I claim herein is: 1 A sewing machine having in combination a bed, an overhanging bracket-arm terminating in a hollow head carried by said bed, a reciprocatory needle, needle actuating means, an actuating shaft journaled in said bed, a vertically disposed hook-shaft journaled in said bed, gearing between said shafts, a hook carried by said hook-shaft and located at one side of the needle path, a rotary trimmer located at the other side of said needlepath, and means for actuating said trimmer.

2. A sewing machine having a bed, a feed-dog for advancing the work and located below said bed, a rotary hook disposed at one side of said feed-dog, a platen roller disposed at the other side of said feed-dog, and a circular cutter located above said bed and cooperating with said platen roller to sever material.

3. A sewing machine having sewing instrumentalities including a rotary hook, a bed, a rotary actuating shaft journaled in said bed, means operatively connecting said rotary hook with said rotary shaft to cause the rotary hook to rotate at twice the speed of the shaft, an adjustable eccentric carried by said shaft, a rotary cutting wheel for severing material and means operatively connecting said eccentric with said cuting wheel.

4. A sewing machine having sewing instrumentalities including a rotary hook, a rotary actuating shaft, means operatively connecting said rotary hook with said rotary shaft to cause the rotary hook to rotate at twice the speed of the shaft, an adjustable eccentric carried by said shaft, a rotary cutting wheel for severing material and means operatively connecting said eccentric with said cutting wheel, said last named means including a vertically disposed shaft hav ing a one-way intermittent clutch secured to its lower end.

5. A sewing machine having a bed, a rotary shaft journaled in said bed, a rotary loop-taker actuated by said shaft, a vertical shaft extending upwardly through said bed, means actuated by said rotary shaft for imparting a step by step rotary movement to said vertical shaft, a rotary cutting wheel, and means operatively connecting said rotary cutting wheel to said vertical shaft.

6. A sewing machine having in combination, a bed, sewing instrumentalities including a reciprocatory needle located above said bed, feeding mechanism for advancing the work, a loop-taker located below said bed and at one side of the line of feed, a rotary cutter located at the other side of the line of feed, and means for actuating said rotary cutter.

'7. A sewing machine having in combination, a bed, sewing instrumentalities including a reciprocatory needle located above said bed, feeding mechanism for advancing the work, a looptaker located below said bed and at one side of the line of feed, a platen roller located below said bed and on the other side of the line of feed, a circular cutter cooperating with said platen roller, and means for imparting a step by step rotary movement to said cutter.

8. A sewing machine having in combination, a-

bed, an overhanging bracket-arm carried thereby,

bed, an overhanging bracket-arm carried thereby,

a reciprocatory needle, a needle-actuating shaft journaled in said bracket-arm, a rotary shaft located in said bed, means connecting said needleactuating shaft and rotary shaft for rotation at the same speed, a loop-taker shaft, a loop-taker carried thereby, means for actuating the looptaker shaft at twice the speed of the rotary shaft, a cutting wheel located above said bed adjacent the needle, an adjustable eccentric carried by said rotary shaft, a one-way clutch actuated by said eccentric, and means operatively connecting said clutch with said cutting wheel.

10. A sewing machine having, in combination, a bed, a standard and overhanging bracket-arm carried thereby, a'reciprocatory needle-bar carrying a needle, a needle-bar shaft, a rotary shaft journaled in said bed, means interconnecting said shafts whereby they are caused to rotate at the same speed, a hook-shaft carrying a rotary hook, gearing interconnecting said hook and rotary shafts whereby the hook-shaft is caused to rotate at twice the speed of the rotary shaft, an adjustable eccentric carried by said rotary shaft, a one-way clutch actuated by said eccentric, a vertical shaft extending through said bed and actuated by said clutch, a shaft carrying a circular trimmer located above said bed, gearing connecting said last mentioned shaft with said vertical shaft and a platen roller located adjacent the needle and cooperating with said circular trimmer to sever material.

11. A sewing machine having, in combination,

5 a bed, a standard and overhanging bracket-arm carried thereby, a reciprocatory needle-bar carrying a needle, a needle-bar shaft, a rotary shaft journaled in said bed, means interconnecting said shafts whereby they are caused to rotate at the 50 same speed, a hook-shaft carrying a rotary hook,

gearing interconnecting said hook shaft and rotary shaft whereby the hook-shaft is caused to rotate at twice the speed of the rotary shaft, an

adjustable eccentric carried by said rotary shaft, a one-way clutch actuated by said eccentric, a vertical shaft extending through said bed and actuated by said clutch, a shaft carrying a circular trimmer located above said bed, gearing connecting said last mentioned shaft with said vertical shaft, a platen roller cooperating with said circular trimmer and located below said bed and adjacent said needle, and means for regulating the pressure between said circular trimmer and said platen roller.

12. A sewing machine having in combination a bed, sewing instrumentalities including a reciprocatory needle, feeding mechanism for advancing the work, a rotary hook cooperating with said needle and operating about a vertical axis located at one side of the line of feed, a shaft joumaled in said bed and operating at one-half the speed of the rotary hook, a rotary cutter located above the bed and at the opposite side of the line of feed from said hook, a platen roller cooperating with said cutter, and mechanism actuated by said shaft for imparting a step by step movement to said rotary cutter.

13. A sewing machine having in combination a bed, sewing instrumentalities including a reciprocatory needle, feeding mechanism for advancing the work, a rotary hook cooperating with said needle and operating'about a vertical axis located at one side of the line of feed, a shaft journaled in said bed and operating at one-half the speed of the rotary hook, a rotary cutter located above the bed and on the opposite side of the line of feed from said hook, a platen roller located below said bed and cooperating with said rotary cutter, said platen roller being a conventional ball-bearing, mechanism including a oneway clutch for actuating said cutter and an adjustable eccentric carried by said shaft for actuating said clutch.

14. A sewing machine having in combination, a work-support, a bracket-arm terminating in a hollow-head and overhanging said work-support, a needle-bar shaft journaled in said bracketarm, a reciprocatory needle-bar journaled in said hollow-head and carrying a needle, a frame mounted upon said work-support, a shaft journaled in said frame, cooperating rotary cutter elements one of which is carried by said last mentioned shaft, and means interposed between said bracket-arm and frame for adjusting said rotary cutter elements relative to each other.

GEORGE M. EAMES.

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