US1368293A - Sewing-machine - Google Patents

Description

J. C. HINGE.

SEWING MACHINE.

APPLICATION FILED IIAY 4. 1918.

Patented Feb. 15, 1921.

3 SHEETSSHEET 1.

ATTORNEY V J. C. RiHGE. SEWING MAC'HINE.

APPLICATION FILED MAX/4. 1918;

Pmfiemed Feb 15 19216.

3 $HEETS-SHEET 2.

ATTORNEY J. C. HINGE.

SEWING MACHINE. v APPLICATION FILED MAY 4. 1918.

3 SHEETS-SHEET 3.

INVENTOR Ja/m C/W/I/a:

ATTORNEY UNITED STATES JOHN G. HINGE, OF BBIDGEPORT, CONNECTICUT, ASSIGNOR IACTUBING COMPANY, A CORPORATION OF NEW YORK.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Feb. 15, 1921.

Applicatlon'filed Kay 4, 1918. Serial No. 232,496.

To all whom it may concern:

Be it known that I, JOHN C. RINGE, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in sewing machines and more particularly to sewing machines employing a fabric feeding element situated in the rear of the point of scam formation and operating in conjunction with the usual feeding mechanism to feed heavy fabrics past the sewing machine needle.

In sewing machines generally, it is a common practlce to hinge the cloth-plate or base thereof upon the sewing machine supporting table to permit ready access to the 4 operating parts of the machine beneath the cloth-plate by swinging the machine about its hinge-axis. Sewing machines employing a pull-feed mechanism positioned in the rear of the point of seam-formation generally have such a wide cloth-plate as to render it impractical to hinge the machine in the usual manner owing to the consequent large radius of movement.

The present invention has for an object to provide a construction permitting the swinging of the machine-head about an axis intermediate the longitudinal free edges of the sewing machine cloth-plate.

Another object of this invention is to provide a machine of the class referred to with an improved pull-feed mechanism readily detachable from the machine frame without disarrangement of the sewing mechanism.

Other objects of this invention will be apparent from the following description and claims.

In the accompanying drawings, Figure 1 is a rear side elevation of a sewing machine embodying the present improvement. Fig. 2 is a bottom plan view of the sewing machine and showing a portion of the sewing machine table. Fig. 3 is a front end elevation of the sewing machine, partly in section, and omitting the sewing machine faceplate. Fig. 4 is a detail perspective view of the feed-shaft actuating friction-clutch with the parts tached.

Referring o the drawings, the sewing maclnne is constructed with a cloth-plate 1, supporting the overhanging bracket-arm 2 terminating in the head 3. Journaled in the overhanging arm is the main or driving shaft 4 adapted in the usual manner to reciprocate the needle-bar 5 in the swinging frame 6 pivotally secured upon the machine head by means of a stud 7 and adapted to be vibrated in a well known manner to cause the needle 8 carried by the needle-bar to aid in feeding the fabric. Cooperating with the needle beneath the cloth-plate 1 may be any suitable form of complemental stitch-forming mechanism and as such mechanism forms no part of the present invention, detailed reference thereto is deemed unnecessary. Mounted for vertical movement in bearings provided in the head 3 is the resser-bar 9 to which is secured the usual resser-foot 10.

The main-shaft 4 is connected by means of a belt 11 with the looper actuating shaft 12 journaled in suitable bearings beneath the cloth-plate 1, and is also provided with an eccentric embraced by the strap 13 of a pitman 14 suitably connected with a crankarm 15 of a feed actuating rock-shaft 16, journaled in bearings provided beneath the cloth-plate. The rock-shaft 16 in the usual manner actuates the feed-bar 17 to impart feeding movements to the feed-dog 18 receiving rising and falling movements from an eccentric 19 upon the shaft 12 embraced by a fork 20 on the feed-bar.

Secured to the rockshaft 16, intermediate its ends, is a slotted segmental arm 21 to which is adjustably secured one end of a link 22 of which the other end is pivotally secured upon a friction-clutch crank-arm 23 loosely supported upon a feed-shaft 24. The feed-shaft 24 is supported in bearings provided in the brackets 25 and 26 secured by screws, as 27 and 28, upon a rib 29 projecting downwardly from the cloth-plate. The crank-arm 23 is secured by screws, as 30, to a cam-sleeve 31 having a plurality of inclined cam-faces, as 32. The cam-sleeve 31 is also loosely supported upon the feed-shaft 24 and is-ada-pted to be embraced by a cylindrical driving clutch-member 33 Within which is positioned a coiled spring 34 of thereof successively de- TO THE SINGER MANU- clutch member is embraced bythe cylindrishow evidences of wear.

cal driven clutch-member 39 secured upon the shaft 24 by means of screws, as 40,

which pass through a dividing Wall 41. formed substantially centrally of the mem-- ber 39. Upon the opposite side of the dividing wall 41, the cylindrical member 39 embraces the reduced portion of a clutchmember 42, constructed substantially 'the same as the clutch-member 33 and embracing a cam-sleeve 43 identical with the camsleeve 31. The cam-sleeve 43 is detachably secured, in a suitable manner, to a collar 44 carrying a pin 45 entering an aperture in the bracket 25.

Actuation of the rock-shaft 16 to move the link 22 in the direction of the arrow shown in Fig. 3, rocks the crank-arm 23 and causes the inclined cam-faces 32 to force the rollers into gripping contact with the inner periphery of the driven clutch member 39, thereby rocking said member and the shaft 24 to which it is secured. The clutch parts upon the opposite side of the dividing wall 41 act to prevent retrograde movement of the shaft during the idle return movement of the crank-arm 23. Overthrow motion is also prevented by a spring 46 overlying a groove in the member 39and secured to the frame of the machine by means of a bolt 47. It will be noted that as the detachable cam-sleeves 31 and 43 are identical, they are interchangeable when after considerable use the cam-faces thereof The rollers are constructed approximately half the length of the cam-sleeves, and consequently by 1nterchanging the cam-sleeves, the rollers will act upon unworn cam-faces.

The feed-shaft 24 carries a feed element in the form of a ribbed roller 48 operating in a suitable opening formed in a clothplate extension 49, suitably secured upon the brackets 25 and 26 and positioned in a cut out portion of the table 50. The shaft 24 projects beyond its bearing-brackets 25 and 26, the opposite ends thereof resting upon hinge-plates 51 and 52 suitably secured to the table. The construction described permits the sewing machine to be swung ackwardlyupon the shaft 24 as an axis for access to the operating mechanism beneath the sewing machine cloth-plate.

Coiiperating with the feed roller 48 is a resser-roller 53 carried by a bifurcated arm 54 suitably secured upon an auxiliary I presser-bar 55, vertically movable in bearings provided in a Presser-bar bracket 56. At its upper end the bracket 56 is formed with an apertured arm 57 secured by means of a screw 58 upon a bushing 59 suitably secured in the head 3. The bushing 59 is slotted at its upper end to form a guideway for a guide-arm 60 clamped upon the presser-bar 55, thereby preventing axial movement of said presser-bar. A bushing 61, having knurled head 62, is threaded into the bracket 56 and provides means for adjusting the pressure exerted by a coiled spring 63 surrounding the presser-bar and bearing at its lower end against a collar 64 secured upon the resser-bar. A hand operated lifter-lever 65 is pivotally-secured upon the bracket 56 and serves in the usual manner when manipulated to lift the presserbar. The lower end of the bearing bracket 56 is sustained by an arm 66 secured upon the bracket by means of a screw 67 and clamped by means of a screw 68 upon a bushing 69, projecting below the head 3 and forming the lower bearing for the main Presser-bar 9.

The construction described permits of the ready detachment of the pull-feed mechanism when it is desired to use the sewing machine for light fabrics not requiring the use of an additional feeding element.

Having thus set forth the nature of the invention, what I claim herein is 1. In a sewing machine, in combination, a feeding mechanism including a feed-shaft, a feed-roller carried by said feed-shaft, means for actuating said feed-shaft, and means for hinging the sewing machine upon the axis of said feed-shaft.

2. In a sewing machine, in combination, a feeding mechanism including a feed-shaft, a feed-roller carried by said feed-shaft, means for intermittently rotating said feedshaft in a continuous direction, a presserroller cofiperating'with said feed-roller and means for hin the sewing machine upon the axis of said eed-shaft.

3. In a sewing machine, in combination, a cloth-plate, a cloth-plate extension projecting rearwardly from said cloth-plate, a plu-- rality of bearing brackets sustainlng said cloth-plate extension and projecting from said. cloth-plate, a feed-shaft journaled in said bearing brackets, a cloth feeding element carried b said shaft, means for actuating said fee shaft, and means for hing in the sewing machine upon an axis closely ad acent the rear edge of said cloth-plate to permit access to the operative portion of the mechanism arranged beneath the cloth-plate.

4. In a sewingmachine, in combination, a cloth-plate, a cloth-plate extension, a plurality of bearing brackets detachably secured to said cloth-plate and sustaining said including a c cloth-plate extension, a feed-shaft journaled in said bearing brackets, means for intermittently actuating said feed-shaft in a continuous direction, a cloth-feeding element carried by said feed-shaft, and means for hinging the sewing machine upon the axis of said shaft to permit access to the operative portion of the mechanism arranged beneath the cloth-plate.

5. In a sewing machine, in combination, an overhanging arm, stitch-forming mechanism including a needle-bar journaled in said overhanging arm, feeding mechanism oth-feeding element located in the rear of the point of seam formation, means for actuating said element to intermittently feed the fabric being operated upon, a clothresser cooperating with said cloth-feeding element, a cloth-presser bar, a presser-bar bracket, supporting means upon said overhanging arm for said presserbar bracket, and means for preventing axial movement of said presser-bar, including coacting guide-element's carried by said presser-bar and the presser-bar bracket supporting means.-

i 6. In a sewing machine, in combination, stitch-forming mechanism, feeding mechanism including a feeding element located in rear of the point of seam-formation, means for intermittently actuating said feeding element in a continuous direction including an actuating shaft, a clutch device, including a plurality of interchangeable camsleeves, and driving connections between said actuating shaft and one of said'camsleeves.

7. Feeding mechanism for sewing machines, comprising a rotary feeding element, and means for intermittently actuating said feeding element in a continuous direction including an actuating shaft, a driving clutch member, operative connecthe driving clutch member, a driven clutch member, and a spring embracing said driven clutch memberacting to prevent retrograde movement of the latter.

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

JOHN G. RINGE.

tions intermediate the actuating shaft and

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