US929761A - Sewing-machine. - Google Patents

Description

G. F. GRAY.

SEWING MAGHINE.

APPLICATION FILED JUNE 5, 1907,

929,76 1 Patented Aug. l3, 1909.

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C. F. GRAY.

SEWING MACHINE.

APPLICATION FILED JUNE 5, 1907.

929,761. Patented Aug. 3, 1909.

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C. F. GRAY.

` SEWING MACHINE.

APPLICATION FILED JUNE 5, 1907.

y `929,761. Patented Aug.3,1909.

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UNITED STATES osrun CHARLES F. GRAY, SIERRA MADRE, CALIFORNIA', ASSIGNOR TC THE SINGER MANUFACTURING COMPANY, A CCRPORATION OF NEW JERSEY.

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l Specication ofLetters Patent.

Patentedhug. 3, 1.909.

Application medJune, 1907. Serial No. 377,298.

' SewingMachines, of which the following is a specification.

The problem before me in the production of my present invention was the production of ya higher speed li hter'running compound feeding sewing mac ine'than those heretofore known, and to that ultimate end I have produced and combined in my machine as an entirety various features essential to said end.

Referring to the accompanying drawings,

in the several figures of w ich like parts are similarly designated, Figure 1 isa view inV front end elevation of a scwin machine equipped with my improvedfee ing mechanism. Fig. 2 is a front `side elevation, par# tially in section. Fig. 3 is a cross-section, 1n elevation, ofthe arm standard and bed plate, together with working parts shown` partially-1n ulland partially 1n dottedlines. ig. 4 is a front side view, in elevation, of the `main shaft belt-driving pulley, and attached eccentric and eccentric rame for controlling the length of the feed movements of the ma-Y terial, the feed eccentric being shown adjusted concentricall to the Avaxis of the main or. needle-driving s aft. Fig. l5 is a viewr similar toFig. 4, showing theeccentric adl justed to the position of greatest feed 4movement.

' 1 is the bed-plate of the sewing machine, 2 the overhan'ing arm, 3 the arm standard and 4 the main. or needle-driving shaft mounted to rotate in bearings 5, 5 secured in the overhanging arm 2.

6 is the main shaft belt-driving pulle 7 the loop-taker and El the looptaker s aft mounted in bearings 9, 9 formed in the bracket 10, said bracket bein adjustably secured to the underside of the ed-plate by screws 11, 11.

12 is the loo -taker shaft pulley operatively connecte by a belt 13 wlth the lpulley 6 carried by the main shaft 4, the pu cys 6 and 12 being of the ratio ofV two to one, thus giving to the loop-taker two revolutions. to one complete actuation of the needle-carry ing bar 14l v 15, 15 are idlers for directing and support ing the belt 13, said idlers being mounted to rotate upon a shaft 16 carried by a bracket 17 secured by screws 18, 13 (one only of which is shown in dotted lines, Fig. 2) to the underside of the bed-plate, Yand 19 is the commonly-employed band-Wheel provided 6o with a beltroove 20. r t

Y V21 lis a dis carried by the shaft 4 and pro-v vided with a stud 22 u on which is journaled one end of a link 23, tle opposite end of said link being operatively connected by a stud i collar 24 with the needle-bar 14, thus, through the rotary movements of the shaft 4, effect- 111g the necessary vertical movements of the needle 25 to form stitches.

, 26 is the take-u pivoted upon a stud 27 7o secured in the over anging arm, said take-up being rovided with an arm 28 which passes throng and works freely in `an openmg 29 formed in a swivel pin 33 mounted 1n an arm 31 forming an integral portion of the link 23, y75

thus, through the rotation of the stud screw 22, motion 1s transmittedto the take-up.

32 is the presser-bar which is constructed, mounted and controlled in the usual manner and provided at its lower end with. one form of commonly-empio ed cloth- presser 33, and 34 is the usual need e thread disk tension.

35 is afeed-lifteccentric secured by ascrew 36 to the main shaft 4. Y

37 is the feed-lift eccentric connection ro- 85 vided at its u per end with a strap 38 W ich embraces sai eccentric, the lower endof said connection being 'ointed by a stud screw 39 to an arm 40 whic forms an integral part of the feed-lift rock-shaft 40 arranged'beneath 90 the bed-plate and mounted between suitable pintle 'boerin s, as 41, secured, as by screws 42, in suitab e lugs, as 43, dependin from- =the underside of the bedlate in sustanp tially the same manner as t e feed rock-shaft 44 is arra ed and nrounted on the oppositev side of the lt 13, as shown in Fig. 2u 1 To the forward end of the feed-lift rock- .shaft is adustably secured, vby a screw 45, an

arm 46' carryin at its outer end a slide-block 100 47 whichl is he d against displacement by a screw 48, said slide-block entering a cove 49 formed in the feedd0gcarrying ar 50 which carries the feed-dog 51; thus, through the connections described, the feed-dog 51 is 105 driving pulley 6 and heldf in alinement with thefaeeof said pulley by the screw 54. The

59 carrying alpin 60 which, when caused to traverse the screw thread 61, adjusts the rod 58 inthe direction of its length. The inner end of the rod 58 is cone shaped and, by the f action of the adjusting means 59, 60 and 61,

it is caused to coact with the end 62 of the screw 63 carried by the frame 52 ,-thus, in oposition to the resiliency ofthe spring 57, Forcing the eccentric 55 to the desired eccentricity, relatively to the shaft 4, for eiie'cting the desired 'feed movement. Y'

64 is a bell crank lever secured upon the inner e d lof the ,oscillating shaft 65, the arm 66 of said lever being biiurcated` to embrace the yoke 55 on the eccentric 55, and the arm` 67 being operatively connected, by a stud screw 68, with the feed-adjusting connection 69, which latter is in turn jointed by ay stud screw 70 to 'anr arm 71 secured upon the rear end of the feed rocksshaft 44, the forward Vend of said shaft having secured upon it an arm 72 which in turn is jointed to the feed- `dog-carrying bar thus, through the con nections `comprising, the parts 55', 64, 68, 69, 70, 71, 44, 72 and 50, feed movements are transmitted to the feed-dog 51; The feed rock-shaft 44 is mounted between pintle bearings `73- and 74 secured by screwsy 75, 75 in suitable bearings formedin lugs 476, 7 6 depending from the underside of the hedk plate 1.

Y To the forward end of oscillating shaftV 65 is secured a depending lever 77, the end 7 8 of `which enters' a groove 79 formed in the Vneedle-barswinging' frame 80, the upper end of said frame being pivoted upon a stud 81- secured in the overhanging, arm, thus, through the connections comprising the parts 55, 55', 64', 65, 77 .and 80 lateral movements in line with `the seam arer transmitted to the needle. The leverage given the connections for operatively connecting the lever 64 with the needle and the connections for o eratively connecting said lever-with the eeddog-carrying bar is proportioned -so as to transmit froml` thefeed eccentric y55l lateral movements of the .needle and feed movements of the eed-d`og of .like amplitude.A Y

The feed-dog 51 is provided with a needle- 'hole 82\into which the needle descends and is housed during l, the feed movements of the feed-do thus effecting a combined four-motion an needle feed. Y

said pulleys, said `be 1.. In-a feeding niechanismfor sewing inachines, a needle, a needle-carr 'ng bar, a needle-bar swinging frame in whlch said nee dlecarrying,bar Ais mounted, a needle-bar actuating shaft, a feed-dog, a feed-dog-carryin bar, an adjustable feed eccentric carried y the needie-bar-actuating shaft, means for adjusting said; eccentric relatively to the axisV of said needle-bar-actuating shaft, an osclllatinglever actuated from said eccentric, f and vconnections 'between said oscillatl ing lev'er and needle-bar swinging frame and between said oscillating leverand the feed` dog-carrying bar for effecting feed movements of like amplitude of both the needle and the feed-dog, in combination with means,

I"including, a feed-lift eccentric, for giving to the lfeeddog verticalmovements in opposite directions. j A

2. In a feedin mechanism `for sewing machines, a need e-bar` swinging frame, a` needle-carrying` bar mounted in said frame f and having movements in line with thev Istitched seam, a A feed-dog-carrving bar provided with a feed-dog, a needle-bar-driving shaft carring a belt-driving pulley, a loopl taker sha n taker shaft, a belt `for olperatively t being guided an driven in directions substantiallyytransverse to each other, an adjustably mounted frame pivotally secured to the side` of said beltdriving `pulley and provided with an eccentric, means `for adjusting said eccentricrelatively to the axis of said needle-bar-Ydrivin shaft, a bell-crankdever operated fr om ,sai eccentric, connections between said lever andthe swinging framey and between said lever yand the feed-dog-car ing bar for transe mitting feed movements o Ylike amplitude to a pulley' carried by saidfloopfV connecting` the needle and feedfdo,` in combination with means includin a fee lift eccentric for givmgt10 Said fee -dog'vertical movements 'in lid 3. In combination; the `inainfslnift 4," the,r

opposite lirections.` Y

compound-feed actuating shafts "44- and 65,

the vertical loop-taker shaft 8, the eccentric 55 on the main shaft, the connections whereby said eccentric oscillates said shafts 44 and-v` 65, wheels 6 and 12 on said main shaft and f 'loop-taker shaft, res ectively, the guide wheels -15 and the be t 13 extendingrfrom said wheel 6 around said Wheels 15 to said wheel 12, all substantially fas described chinos,I a needle, a needle-carryin bar, an osv .cillating frame in which the nee e-carrying bar is mounted, a feed-dog, alfeed-dog-car-,

'whereb the needle, loop-taker and com-v pound eed are driven to produce a stitch.

4. I n a feeding mechanism' for sewing mai'ymg. bar, a main shaft carrying a feed eccentric, means for adjustin `said eccentricA relatively to they axis of sai main shaft,li

oscillatingshaft, and 'connections between-,1.30

said oscillating shaft and feed eccentric and between seid oscillating shaft and needlebar-carrying frame for giving to the needle lateral movementsl in the line of feed, said feed eccentric, needle-oscillating shaft and connections for operatively connecting said oscillating shaft with the feed eccentrlc bel ing housed within the erm standard ,of the sewing machine, and connections between said feed eccentric and feeddog-carrying bar for giving to said feed-dog feed movements corresponding in length to the lateral movements of the needle in the line of feed, in combination with means for giving to the feed-dog vertical movements in opposite di- 15 rections.,

Signed at SierreJ Madre, in the county of Los Angeles, and State of California this 28th day of Mey A. D. 1907. y

CHARLES lF. GRAY.

Witnesses v JOHN C. PEGLER, N. H. HosMER.

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