US2308465A - Ornamental seam sewing machine - Google Patents

Description

- Jan; 12, 1943.

' .A.N.HALE I ORNAMENTAL SEAM SEWING MACHINE Fild April 2,- 1941 4 Sheets-Sheet 1 gwue/wbo'b Arihur N. Hale Jan. 12, 1943. N. HALE 2,303,465

ORNAMENTAL SEAM SEWING MACHINE I Filed April 2, 1941 43: Sheets-Sheet 2 grime/WM Jan. 12,1943".

A. HALE 7 2,308,465

ORNAMENTAL SEAM SEWING MACHINE Filed April 2, 1941 4 Sheets-Sheet 3 Art/7 u Ha/e im em I $3444.71 l. W

yra

Jan. 12, 1943. A. N'HALE 2,308,465

ORNAMENTAL SEAM SEWING MACHINE Filed April 2, 1941 4 Sheets-Sheet 4 Arthur N. Her/e Wi-fnebffi Patented Jan. 12, 1943 UNITED STATES .AT E N T OFFIC ORNAMENTAL SEAM SEWING MACHINE Arthur N. Hale, StratforIL'Conm, assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of New Jersey Application April 2, 1941, Serial No. 386,415

6 Claims.

The invention consists in the devices, combinations and arrangements of parts hereinafter described in connection with the accompanying drawings, which illustrate a preferred embodiment of the invention and in which:

Fig. 1 represents a vertical longitudinal section, partly in front side elevation, of a sewing machine containing the present improvement. Fig. 2 is a rear side elevation of the sewing machine. Fig. 3 represents an enlarged transverse section of the machine bracket-arm on substantially the line 33 of Fig. 2, the cover-plate for the feedcontrolling eccentric drive being also shown in section. Fig. 4 is a fragmentary view in vertical section substantially axially of the rearward end of the pattern-cam actuating cross-shaft and gear. Fig. 5 is a bottom plan view of the bracket- .arm and of the pattern-cam mechanism supported thereby, the arm-standard and the bracket-arm head being shown in section. Fig. 6 is a substantially horizontal section of the pattern-cam and the rearward end portion of its carrying shaft. Fig. 7 represents a disassembled perspectiveof a pattern-cam, the spur-gear associated therewith and the rearward end portion of the pattern-cam shaft.

The sewing machine illustrated in the drawings is a modification of the ornamental seam sewing machine disclosed in the U. S. patent to F. M. Card, No. 2,216,096, Sept. 24, 1940. The sewing machine has the usual frame, including a work-supporting bed-plate I 0, from one end of which rises the tubular standard I I of a bracketarm I2 which overhangs the bed-plate I ll and terminates at its free end in a head I3.

Rotatably journaled in the bracket-arm I2, and extending horizontally lengthwise thereof, is a main actuatingishaft I4 carrying at one end a belt-pulley I5. At its opposite end, the shaft I4 carries a counterbalanced crank-disk I6 connected by the usual link I! with a vertically reciprocatory and laterally vibratory needle-bar I8. Attached to the lower end of the needlebar I8 is an eye-pointed thread-carrying needle I9. The needle-barl8 is journaled for endwise reciprocation in a laterally swinging frame 20 pivotally hung at its upper end upon a fulcrumpin 2| secured to the bracket-arm head I3. The fulcrum-pin 2| provides a pivotal axis for the frame 29 whichis transverse to the axis of rotation of the main-shaft I4. Theframe 2!] is guided in its swinging movements by a headed guidestud 22 which passes through an arcuate slot 23 provided in the lower end of the frame 20, said guide-stud 22 being disposed within the head I3 of the machine bracket-arm. I

The swinging frame 20 is vibrated by a train of pattern-cam controlled connections with the main-shaft I 4. To this end, the main-shaft I4 carries a worm 24 having its hub 25 detachably secured by screws 26 to a collar 21 fast on the shaft. This arrangement provides for adjustment of the worm angularly about the shaft l4, thereby to change the timing of the mechanism actuated by said worm.

The worm 24 is in driving engagementwith a gear-wheel 28 carried by'a horizontally dis- ..posed cross-shaft 29 for rotation therewith and performing one rotation for six rotations of the main-shaft I4; said cross-shaft 29 lengthwise extending transversely of the main-shaft I 4 and being journaled for rotation in bearings provided in the bracket-arm I2. Secured upon the reduced rearward end 29' of the cross-shaft 29, by screws 39, is a pinion or driving spur-gear 3| disposed I secured to the hanger 35 is an intermediate spurgear 3?. The intermediate gear 31 is in constant mesh with the driving spur-gear 3| and is free to 'roll about said driving gear upon angular movement of the hanger when'the clamping screw 34 isloosened. The-hanger 35 is pivotally connected by a screw 38'to one end of a shiftbar 39 having a longitudinal slot 48 to receive a bracket-arm bolt upon which is threaded a upon release of the screws 34 and 4|, and for temporarily securing the hanger 35 in swing-out position. Fig. 2 of the drawings illustrates in dot-dash lines, a throw-out position of the hanger 35 and its gear 37.

In its operative position, the intermediate spurgear 31 is in mesh with a driven spur-gear 42 carried by the rearward end of a cam-shaft 43 disposed horizontally to extend transversely of the main-shaft 14. As illustrated in Figs. 6 and 7 of the drawings, the driven spur-gear 42 has its hub 44 provided with diametrally opposed slots 45 open at the inner end of said hub to receive a shaft-driving pin 46 extending from diametrically opposite sides of the cam-shaft 43. The cam-shaft 43 is rotatably journaled in horizontally spaced bearing-bosses 41 (Figs. 3 and of a supporting bracket 48 secured by screws 49 and 50 to the under side of the machine bracketarm 2. The cam-shaft 43 has a squared portion 5|, adjacent the spur-gear 42, entering a correspondingly shaped aperture 52 of a patterncam 53; the pattern-cam 53 and the driven gear 42 both being removably secured upon the camshaft 43 by a nut 54 threaded upon the rearward end of said shaft. The described arrangement provides for convenient removal of the pattemcam 53 and of the spur-gear 42, and the replacement thereof by a substitute pattern-cam and pinion.

Riding the irregular periphery of the patterncam 53 is a follower in the form of a roller 55 carried by a stud-pin 56 secured to a rock-lever 51. A spring 58 detachably anchored to the arm-standard l l and connected to the rock-lever 51 yieldingly holds the follower-roller 55 in engagement with the periphery of the pattern-cam 53. The rock-lever 51 has a split hub 59 clamped by a screw 63 upon a horizontal rock-shaft 6| journaled in spaced bearing-lugs 62 and 63 of the supporting bracket 48. The rock-shaft 6| is disposed substantially parallel to the cam-shaft 43; and suitably secured to the forward end of said rock-shaft is the hub of an upstanding segment-lever 64 endwise provided with a segmental slot 65. Pivotally connected, by a stud-bolt 66, to the segment-lever 64 for vertical adjustment in the slot 65 thereof, is one end of a link 67. The opposite end of the link 61 is apertured to receive a pivot-pin 68 having a reduced eccentric portion 69 thereof secured by a screw 19 in. the suitably apertured lower end of the swinging needle-bar frame 20.

The spur-gears 3| and 42 in the present case are of the same size and, as the cross-shaft 29 rotates at one-sixth the speed of rotation of the main-shaft 44, it will be understood that the needle I9 is reciprocated six times for each complete rotation of the pattern-cam 53.

Through the described connections with the swinging frame 29, the pattern-cam transmits lateral movements to the needle I9 and thereby induces reciprocation of the needle in separate paths determined by the shape of the patterncam. By replacing the pattern-cam 53 with others of different configuration and by changing the rotation of timing of the selected patterncam, a large variety of embroidery figures may be selectively produced by the machine and the number of stitches in the embroidery figures may be selectively varied.

As will be understood from the foregoing description, the present improvement provides convenient means both for quickly changing the rotation timing and for replacement of the pattern-cam. By swinging the intermediate gear 31 temporarily into the inoperative position thereof illustrated by dot-dash lines in Fig. 2, and by removing the cam-shaft nut 54, the driven gear 42 and the pattern-cam 53 may be replaced individually or together. The intermediate gear 31 is then secured in proper intermeshing relation with the selected driven gear as 42, thereby to drive the newly selected pattern-cam in the production of a different embroidery effect.

Any suitable work-feeding mechanism may be employed; the feeding mechanism illustrated in part in the drawings and contained in the present machine corresponding substantially with that more fully shown and described in the prior Patent No. 2,216,096 hereinbefore mentioned.

Having thus set forth the nature of the invention what I claim herein is,

In an ornamental seam sewing machine, a swinging needle-bar frame, a needle-bar journaled for endwise reciprocation in said frame, connections for reciprocating said needle-bar, a rotary pattern-cam, connections actuated by said pattern-cam for swinging said frame, a rotary driving gear, means for rotating said gear, a pattern-cam rotating driven-gear, a rotary intermediate gear, supporting means providing for bodily movement of said intermediate gear angularly about the axis of rotation of one and out of intermeshing relation with the other of said driving and driven gears, releasable means for securing said intermediate gear in intermeshing relation with said driving and driven gears, and means providing for replacement of the gear disengaged from said intermediate gear upon angular movement of said supporting means.

2. In an ornamental seam sewing machine, a swinging needle-bar frame, a needle-bar journaled for endwise reciprocation in said frame, connections for reciprocating said needle-bar, a rotary pattern-cam, connections controlled by said pattern-cam for swinging said frame, a rotary driving gear, means for rotating said gear, a pattern-cam rotating driven gear, a rotary intermediate gear in constant intermeshing engagement with said driving gear, supporting means for said intermediate gear journaled coaxially of and providing for bodily movement of said intermediate gear angularly about the axis of rotation of said driving gear, releasable means for securing said intermediate gear in intermeshing relation with said driven gear, and means for removably securing .said driven gear for rotation with said pattern-cam.

3. In an ornamental seam sewing machine having a swinging frame, a needle-bar journaled for endwise reciprocation in said frame, means for reciprocating said needle-bar, and patterncam controlled connections for swinging said frame, the improvement which consists in the provision of pattern-cam actuating mechanism including a rotary driving gear, a driven gear replaceably secured for driving said pattern-cam, a hanger journaled for angular movement about the axis of rotation of said driving gear, a rotary intermediate gear carried by said hanger in mesh with said driving gear, and releasable means for securing said hanger in a position thereof in which said intermediate gear is in driving engagement with said driven gear.

4. In an ornamental seam sewing machine, a swinging needle-bar frame, a needle-bar journaled for endwise reciprocation in said frame, connections for reciprocating said needle-bar, a rotary pattern-cam, connections controlled by said pattern-cam for swinging said frame, a rotary driving gear, means for rotating said gear, a rotary driven gear coaxial with said pattern-cam, releasable means securing said driven gear and pattern-cam for rotation in unison and providin for removal and replacement of said pattern-cam and driven gear, a rotary intermediate gear in constant intermeshing engagement with said driving gear, supporting means providing for bodily movement of said intermediate gear angularly about the axis of rotation of said driving gear, and releasable means for securing said intermediate gear in intermeshing engagement with said driving and driven gears.

5. A sewing machine having a work-support and a bracket-arm overhanging said work-support, a horizontally disposed rotary actuating shaft extending lengthwise of said bracket-arm, a swinging needle-bar frame supported by said bracket-arm, a needle-bar journaled for endwise reciprocation in said swinging frame, connections for reciprocating said needle-bar from said actuating shaft, a horizontally disposed cross-shaft journaled in said bracket-arm transversely of and deriving rotation from said actuating shaft, a driving spur-gear carried by said cross-shaft, a hanger journaled coaxially of said cross-shaft, an intermediate spur-gear rotatably journaled upon said hanger and in constant mesh with said driving spur-gear, a driven gear and a pattern-cam coaxially journaled upon said bracket-arm for unison rotation, means for replaceably securing a pattern-cam and driven gear in the operative positions thereof, means for anchoring said hanger in a position thereof in which said intermediate gear is in driving engagement with said driven gear, and connections for vibrating said needle-bar frame from said pattern-cam.

6. A sewing machine having a work-support and a bracket-arm overhanging said work-support, a horizontally disposed rotary actuating shaft extending lengthwise of said bracket-arm, a swinging needle-bar frame supported .by said bracket-arm, a needle-bar journaled for endwise reciprocation in said swinging frame, connections for reciprocating said needle-bar from said actuatin shaft, a horizontally disposed cross-shaft journaled in said bracket-arm transversely of and deriving rotation from said actuating shaft, a driving spur-gear carried by said cross-shaft, a hanger journaled coaxially of said cross-shaft, a bearing for said hanger, means for releasably clamping said hanger upon said bearing in angularly diiferent positions of said hanger, a shiftbar pivotally connected to said hanger and endwise adjustably anchored to said bracket-arm, a rotary cam-shaft disposed substantially parallel to said cross-shaft, a driven spur-gear replaceably secured to said shaft for rotation therewith and in mesh with said intermediate gear, a pattern-cam secured for rotation with said shaft and replaceable independently of said driven spurgear, and connections for vibrating said needlebar frame from said pattern-cam.

ARTHUR N. HALE.

Images