US1644700A - Sewing machine - Google Patents

Description

og 1l 7 o. P. wA'rsoN SEWING MACHINE Filed neo. s, 1922 2 sheets-sheet 1 O.. P. WTSON .SEWING MACHINE Filed Dec. 6, 1922 {Sheets-Sheet 2 ocfn, 1921,

Patented Oct. 11, 1927.

A A l mme unirse stares rares-Tormes.

OTTO P. WATSON, OF :MICHIGAN CITY, INDIANA, V.ASSIGNO'R T0 RELIANCE MANUFAC- l l TUBING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF INDIANA.

SEWING MACHINE.

Application led December 6, 1922. Serial No. 605,142.

My invention relates to improvementsin sewing machines, and is particularly concerned 'with improvements in sewing machines embodying a double needle bar.

Considerable 'diiiiculty has heretofore been experienced with sewing machines of this typel because of the frequent breakage of the one needle bar at the point where one cr more screws pass through it. Another objection to the type of double needle bar ma chine heretofore employed is that it is necessary to stop the sewing machine before a lcorner can be turned in the goodsI which is being operated upon.

The principal objects of my invention are to provide a sewing machine of the double needle bar type which will overcome the defects in the types of machines heretofore used, by providing a machine in which the metal of the two needle bars is so disposed 'as to insure a maximum degree of strength and which do not require the passage of screws or other similar devices to secure them to adjacent parts.

Another obj ect of my invention is to provide a sewing machine of the character described which need not be stopped when it is desired to turn a corner. l

A still further object of my invention is to provide a sewing machine of the character described which is simple in construction, economical to manufact-ure and easy to operate. l

Other objects will appear as this description progresses, reference being had to the accompanying drawings, in which Figure l is a side elevation showing a portion of the head of a sewing machine embodying one form of my invention;

Figure 2 is a plan thereof; Y l

Figure 3 is a vertical longitudinal section taken on line 3-3 of Figure 2;

Figure 4 is an end view;

Figure 5 is a view similar to Figure 4 eX- cept that certain of the parts have been broken away for the purpose of better illustration; Y

Figure 6 is a view similar to Figure 5, but showing certain of the part-s in a different relation;

Figure 7 is a sectional detail; and

lFigure 8 is a transverse section taken on line 8-8 of Figure 3.

' Throughout the views similar reference characters will be used forvreferring to simi.-

lar parts, and the sections are taken lookingl in the direction ofthe small arrows. j

In the embodiment of my invention illustrated in the drawings, I have illustrated a sewing machine comprising a hollow head 10, which is so shaped as to receive the mechanism about to be described. The upper and lower sides of this head are provided with the aligned upperand lower bearings 11 and 12, respectively, the lower on-e being of greater diameter than the upper one. A hollow or tubular needle Vbar 13 is slidably mounted in the bearing 12 and a second needle bar 14, preferably formed of solid.

round stoclr, is slidably mounted in the hol#A low needle bar and the u per bearing 11. A boss 15 projects outwardly from the upper end of the hollow needle bar 13 and reciprocates in a slot 16 formed in the face plate 17 which is secured to the end of the head, thereby preventing rotation of the needle bar 13. This boss. also projects through the slot 18 formed inthe link 19.

A shaft 20, which is mounted in the arm 21 of the sewing'machine, projects into the head 10y and is provided with a crank arm 22 carryingl the eccentric pin 23. A pitman rod 24 connects the eccentric pin 23 with theV wrist pin 25 on the lower endv of the bar 26, which partially embraces the needle bar 14. The upper end of the bar 26 V.is rigidly secured to the needle bar 14 by means of the clamping block 27 (see Figures 3 and 7 and the screws 28, whichy extend through the clamping block 27 and into a projecting flange on the upper end of the bar 26. `Av boss or -pin-29-projects outwardly from the clamping block 27 and extends through an opening in the upper end ofthe linlr19. sA latch 30 is pivotally mounted upon the boss 15 and its upper end is cut away, as shown and, consequently, the needle bar 13, stac tior'iary,A I provide a pawl 32, which is'pivf @ted to the head,las` shown at 33, the head being cut :away as shown at 34 to provide'a recess between it and the face plate 17 in which the pawl can swing. This pawl is notched as shown at 3.5 to receive the lug 36, which extends outwardly from .the upper end of the latch 30, and a spring 37, one

end of which is attached to the pawl and thek other end of which is attached to a pin 38 projecting inwardly from the facev pla-te17 tends to hold the pawl in locking engagement with the lug 36. The lower Vend 39 of the pawl is cammed, so that if the latch is moved towardy the pawl 32 during the upward Stroke .of the needle bai- ,lt n0 harm will result, but the pawl 32 will be rotated 2 to the left (Figures l, 5 and 6), the vlug 36 can be brought into position to be received by the notch 35 in the pawl 32, or byV moving the latch 30 to the right, it ycan be brought into engagement with the pin 2 9.

For moving the rod ll to either ofits eX treme positions, l mount abell cra-nk lever t3 upon a bracket lflfsecured to one side of the head and connect onearm of this bell crank lever with the rod 4l by means of -a linlr l5 having` an opening inits free end in which the rod 4:1 can freely move. The otherV arm or' the bell crank lever is connected by means of a link 46 with a second bell crank lever l? mounted upon thearm of the sewing machine, and this lever may in turn be connected by means of a link 48 with a `suitable lever 49, which may beioperated by'thehand, the foot or the knee of the operator, a spring'` 50 being used to return the lever V to a position corresponding tothe position oftherodel which place-s the needle bar 1 3 in operation. p v

Itdesired,y suitable adjustable. stops 5l may be'mounted upon the side of the arm2l to limit themovement of thebell crank lever 437.

. To prevent the u-QCidel-ital'detachment of the latch; ,30 from its rivet piu 15,. und-t0 guide. it in its movements-5 l previde the link. 19 with a lateral extension 5 2; which is turned baul; upon iii-eelt as shown at 53,v Se

as toy providea slot in which the latch 30 can more. f

Whilel have deeciibedthe details @t eeestruction ot the preferred embodiment et un? invention, it to be clearly understood that my invention is uut limited te these Cle-.- tails of construction, but is capable Qt other adaptations. and. uiedifeatieus within the scopeof the appended claims.

noiayoo Having thus described my invention, what p l claim is:

i l. A sewing machine comprising a head having aligned upper aud lover bearings said lower bearing being ot larger diameter than said upper bearing, a hollow needle bar slidably mounted in said lower bearing, a second needle bar slidably mounted in said hollow needle bar and said upper bearing, a

boss projecting from said. second needle bar aperture in said lug, one lend of said rod being pivotally mounted upon said tace plate, a linlr having a bearing for the other end of' said rod, a pawl for holding said latch in its release position, andv means whereby said linlrcan be actuated to engage saidv latch with, or release it from, said boss.A

2. A sewing' machine comprising a head having aligned upper and lower bearings, a

hollow needle bar 'slidaloly mounted in 'said v lower bearing, av second needle bar slifably mounted'in said hollow needle'baij' and Said upper bearing, boss projecting from said second .needle bar, a slotted linlr secured to said boss, a face plate having a slot parallel with the slot in said link, a pin proiectug from the upper end of said hollow needle barand through the slots in the said link and Suid face plate, a latch pivotally mountedr .on said pin., said latchv comprising means for engaging said boss to lock said needle bars together, an apertured lug e);

tending from said latch, a lrod extending.

through the aperture in said lug, one Vend of Seid. rod belnaplvotally meunted upon seid tace plate, a 'luik having a-bearing for the other end of said rod, a paivl for holding'.y

said latch in its release position, and means whereby said link can be actuated to en gage said latch with, er release it from, said. boss.

A. sewing u iaclline comprising a head having aligned upper and lower bearings, a hol u* needle bar. slidahly n'iounted seid? lower bearing. a second needle bar slidahlji' imprinted in aid hollow needle bar ,andsaid upper .been a boss proyectiles, trein second needlehbar, a slotted link secured said boss. a pin projecting from the upper end ot said-v hollow needle' bai-.and thirdiigh the slot-"in the said linlr, Ylatch pivotally mounted on. said pin, said latch comprising uis- Afor eee-asias' said.. besefte aid needle bars together, an apertured lug erftending from said latch, a rod extending through the aperture in said lug, one end ot' said rod being pivotally mounted, a link having a bearing for the other end of said rod, a pawl for holding said latch in its release position, and means whereby said link can be actuated to engage said latch with, or release it from, said boss.

4. A sewing machine comprising a head having aligned upper and lower bearings, a hollow needle bar slidahly mounted in said lower bearing, a second needle bar slidahly mounted in said hollow needle bar and said upper bearing, a boss projecting from said second needle bar, a slotted link secured to said boss, a pin projecting from the upper end ot said hollow needle bar and through the slot in the said link, a latch pivotally mounted on said pin, said 'latch comprising means for engaging said boss to lock said needle bars together, a pawl for holding said latch in its release position, and means whereby said latch can be actuated to engage with or disengage said hos's.

5. A sewing machine comprising a head having spaced bearings, a hollow needlebar slidahly mounted in one of said bearings, a second needle bar slidahly mounted in said hollow needle bar and the other ot said bearings. a boss projecting from said second needle bar ahove the upper en d ot said hol low needle har, a slotted link secured to said boss., a pin projecting from the upper end of said hollow needle har and through the slot in said link, a latch pivotally mounted on said pin, said latch comprising means tor engaging said boss'to lock said' needle hars together, and means whereby said'latch can be engaged with and disengaged from said boss to permit said second lneedle bar to reciprocate relatively to said hollow needle har.

6. A sewing vmachineV comprising a head having spaced bearings, a hollow needle bar slidahly mounted in one of said bearings, a second needle bar slidahly mounted in said hollow needle bar and the other of said bearings, a boss projecting from said secondneedle bar, a slotted link secured to said boss, a pin project-ing from said hollow needle har and through the slot in said link, a latch pivotally mounted on said pin, said latch comprising means iorengaging said boss to lock said needle bars together, and means whereby said latch can be engaged with and disengaged trom said boss to permit said second needle bar to reciprocate relatively to said hollow needle bar.

7. A sewing machine comprising a head having spaced bearings, a hollow needle bar slidahly mounted in one-ot' said bearings, a second needle bar slidahly mounted in said hollow needle bar and the other of said bearings, a boss projecting from one'ot said needle bars, a slotted link secured to said boss, a pin projecting trom the other of said needle hars and through the slot in said link, a latch' pivotally mounted on said pin, said latch comprising meansv for engaging said boss to'lock saidneedle bars together, and f means vwhereby said latch can be engaged with and disengaged 'from said boss to permit one of saidk needle bars to reciprocate relatively to the other.

' 8. A sewing machine mechanism, comprising a support, a plurality ot needle bars slidahly mounted in said support, a lever pivotally mounted on one of said needle hars, a shoulder on said lever, la shoulder `on the other of said needle bars, and means on said support for selectively moving Vsaid first named shoulder into or out ot the path ot said second named shoulder to Vconnect or disconnect said needle bars, respectively.'

` 9. A sewing machine comprising a head N having spaced'bearing's, a hollow needle bar slidahly mounted in one of said bearings, a second needle bar slidahly mounted in said hollow needle bar and the other ot said bearings, and a pivotally swinging latch for connecting said. needle bars together.

l0. A sewing machine comprising a head, first and second cylindrical needle bars guided for reciprocation in said head,a latch member pivotally attached to the outside ot said iirst needle bar adapted to engage said second needle-bar, and means tor moving said latch member into andl out of latching position, said means remaining in operative engagementv with said latching member throughout the lull stroke reciprocation ot said first Vneedle bar.

1l. A sewing machine comprising'a pair of needle bars, means for reciprocating one.

ot said needle bars, a latchmember pivotally connected to one ofsaid needle bars and moving therewith, a latch actuating member having a stationary pivotal mounting, and a lostr motion connect-ion vvbetween said latch member and said latch actuating member comprising an opening in one of said members and a portion of the other of said members engaging in said opening.

12. A sewing machine comprising a pair of needle bars, means for reciprocating one of said bars, a latch pivotally carried on one of the said hars, a pawl spaced Jfrom the normal path of movement of said latch, saidv latch having a lug adapted for engagement with said pawl, and means for shitting said latch to cause the path of movement of said lug to intersect the path ot movement of said pawl.

13. A sewing machine comprising a head, a shaft guided in said head for reciprocation, said shaft being adapted to carry aneedle, a sleeve surrounding said shaft and adapted tor reciprocation thereon, said sleeve also being adapted to carry a needle, an operating `crank in said head, a link connectingsaid upper end of said sleeve terminating inter'- medate said bearings, an operating crank in said head, means operatively connecting said crank with said shaft, andv releasable Alatching means for `operatively connecting said shaft and said sleeve.

1,5. A sewing machine comprising a pair of needle bars, means for reciprocating one of said needle bars, and means for releasably latching sai-d needle bars together comprisihg a slotted link pivotally connected to one of said needle bars, and a lug` projecting from the other of said needle bars and playing in said slot.`

1-6. A sewing machine comprising a head, a pairl of `needle bars slidably mounted in said head, an operating crank having permanent operative connection with one of said needle bars for reciprocating the latter during all rotation of said crank, a latching member pivotally yconnected to one of said needle bars'for reciprocation therewith, said latching member being pivoted on a substantially horizontal axis for swinging movement in a vertical plane, a shoulder on said latching memberI adapted to engage a shoulder onk the other needle bar when said latching member has been swung' .to one position, a shoulder on saidlatch-ing member adapted to engage another shoulder, stationary relative to the reciprocations ofthe needle-bars., for holding said tiret-mentioned needle bar in stationary position when said latching member has been swung to another position, and means for vswinging said latching member between said two positions.

17. A sewing machine comprising a head, a pair of needle bars slidably mounted in said head, means for reciprocating one of said needle bars, a latehing member pivotally connected to one of said needle bars for reneedle bar when said latching member hasl been swung to one position, a shoulder on said latching member adapted to engage another shonlder, stationary relative to the reciprocations of the needle-bars, for holding said lirst mentioned needle bar in stationary position when said latching member has been swung to another position, and actuating means remaining in operative engagement with said latching member throughout the full stroke reoiprocation of its associated needle bar for swinging said latching member between said two positions.

18. A sewingmachine comprising a head, a hollow needle bar, a second needle bar slidably mounted in said hollow needle bar, a latching member pivotally connected to one of said needle bars for reciprocation therewith, said latching member having swinging movement in a substantially vertical plane, a shoulder on said latching member adapted to engage a shoulder on the other needle bar when said latching member has beenswung to open position, a shoulder on said latching member adapted to engage another shoulder, stationary relative to the reciprocations of the needle bars, for holding its associated needle bars in stationary position when said latching member has been swung to another position, and means for swinging said latchingimember between said two positions.

In witness whereof, I hereunto subscribe my name this 1st day of December, 1922.

oTTo r. wATsoN.

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