US2134652A - Lockstitch sewing machine - Google Patents

Lockstitch sewing machine Download PDF

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Publication number
US2134652A
US2134652A US53552A US5355235A US2134652A US 2134652 A US2134652 A US 2134652A US 53552 A US53552 A US 53552A US 5355235 A US5355235 A US 5355235A US 2134652 A US2134652 A US 2134652A
Authority
US
United States
Prior art keywords
shaft
rotary
needle
rotary hook
transmission shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US53552A
Other languages
English (en)
Inventor
Norman V Christensen
Quist Oscar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Union Special Machine Co
Original Assignee
Union Special Machine Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Union Special Machine Co filed Critical Union Special Machine Co
Priority to US53552A priority Critical patent/US2134652A/en
Priority to DEU13517D priority patent/DE663360C/de
Priority to GB23704/36A priority patent/GB467387A/en
Application granted granted Critical
Publication of US2134652A publication Critical patent/US2134652A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks

Definitions

  • Fig. I is a view partly in longitudinal section machine frame.
  • a single needle lock Shaft I3 extends Outward through the bearing stitch machine'conveniently embodying the presbushing l5. and t0 its DIOtlnding end is Seemed ent improvements.
  • a combined hand and belt wheel I6 so that it can 25 Fig. II is a fragmentary view in side elevation be rotated either manually or by power. The of the head of the sewing machine.
  • Fig. III shows the front end elevation of the tical slot I8 (Fig. II) in the front side of the head machine. Il, and within the latter, it is pivotally connected
  • Fig. IV is an inverted plan view of the mamedially at I9 to a lazy bar 2
  • Fig. VII is a fragmentary longitudinal sectional through anOthel peil' 0f fXed guides 25 and 27 view taken as'lndcated by the arrows VIIdVlI in the interval between which it is engaged by a in Flgs.'I.V and VI. c hook 28 reaching outward from a collar 29 fixed 40
  • Fig. VIII is a fragmentary detail plan sectional on the presser bar 1.
  • Fig. x is a fragmentary view showing the head position by means of a lifting oem meer 3
  • Fig. XI is an elevation of the front end of the during sewing, there is provided a knee or pedal two-needle machine.
  • operated control arm 32 which is coupled by a t0 Fig. X11 is a fragmentary detail sectional View link 33 with the collar 29.
  • a feed dog 31 perating beneath the work support I within the openings of the throat plate 36 ⁇ (Fig. VII) of the machine and opposing the presser foot 9 is a feed dog 31 which is secured, with capacity for vertical adjustment, to a feed bar 38.
  • the feed-bar 38 has a downwardly and forwardly curved arm 39, which, at 40, has pivotal connection with the strap 4I of an eccentric 42 at the front end of a transmission shaft 43 extending longitudinally of the bottom of the work plate I and so receives its rising and falling movements.
  • the feed bar 38 and the feed lift strap 4I and eccentric 42 lie, one above the other in the vertical plane of the needle 6. The feed movements are imparted to the feed bar 38 from another eccentric 45 (Figs.
  • the rotary hook shaft 66 fits downwardly into a sleeve 61 which is journaled in a bearing bushing 68 set into a Journal member 69. At its lower end, the hook shaft 66 is formed with a tongue 10 that engages a transverse slot in a plug 1I xed within the bottom of the sleeve 61. 'I'hc rotary hook 65 is held in position by a headed axial screw 12 whereof the shank passes down through the hook shaft 66 and engages the plug 1I. Obviously, upon removing the screw 12, the rotary hook 65 can be lifted out of the machine from abovewhen required, and replaced without changing its timing with relation to the needle or feed movements.
  • the sleeve 61 extends downward into a lubricant chamber 13 afforded by the journal member 69, and at its bottom end within said chamber terminates in a bevel gear pinion 15 which meshes with the top of a driving bevel gear 16 on the transmission shaft 43. Due to this arrangement of the later on described.
  • the ratio-of the gears 15 and 16 in the present instance is such that the rotary hook 65 is revolved twicefor each reciprocation of the needle 6.
  • the gear wheel 16 is not directly.
  • journal member 69 is formed with a groove 83 which engages -a lateral horizontal tongue 84 at one side of a longitudinally-extending pendant flange 85 of the work support I and is secured by a headed clamp screw 86 whereof the shank passes through a horizontal slot 81 in said flange, see Figs. I, VI and VIII.
  • the wholeV rotary hook,unit comprefreeing the latter on the shaft 43 be shifted along 'said shaft and the ange 85 of the bed plate I to adjust the rotary hook 65 laterallydn respect to the needle 6, such adjustment being accomplished without disengagement between the hook driving bevel gears 16 and 16 since these are both carried by the housing 13, and without changing the timing of said hook in respect to the needle 6.
  • the side of the housing 13- contiguous to the needle 6 is fiat and vertical with the periphery of the rotary hook 65 overhanging it and extending over the feed bar 38 and the feed lift strap 4I and eccentric 42.
  • This construction and arrangement is advantageous in that it permits close adjustment of the rotary hook 65 relative to the needle 6 incident to positional shifting of -the unit 88 along the shaft 43.
  • the sleeve 18 is lubricated by oil introduced through a vertical duct 89 in the journal member 69, see Fig. VII. The transally adjusted when required.
  • the manner of mounting the rotary hook unit 88 and the end bearing bracket 90 for the transmission shaft 43 obviously facilitates assembling of the Imachine initially at the factory, and, moreover, makes possible easy and quick removal of said unit and bracket in the event that their replacement is necessitated by reason of derangement or wear.
  • the journal bearings 60 and 9U for the shaft 43 at opposite sides of the driving connection for the rotary hook 65,
  • the rotary hook unit 88a associated with the needle 6a, it will be observed from Fig. XII, is a reverse or left hand duplicate of the unit 88 with corresponding parts identified by the same reference numerals heretofore employed -except for addition inA each instance of the letter a for the purposes of distinction.
  • the unit 88a is independently shiftable along the flange 85 for adjustment of its rotaryVA hook lia'relative to the corresponding needle 6a. In the two-needle machine, the unit 88a takes the place of the bearing bracket 90' of the single needle machine in affording journal support to .the front end of the transmissionshaft 43.
  • the thread for the additional needle 6a in the machine of Figs. IX-XIII is tensioned by a tensioning device a like the tensioning device 25 and directed Yto a definite course by suitably positioned additional guides 23a, 21a on the head 4. It will be especially noted from Figs.
  • a needle a transmission shaft; a rotary hook unit includinga rotary hook having its shaft parallel with the needle and at right angles to the ⁇ transmission shaft, a journal member affording a lubricant chamber into which both the 4transmission and rotary hook shafts extend, a
  • a work support with a pendant flange In a lock stitch sewing machine, a work support with a pendant flange; a transmission shaft below the work support parallel'with the fla-nge; a rotary hook unit including a vertical rotary hook, a shaft for the rotary hook, a journal member affording a lubricant chamber into which the transmissionshaft and the rotary hook shaft extend, and a pair of gears within the lubricant chamber interconnecting said shafts; and means for securingthe rotary hook unit to the flange of the work support with capacity to be shifted along the transmission shaft to adjust the rotary hook laterally relative to the needle.
  • a rotary hook with its axis parallel to the needle, a drive shaft at right angles to the rotary hook axis, gearing interconnecting said rotary hook, and the shaft within a housing, and means exteriorly of the housing whereby said rotary hook can be adjusted laterally of the needle as well as circumferentially about its own axis.
  • a needle In a lock stitch sewing machine, a needle; and'complemental stitch forming mechanism including avertical rotary hook, a horizontaldrive shaft, gearing interconnecting said rotary hook and said shaft enclosed within a housing, and means exteriorly of the housing whereby said rotary hook can be adjusted 4laterally of the needle as well as circumferentially about its own n axis.
  • a frame In a lock stitch sewing machine, a frame; a plurality of needles; cooperating rotary hooks having their shafts parallel with the respective needles; a transmission shaft at right angles to the rotary hook shafts; journal members for the respective rotary hook shafts independently slidf able along the transmission shaft to permit independent adjustment of thev hooks laterally relative to the respective needles; vand means for securing the journal membersin adjusted positions to the machine frame.
  • a frame a transmission shaft; a plurality ofneedles; and rotary hook units, including rotary hooks having their shafts parallel with the respective needles and at right angles to the transmission shaft, journal members affording lubricant chambers into which the transmission shaft and the corresponding rotary hook shafts extend, pairs of intermeshing bevel gears interconnecting said transmission shaft and the rotary hook shafts within the lubricating chambers; and means for securing the rotary hook units to the frame of the machine with'capacity for being independently shifted along the transmission shaft to adjust the rotary hooks laterally relative to the respective needles.
  • a frame a plurality of needles; a transmission shaft; cooperating rotary hooks having their'shafts parallel with the respective needles and at right angles to the transmission shaft; journal members affording lubricant chambers into which the transmission shaft and the respective rotary hook shafts extend; gear wheels on the rotary hook shafts within the lubricant chambers; corresponding intermeshing gear wheels also within the respective lubricant chambers; individual sleeves whereon the last mentioned gear wheels are mounted surrounding the transmission shaft and extending respectively to the exteriors of said chambers; and securing means externally of the lubricant chambers whereby the sleeves are secured to the transmission shaft with capacity for independent circumferential adjustment to -change the timing of the corresponding rotary hooks.
  • a frame a plurality of needles; a transmission shaft; rotary hook units including rotary hooks having their shafts parallel with the respective needles and at right angles to the transmission shaft, journal members affording lubricant chambers into which the transmission shaft and the respectivev rotary hook shafts extend, individual gear wheels on the rotary hook shafts within the respective lubricant chambers, intermeshing gear wheels respectively on independent sleeves surrounding the transmission shaft and extending to the exteriors of the lubricant chambers, and means externally of said chambers whereby the sleeves are secured to the transmission shaft with capacity for independent circumferential adjustment to change the' timing of the rotary hooks; and means for securing the rotary hook units to th frame of the machine with capacity for being independently shifted along the transmission shaft to adjust the rotary hooks laterally relative to the respective needles.
  • a work support with a pendant flange; a plurality of needles; rotary hook units including vertical rotary hooks to cooperate respectively with said needles; and journal members for thefvshafts of said rotary hooks having tongue andg'roove connections with the work support to enable independent adjustment of the rotary hooks laterally relative to the respective needles; means for securing the rotary hook units in adjusted positionsl to the flange aforesaid; and means for driving the rotary hooks.
  • a work supportl with a pendant flange with a pendant flange; a transmission shaft below the work support parallel with the flange; a plurality of needles; rotary hook units including vertical rotary hooks to cooperate with the respective needles, journal members affording lubricant chambers into which the transmission shaft and the individual rotary hook shafts extend, and pairs of intermeshing gears within the lubricant chambers interconnecting the transmission shaft with the corresponding hook shafts; and means for securing the rotary hook units to the flange of the work support with capacity for independent shifting along the transmission shaft ⁇ to adjust the rotary hooks laterally relative to the respective needles.
  • a plurality of needles and complemental stitch forming mechanism including vertical rotary'hooks to cooperate with the respective needles, a horizontal drive shaft, gearing interconnecting said rotary.
  • hooks and said shaft within separate housings, and means exteriorly of said housings whereby said hooks can be independently adjusted laterally of the respective needles as well as circumferentially about their own axes.
  • a plurality of needles including rotary hooks with axes parallel to the respective needles, a drive shaft at right angles to the rotary hook axes, gearing interconnecting said rotary hooks and the drive shaft
  • said hooks can be independently adjusted laterally of the respective needles as Well as circumferentially about their own axes.
  • a needle In a lockstitch sewing machine, a needle; a horizontal shaft effecting reciprocation of the needle; aV vertical shaft carrying at its upper end a rotary hook to cooperate with the needle; a bevel gear at the lower end of the vertical hook shaft; a shaft extending parallel with the needle shaft carrying a bevel gear which at the top meshes with the bevel gear on the vertical hook shaft; and a train of spur gears interconnecting said needle and parallel shafts.
  • a work support a needle operative above the work support; a longitudinally extending rotary shaft beneath the work support; feeding means below the Work support including a feed bar and a feed lift eccentric on the shaft, one above the other in the vertical plane of the n eedle; a.-,rotary hook having its axis parallel with the needle; a gear set coordinating the rotary hook with the shaft; and a housing positionally shiftable along the shaft and enclosing the gea'nset, the side of the housing contiguous to the needle being flat and vertical with the periphery of the hook overhanging it and extending over the feed bar and the feed lift eccentric to enable close adjustment of said hook in respect to the needle.
  • a lock stitch sewing machine a work support; a pair of laterally spaced needles operative above the work support; a longitudinallyextending rotary shaft beneath the work support; feeding means below the work support lncluding a feed bar and a feed lift eccentric on the shaft, one above the other in a vertical plane centrally of the needles; a pair of cooperative rotary hooks having their axes parallel with the needles; gear ysets respectively coordinating the rotary hooks.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US53552A 1935-12-09 1935-12-09 Lockstitch sewing machine Expired - Lifetime US2134652A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US53552A US2134652A (en) 1935-12-09 1935-12-09 Lockstitch sewing machine
DEU13517D DE663360C (de) 1935-12-09 1936-08-22 Geiferanordnung fuer Doppelsteppstichnaehmaschinen
GB23704/36A GB467387A (en) 1935-12-09 1936-08-29 Improvements in lock stitch sewing machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53552A US2134652A (en) 1935-12-09 1935-12-09 Lockstitch sewing machine

Publications (1)

Publication Number Publication Date
US2134652A true US2134652A (en) 1938-10-25

Family

ID=21985059

Family Applications (1)

Application Number Title Priority Date Filing Date
US53552A Expired - Lifetime US2134652A (en) 1935-12-09 1935-12-09 Lockstitch sewing machine

Country Status (3)

Country Link
US (1) US2134652A (de)
DE (1) DE663360C (de)
GB (1) GB467387A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952229A (en) * 1958-04-04 1960-09-13 Singer Mfg Co Bobbin case opener mechanism for sewing machines
TWI493084B (zh) * 2009-01-09 2015-07-21 Duerkopp Adler Ag Double needle sewing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952229A (en) * 1958-04-04 1960-09-13 Singer Mfg Co Bobbin case opener mechanism for sewing machines
TWI493084B (zh) * 2009-01-09 2015-07-21 Duerkopp Adler Ag Double needle sewing machine

Also Published As

Publication number Publication date
DE663360C (de) 1938-08-04
GB467387A (en) 1937-06-16

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