US1500688A - Inseam sewing machine - Google Patents

Inseam sewing machine Download PDF

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Publication number
US1500688A
US1500688A US133614A US13361416A US1500688A US 1500688 A US1500688 A US 1500688A US 133614 A US133614 A US 133614A US 13361416 A US13361416 A US 13361416A US 1500688 A US1500688 A US 1500688A
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US
United States
Prior art keywords
needle
shaft
machine
lever
cam
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
US133614A
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English (en)
Inventor
Laurence E Topham
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.)
United Shoe Machinery Corp
Original Assignee
United Shoe Machinery Corp
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 United Shoe Machinery Corp filed Critical United Shoe Machinery Corp
Priority to US133614A priority Critical patent/US1500688A/en
Priority to DEU6960D priority patent/DE387239C/de
Application granted granted Critical
Publication of US1500688A publication Critical patent/US1500688A/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
    • D05B69/00—Driving-gear; Control devices
    • D05B69/22—Devices for stopping drive when sewing tools have reached a predetermined position
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B15/00—Machines for sewing leather goods

Definitions

  • the invention relates to chain stitch inseam sewing machines which employ curved hook needles, and which are used in sewing the inseams of turned or welted shoes.
  • the object of the present invention is to provide a novel and efficient means for automatically performing these operations as vthe machine is stopped.
  • the invention contemplates the provision of means acting agitomatically as the machine is stopped to bring the needle to rest out of engagement with the work at the end of the last cycle of operations, and to so modify the movement of the needle during this cycle that the thread will .not be laid in the needle hook by the looper.
  • the last loop of thread will be drawn through the work by the needle during the preceding cycle, and this loop will be freed from the needle hook by the advance of the needle during the last cycle, since the needle will be retracted with ⁇ its hook empty, andY will not draw any loop during the last cycle.
  • the invention contemplates modifying the normal movement of the needle in any manner which will prevent the laying'of the thread in its hook by the looper. It ispreferred, however, to prevent the laying of the thread in the needle hook by shortening the forward movement of the needle during the last cycle of operationsw rIhe invention will be readily understood from an inspection of the accompanying drawings, Vand the following detailed description of the mechanisms illustrated therein.
  • Figure 1 is a side elevation showing an inseam sewing machine embodying the invention in its preferred form
  • Fig. 2 is a sectional elevation on a larger scale, showing so much of the machine as is necessary to illustrate the application of the present invention thereto
  • Fig. 3 is a detail view indicating the action of the needle actuating mechanism during the last cycley
  • Fig. 4 is a detail rear elevation showing the mechanism for modifying the movement of the needle.
  • the invention is shown as embodied in a welt sewing machine having the general construction and mode of operation of the machine shown and described in the patent to Eppler, No. 1,108,560, dated August 25, 1914.
  • the curvedfhook needle of the machine is indicated at 2, the looper at 4, the thread arm at 6, the welt guide at 8, the back rest or bump er at 10, the thread tension device at 12, and the cam shaft at 14.
  • the cam shaft is driven continuously by a belt 16 passing over a pulley 18 on the cam shaft, and over a pulley 2O secured to a shaft 22 in the machine base.
  • the shaft 22 is connected by bevel gears 24 to a sleeve mounted on the power shaft 26 of the machine and provided with one member 28 of a friction clutch.
  • the other member 30 of the clutch is splined on the shaft 26 so as to rotate therewith, and is acted upon by a spring32, the tendency of which is to separate the clutch members.
  • the clutch member 30 is arranged to be acted upon by a wedge 34 which is connected to a foot treadle' 36, the arrangement being such that by means of the foot treadle and wedge the speed off the machine may be regulated by varying the pressure on the treadle, or may be disconnected from the driving power by release of the treadle. ⁇
  • stopping mechanism which is similar in construction to that shown and described in the patent to Topham, No.
  • 1,191,747, dated July 18, 1916 acts to concam shaft, as the machine is stopped, theV needle advances and casts off the loop of. thread drawn through the work, and is then retracted with its hook empty, and is brought to rest out of engagement with the work, and
  • the stopping mechanism comprises a continuously ro ⁇ tating clutch member 38 loosely mounted on the cam shaft and co-operating with a clutch member 4() connected to rotate with the cam shaft and movable thereon toward and from the clutch member 38.
  • the hub of the member 40 is provided with a cam groove which is engaged by a roll on one end of a bell crank lever 42 pivotally mounted on the frameof the machine.
  • the other end of the bell crank lever is provided with a hole 44 adapted to receive a locking bolt 46.
  • the bolt is mounted in the end ofa spring-pressed slide 48, and is nor* mally held out of engagement with Vthe bell crank lever by the treadle 36, with which the bolt is connected, by a rod 50, the upper end of which is connected to a latch lever 52 pivoted to the lower end ofthe loc-king bolt and arranged to bear against the slide 48. While the treadle is depressed and the machine is in operation, the latch 52 is held against the end of the slide 48 below the shoulder 54, and the locking pin 46 is held out of engagement with the bell crank lever 42 against the tension of the spring 56, as indicated in Fig. 2.
  • the bell crank lever will therefore be oscillated idly by the cam groove in the clutch member 40, and the clutch members will remain out of engagement.
  • the latch 52 will engage the shoulder 54 and prevent upward movement of the locking bolt until the treadle has moved yupward sufficiently toenable the bolt to snap into the hole 44 in the bell crank lever 42 when this hole registers with the locking pin.
  • the continued forward rotation of the cam shaft under momentum causes the cam groove in the clutch member 40 to force the clutch members into engagement, so that the cam shaft is slowed' down to the speed of the clutch member 38, and is then driven formechanism ward at its reduced speed until the cam groove acting on the bell crank lever moves the clutch member 40 out of engagement with the clutch member 88. This occurs, and the machine lis brought to rest, as the needle reaches its retracted position.
  • the vupward movement of the locking bolt 46 as it-enters the hole in the clutch operating lever 42 is utilized to control and time the throwing into operation of the mechanism which modifles the movement of vthe needle during the last forward rotation of the cam shaft.
  • the needleactuating lever 58 through which motion is transmitted Yfrom the cam' is mounted to turn in fixed bearings -so that the motion transmitted through'the lever 58 tothe needle may be modified or varied by rocking the shaft and thus shifting the bearing about which the lever oscillates.
  • the shaft is held in the normal position indicated in Fig.
  • the shaft 66 is held normally in this position by a spring 68 ⁇ which acts upon a rod 70 con nected to a lever 72 which is secured to the shaft and is held by the springrin engagementV with anV Vadjustable stop screw 74 mounted in an arm which projects from the fixed'bearing of the shaft.
  • the means for rocking the shaft to vary the movement imparted to the needleiby the cam, 60 comprises a lever 76 loosely mounted on the shaft, and provided atone end with a roll 7 8 which engages a grooved cam 80 secured tothe cam shaft.
  • the rear end of the lever Vis provided with a substantially verticalparm 82 having a slot 84 in its upper end which is adapted to be engaged by a coupling dog 86 carried by the lever 72 which is fast on the shaft 66..l
  • the coupling dog 86 is in the formof a lever pivoted to the lever 72 and is forced in a direction to engage its upper end with the notch 84 by a leaf spring 88.
  • the lower end of thedog lever is provided with an eye ⁇ 9() through which the treadle rodY O'passes, and the rod carries a collar 92 which is arranged to engage the leverand hold the coupling dog out of action when the treadle is depressed, as indicated in Fig. 4.
  • the rod 70 is arranged to pass through a hole 94E in the free end of the brake lever 96 ofthe tension device, and the rod is provided with an adjustable collar 98 arranged to engage and operate the lever to release the tension when the shaft 66 is rocked to vary the movement imparted to the needle during the last cycle.
  • a sewing machine having, in combination, a hook needle, a looper for laying a loop of thread on the needle, actuating mechanism for the needle, and mechanism actuated from the needle actuating mechanism for modifying the mot-ion transmitted to the needle by its actuating mechanism during the last stitch cycle to cause the needle to miss the loop.
  • a sewing machine having, in combination, a hook needle, a looper for laying a loop of thread on the needle, actuating mechanism for the needle, and mechanism actuated from the needle actuating mechanism and rendered active in stopping the machine for modifying the motion transmitted to the needle during the last stitch ⁇ changing said connections to give the needle an abnormal stroke so that it will not come to loop receiving position and will carry no loop in final retracted posit-ion, and means for rendering said mechanism active in the final stitch cycle to cause the needle to miss the loop during this cycle.
  • a sewing machine having, in combination, a hook needle, a shaft, connections from the shaft for oscillating the needle, a stopping mechanism for stopping the shaft with the needle retracted, and mechanism operated from said shaft for changing said connections to give ythe needle a shortened stroke in the final stitch cycle whereby it will not come to loop receiving position and will carry no loop in final retracted position.
  • a sewing machine having, in combination, a hook needle, a cam shaft, connections from -the shaft for oscillating the needle, mechanism operated from said shaft for changing said connections to give the needle an abnormal stroke, and means for rendering said mechanism active in the final stitch cycle.
  • a sewing machine having, in combination, a hook needle, a shaft, connections from the shaft for oscillating the needle, a stopping mechanism for stopping the shaft with the needle retracted, mechanism operated from said shaft for changing said connections to short stroke, and means for controlling said latter mechanism from the stop mechanism.
  • a sewing machine having, in combination, a hook needle, a shaft, mechanism actuated by said shaft for giving the needle in each stitch cycle a normal advance and return stroke, mechanism for laying a thread loop on the needle, a stopping mechanism for stopping the machine with the needle retracted, mechanism operated from said shaft for changing the needle advancing stroke to avoid taking the loop, and means for rendering said active during the final stitch cycle.
  • a sewing machine having, in combination, a shaft, a needle, mechanism actuated from said shaft for reciprocating the needle uniformly cycle after cycle through a normal stroke,
  • a sewing machine having, in combination, a hook needle, a shaft, connections from the shaft for oscillating the needle, A

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US133614A 1916-11-27 1916-11-27 Inseam sewing machine Expired - Lifetime US1500688A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US133614A US1500688A (en) 1916-11-27 1916-11-27 Inseam sewing machine
DEU6960D DE387239C (de) 1916-11-27 1920-02-27 Schuhwerknaehmaschine mit Hakennadel und Vorrichtung zum Freimachen des Werkstueckes beim Abstellen der Maschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US133614A US1500688A (en) 1916-11-27 1916-11-27 Inseam sewing machine

Publications (1)

Publication Number Publication Date
US1500688A true US1500688A (en) 1924-07-08

Family

ID=22459485

Family Applications (1)

Application Number Title Priority Date Filing Date
US133614A Expired - Lifetime US1500688A (en) 1916-11-27 1916-11-27 Inseam sewing machine

Country Status (2)

Country Link
US (1) US1500688A (de)
DE (1) DE387239C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3038428A (en) * 1958-01-20 1962-06-12 Sagem Stitching machines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL51902C (de) * 1937-04-01
DE918545C (de) * 1940-11-04 1954-09-30 United Shoe Machinery Corp Selbsttaetig arbeitende Schuhmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3038428A (en) * 1958-01-20 1962-06-12 Sagem Stitching machines

Also Published As

Publication number Publication date
DE387239C (de) 1923-12-21

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