US1005181A

US1005181A - Welt-guide mechanism for welt-shoe-sewing machines.

Info

Publication number: US1005181A
Application number: US59578310A
Authority: US
Inventors: Andrew Eppler
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1910-12-05
Filing date: 1910-12-05
Publication date: 1911-10-10
Anticipated expiration: 1928-10-10

Description

A. EPPLBR. WELT GUIDE MECHANISM r011 WELT SHOE SEWING MACHINES.

, APPLIOATIOI FILED 1320.5, 1910. 1,005, 181 Patented Oct. 10, 1911.

% fmkm j; jlzveyglor Mr A. EPPLER. WELT GUIDE MECHANISM FOR WELT SHOE SEWING MACHINES.

APPLICATION FILED no.5, 1910.

005,181. Patented Oct. 10,1911.

. I 2 SHEETS-SHEET 2.

n- STATES PATENT onr on mmmwer tm rivnn,,-nns sncnusnrrs, ASSIGNOR T umrnnsnonnaenrnnnir comon PATERSON, nnw JERSEZVA-GOBPQBATIQN,OE-NEW'JEBSEY;

- wnm-eurnnmnennmsn ron wnrr snon-snwme mcn'rnns.

To mllwhom it may'c'onoem: Beit known thatl, ANDREW EPPLER, a citizen of thez United. States, residing at, Lynn, in the 'county of: Essex and State of Massachusetts,;.have invented'certain new and;use-

ful Improvements 1, in? W elt-Guide Mechanism for Welt ShoeSewing Machines; and

I do hereby-declare the following to be a full, clear, and exactidescri-ption of the in- .vention,- such' as will enable others skilledin use thesameQ y -The present-invention is intended pri1na- I rily as an improvement onv the welt guide mechanism disclosed-in applicants prior application, Serial No. 529,412, filed November the art to whichit appertains to make-and 22, 1909. 1111 said application a welt shoe sewing machine is-disclosed provided with a welt guide which is moved toward and from the shoe during each cycle of operations of the machineand with a locking device for locking the welt guide in. its forward position durin t the first cycle of operations, the object oft is locking'device being to enable the seam to be started close to the end of the welt without the use of ,a welt holding device in addition to the welt guide. The

machine; disclosed in said application is also-provided with a tension re easing mechanism operated by a backward move ment ofthe cam-shaft and with conneclever arranged to engage a clutch boX formi-ngapart 'ofa welt guide slide actuating mechanism.- During the operatlon of the :machine, insewing aseam this locking lever is held latched in lnoperative position but as soon as the cam shaft is turned backward the locking lever is unlatched and allowed to move-into a position to hold-:ihe; weltguide in its forwardzposition and prevent itsire 'traction'. The. welt guide. is thus locked againstbackward movement as-soon. as the 'direction 'of rotation ofthe cam shaft 1s re- -.v

versedlandconsequentl'y. the only retracting 1 movement:- imparted to the. welt guide to. per

mit the insertion .of work is that] produced "--by- =the connections between the weltsgu de Fund the: tension releasing mechanism. .111

actual practice on certain classes ofwork it Specification of Letters Patent. yatentefl. 061 510, a plicationfiledflecemher 5,; 910. Ls -ml- Np;- ssuaa."

has" been-.-;found that t" ment is not sufiicient.

'Onembjectof theinvenition it m-ten thiszdefect and permit the welt "g'iiid-toibe.

retracted:- the fdesired amount for 'inser Another object-of the'iinjvention'istdpro} vide an improvedmechanism for holdingthe guided-in -Position during/ht least one cycle of operations of the machine,

comprising :asmall number of parts Tar ranged .=in.a simple and compact rminr'ler Other objects oi the invention are general to improve the construction,v arrangement and mode of operationfofthefvariousv parts of the welt sewing machine. r I

- 1th the, above objects "in view the present guide mechanism of a shoe invention consists in the constructions, conibinations. and; arrangements of parts herein after described" and claimed the advantages I ofwhich will be obvious jto" those in the art from the followingdescription?" .T he severalfeatu'res of the-presentinvcntionwiill be clearly understood. from an."in-

spection of the accompanying drawings" which,

Figure: 1 isa view in side elevation of the ward. Fig. 2-is a viewsiinilar" of so much of the machine-Ins islnecessaryto' welt shoe sewing machine embodyingthe preferred form, the parts I of illustrate. the connectionofthe'present inv'ention therewith, the parts being' shown. in

the position which they assume justafter'the 'machine has .b een started" into operation Fig. 3 isfla :detail'view in side elevation 'i'll'us-g trating 'the position of certain or the."parts during the first. forwardifotation of the cam shaft. Fig. 4 is a viewgfsimilarto Fig. 3

illustrating the positionofthe parts during.

the normal operationof the machine ing. a seam, and Fig- .15; s}? vii ew ot the hittchlne in side elev'ationjf partly 7 showing particularly the a mechanism i for actuating the weltiguideslide'. h e. pt ni h me elj ismii locking: the! welt guide in its I advanced position; the var ous parts' 'ofi the machine 1llust rated the: drawings are mmswndmg Parts o the a i l' 'nism .areflindicated at a d.,16 and the are engaged .byfth'ese brakes V10 vvclt guidejslide 10." The sp1ing,.which acts upon the'; we1t- -uide'slide to'press the welt guidein'toacon ct-withthe" work is indi-' hated} at- 11, and, the cam actuated lever i which the welt, guide slide .is 're in LciprO cated during the normal operation ofvthe;' nlachi'ne, is indicated-at 12. The clutch bo'x'iwhich'surrounds the welt guide slide is -indicated at 13 and the yieldinglinkcon- I necting the clutch box-and the lower. end of 2:0 I I struction,farran'gement and mode of operaati'onf of" these parts will be obvious from an description.

.-indi cated' at '17" and 18; he; pivoted ale rs 'carrying the brake shoes are'indicated heatingthe two levers is indicated at .21.

Qtra'ct thefwelt guide} slide-is indicated. at "23. ,,The"liell.crank-towhich the rod 22' is 49 pivotally connected is indicated at 24 and the-T arm' which'is pivotally mounted on the bell crank-24 and provided with curved sur- Eace'sto engage a: collar on the cam shaft.-

indicated at 25. The construction and ar-' 1 f ement of these parts are fully'set forth t jeapplication' .hereinbefore' referred to" necessaryj I I In the constructlon disclosed 1n appli- 5.0

and further I description is considered unvided1with an offset to engage the screw head '26of the clutch box 13, a latch to lock the locking lever in inoperativeposition dur- I ingthen'o'rmal operation of the machine and 1 a awlto, hold t wlth tlie' lcver during the first cyc e of opferationsfl A connection to the tension r'eleas-' mechanism was. also provided by means Joffwhichthe latch .was moved out of en= gagementmith thelever and into engage- E en't withthezpawl when the machine was ner the clutch box 13 is locked against backthelever12 is indicated at 14. The con inspection-of the drawings without further.

Y at iilf'aiidZQyand the-spring-press'edrod concants prior application above] referred to,. 'a 'mechanism was provided for locking the :welt guide in its forward position during the -first cycle" of operations of the machine, said' m'echanisin coinprising'a pivoted lever pro over the upper end of the latch 28. The

e latch out of engagement .and a retracting movement is imparted to stopped and the direction of rotation of the cam shaft reversed. With the" locking lever, latch, pawl, and connection to the tension releasing mechanism arranged in this man- 0 ward movement as soon as the cam shaft is 7 turned backward and the only retracting movement" imparted to the welt guide is that produced by the oscillation of the bell crank 23, even if the camshaft is rotated 7 backward a. sufiicient distance 'to actuate the lever 12. j I I f In accordance with'the present invention .an improvedconstruction and arrangement of parts is provided which enables. the welt guide to be retracted an additional amo' was to enable new-work to be more readily inserted in. the machine. This improved a construction and arrangement of parts not only permits; an additional retracting movement of the 'welt guide when the cam shaft of .the machine is turned backward but has the'further advantage of comprising a less \I I number of parts and a more simple arrange- RThe two brake shoes-of the tension mechament than the constructiondisclosed in ap- 9o plicants prior. application.

The improved construction illustrated in the drawings comprises a locking lever 27, a latch 28, and a pawl 29. The lffiper end of the latch 28 is provided with aproje'ction' which during the normal operation of the I machine in sewing a seam engages a plug. 30, on the lever- 27 and holds the lever in its depressed inoperative position, said position being that indicated in Fig. 4. With: the lever 27 in" this-position the lawral ex: tension 31 of the-lever is below the screw head 26 ofthe clutch box 13 so that the clutch box can be actuated during each cycle of operations of the machine to retract-the .-,welt guide. When, however,'the lever 27 risesto'the positionindicated in Fig. 3, the projection 31 of the lever is in line with the screw head 26 and locks the clutch box against backward movement. The latch 28 isconnected, by a coiled spring 32. The pawl 29 is pivotally mounted on an arm 33 projecting from the hub of the bell crank 24 and rests upon the top of the latch 28, as indicated in Fig. 4. When the cam shaft of the machine is turned backward to. release the tension and retract the welt guide the pawl 29 moves forward and drops down parts remain in this position with the lockmg lever 27 still locked in its depressed position during the continued rotation of the cam shaft so that when the lever 12 is actu- I ated the clutch box 13 is moved backward the welt guide in addition to that which has been imparted te it by the oscillation of the a bell crank 24. When. the machine s again started into operation, the pawl 29 actuates the latch 28 to release the locking lever 18 erative position during the continued op.

eration ofthe machine. I

The nature and scope of the present invention having been indicated and the preferred form of the invention having been specific-ally described, what is claimed is 1. An inseam shoe sewing machine, having, in combination stitch forming devices, a welt guide, mechanism acting normally to retract the welt guide during each cycle of operations of the machine, a device to prevent the retraction of the welt guide, means acting normally to hold said device in mop erative position and means actingw en the machine is started. to render said device operative to prevent the retraction of the welt guide during at least one cycle of operations of the machine.

2. An inseam shoe sewing machine, having, in combination, stitch forming devices, a welt guide, a tension device, mechanism actuated by a reversal in the direction of rotation of the cam shaft of the machine for actuating the tension device to relieve the tension on the thread, connections between said mechanism and the welt guide to retract the welt guide whenthe tension is released, and mechanism for retracting the welt guide during each cycle of operations of the machine in sewing a seam acting when the shaft is turned backwardito impart an additional retracting movement to the welt guide.

3. An inseam shoe sewing machine, having, in combination, stitch forming devices, a welt guide a tension device, mechanism actuated by a, reversal in the direction of rotation of the cam shaft of the machine for actuating, the tension device to remove the tension on the thread, connections between said mechanism and the welt guide to retract the welt guide when the tension isreleased; mechanism actuated by the cam shaft to retract the welt guide during each cycle bf operations of the machine in sewing a seam, acting when the shaft is turned backward to impart an additional retracting movement to the welt guide, a device to prevent the retraction of the welt guide, means inoperative position during the continued operation of the machine and when the shaft of the machine is turned backward.

retraction of the welt guide, and means actu-- ated by the forward rotation of the cam shaft of the machine forrendering the device operative to prevent the retraction of the welt guide during at least one cycle 0 operations of the machine.

5. An inseam shoe sewing machine, having, in combination, stitch forming devices, a welt guide, a tension device, mechanism actuated by a reversal in the direction of r0- tation of the cam shaft of the machine for actuating the tension device to relieve the tension on the thread, connections between said mechanism and the welt guide to re-.

tract the welt guide when the tension is 'released, mechanism for retracting the welt guide during each cycle of operations of' the machine in sewing a seam acting when the shaft is turned backward to impart an additional retracting movement to the welt guide, and means for holdingthe welt guide in advanced position during at least one cycle of operations of the machine.

6. An inseam shoe sewing machine, ha

ing, in combination, stitch forming devices,

a welt guide,a welt guide slide, mechanism including a yielding connection for -retract ing the welt guide slide during each cycle of operations-of the machine vent movement of th e slide by its actuating mechanism, a latch to hold the locking device in inoperative position, a pawl, mechanism actuated bya backward. movement of the cam shaft of the machine to move the pawl into engagement with the latch and actuated by a forward rotation of the cam ANDREW EPPLER.

Witnesses MARGARET L. GiLirAN, Nnrrin D. MCPHAIL.

sewing a seam, a cam actuated locking device to pre-