US1755246A - Lasting jack - Google Patents

Description

April 22, A1930. l H. G; ELLIS 1,755,246

LASTING JACK Filed March '7, 1929 patented Apr.ir22, A

P-MM carical:

HOWARD e. "ELLISQ on WALTHAM, MASSACHUSETTS, nssiaivon, B1( Masiva ASSIGN- -.MENmsmo Hoon `Rumania coivnrAIvY.Inca.orwarna'rowii7 MASSACHUSETTS, A

-.-coRPonA'rIo1v or DELAWARE.: r Y J- LASTING JACK c replaced another last.v

, Appiicatidn alga' March 'This invention relates to improvements in lasting jacks and has for itsobject Vto'provide a jack upon which a last can be quickly and frmlysecured and vwhich can be easily i andquickly manipulated by lthe operator to. occupy "the v"different positions necessary in order thata shoey under construction thereon may beoperatedupon in a convenient manner and with `a minimum amount -of `effort from 'the operator;

Another abject' ofthe invanion is fo pro-- videv a Vjackwi'tha locking mechanism for a lastVv that is entirelyl :automatic inl its action both in' locking the last to the` last holder and infinally releasing thelasttso that the latter maybe removed from' the holder and -The invention consists in a lasting jack orl holder fora last' as set forth the following specification and particularly aspointedout in'theclain'is.l n A* 'Referring to the drawings: Y x Figure 1 isr a sideA elevation vof a vlasting jack embodying myk invention, portions of the jack and last being broken away and illustrated insectionandlthe last holder and last l in any of-these Vpositions by means of aloclbeing located in theirlowermost positions.

Vfflig. V2 is a viewsimilar to Fig.1but illustratingthe lastholder and last in their upp'vermost:'positions and portions yof the lastVY and' bracket. being broken away to save spacev in the drawings.

several?l views ofthe drawings. Y

i s Inthe'drawings, 6"is abracket having a 46 portion 7 which is adapted to be Secured to asuitable-support preferably amovable conveyor Y mechanism.` TheV bracket- 6 "embodies therein an arm 8, the outer end vportion .of

i .which is 'dividedrto' form furcations 9v b'etweenfwhich.ar/.connecting member 10 [is mounted upon a pivotalpin 11 which consti-j tutes ka horizontal axis and which 1's`,1'in turn,

mountedinthefurcations9. l .l l The ,col 'necting.member 10 isslotted at Y12 to receive' ar'at'chet'member 13 provided withl aiplurality ofteeth*`14 between `which are 192e. 'sferiai No; 345,030. v

13 is rigidly Secured in any suitable manner -V-shaped' notches 15. The ratchet member i to the connecting member 10 and in effect forms'a part of said member, it being evident that if it fis soudesired, the ratchet member may form an integral part ofthe connecting member l10. The teeth 14 and the notches 15 arepositioned concentric tothe axis of the pivotal pin 11'and yare engaged by a pin l16 which is slidably mounted in `a sleeve'l positioned within an opening 18 provided Vin the arm 8. vThe pin 16'is provided withxa as,Y

v-Shaped and portion 19 which ish'eldA in 'yielding' engagement withv the teeth 14'`and notches 15 of the ratchet member 13 byal spring 20 which surrounds a shouldered portion v21 offsaidfpin,v the tension upon the v'spring being varied by manipulating a plug` 22 which has Screw-threaded engagement withi'thersleevejlY.` `f

lVhen the connecting' member 10 -is located f in any -of-'the positions which permit the spring pin 16 to'spring intov the notchesfl',

the V-Shaped extremityl 19 of the'pin 'will engage" the bottom' of vthe V-shaped notches and thev connecting member. may be lockeding slide 23 which is'slidably mounted vupon the under side of .the furcations 9 and is adapted to be moved into and out of engage-y ment with the *teeth 14g.Y 5

`Rotata'bly mounted upon the connecting member 10 is a holder 241;v fora `las`t`25, ther latter embodying 'therein' aA basel portion 2K6 having an extension 27 formed integual therewith? which proj ectsA from saidl base portion through.`r the connecting member "10'v and through a recess .'28 provided insaid connect- 'ing'memben and a spring 29 is locat'ed'vvithin therecessf28 and surrounds the extension'. 27, being heldV under compression within said re- Y cess by meansof nuts 30 which have screw- 'threaded engagement with the extension 27.

A friction 'washer 31 is interposed between the surfaces of the base portion 26 and connecting member 10 and the ease'withfwhich the last `holder 24.1nay" be rotated upon the {connect-1` f ing member-:10 isincreased or diminished by increasing or diminishingftheftension upon the spring 29 by manipulating the nuts 30.

Also formed integral With the base portion Extending entirely through the last holder 24 upon Vthe longitudinal median Aline thereofr is a bore 34 in Which a bolt 35 is slidably mounted. The bolt 35 embodies therein a portion 36 and a portion 37, the latter having screw-threaded engagement with the portion 36 at 38. .A spring 39 surrounds the portion 37 andone endjof said spring is seated against a shoulder 40 formed upon the bore 34, While theother end of saidspring is seated against a head portion 4l formed at the outer extremity of the portion 37. A slot 42 is formed in the opposite end of the bolt portion 36 from that lto Which theportion is secured for the reception of .a .last gripping orengaging member 43 which is pivotally mounted upon a sleeve y4.4 'in turn mounted upona lpin45` Y Whiehis located adjacent the outer extremity of the .last pin 352. f

The gripping member 43 has a cam .slot 46 formed therein through which aV pin 47 -Y mounted in theportion36 of the bolt 35 eX- tends. The edge of the slot 46 forms a cam surface anda longitudinal movement of the bolt 35 within the bore34 -Willcause .the gripping member 43't0 be rocked laterally `of the last V-pin 32 Within the slot 42 and through a slot 48 provided Vin the lastpin 32 in alignment with the zslot 42 of thebolt. The action Ofthesprinfg 39 is suchthat the bolt '35 willv be moved Within the last holder 24 in a manner to .roekthe gripping member v43 to 'force an edge portion 49 thereof into enga, ement`V With-the last 25 as illustrated in Fig.V 1,'.fat which time a portion of the gripping .member 43 will protrude outwardly beyond the Vperiphery of the last pin 32 in a `manner to prevent Athe last 2,5.froni being/.removed .from said ltst.pir1.V a

A. stop screw 501ismountedin the arm 8 of the lora'elrni .and when thelast holder is l0- oated .fin its .uppermost-position,rf-the outer :extremityofthle head lportion 41 ofthe portion 37fof the bolt 35 Wilflrengage :the head portion of said screw causing the bolt toY be moved Y longitudinally Within thelast holder ,24.and

moving the last gripping member .43 fromthe position illustrated in Fig. l to the position illustrated .in Eig. .2, at which time YthelaSt 25 may-be removed from the .last pin .'A'spring aetuated ldowelpin 51 :isfmounted in the 'base portion. 26 of the last. lholder 24 and projects therefrom .into an opening l5.2

Y providedftherefor in 'the llast 25, thereby pre the"lastpin-32. Y

Venti-ngsaid last from :being rotated upon the head-,portion 41 of the `boltl 34isinfcontacti with the head of the screw 50, the screw 39 is under compression and the bolt 35 has been moved longitudinally .within fthe ilast holder 24 inV a -manner to move a'the last gripping member 43 into'a uposition Where-itis :entirely Iconfined Withinthe periphery ofthe last pin 32, in which position the last 25 may be inserted 'uponthedast pin or removed therefrom Withoutbeing obstructedby lastgrippng member.

Afterthe last 25 has been mounted'npenY the last pin 32 all that is neeessa'ry toflockfsaid lastto said pin is to rock the lastholder124. connecting member ll0 uponthe axis, l1 of oonnectin membenandas soon asthe Y Y 4l ofthe bolt-.3 5 is moved out ofengagement with the .head o'fthescrew 50, thespring 339 will act to move the `loolt35 in armanner force the last'gripping membervf43fromthe position illustrated in Fig. 2 tothe pos'ition'fil lustrated in Fig. l, .at Whiehftinne tlielastviill be firmly secured .upon the'las't holder;

l. Alast-holder @for ajack havijng,in oom,- bination, a last pin upon alastinayhe positioned, -a last gripping .metri-her Ypivotailily attached =to said pin, and al bolt operatively Connected .to .said .,lastg'ipp'ing .member :and

adapted to move 'the sameinto and .ontatiengagement with Aa last ,mounted upon .the le-ast positioned, aflastgripping member,.pliVotallly attached .to said pin, anda holt ly.'ield i'nfggly" mounted ion said last .operatively connected to said Elast giippingmemberand adaptedy to ,move the same'into. and outo'fengagement with ra last mountedirpontheflast pin. f

l 3. Y A last-.holder .for a jack-lraving,1 in nonibinatiorn a Vlast, pin arpon .which-i3 ltmaywhe positioned, xa lastgrippingrmemherrpiuetallly, attached-tto :said pin and 'adaptedfrto 2 bereimi 4 edupon the pin is prevented'frombeing retached to said bracket, a last holderrotatably movedtherefrom.4

f 5. A last holder Yfor a jack'having, in combination, a last pin upon which a last may be positioned, a lastgrippingmember pivotally attached to said pin and providedwitha cam slot therein,a bolt yieldingly mounted in said last pin, and a pin mounted in said bolt and extending through the slot of said gripping member, the latter being moved into Vand out of interlocking relation With a last mounted upon the last pin by the movement of the bolt Within said last pin.

6. Afjack for a last having, jnvcombnation, y f

a bracket, a connect/ing member pivotally atmounted upon said connecting'member,a last gripping Vmember pivotally', mounted upon said last holder and adapted to engage a last .positioned upon the vholder and lock the last thereto, and abolt operatively connected to said last gripping member, the latter being actuatedto release the last by the contact` of said bolt with the bracket when the lconnecting member-is moved toa predetermined position,

Y 7. jack for a last having, in combination, a bracket, a connecting member pivotally attached to said bracket, a last holder rotatably' Y mounted upon said connecting member and embodying therein a last pin, a last gripping member pivotally attached to said1pin and provided'with a cam slot therein, said gripping member being adapted to engagea lastpositioned upon the holder andy lock the last thereto, a bolt yieldingly ymounted in said last holder, and means projecting from said bolt into Vsaid slot vand operatively connecting the bolt to the gripping member, the latter being actuated to release the last by the contact of saidbolt With the bracket when the connectn is moved to a predetermined po'- ing member sition. v

In testimony whereof Ivhave hereunto set my hand.

HOWARD G. ELLIS.

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