US1828640A - Collapsible shoe last - Google Patents

Description

Oct. 20, 1931. A. w. BENNETT COLLAPSIBLE SHOE LAST Filed April 4, 1929 1 ks y a. r

- sh w t ut' mg 'it e to-f e e T {In the manufacture of shoesfrom 0. 6 piece Patented 0a. 20, 19311 f This 'inventihn ielates bglats upon wh ch:

s'hbes are ihaniifaetured and i more fiaTtiCH- l'zti ly concei neqilfw'ith al lsectigngil 1215 2 haying a section lock joint 'effectiye to hold the last sectione fixedin their 'fllfllyextendeiij shoe making position butbreakgthl'ej f te deg crease the overall lengthjofthe lafst 'arnd'per f Init the remkjvzfl of the last fi'bnii thefinished last manyfshoes are "d amztge'dby the for'cie. 4 ble ulling "of a, "solid one-piece'lajstf from I I the finishedshoeatthe end 0f the ma-n ifac "'t'u rin'g cycle, and the last bf the present ill- 1 vention, is especially advantageous, in that the laslt'is fern' 'ediintwosecti'ons-hgu ingeenf nection at the forward endfo'f 'the' heel sec tion; t'hese secti ons being j ointed fer length ldckeddistention tel-the assembly manufacture of "the shoe thereon, the section I ldckjointbein'g thereaftei' 'brakableEindthef sections egoperating. therewith to} permit movement ofthe heel end f th 1 i11PW 7 1y andff wziiidly of the shoe in the normal? pl l'llingdirectionbf the heel end f'the last! tofleei'ease theoverall'length of the la'stin 3 0" the shoe si n d'pez 'mit thehedily extractien Of the broken1last Seqtiohg-yvith0fith damaging'strain On the hee'parts;

fm ihie z Theiinvention consists 1 the constriietion,

arrangenientf'and co'mbinatibn efpirts. as

' hereinafter m0re" fii11y pointed iout and' clailnedy'ahdi-in a; preferable form; is illustrate ed "in the accompanying diflawings' f i'IningI-Q,

' I tacks. i,

part hereof, and in which:

;;Fig1'1re-;1 is a longitudinal Sectional View gccofdanee with that k 40 of a. last const ucted in present inventlon. va 1 Figure 2 s atransversehorizontal-section thi qu gh the/ 121st section lock joint; taken on Figure 3 is al (1 ta ll gperspective View (if the;

Inb ti'se plate; ofia dove tailed section Icdnnecti o'n, in: theinverted"po'sition'of Figurel, this I .P -Qfi Q fi-fl t FigUreA i's'a' simlla'r perspective View of p'ltte being-applied to therem-fend,gflf theiitfere 'eoLneP I iaIJE $3632; LAST 192:9; Sakai?fiQtzQisisl i Y, theflcnbpei f 'ihg wed ifi ifie qf 'i at pt d ve mileasj ction connect zippliedit h": heel' s eetio'n of the last. 2

: Figure 51s a detailed Sp detache d with sp'liin'giomittedte discl 'sejthe inonntingef the sprin tensioning abutment m ykin' p fre y re of et'alt' i i -t l 'y qu'g i.bb us 'y'they iaybemad frQmwood'Tin' ageopd nb'e with presemgda tion; is Cut hack a ti3p1 eviding 5;]; SspaceA' in last fs ectibn s hbwn'inEigure 1 prbvidingjfon diagonally fiip'vizaifl and forward movement; f f

of theheelisection toward the fb'relpa r't sc, tion when the. connection. leckjis} b fQken, and; the heel "section moved gl plwa rdly an for; wardlyl tow ard theftOe to flee tease the dvefgll length of the lastfer extraetiori fii'bmthe sh'oefl of thefo r'epart end heehsectiens have down Wafdlyflndrearwerdlyincline'df faiee's. 5Whieh Y but in t e'fu y-' d,lbcl ,ed imita ing;

p' tiin 6 the la t mi ,,P efemhlmg es a ce's ay Q IIE Wi hTcp i itil gfi p1 shdulde'rs (i engagingandpdsitioning the;Jppt-j the 1 Vertizl s0 1 ,plates, 55

.The lower ptoiftionsfe'f'theibnttihgeridificeel;

cap

the rear end of the fore-part around and outlining the edge of thesocket 8 is shouldered to provide an abutment ledge 12 eX- tending around and edging the socket With the face of the ledge inclined and extending in parallelto the inclines or bevels 9 and 10.

' That ortion of the fore-part 1 adjacent to the le ge '12 isalso' an overhang, the sliding motion 'ofthe heel part 2" being limited by these overhangs.

The heel section 2 is: providedwith the usual jack'pin socket with the lower end of the socket, in the distended positioniiof'the sections in Figure l, alined 'With'the lower end of recess 8 and counter bore'd inalinementtherewith to provide a longitudinal slot f4 exte1iding throughits-inclined'facev5 to rece'ive tli'e" link hereinafter described. This slotis traversed adj acent to its rear end by a bore (Figure 2) for a link anchoring pin. {Seated with its edges'resting on the abut mentledge12'of the forespa rt section is what maybe termed the mortise plateiof'a wedgingdove-tailedf connection for the two lastsections, this plate being detailed in Figure 1 3 and generically designated 16.

Thisf mortise plate '16 i's formed with an I vupper inclined portion 1T7 whose inclination conforms the inclinediportion 9 of the ledge lflgan'd with/a lower inclined portion ISxofa different, angularity. conforming to Y 1 the inclinedjportion 10 of the ledge 12 This plate, laterally; its tapered outwardly from 7 its up er edge downwardly'to its junction e inclinedgportion 18 inco nformation with itheusuail; cross sectional contour of a last at thisrpoin't and the inclined portion 18 h a've side marginal edges l'9'of reduced thickness and edged finwardly at both sides cflatribsQO, extending from top to bottom the "relatively inclined portions 17]and 1'8,

7 I extend in maximum spaced parallel relation. 7 From the point of thisangular junction, these ,confrontin edges converge wedgingly, preferab1y,'as "s own in Figure 3, intwo-s'teps 22 lam-11323 of successively increasing; convergence with a fstop shoulder 24 at their j unction'. Between these confronting edges the plate: is

pierced longitudinallyby an'elongated slot 25;. At the outer edges ofthe ribs the plate is formed with tapered bores 26 partly cutting the 'outer'sidej edges "of the ribs 20 to 1e 7 ceivef and countersink the heads of screws by:

means of which the' plat'e 16 is secured to the led e'12.'

- through is hann ll d to p ovide a abutment ledge 27 jedging-saidchanne'l and form-, a seat the outerejdges' of a dove-tails ing tenon wedge plate shown in detail in taperedjside edges 22 and 23 of the mortise plate ribs wedgingly to interfit therebetween, these tapersBO and 31 being joined by shoulders 32 designed to abut the shoulders 24 of themortise plate ribs 20 when the tenon 29 is wedgingly seated between the tapered portiorisf22-F23 of these ribs. The tenon plate 28 at theopposite sides of its tenon 29v is pro-' vided with series of holes ?33. =drilled-therethrough to receive screws'3 l forattaching the sides of the plate to the ledge 27 of the.

heel section.. The plate 28 is also pierced centrally and longitudinally of the tenon'jby an elongated slot 35 alining withthe slot 114 of the heel section 2, in the attached position of the plate and with the slot ofthe mortise plate andthesocketS of the'fore-part section 1.

A link in the form. of afiat .bar 36, shown in detail in Figure 5, extends through the .alined-slots 25, of the mortise and tenon. plates 20, 28, its rear end projecting into the 'slot 15L of the heel section and having a:

bore 37 through which extends a pin '38 driven througha transverse bore in the heel section, this pin being heldin said here by any suitable means after'insertion, such for example asup s'ettingl its ends. ,The :rear end of the link is therefore anchored to the'heel section by said pin. V I

The forward end of the link bar 36 e2;-

. tends forwardlythrough and beyond the men; tise plate slot 25fora substantial distance.

This forwardly projecting portion is formed with alongitudinal slot terminating short of the forward end thejbar and having an entrance lateral extension 39rat its forward end of at least coincident width. At itslforward end itis traversed by afixedicross pin 40, (the.

projecting endsof Which constitute a-spring abutment. A sliding abutmentjpin 41 is. formed- With an intermediate diameter -sub--.

stantially coincidentwith ,the width of slot 3'8 and a length permitting the insertion of this portion through the entrance lateral 39 into slot 38. The ends of pin 41 project laterally'from the opposite side faces of the bar link 36 and are of increased diameter to rcq p p y y tain the pin against transverse displacement 'gh'eiinclined portion 5 ofthe front-face of the heel sectionedging the slot 14 ;there-' from the slot 38, and provide late-rally offset encircling: thei-bar liiik: 66 betweeir the 1 fiizel section, is used and by upward and forward pull thereon, the dove-tailing tenon plate is nseam and movable .pin abutmentsittl and l vikThe tension of Psprmg 42- acting against the fixed, abi tnientsiw is transmitted by the.

bar zlink :36 to the anchoring pin "the heel section*a nd: urges the inclinedjface 0f said heeli section againstthe' corresponding ly inclinedv abutting face of the fore-part sec-f tion.- 'In the" distended operatingposition of the last section's shown fin Figure t'he spring exerts its'ften'sion to hold the heel sections locked together In thisdistended position of the "sections, the wedging tenon 35 of thetenon plate is seated in the wedging groove of the mortise plate between successive wedging tapers 22-23 and is wedged downwardly therebetween. The tension of the coiled springv42 in this position, because of the inclined face of the mortise plate against which its abutment pin tl is held, holds the edge of the bar link tensio-ned against themortise and tenon plates at the ends of their slots in a direction to increase the wedging interlock of said platesin the. distended operative position of the last sections shown in Figure l.

To break this wedging' interlock and re- 7 duce the overall length of the last sections for removalof the last from a shoe, a" suitable tool having a pin insertible in the jack pin hole 13 0f the heel section togripsaid slid upwardly (or in the inverted position of the last in Figure 1, downwardly) and forwardly over the forwardly inclined portion 1 of the wedging' groove between'the ribs 20 of the mortiseplate', with the tension of the spring 42 holding the tenon in the groove.

It is to benoted'that with the wedging their joint maintaining spring link will be assembled and the tenon plate'first secured to the heel section of the last, after which the mortise plate is attached to the fore-part section, the tenon 29 being held in the groove of the mortise plate between the ribs 20 by the tension of the coiled spring 42 of-the connecting link bar. Itwi1l be evident also that in the reduction of the over all length of theslastsections the pulling of the last from afshoe made thereon, the heel section of the last may be held stationary,- as on a the 'shoem'oved: relatively-thereto. 5 v 1 tion, is E intended as 1 illustrative rather; than restrictive thereof and structural var ation and modification'are contemplated 1n;"con:

" ak pi ndlzthe'Zforepart- Jofthe;last an ,1

i 'The:specific:constructionsidisclosedriwhile representing apreferred form OfthG IIIVGII- I I sonance with thespirit;.ofthe inventionl and i V the'scope of; the appended claims}.

WVhatLI claim, therefore, .and: desire Ito. "secure byLettersPatntis;-

p A sectional shoe lastacomprising ai-forev a part sectionand a heel part section divided along: a dine-adjacent the frontendof tlfe heel :portion of the last body, :-.the :rear face v .r ofthe fore part section-having successive up} I wardly, and -forwardlyfinclined bevel's from its sole edge'upwardly joined at an angle intermediate {thetop and sole line of thefore' under c'uttin-gthe top face. of said section with the uppersection of face bevell having a substantially increased component of-forward; inclinatiom-the abutting fronttfacev of theflheel section having its upper'po'rtion cut fore [part section from theangular junction of its face-bevels upwardly and having Jthe lower: portion of.v its face beveled in correpidence with the lower beveled face of'the fore part section; and means'joining and io'ldingthe beveledlower face -of the heel section slidingly interlocked with the beveled lower and uppenface of the forei'partseetion for bodily sliding movement of the heel. part sectionI'thereon-along theline of said. bevels from a normal operative fu11- last length position of the sections with their'sole faces alinedto an'upwardly and forwardly moved position of the heel section with its flower beveled face engaging the upper portion of part: section; and terminating ;be1ow-.; nd

' back from the confrontingupper face of the a the confronting; beveled faceof the fore part i sectiomsaid means joining the sections'being formed to interlock the sections i rigidly =to-- gether-i in said; normal operative run lengthrpositionvof the sections.

2. A sectional shoe last comprising aj'fore part section and aheel part section divided along a line adjacent the front end of the heel portion of the lastbody, therea-r face-of theqfore-ipart section having 'successiv'e up! warfdly andforward ly inclined bevel'ss-from j- Y its sole'edge upwardlyjoined' fat an' fan'gle ,7 ,7 intermediate the top and soleline' of the fore part section and terminating below and a under cutting the top face of said section? withth'e upper section ofrface bevel having v substantial yincreased component of for' 1 i ward inqlination', theabuttin'g frontsfaceeof the heel section having itsflupper' portion. cut" back from theconfrontingupper face of the fore part ,sectionfromthe angular,junctiona of its face bevels upwardly and, having the lower portion of itsface :beveled; in .cor're spondence withthe lower; beveled-faceof the beveledportion of the fore part mortise plate and its sole face valined with that of the fore fore part section, a mortise "plate shaped to;

Z fit and secured to the upper and lower beveled hnezportions of the fore part section, a tenon plate shaped to fit and secured to the lower bevelled face of the heel section, and means holding said mortise and tenon plates in engagement for bodily sliding movement of theftenonplate.and heel section from a normal shoe holdingffull: last length position with "its tenon plate, seating on the lower part sectioinupwardly and forwardly over the mortiseplate of the fore part vsection to neduce the over all length of the last sections and to withdraw the heel section; of the last from within the heel end of the shoe in an upward-and forward direction clearingthe heel end of the shoe, said mortise and tenon plates being formed wedgingly to interlock in :said normal full last length position of mentinto contact with said abutable means.

4. A shoe last comprising a fore-part,- a

' Separate heel part, a connecting link extendingfrorn the fore-part to the heel part said link having a slot in proximity to one end, abutment means movably occupying theslot, yieldable means carried by the link acting on the abutment means to urge it toward one end of the slot, abutablemeans carried by one ,of the sections for engagement by the abutment means, and means to pivotally connect the other end of the link with the other section.

,5. A-shoelast comprising a fore-part, a heel part, a connecting-link extending from the fore-part to the heel part, meansfor pivotally connecting one end of the link to .one of said partslto enablea relative sliding and swinging-motion ofsaid part in reference to part and? reaching into the tore-part, amen ber fixedonthe-fore-part through which the link extends, yieldableirmeans carried by the link bearing against and upon said member during .motions of the heel lpart relatively, tothe fore-part, andspaced overe hangs projecting from the fore-part between which a port-ionofthe heel part is fittedsserv-v ing to limit the motions of the heel part in opposite directions; 7 1 7 r ALBERT BENNETT.

theother part, yieldable means on the other v v end of the link, and means on said other :part alongwhich the yieldable means has sliding and swinging motion. I

6; A shoe last comprising a fore-part, a separate heel pal-rt, connector on one of said parts, means on the other. part with which the connector is slidably joined, said means including portions of different angula'rity, and means yield-ably connecting the tore-part to the heel part, compensating for the difrferent motions of one part relatively to the I other while said connector traverses said portions' of difierentangularity.

7. YA shoe-last comprising a heel part, a separate tore-part,- a link pivotedon the heel i-io lit

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