US2670481A - Shoe press - Google Patents

Description

March 1954 H. GULBRANDSEN 457 3 SHOE PRESS Filed May 24. 1949 3 Sheets-Sheet l fm/enzor Helge Gulb ranaserz' 10 By his Attorney March 1954 H. GULBR-ANDSEN SHOE PRESS 3 Sheets-Sheet 2 Filed May 24, 1949 10 Inventor Helge Gulbrandsen By his Attorney March 1954 H. GULBRANDSEN 2,670,48

SHOE PRESS Filed May 24, 1949 v a Sheets-Sheet :s

Inventor Helge Gu lb/"anasen Bi: his Attorney Patented Mar. 2, 1954 PATENT OFF fC 2'-,670,481 I sfioEPREss- Helge Gi1lbraiidse1i;.-Bever1y, Mass, assignor to Unitd shbe Maehiliery' Corporation; Flmiiigato'ngi-N: Jz a-corporation of New Jersey A plicatitn my-z iiwiasrisl Niresjtsa" m'aii'si for q rel articulated" atii'i" sticc ber 'ih er'c'ofihecting the supportingmlates of both padsfi.ancvrnebms ior movmig the interconnecting their respectite'pivots afadthereby simultaneously adiiilstP-thc angulai positions 0f" thetwo -'-support ing gplates of eachpad relatively to eachother the'same amountordegreer Asherein illustrated? the ni'ovingmeansr preferably: comprises a -screw helig -rom=lofigituclinalqfiovement in thema'chine and threadetf into the "interoonnectingamember; same re being arrhgect tebe rotate'd mahually adjust th'e' supboi'tihg'plates for each pad siit nul taneously about their respective transverse axes an'tl alsii to cause thff'at f6rep'artplates and the curved sharikplates to' p'ivot'relatively to each othraboiltthe pave-ts interconnecting said fore- Ir'i-thisway, th'e'move part ariii'Shazik'blte'S-L v merits requirewofjtlie operator 1 for operating the press, particularly for adjusting' the pads when 7 operati r'ig-succssively upofipa'irs' of shoe'shav ing 'difiereritl'y shaped bottoffi portions are re-'-" More0i/er','the adjustment duefl a m lmu' of "the two pads' for eachpair' of; shoes operated upon insuresthat'the press will operate with maximurh'e'fliciency oflthe qiffereht pairs'of shoes while, on the other handJt'm'ay be operated. sub stanftially as fast as press'es which do not have such'a'd'justment; H v H ln' accorda ce"with another" feature; the invehtiofiprovide's an improved shoe press having a pad for receiving a shoe, a presser foot for pressing' the shoa'gai'nsfith pad," and mean s includ'- in'g a'rackah'd 'piiiioii floractuating saiql pre'sser; foot; said meahs also includifig a handle pivoted a substafitial dis'tahce' rearwardly of the pinion haridle and said 'pi hioh'wherebij when the-handleis swufig forwardly toward the operator, the

presser fo'otwill be mb veddowhwardlfif toward the;

oad; saia iaet-nameameam being also arranged anijsrn to movethe presser foot toward the pad withaforce which is substantially greater than" the force thatwould normally be applied to the closed; w-thereby finsurirign that sufficieut pressure will-be afiplied'to -theshoe withoutundue-exertion on -the part of theoperator.

The presser' foot is also provided with a lastengagingmember'which, in accordance with an-- other feature'of the invention, is adjustable into differeiitlat'eral positions for engaging lasts of differen her, as

its: lateral adjustmefit" relatively thereto? WitHthe above and other objects "andfeatures sizes'or'sha-pes'; theIaSt-enQaging mernem illustrated, being" rotatably 'n'iou'nt edj in the otvf'efid oftliepresser'fcot and arraii'gfl t6 be rotate'd laterally thei'eof 'in'to" d-if fererit operative p ositioiis', the" member" being refifovabii itaixredtnsaid resser 'foot by spring pressed means which holds'the member securely in the presserfoot "but doesn'ot' interfere with" detail with the accompanying drawings and will thereafter be pointed out in the claims.

In the drawings:

Fig. 1 is a perspective view of the shoe press embodying the present invention showing a shoe under pressure on one of the pads;

Fig. 2 is a side elevation of the press with the right-hand pad removed and other portions broken away to show details;

Fig. 3 is a front elevation of the lower portion of the press with portions broken away or shown in section;

Fig. 4 is a plan view of one set of articulated plates which support the pads;

Fig. 5 is a plan view, partly in section, of mechanism for operating one of the presser feet;

Fig. 6 is a fragmentary view of a, portion of the presser foot operating mechanism shown in Fig.

5; and

Fig. 7 is a transverse sectional view taken on the line VII-VII of Fig. 2 showing the shoe under pressure.

The illustrated shoe press comprises a hollow rectangular base or frame It adapted to be mounted on a bench or supporting column and having secured to its rear portion an upstanding casting l2 which projects forwardly and carries two vertical housings I4 and H6 in which are mounted for heightwise reciprocating movement two posts [8 and 28 which form the pressure applying members and carry presser feet for engaging the lasts in the shoes operated upon. As illustrated in Fig. 1, the posts [8 and respectively, are positioned above and directly opposite a pair of pads 22 and 24 mounted side by side in the base Ill and arranged to receive a pair of shoes to which pressure is to be applied, for example, to attach outsoles or half soles to the shoe bottoms or, if desired, to apply sole laying or sole conforming pressure thereto.

The pads 22, 24 are composed of yieldable resilient material such as rubber or a composition thereof and each pad comprises an assembly consisting of a solid block having transverse grooves 26 (Fig. 2) extending partially therethrough from the underside of the block to assist the pad in conforming longitudinally to underlying members which support the pad, these pad assemblies being of the type illustrated and described in my copending application for Letters Patent of the United States, Serial No. 53,467, filed October 8, 1948, now Patent No. 2,611,143, granted September 23, 1952. As illustrated in that application, each pad comprises a lower block 28 (Fig. 7) composed of resilient material, preferably rubber, and provided in its upper surface with a recess 3!! shaped like the periphery of a shoe bottom but being larger than the largest shoe to be operated upon. Removably mounted in the recess 30 of the block 28 is a resilient or yieldable shoe receiving pad 32 preferably of rubber which is shaped similarly to the recess but is slightly smaller so that it may be easily removed and replaced by a different pad. The bad 32 has a central recess 34 which is smaller than the smallest shoe to be operated upon, the recess 34 being defined by an abrupt shoulder at the inner edge of the pressing portion of the pad, thereby concentrating the pressure along the marginal portion of the shoe bottom and minimizing the pressure at its central portion. The Dad 32 is overlaid by a cover 36, which may be composed of rubber or leather or a lamination of both and which may be secured in positionon the. pad in any usual or convenient fastenings. The pads 22 and 24 are identical in construction except that the pad 22 is shaped to receive the right shoe of a pair to be operated upon and the pad 24 is adapted to receive the left shoe.

The means for supporting the foreparts of the pads 22, 22 comprise a pair of fiat rigid plates 38 and 4! (Figs. 2, '3 and 4) which are supported side by side in parallel relation by a transverse shaft 42 secured in the frame if), each plate having a downwardly extending pair of hooks 44 (Figs. 2 and 4) on its bottom surface which engage the shaft 42 and permit lengthwise movement of the plate as well as pivotal movement about the shaft 42. The inner ends of the forepart supporting plates 38, 40 have upwardly projecting hooks 46 thereon which enter recesses provided in the inner walls of the pads 22 and 24 and thus hold the foreparts of the pads on the plates. As illustrated in'Figs. l, 3 and 7, the frame I 0 is provided at opposite sides of the pads with upwardly projecting ribs or flanges 4? which engage the opposite side walls of the lower block 28 of each pad and thus maintain these blocks in proper lateral position on the plates 38 and 40. At their outer or left-hand ends, as viewed in Fig. 2, the forepart plates 38 and 40 are provided with central bosses (Fig. 3) which carry transverse pins 48 and 59 to which are pivotally connected by means of ears a pair of upwardly curved rear or shank- engaging plates 52 and 54 which, as shown in Figs. 2 and 4, are arranged to cover the spaces separating them from the forepart plates 38, 4G and thus provide substantially continuous or unbroken surfaces for supporting the pads 22 and 24 mounted thereon.

The shank- engaging plates 52 and 54 are arranged to fulcrum about a common transverse shaft 56 mounted in the frame and, as shown in Fig. 2, have upper surfaces which substantially conform longitudinally to the curvature of the shank portion of a shoe having a medium or normally arched shank. The plates 52, 54 are provided at their outer ends with downwardly extending cars 58 which retain U-shaped springs 60 arranged to enter elongated slots 6: formed in l the opposite side walls of the pads 22 and 24 and thus hold the pads in position on the shankengaging plates.

The plates 52 and 54 are provided, respectively, at their inner or adjacent sides with downwardly extending parallel arms 62 and 64 (Figs. 2 and 3) through which the transverse shaft 56 passes, the lower ends of these arms having rotatably mounted therein a short transverse shaft 65 which interconnects the arms and, consequently, interconnects the shank plates 52 and 54 so that they will have the same pivotal movement about the shaft 56. The short shaft 65 is provided between the arms 62 and 64 with a horizontal hole extending at right angles therethrough and threaded internally to receive a flanged screw 68 which is rotatably mounted in the frame (0 and 1 has secured to its outer end by a pin 10 a handwheel 12 whereby the screw may be rotated. Hotation of the screw 58 by the handwheel 12 moves the interconnecting shaft 65 forwardly or rearwardly and swings the shank- engaging plates 52 and 54 in unison forwardly or rearwardly about the shaft 56, thereby causing these plates to be adjusted simultaneously by the single handwheel into different angular positions relatively-to the forepart plates 38 and 40 or, in other words, 5' simultaneously adjusting the two supporting a manner, x mpl by cement, dowel pins or 7%; plates of both pads angularly with respect to each angularly by the liandwlieel l'l ab'out the shaft5fi- 5 the forepart plates sli' aml til are permitted to' move longitudinally as Well as to rock-singularly relatively to'tl' ie' ti' ansverse= shaft 4 Z by: reason of theslots in the hooks t ii Inasmucl'i asthe pads of the present shoe press=are adapted to operate: upon bothshoes of a-pa-ir of shoes at the same timertli'e supportingplate or both padsMiami- 23="-'can tlius=tie -adjusted simultaneously by' the single'handwheel T2 ihto' tlie same angular pus-i tions' for operating successively" upon pairs of shoes the or bottorn portions of which are shaped differently *from the-- pair of shoes *previouslyoperatedupon;- Moreover; the arrange ment of the s crew 6 8-threaded tliroug-h theinter connecting-- shaft l 66- insures that when the sup porting plates of both pads have been'adjuste'd" angularlyfor a particular-pair of "shoes; the "pads will *remain in adjusted position duringthem-es sureapply-ingop erati-orroruntil the angular post tions of the-plates are changed by the operatorr The mechanism for pressing" the shoes against the pads 22*and 2't comprises thevei'ticall-yreeiprocating' posts IB 'an'd 26" previously referred to-andoperating *mechamsm --forth'e postsindi vidua-l to each padso' that either membencan be=- operated iIldDBHGITtIY" of" the" other: Since" botl'Fpressure applying mechanisms are identi'cal inconstruction, only one mechanismrieedbe-de= scribed herein: The post 26in-the' housing, it is providedmn its inner" side with: rack teeth Mi thei'lowerend*ofthezpost'theingenlarged andhaw in'g -mourrted$thereon a" last engaging m'embenor ment inan" arcuate" slot" formed aicafrri'er "l8 1 wherebyitican' adjust: itself automatically-to the angle of the portion'ot the'la'st engaged thereby: Tlr'ecarrier'lWisprovidedwith 'an'iipstandihgpin 86 which enters"a-vertical hole, in'thelower end of the post!!! andisreta-"ined therein bya spring: pressed. pinior plunger 82 which engages an annular grooyeiin'the'pin 89, thereby. pl i'mittin horie. zonta'lrotation'of 'theicarrier l8 and presser'fo'ot 7'6 into-different positions for engaging lasts l-of difierenttypes or'sizes: As'illustratedfin' Figs. and the .presser'. foot i6" is engaging, a'.-lasti I; I in a'shoesjwliich' is1reoeiving pressu1'e'.from the- 2B? the cone .of the lastj having: been. out away to form. a fiat hori'z'ontaljsurface'lwhichthe presser foot 16 Engages; W hen operatingpupon. shoes-of "diiierent sizesijor shoes. mounted on .difl-T ferentitypes' of" lasts; for example, various types of metal lasts'or forms sometimes used;when1ap-.- plyingpressure to shoe bottomsqthecarrier 18 may be rotatedllsuf into an oppositeiorxinnerpoe sition ifhecessary to ,positionythe presser. foot to, accommodate these difierent types .01, sizes of I lasts;

Rotatablyjmounted one. a. horizontal; shaft". 85 fastened a set'screw 85in .thehbusingl I BTis' a pinion'tfiwhiclrmeshes withith'e rack "leionthei vertical "post iZBan'dj; integralwith: the pinion,.is1a. gear 88 which" meshes withi an intermediatejvor idler gear 90' rotatably 'mounted' on a1shaft 82 secured bya set screw: 94 t inthef housing, ,i Gfrearwardlyoftheshaft as: Theintermediateigear 90i mesh'eswith a piniorr'etj the hubi 98 of which; is i fastened'bya taper in' I iiiito: ashaft'l Q2iiournaledin' the frame I 2 "rearwardlyjgof theish'afts 81V. and 92 and; consequently; rearwardly" or none t? rotates2 Tiieoppo'siteend's of-"theshaft lM ex tend 'lateral-ly' 'beyond the frame; as viewed Fig: 5, and the right-hand end of the shafthas .aratchet wlieel -l il l secured thereto bra-pin l 062- 92 on which the gear 96 is mounted, is' pawl l lfli having as forwardly extendingz'tail or'liandle [12 m positionto be readily depressed" by the operaton The pawl is normally urgedin a-'clock wise direction; as seenin Fig. 2, by asprir'ig ll4 seated in a boss provided on thehousing' I 6 and i pressing upwardly against the underside ofthe pawl. Rotatablymounted on the opposite ends'of the shaft I92 is a relatively long U'-sh'aped' 1 arm or handle lli which straddles the mecha nism just 'deserihed and is provided-with a-c-ross-'- bar ll8 whereby' it may be graspedby the op orator and swungfor-wardly and rearwardly toward andaway from the operator about the shaft with a single tooth l2 i swung; into its rearward'position', asshown" in Figs. 1 and 2, the roll' engages a high part of" the cam and thus holdsthe plunger-122 11;)- wardly away from the ratchet wheel Hit; this rearward position of the handle being deter'-- mined by a shoulder on the casting or frame !2; When the handle i it is swung forwardly by the operator to operate the post 2 6} the roll" l2'8 rides ofi-the-front portion of the-cam [3211 thereby permitting the spring EZGtb force the single tooth of the plunger i22 into engagement with the ratchet wheel' Gil i andthus rotate the ratchet in a counterclockwise direction, as viewed in Figs. 2 and 6.

This-action rotates the shaft 562 in a coun' terclockwise direction and, through the gearing? 96?- 99; BS -and iiiipreviously described, moves the post 20 downwardly with substantial force to bring the presserfoot it into engagementwith the horizontal surface of the last L, or with any'other type of last used, therebypressing'the shoe against the yielclable padZ i andapplying pressure to the" shoe bottom. The pressure is" maintained'against the shoe by the'pawl' H0; whichrides. over the teeth ofthe ratchet IMT durin'g'the counterclockwise rotation. of the lat'- ter. but engages a tooth of the ratchet atthe end of said rotation, thus preventing reverse movement of theshaft iiizandlocking the post 20 in'pressure applying'position.

After one rotation of the handle I I6 forward-. ly*toward"the operator, he swings it rearwardly again and repeats the operation a many. timesas may be necessary to build up sufficient; pressure againstthe shoe bottom to perform the desired operation whether it be sole .attach'ing, sole leveling or sole laying, the additional'prea.

sure applied by each successive loperationoflitheu handle. I16 being maintainediby. theopaw-lr. H 0.1

axially of the center 84 about which the pinion afis 'Aftr' the desired pressure has been app11'd"'"to ooss and engaging a hole The shape and position of the cam i32 are' such' that, whenthe elongated handle,- H6=-is* one shoe of the pair on the pads, the same operation is performed upon the other shoe on the opposite pad, thereby applying pressure to both shoes of the pair at the same time, the pressure being maintained as long as desired by the pawls H0.

The foregoing arrangement of the pressure applying mechanisms of the press causes these mechanisms to extend some distance rearwardly of the posts 18 and 20 in a substantially horizontal position, as shown in Fig. 2, so that each mechanism may be conveniently located in the forwardly extending upper portions of the frame or casting I2. This prevents creating a bulky mass of relatively heavy mechanism on the front or at one side of the housings l4 and l 6 as would ordinarily have to be done in a press of this type in order to operate the posts l8 and 20 in the proper direction. The use of the intermediate or idler gears 90 between the pinions 95 and the gears 88 causes the posts 18 and 20 to move downwardly in the right direction to apply pressure to the shoes when the handle H6 is pulled forwardly toward the operator, thereby allowing the operator. to apply the pressure in the mostnatural and convenient manner. Moreover, gearing arranged in the manner shown herein produces a substantial mechanical advantage in the mechanism, for example, an advantage of approximately 2 to 1 as herein illustrated, which permits the operator to build up relatively heavy pressure on the shoe without undue exertion, thereby preventing fatigue on the part of the operator even though the press is operated continuously or for long periods at a time. The pressure applying mechanisms move the posts or presser feet downwardly toward the pads with a force which is substantially greater than the force which would normally be applied to the presser feet by handles of the lengths shown herein.

After pressure has been applied to both shoes of the pair for a sufficient period of time to complete the operation being performed, the operator relieves the pressure on the shoes by depressing the elongated tails H2 of the pawls H and releasing them from the ratchet wheels I05. He can then readily move the presser feet 76 upwardly away from the shoes by lifting the posts 18 and 20 manually since the handles H6 will have been returned to their rearward positions after each operation to release the plungers I22.

As illustrated in Fig. '7, the pad 24 will apply to the shoe S a pressure which, by reason of the special construction of the pad, will be concentrated along the marginal portion of the shoe bottom where it is most needed especially when attaching soles or half-soles to shoes. The recess 34 in the pad insures that relatively light pressure will be applied to the central portion of the outsole throughout its forepart and shank portions, thereby imparting a smooth appearance to the bottom surface of the outsole so that the latter will not show impressions of the irregularities which usually exist in the shoe bottom above the outsole, especially in repair work. By reason of the mechanical advantage of the pressure applying mechanism above referred to, the present shoe press is capable of applying as much pressure as may be necessary to carry out the operation being performed on the shoe and it is quick, eflicient and easy to operate. Moreover, because of the simultaneous adjustment of the pads for receiving pairs of shoes having differently shaped bottom or shank portions, the press is faster to operate than other types of presses, particularly when operating successively upon different pairs of shoes having bottom portions which vary considerably in shape as is quite often the case in repair work.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. A shoe press having, in combination, yieldable pads for operating upon shoes to which pressure is to be applied, means for pressing the shoes against said pads, a separate plate for each pad for supporting the forepart thereof, a member articulated with each plate for supporting the rear portion of each pad, and single means for relatively adjusting said plates and articulated members to adapt the pads for operating successively upon shoes having differently shaped bottom portions.

2. A shoe press having, in combination, a pair of yieldable pads for receiving a pair of shoes to which pressure is to be applied, means individual to each pad for pressing the shoe thereon, a rigid plate for each pad for supporting the forepart thereof, a member pivoted to each plate for supporting the rear portion of each pad, and means for simultaneously adjusting said pivoted members relatively to their respective plates to position the pads for operating successively upon different pairs of shoes having differently shaped rear portions.

3. A shoe press having, in combination, a pair of yieldable pads for receiving a pair of shoes to which pressure is to be applied, means individual to each pad for pressing the shoe thereon, a pivoted plate for each pad for supporting the forepart of each pad, a member pivoted to each plate for supporting the rear portion of each pad, and manually operated means for relatively adjusting said plates and pivoted members simultaneously to adapt the pads for operating upon pairs of shoes having differently shaped shank portions.

4. A shoe press having, in combination, a pair of yieldable pads for receiving a pair of shoes to which pressure is to be applied, means opposite each pad for pressing the shoe thereon, a flat plate associated with each pad for supporting the forepart thereof, a, curved member pivoted to each plate for supporting the shank-engaging portion of each pad, and single means for simultaneously adjusting said curved members relatively to their respective plates to position the shank-engaging portions of the pads for operating successively upon pairs of shoes having differently shaped shank portions.

5. A shoe press having, in combination, a plurality of resilient pads for receiving shoes to which pressure is to be applied, a presser foot opposite each pad for pressing the shoe thereon, a flat rigid plate for each pad for supporting the forepart thereof, a curved plate pivotally connected to each fiat plate for supporting the shank-engaging portion of each pad, means interconnecting said curved plates, and means coacting with said interconecting means for simultaneously adjusting said curved plates relatively to their respective flat plates to change the angular positions of said flat and curved plates relatively to each other and thereby adapt the pads for receiving shoes having shank portions shaped different from the shoes previously operated upon.

6. A shoe press having, in combination, a pair of yieldable pads having surfaces thereon for receiving a pair of shoes to which pressure is to be be applied, means individual to each pad for pressing the shoe thereon, flat rigid plates for supporting the foreparts of said pads, said plates being arranged for lengthwise and pivotal movement about a single transverse axis, curved plates pivotally connected to the fiat plates for supporting the shank-engaging portions of the pads, said curved 'plates being arranged to pivot about a single transverse axis, and means common to the curved plates for adjusting said curved plates and flat plates relatively to each other to change their relative angular positions about their respective axes and thereby simultaneously adapt the surfaces of the pads for receiving pairs of shoes having diiferently shaped shank portions.

7. A shoe press having, in combination, a pair of yieldable pads having resilient surfaces there- 1 on for applying pressure to a pair of shoes, a presser foot for each pad for pressing the shoe thereon, means individual to each presser foot for operating the same, fiat plates for supporting the foreparts of the pads, said plates being arranged for lengthwise and pivotal movement about a common transverse axis, curved plates articulated with said flat plates for supporting the shank-engaging portions of the pads, said curved plates being also arranged for pivotal movement about a common transverse axis, means interconnecting said curved plates, and single manually-operated means cooperatin with said interconnecting means for swinging said curved plates simultaneously about their axis thereby to swing the flat plates about their axis and change the contours of said resilient surfaces to adapt them for receiving pairs of shoes having difierently shaped bottom portions.

8. A shoe press having, in combination, a pair of resilient pads having surfaces thereon for receiving a pair of shoes to which pressure is to be applied, a presser foot for each pad for pressing the shoe thereon, manually-operated means for operating said presser feet, said means automatically locking the presser feet in operative position, flat plates for supporting the foreparts of the pads, said plates being arranged for angular adjustment about a common transverse axis, curved plates pivoted to said fiat plates for supporting the shank-engaging portions of the pads. said curved plates being likewise angularly adjustable about a separate transverse axis common to both plates, a transverse shaft interconnecting said curved plates, a screw threaded at right angles through said shaft, and operatorcontrolled means for rotating said screw simultaneously to adjustsaid curved plates and flat plates angularly about their respective axes and thereby vary the surfaces of the pads to adapt them for successively receiving pairs of shoes having differently shaped bottom portions, said rotating means acting also to maintain said plates in adjusted position.

9. A shoe press having, in combination, a pad for receiving a shoe to which pressure is to be applied, a presser foot above said pad for pressing the shoe against the pad, said presser foot comprising a post movable heightwise toward and away from the pad, a last-engaging member secured to the lower end of said post provided with an annular groove, said member being rotatable laterally of the post into a plurality of different positions lengthwise of the pad to adapt it for engaging lasts of different types or sizes, and means engaging said annular groove for removably securing said member to the lower end of said post while permitting said lateral rotation.

0. A shoe press having, in combination, a yieldabl pad for receiving a shoe to which pressure is to be applied, a presser foot located above the pad for pressing the shoe against said pad, said presser foot comprising a post movable heightwise toward and away from the pad, a lastengaging member carried by the lower end of said post, said member being arranged for limited rotary movement heightwise of the pad to adapt itself automatically to the angle of the portion of th last engaged thereby, said member being also rotatable laterally of the post to position it in different positions lengthwise of the pad for engaging lasts of different sizes, and spring-pressed means for removably retaining said member in the lower end of said post Without interfering with its rotary movement.

11. A shoe press having, in combination, a pad for receiving a shoe to which pressure is to be applied, a presser foot for pressing the shoe against th pad, a vertical rack on said presser foot, a first pinion meshing with the rack, a gear integral with said pinion, a second gear mounted on a fixed shaft and meshing with said first gear, a second pinion meshing with the second gear, an operating handle mounted on th axis of said second pinion to swing in a vertical plane toward and from an operator in front of the pad, a ratchet wheel mounted on the same axis, a spring pressed plunger mounted in the handle to engage said ratchet wheel, a fixed cam acting directly on said plunger to disengage it from the ratchet wheel when the handle is swung upward- 1y beyond a predetermined position, and a manually releasable retaining pawl mounted on the shaft of said second gear and engaging the ratchet wheel to maintain the shoe under pressure.

HELGE GULBRANDSEN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 704,227 Witte July 8, 1902 1,212,658 Marx et a1. Jan. 16, 1917 1,460,433 Neal July 3, 1923 1,461,785 Pope July 7, 1923 1,514,606 Elliott Nov. 11, 1924 1,641,245 Agobian Sept. 6, 1927 1,727,519 Peterson Sept. 10, 1929 2,083,777 Finn June 15, 1937 2,360,083 Suerken Oct. 10, 1944 FOREIGN PATENTS Number Country Date 383,400 Germany Oct. 17, 1923 11,081 Netherlands May 15, 1924

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