US1842366A

US1842366A - Shaving machine

Info

Publication number: US1842366A
Application number: US425810A
Authority: US
Inventors: Wayland Frank
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-02-04
Filing date: 1930-02-04
Publication date: 1932-01-19
Anticipated expiration: 1949-01-19

Description

F. WAYLAND sHAvING MACHINE l Filed Feb. 4,1930

Jan. 19, 1932.

Patented Jaa 19, 1932 FRANK wanaivngorsALEMQMAssAcHUsETrs sHAvING' MACHINE `Aapplivation filed February 4, i930.. `serial No. emissio.` n

` :This invention relates to leather shaving machines of the kind employedin tanneries and other leather Working establishments and relates more particularly to .improvements in the feeding mechanism of such a machine.

Inmy copending application, Serial No. 384,635,iiled August), 1929, I have disclosed oneembodim-ent of feeding means in `Which a support, carryinga rigid feed roll, 'is moveration I contemplate the employment 'of a `30 l ever, in order to control and adjust the amount ablebodily toward and from the cutter by means Which applies the actuating force substantially in the plane of the movement of the f-eed roll, and Which is adapted to lock the support unyieldingly in adjusted position;v

While theaforesaid machine is highlyeffective for its intended purpose, I have found for certain Work, for example, for.: shaving calf skins Where the longitudinal central portion or back line-'issubstantially thicker than thesides,*that it is desirable to provide for a slight but `accurately limited yielding ofthe bed or feed roll at a'ipoint or `points inter-- mediate its ends to accommodate such greater thickness, it being understood that With such an arrangement the skin is not reduced to uniform thickness throughout, but varies from center to edge. i 'i To provide for such desirable mode of opfeed roll which, inap accordance With `one em-f bodiment,`may beta1-solid piece of steelor other' suitable material but of such small diameter relative to its length'that it will spring away from the cutter When` the skin being shaved is l1 abnormally thick at places. HOW- of suchspring of the roll,I prefer to provide one orInore adjustableabutments for the roll, such` abutments being provided, if desired, With anti-friction elements for engagement With the roll. Normally,abut a single central;

ly disposed abutmentis necessary,but I con`` template the provision of a plurality of abut ments spaced longitudinallyfof the roll and i independentlyadjustable so as to permit re'- t lief or application ofthe`pressureexertedby thelfeed lioll at anyY of such points intifthe length oftheroll.

1As an arrangement alternative t0 thelsolid feed roll if above described, I` may =provide a `hard surfaced rigid andin disposed in cooperative relation to the cutter.

`of Fig, l, butshowing .rightrhand `side of the machine in end elevaf` roll a substantially frigid unyielding mounted `upon this sheathing a plurality of 55 eformable rings of steel, brass, i or the like, each preferably of relatively small axial extent and spaced slightly fromone another so as to permit each 4 ring to movelindependently of the others. 60 With this construction the effective surface of the roll is constitutedby the hard surfaced rings Which individually maintain theirn0r maljcircular curvature and Whichare thus capable of cooperation With the cutter' inthe same Way as the usual steelroll, but Which, relative to each other, may yield bodily to compensate for substantial differences in thickness `of the skin. t l

Inmy aforesaid application I have also dis-` closed a Vfeed rollWhch acts merely to press the Work against the cutter but Which has no positive feeding action to advance the Work relatively to the cutter. Y For some types of Work it is desirable to employ a positive feed, but `oni theother hand a constant drive ofthe feedroll is often annoying tothe operator because it interferes With the proper adjustment` ofthe Work inmakin'g it ready for lpresentation to the cutter.`` `In accordance `With the present invention I provide for positively; driving the feed roll by the use of simple, sturdy, and efficient connections Which are operative to drive the roll only When theroll is` In the accompanying drawings Which illus-` trate certain desirable embodiments of the inf., vention'by Way of example: i t

Fig.` l is a front elevation, partly in section and partly broken-away, of a leather shaving machine embodying the, present invention e Fig. :2 is` avertical section on the line 2-2 certain parts at the tiongm ,L Fig. 3` `is a ,fragmentary end elevation, showing portions of the' mechanism` at the,V

left-hand sideof themachine; J

1 Figrlis al section on the line fof 2 shoWingone `desirable `form `of feed rollA but with certain features greatly exaggerated;

Fig. 5 is a front elevation 'of a modified form of feed roll; and

Fig. 6 is a section to larger scale on the line 6-6 of Fig. 5.

Referring to the drawings the main frame of the-machine is indicated as comprising. the left-hand and right-hand upright frame members 1 and 2 which are united in any desirable manner to form a rigidv support for the operating parts. The frame members 1 and 2 are provided with bearings'forthe shaft of a rotary shaving cutter- 3. As here shown this shaft extends to the right of the frame member 2 and is provided with a pulley 3a' which is driven by a belt B passing, yaround a pulley P on the main drive shaft S which turns in bearings in the lower rear part of the frame. The cutter 3 may be of any desirable type preferably employing a plurality of blades, and a grinding Wheel 4 of usual type may, if desired, be provided for sharpeningv the cutter.

. At a suitable point, preferably betweenthe vertical plane .of the cutter axis and the front of the machine, I arrange a horizontal shaft 5 mounted at its opposite ends in vthe .frame members 1 and 2, and on this shaft mount an oscillatory. frame carrying the feed rollsupport. Preferably this oscillatory frame comprises the spaced side members 6 and7 and the Vupper transverse bar'8. This barv is furnished with a swivel stud 9 upon which f is adjustably mountedthe feed roll support 10. This supportmay be adjusted about the stud 9 by means of set screws 12. The feed roll support 10 is furnished with unyieldingv bearings for 'the shaft 13a of the feed roll 13l and as normally adjusted, the shaft 13a is substantially parallel to the axis of the cutter 3, the feed roll being disposed in front of the cutter and withits axis substantially in the same horizontal plane as the cutter axis. For limiting movement Yof the feed roll support away from the cutter stop screws 16 are provided.

In order to swing the feed roll support away from the cutter, the side members -6 and. 7 are extended downwardly below the shaft 5y as shown at 18 and. 19V respectively, and springs 2O and 21 are attached to these downwardly extending portions,vthe rear ends of the springs being attached to convenient parts of the frame; Y

F or moving. the feed roll toward the cutter and for. positively and unyieldingly holding it in operative position, I provide a toggle* mechanism comprising the link v23 having its rear'end pivotally secured to the feed'rollsupportl 10k and havingfits yforward endfconnecltedlby a-'pivot-pinl 27 to therear end of 'asecond link 26 whose forward" endis sup#v ported by Vpintles or trunnions carried' by a slide member 31. Thisslide member restsf upon the flat upper surface of a xed table 32 and may be adjusted thereon by means of the threaded stud 36. For actuating the toggle device, I provide a connecting rod 39 whose upper end engages the pivot pin 27 and whose lower end is secured to a hook H attached to a treadle lever 40 having a foot rest 42 at itsfforward end. This treadle lever 40 is here shown as comprising laterally spaced members disposed adjacent to the frame-members 1 a-n'd'12,4 respectively, with the foot rest42 extending transversely across the machine, but it is to be understood that the treadleleverI may consist of a single member and that the foot rest may be of such width as is desirable. Thetreadle lever, comprisingpthe laterally spaced parts above referred to, isv pivotally supported upon a Yshaft 41 which is -j ournaledrto turn in bearings in the frame members 1 and 2. The treadle lever is free to turn relatively to this shaft, and its downward movement may, if desired, be limited by an adjustable stud 38;

Preferably the feed rolltsupport 1.0 also carries a transverse shaft 43 providedwith a work advancing roller 43a and' having a sprocket wheel 43b at one end. A n apron 44 extends forwardly'andl downwardly to protect the operator and to form a supportv for the work as thelatter. is advanced toward the feed roll.

In accordance with the presentA invention I provide means for drivingthe feed roll positively during the cuttingA operationi and to this endI secure a sprocket wheel 45 rto the drive shaftl S',1and this sprocket wheel drives a sprocket chain 46 which engages a sprocket 47 secured to the shaft 41; This shaft is provided at the leftehand side of? the machine- (Figs. 1 and-3) with a gear 48, and as the shaft 4Si is'constantly rotated while the machine is in operation, the gear 48'is likewise constantly driven.v Theframe member '1 supports afswinging link member 49 by means of `a stub shaft 50, and this swinging. link is provided with a stub shaft 51 (F ig. 3) on which ismounted, to turn freely, a gear 52.

whichhas'ixed thereto a'sprocket wheel 53.

The left-hand member ofthe treadle Ylever isprovided with apin 54 whichV projects out war-dly through a slot 55 inthe frame member 1 and into a hole 56* in the swingingy link 49. This hole 561is of slightly larger diameter than that of the pin. As the'treadle lever'is depressed, the link 49 is swung in a direction to cause the gear .52 tocome'into mesh with thel gear 48v and; to be driven by the latter. A sprocket-chain 57 engages the sprocket wheel 53 and passes around'a.

sprocket wheel 58 on theE end' of' the shaft 13a of the feedroll13 'andwa'lsofabout sprocket 43bon the shaft carrying. roller' 43. .Non

mallyv the gear 52 is disengaged fromthe.

gear 48, but when the operator has positioned the work between the 4feedlrollandthecutter lla asias@ and depressies the treadle ftdforce the feed roll toward Athe cutter andto lockit inop`erative` positidn, the downward movement of the threadle leveralsofbrings the `gear '52 into meshwith theigear 48so that the feed roll" isdriven, thus feeding the work to the cutter in a uniform and positive ",1`nanner.` On the otherhand,` whe'nthetre'adle is released to permit the'feed roll 'to be retracted from" the" j in Fig. the feed rolllS" is lmade of such small diameterthat when the work W is substantially thicker at one` part than another, for example at :its longitudinal center line,

.the feed roll will spring away from the cutter. While such springing may be desirable, V

it is `necessaryto limit the amount of such spring and theposition at which it shall take place in order to obtain a proper shaving action, and to this end I provide one or moreV i H normally fixed abut-ment members here shown as consisting of blocks mounted to slide upon a supporting table 59 carried by the feed roll support 10.` .These blocks as here shown `are individually adjustable toward and from the aXis of the cutter by means of adjusting screws 63 engaging threaded openings in brackets 64; carried by the table 59. These abutment blocks 60 may be of any suitable material, for example of a bearing metal such as bronze, or iron lined with babbit "or, if preferred, they may be provided with recesses or other `arrangements for holding anti-friction elements such as the balls 61 (Fig. Preferably the facesof these blocks which are i intended to bear against the feed roll are concave on an arc substantially concentric with the axis ofthe feed roll. Under some circumstances these abutments `may be permanently fixed in position rather than adjustable, and one or'more such'abutments will beused as desired. v

An alternatlveconstruction is` shown 1n Figs. 5 Vand 6 wherein'the feed roll shaft 13b may beof sti rigid material which will not j springsubstantially during the cutting operation, but is provided with a sheath 65 of yielding material, for example rubber, felt,

j etc., and'of substantial thickness, and having j longitudinally,

a series of hard surfaced rigid rings 66 spaced and snugly embracing the sheath. These rings may be of steel, brass ornother suitable material adapted-to eooperate-in thesame way as the usual metal rollin holding the work up against the cutter. This form of roll is also provided with the abutment blocks as above described, and while providing the desired hard work-engaging surface, is capable of predetermined limitedeXtent. j l

While I havelhereinl shown and describe certain desirable arrangements of parts usestrict -myself thereby to the specific arrangement illustrated, but regard all equivalent ar` rangements as fallingwithin the scope of theV invention.`

I claim: Y

l. A; leather shaving machine having a rotating cutter, a 'feed roll, and means for holding theendportions ofthe feed roll in substantially unyielding predetermined relation to the cutterduring the shaving operation, the feed roll having a work engaging surface which rigidlyl resists deformation froma true circular curvature, said roll being of such construction as to permitthe workengaging surface of the central part of the roll tos'oring away from the cutter-to accommodate `work of non-uniform thickness, and unyielding abutment `means to limit 'the amount of such spring. l 1 j 2. A ieather shaving machine having a rotating cutter and a feed Vroll cooperating there-with, a shaft `for the feed roll, normally fixed and unyielding bearings for the shaft, the feed roll being of such small diameter as compared with'its length that it springs laterally intermediate the ends of the roll in response toy abnormal pressure, and lunyielding abutment means for limiting the amount of such spring. r Y

3. Aieather shaving machine 4havinga cutter and a feed roll cooperating therewith, the effective surface of the feed roll being capable of yielding laterallyV at points intermediate Vthe endsoffthe rollwhen subjected to abnormalpressure5`fsaid surface being indeformable'frofm a circular curvature toen- 4sure proper cooperation with the cutter' and unyieldin lbutadjustable abutment means for limiting such lateral yield.`

- a; leather shavingv machine comprising a cutter, a feedroll cooperating therewith,:

andjsubstantially unyielding bearings for the feed roll, the feed roll being of sosmall diameter. as compared with its length that its centralgportion yields'laterally in response to abnormalpressure, and aplurality of un`v Vyielding abutments spaced longitudinally of theroll for limiting itslateral yield.

z v: 5d; Afleather lshavingmachine comprising J- a cutter, affeed' roll cooperating therewith,

andlffs'u'bstantially unyielding bearings for ffee' d roll, the "work-enga'gingA 'surface of the feed roll intermediateits ends being lat` erallyfyieldable inresponse to abnormal pres` yielding to a j ful for the purpose, I do not intend to re-V ilo sure, said surface being hard and indeformable from a true circular curvature, and an unyielding abutment for limiting. lateral yield of the feed'roll, said abutment comprising anti-friction means for contact with the surface of the roll.

the feed roll intermediate its ends being indeformable from a true circular curvature and being laterally yieldable in response to abnormal pressure, and a plurality ofl unyielding abutments spaced longitudinally of vthe roll for limiting its lateral yield, said abut-ments being independently adjustable.

7. A leather shaving machine having acutter and-a feed roll comprising a core, al sheath of resilient material surrounding the core, and a plurality of substantially hard surfaced rings embracing the sheath and collectively constituting the eective surface of the roll, and unyielding abutment means associated with said roll for limiting the eccentrici'ty of saidy rings relative to the axis of the roll.

8. A leather shaving machine having a cutterand a feed roll, means for moving the feed roll into and out of cooperative relation tothe cutter, means including a pair of cooperating gears and a sprocket chain for driving the feed roll, said gears intermeshing to drive the roll only when the roll is disposed in cooperative relation to the cutter.

9. A leather shaving machine having a cutter and a feed roll, means for moving the feed roll into and out of cooperative relationl to the cutter, said means comprising a treadle, and means for driving the feed roll comprising normally separated gears which are brought into cooperative relation when the treadle is actuated to move the feed roll into cooperative relation to the cutter, and a sprocket chain for transmitting motion from the driven gear to the roll.r

l0. A leather shaving machine having a cutter and a feed roll, means for moving the feedroll into and out of cooperative relation to the cutter, said means comprising a treadle lever,.means for'driving the feed roll comprising a gear coaxial'for the treadle lever-V and a second gear normally out of mesh with said first gear, and meansV actuable by the treadle lever when the latter is moved to bring the rollinto cooperative relationto the cutter forcausing said second gear to mesh with the first gear.

11. A leather shaving machine having a cutter and a feedroll, kmeansfor moving the feed roll. into and out of cooperative relation to the cutter','saidfmeans comprising a* treadle lever, means for driving the feedv roll comprisinga gear coaxial for the treadlelever, a linkrmember supporting a second gear cooperative with the first gear but normally out of'meshwith the latter, and connections between the treadle lever and the linkmember such that, when the treadle is actuatedto bring lthe roll into cooperative relation to the cutter, the second lgear is brought into driving relation to the'first.

12. A. leather shavingvmachine havingl a cutter anday plurality ofl work advancingrolls, means for mov-ing said rolls towardl and from the cutter, said means fcomprising a treadle lever, means for driving the rolls comprising a gear coaxial withfthe treadle' moving the second gear into mesh withl thev first gear. v

Signed by me at Boston, Massachusetts, thisf29th day'of-January, 1930.

FRANK WAYLAND.