US944238A - Breaster-knife-grinding machine. - Google Patents

Description

J. J. HEYS.v

BREASTER KNIFE GRINDING MACHINE.

APPLICATION FILED JULY 17,1906. 944,238. Patented Dec. 21, 1909.

2 SHEETs-SH3ET 1.

7 5 y 4 1 W Q. J Mn. J, flaf s J. J. HEYS. BREASTER KNIFE GRINDING'MAGHINE. APPLIOATION FILED JULY 17,1906.

Patented Dec. 21, 1909'.

2 SHEETS-SHEET 2.

VUNITED s rn'rns rnnn r nron.

JOHN J. KEYS, OF LY NN, MASSACHUSETTS, ASSIGNOR BY MESNE ASSIGNMENTS, T0 THOMAS G. PLANT, OF..BOSTON, MASSACHUSETTS.

. BREAs'rER-KNIFE-GRINISING MACHINE.

Specification of Letters Patent. Patented Dec. 21, 1909.

Application filed July 1'7, 1906. Serial No. 826,537.

. ing 'blades or knives, particularly adapted (-on'tour for the heel.

for use in breasting machines designed to operate upon the heel breasts of boots and shoes. In certain aspects of, the invention,

however, it may be used in grinding blades or knives intended for other purposes as, for example, chisels and other tools.

The heel, as applied to a boot or shoe, is constructed of a series of superposed layers having rough and uneven or overlapping edges when positioned. In the formation of the shoe. after the body of the heel has been built up, the top lift is secured thereto, it being a layer of leather having the proper The rounded or outer edge of the heel body is then suitably shaved to conform to the shape of that portion of the top lift. The breast of the heel, to-' gether with that of the top lift is then shaped by ablade or knife the face of which conforms to the shape of the heel breast and the edge of which is shaped to conform to the shoe shank. The breast of the heel commonly concaved, although in certain. types of it is made strai ht. The shoe shank, to the form of which t e edge of the knife should conform, is generally convex.

Thus, the blade or knife commonly employed in cutting or shaping the heel breast has a-convex face and a concave edge. 'So

'far as I am aware, no means have previously been devised to accurately or reliably and effectively grind a blade or knife so that the face thereof shall have the curvature of the heel breast onso that the edge shall conform to the curvature of the shoe shank. In the practice of my invention I am enabled to secure both of these results together with various other advantages and features which will be best understood from a descri tion of one embodiment or type o'f-ma'chine t ereof, illustrating my inventionpthe' same 'be- I ing shown in the accompanying drawings, wherein Figure 1 is a side elevation (the grind'ng wheel being shown insection of a mach nc constructed in accordance wit my invention and adapted to gl'ind-the face and edge of a knife into suitable form for use in a heel breasting machine; the driving pulle s beof supporting and driving the grinding wheel; Fig. 3 is a detail showing in vertical section the means for altering or adjusting the pivot-of-{the' spindle of the blade carrier to vary the curvature of the arc of traverse of the blade carrier; Fig. 4 is a side eleva tion (the machine frame being shown partly in section) of the means for supporting the grinding wheel, the knife carrier being removed; Fig. 5 is a front elevation of a portion of the frame of the machine looking to the right in Fig. 1, and showing a portion of the means for varying the projection of the blade carrier during its traversing'movement; and Fig. 6 is an elevation of the ma-. chine and a portion of the frame thereof, looking somewhat downward and to the right in Fig. 1-. i I

In the particular embodiment of my invention selected for illustration here and shown in the drawings, the frame of the machine (Fig. 1) is indicated at l, the same having a suitable base 2 and front, intermediate and rear uprights, 3, 1, and 5, respectively, projecting therefrom. In the rear upright'IFigs. 2 and 4) a short shaft 6, is

journaled upon which is loosely mounted a lever 7 in the front arm 9 (see Fig. 2) of which is mounted for rotation a spindle 11,

carrying at one end thereof a pulley 12, and at the opposite end thereof a grinding wheel 13 of any desired type but preferably a, frusto conical emery wheel. Mounted loosely on the shaft 6 is a loose pulley 14,

also a fast pulley 15, adapted to be connected by belting with any suitable source of power. Upon the opposite end of the shaft 6 is secured a pulley 16, adapted to be suitablyconnccted by a band with the pulley 12 u on the spindle 11 offth'e grinding whee whereby the latter'may be rotated at any desired 5 eed,while at the same time permitting said wheel to be oscillated verlically about'the axis of the pulley shaft 6.

v '10 the-rear endof the lever 7 (see Fig. 4)

is suitably connected a link 8, connected at its other or lower end to any sultable treadle or equivalent mechanism for raising and lowering the grinding wheel at will.

1 Upon the .mrig'nt 5 and preferably adjacent the lever 7, (see Fig. 2 and dotted lines Fig. 4) is a. horizontal arm 8 having thereon a set screw 8"ada ted to engage a lug or projection 8 upon t .e forward end of the said lever 7, and to act as an adjustable stop to limit the upward movement of the emery wheel, so that even though too great pressure he brought to bear upon the treadle, no injurious action results and the temper of the blade'is not affected. By providing an adjustable stop any desired degree of contact of the sharpening means and the blade can be secured.

The emery wheel may be secured upon the shaft 11 in any desired manner and preferably see Fig. 1) by a nut and washer 17, so

that t e said wheel may be readily removed if desired. v

The blade or knife to be ground (see Fig.

1) is represented at 18, the same being secured to its support 19 in any desired manner, as by means of a threaded-bolt 20 passing throughthe usual slot or openmg in the blade or 1ts permanent holder and into the said support 19. Upon the outer end of the threaded bolt is secured a handled nut 21, 1 whereby the blade may be securely clamped in position upon its support. The support 19 for the blade to be ground is preferably inounted to slide longitudinally to and from the grinder insuitable guide ways in a carrier 22, for a purpose to be more fully described hereinafter. The carrier 22 (see Fig.1) is preferably mounted to slide transversely on a dovetailed head 23 of a spindle '24, the latter'resting at its lower end when not in' operation upon a suitable step or base 25'projectingupwardfrom or secured upon the frame 1 ofthe machlne. This;

sliding capacity is availed. of only'when grinding flat blades, at all other times it is prevented by a spring pin or lock 23 entering said support; y

The grinding. wheel or element and the I blade support are adapted to have a relative bodily traverse imparted thereto, and preferably this traverse is in a curved path or are. In that embodiment of my lnventlon herein shown I have chosen to traverse the blade support with respect to the grinding '1' preferably alsoprovide means to alter or change the curvature of the said element.

are of traverse, to'suit. the curvature of the heel breast, in different types of boots and shoes as has been; previously referred to. As one embodiment of means to provide capacity for such are ,of traverse of the" blade-support, the spindle 24 is adapted to receive a rocking movement upon .a horizontal axis or (pivotalpoint adapted to be shifted longitu i the curvature of the arc of oscillation. To

this end, there is provided (5% Figs. 1 and L ing spindle 24 and has mounted in its opposite faces (Figs, '1 and 6) spring pressed pins 33 adapted to enter positioningsockets in said spindle. In Fig. 1 the series of sockets 35 extending throughout the greater portion of the length of one face of the spindle are shown in full here while-in the opposite face of the said spindle 24.- is protoo closely and without making them unnecessarily small. In order to pro erl'y position the pivotal point "of the spindle, 24, the handled nut 37 (see. Figs. 1 and'3) upon the outer screw threaded end of the spindle is loosened and thehead'29 of the spindle is shifted in the guide 28 to the I. desired position, carrying therewith the.

yoke 32, one of the pins 33 being projected by its springinto that socket 35 or-36 with which the pin has been brought into alinement, thereby securin the pivotal support for the'spindle at the esired position.

as has been previously stated, the blade ',is, designed to cut a heelbreast which is ordinarily concaved and to that end the :bliide is provided with. two faces respectively concaved and convexed. In Fig. 1 the blade is represented as positioned with its concave face in contact wlth the rinding wheel. \Vhen it is desired to grind a blade [Whose faces shall have a curvature of the desiredarc ofa curv'ed heel breast, the blade having been secured in position, is in this embodiment of my invention rocked back and forth about'the pivot stud 30 as a center, past the face of the grinding wheel by any convenient and suitable means preferably by the operative who grasps any convenient portion of the rocking part. It, is apparent that the curvature of the are represented by the inneror concave face of the blade is dependent upon the length of the. radius pertaining to su'ch are. If, therefore, the

s indle 24 or ot-her equivalentsupport for t e bIade were rockedupon a.permanent or nally of the spindle to vary 7 vided a second series of sockets 36, which are shown as intermediate the sockets 35 so I that the desiredfinene'ss of adjustment may be'secured without spacing the said sockets the curvature of the. face of the blade would necessarily be invariable. By altering the radius referred to, the curvature of travel 'of the blade may be made to correspond with that of the concave face of the blade.

It is obvious that the said radius may be the arc represented by the blade of the knife falls within the scope of the invention. In practice the sockets upon the sides of the depending spindle will be marked or identified by characters indicating the different radii of oscillations ininehes so as to facilitate quick adjustment to any blade presented. Thusfor example the yoke will be adjusted to the socket marked 6 for a blade of 6" radius.

If it be desired to grind a blade having a flat face to operate "upon a straight heel breast, itis clear that such blade should be traversed past the grinder in a straight line instead of a curved line as described. To this end and to engage the lower end of the depending spindle 2% I have preferably pivoted in suitable ears 26 projecting from the machine frame a catch 27, an edge ofwhich in the position shown in full lines in Fig.

- 1 is adapted to engage a corresponding slot or groove in said spindleQd to hold the same against oscillation and at the same time the spring latch 23 at the head of the spindle is released to free the dovetailed slide 22 and permit it 'to slide freely on the now stationary dovetailed head '23. My machine is therefore conveniently adapted to grind said. shank. Inasmuch as the latter is ordinarily convex, it. is usually necessary to provide a kmfe with a concave edge. I have devised means for forming such an edgewhether having curved or flat face and preferably do so while grinding the face thereof, although it is obvious that the two operations may be entirely distinct and carried on in different machines orat different-times.

The embodiment of means here represent-- ed includes devices acting during the relative movement or traverse ,of the grinding mechanism and theblad'e to modify the traversing movement by, altering during such movement the amount of projection of he blade support to conform to the grindi g edge of the blade with respect to the grinding wheel, and also means to adjust or vary the action of such traversing movement modifying means. That is to say, and viewing the mechanism shown in Fig. L'by projecting the blade 18 forwardly toward the grinding wheel to a'minimum extent at the beginning of. the rocking movement of the spindle 24 and increasing such projection v toa maximum extent at the middle of the rocking nmvement, and then correspondingly reducing the same to a minimum again it is apparent that a concaved edge will be imparted to the said blade. Although I have stated that the blade may be projected to a minimum and then to a maximum extent toward the active face of the grinding wheel, such expression is used in; abroad sense and contemplates the relative projection of the blade toward the grinding Wheel. That is to say, it is within the scope of the invention to project the grinding wheel in the described-manner toward the blade.

In that embodiment of my inventionwherein the blade is rejectedtoward the grinding wheel, I pre er to connect an end of the blade support by means of a radius arm, with a fixed though adjustable point of support, so that during the of the spindle 24 upon its pivot the said sup ort shall receive the forwardand back sli ing movement. to produce the curve of the cutting edge. As one form of mechanism to suitably connect the blade support in the described manner, upon the upright 3 of the frame of the machine is a stud 38 upon which is mounted (see Fig. 1) a bell crank lever 39, the lower arm 40 of which has mounted therein a pin 41, preferably spring pressed (see F1g. 5) the said pin being adapted to engage the proper one of the series of sockets 42'suit ably formed in the ,framework of the machine. The upper arm of the lever 39 has preferably formed thereon a rounded head 43 so as to form a ball and socket joint with the socket 445 that is adjustably secured to the radius arm 45 b means of a threaded bolt 46 passing throng (see Fig. 5) a slot 46' in said arm, and having mounted upon the up r end thereof a port I have preferably formed 11 n the inner end of the radius arm a ronn ed head 48 adapted to engage asuitable near the end of the blade support. It is obvious that the'efiective length of the radius arm may be altered by providing instead Amadjustable connection between the saute and theblade carrier. By the described mechanelement, or, in other words, to position the ism Iii/is apparent that in the-reciprocation,

is. handled nut 4!? whereby t e socket 44; may' to couple the radius arm with the blade supor in the rocking or oscillation of the spindle 1 edge of the blade. The radius of this move-" ment and consequently the concavity of the knife edge may be varied at will by adjustment of the arm LO-of the bell crank. I may omit or disconnect the described mechanism to vary the amount of projection of the blade support relative to the emery Wheel, that is to say, the radius arm 45 or its equivalent and the parts connected therewith, to

modify the traverse of the-blade support in the manner previously described, and yet secure thevproper grinding of the concave face and the concave edge of the blade simul: taneously, by imparting a relative traverse to the carrier of the blade support and the grindin whereo is less than that of-the arc represented by the concave face of the blade. In

other words, if for example the blade he what is known as a six inch blade, or one the radius of whose arc is six inches, I may rock the blade carrier thereof in an arc of a somewhat less radius, and thereby correctly grind both the concave face and concave edge of the blade. In such relative traverse of the blade support and theemery wheel, a blade representing a certain arc is rocked upon a I I pIlSlIlg curved sharpening means, a blade! shorten than the true radius, with the result that the emery wheel is brought intosuch deep relation with the blade as to enter into and grind. the concaved edge thereof while grinding the concaved face.

Although in setting forth this embodiment of the invention the same is s ecifically described, I Wish it to be clear y understood that descriptive terms are used in their generalsense and not in theirspecific nature,

I and, that the scope of the invention .is set forth in the following claims I 1. A blade sharpening mechanism oomprisin sharpening means, a blade support,

said s arpening means and? blade support having capacity for relative traverse, and

means acting continuously during the trav ersing movement to vary the relative position-of projection of theblade supportand sharpening means.

2A blade sharpening mechanism comprising curved sharpening means, a blade support constructed and arranged to support the blade with its cutting edge extending in the direction of curvature of saidsharpening means, said-blade support having capacity for traversing movement with respect to said sharpenin means, and traverse modif ing means including a member having a xed point of support and connected to the blade support to impartto the blade varyingpo: I sitions of projection-toward the sharpening meansdurmg the traversing movement.

means upon an arc the radius fying means to project the blade support in the plane thereof toward the sharpening means in a curved path during said traversing movement.

4. A blade sharpening mechanism comprising sharpening means, a blade support,

said blade support and sharpening means having-ca acity for relative traverse, traverse mOdI mg meansactmg continuously durlng the traversing movement to alter the so amount of projection of, theblade support relatively to the sharpening means and action varying means to vary the action of said traverse modifying means.

blade sharpening mechanlsmj comprising curved sharpenmg means, a blade sup ort constructed and arrang'edto support the lade with its'cutting edge extending in the direction of curvature of said sharpening means, said blade support havingfcapacity.

for traversing movement with respect to said sharpenin support'constructed and arranged to support the bladewith its cutting edge extending in the direction of curvature of said sharpening means, and traverse'modif ingf means mc udmg a member having a xed means, a pivotal base for said support where on the same may be bodily trayersedin an are relatively to said sharpeninlg means, and

to alter the curvature o said 'iiic'. i

'5'. A blade sharpening t-me chamsm cone prising curved sharpening means, a blade means to adjust the said ivfitafbase, thereby 3 support constructed and arranged to support the blade with itscutting edge extending in the direction of curvature of said sharpening means and are controlled traversing means to impart Felative bodily traverseto said blade, support and sharpenmg means ina curved path. y f

8. blade sharpening mechanism. comllf) prising curved sharpening means',=a bladev support constructed andjarrangedto support the blade with'its cutting edge 'eiiten-ding in the direction of curvature of said"Sharpe'n'ing means, are controlled traversingmeans to impart relative bodily traversctoflf's (1 blade support and sharpcnin means inj'ia icurved path',.-an d traverse modifyin means to' alter the'ainount of projection ofthe blade suport relative to said sharpening means dun mg saidtraverse.-

9. A blade sharpening mechanism comprising sharpening means,'a blade support,

are. controlled traversing means toi impart bodily traverse to said blade support in a curved path with respect to said sharpening means, and traverse modifying means to project said blade support toward the sharpening means in a curved path during said traverse. a I

10. A. blade sharpening mechanism comprising sharpening means. a blade support,

' said sharpening means'and blade support having capacity for relative traverse, and

. means, acting continuously during said traversing movement, to relatively project said blade support and sharpening means toward each other in-a direction at an angle to that of the traversing movement.

11. A blade sharpening mechanism comprising sharpening means, a blade support,

.said sharpening means and blade support having ca pacity for relative traverse, and traverse modifying means acting during the traversing movement to modify such traverse in a plurality of directions.

12. A .blade sharpening mechanism comprising sharpening means, a blade support,

said sharpening means and blade .support having capacity for re ative'traversc, traverse modifying means acting during the H. )e-blade sharpening mechanism com prising a curved sharpening means, a blade support constructed and arranged to support the blade with its cutting edge extending in the direction of curvature of said sharpening means, said sharpening means.

and blade support having capacity for relative traverse movement, traverse modifying movement means acting during said traverse to alter the amount of projection of the blade support and sharpening means, means to manually control one of said movements, and means to automatically control the. other of said movements.

15. A. blade sharpening mechanism comprising sharpening means, a blade support, said sharpening means and blade support having capacity for relative traverse, and means to move relatively the sharpening means and blade support to bring the sharpening means into sharpening relation independently of said relative traverse.

16. A blade sharpening mechanism comprising curved sharpening means, a blade support constructed and arranged to support the blade with its cutting edge extendinginthe direction of curvature of saidshariening means, said sharpening means and lade support having capacity for relative traverse, and automatic means acting during said traversing movement to alter the relative position of said sharpening means and blade support.

, 17. A blade sharpening mechanism comprising curved sharpening means, a blade support constructed and arranged'to support the blade with its cutting edge extending in the direction of'curvatureof said sharpening means, said sharpening means and blade support having capacity for relative traverse .and automatic means acting during said traversing movement to alter the path thereof.

18. A grinding mechanism comprising curved sharpening means, a blade support constructed and arranged to support the blade with its cutting edge extending in the direction of curvature, of said sharpening means, said sharpening means and blade support having capacity for relative traverse movement. and automatic means to vary during the said traverse movement the line of relative travel of the edge of the blade mounted in the support.

it). A grinding machine comprising sharpening means a. blade support, means for moving the said sharpening means towardthe blade support, and devices for controlling the extent ot such movement that any desired contact with the member to be sharpened can, be efl'ected with a view of retaining the temper of the blade being ground or sharpened. Y

20. A concave blade sharpening mechanism comprising curved sharpening means, a blade support constructed and arranged to support the blade with its cutting edge extending in the direction of curvature of said sharpening means and means for imparting a relative bodily traverse to said sharpening means and said blade support in a curved path the radius whereof is other than that represented by the concave face of the blade.

21. In a breaster knife grinding machine, the combination of a grinder having a curved edge, means for operating the grinder, a knife holder for supporting a knife having a concaved cutting edge extending in the direction of curvature of the" grinder and partially enveloping the same, and means for changing the relative position of the knife and grinder to enable the latter to simultaneously grind the curved edge and concaved face of the knife.

22. In a breaster knife grinding machine, a grinder having a curved surface, a swinging knife holder arranged to support the knife with its edge extending in the direction of curvature o'f said grinder, and with its concaved face 'enve1op1ng said curvature and means to alter the effective radius on "which said holder swmgs.

5 controlling said movement adapted to per- W itnesseszf I 23. Abreusterknifegrindingmachinecolm 1 In testimony whereof, I ha\'e'signec1 my risin a grinder, a knife support mountecl name to this specification, in the presence of.

or movement about the grinder to grind two SUbSCIIbIIIg WItIIGSSGS.

the concaved face of the knife, and means J OHN J HEYS;

mit the concavelycurved edge of the knife SIDNEY F. SMITH, to be simultaneously ground. 7 ROBERT H. :KAMMLER;

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