US873011A - Knife-polishing machine. - Google Patents

Description

PATENTED DEC. 10, 1907.

G. S. BLAKESLBB. KNIFE POLISHING MAGHINB.

APPLICATION FILED DEC. 28. 1906.

2 SHEETS-SHEET 1.

7 2/ J7 J2 57 x 1 No. 873,011. PATENTED DEC. 10, 1907.

G. S. BLAKESLEE.

KNIFE POLISHING MACHINE.

APPLICATION FILED DEC. 28. 1900.

l 2 SHEETS-SHEET 2.

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GEORGE S. BLAKESLEE, OF CHICAGO, ILLINOIS.

KN IFE-POLISHIN G- MACHINE.

Specification of Letters Patent.

Application filed December 28.1906. Serial No. 349.765.

Patented Dec. 10, 1907.

T 0 all whom it may concern:

Be it known that I, GEORGE S. BLAKES- LEE, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Knife-Polishing Machines, of which the following is a specification, reference being had to the accompanying drawmgs.

This invention relates to machines for cleaning and polishing knife blades and other similar articles.

One of the objects of my invention is to so construct a hood or casing for the polishing wheels of the machine that, when a knife is to be passed between the wheels, it will be guided or directed in such manner as to make it impossible for the operator to move such knife down in a way to cut or injure the flexible covering that is usually applied to the surfaces of such wheels.

Another object of my invention is to provide in connection with the polishing wheels of such a machine a receptacle for containing a powder such as is commonly used in connection with the polishing of knives, and so locating such receptacle that the powder will be discharged immediately over the bite of the polishing wheels, and that at the same time it will be sufficiently removed above such wheels as not to interfere with the proper insertion of knives that are to be operated upon.

Furthermore, it is the object of my invention to provide a construction that will prevent the powder that is fed to the polishing wheels from being blown or scattered over the gearing and other parts of the machine.

I attain these objects by the construction and arrangement of parts shown in the drawings and hereinafter fully described.

In the accompanying drawings :Figure 1 is a top or plan view of my improved machine,

the powder receptacle being broken away and a portion of the gear covering also being broken away. Fig. 2 is an end view, the housing over the polishing wheels and the powder receptacle, however, being shown in section. Fig. 3 is a vertical section taken at line 3 3 of Fig. 2.

Referring to the several figures of the drawings, in which corresponding parts are indicated by like reference characters, 5 indicates a base, preferably of metal, supported, in the construction shown, on suitable corner legs 6.

7 indicates a main driving shaft which is supported in suitable bearings 8 9 a short distance above the base 5.

10 indicates a'bevel gear on the shaft 7 which is adapted to mesh with another bevel gear 11 secured on the inner end of a short shaft journaled in a suitable bearing 12 on the end of which shaft is secured a crank 13. By these devices, the machine is adapted to be turned by hand. If it is desired to operate the machine by power, the bevel gear 10 may be moved along the shaft 7 out of engagement with the gear 11 and power may be applied by means of a belt over the pulley 15 on the projecting end of the shaft 7. 14 indicates a loose pulley on said shaft 7.

16 17 indicate a pair of polishing wheels covered with any suitable facing, such as is commonly employed on wheels in machines of this character. The wheel. 16 is fast upon the shaft 7 so as to rotate therewith.

18 indicates a frame bolted to the upper face of the base 5 and inclosing the lower portions of the polishing wheels 16 17. As shown, this frame is considerably higher at its ends than at its central portion, such central portion being below the central or contacting portions of the polishing wheels. Upon the upperedges of the two side walls of this lower central portion of the frame 18, are placed blocks 19 which act as stops for the blades that are being cleaned to come in contact with.

20 indicates an axle upon which the wheel 17 is mounted. supported in bearings 21 in a frame the sides The ends of this axle 20 are of which are each in the form of a bell-crank.

These two bell-cranks of this frame are indi cated by 22 and 23, 22 being the rearwardlyextending portion, and 23 the-downwardlyextending portion. The outer ends of the portions 22 are connected by an end-piece 24., as clearly shown in Fig. 1, which, in the form of construction illustrated, is integral with the other portions of the frame. This double crank flame embraces the frame 18 at one end, and to such frame or housing the depending arms are attached by suitable pivot bolts 25. The end of the frame 18, to which this bell-crank is attached, is provided with an ear 27, and directly beneath this ear, when the parts are in position, is another ear 28 extending out from the endbar 2 1 of the bell-crank lever frame. 29 indicates a screw suitably secured against turning in the ear 28, such screw passing through an opening in the ear 27 and being held in place by a thumb-nut 30. By means of this construction of bell-crank lever,which is fully set forth in my prior patent, No. 833,153, dated October 16, 1906,the polishing wheel 17 can be moved to bear with greater or less force against the other polishing wheel.

31 indicates a short shaft mounted in a suitable bearing 32 that is supported from the base 5.

33 indicates a connection, in the form of a twisted bar, that connects the inner ends of the short shafts 20 and 31, as explained in my said former patent.

34 indicates a gear on the end of the main drive shaft 7 which meshes with another similar gear fast on the short shaft 31, these two gears being covered by a suitable covering 35.

36 37 indicate hoods over the wheels 16 17, respectively, and inclosing the upper portions of such wheels. The top portions of these hoods are curved to conform to the wheels over which they respectively lie, and their inner ends lie quite close to each other, so as to leave a narrow slot directly over the bite of the two wheels, through which slot a knife blade can pass. This slot is indicated by 38. The inner ends of the top plates of the hoods are correspondingly notched, as indicated. at 39, so as to provide an opening of sufficient size to admit of powder being discharged from above, as hereinafter described, onto the surfaces of the wheels when a knife is in place between such wheels or is being inserted into the machine. The slot 38 is but little more than wide enough to permit of the free insertion of an ordinary knife blade, and, if these notches 39 were not provided, a knife in place in the machine, or being inserted into the machine, would prevent the free flow of powder to the wheels.

By reason of bringing the inner ends of the hoods 36 and 37 close together, as described, and curving such ends downwardly, a perfect guard is formed which will prevent a knife being so entered as to cut or injure the facing on the wheels. These hoods 36 and 37 are adapted to be removably secured to the ends of the frame 18 by bolts 40, as shown, or in any other suitable manner. It is desirable that these hoods be rigidly connected together so that they can both be removed or replaced simultaneously, and to this end I have provided a bridge-piece 41, which is riveted, or otherwise suitably secured, at its ends, to the tops of such curved hoods. In order that such bridge-piece may not interfere with the free insertion of a knife, its central portion is raised, as clearly shown in Fig. 2. This bridge-piece, in addition to serving as a connecting means for the two hoods, serves also as a support for a receptacle 42 which is screw-threaded into a suitable opening in the raised central portion of the bridge-piece 41, in the construction shown. It might, however, be otherwise secured, of course. As shown, the lower portion of this receptacle is hopper-shaped, so that powder placed therein will more readily pass therefrom. 43 indicates a discharge opening in the bottom of this receptacle 42, such opening being located directly above the bite of the wheels 16 17.

44 indicates a bent shaft serving as an agitator to stir up the powder in the receptacle. into the opening 43 and closes it sufficiently so that practically no powder will escape from the receptacle except when the shaft is turned.

45 indicates a removable cover for the receptacle 42, through which cover the upper end of the shaft 44 passes, such end. of the shaft being turned to form a suitable operating handle 46.

47 indicates an opening of suitable size.

formed in the base 5 immediately below the line of contact of the wheels 16 17. Below this opening 47 is suitably secured a movable drawer 48 provided on its outer end with a handle 49. This drawer is provided to catch the powder that drops from the wheels 16 17.

50 indicates short hollow studs rising from the bearings of the shafts 7 and 20 at each side of the two polishing wheels, through which lubricant is adapted to be fed to such shafts. Over the top of each one of these hollow studs 50 is a cover 51, each cover hav, ing a projecting ear 53 through which a pivot 52 passes into one of the side walls of the adjacent hood. These pivoted covers 51 can be turned up to permit lubricant to be poured into the hollow studs. This is an improvement over my former construction in which the covers were formed as integral ears on the hoods, and served the double purpose of covering such studs and acting as bearing plates for the hoods. It was therefore necessary in my former construction to entirely remove the hoods in order to insert lubricant into the studs. With my present construction, of course, the, hoods do not have to be moved with relation to the frame 18.

By my invention, 1 provide the polishing I The lower end of this shaft 44 passes multaneous removal, and, by reason of being rigidly connected together, are supported wholly at their outer ends upon the frame 18. Of course, if they were not connected together each hood would require two points of support, as in the construction illustrated in my said Patent N 0. 833,153. The construction illustrated also enables powder to be applied properly to the wheels whether a knife has been inserted or is being inserted or not, all as above explained.

What I- claim as my invention and desire to secure by Letters Patent is 1. In a knife-polishing machine, the combination with two rotatable polishing wheels placed edge to edge, .of a covering over the same consisting of a pair of separate, movable hoods, the inner edges of such hoods being close to the bite of the wheels, whereby a narrow slot is formed into which a knife can be entered and be directed down between said wheels, and means for connecting gaid hoods together, substantially as speci- 2. In a knife-polishing machine, the combination with two rotatable polishing wheels placed edge to edge, of a covering over the same consisting of a separate semi-cylindrical hood portion over each wheel, the inner edges of such hood portions being close to the bite of the wheels, whereby a narrow slot is formed into which a knife can be entered and be directed down between said wheels, and an arched bridgepiece secured to the upper faces of said hood portions for connecting such hood portions together, substantially as specified.

3. Ina knife-polishing machine, the combination with two rotatable polishing wheels lying in the same plane and placed edge to edge, of a covering over the same having a slot directly over the bite of the wheels to permit and direct the passage of a knife between the wheels, and a powder receptacle carried by said covering and having a discharge, opening adapted to direct powder from the receptacle onto the surfaces of said wheels, substantially as specified.

4. In a knife-polishing machine, the combination with two rotatable polishing wheels lying in the same plane and placed edge to edge, of a powder receptacle above said wheels, and a covering over said wheels having a slot directly over the bite of the wheels to permit and direct the passage of a knife between the wheels, said slot being widened between its ends to permit powder to be fed to the wheels at the same time that a knife is in position between the wheels, substantially as specified.

5. In a knife-polishing machine, the combination with two rotatable polishing wheels lying in the same plane and placed edge to edge, of a covering over the same having a slot directly over the bite of the wheels to permit the passage of a knife between the wheels, said slot being widened between its ends to permit powder to be fed to the wheels at the same time that a knife is in position between the wheels, and a powder receptacle carried by said covering and having a discharge opening adapted to direct powder through said slot, substantially as specified.

6. In a knife-polishing machine, the combination with two rotatable polishing wheels lying in the same plane and placed edge to edge, of a covering over the same consisting of a curved hood portion over each wheel, the inner edges of such hood portions being close to the bite of the wheels to form a narrow slot open at both ends into which a knife can be entered and by which it will be directed down between said wheels, the edges of'such slot being notched so that powder may pass to the wheels when a knife is in said slot, a bridge-piece secured to the upper faces of said hood portions, and a powder receptacle secured to said bridge-piece, substantially as specified.

7. In a knife-polishing machine, the combination with two rotatable polishing wheels placed edge to edge, of a covering over the same consisting of a curved hood portion over each wheel, the inner edges of such hood portions being close to the bite of the wheels to form a narrow slot into which a knife can be entered and by which it will be directed down between said wheels, the opposite edges of such slot being notched so that powder may pass to the wheels when a knife is in said slot, a bridge-piece raised at its central portion and secured at its ends to the upper faces of the hood portions, and a powder receptacle secured to the raised central part of said bridge-piece, substantially as specified.

8. In a knife-polishing machine, the combination with a rotatable polishing wheel, a shaft therefor, bearings on opposite sides of the wheel for said shaft, and hollow studs rising from said bearings, through which studs lubricant is adapted to be fed, of a removable hood for said wheel, and covers pivotally attached to the sides of said hood adapted to close the upper ends of said hollow studs, substantially as specified.

GEORGE S. BLAKESLEE.

\ Witnesses:

ALBERT H. ADAMS, WILLIAM H. DE BUsK.

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