US1959647A - Abrading device - Google Patents

Description

May 22, 1934.

J. M. STIVERS ,959 647 ABRADING DEVICE Filed July 21, 1932 2 Sheets-Sheet l A llorney Inventor May 22, 1934.,

J. M. STIVERS 1,959,647

ABRADING- DEVICE I Filed July 21, 1932 2 Sheets-Sheet 2 A llorney Patented May 22, 1934 UNITED STATES PATENT OFFICE M. Hanley, receiver f or Equity Finance & In-

vestment Corporation, a corporation of Delaware Application July 21, 1932, Serial No. 623,881

8 Claims.

This invention relates to abrading devices, and is an improvement on my co-pending application Ser. No. 508,965, filed January 15, 1931, and which has issued as Patent No. 1,935,592, dated November 13, 1933, and is a continuation in part of my co-pending application Ser. No. 515,850,

filed February 14, 1931.

Among the objects of my invention is to provide an abrading device for sharpening edge tools by the manual movement of the edge tool over any one of a plurality of stationary stones of graduating fineness, said plurality of stones being arranged to revolve in a non-leakable vessel containing oil of a penetrating character, such as to prevent the pores of the stones becoming filled and slick or glazed.

It is well known that the use of rotating grinders for sharpening edge .tools tends to take the temper out of such tools, thus resulting in a re- .20 luctance on the part of butchers, and others having many edge tools to sharpen, for using such rotary grinders. Butchers and others whose work requires the use of edge tools much prefer the old way of whetting a knife, or the like, to sharpen the same, but this prior to my invention has been too slow and inefficient due to the pores of the stone becoming filled with grease, and the like, resulting in the surface of the stone becoming glazed and slick.

This glazed and slick surface on the stone results from many reasons, such as accumulation thereon of dirt and the use on 'such stone of a lubricant containing parafiin, or other base, that would tend to fill up the pores and glaze the surface of the stone.

I have discovered that this glazed or slick condition of the surface of the stone can be avoided if the stones are mounted to rotate in a vessel containing to a sufficient depth an oil of a penetrating nature, such that it will penetrate the pores of the stone and wash off from the surface of the stone any foreign particles such as dirt, steel particles, and the like, thus presenting for use at all times an unglazed abrasive stone surface, which may be held stationary while in use, and swung through the oil for cleaning purposes when not in use.

In .the present invention I preferably adopt a rotating body portion having three faces, on which may be mounted three stones, each one varying in coarseness with relation to the others, so thatthe user may first use the coarse stone, next one a little finer and lastly the finest of thethree. This body portion thus forms a rotor which is rotatably mounted in a receptacle com taining an oil bath, through which bath the stones may be swung for cleansing and oiling purposes when desired, and the stone being used may be held at the top in a horizontal position. This swinging in space of the stones prevents their picking up dirt, grease, and the like,-that would result from continually laying them on benches, or other places of deposit, and with the oil bath keeps the stones at all times clean and ready for use. Any foreign matters washed oif the stones by the oil will sink to the bottom of the receptacle, and when desired the oil may be strained off and the dirt removed from the receptacle and refilled with fresh or clean oil. This 051 does not become stagnant, and also prevents rust of the metal parts of the apparatus.

Among the further objects of my invention is the accomplishment of the advantages and elimination of the disadvantages set forth above.

Other objects, advantages and capabilities will later more fully appear.

My invention further resides in the combination, construction and arrangement of parts illustrated in the accompanying drawings, and while I have shown therein a preferred embodiment I-wish it understood that the same is susceptible of modification and change without departing from the spirit of my invention.

In the drawings- Figure 1 is a top plan view of an abrading device embodying the present invention.

Fig. 2 is a longitudinal vertical section taken through the axisof rotation of the rotor.

Fig. 3 is an end elevation of the rotor with the stones clamped in position thereon.

Fig. 4 is a perspective detail view of the rotor.

Fig. 5 is a perspective view of one of the plates f or'clamping the stones in position upon the rotor.

Fig. 6 is a vertical transverse section through the assembled device.

Referring more in detail to the drawings, the receptacle 5 is adapted to contain oil of a penetrating nature and not having a parafiin, asphalt or other base, such that would tend to fill up the pores of the abrading stones and cause them to become glazed and slick. Such oil is designated in Fig. 6 as o, and filling the receptacle 5 to the level a. The top of this receptacle is open and the receptacle is illustrated as being substantially rectangular in shape.

The receptacle is provided at the upper portion of each of its ends with an upstanding ear 6, one of which ears is provided with an opening 6, while the other is provided with a slot or notch '7.

The rotor is indicated generally at 8 in Fig. 4, and comprises the core 9, provided with radiating ribs 10, extending longitudinally of the core, and having their corners beveled or flattened as at 11, to provide seats for the abrading slabs 12. As will be seen in Fig. 6, the abrading slabs are positioned with their inner face resting against these beveled or flattened corner portions, and are securely held in such position by the clamping plates 13, each having a trunnion 14 and apertures 15, through which apertures extend fastening screws 16, whose threaded portions are screwed into threaded openings 17 As will be readily understood, and as shown in Fig. 2, there is provided one of these clamping plates for each end of the rotor. As will be noted in Fig. 4, the threaded openings 1'7 are positioned one in each of the ribs 10, and in such manner that there will be two clamping screws adjlacent each end of each of the abrading slabs. This gives greater stability to the abrading stones when assembled and fixed in position on the rotor.

Tightening of the screws 16 will draw the clamping plates 13 into clamping engagement with the end of the abrading stones 12, and there being one of these clamping plates at each end of the rotor it will thus be readily apparent that the abrading stones will be securely held between the two clamping plates just referred to. In this connection it will be readily understood that each of the abrading stones 12 should be slightly greater in length than the length of the rotor 9 in order to facilitate this clamping action.

As will be readily understood the assembled rotor and abrading stones will be positioned in the receptacle by inserting one of the trunnions 14 in the opening 6' by longitudinal movement, after which the trunnion 14 at the opposite end of the rotor will be lowered into the slot or notch '7. If desired, one end of the receptacle may be provided with a set screw 18 threaded therein,

which set screw may be tightened in any desirable manner to abut or engage a clamping plate 13 and to hold the abrading stones being used in substantially horizontal position. Should the metal of the receptacle be too thin to suitably accommodate such set screw the metal may be made thicker at such point to give sufficient bearing for the threaded portion which receives the set screw.

As will be apparent in Fig. 6, this arrangement of abrading stones is such that when the upper substantially horizontal stone is being used there is no danger or likelihood of the implement being sharpened striking against any protruding edges, corners, or the like. It is also apparent that this arrangement is such that these devices can be economically manufactured and willbe durable in use.

From the above arrangement it is believed the operation of the device of this invention will be readily apparent. The operator in sharpening an edge tool will, if the tool is very dull, first draw it back and forth in the customary manner for sharpening upon the coarsest stone. After having used the coarsest stone to the desired extent he will rotate the rotor (having first loosened the tightening set screw for holding the rotor against rotation if such set screw is used) to bring the next finer stone into substantially horizontal position, and sharpen the implement to the desired extent upon this stone. When three stones are used, as illustrated in the drawings of the present application, he will finally rotate the finest of the three stones into substantially horizontal position at the top of the rotor, and finish the sharpening operation upon this finest stone.

The rotating of the abrading stones from one position to the other through the oil, or rotating the rotor one or more times through the oil, will wash away from the face of each of the stones any steel. that has been removed from the tool being sharpened, as well as any other foreign particles that may have accumulated on the face of the stone. In addition to this washing action of the surfaces of the abrading stones by the oil, the oil will at all times penetrate the pores of the stones and maintain them in the necessary lubricated condition to facilitate sharpening thereon. Also mounting a series of stones graduated as to fineness to swing in space, and maintaining a bath of penetrating oil in the lower portion of such space, through which the stones swing, eliminates the necessity of laying an individual stone upon a bench to pick up dirt and accumulate other foreign matter that would tend to fill up the pores, and maintains the stones available for immediate use by simply rotating the rotor to bring the desired stone to the topin substantially horizontal position.

A suitable cover made of the same material as the body of the receptacle may be applied to the receptacle when the stone is not in use. Also any steel particles or other foreign matter washed by the oil from the face of the stones will settle in the oil to the bottom of the receptacle. When a considerable quantity of such foreign matter or sediment has accumulated in the bottom of the receptacle the oil may be poured off, the sediment removed from the receptacle, the oil strained or otherwise cleaned, and returned to the receptacle, or fresh oil placed therein, as desired.

Having now described my invention, I claim:

1. In an edge tool sharpening device, a receptacle having end walls for containing a penetrating oil, a rotor rotatably mounted on its longitudinal axis substantially midway between the sides of said receptacle and in a position to permit complete rotation of the rotor in either direction, said rotor having a plurality of faces adapted to receive abrading stones of varying degrees of fineness, abrading stones bearing against the respective faces so as to present a sharpening surface when turned into substantially a horizontal position at the upper side of the rotor, supporting plates secured to the rotor at each end thereof and so arranged as to secure the stones in place thereon, said plates having trunnions rotatably supported in said end walls of said receptacle, the rotation of the rotor causing the penetrating oil in the receptacle to wash off from the faces of the stones any foreign matter and lubricating said faces while preventing them from becoming glazed or coated with material that would lessen their abrading efficiency.

2. In an edge tool sharpening device, a receptacle for containing a penetrating oil, a rotor rotatably mounted substantially midway between the end walls of the receptacle to permit rotation in a complete circle in either direction, said rotor having a plurality of longitudinally disposed stone receiving seats and end plates, abrading stones bearing against the respective seats andretained in operative position by said end plates engaging thereagainst, trunnions on said end plates rotatably supported in said end walls, and means carried by an end wall and adapted to engage an end plate for preventing rotation of said rotor and stones, said rotor when swung presenting any 'one of the stone faces for use, and also during Ill such swinging movement passing one or more of the stones through the oil in the receptacle to wash l I any Foreign particles irom i ace Hll'O and maintain said stone faces in clean lubricated condition and free from any glaze or other coating that would lessen their abrading efliciencyh 3. In an abrading device of the character described, a receptacle for containing a penetrating oil, a rotor rotatably and removably mounted in said receptacle and having a plurality of seats, each seat being adapted to receive an abrading stone, said stones when assembled on the rotor each occupying an angular position with relation to each of the other stones, said rotor being triangularly constructed to hold three equally spaced stones, each stone being of a different degree of coarseness from the others, and of a slightly greater length than the rotor, a clamping plate at each end of the rotor, fastening means for securing said clamping plates respectively to the end of the rotor with the abrading stones clamped therebetween, each of the stones when swung through the oil being washed clean of foreign matter and kept in an efficient condition.

4. In an abrading device of the character descibed, a receptacle for containing a penetrating oil, a rotor rotatably and removably mounted in said receptacle and having a plurality of seats, each seat being adapted to receive an abrading stone, said stones when assembled on the rotor each occupying an angular position with relation to each of the other stones, said rotor being triangularly constructed to hold three equally spaced stones, each stone being of a different degree of coarseness from the others, and of a slightly greater length than the rotor, a clamping plate at each end of the rotor, fastening means for securing said clamping plates respectively to the end of the rotor with the abrading stones clamped therebetween, each of the stones when swung through the oil being washed clean of foreign matter and kept in an efficient condition, and means for securing said rotor against rotation when desired.

5. An abrading device comprising a receptacle constructed and arranged to contain oil, a rotor mounted in said receptacle and comprising end members and intermediately positioned longitudinally extended stone-supporting means, said end members being movable relative to said stonesupporting means, abrading stones supported by said supporting means. means constructed and arranged to apply an adjustable pressure upon said end members so as to clamp the stones between said end members, said end members arranged and constructed to support the stone supporting members, and means for rotatively supporting the rotor by supporting said end members.

6. An abrading device comprising a receptacle constructed and arranged to contain an oil, a retor comprising a plurality of circumi erentianv spaced longitudinally disposed stone-supporting members and clamping plates at the ends thereof, a plurality of abrading stones supported on said supporting members and interposed between said clamping plates with their ends adjacent thereto, means for causing said clamping plates to apply a longitudinal clamping pressure upon the ends of all of said stones, and means carried by said plates for rotatably supporting said rotor within said receptacle for oiling and washing the stones when rotated in said receptacle.

7. In an edge tool sharpening device, a receptacle for containing a penetrating oil, a rotor rotatably mounted substantially midway between the end walls of the receptacle to permit rotation in a complete circle in either direction, said rotor having a plurality of longitudinally disposed stone receiving seats and supporting plates for rotatably supporting the rotor in the receptacle and for retaining abrading stones in operative position, abrading stones bearing against the respective seats and retained thereon by clamping engagement of said supporting plates, said rotor when swung presenting any one of the stone faces for use and the rotation of the rotor causing the penetrating oil in the receptacle to wash off from the faces of the stones any foreign matter and lubricating said faces while preventing them from becoming glazed or coated with material that would lessen their abrading efiiciency.

8. In an edge tool sharpening device, a receptacle for containing a penetrating oil, a rotor rotatably mounted substantially midway between the end walls of the receptacle to permit rotation in a complete circle in either direction, said rotor having a plurality of longitudinally disposed stone receiving seats and supporting plates for rotatably supporting the rotor in the receptacle and for retaining abrading stones in operative position, abrading stones bearing against the respective seats and retained thereon by clamping engagement of said supporting plates, said rotor when swung presenting any one of the stone faces for use and the rotation of the rotor causing the penetrating oil in the receptacle to wash off from the faces of the stones any foreign matter and lubricating said faces while preventing them from becoming glazed or coated with material that would lessen their abrading efficiency, and means adapted to engage one of said suppporting plates for preventing or permitting rotation of said rotor and stones.

JAKE MANFRED STIVERS.

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