USRE13628E - Ctjtlert-gr - Google Patents

Description

H. E. SWEET.

GUTLERY GRINDER.

APPLICATION FILED Amm, 1912.

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HQMER E. SWEET, OF PORTLAND, OREGON, ASSIGNOR T0 THE MODERN MANUFAC- 'i `4 TUBING' QOMPANY, A COiRPOBfATION OF OREGON.

GUTLEBq'Y-GBINDEB.

Original No. 999,707, ,dated January 12,

vCutlery-Grinders, of which the following is a specification.

IThis invention relates to cutlery grinders, and one lof the principal objects of the same is to provide av simple and eiiicient machine of comparatively few pai'tswhieh may tbe used tby an unskilled person for` grinding knives, scissors. or other cutlery.

Another object ofmy invention is toprovide a cutlerygrinder which may beeither operableby hand' orv by V n ieans of a motor andwhich will hold,thebladetofbe ground at any desired angle to the grinding sur-face liOn `lirder to :give the desired Vbevel to the la e.

` Still another object of the inventionlis to;

provide a simple and ,eiifcient machine for grinding cutlery .Which maybe adjusted.

to hold a at any required'angle to the grinding surface and which will firmly hold the-bladeiin such-:adjusted position and permit the operator .to Withdraw the-blade at any time without changing the lbevell whenreinsei't-ing the Iknife or other tool.

These and other objects may be attained by means of the construction illustratedin the accompanying drawings. n 'A Figure 1 is a side elevation -and partial section of a cutlery grinder made in accordance Vwith my invention; Fig. 'Qfi's a front elevation of the same; Figi?) is a topA plan view of the work holder.

Referring to the drawing for a more specific description of my invention, the numeral 1 designates the machine frame comprising a base arm la, through which a binding screw 2 passes and a table 3 and an upright arm 4 for supporting the operative mechanism. This frame is adapted to be clamped to a table or other support by means of the binding screw 2.

Mounted in the upper end of the arm 4 is a shaft 5 to one end of which a small gear wheel 6 is attached, said shaft extending through a suitable journal bearing 7, and secured to the other end of said shaft is a grind stone 8 formed in the shape of a ring Specification ofBeissuedIietters:Patent Reissued 001;, 14C, v1913.

1399, `Serial No. 433,725. Application for reissue led April 8, 1912. ySeriallo..(589,434.

provided with an internal angular iiange 9, which is 'clamped between a disk or plate 1,0 and a face yplate 11 by means of a screw 12ap`pliedto the threaded end of the shaft 5.

The main shaft 13 is journaled in the upright yportion 4t of the frame at one end and inla bracket 4a rising from the opposite portion of the table 3.

Referring now to' Figs. 1, 2 and 3, the work holdervissliown as mounted upon the main shaft 13, said work holder comprisifnggthe two ylugs 14 and 15, through which the shaft 13 freely passes, said lugs having each a groove 16 therein to receive the head 17 of a set-screw 18 itted linto a threaded opening inthe table 8 andadaptedto hold the work holderin an upright' position on said shaft by extending loos-ely into said groove 16 of the lugs 14 and 15'. This vscrew" may also'be adjusted to secure the Workholder in place. Extendingvupwardly at an inclination'is the work holding arm 19, said yarm h ,avinglan upwardly extending supportingr member 20, said member 20 having va slot 21 therein through which a spring 22 extends,` said spring being secured at 23 tothe outer eind of the table 3.

",For'adjusting t-heb'ack'portion of a knife blade 'to give the required bevel to said blade While being Uround"1 utilize an adjustable gage 26 whaeh is adjusted by means oftheset-sclrew 27,",vshichv passes throughv a slot` 2 8' in `a lug formed upon the work holdenasshown more particularly inligs l'aiid 2.y

Secured to the 'frame 1by means of the shaft'gis is the main grinding gear 29 which in'eslies with the small gear 6 and is provided with a suitable crank 30 provided with a handle 31.

The operation of my invention thus far described may be briefly set forth as follows: A knife or blade, a, is placed in the machine, as shown in Fig. 1, and held by one hand, while the other hand may be used for turn ing the crank 30. The bevel at which it. may be desired to grind the blade, a, may be attained by means of the gage 26. It will be understood that the free movement of the work holder on the shaft 13 allows said holder to adapt itself to any thickness'or width of the knife, said holder being spring controlled, and adapted to impose the force of the spring 22 against the blade being ground. lNhen the grind stone is rotated the operator moves the knife back and forth and may withdraw the same whenever required without danger of altering the degree of bevel to be ground upon the blade. The curved spring 24 and the spring-22 hold a scissors blade, Z9, in the proper position for being ground. The force of the spring 22 against the scissors blade, o, holds the latter yieldingly against the grind stone. The same arrangement, and the fact that the grinding is done against the side face of the grind stone, also provides for the automatic feeding of the scissors blade in the grinding operation; for the friction of the grind stone, in its revolution, against the scissors blade will carry the latter along its entire length, thus automatically feeding while grinding the same.

F rom the foregoing it will be obvious that a grinding machine made in accordance with my invention will .be found useful in households, hotels and other places where cutlery may be ground by unskilled persons, and that the machine may be manufactured and sold at a low price and will operate quickly and efficiently for its purpose.

I claim:

l. A cutlery grinding machine comprising a frame, means for holding said frame rigidly to a support, a grind stone, a shaft upon which said grind stone is secured, a gear Wheel on said shaft, a gear wheel on said frame meshing with the gear wheel on the grind stone shaft, a work holder, an arm for bearing against the blade to be ground, an adjustablegage and a set screw for securing the work holder in adjusted position.

2. ln a machine of the character described, and in combination with a rotary grind stone, a work holder comprising an inclined arm to bear against the blade to be ground, an outwardly extending slotted member, and a spring secured to the frame of the machine and extending through said slotted member,

and a set screw for securing said work holder in position.

3. In a machine of the character described, and in combination with a rotary grind stone, a work holder mounted upon a shaft and provided with grooved lugs, a set screw mounted in the frame and having a head to engage the grooves in the lugs, an upwardly inclined arm for bearing against the blade to be ground, a lug 33 adapted to throw the knife to the proper bevel against the stone, an outwardly extending holding member having a slot therein, a spring secured to the frame of the machine and eX- tending through said slot, and a curved spi-in01 secured to said slotted member.

4. In a machine of the character described, and in combination with a rotary grind stone, a work holder, means for securing said work holder in adjusted positions, an inclined arm on said lwork holder, an outwardly extending supporting member provided vvith a slot, a spring secured to Athe frame of the machine and extending through said slot and a curved spring blade holder secured to said supporting member and adapted to hold a scissors blade up to a grind stone, substantially as described.

5. A cutlery grinding machine comprising a frame, means for holding said frame rigidly to a support, a grind-stone, a shaft upon which said grind-stone is secured, a gear wheel on said shaft, a gear Wheel on said frame meshing with the gear wheel on the grindestone shaft, a work-holder, a forked spring arm bearing against the blade to be ground for holding it on the workholder, and another spring arm also bearing on the blade between the members of the forked spring arm for holding the blade against the grind-stone.

HoMEn E, sWEET.

Witnesses:

H. A. Coonn, CnciL LONG.`

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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