US1339511A

US1339511A - Sharpener for feed-cutters

Info

Publication number: US1339511A
Application number: US296444A
Authority: US
Inventors: Charles A Holm
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-05-12
Filing date: 1919-05-12
Publication date: 1920-05-11
Anticipated expiration: 1937-05-11

Description

c. A. HoLM.`

SHARPENER FOR FEED CUTTERS. APPLICATION FILED MAY l2. 1919.

' 1,339,511. Patented May11,192o.

@A if E @CB/woef ad:

CHARLES A. HOLM, 0F TIGERTON, WISCONSIN.

SHARPENER FOR FEEDFCTTERS.

Specification ofLetters Patent.

Patented May 11, 1920.

Application med May 12, 1919. serial No. 296,444'.

To all 'whom t may concern:

Be` it known that l', CHA-ninas A. HoLM, a citizen of the United States, and resident of Tigerton, in the county of Shavvano andv State of lVi'sconsin, have invented certain new and useful Improvements in Sharpeners for Feed-Cutters;` and I do' hereby declare that the following is a full, clear and exact descriptionI thereof.

My invention relates to improvements in feed cutters or similarmachines having rotary commin-utirrg'blades, a-nd more particularly to means for sharpening. suclr bla'dbs during the normal operation of the machine' of which they form a part.

It is the principali object of this inventioni to provide sharpening means which may be readily associated with standard machines equipped Witl'r' rotary blades, or incorporated inA such machines being built.

A further object is toprovidea sharpening.

device which willc have a relatively universal yielding inovernei'it With respect to the cutting bladesso that excessive abra'ding will be prevented, the' blades being only sufficiently engagedto valways retain th'em at their maximum sharpness.

A still further object is to proved simply' constructed for an abrading member.

lVith these objects in view and others which Will become' apparent as the description'` proceeds, my invention resides in cer-y tain novel features of construction, combination andi arrangement of parts Which willbe hereinafter more particularly described and claimed and shown in the drawing, in which: v

Figure 1 represents a vertical longitudinal sectional view through thek discharge end portion of a feedt cutter or the like.

Fig. 2 is a relatively horizontal sectional vieW through the guard portion of a feed cutter showing the improved sharpening'. device in plan view, certain parts however, being' in section.y

rovide an imrol'ding. clamp Fig. is a detail elevational vievv, part-ly in section,of the means for supporting one end of the sharpeningdevice, and

Fig. L1 is'. a verticali sectional view of a modification'- of the invention", this form be'- ing adapted to bey associated with feed? cutters andiv the like Which have already been' placed in operation.A

Referring to the accompanying drawing, especially to Figs. 1,2 and 3 thereof, it Will beA noted' that l have depicted my invention in coperation' with a rotary knife 1 com prising radial. blade carrying arms 2 and slightly helical cutting blades Thisknife' 1 is mounted on a transverse drive shaft 11 located at the discharge en'dof the feed cutter indicated broadly by the character F and journa'led in bearings on the side barsV 5 thereof. The type of knife illustrated is' similar-to that used not only in feed cutters, but in many other machines,` one of Whose operations consists `in cutting or chopping lengths ofmaterialy into small bits, and therefore it Will be appreciated that the invention may be usedv on feed' cutters and suchy other machines.

The form of the invention` used in the construction in the' figures aboye referred to is designed to be incorporated in the machine during'its manufacture and is therefore carried by a specially constructed guard-hood@ It might be here .mentionedz that practically all standard feed cutters are provided with a guard-hood more or less' similar tothe hood 6 for' protecting lthe operator of the machine, such guard being located over' the discharge chute to shield the'knife during its rotation. The hood 6" has its bottom' and inner side open and is secured by lateral flanges 7 tothe ends of the side bars 5 by bolts or the like 8.

The opposite side Walls 9' of the hood are each provided With a slot 10 through which a pivot rod 11 extends. Each of the walls 9 adjacent the opening 10 therein is also provided with an outnmrdly projecting ear 12 throughwhich a' shank 113 of an adjustable bearing' 14 extends. Said' shanks are screw-threaded to receive adjusting nuts 15 disposed on each side of the ears 12.

The opposite ends of the pivot rodl 11 eX- tend through the openings in the adjusta- 4ble bearings 14, and it Willi be noted that these openings are considerably larger than the diameter of the rod and that resilient bushings 16 are disposed therein to form yieldable` bearings for said: rod. Nuts 17 on the opposite ends of the rod prevent the same from shifting longitudinally Within said' bushings.

The pivot rod 11 is adapted to support a pair of spaced like abrading bar clamps 18,

- as the knife is rotated.

each of which comprises a plate 19 having a pivot ear 20 disposed intermediate its ends for journally mounting the same on the rod; one end of the plate is shaped to form a clamp jaw 21 for coperation with a second clamp jaw 22. A bolt or the like 23 connects the two clamp jaws and retains them in coperative position, the jaw 22 having a laterally extending finger 24 engageable within a socket 25 on the plate 19 whereby the said jaw can more effectively perform its function.

The opposite end of the plate 19 from the jaw 21 is longitudinally slotted as at 26 to receive a spring rod 27 that extends from the top wall of the guard-hood 6 and carries a pair of expansile springs 28 and 29, one of which is located on each side of the plate 19. The plate is thus urged to remain in one position and when rocked in either direction about the pivot rod 11 it is returned to normal position when released.

The jaws of the two clamps 18 are designed to engage a pair of angle clamp bars 30 between which an elongated bar 31v of abrading material is disposed. This bar 31 is so adjusted with respect to the cutting edges of the blades 3 by means of the adjustable bearings 14 and adjusting nuts 27 on the ends of the spring rods 27 that it will be successively engaged by said blades i s hereinbefore set forth the abrading member has a` substantially universal yielding movement with respect to the blades 3 and from the foregoing described structure it will be obvious that this is procured as a result of the resilient mounting of the pivot rod 11 and the springs 28 and 29. The resilient bushings 16 for the pivot rod 11 allow the latter, and consequently all of the parts carried thereby, to yield away from the rotary knife whenever either of the blades 3 thereof strike against the bar 31; the pivotal connection of the clamp 18 with the pivot rod 11 permits the abrading member to be urged in the direction of movement of one of the blades 3 when engaged thereby.

I have attained similar movements yof the abrading bar 31 shown in Fig. 4 in a manner slightly different from that just de- The form ofthe invention illustrated in this figure is designed to be associated with a feed cutter or the like whichl has already been placed in operation, such machine being equipped with a standard guard hood 6 detachably secured to the ends of side bars 5 by means of bolts 8. Normally the end walls 9 of the hood 6 are in flush engagement with said ends of the side bars 5, but in mounting my invention on said hood, the latter is spaced from said ends of the side bars 5 by resilient washers 35. Likewise similar resilient washers 36 are disposed between the nuts 8 of Jhe (lnolts 8 and the attaching flanges of the Each of the clamps 18 used in this form of my invention consists of a plate 19 having a clamp jaw 21 and a socket 25. The coperating clamp jaw 22 of the first mentioned jaw has a finger 24" disposed in said socket 25, the abrading bar 31 being secured between said

jaws

21 and 22 and clamp bars 30 by bolts 23. The end of the plate 19 opposite the jaw 21 is apertured to receive the shank of an attaching bolt 37 that extends through an opening in one wall of the hood 6 adjacent its lower edge. A nut 38 threaded on said shank secures the blade to the hood, a resilient washer 39, however, being interposed between the wall of the hood and the plate 19 before applying said nut 38.

In this form of the invention the yielding of the abrading member 31 in the direction of travel of one of the blades 3 is permitted by the resiliency of the washers 39 while said bar is permitted to be urged away from the blades when struck thereby by the resilient washers 35 and 36. rIhe resilient nature of these washers, 35, 36 and 39 act similarly to the resilient bushings 16 andthe springs 28 and 29 and return the parts to normal position when engagement between the several blades 3 and the abrading member 31 no longer exists.

The preceding description setting forth the several forms of the invention readily shows that various changes may be made in my idea without departing from the important features thereof or sacrificing any of the advantages.

I claim:

1. In a device of the class described, a member adapted to be engaged by a movable cutting blade, and yieldable supporting means for the member, said member being urged in two different directions by the engagement of the blade.

2. In a device of the class described, a member adapted to be engaged by a movable cutting blade, and yieldable supporting means for the member, said member being simultaneously urged in two different directions by the engagement of the blade.

3. In a device of the class described, a member adapted to be engaged by a movable cutting blade, and yieldable supporting means for the member, said member being urged in a line of direction substantially tangentially'of the path of movement of the cutting blade and in a line of direction substantially at right angles to said path.

4. In a device of the class described, a member adapted to bey engaged by a rotary cutting blade, and yieldable supporting means for the member, said member being urged in a line of direction substantially tangentially of the path of movement of the cutting blade and in a line of direction substantially diametrically of said path.

5. In a device of the class described, a lever, a shiiftable pivot for the lever, and a contact member carried by the lever and adapted to be engaged by a cutting blade, said contact member defining orbital and rectilinear movement When engaged by the blade.

6. In a device of the class described, a support, a lever pivoted intermediate its ends, a yieldable bearing carried by the support and receiving the pivot of the lever, a spring engaged With one end of the lever and resisting orbital movement of said end in either direction, and a vcontact member on the other end of the lever adapted to be engaged by a cutting blade, said member being shir'ted orbitally and rectilinearly When engaged by the blade.

'7. A clamp comprising a supporting plate having a socket, one end of said plate formmg one Jaw member, a second Jaw member for coperation with the first, a finger eX- tending from the second jaw member and removably disposed in said socket, and a connecting member Joining the tWo jaw members for drawing the same together to 4 CHAS. A. HOLM.