US1735310A - Cutter - Google Patents

Description

Nov. 12', 1929. c. J. ANDERSON 1,735,310

CUTTER Filed April 9, 1928 mum, v mum Patented Nov. 12, 1929 UNITED STATES- PATENT oFFIc CARL J'. ANDERSON, OF CHICAGO, ILLINOIS, ASSIGNDR. OF FIFTY-ONE AND TWO-THIRDS PER CENT TO ERIK BOB-G AND FIFTEEN PER CENT TO CARL U. JOHANSON, BOTH OF CHICAGO, ILLINOIS Application filed April 9,

The invention relates generally to cutters and more particularly to high speed power driven cutters which are adapted for cutting hard wood across the grain to produce a uni formly smooth surface thereon.

Such cutters are especially useful for resurfacing butchers blocks, clickers blocks or the like which have become uneven or soiled. It is well known that clickers blocks are made from exceptionally hard wood and that unless the upper surface of these blocks is kept comparatively smooth, the rigid dies which are used thereon will be broken or distorted.

The establishments which ordinarily use cutters of this type are not, a general rule, equipped for regrinding the cutting elements used and it is, therefore, important that the cutter be of such a character that the edges of the cutting element will withstand a maximum amount of use before it is necessary to resharpen or replace the elements.

The primary object of the invention is to produce a novel cutter embodying means operable to prolong the life of the cutting edges thereon.

Another object is to provide a cutter adapted to be driven atv hi gh speeds and embodying resilient means interposed between the driving means and the cutting; elements so as to cushion the action of the cutting elements and thereby prolong the usefulness thereof. p

Another object is to provide a cutter of this character which is adapted to use cutting elements which may be cheaply formed and readily replaced in the cutter.

Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawings, in which:

Figure 1 is a vertical central sectional view of a cutter embodying the preferred form of the invention.

Fig. 2 is a bottom plan View of the cutter shown in Figure 11 While the invention is susceptible of various modifications and alternative constructions, 1 have shown in the drawings and will CUTTER 192s. Serial no; .asssva herein describe in detail the preferred embodiment, but it is to be understood that I do not thereby intend to limit the invention to the specific form disclosed; but intend to cover all modifications and alternative constructions falling'within the spirit and scope of the invention as expressedin the appended claims. I

It is contemplated that the cutter herein shown will be mounted in a supporting casing which. contains the driving means therefor and which serves to guide the cutter in a desired relation to the surface upon which the cutter operates. The particular supporting casing does not form part of the present invention and, therefore, is not illustrated nor described herein.

In the embodiment of the invention chosen for disclosure herein, the cutter assembly is mounted on a shaft 5 which is adapted to be rota-tably supported in a vertical position in such a casing. A supporting member in the form of a disk 6 is mounted on the shaft 5 and is preferably provided with an integral hub portion 7 which surrounds the shaft and serves to support the disk rigidly in perpendicular relation to the shaft. To secure the disk to the shaft for rotationtherewith a pin 8 is provided which extends through the shaft 5 and the hub portion 7 of the disk.

A cylindrical member 9 is secured in concentric relation with the shaft to the outer edge oft-he disk 6 by means of screws 10 which extend through the disk and engage the walls of the cylinder. The cylinder 9 extends downwardly from the disk 6 to a point adjacent the lower end of the shaft 5 and the inner edge thereof is annularly recessed at 12 so as to snugly receive the outer edges of a disk'13 which is rotatably supported in fixed axial position at the lower end of the shafto. This disk 13 is preferably provided with a suitable bearing 14 which serves to maintain the disk in perpendicular relation to the shaft 5 and which also serves to prevent wear and the wabbling of the disk which would result from such wear. Atits upper side the disk 13 abut-s a shoulder 16 formed in the cylinder 9 which prevents upward displacement of the disk along the shaft. The disk 13 is'held against downward displacement along the shaft by means of a collar 17 which fits about'the lower end of the shaft in abutment with the outer surface of the disk 13 and whichcis secured on the shaft 5 by means of the pin 18 which e1;- tends through the collar and the shaft.

A plurality of lugs 20 are formed in similar positions at angularly spaced intervals on the bottom surface of the disk 13 to which suitable cuttin elements 21 may be secured by means of tap screws 22 which extend through the cutting elements 21 and engage the lugs. It will be apparent that the cutting elements 21 are simple in form so that they may be cheaply manufactured and since they aresecured on the exterior of the cutter assembly, they may be readily removed for resharpening or replacement.

To provide for a resilient driving connection between the driving shaft 5 and the cut ter supporting disk 13, a coiled torsion spring 25 is positioned within the cylinder 9 so that its opposite ends 26 engage suitable apertures 2'? formed in the disks 6 and 18 near the outer 6Cl9QS thereof.

It Will be apparent that by reason of the resilient driving connection provided between the driving means and the cutting elements, the cutting edges of the elements will not be driven positively against exceptionally tough fibres or other obstructions in the wood surfaces and that the dulling efiect of such tough fibres will, therefore, be reduced.

It will also be apparent that the invention provides a cutter which is adapted to use cutter blades which may be cheaply formed and readily removed from the cutter for replacement or resharpenin-g.

I claim as my invention:

1. A cutter having, in combination, a shaft adapted to be rotatably supported in a ver tical position, a disk supported on said shaft for rotation therewith, a cylindrical member supported by and extending downwardly from the outer edge of said dish, a second disk having cutting means on the lower side thereof, said dislrbeing rotatably supported on said shaft and engaging the lower end of said cylinder to prevent upward movement of said disk along said shaft, means for securing said disk against downward movement along the said shaft, and a coiled torsion spring concentrically mounted within said cylinder with its opposite ends engaging said disks adjacent the outer edges thereof.

2. A cutter comprising, in combination, a shaft adapted to be rotatably supported in a vertical position, a tool supporting member rotatably supported in fixed axial position adjacent the lower end of said shaft, a plurality of lugs on the bottom side of said memher, a plurality of cutting elements onesecured to each of said lugs, and means forming a resilient driving connection between said member and said shaft.

3. A cutter assembly comprising, in combination, a rotatable shaft, a cutter mounted on said shaft and rotatable relatively thereto, and resilient means interposed between said shaft and said cutter to transmit a motion of said shaft to said cutter.

, t e cutter comprising, in combination, a shaft adapted to be rotatably supported in a vertical position, 'a tool holder in fixed axial position on said shaft and rotatable relatively thereto, a cutting tool removably secured on said holder, and a coiled torsion spring surrounding said shaft secured one end to said holder and at its other end to said shaft.

In testimony whereof, I have hereunto affixed my signature.

7 CARL J. ANDERSON.

Images