US744002A - Knife-grinding apparatus. - Google Patents

Description

' PATBNTBD Nov? 1o, RBELLB. KNIFE GRLNDING APPARATUS.

APPLIGATloN' FILED JULY z3, 1903.

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Attorneys UNITED I STATES atented November 10, 1903.

PATENT OFFICE.

KNIFE-GRINDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 744,002, dated November 10, 1903.

Original application filed March 21, 1903, Serial No. 148,939. Divided and this application filed July 23, 1903. Serial No. 166,635. (No model.)

To a/ZZ whom t may concer/'n.-

Be it known that I, PHILIAs BELLE, asubject of the King of Great Britain, residing at the city and district of Montreal, Province of Quebec, Canada, have invented certain new and useful Improvements in Knife-Grinding Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an apparatus described in my patent application, Serial No. l48,939,led March 2l, 1903-, of which this case is a division, such apparatus being an appliance for the purpose of continuouslygrinding the band-knife used in the machine described in that application and being applicable equally to any band-knife Wherever used.

My invention consists, broadly speaking, in an emery or other grinding WheelWhich is arranged in proximity to the edge of the bandknife and given a rapid rotation from any suitable source of power, as one of the pulleys or shafts of the machine acting in conjunction with an adjustable knife-block which supports the edge of the knife in the neighborhood of said grinding-wheel.

My invention also comprises other constructions and: combinations which will be hereinafter described, and ,more particularly pointed out in the claims.

My invention is illustrated in the accompanying drawings, in Which- Figure lis a sectional elevation, the section being taken centrally through the guide-block on the line l l of Fig. 2. Fig. 2 isa plan view thereof.l

The band-knife to which this is applied (designated 3) comprises an endless steel strap which passes over pulleys and is moved continuously in one direction, continuously cutting material brought against it ata point intermediate between the pulleys. It is not, however, intended to limit this invention to bandknives,as other knives-as,for instance,

a reciprocating knife formed of'a steel strap stretched in a frame--could'equally have my appliance applied to them, my main object being to keep the knife constantly sharp during its operation. It will be understood that a band-knife of this sort is ordinarily subject to lateral undulations or vibrations, which would ordinarily prevent a grinding-Wheel or the like from being evenly applied. Besides, unless guided, the knife would tend to escape from or be pushed back from the enlery- Wheel and the result` Would be to produce aV very uneven and ragged edge on the knife. Hence I provide primarily a guide-blockflat the point at which the grinding-Wheel is to be applied, this guide-block being iat and having a longitudinal deep slit 5 therein through which the knife passes. This guideblock is itself adjustably mounted in the bracket 6, which has a deep groove or recess 7',

in which the guide-block is tted to slide in a direction transverse to the knife, so as to adjust its position as it becomes ground in relation tothe grinding-wheel 7a, which latter is mounted on a shaft 8, turning in a journalbox 9, lixed upon the frame lO, and having a pulley ll, on which runs a belt l2, which gives the grinding-Wheel a rapid rotation.

The bracket 6, which supports the guideblock, has in its rear side threaded sockets, in which turn set-screws I3, which serve. as means for adjusting the position of the guideblock, and also the bracket should be provided with suitable meanssuch as a transverse rib 14, interlocking with a transverse groove l5 on the guide-block-to prevent the latter from moving longitudinally.

In my preferred form the guide-block is made sufficiently deep to receive the whole Width of the knife, as shown, and to this end there is formed at the center thereof adjacent to the emery-Wheel a gouge 16, by which the knife is surrounded on all sides Without interfering with the latter, and provision is made for the Wearing down of the knife. This though preferable is not an essential feature of my construction.

While I have shown in the accompanying drawings the preferred form of my invention, it will be understood that I do not limit myself to the precise form shown, for many of the details may be changed in form or position Without adectin'g the operativeness or utility of my invention, and I therefore reserve the right to make all such modilications as are included Within; the scope of the fol- IOO lowing claims or of mechanical equivalents to the structures set forth.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination, a band-knife adapted to be maintained in continuous longitudinal movement, grinding means adjacent to the edge thereof, a slotted guide-block coperating with said grinding means and through which said knife passes, and means foradj ustably shifting said guide-block transversely to said knife.

2. In combination, a band-knife adapted to be maintained in continuous longitudinal

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