US93631A - Improvement in planing-teeth for saws - Google Patents

Description

uniud/snm l parte entre GGTTLIEB MAULICK, TRENTON, NEW JERSEY,A-SSIGNOR T()l HIMSELF AND THOMAS P. MARSHALL, OF SAME PLACE.

Letters Patent No. 93,631, dated August-10, 1869; antedated August 6, 1869.

IMPROVEMENT IN PLANING--TEETH FOR SAWS.

The Schedule referred to in these Letters Patent and part of the same.

To all A'whom it nzwy concern 4roughened surfaces produced by the cutting-operation of the saw will be effectually smoothed by the action.

of the bits or planer-s.v

In order to enable others skilled inthe art to make and use my invention, I will now proceed to describe its construction and operation, reference being had-t0 the accompanying drawing, which forms a part vof this specitication, and in which- Figure 1, Sheet No. 1, is a face view of a vcircular saw, with my improvement;

Figure 2, a' section, drawn to anl enlarged scale, ony

the line 1 2, iig. 1;

Figure 3, a section on the line 3 4, iig. 1;

Figure 4, Sheet N o. 2, a side view of'part of the saw, drawn to an enlarged scale;

Figure 5, an edge view', looking inthe vdirection' of i the arrow, tig. 4;

Figure 6, a section on the curved line 5 6, fig. 4;

Figure 7, 'a section on the line 7 8, iig. 4; and

Figure 8, a detached view of part of the saw.

A is the blade of a circular saw, at regular distances round the edge of which are inserted detachable teeth a'.

Between the teeth, at regular intervals in the periphery of the saw-blade, are openings, iv, adapted for the recept-ion of L-shaped bits or planers B, one arm of each of which is dovetailed, to iit a similarlyshaped portion of the opening a', andthe rear edge of each bit is grooved, and the front edge of the dovetailed. portion is bevelled, to fit the V-shaped edge b'" and bevelled edge b* of the opening Owing to the inclination given to the edges b, and to the corresponding edges of the bits, the latter .can he inserted only from the side of the saw toward which the edge b4 is bevelled, and the edges of adjacent openings are bevelled in contrary directions, so

that adjacent bits must be inserted fronropposite sides i of the blade.

Each bit is secured in its place, after adjustment, by a rivet, c, and the front edge y of the outer portion of each bit is sharpened from one side, so as to form a cutting-edge and a channel, b", which extends across the face ofthe bit, and communicates with a channel,

a'", formed in the face of the saw, and extending'to the throat of the saw-tooth immediately at the rear of the bit, and the 'upper edge o the bit is sharpened, to form a cutting-edge, t, at right angles to the edge 1.

The outer portions of the bits or .planers are bent laterally, so that each cutting-edge y shall project slightly beyond that side of the saw-blade opposite to that from which the bit was inserted.

The edge z of eachopening x .is parallelvto the cut ting-edge y of the planer, which, however, is such 'a distance from the edge z as to form a nan'ow'throat or passage, a", `for the shavings which are planed, by the action of the bits, from the newly-cut surfaces, as the saw passes into the wood, the said surfaces being thus rendered smooth and even.

The shaviugs detached bythe planers pass through the recess b" and al, into the throats of the saw`teeth, from-which they are' discharged with the sawdust, the

-we'dging of' the blade, by the chips planed from the wood, being thus prevented.

Inasmuch as the edges z and the cutting-edges y of the planers are parallel to, and but a short distance from each other, the packing or indenting of the faces of the wood, which occurs when there is a large passage infront of the cuttingedge g, is prevented.

As the cutting-edges of the planers extend to, or

nearly to the edge of the saw-blade, they. will smooth the wood before the'two newly-cut surfaces have been separated sniiciently to interfere with the proper action of the bits, a result` which cannot be obtained when the planers are secured at a distance from the' edge of. the saw-blade, while the planers are confined much .more steadily in their position than would otherf wise be possible.

As the planers can only be inserted from the sideot' the blade opposite to that from which the cuttingedges project, each planer has a lateral 'bearing on the blade, so that it cannot be forced outward further from v the edge of the blade, thereby increasing the thickness of the shaving, and producing rough or uneven surfaces on the wood. I do not claim a cutter having a V-shaped recess in the rear edge, adapted to the sharpened edge of the opening iu the saw-blade; but

Y I claim as my invention, and desire to secure by Letters Patent- The arrangement oi' the planers B upon a saw-blade, Y as herein described.

eorrLinB MAULIGK. i

VVitnesses BENJ. Momsoiyr, WM. ELMORIsoN.

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