Tag: William F. Kellett

No. 526,154 – Plane-Iron (William F. Kellett) (1894)

[paiddownloads id=”508″]526154

UNITED STATES PATENT OFFICE.

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WILLIAM F. KELLETT, OF CHICAGO, ILLINOIS.

PLANE-IRON.

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SPECIFICATION forming part of Letters Patent No. 526,154, dated September 18, 1894.
Application filed June 12, 1893. Serial No. 477,383. (No model.)

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To all whom it may concern:

Be it known that I, WILLIAM F. KELLETT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Plane-Irons; and I do declare the following to be 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, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The invention relates to that class of plane irons in which the cutter or blade is quite thin and is supported by a separate, rigid back plate.

The invention has for its object the improvement of the cap piece so as to more securely hold the blade and prevent its vibrations.

It consists in the use of a cap having a transverse rib between its edge and the main screw, the cap being rigid between the rib and the screw and elastically flexible below the rib and being so formed that when applied it must be depressed by the action of the wedge, ordinarily used in securing plane-irons, before the rib comes into contact with the blade.

In the accompanying drawings, Figure 1, is a longitudinal section of the plane iron on the line 1–1 of Fig. 2. Fig. 2, is a plan view of the iron. Fig. 3, is a perspective of the cap. Fig. 4 is a sectional view on the line 1–1 of Fig. 2, with the outline of the body of the plane in dotted lines.

The blade is shown at A. It is of finely tempered steel and is quite thin so that in sharpening there is no superfluous metal to cut away. This blade rests upon a back plate B, of softer metal but of greater thickness so as to be quite rigid. The back plate reaches approximately to the cutting end of the blade, and preferably has a slight rib as shown at h, across its end for contact with the blade so that the latter does not rest flatly against the surface of the back plate, the space between the two being so slight, however, that in drawing them together by means of the binding screw the flexure of the blade is scarcely perceptible. This feature is not new in this application.

The cap consists of a rigid body portion b, falling short of reaching the cutting edge of the blade A, by approximately one-half inch, and a flexible extension piece a, secured firmly to the under side and at the lower end of the body portion by the rivets e, and reaching approximately to the end of the blade. This cap extension is bowed outwardly from the end of the body portion, its lower edge being curved downwardly so as to cross the plane of its upper end. The body portion, b, of the cap is provided with the ordinary screw threaded aperture, c’, within which is set the main screw, c, which extends through longitudinal slots in the blade A, and back plate B, its head binding against the under surface of the back plate B, so as to draw the cap down upon the blade A, interposed between the cap and the backing piece. When the three members are first brought together the cap touches the blade only at its extreme ends. The main screw is turned up so as to draw them firmly together but not sufficiently to bring the rib, d, into contact with the blade. When the iron is adjusted to the plane H and the wedge K driven to its place the cap is still further depressed so as to bring the rib d, firmly against the blade A. It is important that the cap bear firmly against the lower end of the blade. This is certainly attained only by depending upon the wedge K to depress the cap at the rib, for were the main screw to be relied upon for this purpose there would be danger of bowing the cap downwardly between the rib and the screw, thereby causing its lower end to tilt upwardly, at least to relieve the pressure of the flexible end upon the blade. Heretofore it has been usual to secure a blade of this character by a cap having no bearing between the main screw and its edge. The result has been that the blade has, particularly when used on hard wood, bowed upwardly from the back plate; that is, the end of the back plate has served as a fulcrum upon which it has turned. The stiffness and elasticity of the blade have brought it back quickly to its normal form, and as a result of the conflicting action — the pressure at the edge tending to bow the blade, its stiffness and elasticity tending to preserve its original form — the blade has been caused to vibrate rapidly, to the manifest detriment of the tool.

By the construction herein shown and described an unyielding, intermediate point, or line of bearing, is secured at d, sufficiently removed from the edge of the blade to wholly counteract this tendency, and a cap is provided which under all conditions holds the blade immovably to its seat upon the back plate. At fand f’, are shown a bolt and nut for securing the upper end of the blade to the back plate in the usual manner.

While I show and describe the cap as of two pieces secured together it is obvious that it may be of a single piece provided it meet the conditions of having a firm transverse rib between its edge and the main screw, and is substantially inflexible between this rib and the main screw, and flexible and elastic below the rib, and has its flexible portion curved so that its edge falls below the rib, thereby insuring a close joint between the edge of the cap and the blade.

I am aware that it is known to secure a bearing above the edge of the cap by the use of a supplemental flexible cap interposed between the rigid cap and the blade, but such construction does not meet the requirement for a firm bearing upon the blade to prevent its vibration.

I claim as my invention —

l. In a plane iron, the combination with a thin cutting blade, A, of a rigid back plate, B, for supporting the blade, and a cap for covering the blade, such cap comprising a rigid portion, b, having bearings at its upper and lower ends upon the blade, and a flexible extension, a, adapted to bear upon the blade contiguous to its cutting edge, substantially as described and forthe purpose specified.

2. The combination in a plane iron, with a thin cutting blade and a rigid back plate for carrying the same, of a cap piece comprising a rigid portion b, and an elastic extension piece a, secured to the under side of the lower end of the portion b; and being bowed outwardly, its extreme end normally crossing the plane of its inner or attached end, and being adapted to bear against the blade contiguous to its cutting edge, substantially as described and for the purpose specified.

3. The combination in a plane iron, with a thin cutting blade and ia rigid back plate for carrying the same, of a cap piece having a transverse rib and being elastic below this rib and rigid above it and being so curved that when applied to the blade the rib does not touch the blade until the cap is compressed, substantially as described and for the purpose specified.

4. In a plane iron, the combination of a rigid back plate, a flexible cutting blade carried by the back plate, and a cap piece having its lower end flexible and its upper portion rigid and having a transverse rib at the juncture of the flexible and rigid portions and being adapted to bear upon the blade, whereby positive contact is insured between the blade and the back plate directly below the rib when tl1e iron is adjusted to the plane, substantially as described and for the purpose specified.

In testimony whereof I affix my signaturein presence of two witnesses.

WILLIAM F. KELLETT.

Witnesses:
T. A. KELLETT,
SAMUEL LEGER.

No. 305,393 – Plane-Bit (William F. Kellett) (1884)

[paiddownloads id=”370″]305393

UNITED STATES PATENT OFFICE.

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WILLIAM F. KELLETT, OF CHICAGO, ILLINOIS.

PLANE-BIT.

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SPECIFICATION forming part of Letters Patent No. 305,393, dated September 16, 1884.
Application filed May 26, 1884. (No model.)

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To all whom it may concern:

Be it known that I, WILLIAM F. KELLETT, a citizen of the United States, and residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Plane-Bits, which is fully set forth in the following specification, reference being had to the accompanying drawings, in which —

Figure 1 is a plan view of a plane-bit containing my iniprovement with the base A uppermost. Fig. 2 is a plan view of the same with the cap B uppermost. Fig. 3 is a plan view of the base A. Fig. 4 is a plan view of the chisel or planing-knife. Fig. 5 is a detail section of same on line x x, Fig. 4. Fig. 6 is a detail section taken on line y y, Fig. 2. Fig.
7 is a section taken on line z z, Fig. 2.

My improvement relates to that class of planing-tools known as “hand-planes,” and particularly to the parts known as the “plane irons.”

In the drawings, A is the base or holder; B, the cap; C, the chisel or planing-knife; D and E, set-screws.

In the general manufacture of planes by the old method the base or holder A is made of expensive steel, because it also has to serve the purpose of the chisel or planing-knife, and it is necessarily quite heavy in order to give it the requisite rigidity or stiffness.

In the manufacture of a plane containing my improvement the base A and cap B can be made of iron or cheap steel inasmuch as they carry no knife-edges and perform no other function than that of a clamp or vise which holds the chisel C in proper adjustment to the rest of the plane. The chisel C is made of the best quality of saw-plate or other line sheet-steel, and is fastened to the base or holder A by any proper device. I have provided for this purpose the set-screw D and nut G, and set-screw E, and cap B. The set-screw D passes through a suitable hole, w, in the chisel C, and runs in the slot n in the holder or base A. The set-screw E plays in the slot o of the base A, and passing through the slot s in the chisel C screws in the threaded hole r in the cap B.

When it is desired to sharpen. the chisel, the set-screw E and the nut G are released, and the chisel C is moved forward. When the sharpening has been completed, the chisel is moved into proper adjustment and the set-screws are tightened.

The chisel C is made of thin non-self-supporting material, and could not be used alone, but must be supported by some means similar to the systems of irons which I use. It is designed to perform no function save that of a chisel or cutter. The lower end of the base is lipped or turned up, and the lower end of the cap is lipped or turned down, so as to come together and make a snug joint in which to hold the lower end of the chisel.

In putting the parts together of course it is understood that the cap B is uppermost when the chisel is in the plane, and the chisel C and base A would be placed accordingly for the purpose of best fulfilling their several functions. In practice, I so adjust the chisel C relatively to the base A that the bevel of the cutting-edge of the chisel forms a continuous surface with the bevel of the lower edge of the base, this being the most effective position of the parts.

Planes thus made will be less expensive and more easily adjusted and sharpened than those made after the old fashion. When the plane-bit is being set in the plane it is customary to strike the upper end of the base A with a hammer for the purpose of driving down the chisel. I have therefore provided a cap, K, which is made somewhat in the shape of a greatly-broadened old-fashioned wooden clothes-pin, and which, coming down over the end of the base A is riveted to it by the rivets a a. This cap receives the hammer-blows, and thus protects the end which without this protection would be upset and battered down. The cap can be easily removed and replaced at trifling expense. This cap may be applied to plane-irons made in the old way.

I am aware of the patent to Seely and Locke, No. 24,335, June 7, 1859, and do not wish to be understood as claiming the construction therein shown and described; nor do I wish to be understood as claiming, broadly, a plane-bit clamped between a cap and base or back plate, as said construction is old.

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

1. The combination, with the base plate having the thin steel chisel adjustably connected therewith, the adjacent surfaces of the two being plane surfaces, of the cap connected with the base-plate by a clamp-screw to clamp the chisel rigidly against the back plate, substantially as and for the purposes specified.

2. The combination, with the slotted base-plate, of the chisel connected therewith by a clamp-screw at its upper end, whereby the chisel may be adjusted longitudinally on the base-plate, and of the cap connected with the base-plate by a clamp-screw, whereby the chisel may be firmly clamped against the base-plate, when so adjusted, substantially as and for the purposes specified.

3. The cornbination, with the base A, chisel C, and cap B, provided with the slots o n s, and holes r w, of the set-screw E, and set-screw D, and nut G, substantially as and for the purposes set forth.

4. The combination, with the base A, of the cap K, substantially as and for the purposes set forth.

WM. F. KELLETT.

Witnesses:
G. E. FAULKNER,
LEONARD WATSON.