US1608349A

US1608349A - Plane

Info

Publication number: US1608349A
Application number: US605011A
Authority: US
Inventors: Thomas T Tvedt
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-12-05
Filing date: 1922-12-05
Publication date: 1926-11-23
Anticipated expiration: 1943-11-23

Description

Nov; 23 1926.

T. T. TVEDT .PLANE Filed Dec.

INVENTOR T\\O\\\C-$T T iech' ATTORNEYS Patented Nov. 23, 1926. v

UNITED STATEEt THOMAS T. 'IVEDT, OF BROOKLYN, NE! YGRK.

PLANE.

Application filed December 5, 1822. Serial No. 805,011.

Thisinvention relates to planes of the general character disclosed in a1 plicants application Serial Number 516,908, filed November 22, 1921. The plane shown and described in said application comprises a small thin blade mounted so that it may be quickly and easily removed from the plane and discarded when it becomes dull and a sharp blade inserted in its place.

One object of the present invention is to produce a novel, improved, and simplified construction for holding the blade and clamping the same in place in the stock.

Another object of the invention is the provision in a plane of a single bit or plate designed to replace the back plate and blade of conventional plane constructions. A still further object is the provision in a plate of a blade having a detachable edge portion associated therewith so that the elements may be inserted in the plane as a unit.

With this and other objects in view, the invention comprises the novel and improved constructions, arrangements and combinations of parts hereinafter described and particularly pointed out in the claims, the advantages of which will be readily understood and appreciated by those skilled in the art.

The invention will be clearly understood from the accompanying drawings illustrating a plane embodying the invention in its preferred form and the following detailed description of the construction therein shown.

In the drawings Fig. 1 is a view in longitudinal vertical section of a plane embodying the invention;

Fig. 2 is a detail face view of the iron with a blade applied thereto;

Fig. 3 is a perspective view of the iron and blade; and

Fig. 4 is a perspective view of the thin removable blade.

In the embodiment of the invention illustrated in the drawings, the plane comprises a stock 2 having a stud 4 at its forward end to be grasped by the operator in operating the plane and formed with an opening 6 through which the blade projects below the lower surface of the stock. The small thin removable blade is indicated at 8 and is mounted on the lower end of an iron indicated at 10 which is supported on the stock for sliding adjustment at an angle to the lower surface of the stock.

In the present embodiment of the invention the blade is mounted on the lower surface of the iron so that when the iron is placed in position in the stock the blade is located between an inclined surface 12 formed on the stock and the iron. The blade is clamped between the stock and the iron by forcing the forward end of the iron toward the stock. The plane illustrated in the drawing is especially adapted for use as a block plane to plane across the grain of the wood. It will be noted that each edge of the blade is formed by a single bevel extending from one face of the blade toward the other face thereof. To enable the blade to cut more elliciently and reliably across the grain of the wood-the blade is placed on the iron so that the bevel on its forward cutting edge will be uppermost. The character of the blade which is preferably employed is such that it has considerable flexibility and therefore requires support adjacent its cutting edge when it is in operation. In the construction shown. the blade is supported 011 its rear side adjacent its cutting edge by the edge of the stock at the lower end of the inclined surface 12 and the blade is supported on its forward side adjacent this edge by the lower end of the iron.

The blade is located in a predetermined and definite position with relation to the forward end of the iron preferably by means of pins 14- mounted in the iron and arranged to engage in openings 16 formed in the blade, said openings being located centrally of the blade so that either edge will be located with relation to the iron by engagement of the pins in said openings. The blade is thus mounted on the iron so that it may be readily reversed or removed from the plane and the operating cutting edge will be located in a predetermined and definite position with relation to the forward end of the iron by engagement of'the pins in the openings in the blade. To hold the blade in position on the iron while the iron is placed in or removed from the stock, a spring plate 16 is secured to the iron and is arranged so that the rear portion of the blade may be inserted beneath the same when the blade is applied to the iron.

The rear end of the iron is supported on a slide block 18 mounted to slide on an inclined guideway formed at the upper end of an up right 20 on the stock. This slide bloc-k carries a pin 22 which engages in an opening 24 ion in the iron. The slide block 18 is adjusted to adjust the iron with relation to the stock by means of a differential screw 26, the lower portion of which is threaded into a projecion on the slide block and the upper portion of which is threaded into the upright 20, this screw carrying a hand wheel 28. The portion of the screw which is threaded into the block 18 has a different pitch than that of the portion which is threaded into the upright 20 and by properly proportioning the pitches of the different parts of the screw, any desired degree of fineness of adjustment of the iron may be secured.

The forward end of the iron is forced toward the stool: to clamp the blade between the iron and the stock by means of a clamping plate 30, the forward portion of which is located beneath a transverse pin 32 mounted on the stock and the forward end of which is arranged to engage the iron as shown in Fig. 1. The rear end of the clamping plate is moved outwardly to force the forward end thereof against the iron by means of an adjusting screw 34 threaded through said Having explained the nature and object of the invention and having specifically described a plane embodying the invention in its preferred form, what is claimed is: V

l. A single iron or plane bit or blade and a thin detachable portion constituting the cutting edge of said bit or blade and having a bevel to form such edge and the main bit or bevel having a like bevel so that the said bit or blade may be clamped to the bit stock and the detachable portion clamped between the main bit or blade and the plane stock with the bevel face upward.

2. A single iron or plane bit or blade and a thin detachable portion constituting the cutting edge of said bit or blade and having a bevel to form such edge, the bit being provided with a similar bevel whereby the said blade may be clamped tothe bit stool; with the detachable portion disposed between face upward and means on said bit engage able with said detachable portion for locating said portion in a predetermined definite position.

Signed at New York, N. Y., this 2nd day of December, 1922.

THOMAS T. TVEDT.

the main bit and the plane stock the bevel