US2651340A - Carpenter hand plane - Google Patents

Description

Sept. 8, 1953 L. c. LUMETTA ETAL CARPENTER HAND PLANE Filed July 28, 1 949 INVENTORS mmri/va' c: {MHZ/7,4

James: .5. 40444770 .q'raazvsr Patented Sept. 8, 1953 Uni-Tao srArss PATENT orFi-cs CARPENTER PLANE Lawrence C. Lumetta and Samuel S. Lumstta, Detroit, Mich,

Application July 28, 1949,, Serial N0. 107,214

.3 Claims.

This invention relates surfacing planes and in particular to improvements in hand planes for carpenters.

Carpenter planes have been employed heretofore over a long period to remove small areas or amounts of wood or other material. However, the several devices of the prior art have not proven entirely satisfactory inasmuch as they are complicated in design and construction, ex pensive to manufacture, diflicult to properly adjust for use, and ciog easily.

With the foregoing in view, the primary object of the invention is to provide a plane which is simple in design and construction, inexpensive to manufacture, easy "to properly adjust for use, and which will not clog.

An object of the invention is to provide a plane of a minimum number of parts, namely, three parts: a body, a blade. and a set screw. 7

An object of the invention isto providea plane capable of cutting coextensively with the sides of the plane body.

.An object of the invention is-to provide .a plane capable of cutting any easily adjusted distance sidewise outwardly beyond either side of the 7 plane body.

An object of the invention is to provide a plane capable of cutting sidewise inwardly a regnlatable and variable distance inside either of the sides of the plane body.

An object of the invention is to provide a plane equipped with a blade capable of adjustment for cutting in either direction of plane movement by either a pushing or pulling action.

An object of the invention is to provide a blade easily settable as to depth of out which is positively easily securable in the adjusted position.

An object of the invention is to provide a blade positioned a comparatively large distance away from the leading surface of the plane with the space being large enough to permit the ready displacement of shavings so that the shavings cannot clog the cutting area of the blade or become lodged between the leading plane surface and the blade.

These and other objects of the invention will become apparent by reference to the following description of a carpenters plane embodying the invention taken in connection with the accompanying drawing in which:

Fig. 1 is a side elevational view of a plane embodying the invention.

Fig. 2 is a top plan view of the plane of Fig. 1.

Fi 3 is a cross-sectional view of Fig. 1 taken on the line 33 thereof.

r face 12 of the body Fig. 4 is a cross-sectional on the line 4-4 thereof.

Fig. 5 is a partial view similar to Fig. 2 showing the blade in adjusted position extending sidewise outwardly of the plane; and

Fig. 6 is a. perspective view of the blade.

Referring now'to the drawing wherein like numerals refer to like and corresponding parts throughout the several views, the carpenters plane disclosed therein to illustrate the invention comprises a plane body I equipped with an integral blade receiving housing or chamber 11 interrupted'or slotted by the work contacting sure M as a chord toform an opening in the work contacting surface 12 to permit the protrusion of the cutting edge of a blade below the surface l2, an imperiora-te arouate blade 14 rotatably nesting in the housing or chamber "I l-so as to be capable of projecting its cutting edge below thes-urface I2, a threaded apertureib in the body 1 0, and a set-screw t threaded in the aperture l 5 and adapted to exert force on the blade so as to wedge the blade [4 between the set-screw 16 and the body in to secure the blade 14 in adjusted position relative to' the'bodylll."

'More particularly, "the body comprises a one-piece metal casting with integral hand-grips including a rear platen 20 and a front platen 2i spaced apart by a space 22 so as to provide open area for the protrusion of a blades cutting edge therebetween, a bridge 23 rigidly uniting the platens 20and 2| having a cylindrical interior chamber ll completely open at either side of the bridge 23 with the chamber II communicating with the space 22, and a threaded aperture 15 at the top of the bridge 23.

The blade l4 comprises an arcuate, imperforate member I4 having cutting edges 24 and 25 ground thereon sidewise slidably insertable into the view of Fig. 1 taken chamber H with the blade I4 being nearly circumferentially co-extensive with the walls of the bridge 23 defining the chamber l I with the blade l4 being rotatable in either direction relative to the body In to position either the cutting edge 24 or the cutting edge 25 in cutting position so that the cutting direction can be either forward or rearward with a pushing or drawing action respectively and with the blade l4 being laterally positionable relative to the body It] at points at, within, or beyond the lateral extent of the body 10.

The set screw 16 comprises a threaded portion 26 threadable in the threaded aperture [5 of the body I0 and a knurled hand portion 21 facilitating manual tightening and loosening of the end of the set screw l6 against the blade I4; tightening the set screw 16 against the blade l4 reacts on the body I at the top of the bridge 23 and exerts downward force on the blade M which is transmitted to areas of the blade 14 adjacent the cutting edges 24' and 25 with the transmitted force being resisted by the adjacent areas of the bridge 23 and/or platens 20 and 2! thereby placing the blade H in pressure contact with the body l0 immediately adjacent the cutting edges 24 and 25 thereof. This not only secures the blade l4 but also prevents vibration of the bladeor chat-1 tering" in use. cially Figs. 2 and 5, the action of the set screw As seen in the drawing, espe I6 is the same regardless of the relative lateral position of the blade I4 to the body [0.

In operation, the user setsthe blade M as to extent of protrusion of either cutting edge 24 or 25 below the surface I! and as to relative lateral position to the body l0 and then tightens the set screw Hi. The plane is then ready for use. No adjusting thumb screws are required nor blade straightening levers as in the devices of the prior art. The instant plane not only eliminates many parts but is actually superior in use especially for the amateur but it is also advantageous to the professional as he is not required to make multiple adjustments.

The general proportions and relationship of the platens, bridge, and blade indicated in the drawingand described herein are desirable to the proper functioning of the device but the front platen may be deleted and the bridge made to cantilever. Although the invention has been disclosed as a plane, obviously it may be used in a spoke-shave or draw-knife to form articles other than flat.

Although but a single embodiment of the invention has been shown and described in detail, it is obvious that many changes may be made in the size, shape, detail and arrangements of the various elements of the invention within the scope of the appended claims.

We claim:

1. A carpenter's plane comprising a body-housing having a blade-receiving chamber with cylindrical walls interrupted by the extended line of the work contacting surface of said body and a threaded aperture communicating with the chamher; an arcuate substantially circular blade snugly and manually rotatably disposed in the chamber of said body so as to be adjustable to position the cutting edge of said blade below the work contacting surface of said body, and a set screw threaded in the body aperture abutting the outer surface of said blade to secure said blade relative to said body in adjusted position.

2. A carpenters plane or its equivalent comprising a body having a blade'receiving chamber defined by cylindrical walls, with said chamber opening through the work contacting surface of said body to permit the protrusion of a blades cutting edge there-beyond, an arcuate blade disposed in said chamber being rotatably movable therein to graduate the amount of protrusion of I said blades cutting edge beyond said body's work contacting surface and sidewise slidably disposed to permit the sidewise adjustment of said blades cutting edge, and a set screw adapted to urge said blade against said walls to prevent relative movement between'said blade and said body in any adjusted position of said blade. q

-3. A carpenters plane blade positioning and securing means comprising a blade receiving housing having cylindrical walls, an arcuate substantially co-extensive blade disposed in said housing, and a set screw threaded in said housing bearing on the outer surface of said blade to secure same against movement relative to said housing with the force exerted by said set screw being mainly resisted by said housing at two points substantially adjacent the cutting ends of said blade.

LAWRENCE C. LUME'ITA. SAMUEL S. LUME'I'IA.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 196,444 Grossler' Oct. 23, 1877 1,846,180 Black Feb. 23, 1932 2,153,474 Naylor et al Apr. 4, 1939 FOREIGN PATENTS Number Country Date 58,036 Switzerland Aug. 4, 1911 64,392 Switzerland Sept. 25, 1913

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