US2600859A - Hand electric plane - Google Patents

Description

June 17, 1952 R. DRYsDALE 2,600,859

HAND ELECTRIC PLANE Filed June 22, 1948 lll..

INVENTOR.

HUBERT DRYEDALE.

BY. 7/ ,M y Mm ATTORNEYS.

Patented June 17, 1952 UNITED .STATES PATENT OFFICE 'HAND AELECTRIC PLANE Robert Drysdale, Sunnyvale, Calif.

Appllcationvllune 22, 1948,V Serial No. 34.4.82

The present invention relates to arhand electric plane, and has for an object to .provide a Wood working tool of this character .in fwhich the planing voperation may becarried out with relative speed and accuracy, and withminimum eiort on the partof the operator of the plane. It is particularly proposed to provide a hand electric plane having a rotary cutting blade operated by .an electric motor carriedupon .the body of'the'plane, `the'plane. further .being .pro- 'vided with .hand vgripfl'neans by which yit may be` held 'and' .guided `over the -tsurface .to .be .planed inlarsubstantially .similar ymanner to af'conventional handplane.

It is further proposed to provide vadjustable gauge :means .to determine the .depth of cut, as well as adjustment :means for varying the depth of cut as'tlle planeis'being operated, this latter meansienabling the .plane to follow a curved vor vunevenfscriloed line.

With .theaboyetand :other objects in view, an embodiment fof rthe .invention'iszshown in the -faccompanying drawings, and this embodiment will be .hereinafter 4more .fully Ydescribed with reference thereto, *and the invention will be finally vpointedout .in the claims.

In the drawings:

Fig. 1.,is a side elevation of a hand electric plane, `according to the illustrated exemplary .embodimentof theinvention.

VE.ig..2 isia plan view. thereof.

Fig.. 3 :isa vvertical longitudinal sectional view, taken-along vthe :line 3-3 ofV Fig. 2,. and, showing .the plane in operativev relation'with `a strip of wood, the .plane being set to out atfa .predeter-1 mined depth.

Fig. r'41is a vertical transverse .sectional view. .taken .along the .line 4--401 Fig. l.

Fig. "5 .is a vertical transverse sectional view, 'taken-along the .line -5-'5 of .Fig- 1.

Fig. 6 is a vertical transverse sectional view, taken along'the .line 6--6 of Fig. .1,

Fig? -'is a perspective'view showing the cutter shaft and .cutter blade `in :separated :relation.

.Similar reference @characters vindicate z corre- -ispondin'g rpartsxthroughout' the #several :fig-lires lof thedrawings.

Referring :to the drawings, lthe electric plane, according to ythe illustrated exemplary embodiment `of .the invention, comprises .a hollow iframe or body, .indicated.generallyV as l0. and comprising .a .horizontal top wall I l, /verticalside walls I2-l2 `andata'.horizontal.hase .wall lathe .base wall :having ...its torward :send i-.rearwar'dly A.;

2 offset from the forward` ends of thetop .andside walls, `and the side walls having cut-outnotches l4.l4 in their rforwardly extending portions adjacent the forward end of the base wall-for receiving the cutter shaft, .as will hereinafter more fully appear.

Upon the upper side of .the frame there is mounted a motor supporting bracket l5 vupon which an .electric lmotor I5 is secured by .aclamp- `ing band I'I secured to the ,bracket by .means of .cross pins i8 and i9, the Iband being .split .at one side and provided with Opposed apertured ears 20 and .2| adapted to befadjusta'bly connected .together by a boli;y 22. The motor is provided with a conductor 'cord 23 anda switch 24, vand upon the-.end of its transverse .Shaft25 is provided Ywith a pulley .26 for driving the rotary cutter, as will presently .more fully appear.

A Yhand grip handle 21 .is secured upon the upper'side of the flanle at a point'rearwardly of the motor, in a substantially .Similar manner to the'hand griprof a conventional hand plane.

Within the .fr-.ame there is :providedva cutter blade carrier, vindicated generally as 28, Tand comprising a top wall 29 and side walls 3030. the top wall havingsecured to il; a ,rearwardly extending leatspring 3| secured to theilnderside of thetop wall il of the frame by means of bolts32-32, thisv spring being .-.Sultably .Curved -towallow Vfor the vertical adjustment movement ofthe cutter blade, as will presently more ful/1y appear. The forward vend portions of the'lside walls of the cutter blade carrier are extended downwardly Vto provide V,bearing vsupports V33--f33 in'which .anged bearing bushings .B4-341er the cutter shaftA are secured.

The cutter shaft `35 is provided with a longitudinalslot 3S in which the cutter blade 31 is engaged and secured by set screws 38.3,8 engaged in yholes 39--39 in the .shaft and V.holes 40-40 in the blade, the blade being provided at its opposed edges with oppositely inclined cuttingedge portions 4i-4,|, The cutter-.Shaft isrotatablyengaged in the .bearings v34-'3fl, .and .hassecured upon oneend apu1ley42 `over which a .driving belt 43 extends .from the `pulley 2,6 of the motor. Upon the other end of .the-.Shaft there is secured ,a retaining .collar -44 to retain the cutter shaft againstaxial movement.

The Cutter blade carrier isV adaptedtovbe vertically adjusted, andfor Athis purpose a screw 45 having an operating knob 46 at its .upperend is. rotatably engaged in .a vbearing .hole 14l inthe topfwall il I.c f'.the fremde retainingrcollar=4-8 being secured upon the screw at the underside of the top wall to retain the screw against vertical movement while permitting it to be rotated. The screw is engaged in a threaded hole 49 in a bar 50 welded or otherwise suitably secured to the underside of the top wall 29 of the cutter blade carrier. This screw takes the vertical thrust imposed upon the cutter blade carrier during the planing operation, and by rotation of the screw the blade may be vertically adjusted so as to adapt the plane to certain desired planing operations, as will be hereinafter more fully pointed out.

Upon the underside of the frame there is secured by screws 5I a strip 52, which is slightly narrower than the cutting blade so that it will follow in the cut made by the blade during normal planing operations where the blade is set flush with the bottom surface of the strip.

Forwardly of the cutter blade there is provided a vertically adjustable gauge shoe, indicated generally as 53, and comprising a base wall 54 and side walls 55-55, the side walls being slidably engaged with the inner sides of the side walls of the frame I0 and being guided in vertical adjustment movement with respect thereto by means of transverse bolts 56-55 connected between the side walls of the frame and engaged in vertical slots 51-51 in the side walls 55. Vertical adjustment movement is imparted to the shoe by means of a vertical screw 58 provided at its upper end with a knob 59 and engaged in a bearing hole B0 in the top wall ll of the frame, a retaining collar 6I being secured upon the screw at the under side of the top wall l I of the frame, so as to retain the screw against vertical movement while permitting it to be rotated. The screw is engaged in a threaded nut member 62 of the shoe, preferably secured therein by welding. By turning the knob 59 the gauge shoe is vertically adjusted for the purpose of carrying out the desired planing operation, as will presently vbe more fully described. The knob also serves as a convenient hand hold for one hand of the operator while the other hand is gripped upon the hand grip 21.

The operation is as follows:

Assuming a board is to be planed to a depth Vof 1/8 inch, the cutting blade is set flush with the bottom of the strip 52 and the gauge shoe 53 is raised by turning the knob 59 1/8 inch above the cutting plane of the blade. The motor is started and the gauge shoe is placed upon the end of the unplaned board and the blade is guided into engagement with the board surface causing it to cut to the desired depth, the plane being gradually moved across the board surface with the shoe 53 sliding upon the unplaned part and the strip 52 sliding upon the planed part.

As the strip 52 is slightly narrower it will follow in the cut made by the blade, this being of particular importance when a wide surface of a board is being planed. In the case of planing the edge of a piece of board which is narrower than the blade, the strip 52 will simply follow the scribed along the side of a door where the door jamb was forced in along the middle, the plane is rst set with the gauge shoe 53 flush with the bottom surface of the strip 52 and with the blade either above the bottom surface of strip 52 or flush therewith. As the plane is moved along the surface, the knob 46 is turned and the blade lowered, so as to cut to the desired depth, it being possible to regulate the depth of the cut as the blade is moved along so that the scribed line may be accurately followed. Where it is desired to employ the plane for cutting grooves, or for routing, a narrow blade of the desired groove width may be substituted, a strip 52 slightly narrower than the blade being attached to the frame I0 so that it will properly follow in the cut made by the blade.

I have illustrated and described a preferred and satisfactory embodiment of the invention, but it will be understood that changes may be made therein, within the spirit and scope thereof, as defined in the appended claims.

What is claimed is:

l. A power driven hand plane, comprising a longitudinal frame having a base wall and vertical side walls extending upwardly from said base wall and extending forwardly with respect to the forward edge of said base wall to provide an opening in the lower side of said frame forwardly of said base wall, said side walls having transversely aligned openings extending upwardly from their lower edges forwardly of and adjacent the forward edge of said base wall, a blade carrier mounted in said frame having vertical side walls engaged interiorly with said frame side walls rearwardly of said transversely aligned openings and extending forwardly over said openings, means cooperatively connected between said frame and said blade carrier operable to raise and lower said blade carrier, a transverse blade carrying shaft rotatably mounted in said blade carrier side walls and having at least one of its ends extended through one of the said transversely aligned openings. power driven means carried by said frame and operably connected to said extended shaft end, a blade carried by said shaft and disposed entirely between the vertical planes of said blade carrier side walls, a gauge shoe mounted in said frame forwardly of said shaft having a horizontal work engaging base wall and vertical side walls engaged interiorly with said frame side walls, means cooperatively connected between said frame member and said shoe operable to raise and lower said shoe with respect to said frame member, and fastening means cooperatively connected between said frame member and said shoe adapted to rigidly x the position of adjustment of said shoe.

2. A power driven hand plane, comprising a longitudinal frame having a base wall and vertical side walls extending upwardly from said base wall and extending forwardly with respect to the forward edge of said base wall to provide an opening in the lower side of said frame forwardly of said base wall, said side walls having transversely aligned openings extending upwardly from their lower edges forwardly of and adjacent the forward edge of said base wall, a blade carrier mounted in said frame having vertical side walls engaged interiorly with said frame side walls rearwardly of said transversely aligned openings and extending forwardly over said openings, means cooperatively connected between said frame and said blade carrier operable to raise and. lower said blade carrier, a

transverse blade carrying shaft rotatably mounted in said blade carrier side walls and having at least one of its ends extended through one of the said transversely aligned openings, ipower driven means carried by said frame and operably connected to said extended shaft end, a blade carried by said shaft and disposed entirely between the vertical planes of said blade carrier side Wallsl a gauge shoe mounted in said frame forwardly of said shaft having a horizontal Work engaging base wall and vertical side walls engaged interiorly with said frame side Walls. means cooperatively connected between said frame member and said shoe operable to raise and lower said shoe with respect to said frame member, and a Work engaging strip carried by said base Wall of said frame disposed in longitudinal line with the cutting path of said blade and being of less width than the transverse width of said blade with its side edges entirely inwardly of the longitudinal side edges of said cutting path.

ROBERT DRYSDALE.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS

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