US2752963A - Guide attachment for plane - Google Patents

Description

July 3, 1956 R. STRECKERT GUIDE ATTACHMENT FOR PLANE Filed Sept. 15, 1952 INVENTOR. fif/V/FY/FSTPfC/fE/FT United States Patent 2,752,963 Patented July 3, 1956 nice GUIDE ATTACHMENT FOR PLANE Henry R. Streckert, Green Bay, Wis.

Application September 15, 1952, Serial No. 309,687

2 Claims. (Cl. 145-20) This invention relates generally to a carpenters bench plane, and more particularly to an improved form of jointer plane guide attachment therefor to guide a plane in its movement along a piece to be worked so as to plane the same at a definite angle with respect to the longitudinal axis of the piece to be worked.

It is an object of this invention to provide a guide for a plane that maintains a plane obliquely of the longitudinal axis of a piece to be worked.

It is another object of this invention to provide an oblique guide for a plane, disposed so that a planing operation results in a component of force that pulls the guide plate tightly against the guiding surface of the piece to be Worked thereby providing operative stability.

It is still another object of this invention to provide an oblique guide for a plane operative to effect a diagonal slicing cut as distinguished from a straight-ahead frontal cut.

It is yet another object of this invention to provide an oblique guide for a plane that is adjustable to allow the cutting of surfaces at different angles to the guiding surface of the piece to be worked.

It is a further object of this invention to provide means for detachably clamping the guide attachment to the plane body, which means will permit the use of the attachment with various standard makes and sizes of plane bodies.

It is still a further object of this invention to provide an improved plane guide attachment that is simple in construction, inexpensive to manufacture, eflicient, and readily applied to and detachable from a plane body.

Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings in which like reference numerals designate like parts throughout the figures thereof and wherein: t

Fig. 1 shows a perspective view of a standard carpenters plane with the guide attachment mounted thereon.

Fig. 2 is a cross-sectional view of the plane body showing in detail the clamping means for detachably securing the attachment to the body of the plane.

Fig. 3 is a plan View of a plane and the guide attachment thereon, showing the oblique relationship of the plane to a piece to be worked, as determined by the plane guide.

Referring now to the drawings, wherein like reference characters designate like or corresponding parts throughout the several views, there is shown in Fig. 1 (which illustrates a preferred embodiment) a standard jointer or carpenters bench plane comprising a sole plate 11 provided with side walls 12 and 13, a plane bit 14, and a handle 15.

A right-angled shoe element 16, comprising a bottom plate 17 and a side plate 18 disposed at right angles to each other, is adapted to be seated over the lower edge of the left forward portion of the plane body, so that the bottom plate 17 and sole plate 11 are in juxtaposition, and the side wall 12 and side plate 18 are likewise in juxtaposition.

Said shoe element 16 is provided with a transverse slot 19 in side plate 18, and a longitudinal slot 21 in bottom plate 17. Said slots, in conjunction with means about to be described, provide a combination of elements for detachably securing said shoe to the plane body.

An apertured clamping plate 22, having a flange 23, is adapted to seat againstthe inner face of sidewall 12 and the inner face of side plate 18, and is disposed so that the aperture in the clamping plate 22 is in alignment with the slot 19. A square-necked bolt 24, adapted to slideably engage in slot 19, is extended through the apertured clamping plate 22 and is provided with a wing nut 25 for securing the shoe element to the plane body at this point. The elongated slot 19 provides adjustment means for permitting the use of the attachment with various sizes of plane bodies, and at various points along the side wall 12 of a plane body.

Longitudinal slot 21, in combination with a clamping plate 20, bolt 26, and wing nut 30 similarly secures the bottom plate 17 to the sole plate 11 of the plane. The elongated longitudinal slot 21 provides adjustment means for permitting the shoe to be positioned at various placements along the forward portion of the plane as an accommodation for various sizes of planes, and for controlling the width of plane bit out.

The edge 27 of the shoe element 16 is cut obliquely to the longitudinal axis of the .shoe element. At the ends of said oblique edge are provided small flanges 28 and 29, depending normally to the surface of the bottom plate 17. These flanges can be made integral with the plate 17, or secured thereto by welding, or any other means.

A guide plate 31 having a normal mounting flange 32 at its forward end and a corresponding normal arm 33 near its rearward end is pivotally mounted on said flanges 28 and 29, through means of pins 34 and 35, respectively.

The flange 32 is preferably integral with the guide plate 31; however, it can be a separate member secured to the guide plate by welding, or any other means.

The arm 33 is provided with a mounting flange 36 which is secured to the guide plate as by spot Welding.

The axes of pins 28 and 29 are parallel to the oblique edge 27.

Therear extremity of the side plate 18 is provided with an integral perpendicular arm 37, disposed in a plane parallel to the plane of arm 33, and adjacent thereto. The arms are .ofa sufiicient dimension to overlap when operatively disposed. p r r Arm 33 is provided with an arcuate slot 38 as its center the axis of pin 35. The arcuate slot extends for 45 of angular curvature.

With the guide plate 31 disposed at right angles to the sole plate 11, an aperture 39 is provided in the overlapping arm 37 so as to register with the outer end of arcuate slot 38. A similar aperture (not shown) is provided in the same arm 37 in registry with the inner end of arcuate slot 38. A square-necked bolt 41, having a slotted head, is extended through the arcuate slot 38 and through said aperture (not shown) in arm 37 and is provided with a wing nut 45 for securing the pivotally mounted guide plate 31 in any position from 0 to 45, inwardly pivoted, as a departure from its vertical position.

For an outwardly pivoting of guide plate 31, bolt 41 is placed in aperture 39. This arrangement permits the guide plate to swing outwardly 45 from its vertical position.

The arcuate slot is graduated from 0 to 45 as shown;

having and the slot. 42 in the head of bolt 41 serves as an indicating line for the angular settings desired.

Operatin.To apply the attachment to a jointer plane, the shoe element 16 is seated over the left forward portion of the plane bed as shown in Fig. 1; and secured thereto by the bolts. 24 and 26 as shown in Fig. 2 and Fig. 3.

To adjust the attachment for an edge out at 90 to the guiding surface of a piece to be Worked, the bolt 41 is extended through the slot 38 and aperture (not shown) in arm 37, and tightened through means of Wing nut 45 when the guide plate is at 90 to the sole plate 11. This 90 relationship is accomplished by aligning the Zero graduation with the slot 42. This relationship also appertains when the inner end of the arcuate slot is butted against the bolt 41.

The jointer plane is then placed (Fig. 3) on a wood edge 43 to be cut, with the guide plate 31 tightly against the guiding surface 44 of the piece to be worked. This disposition of the plane on the piece to be worked re sults inan oblique positionment of the plane relative to the piece to be worked. As the plane is moved manually forward in this oblique position, a slicing cut is achieved, and the resultant forces pull the guide plate tightly against the guiding surface of the piece to be worked giving stability to the operation and maintaining the plane at 90 to the guiding surface.

To adjust the attachment for a 45 bevel edge cut, the bolt 41 is removed from its previous position and placed in aperture 39, and tightened when the guide plate is pivoted outwardly 45 from its previous perpendicular position. The 45 relationship is accomplished by aligning the zero graduation with the indicating slot in the headof bolt 41. This relationship also appertains when the inner end of the arcuate slot is butted against the bolt 41.

The jointer plane is then placed on the arris to be beveled, with the guide plate 31 tightly against the guiding surface of the piece to be worked, and the procedure followed as outlined above.

It is obvious that the guide plate 31 can be adjusted at 90 to the sole plate, or at any other angular positionment from 0 to 45 on either side thereof, and corresponding cuts made thereby.

To detach the attachment from the body of the plane, one merely loosens the wing nuts 25 and 30 on bolts 24 and 26, respectively, and slides the bolts and clamping plates free from the body of the plane, and simply removes the released attachment therefrom.

It is obvious that the attachment can be made for left-handed operation as well as the preferred righthanded operation as hereinbefore described. For lefthanded operation, the shoe element is adapted to fit over the lower edge of the right forward portion of the plane, and the guide plate is disposed counter-obliquely to the guide plate position hereinbefore described.

The characteristic feature of this invention is the obliquely disposed guide plate which permits a diagonal disposition of the plane relative to the piece to be worked, resulting in a desirable slicing cut and a resultant operating force that pulls the guide plate tightly against the surface of the piece to be worked giving stability to the operation and tending to maintain the plane in an operative position.

Obviously many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood, that within the scope of the appended claims, the invention may be practised otherwise than as specifically described.

What is claimed and desired to be protected by Letters Patent of the United States is:

1. A guide attachment for a plane, comprising: an angle iron shoe element comprising a side flange and a bottom flange meeting at a common edge, said bottom flange having its free side edge at an angle to the common side edge of said shoe element; a guide plate mounted on the underside of said bottom flange, along said free edge and disposed at an angle to the surface of said bottom flange; and means for securing said shoe element to a plane, with the side and bottom flanges and said common side edge in engagement with the respective side and bottom faces and common side edge of the plane body.

2. A guide attachment for a plane, comprising: an angle iron shoe element comprising a side flange and a bottom flange meeting at a common edge, said bottom flange having its free side edge at an angle to the common side edge of said shoe element; a guide plate pivotally mounted, at its end portions, on the underside of said bottom flange, along said free edge; adjustable means connecting said guide plate and said side flange, operative to vary the angle of the guidev plate relative to the bottom flange; stop means, on said adjustable means, operative to limit clockwise and counterclockwise pivotal movement of said guide plate at 45 to said bottom flange; and means for securing said shoe element to a plane, with the side and bottom flanges and said common side edge in engagement with the respective side and bottom faces and common side edge of the plane body.

References Cited in the file of this patent UNITED STATES PATENTS 661,559 Smith Nov. 13, 1900 701,471 Dennis June 3, 1902 805,841 Carson Nov. 28, 1905 1,057,582 Schade Apr. 1, 1913 1,366,297 Szako Jan. 18, 1921 1,432,035 Potter Oct. 17, 1922 2,597,158 Mastriplolito May 20, 1952

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