US2297699A - Surface cutting tool - Google Patents

Description

Oct. 6, 1942. v v. G. MOORE 2,297,699

SURFACE CUTTING TOOL Filed Feb. 15, 1941 Patented Oct. 6, 1942 UNITED ST TES PATENT OFFICE SURFACE CUTTING TOOL Application February 15, 1941, Serial No. 379,098 In Canada February 10, 1940 4 Claims.

The principal objects of this invention are to provide a simple and inexpensive type of tool for cutting grooves or designs on panel surfaces and to provide a form of device which may be very easily manipulated and accurately guided and in which the cutting tools will be readily interchangeable and adjustable in accordance with the character of the work to be performed.

The principal feature of the invention resides in the novel construction of the device in the form of an integral cast block of substantially triangular form having one surface arranged to engage the plane surface of a panel in sliding contact and having the opposite sloping surface provided with spaced tool-engaging and positioning abutments between which a tool-clamping member is mounted, such tool being readily interchangeable with tools of different cutting profile.

In the drawing Figure 1 is a perspective view of a device constructed in accordance with the present invention showing the cutting tool removed.

Figure 2 is a side elevational View showing the cutting tool in clamped position.

Figures 3 and 4 are plan views of inter-changeable tools of different profile.

In the use of manufactured panel board such as that known under the trade name of Masonite or Bakelite or the like, it is frequently necessary to cut grooves, patterns or designs in the surface thereof, and the use of special machines for this purpose renders the cost prohibitively high in many cases, and the present invention has been devised to satisfy the demand for a very simple form of device by means of which this grooving may be carried out in an accurate and dependable manner by hand.

Referring to the form of invention illustrated, the main body of the device is here shown formed of a unitary casting which may advantageously be of a light metal such as aluminum and in substantially the form of a right-angled triangle.

The side I, which represents the bottom of the device, is finished in a fiat plane so that it will firmly support the device against tipping or rocking in being manipulated in guiding contact with the surface of a panel 2 to be grooved.

An abutment 3 extends above the upper side 4 of the triangular block and is apertured at 5 to receive a cutting tool 6. At the upper rear end of the surface 4 a second abutment 1 extends and this abutment is provided with a groove 8 in register with the aperture 5 so that the tool 6 will be supported firmly at the opposite ends.

ments 3 and 1 with a jaw-like portion In overhanging the tool 6 and provided with a groove 1 l complementary to the groove 8 but offset from the latter, and a clamping screw I2 is passed through the block 9 and threaded into the base block.

Thus by tightening the clamping screw l2 the tool may be firmly clamped in position with the cutting edge 6' projecting a suitable distance below the surface I. Not only will this arrangement of clamping means firmly clamp the tool in place but it will also permit the tool to be rotatably adjusted in View of the circular cross sectional shape of the tool.

It will be further observed that the orifice 5 terminates at its forward end immediately adjacent the surface I so that only a very short portion of the cutting tool will be required to project beyond the supporting block so that firm support will be achieved.

It will also be observed that no portion of the supporting block projects beyond the cutting edge in a forward direction so that the actual cutting edge will be plainly visible at all times, thereby greatly facilitating the accurate guiding thereof along predetermined lines.

The main block or body of the device may be either cast solid or, as indicated in dotted lines in Figure 2, it may be of hollow construction interiorly.

A device such as defined, although of simple construction and of few parts will nevertheless serve well defined and useful purpose.

What I claim as my invention is:

1. A device of the class described, comprising the combination with a rod-like cutting tool having a profiled cutting end, of a guiding support therefor comprising a cast metal block of substantial triangular form converging toward its forward end, tool-supporting abutments at the forward and rearward ends having aligned recesses to receive and position said rod-like cuting tool, and means for clamping said tool against said abutments within said recesses with the forward cutting edge thereof projecting free beyond the forward extremity of the cast metal block, said block being free of projection beyond the forward cutting extremity of the tool to provide an unobstructed view of the work forwardly of the cutting edge and enable accurate guiding thereof along predetermined lines.

2. A device of the class described, comprising a cast metal block of substantial right-angled triangular form having one side faced to engage Aclamping block 9 is located between the abuta surface in sliding contact and having spaced tool-supporting abutments on the upper opposite side, a tool engaging said abutments at spaced points in the length thereof leaving the tool substantially unsupported between said abutments, and a clamping block interposed between said abutments and applying clamping tension to said tool.

3. Means as claimed in claim 1 in which said means for clamping comprises a clamping block arranged between the tool-supporting abutments 10 4. A device of the class described, comprising a tapering cast metal block having an apertured abutment at the narrow forward end, a cutting tool inserted in said aperture, a supporting abutment at the rearward end of said block at a higher level than the aforesaid abutment and having a groove therein in register with said aperture in which the upper or rearward end of the tool is adapted to rest, and a clamping block disposed between said abutments and having a grooved jaw-like portion overhanging the tool in ofiset relation to the groove of the second-mentioned abutment for firmly clamping the tool in place.

VICTOR G. MOORE.

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