US3651840A

US3651840A - Multi or compound cutting miter box

Info

Publication number: US3651840A
Application number: US68675A
Authority: US
Inventors: Charles A Ridenour
Original assignee: Charles A Ridenour
Current assignee: BEOHM CHARLES
Priority date: 1970-09-01
Filing date: 1970-09-01
Publication date: 1972-03-28
Anticipated expiration: 1989-03-28

Abstract

A miter box for cutting multiple or compound angles, the device incorporating a construction whereby full angular adjustment is possible in all three planes, the device incorporating a table supporting a pivotable bracket about a first plane, the bracket supporting a tool post pivotable about a second plane, the tool post supporting a saw head holder pivotable about a third plane so to provide universal full adjustment.

Description

limited 010100 Potent liidetmour 1 1 M011. 2%, W72

[54] MUlJll 0R (IQMIPUUNID ClIT'llNlG 760,982 5/1904 Gordon .j. ..l43/88 METER BQX 788,040 4/1905 Friend ..l43/88 [72] Inventor: Charles A. Ridenour, 183 Pocatontos primary Examiner Dona1d R. Schran Street, Buchannon, W. Va. 26201 22 Filed: Sept. 1, 1970 [57] ABSTRACT [2]] Appl- 68 675 A miter box for cutting multiple or compound angles. the

device incorporating a construction whereby full angular adjustment is possible in all three planes the device incorporat- [52] U.S. Cl .143/88 ing a table supporting a pivotable bracket about a first plane. [5 l] llnt. Cl ..B27b 27/06 the bracket supporting a tool post pivotable about a second [58] Field of Search ..l43/88, 89, 87, 86 plane, the tool post supporting a saw head holder pivotable about a third plane so to provide universal full adjustment. [56] References Cited UNITED STATES PATENTS 679,703 7/1901 Phelan ..l43/88 8 Claims, 3 Drawing Figures MULTI R COMPOUND CUTTING MITER BOX This invention relates generally to miter boxes.

A principal object of the present invention is to provide an improved miter box which overcomes the inadequacy of conventional miter boxes so that a craftsman can cut multiple or compound angles.

Another object of the present invention is to provide a multi or compound cutting miter box which is operative from 40to 90.

Still another object of the present invention is to provide a multi or compound cutting miter box which is designed particularly for unskilled craftsmen so that they can do complicated cutting of angles in a professional manner and without the necessity of employing other specific tools to accomplish the same.

Other objects of the present invention are to provide a multi or compound cutting miter box which is simple in design, inexpensive to manufacture, rugged in construction, easy to use and efficient in operation.

These and other objects will be readily evident upon a study of the following specification together with the accompanying drawings wherein:

FIG. 1 is a perspective view of the bed, front fence and molding clamp shown separate;

FIG. 2 is a perspective view of the saw head holder; and

FIG. 3 is a bottom plane view thereof and shown including a modified design wherein disk rollers may be incorporated in the holder so to form a friction free support guide means for the saw blade for an improved operation.

Referring now to the drawings in detail, the reference numeral represents a multi or compound cutting miter box, according to the present invention wherein there is a wooden table 11 mounted upon a frame 12, the frame 12 being supported upon downwardly extending legs 13 secured by leg bracket spreaders 14 therebetween. Along the rear edge of the frame 12 there is an upwardly extending backstop 15 for a fence. It is to be noted that there is a slot 16 between a rear edge of the wooden table 11 and the back stop 15 and to which the fence 17 is receivable.

A handle 18 for carrying the miter box is secured to the under side of the leg bracket spreader 14 as shown in FIG. 1. Additionally a plurality of tool posts and saw holder straps 19 are also secured to the leg bracket spreaders, and there is a saw stabilizer block 20 centrally mounted upon the same spreader 14. Beneath the frame there are a plurality of downwardly extending hanger brackets 21 for the saw and tool posts. Upon a front side 22 of the frame 12 there is a wrench holder 23 and also a depending wrence 24 for a tool post pivot and slotting pivot nut. The tool post pivot is identified with reference numeral 25, and the slanting pivot nut is identified with the reference numeral 26.

Upon the upper side of the wooden table 11 there are located a plurality of bushings 27 for holding clamps. The molding clamp 28 includes a plurality of downwardly extending pegs 29 receivable into the bushings 27, the molding clamp including a bracket 30 threadingly supporting a horizontally extending threaded screw 31.

Upon a forward side 22 of the wooden table 12 there is welded a bracket 32 which comprises a flat plate and which supports pivotably free an angle bracket 33 provided with arcuate slot 34 and with degree graduations 35 for alignment with an arrow 36 upon the plate 32. A slanting lock 37 fitted through the slot 34 is secured to the plate 32.

Upon the upper side 38 of the angle bracket 33 there is mounted rotatably free a circular base 39 integral with an upstanding vertical tool post 40, the base 39 being graduated in degrees 41, there being provided depressions 42 upon the calibrated degree scale and into which there is receivable an end of a post lock 43.

The tool post is of generally channel shaped configuration and is provided with a depth of cut scale 44 along the length thereof, and the tool post supports a generally U- shaped saw slot 45 fitted therearound and secured by means of a winged nut bolt 46.

A saw head holder 47 is mountable upon tool post 40, the saw head holder including a pair of spaced

apart frames

48 and 49, separated by means of the saw holder spacers 50. The frames are parallel to each other and have a pair of grease slotted bearings 51 located therebetween, the bearings 51 mounted upon pins 52 and having a periphery edge thereof resting upon edges 53 of members 54 secured to each of the

frames

48 and 49. The lower ends of the members 54 are inwardly turned toward each other so to form brackets for holding a saw in the head of the saw holder as shown. Altemately these could be small disk rollers. The lower edges of the

frame

48 and 49 comprise saw guide and saw blade stabilizers 55. A slot 56 accordingly is provided therebetween.

A plate 57 on the saw head holder 47 is provided with

bearing blocks

58, 59 and 60 for fitting to the tool post 40. The plate 57 is provided with arcuate slots 61, each of which is graduated with a degree scale 62. A lock 63 is fitted through each of the slots 61. It is to be noted that the

blocks

58, 59 and 60 comprise saw head bushing guides. The plate 57 forms a saw head leveler or saw slanter when necessary. Winged nuts 64 fitted through frame 49 are secured to the saw holder spacers 50.

The fence 17 is provided with a graduated scale 65 upon the upper side thereof and fitted between a pair of corner angles 66. A pair of plant brackets 67 extend rearwardly from the fence for fitting over the back stop 15 and are provided with winged bolts 68 for securement thereto. The lower corners of the fence are likewise provided with metal angles 69.

The present invention is operated in the following manner:

Place the sawhead holder on the tool post, the saw head bushing guides 58 to 60 allowing the saw head holder to slide up and down on the tool post 40. When this is accomplished, place a miter saw or back saw in the bracket 70 at the lower end of numbers 54, this making a sliding or rolling cradle for holding the saw. Next the saw stop 45 is set for the depth of cut. To cut right or left angle, loosen the tool post lock nut 71 on the post pivot 25 with the wrench 24 and pull out on the post lock 43, turn the tool post 40 and the saw head holder 47 to the marked degree on the tool post as shown at 44. This may be to the right or left which ever the case may be, when the degree of the angle is reached desired, the post lock 43 is released and it will seat itself in the post lock opening 42.

Then with a wrench 24 tighten'the tool post lock nut 71, take the saw by the handle and push forward and then pull back to make a single cut. This is how a single angle is cut.

Now to cut multiple angle cuts, follow as a simple cut but these following operations must be followed:

Loosen the slanting pivot nut 26 with the wrench 24 and also loosen the slanting lock 37, move the tool post down right or left to give the second angle after this angle is readied, tighten the slanting lock 37. This will hold it in position until it can be possible to tighten the slanting pivot nut 26 with the wrench 24. The next step is then to loosen the winged nuts 72 on the lock 63.

The saw head holder 47 is then set to a desired degree on the graduated degree scale 62, to keep the saw blade teeth parallel to the top of the miter box wooden table 11, after which the winged nuts 72 are tightened.

In the front of the saw head holder bolt 73, this should have been loosened and also tightened at the same time that the winged nuts 72 are manipulated.

Now the saw is set to cut compound angles and the fence is needed to hold the work against the same. Place the fence in the slot 16 and slide up close as possible to the saw, then tighten the winged nuts 68 against the back stop for the fence 15. Now place molding clamp 28 in the bushing openings 27 to hold the molding clamp. Then tighten the handle 73 thereof so as it will hold the work against the fence firmly. Now the device is ready to cut compound miter cuts.

The average miter box when being moved is very cumbersome because of the two upright posts that hold the saw, and if the box is tilted backwards, the saw slides out of the post. Or if the saw is taken out of the post, it will slide on the saw table striking the back fence and this damages the saw teeth.

With the present miter box, this has been eliminated completely to make the saw completely ready for transportmg.

First unscrew the tool post lock nut 71 with the wrench 24, then remove the tool post 40 from its table and then screw on the tool post lock nut 71 so as it will not become lost. Loosen the winged nut bolt and then slide the saw holder head 47 off the tool post 40, next remove the saw stop 45, replace the saw head holder down on the tool post 40 and let it slide down the post. Next replace the saw stop 45 and then tighten the winged nut bolt, this keeping the saw head holder 47 from falling off the tool post. Now place the saw under the table with the hole in the saw handle placed over the saw stabilizer block 20, this keeping the saw from sliding out from under the table. Next place the tool post 40 and the saw head holder 47 that is in a fixed position under the saw table and place the tool post and saw holder straps over them and tighten the straps 19 so as to hold them firmly down on the leg bracket spreader 14. Now the wrench 24 is spring throated in the wrench holder 23 so as it will not be dangling loosely when the mitre box is picked up by the handle 18 or being carried.

What I now claim is:

1. In a mitre for multi cutting miter box, the combination of a wooden table mounted upon a frame secured upon a plurality of downwardly extending legs, said frame having along its rear edge an upwardly extending back stop, a slot being located between said back stop and rear edge of said wooden table, a fence being removably positioned within said slot, a forward edge of said table having a plate, said plate supporting a pivotable bracket so that said bracket may be slanted selectively to a desired angle, said angle bracket supporting thereupon a rotatable tool post, said tool post supporting a saw head holder.

2. The combination according to claim 1 wherein leg bracket spreaders are provided between said downwardly extending legs, a carrying handle being secured to one of said leg bracket Spreaders, a saw stabilizer block being mounted upon said leg bracket spreaders, and each of said leg bracket spreaders being provided with a pair of tool post and saw holder straps, an intermediate portion of said wooden table frame being provided upon its under side with hanger brackets for said saw and tool post.

3. The combination as set forth in claim 2, wherein said slanting angle bracket is provided with an arcuate slot and a graduated degree scale along side the same, said degree scale is in alignment with an arrow fixed upon said plate secured to a front edge of said frame, and a slanting lock being fitted through said slot.

4. The combination as set forth in claim 3, wherein the lower end of said tool post is rigidly affixed to a circular base, said circular base being fitted on a central tool post pivot which at its lower end is secured by a tool post lock nut, and said circular base having around its circular edge a graduated degree scale, said graduated degree scale being provided with depressions, and a tool post lock mounted upon an upper side of said angle bracket having a slideable lock pin springly urged for engaging selectively within one of said depressions on said degree scale.

5. The combination as set forth in claim 4, wherein said tool post comprises a vertical member provided with a linear scale along the length thereof, a stop collar being fitted around said tool post, said stop comprising a stop collar adjustably secured upon said post by means of a winged nut bolt.

6. The combination as set forth in claim 5, wherein said saw head holder comprises a pair of parallel spaced apart frames spaced apart by means of saw holder spacers and secured by winged nuts, a pair of grease slotted bearings positioned between said frames positioned adjacent saw guide brackets secured to each of said frames, a saw blade being positioned between said brackets and the lower edge of said frames comprising saw guides and saw blade stabilizers, one of said frames being fitted around a plate being provided with a pair of arcuate grooves, each of said grooves being calibrated in angle degrees each of said slots receiying a lock, said plate bein pivotable about a central bolt being secured to the other sai frame, and said saw head holder being provided with a plurality of saw head bushing guides, each of which has a central opening, said central opening being in alignment with each other for being fitted upon said tool post.

7. The combination as set forth in claim 6 wherein a fence fitted in said slot between a rear edge ofsaid wooden table and said upstanding back stop is provided with a calibrated scale upon its upper edge, said fence having a pair of rearwardly extending clamps, each of which is fitted with a threaded screw and winged nut.

8. The combination as set forth in claim 7, wherein an upper side of said wooden table is provided with a plurality of bushings each of which has a central opening, said openings being selectively engagable with vertically extending pegs on the under side of a molding clamp, said molding clamp including a bracket supporting a horizontally extending threaded screw which at one end is provided with a rotatable handle.

Claims

6. The combination as set forth in claim 5, wherein said saw head holder comprises a pair of parallel spaced apart frames spaced apart by means of saw holder spacers and secured by winged nuts, a pair of grease slotted bearings positioned between said frames positioned adjacent saw guide brackets secured to each of said frames, a saw blade being positioned between said brackets and the lower edge of said frames comprising saw guides and saw blade stabilizers, one of said frames being fitted around a plate being provided with a pair of arcuate grooves, each of said grooves being calibrated in angle degrees, each of said slots receiving a lock, said plate being pivotable about a central bolt being secured to the other said frame, and said saw head holder being provided with a plurality of saw head bushing guides, each of which has a central opening, said central opening being in alignment with each other for being fitted upon said tool post.

7. The combination as set forth in claim 6 wherein a fence fitted in said slot between a rear edge of said wooden table and said upstanding back stop is provided with a calibrated scale upon its upper edge, said fence having a pair of rearwardly extending clamps, each of which is fitted with a threaded screw and winged nut.