US1442265A - Miter gauge - Google Patents

Description

Jan. 16, 1923.

amawtoz James Wilt-511 119.

J. W. GRANDLE.

MITER GAUGE.

FILED JAN. 21. 1922.

Vlill E2225 all r Patented Jan. 16, 1923.

UNITED IjsTATes,

P T ,FFICE,

JAMES w. GRANDLELOF PIERRE, sou'rn DAKOTA.

MITER GAUGE.

Application filed. January 21, 1922. .Serial No. 530,923.

of which the following is a specification,

reference being had to the accompanying drawings.

This invention relates to saw gauges and vision of a gauge which may be employed for the formation of miter cuts or may be used for gauging a tool in gaining operationssuch as forming gains for shelving and the like. v y

A further object of the invention is to provide a device of this character which is extremely simple in construction and operation and which may be very cheaply constructed.

A still further object of the invention is to provide a neat and compact tool which may replace the ordinary miter box in making miter cuts and which may be much more readily employed.

Other objects and advantages of the in-. vention will become apparent throughout the course of the following description.

In the accompanying drawings wherein for the purpose ofv illustration 'is shown a preferred embodiment of my invention, and wherein like reference characters designate like. part-s throughout; I

Figure 1 is a perspective view of a gauge constructed in accordance with my invention 5 Figure 2 is a section on the line- 2.2

of Figure 1 I the cut is to be made; is made entirely plain with the exception of openings 13 formed therein, through which securing elements may be driven into the member to be cut to maintain the device in position. If desired, the inner face of the'plate 11 may% I have formed thereon piercing points 13" for this purpose and the openings 13 may be dispensed with or both means may be em ployed.

The plate 12 has'formed therein alongi- .tudinally extending slot 14, the under sides 'of which willb'e under cut to 'formupon the under surface of the plate 12 rebated .ShOl'llClGIS 15 having their faces milled. has for an important object thereof thepro Slidably mounted within the slot 1 1- is a runner 16 having=at its sides flanges 17 operating beneath the shoulders 15 and having, their upper surfaces milled. The upper surface. of the runner 16 issubstan- 'tially flush with the upper surface of the plate '12 and has secured thereto by vmeans of a screw 18 extending into the runner a plate 19.which embodiesportions overlying the edges of the slot 14. The plate 19 is bolt 18 asat 20 to the runner so as toprevent shifting of the plate relative to the likewise secured at a point remote from the r runner. This plate embodies a pointer finger v 21 coactingwith graduations 22 formed The clamping head 18- likewise serves to clamp one endfof an arm 23 I which surrounds the bolt 18 and is rotatable thereonf The plate 12 is provided at one end thereof with an enlargement 12 having upstanct ing therefrom a pivot post 2 1.

The opposite 'end of the arm 23 is pivotally connected with a guide clamp C for guiding the saw in making the cut. This clamp consists of a pair of substantially similarsections 25 having fiat adj acentfaces 26' which I are smoothly finished and which are adapted to engage the opposite sides of" a saw blade disposed therebetween. The faces :26 are held 'in engagement with the saw blade interposed between by means of spring U-bolts 27 preferably two in number and disposed adjacent the ends'of the sections 25. One of the sections 25 embodies an extension 28 disposed at the side thereof remote from-its plain face 26 and this extension is rotatably engaged with the post 7 24 of the plate 12, the extension being held in position thereon by means of a nut 29. This nut does not bind the extension 28,

since it engages against the shoulder 30 formed on the post 24. One of the U-bolts 27 preferably extends entirely through the sections 25 and is provided upon one leg thereof with an extension 31 having its lower end arranged in the same plane as the under surface of the plate 12. The other leg of the U-bolt preferably forms the pivotal mounting of the arm"28up'on the clamp. The inneredge of the plate 12 or that edge thereof most remote from the plate 11 is provided therein with a series of notches 32 and 32*. The notches 32 are arranged at a predetermined distance from one another, preferably approximately two inches and are designated by numerals to indicate the distance from the plate of a saw placed in the guide clamp C when the guide clamp is arranged at right angles to the main frame 10.

A notch 32 is arranged intermediate each of the notches 32 and is spaced therefrom a predetermined space, for example, threequarters of an inch which is equivalent to the thickness of a finished one-inch board such as employed in shelving. When it is desired to employ the device for miter cuts the face 11 is placed against the surface of the material to be out next adjacent that surface thereof where the miter cut is to be made and secured in position in any desired manner. A gauge may be then set to direct the clamp at the selected angle by loosening the thumb screw 18 and shifting the pointer 21 of the plate 19 until it coincides with the graduations of the cut desired, the graduations 22 being marked in degrees, as 45", 90, etc. The 90 graduation is preferably arranged substantially centrally of the slot 14 as regards its length so that miter cuts may be made to either side of the center. The saw is then placed in position in the clamp and operated. to form the out.

When it is desired to employ the clamp for gaining, as in forming a standard for shelving, a nail is driven into the material and the last right hand notch of the plate 12 engaged therewith. The cut is formed and the gauge is operated until the next notch engages the nail when the second cut for the gain is made. These cuts may then be employed as guides in making succeeding cuts and the cuts may be spaced apart the desired distance by simply coinciding the notch at the desired measurement with. the preceeding cut. Thus the gains may be spaced apart a distance of four notches, six, eight, or any other desired measurement within the scope of the instrument which may, of course, be made in any desired length.

From the foregoing, it is believed to be obvious that I have constructed an instrument for the purposes intended which is particularly well adapted for the use set forth in that it eliminates the necessity of providing separate instruments to perform the operations described, and in that it eliminates the necessity of employing miter boxes which are cumbersome and which after much usage become very inaccurate. It will furthermore be obvious that many changes are possible in the shape, size and arrangement of the parts herein described without in any manner departing from the spirit of my invention, or the scope of the subjoined claims.

WVhat is claimed is 1. A device of the character described comprising an'angle frame having formed in one plate thereof a longitudinally extending slot, a runner slidably mounted within the slot, a saw guide pivotally connected to said frame at one .end thereof, anarm connecting the free end of the saw guide with said runner and vpivotally connected with each thereof, and means for simultaneously clamping the arm to the runner and the run ner in adjusted position.

2. A gauge of the type described embodying a -ma-in frame comprisinga pair of rectangular-1y disposed plates one of which is provided with a longitudinally extending slot, a runner slidably mounted in said slotand provided with a pointer coac-ting with the graduati'ons formed upon the plate, means for locking-the runner in adjusted position, a clamp guide pivotally, mounted. upon the upper face of the slotted plate at one end thereof and embodying jaw sections, spring U-bolts connecting said jaw sections and tending to force the same togethenan' arm pivotally connected to said runner at one endand with an arm of one of the U- bolts at the opposite end, and an extension carried by-one of said jaw sections and having its lower face coplanar with the lower face of said plate.

In testimony whereof I hereunto afiix my JAMES W. GRANDLE.

signature.

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