US2638134A

US2638134A - Adjustable miter rule attachment

Info

Publication number: US2638134A
Application number: US134636A
Authority: US
Inventors: Walter T Kearney
Original assignee: LEROY GUITTAR SR
Current assignee: LEROY GUITTAR SR
Priority date: 1949-12-23
Filing date: 1949-12-23
Publication date: 1953-05-12
Anticipated expiration: 1970-05-12

Description

Inventor 2 Sheets-Sheet l W. T. KEARN EY www,

@iElgw m E i vw ADJUSTABLE MITER RULE ATTACHMENT May 12, 1953 Filed Dec. 25. 1949 Waller Kearrney By ,QAM

May 12, 1953 y w. T. KEARNEY 2,638,134

.ADJUSTABLE MITER RULE ATTACHMENT Filed Dec. 25. 1949 2 Sheets-Sheet 2 Fl'g. 2.

I n ventar w/rek T. Kearney d/muy Patented May 12, 1953 ADJUSTABLE MI'I'ER RULE ATTACHMENT Walter T. Kearney, St. Louis, Mo., assigner Aof Aforty-nine per cent to Leroy Guittar, Sr., St.

Louis,.Mo.

ApplicationiDecember 23, 1949, Serial N o. 134,636

(Ol. y14R-86) Claims. l

This .invention relates to new and useful improvements in mitre rules, yand more particularly pertains to a combination mitre rule and vise wherein novel means are provided for guiding oblique movement ofthe mitrerule .and `for mov- `ing the same.

The primary object oi this invention is to en- "able an operator to yperform precise mitering while permitting his hands to be free from hav- ;ing to hold the workpiece.

Another important `object of this invention is :to provide a mitre rule which is automatically adjusted for different sizes of work -and which will securely grip the same ,during mitering.

Still another important object of this invention, in conformity with the foregoing objects, is

to provide a mitre rule which is `eflicaeious in operation, simple and inexpensive in construction, and which .is durable and eiiicient for the ,purposesintended y Almeritorious feature of the present invention resides in the means provided for guidingoblique ymovement of `the mitre rule which will positively retain the same in parallel relation with the side rail.

*become apparent as the following description proceeds, are attained by the `present invention, a preferred embodiment of which has been illustrated by way of example only in the accom-l panying drawings, wherein:

Figure 1 is a top plan View of the present invention, concealed portions being indicated in dotted outline, and showing the same engaging a piece of work;

Figure 2 is a iront elevational View of the present invention;

Figure 3 is a side elevational view of the present invention, being taken from the right-hand side as seen in Figure 1;

Figure 4 is a vertical transverse sectional view of the present invention, being taken upon the plane Vof the broken section line 4-4 of Figure 1; and

2 Figure 5 is va vertical longitudinal sectional view, being `taken upon the plane of the section y line 5-5 of Figure 1.

Reference is now Vmade -more specieally to v'the 'accompanying drawings, `wherein like numerals designate similar Aparts `throughout the various Views vand in which the mitre .rule is indicated generally by the numeral IIJ.

The mitre rule `Ill comprises ra 'base 'I2 along one edge of which is secured, by means of fasteners I4, a vertical guide rail IB, which, ras will be seen hereinafter, 'also servesthe function of `being a fixed jaw.

`A mitre rule,-indicated generally at I8, is slidably 4mounted upon the base I2 and has one edge 528 parallel to the `side rail I6. The mitre rule I8 has a

second Aedge

2,2 that intersects vthe edge 28, being preferably at a forty-'live'degree angle theretd'and vthe edge `2l) is provided with `suitable indicia 24 having Vits zero point at rthe `intersection of `the edges 2 8 land`22. It will also be noted that the edge 22 is substantially in lalignment with one end of the rail I6.

The base `l2 is provided with a pair of parallel guide slots 28, which are parallel to the edge 22, and which slidingly receive guides 28, the imitre rule I8 being ysecured to the latter Aby means of fasteners 38. Itwillbe understood 'that Ithis arrangement limits sliding movementofthe mitre rule i 8 ,on the base I2, to being parallel `to `the edge 22, yand that .the edge'20 will be retained in parallel `relationship with `the guide rail It,

[Mitre .rule I8 is retained on the base I2 by means of a .tie har 132 which is disposed on the opposite side .of the `base I.2 and `secured tothe guides 42 8 .bymeans of fasteners 33.

A hand lever it is ,disposed beneath .the vbase I2 and opposite the edgeto which the guide rail I6 is secured, and ispivoted to the base I2 for .horizontal .movement yas .by lpinion bearings 38.

Eccentrically to its own pivot, the -hand lever 36 is pivoted at 48 to one endof an offset connecting link 42, which in turn has its other end pivoted to the tie bar 3'2, as at 44. As thus far described, it will be evident that oscillatory movement of the hand lever 36 about its pivot 38 will, through the connecting link 42, the tie bar 32, and guides 28, cause the mitre rule I8 to move toward and away from the guide rail I6.

Means is provided for normally urging the edge 20 `of the mitre rule I8 into engagement with the guide rail I 5. These means include a lspring mount 46 threadedly engaging the hand lever 3'6 and extending downwardly therefrom. The mount 46 carries at its lower end a pivoted member 4B having 'an annular groove '50 by means of a fastener 52. A pair of longitudinally spaced brackets 54 are secured to and depend from the base l2, the arrangement being such that the brackets 54 and the mount 4B are disposed substantially at the apices of an imaginary equilateral triangle. A pair of coiled

tension springs

56 and 58 are secured to the brackets 54 and have their other ends engaging the hooked ends El] of a V-shaped spring-engaging element 62, the apex of which is received in the groove 50.

As shown in Figure 1, it will be evident that clockwise rotation of the hand lever 3E will cause the mitre rule I8 to move toward the guide rail I6, vand it is to be noted that the spring mount 46 is disposed eccentrically with respect to the pivot 38, whereby the springs 55 and 58 tend to cause clockwise rotation of the lever 36 and closure of the mitre rule i8 with the guide rail i6. It will be appreciated that two springs have been provided in the preferred construction in order that a suiiicient couple will act on the hand lever 36 throughout its angular Voscillations to exert a considerable clamping force between 'the mitre rule I8 and the guide rail l t.

The operation 'of the present invention will be readily understood. The operator, after trimming rst mitre, pulls the hand lever 36 into a position opening the mitre rule i8 and the guide rail l5, and then inserts material Gli to the required dimension on the mitre rule and the operator then releases the lever, allowing the rule to grip vthe material automatically between the mitre rule I8 and the guide rail IS, regardless of the dimensions of the material t4. With the work 64 thus positioned as desired, the edge 22 of the mitre rule constitutes a guide edge for a saw, not shown, for cutting or mitering the work '64, as will be understood. It is to be noted that by virtue of the edge 22 being parallel to the guide slots 26, the guide edge 22 remains substantially in alignment with one end of the rail I6, so that the opposite sides of the work -64 are securely clamped immediately adjacent the plane at which the work will be `cut by a 'saw guided by the edge 22, irrespective of the adjustment of the device for the width o-f the work. inasmuch as the end vof the rail It terminates in substantial alignment with the guide edge 22, `a saw may be guided in cutting the work 64 by both the end edge of the rail I6 and the edge 22.

It is believed that the advantages of the present invention will be readily appreciated by those skilled in the art in that the same permits flexibility and ease for the operator, increases lproduction, as the same automatically grips the work, it ldecreases the hazards of this operation because both hands of the operator are free during mitering, and the yarrangement of the parts of the device permit the same to be readily used .on shears or saws.

From the foregoing, the construction and operation of the device will be readily understood land further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art after a consideration of the foregoing speciiication and accompanying drawings, it is not desired to limit the invention to the exact construction shown and described, but all suitable modications and equivalents may be resorted to, falling within the scope of the appended claims.

Having described the claimed as new is:

1. A combined mitre rule and vise, comprising la base having a xed upstanding guide rail along one edge thereof, a mitre rule movably mounted on said base and having an edge parallel to and engageable with said rail, said rule having a second edge intersecting the first edge at an oblique angle and substantially aligned with an edge of the rail, means for guiding movement of the rule on the base in a direction parallel to said second edge with the rst edge being maintained parallel to said rail, and nieans connected to said base and operatively connected to said rule for yieldingly urging said rule towards said rail for engaging a piece of work therebetween.

2. The combination or" claiin 1, wherein said iirst means includes the base being provided with a pair of guide slots, a pair of guides 'on said rule guidedly received insa-id slots.

3. The combination of claim 1, wherein said first means includes the base being provided with a pair of guide slots, a pair of guides on said rule guidedly received in said slots, said last means including a hand lever pivcted to the base and operatively connected to the guides.

4. The combination of claim 3 including, a tie bar connecting said guides, said hand lever being `disposed on the under side of the base, and a link having one end pivoted to the lever and the other pivoted to the tie bar.

5. The combination of claim 4, wherein said last named means also include tension springs arranged in V formation with corresponding ends secured to said hand lever eccentrically with respect to pivotal connection between the lever and base, the other ends or" said springs being secured to said base.

WALTER T. KEARNEY.

invention, what is References Cited in the file of this patent UNTTED STATES PATENTS Number Name Date 154,234 Everett Aug. 18, 1874 1,805,395 Glass May l2, 1931 1,957,709 Haynes May 8, 1934 2,254,541 Nordgren Sept. 2, 1941