US1408800A - Carpenter's square and bevel - Google Patents

Description

F. G. COLE.

CARPENTERS SQUARE AND BEVEL.

Patented Mar. 7, 1922.

APPLICATION FILED MAY I9, 1920.

flvenin 7 912/50? 6% UNITED STATES PATENT OFFICE.

FRANK G. COLE, 0F HAVERJ-IILL; IEASSACHUSETTS.

CARPENTERS SQUARE AND BEVEL.

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Application filed May 19,

To all whom it may concern; 7

Be it known that L Fulani; G. COLE, a citizen of the llnited States oi America and resident of Haveriill, in the county of Essex and State of lvlassaclmsetts, have invented new and useful improvements in. Carpenters Squares and Revels, of which the following is a specification.

This invention relates to measuring iu struments and particularly to carpenters squares and bevels and has for its object the provision of an adjustable instrument oi which the members are capable of assuming any angle with each other from zero degrees to ninety degrees and which shall moreover be adapted for use either right handed or left handed to suit the exigencies of the work or the peculiarities of the workman. in the drawings hereto annexed which illustrate this invention,

Fig. 1 is a plan view of an adjustable square and. bevel with a radius at right angles to the base;

Fig. 2 is a plan of the same instrument showing the manner in which the radius may be reversed "from one side of the base to th other;

Fig. 3 is a plan view partly broken away illustrating the instrument in condition for use as an ordinary square;

Fig. is a plan View illustrating the condition of the instrument when used as a El-5 bevel;

Fig. 5 an end view viewed. from. the right o'l l ig. 1;

Fig. 6 is a longitudinal section through the middle of the radius slide showing portions of the base;

Fig. 7 is a detail showing a plan view of one of the clamping springs; and

l ig. 8 is a cross section taken on the line 8-8 of Fig. 1.

Tlhe base of the instrument illustrated in the drawings consists of two parallel straight edged members 11 which are spaced apart and joined by end yolces 22 and if desired intermediate yolres 3. he parallel members or rails 11 are beveled at 1" along their inner edp'es and undercut at 1 the two beveled edges forming a lodgment tor beveled lugs such as l which are secured at the under sides of the slides presently to be de scribed. The rails 11 are also undercut at 1 so as to provide lodgment tor the flat heads 10 of clamping'bolts 10. The base comprising parallel rails 11 is substan- Specification of Letters Patent.

1920. Serial No. 382,454.

tially the same as that described in my United States Patent No; 1079,110, dated Nov. 18, 1913,, and the adjustable clamping means by which the slides are secured to the base as desired are substantially the same and operate in generally the same manner as the clamping means for the adjustable square and bevel members described in the said patent.

in the improvements here described there are employed two adjustable slides, both mounted in a way which extends lengthwise of the base and preferably from end to end thereof. One of these, marked a in the drawings, is the radius slide since it cons stitutes the support on which the radius 5 is pivotally mounted at The other marked 6 is the strut slide since it carries pivotally mounted upon it at 6 2 the strut 7 which is also p'ivotally secured to the radius 5 at 7, a suitable distance from the radius pivot 5. The adjustable clamping means by which the slides l and 6 respectively may be secured at desired positions upon the base consist of the screw threaded bolts 10 provided with, the flat heads 10, the latter lodged in the undercuts 1 on the rails 1; plate springs 1212,pertorated to admit the bolts 10, and knurled nuts 11. Each spring; 12 and 12 bears at its ends upon the top of. a slide, either slide 4 or slide 6, so that when the nut 11 is tightened the beveled lug such as 1- is drawn to a seat on the beveled edges 1 of the rails 1 and is thus accurately centered on the base. By slackening the nut 11 either slide may be sufficiently released from thebase rails 1 so as to be lifted therefrom and be turned pivotally upon the bolt 10. I have shown both slides 4 and ,6 tl'nis mounted although in practice it will hardly be necessary to slaoken the slide 6 more than enough to slide it on the base rails 1. The above mentioned parts are so proportioned that when the slidesd and 6 are placed with their adjacent ends abutting, the radius '5 will Patented Mar. 7, 1922-.

the radius assumes the desired angle of relationship with the base- The rela tionship is shown in Fig. it it be desired to lay the radius 5 parallel With the base so as to use the basesimply as a straight edge or for purposes ot'paclring and transportation the clamping means of radius slide 4 are slackened until the beveled lugs 4 may slip out of their lodgment on the beveled edges 1 of the edges 1 and then the slide 4iis turned upon its clamping bolt as a pivot so that it lies in the position shown in Fig. 2, when the radius 5, may be tuinied upon its pivot 5 and slipped under the strut g7. it be desired to change theinstrument from a right handed to a left handed square or bevel the radius 5 is'passed under the strut 7 until as indicated in dotted lines in Fig.

2 it projects from the other side of the base. Then ifdesired the radius slide 4. can again be pivotally reversed so that its end may be abutted against the end oi. the strut slide Occasionally it 'may be desirable to have means for aligning the base to a surface, other than those provided by the outer edges of the rails 1-1, and With this in view I vprovide the alignment lugs 8 and 9 secured respectively to the radius slide l and 1 -1 and thus provide alignment points for contact with a plane surtace.

strut slide 6. The outer flatsides of these alignment lugs When the slides land G -are set and centered by their clamping means, are flush with the outer edges of the rails The mode of operation of my improved carpenters instrument will be obvious from the foregoing description. The advantages tobe derived from it are that in a single instruiiient which is easily folded Within the compass of a simple straight edge the work man has a square or bevel which may be made to assume and therefore measure any angle from zero degrees to ninety degrees, in which the radius may. be made to pro1ect from-any point along the length of the-base,

and inwhich the radius may be shifted from i one side tothe other of the base at Will.

I claimrr V '1. In a carpenters instrument, the combi nation ot-a straight base having a straight vv v lengthwise thereof, a radiusslide, a redius pivoted on the radius-slide, a strut slide. a strut pivoted on the strut slide'and to the radius at a distance from the radius pivot, both said slides mounted to slide in the said way, and clamping means to set the slides on the base.

2. In a carpenters instrument, the combination of a straight base, a radius-slide, a radius pivoted on the radius-slide, a strut slide, a strut pivoted on the strut slide and to the radius at a distance from the radius pivot, and clamping means to set the slides on the base, the radius standing at a right angle to the base When the two slides are abutted against each other.

3. In a carpeiiters instrument,'the combination of a straight base, a radius-slide, clamping means, comprising a bolt, to set the radius-slide on the base, said radius-slide being pivotally reversible on the said bolt, a radius pivoted on the radius-slide to swing to either side, of the base, a strut slide, a strut pivoted onthe strut slide and to the radius at a distance from the radius pivot, and clamping means to set the strut slide on the base.

4. In a carpenters instrument, thecombination of a straight base, a radius-slide, a radius pivoted on the radius-slide at one end thereof, a strut slide, a strut pivoted on the strut slide and to the radius at a distance from the radius pivot, and clamping means to set the slides on the base, the radius standing at a right angle to the base when the lJWO slides are abutted against each other.

e 5. In a earpenters instrument the co1nbination of a straight base a plurality of slides wvith the slidablebase-pivot to fix the radius at a predetermined angle With the base.

Signed by me at Boston, lvlassacliusettsl this 18th day of May, 1920. l

FRANK Gr. C(JLE.

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