US1599479A

US1599479A - Mitek amd eeamxntg instrument

Info

Publication number: US1599479A
Authority: US
Publication date: 1926-09-14
Anticipated expiration: 1943-09-14

Description

Sept. 14 1926.

MITER AND FRAMING INSTRUMENT 1,599,479 c. E. LowRY b Filed June 23, 1924 2'Sheets-Sheet. l

Patented Sept. ll,

was, n

MTER AND FRAMNG INSTRUMENT.

Application tiled .Tune 23, 1924..

This invention relates to mitering and y framing instruments, and it consists in the `position with relation to the turret.

novel `tentures hereinatter described and claimed.

An object of the invention is to provide in a unitary assemblage o-parts, elements and features, an instrument which maybe conveniently and accurately used as a rule, square, level, bevel., height gauge and depth gauge. i

lfith the above objects in View, theirsstrument includes a stock having a turret turnably mounted therein, and means Stor clamping the turret at an adjusted position with relation to the Stock. AThe turret and the stock are each provided with a level. A blade is carried by the turret and means are provided for securing the blade at aiixed The stock is provided with a bore, which may reA ceive and retain a scriber and a shaft centering head is carried by the blade.

ln the accompanying drawings:

Figure 1 is a side elevation ot the mitering and framing instrument.

Figure 2 is an enlarged side elevation ot' the stock oi' the instruniient illustrating the opposite side thereof, from that side shown in Figure 1.

IFigure 3 is a transverse sectional view ot .the instrument, cut on the line 3-3 oi ure 1.

Figure 4lis a. fragmentary sectional view through the turret of the instrument on the line 4.-4 ot' Figure 2.

Figure 5 is a perspective view ot a securing bolt 13 used in the instrument.

Figure 6 is a fragmentary side elevational view orn the stock ot' the instrument, with parts shown in section, and illustrating the scriber held in the stock.

Figure 7 is a perspective view of an end portion of a blade used in the instrument.

Figure 8 is a perspective viewiot a shaft centering head used upon the instrument.

As illustrated in the accompanying drawings, the framing and mitering instrument comprises the stock 1 having an upper corner portion 2 bevelled ofi at an angle ot 'forty-live degrees to the base line of the stock. The stock is provided at one end with a bore 3, which may receiveand retain the scriber fl. The stock is further provided with a spirit level 5. The stock 1 is provided vvith a circular opening 6. A turret 7 lits in the opening 6 and is provided with Serial No. 121,804.

an annular flange 8 which is externally threaded. ,A nut 9 is screwed upon the flange 8 and engages the threadsthereoif,

and is adapted to bear against the side olf.

t-he stoclr 1, whereby the turret i' is held at an adjusted position in the opening 6 oi the stock. A. spirit level l0 is carried within the flange 8 ot the turret. A blade 11 passes through the edge portion ot the turret 7 and is provided at its side with a longitudinally disposed groove l2. A bolt `13 passes through the intermediate portion oit the tur-- ret 7 and is provided at its ends with a lug 11i which engages the eind of the groove 1Q oi. theblade. The bolt 13 is provided at its side with a flange l5, which is adapted to tit in a recess provided in the turret 7, whereby the said bolt is restrainet against turning movement with relation to the turret and the blade. A nut 16 is screwed upon the outer end ot the bolt 13, and a Spying 17 i5 nteposd between the body mi` the turret and the nut and serves to hold the nut against turning movement withrelation to the bolt. A shaft centering head 2O is provided with a shank 21, which receives the edge portion of the blade l1, and which carries 4a bolt 22 similar to the bolt 13 hereinbetere` described, and whichv engages in the` groove ofthe blade and holds the shaitt cen-v tering bit at anadjusted position along the blade.

The `stock is provided with a graduations 23, the turret with graduations 2li. rl`he stoelr is also provided with a vseries of graduation's 25 and calculating tables 2G.

lt is apparent that the parte of the instrument may be adjusted with relation to each other and temporarily secured whereby the instrument may be used as a rule. square, bevel, level, height gauge and depth gauge. rlhe miter cut for `all polygons up to twelve ides may be obtained accurately and quicli- 'lhe tables which give the length of the sides oi all polygons up to twelve sides, with an inscribed and a circumscribed diameter series of of one i'oot, will prove to be otgreat assistance to the mechanic as a time saver.

The blade 11 is graduated on both sides so that it may be used as a rule,` independently or the stock 1. When the instrument is used as a square, the blade 11 is inserted through the edge portion ot the turret 7 so that the lug 1a on the end of bolt 13 ense ies oi" iuo y gages the groove 12 of the blade. The stock may then be slid along the blade so that said blade may be shortened or lengthened as desired. rlhe blade is then secured by tightening the nuts 16. By loosening the nut 9, the turret T may be moved until the line marked Pitch will coincide With the 90O graduation; the turret 7 is secured by tightening the nut 9. 'When used as a bevel, the

nuts

9 and 15 are loosened thus allowing both turret 7 and blade 11 to be adjusted to the angle desired, after setting is made both nuts 9 and 16 are tightened.

The instrument may be used as a level Without the blade, While With a blade of any desired length, a Vlevel of corresponding length is obtained b v inserting the blade and moving turret 7 until the line marked Pitch coincides with the 90O graduation, the level 10 on turret 7 Works in conjunction with the blade.

Villen the instrument is used as a height gage, the turret 7 is moved until the line marked Pitch Will coincide With the 90o graduation, and then clamped by tightening nut 9, blade 11 is then inserted and moved until its end is iiush with the base line of the stock 1, and then clamped by tightening nuts 16.

Wvhen used as a depth gauge, the turret 7 is moved. until the line marked c will coineide with the 90O graduation, and then clamped by tightening nut 9, blade 11 is then inserted and clamped at any desired place by tightening nut 16. The graduations 2d are used to lind the miter cuts, both right and left for all polygons from the triangle to the dodeeagon, inclusive; thus if it is desired to obtain the initer cut for a hexagon, move the turret 7 until the graduation 6 of the group of graduation 2d Will coincide With the 900 graduation. After clamping turret 7, place the base line of the stock 1 against the Work and draw or scribe a line against the blade. This line Will be the miter for the heaagon. The miter cuts for other polygons are found in like manner.

The graduations 25 are used to find the miter cuts of rafters for roofs of different pitch from one-tWenty-fourth pitch to pitch 1 or unity; thus if it is desired to cut rafters for a roof of 1/3 pitch, move the turret until the marked line of Pitch on the turret will coincide With one-third graduation 25 on stock 1; after clamping the turret place the base line of the stoel; 1 against the Work and draw a1 line against the blade. This line will be the bottom or sill cut. New by placing the end of the instrument against the Work and drawing a line against the blade, the top or plumb cut is obtained.

rfhe miter cutsI of other rafters for roofs of different pitch are found in the same manner.

Having described the invention, what is claimed is:

An instrument of the class described including a stock having indicia formed thereon and provided with a beveled opening having an annular shoulder formed on its larger' end, said indicia being arranged about said opening, a turret having an arcuately arranged series of indicia for cooperating With the indicia on the stock, said turret being rotatable in the opening and provided With a beveled end to be receivable in the opening of the stoel; and having a shoulder formed thereon for engaging the shoulder of the stock, said turret being provided with an opening concentric Within the beveled edge, said turret having a projection in its opening, said projection having a structure adapted to permit a spirit level to be carried thereby, an annular externally threaded flange projecting from the face of the turret adjacent the smaller end of the beveled edge thereof, a nut threadedly engaged on said fiange for abutting the turret and the stock to hold them assembled, a blade having indicia and extending from the stock, and means for attaching the blade to the turret.

In testimony whereof I aifix my signature.

GECIL E. LOWTRY.