US1601138A - Carpenter's scribing gauge - Google Patents

Description

Sept. 28 1926. 1,601,138

D. Moons CARIENTERS SCRIBING GAUGE Filed March e. 192e 2 'sheets-sheet 1 ATTORNEYS WTNESSES .I

Sept., 528, 1926. 1,601,138

D. MOORE GARPENTERS SCRIBING GAUGE- Filed March 6, 1926 2 Sheets-Shea?I 2 lNvENToR gnb/700,75

gllNE-SSES K ATTORNEYS i j ples.v

Patented Sept. 28, 1926.

terna DAVID MOORE, OF SOUTHVLANCASTER, MASSACHUSETTS.

' t onErENrEns scarnrive GAUGE.

f Application med March e, i926.v serial No. 92,919.

. This invention relates to improvements in measuring instrumenta being yadapted particularly for use in carpentry, and it consists of thel constructions, combinationsA and arrangements herein described and claimed. yAn object of the invention is to provide a socalled .scribing gauge which consists mainly of anextensible body carrying scribing plates and protractor heads at the ends for :numerous .uses in carpentry, among which cutting stair threadafitting shelves and baseboards, etc. may be cited as exam- Other objects and advantages willap'pear in thefollowing specification, reference being had to the accompanying drawing7 in which f Figure 1 isl a Yscribin'g gauge.

VFigurev2is a side elevation.Y y Figure 3 is a detailsection of one end of the gauge' taken substantially "on the line 3-3 of Figure 1. 5

Figure 4, is a detailxcross section of one plan view ofthe improved of the clamps taken on the'/ line 1 4 of Fig- 'A ure 2, Y

Figure 'i's a detailplan tensible end of the gauge, y

Figure 6 is a .detail cross section on the line 6 6 of Figure 5, "y f Figure 7 is a detail plan view of one vof the paper covers for the scribing plate,

viewl of the ex- Figures 8 and 9 are detail plan lviews illustrating the method of employing the paper coversin producing' and copying a profile.

l'n carrying out the invention provision is madeL of a main body 1 which, because of the fact that it is preferably composed of relatively movablebars 2 and 3, is herein known as the extensible body. These bars carry loops 4 and 5 which embrace the complemental bar as shown in Figure 2 thereby serving to guide the' bars as they are slid relatively to each other when making adjustments of the gauge between points. A clamp 6 fixes the adjustment of the extensible body. This clamp is similar to the clamps 7 ,I referred to later, buthas the distinction of serving the solel purpose of holding the bars of the bodyv together. clamp includes a plate 8' upon which the thumb screw 9 bears. The plate has end luUs 10 which ride in slots 11 forl guidance. titiated at the extremities of the rextensid bla body are protracter' headsl2 'the upstandiug portion 25 is borne lsupport a pair of studs The These include cross bars 14 which have lugs 15 by which pivots 16 are mounted. The pivot 16 in the case of the protractor 13, is carried by an extensible end 17 (Fig. 5) which `is slidable upon the plate 18 of the adjacent clamp 7. .The plate'19 of the other clamp 7 is different. The plate 18 has bent edges "2O (Fig. 6) `in whichthe flanges 21 of the extensible end 17 ride. i

A slot 22 Vin the clamp plate 18 receives the screw 23 of the clamp nut 24. The extensible end 17 has an upstanding portion 25 l through which the screw 23 extends. The extremity of the upstanding portion terminates in a pointer 26 which is spaced from the surface of the end 17 a sulcient distance to receive the protractor 13. The calibrations of the protractor can be read in reference to the pointer, and upon turning down upon thenutg21l lthe pointer end vof on the' protractorhead, therebyr clampingit in the desired adjustedposition. Y i In respect to the protractor 12 the extensible end'feature', :described'in connection with the protractor 13, is omitted. The clamp plate 19 has an upstanding portion 27 terminating-ina pointer28, thescrew 29 passing through in the manner already described and carrying a nut .30 by means of which the` adjustments of the protractor 12 are fixed. l

Each-of ythe scribing plates 31 has a sufliciently wide flange 32 along' the edge opposite to the numbered calibrations showmto 33 upon which nuts 34 are screwed. the scribing plates in firmly fixed positions upon the crossr bars 14, but either or both pairs *ofA nuts may be loosened sufliciently to rpermit the insertion of a paper cover 35 (Fig. 7)A beneath that part of the cross bars 'falling to that side of the studs within the scribingl plates. In other words, the paper covers l35k are thesame in size as the scribing plates, and are. intended to be clamped in placeupon the plates for a purpose such as'illu'strated in one instance in Figures 3 and 9L The paper covers 35 have notches 36 to Vreceive the screw studs 33. Y

Tt'jhas been stated that the clamps 7 are identical with the clamp 6. The exception vbe noted that the clam s 7 have clamp plates'18jand 19 whereas tie clamp 6 has not. Slots 37 in the sides of the clamps 7 receive the lugs 33 efv small plates 39 upon `down up- These nuts ordinarily hold which thumb screws 4() bears. ot the clamps 7 is to permit removal of the extensible body 1. A single bar may be employed, or if the relatively movable bars 2 and 3 are not suiiiciently long to ,permit a desired adjustment of the gauge they may be replaced by longer bars which in that instance will be inserted in the clamps 7.

j The operation is readily understood. Although the drawing illustrates the use of a pair ot relatively movable bars 2 and 3 as the main body ot the gauge, it should be understood that in some instances it is preterable to use but a single bar, and in that connection the use ot the clamps 7 has already been described. The double bar ar-r rangement has the advantage of permitting numerous adjustments of the gauge, and in practice it u'ill be optional with the ,carpenter ivhether one or the other of the two arrangements is employed. I M,

The uses of the gauge in lcarpentry are so numerous that it Would be ditlicult to name all ot'. them. One or two examples ivill be suticient. Say that a number ot vshelves are to be i'itted in a closet. The gauge is placed in the position tobe occupied by the shelves and extended until the scribing plates 31 touch the ivalls at the longitudinal extremities of the space. The gauge is then removed and laid upon va pile of boards (assuming that a number ot shelves-,are to be cut.) the upper one of whichis marked oit' across the edges of the scribing plates.

It may be that one end Wall is not parallel with the other; In such casey one or the other ot the clamp nuts can be loosened and the respective scribing plate 31 adjusted upon the ypivot 16 until it tits Hush against said Wall. The same mode of operation applies when fitting baseboards in closets and small rooms, cutting stair treads, etc. The gauge is also adapted to fitting box or Window casings, and in such event the scribing plates 31 arel removed from the cross bars 14 oi the protractors 12. and 13. The cross bars will then serve the same :tunetion in respect to iitting the ivindoiv casing as did the scribing plates 31 in the other uses mentioned. l

a A further and important use is illustrated in Figures 8 and 9 wherein the paper cover 35 is involved. Reference is made toFigures 8 and 9. The carpenter may find it necessary to tit a board against a curved surface such as illustrated at Lt1. A paper cover is clamped upon one of the scribing plates, and the gauge is adjusted until the scribing plate is brought to the curved surface in about the relationship shown. The dividers 42 are iixed in about the position shown, one leg being run along the curved surface while the other traces a line upon the paper cover. 7 L.

It is intended that the paper cover shall be The purpose ot suiiiciently heavy material to permit considerable pressure to be brought upon the scribing point of the dividers, thereby mal:- iiig a line sutliciently deep to be retraced when the gauge is transferred to the board B in Figure 9. Having transferred the gauge the carpenter traces the previously inscribed line with'on'e leg ot the divider While the other leg is made to trace a line upon the end ot the board. Upon care'l'ully cutting the board along the traced line the carpenter ivill have a profile which is the exact duplicate ot the curve 111. In some instances it maybe ioimd well to cut the paper cover along the line inscribed thereon, but whether or not this is done is optional with the carpenter. On the foregoing principle the paper cover may be employed to cnable litting boards up to almost any hind of irregular surface, audit is immaterial Whether the lines of such surface he straight or curved.

lVhile the construction and arrangement ot the improved carpentens scribing gauge is Vthat of a generally preferred form, ob-

viously modilications and changes may be made ivithout departing from the spirit of the invention or the scope o't the claims.

I claim 1. A gauge comprising a main body, plates having clamps by means of which they are affixed to the extremities ot the body, a protractor head having a cross bar and lug through which pivotal support is had upon each of thefclamp` plates, scribing plates having studs insel-table through said cross bars and nuts upon said studs for clamping the scribing plates in position upon the cross bars of said protractor head.

2. A gauge comprising a main body, a protractor head having a cross bar tor cach end of the main body, clamping means by ivhich the protractorkheads are applied to the extremities of the main body.` said clamping means comprising a plate upon which one ot the protractor heads is pivotally mounted at the cross bar theree t, and an extensible end upon which the other protractor head is pivotally mounted at the cross bar thereof, said extensible end being adjustably carried by a clamp plate ot the associated clamping means; a scribing plate 'for each protractor head, and means to remorably clamp the scribing plates to the cross bars of saidheads.

3. A gauge comprising a main body` protractor heads for the ends ot thevbody, clamping means by which the protractor heads are attached to the extremities ot the body, lsaid means including plates, means by which the protractor heads are pivotally mounted upon the respective plates, upstanding portions formed from said plates 'terminating in pointers being in spaced relationship to the plates thereby providing a llt) space in which theprotractor head can move,

and means associated With the plates and' lupon 'the protractor heads When the latter are adjusted upon their pivots.

A. A gauge comprising a main body, protractorI heads for theends of the body, means for clamping theprotractor heads upon the extremities of the body, said means including plates, means pivotally mounting the proti'actor heads upon the plates permitting turning of the heads, an upstanding portion stamped from each plate terminating Vin a pointer in spaced relationship to the respective plates and providing a space in which the protractor can move, a screw carried by the plate and passing through the respective pointer at one side of the .protractor head,y and a nut upon each screw permitting clamping down upon the pointer thereby to hold the respective protractor heads in the position to which it has been adjusted upon its pivot.

5. A gauge comprising a main body, a protractor head for each end of the body, clamping means by which the protractor heads are secured to the extremities of the body, sai-d means including` plates, cross bars included in said protractor heads having lugs which are pivotally mounted upon said pla-tes, scribing plates atta/hable to the heads along one edge, screw studs carried Y by said flanges passing through openings in the cross bars of the nuts upon said screws for clamping the scribing plates in position against the cross ars. 6. A gauge comprising a main body, scribing plates mounted upon the extremities of the body, a cever lfor each scribing plate permitting the inscription thereon of an irregular surface to be fitted, and means to clamp said cover in respective scribing plates.

' DAVID MOORE.

protractor hea-ds, and

position upon the Y

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