US2326412A - Double divider - Google Patents

Description

Aug. 10, 1943. 4. TAYLOR 2,326,412

nousw DIVIDER Filed April 11, 1942 4/ F76. 8 \NVENTOR ATTORNEY Patented Aug. 10, 1943 2,326,412 DOUBLE DIVIDER Jack Taylor, Yavapai County, Ariz."

Application April '11, 1942, serial- Not. 433t zroi ims. ((133 189) This invention relates to double dividers used by sheet metal workers in various kinds of work in laying out patterns and stretch-out sheets and has for its objects.

First, the provision of a double two calibrated fiat beams e'xtensible'irom a central body portion and provided with means for engaging the position of the beams in said'body, together with marking or indicating points at the outer end of said beams, aiidmarking or indicating point at a definite positio'non said.

body. The body portion and holders ior the indicating points at the ends of the beams are all designed so that the device'will lay fiat on sheet metal work or'on layout sheets.

An additional object is to provide means "for fine adjustment of the end marking points within limits independently oi the beam setting.-

A still further cbject'is to provide adivider, as above described, having vertically adjustable measuring points adapted to slide within grooves in a guiding T so that by using. oneof'the end points as a marker and the other two points as guides, the marking'point can b'e made' to describe elliptical curves corresponding to the set tings of the other two points as they move in the horizontal andvertical grooves of said T guide. 1 i v Other objects will appear hereinafter. v

i attain the foregoing objects icy-means of the device illustrated in the accompanying drawing in which,

Figure l is a plan view of the divider;

Figure 2 is an elevational view thereof;

Figure 3 is a section'taken substantially lines 3--3, Figure 2;

Figure 4 is an end elevation shown in Figure 2;

Figure 5 is a section line 5-5,Figure 1; V a 3 71 Figure 6 is a section taken substantially on line 66, Figure l, drawn on a somewhat enlarged scale;

Figure 7 is a plan view of a demountable type of T guide which is readily adaptable to use with the above divider for purposes hereinafter described; and

of left divider having ceive the beams 5 and 6 respectively, with an slots 3 and! respectively, out throughout its dle portion. j These slots are proportionedto re.-

easy, sliding; working fit. Twoiset screws! and 8 are provided on the reariace of'the body 'Z to hold these'beams. in.any"longitudinalposi+y tion desired. Extending from the rightfhand end of the body po'rtiona'sview inFigure l is a'marking point supportinglug J53, carrying, the marking point H. 'This'is broughtout sons to be aligned longitudinally with the markers in the end of each of the beams 5.and:6.'

.The markers at the ends of; the beams are made alike and with interchangeable. parts and consist'of ,a screw portion I2 having a knurled knob l3 at the topia'nd-a hardened steel trammel point !4 at the :bottom. [The threaded portaken substantiallyon Y tionis received'by 3,0011%!"15 attached to a supporting bracket 18' which-is attached to'and made part or" a block .i'i-and this, in, turn, is

attached to'an'd longitudinally adjustable-relative to the end of the beam to whichit; is at tached. I 1 l y 'Supportingand adjustment means for these blocks on the sliding beam" is shown particu-. .larly in Figures 1'- and 6." Here it is noted that in the end'of the beam While thethreadedjpor tion works-in'block IT to orgfrom,the he'amend. An additionallongitudinal guide, member con;-

sists of a 'pin 2fi'setinto bIOCk', H' and sized to v a workingfit in aghole 21,:drilledintotheend :ofthe beam.x j 7. I LEach of the marking-pointsis provided withga set screw 39 so that after its height .relativeito thework on which the device" is placed is set,

Figure 8 is an end view of the vertical memparts in all this may be set and maintained. The marking point supporting blocks I! at the end of each beam are substantially the same, being made 'right and left accordingly, except that since The guide T shown in Figures 7 and 8, is

used with the divider in markingand laying out curves. This consists of a central portion 33.

having horizontal detachable arms 34 and 35 on each side, and a vertical piece 3'! extending at right angles from its middle. The removable portions are held onto the central portion by removable pins 36 at each joint. A horizontal guide groove 45 extends across the face of the horizontal bars and central portion, and a vertical groove 45 extends along the top of the vertical piece 3'! joining an aligned groove in the central portion 33 which intersects the horizontal groove 45. Aligning indicating tabs or points 4| are formed at the end of each of the three arms, with their points registering with the bottom of grooves on the faces of these arms. Long or short arms may be fitted onto the central arc to be drawn.

In use, the blocks I"! supporting the tram'mel points at the ends of the beams are ordinarily set up tight against the beam ends so that the readings on the scales 31 .011 the beams "may be read directly from the right edge of block 2', if

I desired. Where, for examplameasurements'are to be transferred from a triangulation layout to a stretch-out sheet, the set screws *l and 8 are released so that the "beams will sl-id'e and the major or longer distances taken between the tramm'e'l point H on the body 2 and the trammel at the end of beam '6. Set screw 8, being adjusted when necessary to maintain this distance after transference of the measurement. At the same time the minor measurements of the triangulation are taken between trammel point II and the point at the end of beam 5. The adwhere a certain width of sheet by one end of the divider and the marking of the lap by using the other end of the divider. Either end of the divider can be used as th marking arrangement where the device is used as a beam compass. It is understood that each of the trammel points may be replaced by a pencil of suitable material or a soapstone marker; these being held in either case by the set screws 30.

Where the device is used to draw an irregular or elliptical curve the guide T is set on the work with the horizontal points 4| at either end of the horizontal guide bar 40 aligned with the major axis of the curve. Point 4| on the vertical bar is portion 33, depending on the dimensions .of the them where the difference between the transfer 1 I: or 8) turned up'and "the other measurementris then taken. Bothma then be -transferred to the stretch-out sheet. Eachfmeasuremerit ma'y be taken without disturbing the other. Where the use of scales BI is unnecessaryand'the diffe ence in successive measurements is-small us'eis made'of the adjusting screws 20 at the e'ndsof thebeams.

Other uses include the marking o f diinensions the T is made to coincide with th minor axis 7 of the curve.

The train'mel point at the left end of the divider is placedin the groove 45 at its intersection Withgroove 46. Point H is placed in the groove 4'5 'at'a focal point to the right of this intersecgtion. The rig-hthand marking tr'ammel is then moved following the curve while these points slide in the grooves. The point at the left end of the device moving down the groove '46 and the point i l moving to the left along groove 45. The

result is that the marking point at the right-describes aneellipticalcurve corresponding to the sejttingsof the other two points on the major andminoraxes as represented by grooves 45 and 45 respectively, in the'g-uiding T.

I realize that to those familiar with the art numerous modifications and changes may be sugbody so as to be longitudinally slidable therein.

removable tramm-el points adjustably supported at the ends of said beams and means for separately locking saidQbeams in any gdesired extended position; a r

2. A double divider comprising, in combination, a centrally positioned 'bodyjpo'rtion having longitudinally extending dovetail slots out in its top and bottom respectively, its bottom "formed to lie fiat on layout work and a removable trammel point attached to its front edge,-slidable calibrated beams slidably operative in "said slots in said body, trammel point blocks attached to the ends of said beams, means for longitudinally-ad :justing said blocks relative :to the ends of (said beams, removable trammel points threaded into said blocks, and lock screws :operative in said block adapted .toretain eitherjof said beams :in position in said block. v V Y JACK TAYLOR.

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