US1409342A - Combined protractor and scale - Google Patents

Description

H. HENRICHS.

COMBINED PROTRACTOR AND SCALE. APPLICATION F|LD1uLY22.1'919.

1,409,342. Y 1 PatentedMa1-- 14,1922.

2 SHEETS-SHEET l'.

H. HENRICHS. COMBINED PROTRACTDR ANI)` SCALE. APPLICATION mib JuLY22,1919.

1 409,342, Y Patented Mar. 14, 1922.

2 SHEETS-SHEET 2.

.will/'ill UNiTEn s'r'r TNT orare HERMAN HENRICHS, OF ST; LOUIS, MISSOURI. n

lGGMIBINED '.PROTRACTOR AND SCAIE.`

To allfwwm lima/,1] fo/noemt: i

-Be it known thatI, HERMAN HnNRIoHs, a citizen of theUnited States, residing at the city of StLouis, inthe State 01E-Missouri, have invented'certain new and' useful Improvements: in Combined Protractors and Scales, of which the following is 'a specification.

This invention may be called a combined protractor and scale, and has for its object the provision of a mathematical instrument adapted to assist in the correct alinement of -holcsl for bolts, rivets, and the like in structural steel or iron work-or the like.

In the accompanying dra-wings forming part o this specification, in which like num# bers of reference dcnotelike parts wherever they occur, Y Y

Figure 1 is a' top plan view or' this instru-e ment; v

Al3`igure 2 isa side elevation showing the beams, uprights, struts, and plates used metal frame-works for buildings;

Figure 3 is aefront elevationv of this instrument, looking at it in the way indicated' by the arrows in the line in .Figure 1; and

Figure 4 is a sectional viewtaken on the line 21e-4.- in ligure v1, looking in the direction of the arrows. L Y

Heretofore, ithas been a diflicult, tedious,

and time-taking job correctly to lay out in alinement the bolt or rivet holes for the various parts in the metal framework of buildingsand the like, and this work'has necessi` tate'd the laying out of such work in full size on a shop floor orsimilarfplace. This. hasV required large space and tiresome crawling and stooping. With the present instrument, given the height of the upright or the distance of one beam or-cross-piece from another, the scale-bar 1 can be so:moved-=uponf the perpendicular bar 2` as tol give the same effect of distance als in the actual construction, and by moving the protractor-armsl 3 and l to an appropriate place upon the Y scale-bar 1, the same relative angle Jfor the dimensions given will be assumedv by the protractor or scale arms 3 andai, relative tok the scale-bar 1 and relative to the degrees scale 5, as will be occupied by the struts 6 and 7 inthe actual construction shown Figure 2.

By means of the degree scale 5, the exact degree of angle of the arms 3 and ltto the base-scale arms 8 and bar l (or to the perpendicular arm 2) will be determined; and

inV

VSpeeication of Letters Patent. Patnted 14, 1922.

Application filed July- 22, 1919. Serial'No. 312,519.

that' angle once ascertained is'fthe same for` i vvthe holes for bolts VQand bolts 10 and is Ylikewise the same forholes-for bolts 11, 12,13, 14, andrl. The angle having been thus de-` termined,fit is necessaryonlyto mark the Vmetal parts, without actually assembling the same, and, when elevated tothe position where they are to be assembled in a building framework or the like, it will be found that, the angleof the holes having been thus i mathematically ascertained, the holes are in alinemcnt and readyv for use.

l 'The perpendicular bar` 2 is preferably Y iixcd' tothe center plate 16 carrying the degree scale 5. Thebase-scalearms 8 are pret`- erably pivoted to the screw 17. The arms 3` andtf are pivoted on'the said screwl 17, and

8' rigid and lengthwise, to holdA the armsl 3 and41igid when desired, the lower end of .each 'of fthe said thumb-nuts 194 being equipped withV al notchedvnut v20, the 'lip 21 of which underlies and ridesv upon'theunderneath edge or the periphery of the degree scale Ordinarily, [the base-scale armsS will be lined rigidly 'whena job is begun, and' will remain asabase linefwh-ilethearms 3 and t are free upon their pivot v17'. Y

. VThe ba-rf 2" is composed of a relatively flat sro Arm 1 ris freely slidable Aupon the Aperscale-part 23 and a'tra'ck 24 adapted to slide inthe groove 25 in the gripfmember 26, to

which bar'l isattached Yby screws 27,: which grip-member is also pierced'by thumb-screwV 22. for holdingthe'bar 1v stationary upon bar 2 'when desired. f

4It willbe observedl that the entireiinstru-V.

meintcan be knocked down. so. as to: be' comprised'within very small space o'ra'smallr case or package. by removing-bar'lfr'om bar v 2i'and swinging arms 8 and arms '3 and t parallel with bar 2 and' laying the separated Y armi: 1 alongin the same direction.

' Having vthus Y described this invention, hereby reserve the benefit of alli-'changes'in" form, arrangement, order, ory use of parts as it is evident that many' minor changes may be made therein without departing from thespirit of this invention orl the scope of the following claims.

The terms perpendicular transverse,

pivoted, and base-scale as usedhcreiu are predicated on the assumption that the two base-scale armsy S are vin the position shown in Figure l and that the bar 2 extends at a right-angle thereto, as shown in Figure l. rihus the scale-bar l extends transversely tothe bar 2 and the bar 2 is perpendiculm' thereto as Well as to the basescale arms 8. rfhe arms 8 and the arms 3 and i are pivoted on screwlT relative to the position of the said members shown in Figure l. The relation of the bar 2 is fixed relative to the center-plate 1G, which carries the degree scale Thus arelatively stationary frame is provided by combination of the bar 2 and the center-plate i6. its the scale-bar l is fixed to bar 2 against pivotal or lateral movement and is Vmade longitudinally slidable thereon, the bar 2 occupies permanently the relation oi perpendicularity to the scale-bar l. rhis enables the position of the arms 8 to be determined accurately as being either parallel to bar l and simultaneously perpendicular to bar 2 or as being at a different angle. -Fio'ure l shows the instrument as laid out beiore the user ready for use, and in that sensethe arms 8 Will be regarded substantially as its base. The pivotl and the mode ot' attachment thereto of arms 8 and arms 3 and 4 allovv movement of any one of the said tourarms inIapivoted manner ori/screw 17 lto any angle relative to the vitixed members l and 2 and the degree-scale 16. v

lclaim: y y l l. In an instrument ot" the character described, the-combination ot'a member having a scale thereonffa second scale member adapted to be moved relative to the said first mentioned scale-member, a pivoted scalearm adapted to co-operate with the said second scale Ymember to determine dimensions, a degree scale iixed relative to the said first'- mentionedscale member and a pair of arms pivoted 'with krelationto the said first-mentioned scale member.y l

v2. In an instrument ot the character described, the combination of ai member khaving a scale thereon, a Vsecond scale-member adapted to be moved relative to the said Yti'st-mentioned scale-member, a pivoted scale-arm adapted to co-operate With the said1 second Yscale-member :to determine `dimansions a degree scale fixed rela tive tothe said tiret-mentioned scale member a4 pair of arms pivot-ed with relation to the said-firstmentionedA scale member, and a base-scale arm attached to one or more of the aforesaid members.

3. In an instrument of the character described, the combination ot a member having a scale thereon, a second scale-meniber adapted to be moved relative to the vsaid first-mentioned scale-member, a pirated scale-arm adapted to co-operate with the said second scale-member toVdetermine diinensions,y a degree scaleixed relative'to the said first-mentioned scale-member, a pair ot arms, and a-base scale arm also pivoted with relation to said first-mentioned scale member, said degree scale being adapted to determine the angle of said pair of arms.

4. In an instrument of the character described, the combination o'c' a member having a scale thereon, a second scale-member adapted to be moved Arelative to the said first-mentioned scale-member, a pivoted fscale-arm adapted to co-operate With the said second scale-member to determine dimensions, a degree scale iixed relative to the said first-mentioned scale member, a pair of arms, and a pair of base scale arms also pivoted with relation to said first-mentioned scale member, said degree scale being adapted to determine the angle oi said pair of arms.

In an instrument oi the character dcyscribed, the combination ot a member having a scale thereon, second scale-member adapt-ed to be moved relative. to the vsaid first-mentioned scale-member, al pivoted ber extending transversely across the irstnamed member and having a groove in its intermediate portion slida-bly cooperable n with said ytrack whereby to permit adjustment of such transverse scale member along the tiret-named scale member, means for temporarily securing the-transverse member relative to the other scale member, a scale arm pivoted to the plate and movable freely 'with relation to the transverse scale member, and a degree scale carried by the plate and eooperable with the pivoted scale member. .l f i y ln testimony whereof I .hereunto aiiix my signature. I

HERMAN nnnnicns.

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