US1402629A - Circle rule - Google Patents

Description

V E. P. MANLY.

CIRCLE RULE.

APPLICATION HLED MAR-129, 1921- 1,4() 2,629, Patented Jan. 3,1922.

*1: I nRnEsip iefMAN Y, F ews aemgv emm;

' 'To'aZZ it m MW 1 t )citizen*ofthe United l'Stzttes,"residing et fPorts lnouth'; inftheje'ounty of Norfolk end State of Virginia; have. invented certaln new m and u s'efnlT Impro ements in; Circle" Rule;

I do herebyfdec1a1fe the following to be F full, clear, and exact"desoriptionjjoithe invention, such will enable *others'f skilled I and usethe seme.

} yTheiinvention providee'in single article e v Corresponding a fp 'arereferred ,meens'; for drawing straight j lines e'ny deti'minatedength 101' outlinin diameter Within the range 0% the device. 1 Y

The invention 1 de elatively adjustable points.

" parent and, suggest themselves lasthejneture Theinvention consists of a banthevingione or both edges straightifol dijreoting etylns'; Whendrawing streightlinesyseid'baro having j L 1 a longitudinal slot and being grednatedfon} z' s use as w'ruleiinlaying oflf Work. The :bafis as 'a centering element. f Afslidelisx edju st-d able Lon thefbar and is -a daptedto carry a, pencil for outliningkoiroles ;means-being pro- 1' 6 ,videdfor -securingtheslidein the j requl red,

provided at one end Withal point to bejiused Other objects andedyanteges W111 be ap- 7' of the invention is understood;

- 'Whfl e the drawings illustrate enqerhbodi-a "I'nentof the inyention flitis tofbe understood the-thin adapting the gamete meet difierent conditions and requirements,various'changes in the' form; proportion and' minoi' ydetails? of oonstructionqmey be resorted .to withont departing from the nature of the invention "Referring to fthe accompanying]drawing forming a p i f t e peoificatlon w f Figure 'l iis etop pl anivi ew of a cireleg rulei 11 1'1st1'z'n;ive oflthejnventiong 1 being brokenaway, y

Figure-3 I18 at cros ssection ion thefline i oiFigureL and:

'F'gnre 4c is a [detail perspective of the slide.

- to in the followi g desriptioniand g" noted in thes'eiieralgviews ofthe 1 by-like referenoe:charaoters.

The article comprises a bar Whichrnay be of anyleng h and cross seqt l lnel out in o SPeifie t'iQEof LettersiPatent egean n1 Marni {29, 15213115 11 1 16.45 562 Figure/fins an edge viewwthe eof;

drawings v 'radijusfof the eirc1etobesoribed 'I'lhe' serib ing ofithe circle iSyeffeeted by swinging the y g; I balyl about'theipoint k-es a oentefw1thh Qiipo it 'j e fild iedge dffthe ba I "1 I are' 'streight to enable the; wi e, tob l ised (as 21L rule-whenjdrgtwing straight -iineSL' i A slot 21extends longitudinally ofthebnrljto; Within 'ashort} distance of i the ends thereof. n The glongitildinahelot2 provides elearance;

for iape'ncil orletylus 3L pointi tds fp i'o g Y yidedzitoneiend ofthehaif flanldjfconsltitutee v T 1 a oentering element; (The ,b'ani s "proyide'd, -i in it length! with graduation? 5 preferably.) inches andyfrao ctionali para -enema to facilitate;the;'layingfoff fgwo'ikjan d *1e Jtermining easurements;

erebly tapers 'thfonghont?its'flengthQ being T b f 'lfP e -fl v widestet theend pfoizidedwith he Point 1: Y A re'oess 6l ifs;formedfinthe npperfside" U ofathe'vbep 1 inTl inefwiththflongitndinal 1 V slot-"2enditsfoppoeitelongitndinal wallsfzi re 'nnderout toprevent displacementof the slide 7 h v KOrEpenciI oarriei' 71disposedgin the reoesfig:

The recess 6 extends longitudinally of? the l jsi nd -is fedeptedto be doedat one {end ,byvm s o P 8; wh y reyi n i I had for' placin the: Slide 0p penoilfozirrietyf 7'in pos iti0nn heplatefifisvpi eventedfrom displecem ent by means of the point which -1 extends- .thel ethrlo'ugh. The slide/0r pencil Q o earrier'T preferably consists ofablockwhich ig pointed: and Icoopei'etes with the soele gredn htofretain' the slidefiaingthadjusted position";

f devi je const fieted' in gecbidanee with the presentlnventlon s adapted fonuse a rule, a; gage'or compass forscnbmgclroles.' I M The longitudinal edges of "-the ban 1 are adaptedto givefdirection to agpencih: pen or other stylus when drawing straight lines.

Fors oi'ib ing a, oirele, thebar l is held atone @endbymeans of the point, the slide LYiheing} adjusted t0 bring'the peno'i1 b r1 sty1ue3e dis-} 1 l tencepfrom-theopointl correspondingto the i dlsposedrecess closed; at one end, amarker point ofithe pencil 3 or lilze 'deiiice' 'incon- Itact Withthe surface uponwhich'the circle ;-is to be scribed. For usefas a gageflhe slide -7 'be adjusted to vary t he' distance be tween the point 4- and the .point'of the pencil according tethe distance to belmeasuied be:

I lsweelrl relatively "adjustabl points of'a g What is claimed i Y i 1; An instrument "of the class 'd'escliihed consisting of a bai haying a '"longitudinally carriage movable saidfrecess, a closure member 01 dispositionf ihisaid recess at; the

, said recess to} facilitate movement of the marker,a closure member; for disposition in olihe -jend v to prevent longitudinal. displacement of said carriage therefrom, an'da point serving,as compass centen -foir ihe bar,

securing said closure member 2. ;A n instrilmeilfi of the class described consisting-pf; a bar having a longitudinally disposed recess, marker carriagegmovable in said recess, said bar liaviilg a slot. below said recess to pieventdisplacemexit of said seryifig as; a "pointeg-a binding. memloer [mo inted the other end of tliecros s piece 1 and engageable against the bar-,said' plate having a marker-insert opening there through, said icross piece being cutaway oversaidopening, and apoint member serv- :ing as a; compass center for the bar securing said closure member to thebar; V instrument ofvthe class described consisting ofabar having a longitudinally 7 disposed recess, a marker carrier movable in sald ITGC BSS SELICl bar having a slotbelow sald recess to facllitate movement ,ofythe marker,a closuremember foii disposition. iIisaid 'ecess to preventl displacement ofsaid carriage therethi ough, s'a1d carriage having a jdoveta1led plate, sa drrecess confoimlng m shapeoo saidcarriagdial cross-piece on said p1atesoi erlapping ,the harf 'o i iopposit' sides of said recess, [oneendjofffsaid crossi-Ipie'ce mounted in tli'e other, ehdOf the cross-piece and eilgageable against .the bar, and said' plate havlng a marker insert iopemngihere- ;through. a V r a lntestimQ y whereof l'afixy's e Presence ftwo witnesses.

ERN

serving' as .a' pointer,;;aibinding member

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