US559559A - Julius e - Google Patents

Description

(No Model.)

J. E. WORTHEN. GIROUMFERENTIAL DIVIDERS.

Patented May 5; 1896.

5 E 5 E E UNITED STATES PATENT FFICE.

JULIUS E. IVORTI'IEN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO LEVI L. TOlVER, OF SAME PLACE.

CIRCUMFER ENTIAL DIVIDERS.

SPECIFICATION forming part of Letters Patent No. 559,559, dated May 5, 1896.

Application filed September 19, 1895. Serial No. 6 62,998. (No model.)

To otZZ whom it may concern.-

Be it known that I, JULIUS E. WoRrnEN, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Circumferential Dividers, of which the following in a specification.

The object of my invention is to provide a cheap, simple, convenient, and accurate or efficient device for spacing or equally and uniformly dividing the arc of any circle into any predetermined number of segments or parts; and it consists in the construction, combination, and arrangement of the parts of the same, as hereinafter more fully described and claimed.

In the drawings hereto annexed, which form a part of this specification, Figure 1 represents a top plan showing a pair of circumferential dividers constructed according to my invention. Fig. 2 represents the reverse side of the same, showing a modification of a structural portion connected therewith. Fig. 3 represents an edge elevation of the same, showing a portion of sliding point-socket re moved.

In carrying out my invention 1 construct a pair of dividers having legs A and B, pivoted or jointed together, so as to open and fold in the usual manner, and may be set and held in position at any desired point in relation to each other by a milled head or compression thumb-nut C, which may be operated upon I one portion of the screw-thread pivot D,Which extends beyond the said joint at each side,or opposite faces, and forms a piercingpoint N about which the said legs A and B may be rotated or moved when in operation, as here inafter described. The pivoted end ofone of the said legs A or B is extended beyond the pivotal point and formed with a sectorscale or protractor-plate E,havin gone or more series of scales, graduations,or degree-m arks, as shown in Fig. 1. The other or opposite leg is also extended obliquely and formed into two indicator-points H and K, one at each side of the said protractor-plate E, which is provided with different scales or divisions or degree-marks upon each side, so that one point H might'indicate,wl1en set, say, fortyfive degrees, and the corresponding opposite point might indicate on the opposite side of the said protractor-plate scale a section represented by 8, showing eight equal divisions of the circle or circumference being spaced or divided into segments, as hereinafter described. I

Now in order to facilitate the operation of dividing a given circle or circumference of a circular body into any predetermined number of equal segments, I provide each of the said legs Aand B with adjustable or sliding sharp points F, projecting downward from their square sockets G,which fit upon the said legs A and B and are temporarily secured at any desired point thereon by thumb-screws L, as shown and hereinafter described.

Now in order to provide a more perfect adjustment whereby any variation may be reduced to a minimum, I secure to one of the said divider-legs, near its point or lower end portion thereof, a curved protractor P rigidly at one end. The main portion of the curved protractor P is marked with a scale of divisions, degrees, or sections, as above described, and upon one or both sides thereof, as may be desired, so that when the opposite leg is moved toward or from the other the said curved protractorbar P would indicate the relative positions of the said points F to which they should be adjusted and secured for the purposes of dividing the circumference of any circle and determining the number of arcs of the same, as before described in re lation to the said protractor-plate E and indicator-points H and K, of which the curved protractor-bar P is designed as a modification bywhich same results maybe obtained when applied in operation,as hereinafter described. Now it Will be seen and understood that any circle or circumference to be dividedin equal sections or segments is drawn upon paper, the point- N is placed in the center thereof, then the point F is slid on the leg A to coincide with the circle formed, then the leg B moved so as to bring the indicator-points to the desired marks on said protractor-plate E, and secured in such position as to show the desired result.

Having thus described my invention, I operate substantially as described as and for c1aim the purposes set forth.

The combination with the pivoted divider- T T m legs A, B, of the pivot-point N, the indicator- JULIU S 5 points H, K, protractor-plate E, adjustable Vitnesses:

sliding-sockets G,having points F,and curved SYLVENUS TALKER, pron-actor P, all constructed and arranged to LEVI L. TOWER.

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