US1944819A - Divider - Google Patents

Description

Jan. 23, 1934. C W WHITE 1,944,819

DIVIDER Original Filed March 24, 1930 INVENTOR ATTORNEY Patented Jan. 23, 1934 STATES UNIT PATENT OFFICE Application March 24,

1930, Serial No. 438,585

Renewed October 4, 1933 1 Claim.

My present invention pertains to a combined divider and compass for use by draftsmen and mechanics and my object is the provision of an instrument of this character which shall be of a simple construction, foldable to present a small package when not required for use and which will easily and successfully perform all of the functions required of a compass, a divider, a caliper or either an inside or outside gage.

To the attainment of the foregoing the invention consists in the improvement hereinafter described and definitely claimed.

In the drawing: 7

Figure 1 is a perspective view of the improvement to illustrate the manner in which the same is employed when scribing a circle 01' ellipse.

Figure 2 is a sectional view approximately on the line 2-2 of Figure 1.

Figure 3 is a sectional view approximately on the line 33 of Figure 1.

Figure 4 is a sectional view approximately on the line 44 of Figure 1, illustrating the instrument closed.

As disclosed by the drawing the improvement comprises two cylindrical or socket members 11. Each of the sockets, at the ends thereof, is formed with right angular parallel arms 2. The outer ends of the arms are round in plan and the rounded ends of one pair of arms are reduced or centrally formed with a knuckle 3. The round ends 5 of the other pair of arms are bifurcated to receive the reduced round or knuckle ends 3 of the first pair of arms therein. Combined pivot and binding elements, in the nature of screws having knurled heads 4, are passed through threaded openings in the round ends 3 and 5 of the pairs of arms 2.

The sockets, preferably from their inner faces are centrally provided with transverse threaded openings that communicate with their bores and screwed in these openings there are headed bolts 6. These bolts contact with the leg members 7 and 8 which pass through the sockets and the leg members have pointed ends 9. The short bolts 6 are screwed through the sockets tobind both of the legs in the sockets when the device is employed as a scriber or as an instrument for scribing a circle. One of the bolts 6 binds the leg 8 and the second bolt is unscrewed to release the leg '7 when the instrument is employed for scribing ellipses. The leg member 8 is longer than the leg '7 and has its non-pointed end provided with a knurled head 10.

To scribe a circle on a fiat surface the dividers are opened as an ordinary door hinge until the points of the marking legs are arranged at a desired distance apart. The bolts 4 are screwed home to hold the frame sections at the desired angle and likewise the bolts 6 are screwed through the sockets and contact with the legs. The leg 8 is rotated to cause the leg 7 to travel therearound and the circle is scribed in a manner such as usual with any ordinary device.

To scribe an ellipse, the points of the legs are set the proper distance in a manner as above described and the frame for the dividers is looked, as above described. The leg 7 is locked by the bolt 6 in its socket, while the frame is movable on the leg 8. The leg 8 is arranged at a desired angle, as disclosed by Figure 1 of the drawing and is held at such angle by one hand of the operator. The operator turns the frame with the scribing leg 7 on the leg 8, thus causing the scribing leg 7 to scribe an ellipse as shown by the dotted lines in said Figure 1, the frame traveling up and down on the leg 8 during the turning of the frame and scribing leg 7 around the fixedly held leg 8.

The simplicity of the construction and the advantages thereof will, it is thought, be apparent tothose skilled in the art to which such invention relates so that further description will not be required.

Having described the invention, I claim:

An instrument for the purpose set forth, comprising a pair of socket members having their ends provided with rightangle extensions whose extremities are rounded for interfitting engagement and which extremities are connected by headed bolts, leg members received through the respective sockets and each having one of its ends pointed, one of said leg members being of a greater length than the other and having its nonpointed end provided with a knurled head, and bolt members screwed through the sockets for contacting the legs and holding both of said legs adjusted in the sockets or one of said bolts designed to bind one leg in its socket and the second bolt when partly unscrewed permitting the other leg to slide through its socket.

CHARLES W. WHITE.

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