US891066A - Dividers. - Google Patents

Description

PATENTED JUNE 16, 1908.

A. JLHIBBETT.

DIVIDERS. W

} APPLIOATION FILED NOV. 30, 1907.

INVENTOR a. J fl'bberfi WITNESSES ANDREW J. HIBBETT, OF PIKEVILLE, TENNESSEE.

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Specification of Letters Patent.

Patented .Tune 16, 1908.

Application filed November 30, 1907. Serial No. 404,497.

To all whom 'it may concern:

Be it known that 1, ANDREW J. HIBBETT, a v citizen of the United States, residing at Pikeville, in the county of Bledsoe and State of Tennessee, have invented certain new and useful Improvements in Dividers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in dividers or compasses and more articularly to that class adapted to be used or describing circles or parts of circles and my object is to so construct the dividers that they may be employed for marking upon a black-board.

A further object is to rovide means for securing chalk or other ob ects to the arms of the dividers and a still further object is to provide means for securing the arms in their adjusted positions.

Other objects and advantages will be hereafter referred to and more particularly pointed out in the claims.

In the accompanying drawings which are made a part of this application, Figure 1 is a side elevation of my improved viders, showing one of the arms thereof containing chalk and the opposite arm, an anchoring point. Fig. 2 is a sectional view on an enlarged scale, as seen on line 22, Fig. 1. Fig. 3 is a sectional view on an enlarged scale, as seen on line 3-3, Fig. 1, and, Fig. 4 is a sectional view as seen on line 44, Fig. 1.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 and 2 indicate the arms of my improved dividers, the upper ends of which are pivotally secured together by means of a hinge 3, while the lower ends of said arms are provided with sockets 4, which sockets are adapted to receive various articles, such as sticks of chalk 5 on a bearing point 6.

The sockets are formed by drilling holes in the ends of the arms 1 and 2 and as the objects introduced into said sockets are normally larger than the diameter of the sockets, the walls 7 of the sockets are divided into sections by forming slits 8 longitudinally through the slots and lengthwise of the sockets so that the sections of the walls may expand when the objects are introduced into the sockets.

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The objects are securel held in the sockets 4 by means of rings 9, wfiich rings are introduced over the walls of the sockets and are prevented from casually leaving the walls by providing enlarged portions 10 and 11 at the upper and lower ends of the socket, said enlarged portions being larger than the openings through the rings, so that when the rings are introduced over the lower ends of the sockets 4, the same will be held in position thereon, the sections of the walls 7, containing the enlarged portions 11 contracting sufliciently to allow the rings to readily pass over said enlarged portions.

The surface of the walls 7 between the enlarged portions 10 and 11 are slightly concave and it will be readily seen that when objects are introduced into the sockets and the rings forced downwardly, said rings will cause the sections of the walls 7 to bind upon the article introduced into the socket.

When the dividers are being employed for marking upon a black-board, a stick of chalk is introduced into one of the sockets, while a bearing point is introduced into the opposite socket and, in order to prevent the point from mutilating the board, said point is preferably constructed from wood or extremely soft metal, the point being employed when circles are to be made. If, however, the dividers are to be used for making two straight parallel lines, the bearing point is dispensed with and a stick of chalk secured in each socket.

The lower ends of the arms 1 and 2 are to be separated various distances apart and to hold said arms in their adjusted positions, the arm 1 has secured thereto a graduated plate 12, the free end of which extends through a slot 13 in the arm 2 and, when the arm 1 is used as a pivot, the arm 2 is swung away from the arm 1 the proper distance, when said arm may be secured in its adjusted position by means of a binding bolt 14 extending through a threaded socket 15 in the arm 2 and engaging one face of the graduated plate 12.

The arms 1 and 2 are preferably constructed from wood, thereby enabling me to produce a very light form of dividers and much larger than would be practicable if constructed of metal and, in view of the use to which the dividers are to be put, said dividers will be thoroughly efiicient and readily applied to use.

It will further be seen that various articles may be readily introduced into the sockets of the dividers and secured therein by means of the rings surrounding the walls of the sockets.

What I claim is:

The herein described dividers, comprising a pair of arms hingedly secured together at one end, the opposite ends of the arms having sockets formed therein, the walls of the sockets being slit, said arms being enlarged at their free ends and "at points adjacent the inner ends of the sockets, the walls of the arms between the enlargements being concaved and rings loosely held by the arms b6-j tween the enlargements, said rings being of less diameter than the diameter of the inner enlargements, but of less diameter than the enlargements on the free ends of the arms, when said enlargements are depressed to close the slits.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ANDREW J. HIBBETT.

Witnesses:

E. E. HENRY, W. HARRIS

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