US147766A

US147766A - Improvement in dividers

Info

Publication number: US147766A
Authority: US
Publication date: 1874-02-24
Anticipated expiration: 1891-02-24

Description

nTES

A.'rnN'r OFFICE.

DANIEL GOODNOIV, JR., .OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN DIVIDERS.

Specification forming part of Letters Patent No. 147,766, dated February 24, 1874; application filed october 20, 1873.

To all whom it may concern:

Be it known that I, DANIEL GooDNow, Jr., of Boston, Suffolk county, Massachusetts, have invented certain .Improvements in Dividers, of which the following is a specification:

The purpose of this invention is to provide a means for enabling any person to provide a practical and effective pair of dividers at a moments notice; and consists in the combination of two soclteted or tubular holders, united by a suitable joint, which enables them to diverge from one ano ther, each holder being designed to receive and sustain a lead-pencil, or other equivalent object, which constitutes one leg of the dividers..

The drawings accompanying this specication represent, in Figure l, an elevation, in Fig. 2, a horizontal section, and in Fig. 3, a vertical section, of a pair of dividers as obtained by my method.

In these drawings, A A represent two tubular or socketed holders, which are formed of sheet metal bent into a circular form over a mandrel, and preferably composed of spring sheet metal, in order that their inherent elasticity shall be suflicien'tly powerful to retain a firm hold upon a pencil or other object inserted within them. Each tube or holder is formed with an ear, a, which cars are lapped together in a suitable manner, and coniined one to the other by a rivet, b, the joint in the present instance being a rule'hinge practically.i

B y means of these jointed holders, an effective pair of dividers may be provided by ini serting an ordinary lead-pencil into each, the points of the pencils serving as the termination of the legs which the pencils produce.

In many cases, the lead of a pencil, when reduced to a point, would answer all purposes as a pivot about which to describe a circle with the other pencil; but, in many cases, a metallic point may be desired; and, to meet this want, I provide a tubular foot, c, as shown in Fig. 4c of the drawings, which terminates in a sharp point or spur, as shown at d. This metallic foot may be slipped upon one or both the pencils, and provides an indestructible point to each leg of the dividers. In lieu of lead-pencils, pen-holders or other sticks may be cmployed to advantage; and a mechanic, or any person in posession of the jointed holders, has the means at hand of obtaining a pair of dividers by providing two sticks to enter such holders.

I claim- The combination ot' the socketed or tubular holders A A to receive leadpencils, or their equivalents, these holders being pivoted together, and the whole operating substantially as explained.

DANIEL GOODNO lV, JR.

NfTitnesses F. CURTIS, W. E. BOARDMAN.