US157584A - Improvement in drawing-pens - Google Patents

Description

E. DA-GUIN. P

7' Drawing-Pens. No.l57,58,4,. PatentedDec.8,l874.

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UNITED STATES PATENT OFFICE,

EUGENE DAGUIN, OF PARIS, FRANCE.

IMPROVEMENT IN DRAWING-PENS- Specification forming part of Letters Patent N0. 157,584, dated December 8, 1874; application filed January 9, 1873.

To all whom it may concern:

Be it known that I, EUGENE DAGUIN, of Paris, in France, have invented Improvements in Drawing-Pens, of which the following is a specification: V

The object of these improvements is to enable fine, thick, or tapered lines to be executed by the drawing-pen at one stroke, Without recourse to the setting-screws usually employed for varying the opening of the nibs.

Figure l of the accompanying drawing is a front View of. a compass-pen constructed according to this invention. Fig. 2 is acrosssection of the same through line A B, Fig. 1. Fig. 3 isa front View of a pen for tracing straight lines.

at b are flattened portions of the branches a b, twisted in opposite directions to each other,

.and inclined at an angle of from thirty to forty-five degrees to the plane passing by the axis of the pressure-screw, as indicated in Fig. 2. These flattened parts are sufficiently thin to bend or spring under slight pressure, thus causing the tracing-points to open more or less, like the slit nib of the common writing-pen, and to close again according as the pressure is removed. d is a screw, for adjusting the separation of the branches to the maximum thickness of the lines to be traced, which, when required, may be tapered 01f to the finest point by varying the pressure of the hand. 0 is the screw by which the points are set to the minimum thickness of line to be traced.

, For the execution of thick straight lines, the branch I) is fitted with a rigid bar, f, Fig. 3, which, acting as guide against the rule g, allows the point of the pen to open freely to the required extent.

The pen above described may be converted into an ordinary drawing-pen by removing the screw 0 and using the screw 01 for the adjustment of the points.

What I claim, and desire to protect by Letters Patent, is

An improved drawing-pen, constructed with a thin blade or spring, a 11, substantially as and for the purpose herein set forth and shown.

E. DAGUIN.

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