US1498994A - Clip for drawing instruments - Google Patents

Description

June 24 {1924. I 1,498,994

- l. BORSUK ET AL CLIP FOR DRAWING INSTRUMENTS Filed April 11. 1921 Patented June 24, 1924.

UNITED STATES 1,498,994 PATENT OFFICE.

IRWIN BORSUK, OF NEW YORK, AND ERIK V. MEYER, OF NEW ROCHELLE, NEW YORK.

CLIP FOR DRAWING INSTRUMENTS.

Application filed April 11, 1921.

,To (1111072 0mit may concern Be it known that we, IRWIN BoRsUK. a citizen of the United States, and a resident of the city of New York, county of Kings, and State of New York, and ERIK V. MEYFR, a subject of the King of Denmark,

- and a resident of New Rochelle, county of ing instrument such as a T square, triangle,

straight-edge or curve is inadvertently moved across an'inked line which has not thoroughly dried, so that ink is smeared over the drawing. The instruments mentioned have the tendency also, when moved about, to transfer any dirt or dust on the under face thereof, to the drawing.

It is one of the objects of this invention to provide cheap and efficient means for minimizing the danger of smearing wet inked lines while other lines of a drawing are being inked in, and for largely eliminating the danger of dirtying the surface of the drawing.

A further object of this invention is the provision of means for spacing the under surface of a drawing instrument from the drawing surface without detracting from the eflicacy of said instrument.

A still further object of this invention is the provision of means extending from the under surface of a flat drawing instrument and designed to have a minimum area for contact with the drawing surface, whereby the greater part of the instrument is kept clear of the drawing surface, and the entire instrument is readily moved about and easily handled.

The invention accordingly consists of the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter described and of which the scope of iilivention will be indicated in the following o aim.

Serial No. 460,391.

In the accompanying drawings in which is shown an illustrative embodiment of our invention,

Fig. 1 is a front view of our invention. ,2 is a bottom plan view of the same. Fig. 3 is a front view of our device as it appears when attached to a flatdrawing instrument.

To raise the usual flat drawing tool such as a T square, triangle, straight-edge, curve or the like, above the drawing surface, as is preferably done in a tool of our im roved type, we provide the spring clip 15, aving the lower portion 16 and the upper portion 17 cooperating therewith, the extremity 20 of said portion 17 being preferably upturned to allow the ready msertion of a tool intosaid clip. Bosses as 18, are formed in the portion 16 and serve to maintain the under surface of said clip above the drawing surface. Said clip 15 is adapted to be slipped over a tool, the number of such clips used depending on the size of the tool to which they are attached, a sufiicient number being used to maintain the tool fiat and to prevent undue bending thereof between the supporting bosses.

It will be seen that the bosses and knobs 18 when in use, contact with the drawing surface 19 along a comparatively small area, whereby, while the efliciency of the tool is not lessened, the said tool is easily moved about without the danger of streaking inked lines or of transferring dirt from the tool to the drawing, and lines may be inked over and across other wet inked lines.

It will also be seen that there is provided means by which the several objects of this invention are achieved andiwhich are well adapted to meet the conditions of practical use.

We claim:

In combination with a drawing instrument, having a fiat under surface, a detachable spring clip of a single strip of sheet metal of the same width throughout comprising a flat rectangular lower member of the same width throughout, a substantially spherical boss of less diameter than the width of said lower member, adapted to contact with a drawing surface over a negligible area, and pressed outwardly from and integral with said lower member, an upper rectangular spring member of the same width throughout as said lower member, an

upturned extremity on said spring member, a downwardly convex portion between said extremity and the remainder of said upper member, and an upright portion bent substantially at right angles to said upper and lower members, adapted to allow said instrument to be readily inserted between said upper and lower members for slightly spreading said members. of the same width throughout as said upper and lower mem- 10 here and of substantially the same length as the thickness of said drawing instrument. Signed at New York, in the county and $33? of New York, this 9th day of April,

IRWIN BORSUK. ERIK v. MEYER.

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