US2010198A - Drafting appliance - Google Patents

Description

mg. 6, was H. W. RICE @W DRAFTING APPLIANCE Filed 'Deo. ll, 1953 f lmdmllm.llll lmllma' Ill f1 Home y Patented Aug. 6, 1935 V UNITED STATES PATENT OFFICE DRAFTIING APPLIANCE Henry W. Rice, East Boothbay, Maine Application December 11, 1933, Serial No. 701,908

7 1 Claim. (01. 33-104) This invention relates to an appliance or acbe clasped or held in the snap rings of a loose leaf cessory characterized by two or more drawing inbinder or notebook such as is used by school chilstruments and a carrier or holder therefor, the dren and students. The opposite longitudinal entire device being especially, but not necessariedge I2 is preferably formed with graduations l3 5 1y, adapted for use by school children and being so that it may be used as a straight-edgeand 5 expressly designed to be conveniently fastened in ruler. One end I4 is shaped to provide the curve a loose leaf binder, notebook or the like. of a predetermined shape to function as a pencil Briefly stated, the inventive conception comguiding edge. The opposite end portion 15 is also prehends an assembly of parts, the main part of of suitable configuration so. that it may be used which serves as a pattern or guide to aid in drawas an aid and guide in the drawing of predeter- 10 ing and measuring, and has the additional funcmined lines.

tion of a holder or carrier for detachable acces- As before stated, this main pattern or part 9 sories, for example, a triangle, and an irregular is formed within itself with supplemental instrucurve or the like. ments or parts, one of which is distinguished by When constructed in accordance with the printhe numeral l6 and the other one by the numeral 15 ciples of the present invention the structure, as IT. The detail It may be described as a triangle a unit, is stamped out from sheet material of apand the detail I? as an irregular curve. These propriate texture to form the main pattern and parts l6 and Il' are struck out from the body of said main pattern is in turn stamped out to prothe main part or pattern 9. It is to be pointed vide, within itself, additional instruments for out that the material possesses inherent resil- 20 selective use, the idea being to provide a simple, iency and when the parts l6 and I! are struck economical and useful appliance serving as a out they do not readily snap back into place guide to facilitate the drawing of geometrical figwhen replace-d. To compensate for this it will ures, astronomical designs and the like. be observed that substantially circular holes I8 Other features and advantages will become and i9 are formed at the apex ends of the open- 25 more readily apparent from the following deings from which the parts l5 and I! are struck scription and drawing. out and this provides for requisite expansion and In the drawing: contraction to facilitate application and removal Figure 1 is a top plan view of a device conof said parts 16 and I1. structed in accordance with the principles of the Referring to the part 11, it will be observed 30 present inventive conception. that it is provided with a plurality of apertures Figure 2 is an edge elevational view thereof. of appropriate shape and dimension to function Figure 3 is an enlarged detail section taken as guides and to aid in the drawing of certain deapproximately on the plane of the line 33 of signs and figures. For example the numeral 20 Figure l. designates a diamond cut out, 2| a star, and 22 5 Figure 4 is a view like Figure 3 showing the rea crescent. It is understood, of course, that these taining button moved to releasing position. openings may be of any predetermined forma- Figure 5 is a detail view of the retaining buttion, this being an incidental feature of the inton per se. vention. V Figure 6 is a fragmentary view of an edge As a safety measure, where the material is 40 portion of the main pattern or holder. lacking in resilient property, and where the parts By way of introduction it is to be stated that It and IT would become easily displaced from the invention may be constructed of any approtheir receptive openings I have found it advanpriate texture or character of sheet material. tageous to provide slidable retaining buttons.

For example it can be inexpensively made from These buttons are all of the same kind and they 45 cardboard, from hard rubber, aluminum or the are distinguished by the numerals 23 wherever like but it is preferably made from some subthey occur. The buttons are of suitable material stantially translucent composition such as is used and as shown in Figure 5 each button comprises in the construction of regulation patterns and a shank 24 formed with disk like heads 25 which guides used by draftsmen. have frictional sliding contact with the upper and 50 The main pattern, which is in itself a guide is lower surfaces of the parts with which they codenoted in Figure 1 by the numeral 9. It is of genoperate. These buttons are slidably mounted in eral rectangular form and along the longitudinal special apertures provided therefor as shown in edge I0 slots II are formed, the slots being apthe drawing. It might be mentioned, however,

propriately spaced so as to permit this part to that the openings 18 and I9 which serve as ex- 55 pansion means may also serve to accommodate these buttons 23. At other points where the buttons are used, that is around the marginal portions of the opening from which the parts l6 and I! are struck, the apertures are of keyhole shaped form and denoted by the numerals 26, shown for example in Figure 6. When the buttons are released they are slid out into the enlarged portions of the slots 26 and when adjusted to retaining position are adjusted into the restricted or neck portions of the slots. When in the latter portions of the slots the disk like heads 25 overlap adjacent portions of the parts i6 and I? with which they cooperate as shown in Figure 1. Some idea of the manner of ad-- justing the button from retaining to release position is illustrated in Figures 3 and 4.

The principal novelty is predicated upon a body of sheet material of appropriate nature characterized by a main pattern from which supplemental patterns are struck out, whereby to provide a plurality of individual instruments susceptible of selective use. The idea of constructing the part Si to serve as a carrier and holder for the parts i6 and il is unique. Secondly, the idea of providing this part 8 with slots ii so that it may be fastened in snap rings or the like in a loose leaf binder is advantageous in a school appliance of this kind. In the most simple and economical type of the device recommended for the trade the adjustable button fastener 23 may be omitted, since the parts i6 and ill are more or less self retaining when the material from which said parts are made is of suitable resilient nature. When however, the buttons are used it is obvious that the shank portions of the button are slidably mounted in slots arranged around the marginal portions of the opening from which the parts 16 and H are pushed out when desired for use.

A careful consideration of the foregoing description in conjunction with the illustrative drawing will enable the reader to obtain a clear understanding of the purpose, features and advantages, the explicit construction, and the invention as hereinafter claimed.

It is to be understood that minor changes in shape, size, relative proportions, and materials may be resorted to in practice without departing from the spirit of the invention or the scope of the invention as claimed.

Having thus described my invention, what I claim as new is:

An appliance of the class described comprising a body, said body being constructed of sheet material, an individual drawing instrument struck out from said material, said instrument fitting rcmovably in the opening from which it is struck when not in use, and there being slots formed around the edge portions of said last named opening, and a group of slidable fasteners, each in-- cluding a pair of buttons on the ends of a shank, the shanks being slidable in the slots, and the buttons cooperating with the edge portion of said instrument to aid in holding the instrument in place when not in use.

HENRY W. RICE.

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