US3089246A - Compasses - Google Patents

Description

May 14, 1963 H. RIEPE 3,089,246

COMPASSES Filed Dec. 12, 1960 2 Sheets-Sheet 1 I N V EN TOR 1622/70/79 P/EPE H. RIEPE COMPASSES May 14, 1963 2 Sheets-Sheet 2 Filed Dec. 12, 1960 FIG. 3

(llllllllllllln /6 United States Patent 3,089,246 COMPASSES Helmuth Riepe, Hamburg, Germany, assign'or to L. & C. Hardtmuth, Inc., Bloomsbury, N.J., a corporation of New Jersey Filed Dec. 12, 1960, Ser. No. 75,369 1 Claim. (Cl. 33-27) This invention broadly relates to compasses, and particularly to such devices adapted to removably receive fluid-holding writing implements.

One of the objects of this invention is a compass structure having provision of exchangeably holding a fluid-dispensing writing implement, such as an implement containing India ink, and which implement is intended to draw lines of uniform thickness or width, while held in and while being operated by the movement of the compass structure.

Another object of the present invention is a compass structure of the type stated, and which structure is adapted to provide the widest possible adjustment for drawing circles of varying radii and of uniform line thickness.

The foregoing and other objects and additional advantages of the present invention will be more fully understood from the ensuing description of the accompanying drawings, the latter serving for explanatory purposes only and are not intended to in any extent limit this invention, and in which drawings:

FIG. 1 is a side elevation of a bow compass provided with a removably mounted fluid-dispensing writing implement;

FIG. 2 is a partial end view of FIG. 1 as seen in the direction of arrow II;

FIG. 3 is a partial side elevation of a modified structure of the left-hand arm of the compass for accommodating a fluid-dispensing writing implement;

FIG. 4 is a partial end view of FIG. 3, partly in section, as seen in the direction of arrow IV;

FIG. 5 is an end view, partly in section, of a modified structure similar to that shown in FIG. 4; and

FIG. 6 illustrates adjustable extension means provided with the structure seen in FIG. 5.

In all of the structural examples illustrated, leg 1 of the compass, which leg may be termed the mobile leg, has its lower portion formed into a two-pronged fork 2. Between the ends of the two fork prongs there is rotatably lodged a receptacle body 3 having a central, internally threaded aperture or eye for removably holding a writing implement. Body 3 is substantially square or otherwise parallelogrammatic in shape and is adjustable within the fork 2, and can be held in any adjusted position by knurled clamping nut 4.

As seen in FIG. 2 the internal thread 5 in the receptacle body 3 removably receives the threaded portion 5 of head 6 of a fluid-dispensing writing implement W. From the threaded lower end 5 of head 6 extends nib 7 holding a fluid-dispensing tube 8. The fluid, such as India ink, passes through nib 7 and tube 8 against the drawing surface S. The writing fluid is preferably held in an exchangeable cartridge 9.

As illustrated in FIG. 2, the spacing and the length of the prongs of fork 2 are such as to permit writing implement W, including its cartridge 9, to assume any desired position within the fork, for instance a position coaxial with the prongs of the fork, or perpendicular to writing surface S.

The illustrations in FIGS. 1 and 2 denote a bow compass as the simplest example of a compass structure, which latter is intended to serve for explanatory purposes only, it being obvious that the present invention is readily applicable to any other desired compass structure.

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As is evident from the drawings, writing implement W can be caused to assume a position perpendicular to writing surface S, irrespective of the spread or the relative position of the two compass legs, so that tube 8, or for that matter any other Writing or drawing element either dry or fluid-dispensing, or a marker, employed in a bifurcated compass arm, similar to that of mobile arm 1, can be always positioned for drawing, tracing or marking purposes for scribing circles, at right angles to the surface to be used, such positioning being effected, and the implement held in the required position by means of receptacle body 3 and the knurled nut 4, which latter fixates the position of the body 3.

Attention is invited to the ready exchangeability of writing implements in receptacle 3, the interior opening of which is threaded, as at 5 (see FIG. 2 That internal threading facilitates a quick exchange of writing implements W, if, for instance, a change in the width of lines defined by tubing 8 is desired, or if a change in color of the dispensed fluid is to be effected. Such exchange is made readily by simply unscrewing one writing implemerit and replacing it by the desired, similarly constructed other writing implement fitting into the receptacle body 3.

As will be observed by consulting FIGS. 3 and 4, these illustrations are intended to show that the normal spread of the compass legs can be substantially increased by 10- cating the pivotal axis for receptacle body 3 as close as possible to the writing surface S. That is effected by providing body 3 with a pair of spaced depending, substantially parallel extensions 10, and pivotally mounting their lowermost ends by means of pins 11 and 11 at the ends of fork 2. The pin 11' is threaded at its outer end and is engaged by knurled clamping nut 4. Pins 11 and 11 pass through suitable hearings or apertures provided at the lower ends of the two prongs of fork 2.

In FIGS. 5 and 6 is illustrated a structure for increasing the span of the compass without diminishing the possibility of adjusting the writing implement to be used at a vertical position in respect to the writing surface, and without curtailing the ready exchangeability of desired writing implements.

It will be seen from FIG. 5, that there is again employed a bifurcated compass leg 2, and that between the two prongs of the leg is pivotally and adjustably held internally threaded body 3, similar to that shown in FIGS. 1 and 2. Into the threaded eye or aperture within body 3, there is inserted the smooth, cylindrical end 12 of flanged element 13, its flange 14 engaging the lower face of body 3. Extending from smooth, cylindrical end 12, which latter obviously only touches the interior diameter of the thread in body 3, there projects a threaded pin 15 adapted to be engaged by clamping nut 16. The latter is adapted to bear against washer 17 which engages the upper surface of body 3, as seen in FIG. 5.

Extending from flange 14 of element 13 is an extension tube 18 directed into a sleeve 19 provided with a clamping screw 20, by means of which extension tube 18 can be held in adjusted position relative to sleeve 19. At the exterior end of tube 19 is provided an internally threaded body 21, its thread being adapted to receive an exchangeable writing implement W. Obviously extension tube 18 and sleeve 19 are directed outwardly and in lefthand direction in respect to bifurcated arm 2 seen in FIGS. 1 and 3.

By means of the aforedescribed extension arrangement a much greater span in the use of the compass so equipped is achieved, without the loss of the required positioning of the writing implement at right angles to the writing surface.

From the foregoing description of the drawings, which latter serve for explanatory purposes only, it becomes aoaaaaa evident that particular stress is laid upon some of the features of the present invention, such as the ready exchangeability of Writing implements in conjunction wtih compasses; the provision of ready positioning and fixedly holding in adjusted position of a writing implement in a compass, for instance, at right angles to the writing surface; the location of the pivotal and adjusting means for the Writing implement at as short a distance from the writing surface as practicable, thus positioning the Writing element (tube 3) .of the writing implement W as close to the writing surface as possible, which low placement of the adjusting means enhances the spanning distance of the compass legs; and the adjustable extension means for at least one of the compass legs for substantially increasing the span between the two compass legs, without curtailing the possibility of ready adjustment and exchange of writing implements.

Having thus explained the salient features of the present invention, it is to be understood that the specific description of the accompanying drawings is intended to more graphically explain the present disclosure, and that neither the description nor the drawings are to be considered at limiting the latter in any sense whatsoever.

What is claimed as new is:

A compass structure having what may be termed fixed and mobile legs, the mobile leg having its lower portion formed to provide a two-pronged, substantially Widely spaced fork, a hingedly mounted internally threaded receptacle bodyfor removably accommodating an exchangeable writing implement operatively mounted within and at the ends of said fork and at closest possible proximity to the writing surface to become engaged by the writing implement, a pair of spaced substantially parallel extensions depending from the internally threaded portions of the receptacle body, the lowermost ends of said extensions being pivotally mounted at the lowermost ends of said fork, that is at the closet proximity to the writing surface, thus providing adjustability of said receptacle body Within said fork, rneans for holding said body in adjusted position, an externally threaded Writing implement, having a writing element, removably associated with said receptacle body so that the end of said writing element is located in its operative position upon a writing surface substantially below the pivotal connection between the lowermost ends or said body extensions and the lowermost ends of said fork.

References Cited in the file of this patent UNITED STATES PATENTS

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