US2095116A - Drafting instrument - Google Patents

Description

Oct. 5, 1937. J, w, A LBm 2,095,116

DRAFTING INSTRUMENT Filed Dec." 8, 1936 2 Sheets-Sheet 1 INVENTOR.

' JEREM/m/ W 1 71. 5/

BY 27 (e .z/ZZL ATTORNEYS 1937- J. w. ALBIN 2,095,116

DRAFTING INSTRUMENT Filed Dec. 8, 1936 2 Sheets-Sheet 2 ATTORNEY Patented Oct. 5, 1937 UNITED STATES DRAFTING INSTRUMENT Jeremiah W. Albin, Babylon, N. Y., assignor of twenty-five per cent to William M. Muncy,

Providence, It. I.

Application December 8, 1936, Serial No. 114,743

3 Claims.

The present invention relates to a marking or drawing instrument and particularly relates to an instrument for marking or drawing geometrical figures upon paper, wood, glass, and so forth.

It is among the objects of the present invention to provide an inexpensive, readily manipulated drawing instrument designed for drawing various geometrical figures, such as ellipses, polygons or other regularly or irregularly shaped objects, and so forth on paper or other surfaces and also designed to mark or cut glass with such figures.

Another object is to provide a drawing instrument of the character above described which may be readily operated to place a large variety of figures upon a desired surface by relatively simple manipulations and without difliculty in adjust ment.

Other objects will appear or will be obvious during the course of the following specifications.

In accomplishing the above objects, it has been found most convenient to provide a standard, preferably including three legs, two of these legs may carry a plurality of transverse structures, one structure supporting a marking or writing instrument and the other structure guiding said instrument, the guiding structure preferably being positioned below the supporting structure.

One of the three legs may be detachable and the guiding structure may be so assembled on the legs that its height in respect to the table or support may be varied.

In one form of construction, the stylus, pencil, pen or other marking device is provided with a resilient connection to the upper supporting structure which enables the device to be drawn downwardly to make contact at'its lower point with the object to be marked.

The guiding structure is preferably provided with a recess or holder in which may be positioned plates having differently shaped apertures, these apertures-"for example, taking the form of ellipses, triangles, and so forth. 7

The above and other objects will appear more clearly from the following detailed description when taken in connection with the accompanying drawings and will illustrate a preferred embodiment of the inventive idea.

In the drawings:

Figure 1 is a front elevation of one form of apparatus according to the present invention.

Figure 2 is a side sectional View upon the line 2-2 of Figure l;

Figure 3 is a transverse sectional view upon the line 3--3 of Figure l;

55 Figure 4 is a transverse sectional view upon 7 tion by the set screw l3 having an enlarged head the line 44 of Figure 2 with the supporting'leg partly broken away.

Figure 5 illustrates upon an enlarged scale, in side view and partly in section, an inking or ruling pen which may be utilized in lieu of the pencil in the combination of Figs. 1, 2 and 3.

Figure 6 is a transverse sectional view upon theline 6-6 of Figure 5 upon an enlarged scale.

Figure '7 is a plan view upon an enlarged scale of an alternative outline arrangement designed to be used in place of the arrangement shown in Figure 3;

Figure 8 is a plan view of a further alternative guiding outline designed to be utilized in lieu of the arrangement shown in Figure 3 also upon an enlarged scale. 7

Figure 9 is a front elevational view of an a1, ternative construction designed for marking glass.

Figure 10is a fragmentary side view, partly I in section and upon an enlarged scale, of the lower end of the marking device of Figure 9, and

Figure 11 is a side view partly in section and upon an enlarged scale of an alternative marking device designed to carry a supply of marking fluid.

Figure 12 is a side view of a marking devic attachment for use with leads or crayons.

Referring to Figures 1 to 4, the device is provided with a standard A having vertical legs B and a supporting leg 0. The legs B are joined at their upper ends by the cross bar D. The marking device E is suspended from the bar D and passes through theguide frame F.

The legs B are pointed at their lower ends 10, where they rest on the table II. Upon the legs B are receivedthesleeves l2 whichslide upon the legs and are fixed in any desired posi- Theupper ends of the legs are of redu'ceddiameter as indicated at l5 and a cross member D is provided with openings to fit upon said reduced diameter portions l5 and rest upon the shoulders ll. The nuts l8 are designed to clamp the cross member D in position upon the top of the legs B. I V 7 The sleeves l2 at their lower ends are rigidly fitted onto the cross member F which is of skeleton construction, as best shown in Fig.3,

The cross member F has side arms-l9 support the square'fr'a'me portion 20. The'square frame 20, as best shownin Fig, 2,-is shouldered at 2,1 to receive the guide plate 22 j than; I

The back of the frame 20 is provided with an opening 23 which receives the projecting end 24 of the spring holder or clip 25. The opposite side of the frame 20 is also provided with an' fthat other plates, such as the plate 22a of Fig. 7 with an hexagonal, opening 300 or the plate 22b of Fig. 8 with the'triangular opening 301) may be employed. The set screw l4 when loosened permits the structure F'to be elevated or depressed upon the legs B.

The higher the cross member F the larger. the

design will be. 7 The exact height of the cross section F maybe determined by a graduated scale 3! (see Fig. 1) positioned on one of the legs B as shown in Fig. 1.

'I'he crossmernber Dis provided with a conical V recess 32; through which projects the upper portion 42 ofi the marking device E. The marking device E is headed with the screw 34. The coil spring 3 5, encircling the device E reacts against the h ead 34 at its upper end and against the washeri36'at its lower end.

The device E is also provided with a'stop' e'n-.

largement 31 which prevents it from being lifted out of the recess 32. I

- 2 Fig, l hasa pencil point 4!.

1 the upper shank 42 of the marking device E The lower end 31 of the marking device E is interchangeable. This is accomplished by the tapped socket 3 8 which received a threaded projection '39-fr0m the lower 'end portion of the marking'device E. The device E -,;as shown in The lower end of abuts the lower portion 40 at 43-as; shown in Fig.2.

To enable a firmer-support of the structure A upon; attablebl I, an additional leg C is provided as best shown in Fig. 2. The lower end of the leg C is pointed as indicated at to contact the table. The upper end of the leg C isflattened and bevelled as indicated at 45 in Fig. 4. This flattened and bevelled portion 45 fits into the recess 46 in the crossemember D. e i

. In operation the marking device E may be grasped bythe fingers M as indicated in Fig. l

and moved downwardly from the position of Fig. 2 until the pencil point touches the paper or other sheet to be" marked upon the table II.

The device E then maybe moved; around contacting the, edgeiof the opening 39 asindicated at PP in Figsrl and 2 with the result that an ellipse will be iormed,the size of which may be regiilated by' the position of the guide structure F in respect to the'scale 3|. a

-As soon, as the marking device is released it will be moved back into the. original position of Fig. 2 by the spring 35.

. The conical opening 32 in the cross member D permits free movement of the device E; The plates 22 may be changed by bringingtogether the finger grip portions 21, removing the locking -wire 25 andthen lifting the plate 22 outofposition. Other plates; 22 with other shaped openings 39 may then be substituted and the locking wire 25 be replaced. a Y

To. remove the guide structure fit is necessary/to remove the lock nut 41 which fits-upon the threaded lo wer endf48, or one or the legs B.

'gether by the screw96'.

rials. 7 b

Although the cross bar D and legs B are shown loosened and the marking device E may be removed. However, it is usually sufficient to break the connection 3839 and replace the pencil 40 as shown in Figs. 5 and 6 with some other marking device; e

As indicated in Figs. 5' and 6, the threaded shank 39 of the pen 40' may be threaded into the tapped recess 38 of the marking device-E. The pen 40' is provided with nibs 50 which may be adjusted byset screw 5|. To enable flow of ink when the pen is turned completely around, the sides of'the pen are beveled as indicated at The bottom of the legs B are provided with. adjustable rests I!) having screws"54 permitting The leg structure B and adjustment thereof. guide structure F are made. more rugged'than in Figure l. v dicated at 55. Instead of a pencil or apen, the

' cutting wheel 55 is employed which wheel, is

axially mounted at the bottom of the tapered portion 51 of-the. structure 40 on the axis 93 (see Figure 10). V

In Figure 11 is shown an alternative marking point. The structure) carries at its lower end a swinging structure 58 pivotally mounted by the This will permit ink to flow from the pen- The glass panel to be marked i m rod 59. The structure 58 is provided with a well 60, receiving the ink or other marking fluid from which ink is fed to a wheel 6| pivotally mounted on 62 below the cup 69. The ink may readily e flow from the cup 60 to the wheel GI. and thence to'the surface to be marked.

threaded shank 9| designed to be'screwed into the tapped hole 38 in the'upper portion 4210f the marking device E.

The gripping device 92 is split at 93 to form the jaws 9,4, 95 which jaws may be drawn-to The screw 96 has ashank 91 which extends through the jaw 94 into the jaw 95. e

The adjacent faces of the jaws 95, 96 are pro vided with grooves '98, 99 in which the lead J may be placed and gripped by tightening the screw 96. e e

The grooves 98'and 99 are contained through V the shank 91' of the device by the bore lfll',

The enlarged bere'ioz increases the fiexibility of the jaws 94 and so that they may be more readily. pressed together by thescrew 96 .to grip the lead I00. 7

Instead ofa {lead 190 ;it isalso possible to use cylinders or crayonsor other marking 'mate- With the nut 41 removed and thegset screw [-3 *as being made of separateparts in Figure '1 it is apparent that they could be made of one piece of metal stock as for example, by casting.

Moreover, the swinging construction of Figure 11 might also be applied to the pen of Figure so that the space I03 between the nibs 50 of Figure 6 would always be parallel to the direction of movement.

The height of the sleeves l2 are such that the cross bar F cannot come closer to the cross bar D than indicated by the dot and dash line H0 of Figure 1.

By so proportioning the sleeve l2 assurance is had that even at the uppermost position of the cross bar F, the movement of the marking device E will be so restricted that it cannot be extended beyond the legs In.

The angle of the bevel 32 in the cross structure D at the top of the device, as shown in Figures 1 and 2 is sufficient so that it will fully accommodate the extreme sidewise movements of the marking device E at the uppermost position of the cross member F, Without jamming.

It is apparent that the specific illustrations shown above have been given by way of illustration and not by way of limitation and that the structures above described are subject to wide variation and modification without departing from the scope or intent of the invention, all of which variations and modifications are to be included within the scope of the present invention.

What is claimed is:

1. A marking instrument comprising a stand comprising a plurality of legs, a supporting member carried by said legs and a guiding member carried by said legs, and a marking member suspended from said supporting member and guided by said guiding member, said guiding member including a frame, an apertured guiding plate positioned in said frame and a. spring clip to hold said apertured plate in position.

ture having an enlarged-head, a coil spring encircling th upper end of said device and reacting between said cross bar and said enlarged head, a cross frame, the ends of which are provided with sleeves, encircling and sliding on said first mentioned legs, a set screw to fix the position of said cross frame on said first mentioned legs, a central holder in said cross frame positioned directly below said central aperture and said cross bar, said holder being shouldered so as to receive an aperture plate, said plate being apertured to form a geometrical figure and a spring clip holding said plate removably in position.

3. A marking instrument comprising a stand comprising a plurality of legs, a supporting member carried by said legs and a movable guiding member carried by said legs, and a movable marking member suspended from said supporting member and guided by said guiding member, said guiding member being provided with spacer sleeves also carried by said legs to limit movement thereof toward said supporting member so as to prevent jamming of the marking member or movement of the marking member beyond said legs.

JEREMIAH W. ALBIN.

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