US1575209A - Drawing instrument - Google Patents

Description

March 2 1926. 4

, A. T. JESPERSEN DRAWING INSTRUMENT Filed June 4, 1924 IN V EN TOR A. uga en,

WITNESSES A TTORNE YS etc.

Patented Mar. 2, 1926.

ASKET| THEODOR JESPERSEN, OF OMAHA, NEBRASKA DRAWING INSTRUMENT.

Application filed June 4,

To all whom it may concern:

I Be it known that I, AKsEL THEODOR J ES- PERSEN, a citizen of the United States, and resident of Omaha, in they county of Douglas and State of Nebraska, have invented certain new and useful Improvements in Drawing Instruments, of which the following is a specification. I

This invention relates to improvements in -drawing instruments and it consists of the constructions, combinations and arrangements herein described and claimed.

An object of the invention is to provide an instrument for making. dots either in relatively broad bands or otherwise, depending on the sizeof dot roller employed, the instrument being adaptable for use by draft'smen, engineers, lithographers, artists and others having use for an instrument of this particular type. I

Other objects and advantages appear in the following specification, reference being had to the accompanying drawing, in which Figure 1 1s a side elevatlon of theimsf proved drawing instrument.-

Figure 2 is a plan view thereof.

Figure 3 is an inverted plan view.

Figure 4 is a side elevation ofthe head of the instrument, shown on a larger scale than Figure 1.

Figure 5 is a front elevation.

In carrying out the invention, the improved instrument is made to include a handle 1 and a head'generally designated 2. The handle 1 is enlarged at 3 (Figs. 2 and 3) to provide a support for the spaced side plates 4. These side plates are permanently secured to the enlargement 3 by suitable means 5 which may consist of riv ets, screws,

The side plates 4 are connected by a bridge 6 (Figs. '2, 4 and 5) which connect the free ends and holdthem in proper spaced relationship, Stamped ears 7 provide means by which springs 8 are held in place on the respective sides of the headi2. The ears 7 are clamped down upon the springs so as to fix them in position uponthe side plates 4.

Each side plate has slots 9 and 10. These are arranged in transverse alignment in order to provide true hearings or supports for the shafts 11 and 12 of the dot and inking rollers 13 and 14 respectively. The springs 8 are of substantial inverted U-shape, one leg of each, however, having a forwardly extendingarm 15 for thepurpose of sup- 1924. Serial No. 717,778.

porting the shaft 11 in its bearings 9. The

other leg 16 of each spring is substantially straight, and exerts a forward pressure on the shaft 12 of the inking roller so as to keep said shaft in place in its bearings 10.

The ends of the springs are bent slightly downward to provide a more convenient place to apply linger pressure when removing either the dot or inking roller 13 and 14. lnk is supplied to the roller 13 by the holder 17. This holder terminates in a curved por tion 18 at the lower end which may be regarded as a cup. The cup holds either ink or other substance suitable for the purpose, the object of the cup being to supply the roller 14 which, in bearing against the studs 19 of the dot wheel 13, distributes the ink in an even and thin layer.

Portions 20 of the holder 17 arecut down and bent from the lip 21 in order to provide a hinge mounting for the holder. These portions are bent around a screw or rivet 22 in the hinge support. The rivet 22 spans the distance between the sides 4. The side plates are provided with a pair of lugs 23 against which the holder 17 rests when in the forward position (Fig. 4) thereby limiting the movement of the holder toward the inking roller 14 and maintaining a properly spaced relationship of the cup 18 with that roller.

A spring 24 maintains the holder 17 either in the full line or operating position (Fig. 4) or in the dotted line or cleaning position (Fig. 1). The lip 21 has a perforation 25 through which the spring 24 passes, the free extremity of the spring being curved downwardly in order to more effectively support the holder in the dotted line position and also. to permit the rearward swinging movement of the holder when in the cleaning position.

Reference is made to the roller as having studs 19. It is these studs that produce the dots when the instrument is drawn across the paper. The drawing illustrates the roller 13 as being almost as broad as the space between the side plates 4 and the studs 19 as being numerous. A stud orv dot roller of this particular type will produce a broad band of dots. It is readily conceivable, and in fact is intended to be regarded as part of the invention, to provide a supply of various widths of rollers 13 having studs arranged in various kinds of groups and made to produce various types of dots, the

various rollers being interchangeable according to particular needs.

The operation may readily be understood from the foregoing description. It is to be observed that the forward end of the side plate 4 nearest the observer in Figures 1 and 4 extends rather far down toward the dot roller 13 thereby providing a guide WlllOll is intended to slide along the T-square or straight edge when using the instrument, thereby preventing the roller itself from contacting the straight edge and thus restricting the rotation. It is optional whether both side plates be shaped alike in this particular respect, and for present purposes both may be regarded as being shaped alike so that the instrument may be used either by the right or left hand of the artist.

The instrument is filled with ink or color by simply placing the latter in the space between the inking roller 14 and the cup 18. The ink remains in place by capillary attraction much on the order that the ink remains in place between the blades of an or-- dinary ruling pen. Upon running the instrument along the edge of a T-square or the like, the dot or stud roller 13 being in contact with the paper, a rotation of both rollers is set up, the contacting roller 14 spreading a thin layer'of ink over the studs 19 so that the dots are printed on the paper. A "forward pressure on the lip 21 swings the holder 17 backward (dotted lines in Figure 1) so that it may be cleaned. The ends of the inking roller shaft 12 can 'be taken between two fingers of one hand and moved backward out of the slots 10 for cleaning. If desired, the ends 16 of the springs 8 can be sprung to let the inking roller drop out. The dot roller 13 may be removed either by pulling on the shaft 11 or by displacing the arms 15 of the springs so that the roller may drop out.

lVhile the construction and arrangement of the improved drawing instrument as herein described and claimed is that of a generally preferred form, obviously modifications and'change may be made without departing from the spirit of the invention or the scope of the claims.

I claim 1. A drawing instrument comprising a handle, marking means which is continuously revoluble upon movement of the instrument while in contact with a surface, an inking roller in contact with said means to ink the same for the making of marks, and a holder terminating in a curved portion constituting a cup to contain a supply of ink into which said inking roller dips.

2. A drawing instrument comprising a handle, marking means which is continuously revoluble upon movement of the in strument while in contact with a surface, an inking roller in contact with said means to ink the same for the making of marks, a holder terminating in a curved portion constituting a cup to contain a su ply of ink into which said inking roller dips, means for holding the cup in a predetermined relationship to the inking roller, and means ineluding a spring for keeping the holder in contact with said holding means.

3. A drawing instrument comprising a handle, a head carried thereby including a plate, a roller having a prearranged assortment of studs to produce a correspondingly figured indication upon a printing surface, meansincluding a shaft by which said roller is journaled upon the plate, an inking roller situated behind the stud roller and having contact with the studs, means including a shaft by which said roller is journaled upon the same plate, ink'holdingmeans hinged'ly mounted upon said plate including a cup adjacent to the inking roller, means exerting pressure on the holding means tourge the cup toward said roller, and means carried by the plate for limiting the movement of the holder and cup toward said roller.

l. A drawing instrument comprising a handle, a head carried thereby consisting of a pair of side plates each having a pair of aligning slots, a studded roller having a shaft occupying one pair of slots, ac'ontacting inking roller having a shaftnecupying the other pair of slots, means including a spring mounted on each plate having suitablyshaped portions to engage the shafts and hold them in their respective slots and means by which saidholding means are fixedly mounted upon said plates. 7

' 5. A drawing instrument comprising a i handle, a head carried thereby consisting of a pair of plates each having a pair of slots in transverse alignment, a studded roller having a shaft occupying one pair of slots, an inkingroller having a shaft occupying the other pair of slots, means including substaaitially U-shaped inverted springs one leg of each of which is bent to provide an arm to engage and held one of the shafts in the respective slots, the other leg being substantially straight and engaging the other shaft to hold it in its slots, said shafts being removable against the tension of said springs, and ears bent up from the respective plates and fastened over portions of said springs to hold them in fixed positions plates completing the hinge joint and providing the mounting for the holder, a spring extending through said perforation and being curved at the extremity to more readily support the holder in either an inking or cleaning. position, and means including lugs carried by the plates for limiting the movement of the holder toward the inking roller under the influence of said spring.

7. A drawing instrument comprislng a handle terminating in an enlargement, a pair of side plates afiixed to said enlargement including a bridge holding them in spaced relationship, a dot-forming roller journaled between the lat/es, an inking roller journaled between t e plates and having contact with the dot-forming roller means for removably supporting said rollers between the plates, means to supply the inking roller with ink including a holder having a cup, means by which the holder is hingedly mounted between the plates, a spring fixed upon said enlargement and passing through a portion of the holder to support it either in an inking or cleaning position, and means carried by the plate for limiting the movement of the holder toward the inking roller while in the inking position.

8. A device of the character described comprising a handle, marking means, contacting inking means, and resilient means carried by the handle revolubly supporting both simultaneously by virtue of being resilient.

9. A device of the character described comprising a handle, marking means, contacting inking. means, and ink-holding means movably mounted upon said handle so that it may be swung toward and away from said inking means.

10. A device of the character described comprising a handle, marking means having a shaft, contacting inking means having a shaft, and means carried by the handle contacting the ends of both shafts keeping them in position upon the handle during rotational movement.

AKSEL THEODOR JESPERSEN.

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