US576596A - marsh - Google Patents

Description

(No Model.)

C. D.l MARSH. FOUNTAIN MARKING PEN.

'Patented Peb.- 9; 1897.

A citizen of the United States, residing at Wil- UNITED STATES PATENT OFFICE.

l cALvru n. iiiARsH, or WILLIAMsPoRT, PENNSYLVANIA, AssIGNoR 'ro ALBERT n. HERMANoE, oF SAME PLACE.

FoUNTAlN MARKING-PEN.

SPECIFICATION forming part of Letters Patent No. 576; 596, dated February 9, 1897.

VApplication tiled ctobcr 27| 1896. Serial No. l0,226. (No model .To ali 11:17:,0112I it :1w/y] concern,.- i.

Be it known that l, CALVIN D. MARSH, a

liarnsport, in the county of Lycoming andi State of Pennsylvania, have invented certain new and Auseful Improvements in Fountain 4Marking-Beus; and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing, making a part of this speciiication, and to the letters of reference narked thereon.

y `My invention relates to an improvement in marking-pens; and it consists in a tubular handle which forms a reservoir for the ink, a perforated nipple which is screwed upon the end of the handle and grooved in its outer end to receive ball-bearings, and a ball journaled upon the ball-bearings combined with a cap which is screwed upon the nipple and suitable packings which are applied to the.

parts so as to prevent any possibility of leaking, all of which will be more fully described hereinafter. p

The object of my invention is to provide a marking-penwhich is to be used upon rough surfaces where ordinary pens cannot be used and so pack the parts that no leakage can possibly take place. l

In the accompanying drawing a pen ein bodying my invention is shown in lon gitudinal vertical section.

A represents the tubular handle, which forms a reservoir for the ink and which is prop vided with screw-threads upon its inner end to receive the nipple B, which is screwed directly upon it. This handle A is tightly closed at its outer end, so that no air can beadmitted at that point. To till this reservoir, it must be removed entirely from the nipple and filled through its inner end.

The nipple B is provided with an-internal thread at its inner end Where it screws over the inner end of the handle, and at the bottom of this screw-thread is formed a seat C, upon which the perforated packing D is placed. The end of the handle A compresses this packingl) against its seat sufficiently to A form a tight joint between the end of the handle and the nipple, so that no leakage lcan possibly take place even if the thread upon the handle should become slightly Worn.

'lhe'great trouble with pens of this kind hasv been heretofore that the handle waslled l through it-s outer end, which had to be provided with a cap or a valvewhich would soon leak air, and thus ruin the efficiency of the4 pen.' It the outer end of the handle is closed, as here shown, and no provision is made for a packing, the wearing of the thread is liable to cause leakage at its junction with the nipple, and hence the usefulness-of the pen is greatly impaired, ifv not entirely destroyed.

The outer end of the nipple is screW-threaded, so as to receive the cap G, and in this threaded portion is formed a groove in which the packing I is placed. The cap G tits snugly upon the outer end of the nipple B, and this packing forms a tight joint to prevent the ink ing for the large ball Q, with which the marking is'done. The cap G has its outer end tapered, as shown, and its inner bore is slightly contracted, so as to prevent lthe ball Q from falling through, and at the same time form a bearing for thefball in connection with the one which is formed by the small balls l. The contraction of the bore of the cap also -t'orins a bearing for the rubber packing O',

which is applied tothe end ofthe nipple and effectually prevents any leakage when the iiow of ink is to be shut o. y

The opening through the nipple B is contracted so as to form but a very small opening through its outer end and through which the ink is fed to the ball Q. This ink escapes in between the balls P, down over the top of the ball Q, and then between the inner edges of the cap Gand the outer sides of the ball, and as the ball revolves its marking-surface is kept constantly covered with ink. I By tightening or loosening the cap -G the amount of ink upon the ball Q is regulated at the will Sol IOO

of the operator. Byscrewing the cap inward, so that its outer end lits tightly against the ball, the supply of ink is shut o entirely.

, There are many advantages in a markingpen constructed in accordance with my invention, especially in having the pen closed at its upper end, over one provided with a cap at its upper end, from the fact that, when a cap is screwed or fastened on` its upper end there is a cert-ain amount of air that will enter between the fluid and the cap, which will form a pressure when the cap is screwed down thereby forcing the fluid out at the lower end of the pen as well as through the screw-joints of the cap, causing leakage at' both ends. These several objections are entirely removed by having the pen closed at the top and constructing it in three sections and inserting a nipple between the markingball and the tube, thus enablingv the nipple to be removed and the tube filled from its lower end instead of at its u pper end, asheretofore.

A further ad vantage in constructing a marking-pen with the nipple between the tube and the lower cap which holds the marking-ball in position, is that the nipple can be removed entirely from the tube Without displacingthe marking-ball, and when the nipple is replaced on the tube by screwing the lower cap one or more turns the air is allweo pass out through the hole iu the center of the nipple and out through the lower cap.

An additional advantage in the employment of a removable nipple is that markingballs of dilerent diameters for making. a heavy or light mark may be used by the employment of diEerent-sized nipples which may be used on thesame tube, whereas this class of marking-pens have' been confined to a singie diameter of marking-ball, and owing to their construction dilerentsized markingballs couldnot be used in the same pen.

The cap at the lower end may be loosened while the tube is filled with fluid, which will allow the marking-ball to revolve, but when tightened it closes tightly on the ball and ef fectually closes the pen, thereby preventing leakage.

It will thus be seen that a pen constructed 5o as hereinbefore described includes advantages not found in any of the pens provided with a marking-ball and possesses durability as well as electiveness and also simplicity in construction. Y

Having thus described my invention, I claim- 1. A marking-pen, consisting of a hollow." handle which is closed at its outer end, a nipple having an opening extending through it, an adjustable cap, and the ball Q, all combined substantially as shown and described.

2. In a marking-pen,the handle A closed 'at its outer end, the nipple B, provided with an internal 4screw at its inner end so as to it upon the inner end of the handle, Jand an extern'al thread at its outer end and provided with the groove `O; balls P placed in said groove; and the large ballV Q, combined with the internally screw threaded Acap -which' screws upon the nipple; the nipple being provided With'a` groove to* receive thepaokingl, which is placed therein, substantially as de scribed.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

CALVIN D. MARSH.

lVitnesses:

I-I. RUSSELL HILL, J. CLINTON HILL.l

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