US281903A - James mckenzie - Google Patents

Description

(M0del.)

J. MCKENZIE STYLOGRAPHIG PEN.

No. 281,903. Patented July 24, 1883.

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separated from the reservoir-section.

- parts in each of the figures.

UNITED STATES PATENT OFFICE.

JAMES MCKENZIE, OF BROOKLYN, NEW V YORK.

STYLOGRAPHIC PEN.

SP'EQIFIGATION forming part of Letters Patent No. 281,903, dated July 24;, 1883.

I Application filed November 27,1882. (ModeL) To all whom it may concern:

Be it known that I, JAMES MCKENZIE, of Brooklyn, in the county of Kings, and in the State of New York, have invented certain new and useful 1 Improvements in Stylographic Pens; and I do hereby declare that the follow ing is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in. which Figure 1 is a perspective view of my pen as arranged for the pocket. Fig. 2 is alike view of the same with its point-section and air-cap Fig. 3 is a perspective view of the needle, socket, plug, and spring separated from each other and from the point-section. Fig. 4. is a cen-.

tral longitudinal section of the pen complete,

and Fig. 5 is a like view of the point-section enlarged.

Letters of like name and kind refer to like The design of my invention is to increase the efficiency of stylographic or reservoir pens; and it consists in the construction, arrange ment, and combination of parts, as hereinafter described, and specifically pointed out in the claims. I V

In the annexed drawings, A represents the main or reservoir section of my pen, which has the usual cylindrical form, and is provided upon one end with an external thread, a, for the reception of an air-cap, B, and within its opposite end has an internal screw-thread, a;

At the axial center of the section A is an airtube, 0, that has one end, which is open,fitted closely into and through the upper end of said section, in the usual manner, while its opposite end projects slightly beyond the corresponding end of said section and is closed, as shown, the space around said tube being for the reception of ink. The cap B, when screwed down against the shoulder which terminates the screw-thread a, prevents the admission of air through the upper end of said air-tube; but when said cap is slightly retracted, air will pass beneath its lower end, and, through slots If, that are cut in the said threaded upper end of said section A, will enter said tube. Air is permitted to escape from said tube into the interior of the pen through an opening, 0,

that is preferably placed at a little distance abovethe lower end of the former.

A point-section, D, having the usual exterior form, is adapted to screw into the lower threaded end of the reservoir-section A, and is provided with the ordinary removable cap, E, for inclosing its point when not in use. The point-section D is provided with the usual axial opening, but the lower end of the main portion cl of said opening is made semi-spherical, instead of square, as has heretofore been the custom. From the main opening dto the point of said section the needle-opening d is slightly tapering, its largest end being uppermost.

Fitted within the opening (2 of the pointsection D is a square block or socket, F, which has such transverse dimensions as to cause it to be readily placedwithin or removed from said opening, and has such length as to cause it to fill the space between the lower end of said opening and the lower end of the airtube 0. The socket F has a round axial opening, f, which extends from its upper end nearly to its lower end, and within the same is" an internal screw-thread. The lower end of the air-tube G is reduced in size, and such reduced part c fits into said opening, and thereby insures the relative positions of said parts. In consequence of the square form of said socket, sufficientspace is left between its sides and the sides of the opening (I of the pointsection for the downward passage of ink, while from the semi-spherical form of the lower end of said opening the corners only of said socket come into contact therewith, and the ink flows freely beneath the latter and is directed into the needle-opening d.

From the opening f of the socket F a small opening, f, extends through the lower end of said socket, and receives a needle, G, that, near its upper end, is provided with a head oncollar, g, which nearly fills said opening f laterally. Above said collar 9 is a reduced part, around or upon which is a spiral spring, H, that has alength considerably greater than the length of said reduced portion, and is confined between the shoulder which forms the lower end of the same and a plug, I, which is threaded exteriorly and is screwed clownward within said threaded opening f, the ar- 7 for writing purposes.

rangement being such as to cause said needle I tube adapted at its lower end to maintain the to be held with a yielding pressure at the lower limit of its 1notion,with said collar in engagement with the lower end of said openef- The opening (1 within the point-section D is slightly tapering, as before stated, and the needle G has a corresponding taper, so that when said needle is at the lower limit of its motion, with its point projecting slightly from the point of said section D, said opening (1 is practically closed and no ink can escape; but when said needle is raised by contact of'its point with the surface being written upon, sufficient space will be left around the same for the passage of the necessary quantity of ink The'pen "is now complete,and,when used in the ordinary manner, furnishes a steady flow of ink while the reservoir is supplied. The needle is held at the exact axial center of the pen, and cannot be displaced therefrom while in use, but is perfectly free to move longitudinally, as is necessary in order to permit ink to flow from the point. Said needle and its socket may be easily and quickly taken from or placed within the pen whenever necessary for the purpose of cleaning the same.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s 1. In combination with the needle-socket, the air and reservoir tubes, all so arranged that the end of the air-tube holds the socket centrally in position, while its end rests against the bottom of the reservoir -tube, substan tially as and for the purpose set forth.

2. In combination with the movable needlesocket normally resting against the bottom of the reservoir-tube, the air-tube having its end adapted to enter the upper end of the socket and keep the same in a central position within the reservoir-tube, substantially as and for the purpose set forth.

3. In combination with the reservoir-tube having concave bottom, the needle socket, square in cross section, normally resting against the bottom of the tube, and the air needle-socket in its proper. central position, substantially as and for the purpose set forth.

4. In a stylographic pen, the movable needle-socket centrally guided within the reservoir-tube by the lower end of the air-tube, and provided with a yielding needle and means for keeping the needle projected from the lower end of the socket, substantially as and for the purpose described.

5. In a stylographic pen, the needle-socket free to move longitudinally within the reservoir-t-ube, and carrying a yielding needle and a spring adapted to press thereon to keep it projected from the socket, substantially as set forth.

6. The socket F, free to move up and down within the reservoir-tube, and having a square form eXteriorly, and provided with a round threaded axial cavity, f, and a needle-opening, f, in combination with the needle G, having the collar 9 and reduced upper end, 9, the spring H, fitted over said reducedend, and the plug 1, fitted within said threaded opening f, substantially as and for the purpose shown.

7. In combination with the upper threaded end, a, of the section A, having the slots (6 cut through its wall, the cap 13, fitted over said threaded part and adapted to close communication with the air-tube O, substantially as and for the purpose set forth.

8. The hereinbefore described pen, consisting of the main section A, the cap B, the air-tube 0, having slots cut through its sides at its upper end, the point-section D, provid 7 ed with the openings d and d, the socket F,

having the openings f and f, the needle G, provided with the collar 9 and reduced end g, the spring H, and the plug I, all combined to operate substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 23d day of September, 1882.

JAMES MCKENZIE.

Witnesses:

SAMUEL R. MURPHY, JACOB G. CARPENTER.

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