US232804A - Alonzo t - Google Patents

Description

(No Model.)

A. T-. CROSS. Stylogrmphio Pen.

No. 232,804. Patented 0a., 5, I880.

Witness es.

arrest PATENT ALONZO T. CROSS, OF PROVIDENCE, RHODE ISLAND.

STYLOGRAPHIC PEN.

SPECIFICATION forming part of Letters Patent No. 232,804, dated October 5, 1880. Application filed May 27, 1880. (No model.)

To all whom it may concern:

Be it known that I, ALONZO T. Onoss, of Providence, in the State of Rhode Island, have invented an Improvement in Stylographic Fountain-Pens, of which the following is a specification.

The nature of my invention consists in a centrally-arranged air-tube, closed at its upper end by means of a removable plug, and having aside aperture made near the bottom of the plug, for the proper admission of air to the inkchamber, under the control of a vent-cap.

It also consists in providing means for the passage of air from the air-tube into the inkchamber to control the flow of ink to the point of the pen by slotting the lower end of the air-tube, or an extension thereof, and connecting loosely thereto the cylindrical upper portion of the vibrating spindle, so that the vibration of the spindle in the act of writing may assist in passing the air into the ink-chamber.

My invention also consists in a removable point-tube frictionally held in a point-section provided interiorly with a contraction or shoulder, serving to limit the degree of insertion of the tube.

Figure 1 represents the exterior of the pen when completely closed for carrying in the pocket. Fig. 2 is a longitudinal section. Fig. 3 is a transverse section taken in the line as w of Fig. 4. Fig. 4 is an enlarged longitudinal section of the point-section of the pen.

In the accompanying drawings, A is the in kreservoir, preferably made of hard rubber or similar material; B, the point-section; O, the vent-cap; D, the centrally-arranged air-tube, and E the point-cap.

The upper end of the air-tube D is closed by the screw-plug d, a small aperture, b, being made from the side of the screw a to the airtube. The plug (1 serves to prevent persons from i gnoran tly attempting to fill the pen with ink through the air-tube, as heretofore, and at the same time permitting access to the interior of the air-tube in case of necessary cleaning by simply removingthe plug.

Whenever a drop of ink has entered the airtube and the pen is reversed for carrying in the pocket the ink will flow past the orifice 1) toward the plug 61 without being forced out of the vent-aperture, so as to reach the thread of the screw, as heretofore. The screw a is preferably made in one piece with the hard-rubber reservoir A, thus avoiding a joint liable to work loose in screwing down the vent-cap.

The lower end of the air-tube or its extensions is provided with one or more open slots, 0, which abut upon the loose washer F, held against the end of the tube by means of the spindle-actuatin g spring G. The enlarged cylindrical portion of the spindle H enters the bore of the tube D to about the upper end of the slot 0, and is loosely held by means of the pin I passing through the slot It made in the enlargement of the spindle. The vibrating movement of the spindle caused by the act of writing tends, in this case, to assist the air to pass in small bubbles from the air tube through the upper end of the slot 0 into the ink-chamber, thus properly graduating the supply of ink to the point of the pen.

The lower end of the bore of the point-section Bis provided with a contraction or shoulder, 0, which serves to limit the degree of insertion of the frictionallyheld point-tube J. The lower end of the point-tube is drilled out to receive the tubular wear-resisting tip K, which rests against the shoulder j, the upper end of the tube K being slightly countersunk in order to suitably guide the insertion of the spindle when placing the point-section upon the handle or reservoir of the pen.

In stylographic fountain-pens as heretofore constructed the point-tube has been permanently secured to the point-section, so that in case of wear or injury it has been necessary to adapt a new point-section to the handle or reservoir, which involves a considerable unnecessary expense; but by my improvement the point-tube is simply held by slight friction, so that it may be readily withdrawn and a new one inserted when necessary, thus avoiding the waste of the hard-rubber point-section. The contraction or shoulder in the bore of the point-section serves as a stop to limit the insertion of the point-tube to its proper relation with the point of the writing-spindle without the necessity of special adjustment.

I claim as my invention- 1. In a fountain-pen, the combination of a vent-cap, G, with an air-tube, D, closed at its upper end by a removable plug, cl, and provided with a side orifice, I), located below the plug and covered by the vent-cap, substantially as described.

2. In a fountain-pen, the air-tube D, provided with one or more open slots or notches, 0, made at its lower end, in combination with the enlarged portion of the vibrating spindle H, which enters the bore of the air-tube to a point near the upper end of the slot 0, and is loosely held by means of the pin I and slot h, and operated by the spring G, so that in the act of writing the vibration of the spindle will serve to assist the passage of air from the lower portion of the air-tube to the ink-chamber.

3. In afountain-pen, the removable frictionally-held point-tube J, in combination with a point-section, B, provided with a contraction or shoulder, e, substantially as and for the purpose set forth. 1

' ALONZO T. onoss.

Witnesses:

JOSEPH J. SOHOLFIELD, H. W. HUBBARD.

Images