US1836148A - Fountain pen - Google Patents

Description

Dec. 15, 1931. 1:, M ASHLEy 1,836,148

FOUNTAIN PEN F'ile'd Jan. 16, 1929 Patented Dec. 15, 19/31 UNITED STATES PATENT OFFICE AppIication filed January 16, 1929. Serial No. 332,863.;

My invention relates to fountain pens.

The object of my invention is to provide a fountain pen which may be filled by the use of the cap portion of the pen.

A further object is to provide a pen construction which is free-from threaded joints.

A further object is to provide a clip which is used as a part of a valve construction and 'operated in the act of filling the pen, in one l0 form of construction herein setforth.

Referring to the drawings which form apart of this specification,

Fig. 1 is a longitudinal sectional view of a pen embodying my invention and illustratm ing a construction in which the sack constitutes practically the entire reservoir for ink, and in which the lclip is used as a valve in the filling operation.

Fig. 2 is a longitudinal sectional view of an- `other or modified form of construction, in

which the clip is not used in the filling operation, and in which the reservoir for ink is formed partly within the casing and partly within the sack portions of the pen.

w Fig. 3 is a cross sectional view taken on line 3-3 of Figure 2.

1 Figa 4 is a plan view of the top end of the c 1p.

Fig. 5 is a view of the stamped blank prior to being bent into its finished form, as illustrated in Figure 1.'

A indicates the pen section and Bfthe outer casing which is secured thereto by a friction joint at C;- in the usual manner.

D- indicates a feed-plug constructed with the usual feed-duct D- leading to the reservoir E. V

,F- indicates a small tube connected to the feed plug and in open communication with 40 the feed-duct therein by a restricted passage E. v

G indicates the pen point which is held in the usual way between the pen section and H'- indicates the cap of the pen, and is provided with the usual .cylindrical plug I'- the exposed end of which is adapted to abut the end- 1"- of the pen section in the usual manner. f The cap H 1s made long enough to sllde 45 feed-plug.

slightly beyond the middle portion of the pen casing, said casing being increased very slightly in diameter at its middle portion so that the cap will be held by friction to the casing i when used to cap the pen point. Should the cap be made shorter, it should be made to frictionally engage the casing when used as a cap for the pen, but it is not necessary that it should be a tight friction fit when placedover the casing from'the back end of 60 the casing as shown; the cap should fit the outer casing ineasy air tight sliding relation "therewith, to act to compress-air within the casing to deflate the sack on the inward stroke of the cap in the filling operation. l

. The cap is provided with a small hole J- located as shown, and this hole may be closed by a finger of the hand in the filling operation, as constructed in Figure 2, or may be closed by pressing the ball end of the clip K- over the hole during said operation. The clip K- is made to swivel on the cap projection H- and to be held in any desired position by the nut L- which is screwed onto said projection after being insertedin the space formed in the clip between the portions L-\ and L2, as will be readily understood.

The clip is made of spring metal and bends at the portion L3 thus -provi'dinga clip 8 which is short in length from the top to the ball shaped end. and yet gives a wide movementin bending at the point L8 so that a stiffer and stronger clip may be provided due to its increased eiiective length, as will be 85. readily understood. 4

' The principal reason for the use of the clip in the filling operation is to prevent any ink fr'om soiling the'finger, which might occur if ink Should leak thru the hole J. y 9 f A more important reason for positioning the ball of the clip over the hole is. that in placing the cap onto the rear end of the pen when about to write. a finger may accidentally cover the hole and thus cause air to be compressed in the casing and expel ink from the reservoir. v

Therefore` where I do not use the' clip in the filling operation. I make a number of 0o holes J- spaced around the circumference of the cap adjacent the element I- to prevent such an accident, but this construction requires all of said holes to be closed by the fingers in filling the pen, and this is not so filler is required` whereas. in Figure 1, a`

single stroke issuiiicient if the cap is made as long in proportion as illustrated in the drawings, and in this event,r no inner tube is necessary. Where the reservoir is large, and the cap is made short in length. a number of strokes will be necessary to fill the reservoir.

In filling the reservoir, the pen section is inserted in the ink receptacle below the surface of the ink therein, and after closing the hole J in the cap. the cap is forced over the casing. thus trapping air in the cap and forcing it into the casing to collapse'the sack. and

on the outward stroke of the cap, the air is rarefied and ink drawn into the reservoir as the sack expands. On the second inward stroke of the cap. the air above the surface of the ink-in the reservoir. is forced out thru the air tube F- when the sack is deflated. a portion of the ink being trapped in the reservoir. and on the next expansion of the sack,

due to its resiliency. the reservoir will draw a-further supply of ink into the reservoir, as will be readily understood.

This construction may be provided at a low cost. and may be made of any desired material commonly used in makina' fountain pens.

.Having thus described my invention, I claim as new:

1. A fountain pen comprising a casinghavim! a hole at the end. a sack therein. a cap adapted to cap the pen and also fitted to slide over the casing to defiate the sack in the act of filling the pen. said cap having a hole therein` al clip for said cap the free end of which is locatedl over said hole and adapted to close the same.

2. A fountain pen comprising a casing having a hole at the end and a pen section, a feed plug in said section, a rubberv sack, a cap adapted to cap the pen and also fitted to slide over the casing in direct contact therewith to deflate the sack in the act of filling the pen; a ycylindrical plug` in the closed end of the cap, the one end of which serves as an abutment for limiting mounting movement of the cap on the casing and pen'section, and said cap having a hole in its side wall adjacent to and outwardly 'of said abutment, and means carried by the'cap for manually closing said hole.

3. As stated in claim 2; and an air escape the pen, and means carried by the cap adapted to abut the end of the pen section, said cap having a hole in its side adjacent the end of said means. v

5. As stated in claim 4; and a spring c11p carried by the cap to close said hole 1n its side.,

In testimony whereof I have aiiixed my signature.

FRANK M. ASHLEY.

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