US982922A

US982922A - Fountain-pen.

Info

Publication number: US982922A
Application number: US52902609A
Authority: US
Inventors: Frank M Ashley
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-11-20
Filing date: 1909-11-20
Publication date: 1911-01-31
Anticipated expiration: 1928-01-31

Description

-end of the wall of vthe, opening B UNITED `STATES APATENT'r OFFICE.

raamt M. ASHLEY, or New YORK, N. Y,

FOUNTAIN-PEN.

Slieceation of Letters Patent.

`To all whom 'it may concern.'

Be it known thatI, FRANK M. ASHLEY,

p a citizen of the United States, and aresident of New York city, in thecounty of Kings and State of New York, have invented certain new and useful Improvements in Fountain-Pens, of which the following is a specication.

My invention relates to fountain pens, and particularly to that class known as self filling fountain pens.

The object of my invention is to provide a pen which will be simple in its construe'- tion, durable and easy to lill.'

Referring to the drawings which form part of this specification, Figure 1, is a central sectional view of my pen showing the casing with a piston fitted `to the interior bore of the casing. Fig. 2, is a sectional view ofthe rear end ofthe pen, enlarged.4

Fig. 3, is a central sectional View of the rear pen, showing a modified form of joint.

A, indicates the casing of the pen, the in.

terior of which is made' cylindrical in form and constitutes the reservoir for ink.

B, is a cylindrical opening formed inthe front end of the easing A. v

Fitted into the opening B, is a pen plug E which is provided with the usualink duct E', and F, is the pen point which is heldl by friction between the plug E and the inner in a' manner well known in the art.'

Fitted in therear end of the reservoir D,

is a piston G, which is I'tted to slidinglyv engage the inner wall of the casing, and is provided at its rear end with 'a' projecting stem G' which has a cone shaped valve G2 formed integral therewith. The piston G is fitted in liquid tightA relation to the wall of the casing, and does not move therein except as'actuated by operating the cap H.

The casing A is` provided with a cap H which is joined to the casing by a screw thread I,l and the outer diameter of the cap is the same as that of the casing, and the inner diameter is the same as thaty of the reservoir. TheV cap is provided withan opening H2 through whichv the Stern G may project, and is concave in form at its end so that thestem willnot be moved by Contact with 'users apparel. The stem is provided with asmall. hole Gr3 through which a wire may be inserted to operate the piston if desired.

Making the thread on the 'outer surface of the cap allows a longer piston to be used and hold" the piston entirely within the cap when it is removed from the casing. In the cap or casing, as the case may be, 1s a small hole J which is normally closed bythe joint I, but which may be opened 'by loosening the said joint. This opening is for 'the' pur-A pose of'ventin the .reservoir so' that any rarefaction which might be created therein due to the withdrawal of ink therefrom Patented Jan. 31,1911.

may be destroyed, thereby allowing the ink yslightly greater diameter between the two dotted lines shown in Fig. 1, so thatthe end of the tube K will t fairly tight when'it engages the casing at this point. The tube K serves as a cap for the'pen point, as `illustrated by the dotted lines.

The operation is vas follows To ll the pen reservoir, withdraw the tube K from the casing and press the piston in as far as possible by pressing on the stem G', and then, after'fplacing the thumb over the erforation the tube K, force the sai tube over :the casing A.' .This will trap the air in the tube K "behind the piston 'G, and the air as it is compressed by themovement of the tube relative tothe casing, will 'force the piston to the front end of the reservoir, thus expelling 'any air or ink therein and ^by placing the end of the pen plu below the surface of the ink receptacle, an withdrawing 'the tube K slowly from thev casingthe piston will be drawn to the rear end of the voir by the movement of the tube over the i casing, Should the piston stick in the reservoir, it may be moved by securing an increased pressure of air by trapping a fresh ortion of air behind the piston, if it sticks 1n its forward movement, or an increased rarefaction if it sticks in its backward movement. This is accomplished by rma- 20 the reason that the wire or the person who desires -to lill the pen may the air in the casing above the ink. To cor rect this fault, open the vent J slightly by unscrewing the joint I, thus admlttmg ,air

` to the reservoir, and then close again, and 5 the ink will flow freely..

In the prior art, in so far as I am aware. no piston has been used in the reservoir Which was fitted in liquid' tight relation therewith, which was operated by air pressure. The types of piston heretofore oper- 'ated by air would more properly be termed a float, ,which was guided by the walls of the reservoir and wasV carried through the res-4 ervoir by the ink as it moved up and down 15 in thereservoir. Where the piston has been fitted in liquid tight relation with the reservoir, ithas been operated by means of a wire or other direct mechanical operation, and this arrangement is objectionable for may become lost,

not be skilled in attaching the wire to thc piston when they desire to operate the same.

Having thus described my invention, what. I .claim as new and desire to secure by Letters Patent isv 1. The combination in a fountain pen, of

a casing, a liquid-tight piston longitudinally movable within said casing; and means for rarefying or compressing air at one side of` -a casing externally enlarged at an 'intermediate point andl having an opening'at its rear end,v a liquid-tight piston longitudinally movable Within said'casing, and an elongated tube mounted on said casing and adapted. when in full position thereon to be engaged with the casing enlargement and the tube thus held against undesirable movement, said tube operating through its move- -V Aments to compress and rarefy the air at one side of the piston? and thereby positively actuate the latter.

4. The combination in a fountain pen, of a casing containing a reservoir having an olpening at its rear end, a cap connected to t e casing at the rear end thereoflprovided \with an opening in one end thereof, and recessed-to receive av piston, a liquid tight lpiston longitudinally movable within said reservoir, and an elongated tube longitudinally l movable in close relation with said casing, and through ther positively operatethe latter.

a casing containing l its movements compress or. 'rare air at one s1de of the piston and 5. The combination in a fountain pen, of a reservoir, provided with a perforation 1n its side near 4its rear end, a cap screwed to said casing and adapted' to close said perforation in the side of said casing, said cap having an opening in its rear end, a liquld tight piston longitu dinallymovable within said reservoir, and an elongated tube longitudinally movable through its movements compress or rarefy air at one side ofthe piston and thereby positively operate the latter.

6. The combination in a fountain en, of

a casin containing a reservoir, a per orat-ed recesse cap at one end of said reservoir, a liquid-tight piston longitudinally movable Within said reservoir and adapted to be completel and an e ongated tube longitudinally movable in close relation with said casing, and

through its movements compress or rarefy air at loneyside of the piston andthereby positively operate the latter.

7. The combination in a'. fountain en, of a casing, containin a reservoir, a per orated cap at one end o said reservoir, a liquidtight piston lion itudinally movable within the reservoir an having a stem adapted to pass through and project beyondV the cap l perforation and close the same, and an elongated tube longitudinally movable in close relation with the casing /a'nd through its movements compress or rarefy air at one side of the piston and thereby positively operate the latter. y 8. The combination in a fountain en, of

a casi`n containing a reservoir, a per orated recesse cap at the rear'endof the reservoir and .controlling a vent opening in said cas ing, a li luid-tight piston longitudinally movable within said reservoir and adapted to be completel received within the cap vrecess and close he said opening at the rear .end of said casing, and an elongated tube longitudinally movable in close relation with the casing, and through its movements compress or rarefy air at one side of the Apiston and thereby positively operate the' latter.

9. The combination in a fountain pen, of a casing open at itsfrear end, containing a' perforated cap at the rea-r end of said reser voir and controlling a vent opening in the side of said casing, a liquid-tight piston longitudinally movable within the reservoir and having a stem adapted to close the cap perforation and project beyond the same, and an elongated tube longitudinally movable in close relation with the casing and through its movements com ress and rarefy the airat one side of the piston and there-` by positively operate the latter.

10. The combination in a fountain pen of 13o a casing containing a perforated recessedv 1n close relation withl said casing, and

received within. the cap recess,'

v recess,

Vthrough the cap perforation to close and cap at the rear end of the said reservoir and controlling a vent opening in the side of said' easin a liquid-tight piston longitudinally Inova le Within said reservoir*y and ladapted to be completely received 'Within the cap and having a stern for passing I.1nd an elongated project beyond the same,

in close relatube longitudinally movable 1o tion with the casing and through its movements compress or rarefy air at one side of the piston `and thereby positively operate the latter.

Signed at New York city in the county of New York and State of New York this 19th 15