US2250804A - Inkstand - Google Patents

Description

July 29, 1941. H. F. KRUEGl-:

INKSTAND a Filed Oct. 50, 1939 Patented `uly 29, 1941 UNITED STATES PATENT, QFFICE* 2,250,804

INKSTAND Herman Frederick Krueger, Los Angeles, Calif. Application October 30, 1939, Serial No. 301,992

(Cl. 1Z0-59) 1 Claim.

My invention concerns improvements in ink stands of the type in which ink is supplied from a main storage reservoir to a pool into which the pen is dipped and, in general, it concerns improvements upon the invention disclosed in my Patent Number 2,178,861, dated November 7, 1939.

A difficulty which I have found to be present in prior art ink stands embodying a main reservoir in communication with a dispensing pool, resides in the fact that, due to increases in temperature, the ink supply expands to a point which causes overow of the device. Another shortcoming is that when such devices are tilted from the horizontal, the dispensing ink pool is apt to overiiow. Those shortcomings have proved to be seriously objectionable features in the type of ink stand to which my invention relates.

I aim to cure those shortcomings by provid ing an ink stand which includes, in association with the ink dispensing pool, an expansion chamber to take care of any overflow caused by temperture changes.

Another object is to provide an improved passageway construction between the outlet of the main reservoir and the inlet to the dispensing pool, which will trap and prevent ink from overilowing when the device is tipped from the hori- Zontal.

Those and other objects will become clear from the following detailed description of one preferred form which my invention may take, for which purpose I refer to the accompanying drawing, in which:

Fig. 1 is a plan view;

Fig. 2 is a section on line 2-2 of Fig. 1;

Fig. 3 is a section on line 3-3 of Fig. 1;

Fig. 4 is a horizontal section on line 4 4 of Fig. 3; and

Fig. 5 is a fragmentary section on line 5-5 of Fig. 1.

Referring now to the drawing, the numeral 5 designates a base having a central cavity 6 into which snugly ts an inner casing I provided with a pair of opposite side recesses I I, a central ink receiving recess I2, a curved wall portion I forming a passageway I6 communicating from the central recess I2 to a larger recess I1 in casing I0. The latter recess communicates with side recesses II through openings I8. The bottoms of the recesses II, I2, I1 and passageway I6 are coplanar.

A cover plate 20 is mounted in the annular recess 2| in the body, said cover plate having a central opening 23 into which snugly lits a container 25 whose bottom wall 26 tapers to a restricted outlet orifice 21. The top wall 30 of the container has a round neck portion 3I annularly threaded at 32 to receive a screwthreaded cap 35. The top of the neck has an annular recess 31 into which fits a soft rubber, cork or other suitably resilient packing washer 38. Said washer is adapted to be compressed between the underface of the top wall of the cap and the shoulder 39 provided on the neck by recess 31. The cap presents a central, downwardly opening socket member 40 into which lits the top end of a valve stem 42. The bottom end of the stein 42 is enlarged and projects through orifice 21 to provide a tapered valve 44 adapted to be urged against orice 21 as a seat by coil spring 46 which seats at its bottom end within a small recess 41 formed in the bottom of casing member I0.

Stem 42 is of such length that when cap 35 is screwed down onto neck 3| valve 44 is moved oi its seat to permit ink to ilow into the central recess I2 through orice 21, and, from that recess', through passageway I6 to recess I1, thence through openings I8 into side recesses II, with which the ared pen holding members 52 communicate, The ink level L of the ink pool in said recesses and passageway is maintained substantially even with the bottom surface of outlet 21, said pool being exposed to atmospheric pressure through the openings 53 in members 52. As the ink is used, it is automatically replenished from the main container 25.

As best shown in Figs. 4 and 5, I provide for expansion of the ink in chamber I1 as, for instance, when such expansion is caused by increased temperatures. 'I'he top portion of casing member I0 adjacent chamber I1 is hollowed out tcaovide an expansion chamber whose bottom 60a is substantially even with the normal ink level L, said chamber 60 being in communi-V cation with chamber I1 so that as the ink in chambers I I, I2, I1 and passageway I6 expands, causing the ink level to rise, the overflow flows into the expansion chamber 60, thus preventing it from overflowing the device through the openings in the pen holding members 52.

As will be best seen in Fig. 4, wall I5, which forms passageway I6, is comprised of a continuous circular wall provided by concentric segments I5a, |511 connected together by a reversely curved portion I5c. Thus passageway I6 is likewise curved so that if the ink stand is tilted from the horizontal, the greater portion of the ink within chamber l2 and passageway I6 is trapped by wall l5.

While, in the foregoing description, I have resortedto various details of structure and association of parts, I Wish it understood that I do not thereby conne my invention to such specic details. Rather, various modifications and adaptations may be made within the broader scope of the invention as deiined by the appended claim.

I claim: v

In an ink stand, a base having therein an ink reservoir and an ink dispensing chamber, spaced concentric circular walls separating the reservoir from the chamber, said walls forming a cir-v cuitous passageway therebetween, another wall between the outermost of the circular walls and the dispensing chamber and a communication opening in said other Wall, said circuitous passageway terminating at a point laterally spaced from said opening.

' HERMAN FREDERICK KRUEGER;

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