A Pneumatic Inkstand.
Year: 1889

page_text: Date of Application, 8th July, 1889-Accepted, 10th Aug.,
1889
COMPLETE SPECIFICATION.
A Pneumatic Inkstand.
1, ALEXIUS DÓSA VON MAKFALVA, of Maros, Vásárhely, Hungary, Notary Public,
do hereby declare the nature of my said invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to certain improvements in inkstands embracing a pneumatic
device whereby the ink may be forced up into the funnel or opening of the ink-well.
and allowed to descend back into the receptacle after use.
The evaporation and corrosion of ink in the ordinary ink-wells or receptacles is a
well known disadvantage and the object of this invention is to effectively overcome
this drawback.
According to my improved construction of ink receptacles, the evaporation of the
fluid is almost entirely excluded, as a simple manipulation of the pneumatic device
will cause it to flow back in to the well, so that the ink only communicates with the
outer air through the very small tube of the funnel, thereby reducing the evaporation
to a minimum. By means of my improvements it is possible to preserve ink from
corrosion for a considerable period.
In the accompanying drawings,
Figure 1 represents a longitudinal section of the improved inkstand, and
Figure 2 a section of the closed tube B with the cross rod I.
The bed or base A of the inkstand is provided with suitable cavities in which are
located the inkwells and the tube B. The air receptacle or ball C is hermetically
attached to the extremity of the tube B by means of its inner seam D and the
india rubber ring E. Communicating with the tube B and the ink-wells M, is a
tube F, provided with cocks G, by means of which it may be opened and closed.
The ink-wells M are provided with funnels L, the narrow tubes of which almost reach
to the bottom of said receptacles.
A toothed rod H extends through the air receptacle C, which, when depressed,
engages with and is held by the tongue or projection K on the cross rod I connected
to the neck of the tube B, said rod H, however, being disengaged from the grip of K
on depressing the cross rod I by means of the knob attached thereto, thus allowing the
air receptacle C to resume its normal position.
The improved inkstand is manipulated in the following manner :-
The wells are filled with ink up to the apertures of the tube F, after which the
cocks G are opened and the air receptacle C depressed by means of the knob or
button N. Consequent upon this depression of the air receptacle the toothed rod H
is caused to effect a downward movement and to engage with the projection K of the
cross rod I, thus serving to retain said air receptacle in the position represented by
dotted lines in Figure I
This manipulation of the air receptacle forces air through the tubes B and F into
the wells M where it is condensed and consequently exerts pressure on the surface
of the ink, thus causing this to be projected upwards into the funnels L. If now the
ink is no longer required and it is desired to prevent the same evaporating, the toothed
rod H is disengaged from the projections on cross rod I, whereupon the pneumatic
ball Cascends into its normal position, thus rarefying the air in the wells M and
causing the ink to descend therein.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
A
nneumatic inkstand consisting of the arrangement of an air receptacle C.

page_text: tubes B and F and auxiliary appliances such as described, by operating which the
ink is caused to ascend and descend into and from the funnels inserted in the wells M,
substantially as and for the purpose set forth and shown.
Dated this 8th day of July 1980
W. P. THOMPSON & BOULT,
Agents.