US20028A

US20028A - Inkstand

Info

Publication number: US20028A
Authority: US
Publication date: 1858-04-27
Anticipated expiration: 1875-04-27

Description

J. M. BATCHBLDER.

INKSTAND. No. 20,028. Patented Apr. 27, 1858.

E 1. l I 0 I /fl 5- UNITED STATES PATENT OFFICE.

JOHN M. BATGHELDER, OF- CAMBRIDGE, MASSACHUSETTS.

INKSTAND.

Specification of Letters Patent No. 20,028, dated April 27, 1858.

To all whom, 'it may concern:

Be it known that I, JOHN M. BATCHELDER, of Cambridge, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Inkstands; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters and figures marked thereon.

Figure I, is a vertical section through the center of the stand. Fig. II, horizontal section on the line 0, P. Fig. III, common form of the dipping-cup section. Fig. IV, section on the line J, Fig.'III.

This inkstand is so constructed that the ink is raised or lowered within the dipping cup by screwing the cup down orup, the ink being displaced or elevated as the dippingcup enters below the surface of the ink, the elevation being in proportion to the relative area of the surface of the ink and the base of the dipping cup or plunger. The central or movable part combines in one piece three parts, which, in the French inkstand now in common use are made in three separate pieces, namely, the screw, the plunger and the dipping cup.

In Fig. I, the stand or vessel for containing the ink is. seen at A; in the top of this stand a ring B is fitted, having a screw 0 upon its inner edge. In the central part D, which is made of glass or porcelain, there is a conical cavity G into which the ink I enters through a small aperture H at its base. At-

the top of this central piece there is a projection or head E forming a suitable hold for the fingers when the cup is to be raised or lowered. The outside of this central piece D has a screw F cast upon it, the form of this piece being cylindrical. This screw represented in Figs. III and IV, the lines Q,

R, S showing the form given to it for the purpose of displacing the ink, and in Fig. IV the relative area is seen by comparing the ring T with the ring U.

The elevation of the ink within the dipping-cup in my improved inkstand, constructed as herein described, is effected by lowering the cup into the stand and thus causing the ink, that previously occupied the place of the plunger or lower part of the dipping-cup, to assume a higher level; this action having no reference whatever to condensed air, or dilference of atmospheric pressure.

What I claim is I An inkstand having a central dippingcup with an exterior screw by which it is raised anddepressed causing 2. corresponding rise and fall of the ink in the stand as the plunger enters and leaves it, the combined screw, dipping-cup and plunger being made in one piece.

JOI-INM; BATOHELDER. [L. 8.

In presence of EDW. F. BROWN, J. Q. ADAMS, Jr.