IMPROVEMENTS IN THE METHOD OR MEANS OF PERMANENTLY AFFIX- ING THE DIVISIONS, FIGURES, AND MARKINGS TO GLASS TUBES OR CYLINDERS EMPLOYED IN THE MANUFACTURE OF CLINICAL AND OTHER THERMOMETERS, BARO- METERS, HYDROMETERS, AND SALINOMETERS, WHICH IMPROVEMENTS ARE APPLICABLE TO GRADUATED GLASS TUBES OR CYLINDERS OF EVERY DESCRIPTION
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by Alexis Danilovitch Wolochoff at the
Office of the Commissioners of Patents on the 10th January 1877.
ALEXIS DANILOVITCH WOLOCHOFF, of 127, Gray's Inn Road, in the County of
Middlesex. "IMPROVEMENTS IN THE METHOD OR MEANS OF PERMANENTLY AFFIX-
ING THE DIVISIONS, FIGURES, AND MARKINGS TO GLASS TUBES OR CYLINDERS
EMPLOYED IN THE MANUFACTURE OF CLINICAL AND OTHER THERMOMETERS, BARO-
METERS, HYDROMETERS, AND SALINOMETERS, WHICH IMPROVEMENTS ARE APPLICABLE
TO GRADUATED GLASS TUBES OR CYLINDERS OF EVERY DESCRIPTION."
The object of my improvement is to affix the divisions, figures, or markings to the
glass tubes or cylinders of clinical & other thermometers, as well as to barometers,
hydrometers, hygrometers, and salinometers, and every description of glass tubes or
cylindrical measures requiring to be divided for any specific purpose, so as to
prevent the erasure, obliteration, or removal of such divisions by friction or by
contact with liquids or acids at any temperature.
This improvement is effected as follows:-Having the tubes or cylinders manu-
factured or prepared with an enamelled or colored glass exterior surface from which
the instrument required is to be produced, the divisions, figures, or markings are
brought out by being etched by acid, or cut so as to be represented clear and
transparent on the colored or enamelled ground, or, vice versa, representing such
divisions, figures, and markings in colored or enamelled relief on a clear and trans-
parent glass ground.
The ordinary clear glass cylinders or tubes at present employed in the manu-
facture of thermometers and other instruments may also be painted with a colored
soluble glass so as to produce the like results.
The same process of affixing divisions, figures, or markings may also be applied to
glass cylinders or tubes which may be used to enclose the stem of the thermometer
or other instrument, if required, such cylinders being adjusted to the article either
before or after its completion, and sealed to it from one or both ends so as to prevent
the possibility of breakage or injury by ordinary usage.
The divisions, figures, or markings upon such a glass cylinder, used for the
purpose of enclosing the thermometer or other instrument, may also be painted
with colored soluble glass, and burnt in, or etched, or cut, and the etchings or cuttings
FD037
"

page_text: filled in with colored glass, and burnt in the usual way. In this way the cylindrical
tubes, which I employ, serve as scales, with the divisions indelibly marked upon
their exterior surface, and not as protections for the markings or divisions upon the
inner tube or "inserted scales" as now employed. It will be seen therefore that the
novelty of my Invention is, the application of glass tubes or cylinders with a
colored or enamelled exterior surface to all instruments or measures requiring
divisions, figures, or markings upon or immediately attached to and identical with
the glass cylinders from which such instruments or measures are manufactured. I
may however state that I do not confine myself to any precise manipulation in effect-
ing these my improvements.