IMPROVEMENTS IN MICROSCOPIC APPARATUS
Year: 1870

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, for the Invention of
"IMPROVEMENTS IN MICROSCOPIC APPARATUS."-A communication from
abroad by James Lloyd Oliver, of Boston, Massachusetts, United
States of America.
Sealed the 11th November 1870, and dated the 15th September 1870.
COMPLETE SPECIFICATION filed by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 15th September 1870, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
5 TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton
Buildings, London, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
MICROSCOPIC APPARATUS," and have petitioned Her Majesty to grant unto
mc, my exccutors, administrators, and assigns, Her Royal Letters

page_text: Patent for the same, and have made solemn Declaration that it has been
communicated to me from abroad by James Lloyd Oliver, of Boston,
Massachusetts, United States of America.
NOW KNOW YE, that I, the said George Haseltine, do hereby declare
that the following Complete Specification, under my hand and seal,
fully describes and ascertains the nature of the said Invention, and in
what manner the same is to be performed, in and by the following
statement, reference being had to the accompanying Drawing, in which
Figure 1 is a plan; Figures 2 and 3, edge_elevations; and Figure 4 a
vertical section of the stage and finding slides of a microscope, with
the addition thereto of my improvements.
The Invention herein embodied relates to such improvements in the
production of microscopes or the supporting and operating mechanism.
of the same, as shall enable the position of an object to be immediately
ascertained and adjusted beneath the lens thereof, at any time or
number of times, the object of the Invention being to avoid the
perplexing delays and annoyances inseparable from present modes of
accomplishing such results, and producing a sensitive and accurate yet
rapid means of fixing the desired object in range of the eye.
This Invention consists in combining with the stage so called and the
two slides mounted upon it, which together support the object glass to
be viewed, two scales or indices, one of which reads to and fro directly
in front of the reader and the other in a direction at right angles to his
line of vision, the former being engraved or fixed upon the upper
surface of the "stage," and the latter upon the upper surface of the
uppermost of the two sliding plates before-mentioned. In order to
'avoid prolixity of words and phrases, I term the last-mentioned scale
a scale of longitude, and the first a scale of latitude, since the move-
.ments of the slider with respect to the eye of the observer and the
"stage" of the instrument resemble the movements used in ascertaining
latitude and longitude, with this exception, however, that the scales
exhibited in my Invention read from one end only in order to avoid the
duplicate movements corresponding to east and west longitude or north
and south latitude.
With the above preface attention is called to the accompanying
Drawing, which illustrates my Invention, in which A denotes the flat
alled of a minvessons stand. R and yo

page_text: the two plates or slides which support the glass slab containing the
object to be displayed and examined. The plate B is the lower plate,
and slides upon the upper face of the "stage," and moves to and fro
in front of, and in alignment with, the direct vision of the user, the
movements of such plate upon the stage being effected by the direct
manual efforts of the user, or by the use of a screw swivelled to the
stage and screwing through a convenient part of the said plate as shown
at a in the accompanying Drawing. The plate C is the uppermost of
the two and slides upon the plate B, the manipulations of the said
plate C being effected by hand or by a screw applied to the two plates
in manner similar to that last above explained, the screw in this case
being seen at b in the Drawing.
The above described arrangement of the "stage" A and slides B, C,
with the pressure spring e and the stop of the latter, is the same as is
now in general use in microscopes.
In pursuance of the object of my present Invention I engrave or
otherwise affix to the upper surface of the stage A and in a conspicuous
position thereupon a scale c of uniformly graduated divisions, such scale,
as before premised, extending directly in front of the reader and in
concert with the movements of the lower slide B. A second scale d is
affixed upon the upper surface of the upper slider C and at right angles
to the scale c last mentioned, the former scale being, as before stated,
one of latitude and the latter one of longitude. The two scales c and d
are of like character, and each division thereof is to be equal in extent
to that of the diameter of the "field," so called, of the lens of the
microscope, with which the scales are to operate, consequently if a field
of one-hundredth of an inch is given the divisions of each scale should
be one-hundredths of an inch. This being the case, a movement of
either slide to the extent of the one-hundredth part of an inch will effect
a like movement of the object below the lens, which is equal to one
field of the same. Presuming the scales c and d to be graduated to the
necessities of a field of the highest power, which would in most instances
be employed, then such scales will answer for any lower power; for a
higher power, as a matter of course, the subdivisions must be more
minute.
A reading lens may be combined with the scales c and d, if considered
desirable, and as before stated the adjusting screws a and b may be
adopted or discarded as pleasure or necessity dictate.

page_text: In order to operate successfully with my Invention cach character
upon the object glass is to be fixed in turn in position below the lens
of the microscope, and the degrees of latitude and longitude correspond-
ing to this position and object accurately noted in a book, consequently
at any subsequent time this position of an object is at once obtained by
consulting the record and ascertaining the said degrees of latitude and
longitude and adjusting the slides to them.
of the microscope, and the degrees of latitude and longitude correspond-
ing to this position and object accurately noted in a book, consequently
at any subsequent time this position of an object is at once obtained by
consulting the record and ascertaining the said degrees of latitude and
longitude and adjusting the slides to them.
Having thus fully described the said Invention as communicated to
_me_by_my_foreign_correspondent, I claim,—
First. The combination with the slides of a microscope or microscopic
stand, or the object which supports and manipulates the displayed
specimens, of the two scales c and d or their equivalents for the purposes
stated.
Second. In combination with the slides or objects which support. and
manipulate the displayed specimens of microscopes of one or more
screws for accurately adjusting and maintaining the correct position of
said slides for the purposes herein-before stated.
Third. The combination in a microscopic stand or operator of the
scales c and d or their equivalents, and one or more adjusting screws
under the arrangement and for operation substantially as herein-before
set forth and explained.
In witness whereof, I, the said George Haseltine, have hereunto
set my hand and scal, this Fourteenth day of September, in the
year of our Lord One thousand eight hundred and seventy.
Witness,
D. L. WAGNER.
GEORGE HASELTINE. (L.S.)