AN IMPROVE- MENT IN LEVELS AND OTHER INSTRUMENTS REQUIRING NICE ADJUSTMENT
Year: 1864

page_text: LETTERS PATENT to Frederick Bernard Doering, of Bayswater, in the
County of Middlesex, Civil Engineer, for the Invention of "AN IMPROVE-
MENT IN LEVELS AND OTHER INSTRUMENTS REQUIRING NICE ADJUSTMENT."
Sealed the 26th May 1865, and dated the 30th November 1864.
PROVISIONAL SPECIFICATION left by the said Frederick Bernard Doering,
at the Office of the Commissioners of Patents, with his Petition, ou
the 30th November 1864.
I,FREDERICK BERNARD DŒERING, of Bayswater, in the County of Middlesex,
Civil Engineer, do hereby declare the nature of the said Invention for "AN
IMPROVEMENT IN LEVELS AND OTHER INSTRUMENTS REQUIRING NICE ADJUSTMENT,"
to be as follows:-
My Invention refers to means of readily and nicely adjusting levels and
other instruments. My Invention consists in supporting the instrument upon
a universal joint a, a, (see the annexed Drawing) with vertical arcs b, b,
capable of being clamped to one another, and to the frame so as to admit when
unclamped of ready adjustment by hand,and when clamped of perfect adjust-
ment by tangent screws cc. One of the arcs b,b,may be divided into degrees
for measuring vertical angles.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Bernard Doering in the Great Seal Patent Office on
the 30th May 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
BERNARD DŒERING, of Bayswater, in the County of Middlesex, Civil Engineer,
send greeting.
unto me,
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of November, in the year of our Lord
One thousand eight hundred and sixty-four, in the twenty-eighth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
the said Frederick Bernard Doering, Her special licence that I, the
said Frederick Bernard Doring, my executors, administrators, and assigns, or
such others as I, the said Frederick Bernard Doering, my executors, adminis-
trators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "AN IMPROVEMENT IN LEVELS AND OTHER INSTRUMENTS
REQUIRING NICE ADJUSTMENT," upon the condition (amongst others) that I, the
said Frederick Bernard Doering, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Frederick Bernard Doering 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 thereof,reference being had to the Drawing here-
unto annexed, that is to say:
My Invention refers to means of readily and nicely adjusting levels and
other instruments. My Invention consists in supporting the instrument upon
a universal joint with vertical arcs capable of being clamped to one another
and to the frame so as to admit when unclamped of ready adjustment by hand
and when clamped of perfect adjustment by tangent screws.
The accom-
panying Drawing represents a level fitted with my means for readily and
nicely adjusting the same. a, a is the level, it is supported upon a universal
joint b,b, with vertical arcs c,c,capable of being clamped to one another and

page_text: to the frame as before stated; d, d are tangent screws by which perfect
adjustment is obtained when the vertical arcs are clamped,one of the arcs b,b,
may be divided with degrees for measuring vertical angles.
And having now described the nature of my said Invention and in what
manner the same is to be performed, I declare that I claim constructing levels
and other instruments requiringnice adjustment with the means herein-before
described and represented in the accompanying Drawing of readily and nicely
adjusting the same.
In witness whereof, I, the said Frederick Bernard Doring, have hereunto
set my hand and seal, this Twenty-second day of May, One thousand
eight hundred and sixty-five.
F. B. DOERING. (L.B.)