Improvements in or relating to Galvanometers."
Year: 1897

page_text: 66
Improvements in or relating to Galvanometers."
I, FREDERICK BROWN, of Highgate Road, Walsall, in the County of Stafford,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in or relating to galvanometers, and has
distinct reference to the enclosing casing or box cover wherein the said instrument
or instruments is or are located.
In describing the invention in connection with a galvanometer belonging to the
vertical class, either for measuring volts, ampères, or the like, the instrument is
fixedly connected to and carried by a metalic box-like casing of any suitable shape,
consisting of an enclosed back, sides, and top, but open at its front and bottom.
Upon the top of this box casing are fixedly connected the terminals for the
conducting wires, the same being in electrical communication with the enclosed
instrument, but insulated from the casing. This box-like casing is designed to be
connected to a carrier part consisting of a horizontal base with projecting foot parts,
having rigidly connected at its front part an upwardly directed wall, open for
a part of its length; the same to constitute the enclosing front to the box casing,
whilst the base as aforesaid, forms a closure to the bottom of the same. The
vertical member of this right angled carrier part is robated on its inner side to
accomodate a square of glass to cover up the open part, as aforesaid, and constitute
a glazed front to the indexed portion of the instrument.
The box casing is connected to the carrier part by the simple provision of two
screwed pins passing through the base of the latter part and into the former one.
A right to construct the casing in the manner described of any shape is reserved
without departing from the invention.
"Improvements in or relating to Galvanometers."
I, FREDERICK BROWN, of Highgate Road, Walsall in the County of Stafford, Electrical
Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by "
the following statement :-
Thi
inventine Holatos
to
improvamento in
or
relating to calvanometers, or

page_text: .
instruments for measuring the strengths of electric currents, and has distinct
reference to the casings or covers in which the said instruments are located.
The invention is designed to construct such a casing in a manner which will allow
of easy access to the interior, as well as to simplify the number of parts of which it is
com posed and reduce its cost of manufacture.
In the accompanying sheet of drawings the invention is shown applied to a
galvanometer, belonging to the vertical class whose casing is of a rectangular figure.
Fig 1 represents a front elevation of the said instrument and its casing,
Fig 2 a transverse vertical section of Fig 1 but with the actual instrument in
elevation, Fig 3 a like section as Fig 2 but with the casing opened and the parts
separated, Fig 4 an elevation of the main body of the casing and instrument as
shown on the left hand. of Fig 3, and Fig 5 an inside elevation of the combined
front and bottom of the casing as shown on the right hand in Fig 3. In these said
Figs which illustrate an instrument for measuring volts the said instrument a is
connected to and carried within the hollow interior a² of a box-like casing c, which
forms the body of the enclosure. This said casing c, which may be constructed of
any suitable material, consists of a closed-in back c², closed-in sides c³ and closed-
in top c, its front and bottom as, as, being left open. Upon the top of this box-
like casing are fixedly connected the terminals m, m², for the conducting wires,
the same being in electrical communication with the enclosed instrument but
insulated from the casing.
This box like casing body c is designed to be connected to and to rest upon a
carrier part d consisting of a horizontal base d² having foot flanges d³ and a vertical
plate d disposed at its front end, the said plate being open at ds for a part of its
length; the combined parts to constitute the front and base to the box like casing
body and to form a closure thereto. The vertical member d of the right angled
carrier part is rabbetted upon its inner side at de or formed with a boundary
beading, to accomodate a square of transparent glass or other suitable material g
which closes the open part d³ and constitutes a transparent front to the indexed
portion g² of the instrument.
The box like casing c is connected to the carrier part d by screw pins d' (one only
of which is shown) which pass through the base of the carrier part into the metal of
the side walls.
The instrument is connected to the body of the casing by screw pins h so that
when the combined rigid front and base are removed the said instrument is not in
any way interfered with.
A right to construct the casing of any suitable shape upon the lines laid down is
reserved so long as the simplification of construction set forth is in evidence.
It is obvious that this invention can be applied to instruments other than for
measuring electric volts, it being only necessary to fit a different instrument to the
casing which forms the subject matter of this invention.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
First. Constructing the enclosing casing of a galvanometer or voltmeter in two
parts, the one consisting of a hollow box-like body open only at its front and base
and within which is located and carried the actual instrument and all its parts, and
the other part consisting of a right angled standard comprising a base and a front,
adapted to close the open parts of the box-like body, as aforesaid, substantially as
described.
Second. In the enclosing casing of a galvanometer or volt meter, the combination
of a hollow box-like body c² opens at its front and bottom, a measuring instrument a
attached to and carried within the said hollow body, a right angled and removable
pillar part d constituting the front and base to the casing and having an open part d
and a rabbetted edge or bead d³, and a square of transparent material g to fit

page_text: loosely within the limits of the rabbetted edge as aforesaid and to close transparently
the opening d³ within the right angled part d, substantially as set forth.
1007
A
W. P. THOMPSON & Co.
11, Burlington Chambers, New Street, Birmingham.
Also at Liverpool London & Manchester.
Agents for Applicant.
W. P. THOMPSON & Co.
11, Burlington Chambers, New Street, Birmingham.
Also at Liverpool London & Manchester.
Agents for Applicant.