Improvements in Electrical Switch Boards and Fuse Boards.
Year: 1891

page_text: Date of Application, 12th Mar., 1891
Complete Specification Left. 14th Dec. 1891-Accepted. 16th Jan. 1892
PROVISIONAL SPECIFICATION.
Improvements in Electrical Switch Boards and Fuse Boards.
I, WILLIAM WHITE, of 58 Bread Street, in the City of London, Electrical
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to a simple and inexpensive construction of switch
boards and fuse boards for distributing among a number of branch conductors the
electrical current from a main conductor. For this purpose I provide the required
number of switches or cut outs, which may be of any known kind, each having contact
plates or fuse holders mounted on an insulating base and having one of the plates
or holders connected to one of the branch conductors. Through the base of each of
these instruments I drill or form a transverse hole, (which hole may be made at the
time when the base is moulded or formed); and having arranged all the bases on a
board with their holes in line I pass through all these holes a conducting rod,
preferably of copper, which carries the main current that has to be distributed.
In this rod at each place where it crosses beneath a contact plate or fuse holder in
one of the bases there is a transverse hole previously drilled and tapped, into which
hole is screwed from the upper face of the base a screw forming a conducting
connection from the rod to the contact plate of the switch immediately above or
to one of the holders of the safety fuse.
Dated this 12th day of March 1891.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Electrical Switch Boards and Fuse Boards.
I, WILLIAM WHITE, of 58 Bread Street, in the City of London, 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 :-
This invention relates to a simple and inexpensive construction of switch
boards and fuse boards for distributing among a number of branch conductors the
electrical current from a main conductor. For this purpose I provide the required
number of switches or cut outs, which may be of any known kind, each having
contact plates or fuse holders mounted on an insulating base and having one of the
plates or holders connected to one of the branch conductors. Through the base
of each of these instruments I drill or form a transverse hole (which hole may be
made at the time when the base is moulded or formed); and having arranged and
fixed by screws or otherwise all the bases on a board with their holes in line, I pass
through all these holes a conducting rod, preferably of copper, which carries the
main current that has to be distributed. In this rod at each place where it crosses
beneath a contact plate or fuse holder in one of the bases there is a transverse hole
previously drilled and tapped, into which hole is screwed from the upper face of
the base a screw forming a conducting connection from the rod to the contact plate
of the switch immediately above or to one of the holders of the safety fuse.
Fig. 1 of the accompanying drawings is a plan, Fig. 2 is a side view and Fig. 3
is an end view of a triple electrical fuse board according to this invention, and
Fig. 4 is a plan of a double switch board of like construction.
The main conductor A is connected to a rod B of copper or other conducting

page_text: material which is passed through holes in a number of non conducting bases D
(which may be of ceramic material).
The branch conductors C are fixed in sheaths E from each of which projects
upwards a screwed stem fitted with a nut F.
The conducting rod B has screwed into it a number of screwed stems G on each
of which is a nut H. When the board is for safety fuses, as shewn in Figs. 1, 2,
and 3, these fuses K are clamped at their ends under the nuts F and H. In like
manner when the board is for switches, the conducting plates P for the switches are
clamped respectively under the nuts F and H. Although I have shewn in Fig. 1
only three fuses and in Fig. 4 only two switches arranged side by side, obviously
there might be various numbers of these connected and held in the manner
described.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
An electrical fuse or switch board consisting of a number of bases of non-
conducting material arranged side by side having a main conductor passed trans-
versely through holes in all the bases and a branch conductor inserted in an end
hole of each base with suitable clamping screws and nuts to hold the fuses or switch
plates, substantially as described.
Dated this 14th day of December 1891
ABEL & IMRAY,
Agents for the Applicant.