Improvements in Ceiling Roses for Electrical Purposes.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Ceiling Roses for Electrical Purposes.
I, WILLIAM PAUL THEERMANN 12 Corporation Street Manchester in the County
of Lancashire Electrical Engineer, do hereby declare the nature of this invention
to be as follows:-
This improvement relates to Ceiling Roses for Electrical purposes and the object
of my invention is to insure a higher insulation between the several connections
especially where high voltage of current is used and to prevent the fuse coming in
contact with the Flexible cord which is very detrimental; in case the fuse blows
the flash or spark or hot metal igniting the rubber, cotton or silk covering of the
Flexible cord.
To effect these improvements I construct a Cieling Rose in the following
manner. I use a Cieling Rose with porcelain base and cover similar in size and
shape to those now in use; on the top surface of the base of the said Cieling Roses
are mounted three suitable terminal plates with two connecting screws or
terminals for each plate (two for the Cables or wires, two for the Flexible Cord
and two for the fuse connections). On the top surface of said Cieling Rose is also
fixed or moulded a porcelain projection or partition with suitable openings through
which passes the two ends of the Flexible Cord, and which is for the purpose of
taking the strain off the Flexible cord connections.
Out of the screwed portion of the said base (which the cover screws on) I cut
two L shaped notches or recesses at suitable distances apart, and a small hole
through the said base extending from one notch or recess to the other. Two of
the said terminal plates are bent at a suitable shape so that one end of each of the
two said plates with their terminal screws lay over or fit against one side of each
of the two notches or recesses.
The fuse wire is passed through the said small hole in the base and connected to
the said terminal screws. By this means the top surface of the said Cicling Rose
is left clear for the Cable and Flexible cord connections, and when the fuse blows
it is impossible for the flash or spark or hot metal to come in contact with the
Flexible Cord and therefore a higher and safer insulation between the several
parts is effected.
By this construction also the first cost of manufacturing the said Cieling Rose
is greatly reduced.

page_text: Improvements in Ceiling Roses for Electrical Purposes.
I, WILLIAM PAUL THEERMANN of 12 Corporation Street, Manchester in the
County of Lancashire, 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 improvement relates to ceiling roses and other like articles for electrical
purposes and the object of my invention is to insure a higher insulation between
the several connections, especially when high voltage of current is used, and to
prevent the fuse coming in contact with the flexible cord which is highly dangerous
in case the fuze "blows" from the fact that the flash or spark or hot metal is very
apt to ignite the rubber, cotton or silk covering of the flexible cord.
In carrying out these improvements I prefer to employ a ceiling rose with a
porcelain base and cover, similar in size and shape to those now in common use,
and upon the top surface of the base of the said ceiling rose I mount three suitable
terminal plates each having two connecting screws or terminals the said terminals
being so arranged as to provide two for the cables or lead wires, two for the
flexible cord, and two for the fuse connections.
On the top surface of said ceiling rose is fixed or moulded a porcelain boss pro-
jection or partition with suitable openings through which passes the two ends of
the flexible cords, and which is for the purpose of taking the strain off the flexible
cord connections.
Out of the edges of the said base which are screwed to receive the cover I cut
two shaped or angular notches or recesses arranged at suitable distances apart
but connected with one another by a small hole or thoroughfare passage made
from the one recess to the other and wherethrough the fuze runs as hereinafter
described, the said recess being provided to facilitate the fitting of the fuze
terminal plates conveniently to the base of the rose.
Two of these fuze terminal plates are bent at a suitable shape so that one end
of each with their terminal screws lays over or fits against one side of each of the
two notches or recesses, and then the fuze wire is. passed through the said small
hole in the base and is connected at either end to the said terminal screws.
By this means the top surface of the said ceiling rose is left clear for the cable
and flexible cord connections, and when the fuze "blows" it is impossible for the
flash or spark or hot metal to come in contact with the flexible cord, and therefore
a higher and safer insulation between the several parts is effected
Referring to the accompanying drawings.
Figure 1 is a plan of ceiling nose provided with my improvements with cover
removed.
Figure 2 is a vertical section of Figure 1 on the dotted line x, x.
.
Figure 3 is a horizontal section upon the dotted line, Figure 2 and Figure 4
is a similar section upon the dotted line 2.
Figure 5 is a plan of a ceiling rose with cover removed, and constructed accord-
ing to a slightly modified form of my invention.
a is the base of ceiling rose and the cover, whilst c, d, e, are the terminal plates
with their respective connecting screws f, g, h, i, k, 17. On the surface of base a is
formed a projection or hollow boss with transverse holes or openings n, n, where-
through passes the flexible cord, which is connected to terminals f and h, whilst
the lead wire or cables passing through the openings o, o, in the base, are respec-
tively connected to the terminals g, i.
In the edges of the base a are cut two V-shaped or angular notches or

page_text: recesses r, s, connected together by a small hole or thoroughfare passage t, extend-
ing from one recess to the other and through which the fuze (not shown) passes and
is connected by the terminal screws 1k, to the terminal plates d, e, which are
respectively bent over one side of each of the recesses r, s.
By passing the flexible cord through the openings n, n, all strain is taken off
the terminals f, h, and should the fuze "blows" at any time in the opening tit
is impossible for the sparks or hot metal to come in contact with and ignite the
coverings of, or otherwise damage the flexible cord.
The modification of said ceiling rose illustrated in Figure 5 differs from the
before described arrangement only in respect of the positions of the recess », s, and
the fuze-wire passage t. The whole of the parts are marked with the same letters
of reference as Figures 1 to 4.
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. In ceiling roses for electrical purposes, directing the fuze through a
passage or through a cross thoroughfare passage in the base, whereby the said
fuze is isolated from the flexible cords and cognate fittings of the rose, and a
higher insulation is effected between the several connections, substantially as
herein described and set forth.
Secondly. In ceiling roses for electrical purposes directing the fuze through a
thoroughfare passage in the base, terminated at each end by a gap or recess,
substantially as and for the purpose as described and set forth.
Thirdly. In ceiling roses for electrical purposes, the combination with the
recesses at the ends of the thoroughfare fuze passage, of terminal plates such as d, e,
and terminals, such as 1, k, substantially as described and set forth.
Fourthly. The improvements in ceiling roses and analogous fittings for electrical
purposes, and in combination and arrangement of the several parts, substantially
as described and set forth.
Dated this 8th day of Santamar 1807
WILLIAM PAUL THEERMANN.
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant.