Improvements in Ceiling Roses and other similar Electric Fittings.
Year: 1895

page_text: Date of Application, 23rd Jan., 1895
Complete Specification Left, 23rd Oct., 1895-Accepted, 23rd Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in Ceiling Roses and other similar Electric Fittings.
We, JOHN GLYNN WILLIAMS of 686 Rochdale Road, and HENRY MOSTYN
DARRAH of Miller Street both of Manchester in the County of Lancaster,
Electrical Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to ceiling roses and other similar electric fittings and its
object is to provide means whereby the lamp wires may be connected to the covers.
of such fittings instead of to their bases as has hitherto been usual.
Apart from the electric connections and contacts the fitting consists of an
insulating base and cover, both being preferably constructed of porcelain or glazed
stoneware. On the base there are fixed contacts connected with the main, and
within the cover there are fixed two corresponding contacts and also if desired, a
fuse. The respective contacts are so constructed and relatively arranged that
when the cover is placed upon the base the cover contacts comes into connection
with the base contacts. The contacts in the cover are connected with the external
conducting wires which may be the flexible cord of a suspended lamp in the case
of a ceiling rose, or the wires of a bracket in the case of a wall patera.
The cover and the base may be secured together removably by means of a
bayonet joint, screw threads, clips, springs, screws or the like devices. If a
bayonet or screw joint be used, we may employ in combination therewith a spring
or other detent for the purpose of preventing the cover slipping back and thus
opening the circuit.
Dated this 22nd day of January A.D. 1895
WILLIAM E. HEYS,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Ceiling Roses and other similar Electric Fittings.
We, JOHN GLYNN WILLIAMS of 686 Rochdale Road, and HENRY MOSTYN
DARRAH, of Miller Street, both of Manchester in the County of Lancaster,.
Electrical Engineers, 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 ceiling roses and other similar electric fittings and its
object is to provide means whereby the lamp wires or other external conductors
may be connected to the covers of such fittings instead of to their bases as has
hitherto been usual.
:
We will describe our improvements as applied to a ceiling rose, with reference
to the accompanying drawings in the various figures of which similar parts are
denoted by similar letters of reference.
Figure 1 represents a plan of the base and
Figure 2, a plan of the cover.
Figure 3 shews a vertical section taken through the base and the cover occupying

page_text: Apart from the electric connections and contacts, each fitting constructed
according to this invention consists of a base B, and a cover C, both being pre-
ferably constructed of porcelain or glazed stone-ware. On the base, there are
fixed the terminal contact plates T T¹, respectively connected with the main wires,
and in the cover there are fixed two corresponding terminal contacts t t', and also,
if desired, a fuse F. The respective contacts T. T¹t t¹, are so constructed and
relatively arranged that when the cover is placed in position, upon the base, the
cover contacts come into electrical connection with the base contacts. As shewn
by the drawings, the contacts in the cover are spring contacts of ordinary
construction, but we do not limit ourselves to these, and they, or their equivalents
may alternatively be fixed upon the base instead of upon the cover, in which case
the contacts T T would change places with the contacts t t'. The terminal
contacts in the cover are connected with the external conductors e e¹, which may
be the flexible cord of a suspended lamp in the case of a ceiling rose, or the wires
of a bracket in the case of a wall patera. In the drawings, a flexible cord is
shewn, which, for greater security, may be knotted or passed around a short rod or
the like, within the cover.
It will be evident that the removal of the cover from the base, opens the circuit.
The cover and the base may be secured together removably, by known means
such as by a bayonet joint, screw threads, clips, springs, screws, or the like devices.
If a bayonet or ordinary screw joint be used, we may employ in combination there-
with, a spring or other detent for the purpose of preventing the cover slipping
back and thus opening the circuit. A convenient method of making the joint is to
form corresponding internal and external screw threads in or upon the base and
the cover respectively. Two opposite quadrants ssl of each of these screw threads
are cut away, as indicated by the drawings. In fitting the two parts together, the
cut away part of the cover screw is passed over the screwed part of the base, and
the cover is then partly rotated so as to bring the internal and external screw
threads into engagement.
We have described our improvements only as applied to a ceiling rose, but it
will be understood that they may be applied in an analogous manner to other
similar electric fittings.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
-
1. An electric fitting such as a ceiling rose, constructed and arranged sub-
stantially as herein before described with reference to the accompanying drawings.
2. In a ceiling rose or similar electric fitting, the construction arrangement and
combination with a base having fixed electric contacts connected with the main
wires, of a cover having corresponding contacts which come into connection with
the base contacts when the cover is in place, the cover contacts being connected
with the external circuit, substantially as herein before described and as illustrated
by the accompanying drawings.
Dated this 22nd dev of October Å D 1805