An Improved Ceiling Rose for Suspending Electric Pendent Lamps.
Year: 1894

page_text: Date of Application, 26th Apr., 1894
Complete Specification Left, 26th Jan., 1895-Accepted, 2nd Mar., 1895
PROVISIONAL SPECIFICATION.
An Improved Ceiling Rose for Suspending Electric Pendent
Lamps.
We, FRANCIS WILLIAM BALL and JOHN HUGH WINTER, both of 3, Unity
Street, Saint Augustines, Bristol, Electrical Engineers, do hereby declare the
nature of this invention to be as follows:-
This invention relates to ceiling roses having detachable contact plates. In the
improved rose in which this invention consists the contact plates are attached to a
tongue provided on the detachable part of the rose. The plates are so shaped that
when attached to the tongue aforesaid a dove-tailed block is thereby formed having
an inclined contact plate on each side.
A dove-tailed socket having a plate at cach side is provided in the base of the
rose, and into this socket the tongue with the contact plates fits.
The weight of the pendant lamp, lamp bittings and the leads is borne by the
detachable part of the rose, and the arrangement is such that the contact is
improved as the weight increases.
The conductors are connected in a usual manner.
Dated this 24th day of April 1894.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent..
COMPLETE SPECIFICATION.
An Improved Ceiling Rose for Suspending Electric Pendent
Lamps.
We, FRANCIS WILLIAM BALL and JOHN HUGH WINTER, both of 3, Unity
Street, Saint Augustines, Bristol, 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 of the kind in which the contact plates of
the detachable portion are carried upon a piece of porcelain or other suitable
insulating material made separately from the base of the rose and readily attachable
thereto and detachable therefrom.
According to this invention the contact plates of, the said separate and separable
piece are arranged one on each side of a tongue constituting a part of the said
detachable piece. The plates with the tongue between them form a dovetailed
block which fits into a correspondingly shaped recess or socket provided on the
base of the rose. The contact plates of the base are arranged one at each side of
the said recess or socket.
The detachable piece carries the binding screws for the lamp or pendant leads,
aud may also carry the safety fuse or fuses.
The pendant lamp and lamp fittings are connected by means of the leads to the
terminal plates ou the detachable piece, and the contact which is made between the
plates on the detachable piece and the plates on the base, by sliding the dovetailed

page_text: block horizontally into the recess in the base, is improved by the weight of the
pendant lamp and fittings.
In the accompanying sheet of illustrative drawings
Fig. 1 represents a view of one side of the base of a ceiling rose made in
accordance with this invention.
Fig. 2 is a plan of the base as seen from the underside.
Fig. 3 is a view of one side of the detachable contact piece carrying the usual
safety fuse a and the binding screws for attachment of the lamp leads c.
Fig. 4 is a view of the upper face of the contact piece, and-
Fig. 5 is a view of the under face.
The detachable contact piece, which is of porcelain or other suitable insulating
material, is made with a dovetailed tongue d up the sides of which extend the
contact plates e fixed to the disc f. The leads care conducted through apertures f¹
into the throat f' and thus relieve the binding screws 6 of part of the weight of the
lamp and lamp fittings.
The method of wiring described and shown does not, however, constitute a part
of this invention. It may be otherwise arranged.
In the base of the rose is a dovetailed socket 7 fitted at each side with plates / to
which the current is conducted by the leads and screws h².
When the tongue d with the contact plates e is slid horizontally into the groovey,
as seen at Fig. 6, the plates e of the detachable piece are in contact with the
plates of the base. The contact is improved as the weight of the pendant acting
on the contact piece is increased.
The weight of the pendant cap be taken entirely off the terminals on the
detachable part. Good contact can also be obtained by means of a spring suitably
insulated and fixed to the base and acting downwardly on the upper end of the
tongue d. Or the plates e may be arranged as springs tending to open against the
plates h.
When the contact piece has been slid into its place in the base, the cover,
of which a view is shown at Fig. 7, and which is of a usual kind, is screwed ou to
the base.
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
.clain is :-
In a ceiling rose for pendant electric lamps, a detachable contact piece consisting
of a tongue such as d, of porcelain or other suitable insulating material, having at
each side a contact plate e which plates e, and preferably also the tongue d, are
shaped and arranged as to constitute a dovetailed block fitted to slide horizontally
into a correspondingly shaped groove g in the base of the rose; the groove being
lined at each side by plates h so that the latter and the plates e of the contact piece
are in contact when the contact piece is slid into its place, substantially as
herein before described with reference to the accompanying sheet of illustrative
.drawings.
Dated this 25th day of January 1895.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.