Improvements in Electric Light Fittings.
Year: 1894

page_text: Date of Application, 9th Jan., 1894
Complete Specification Left, 4th Oct., 1894-Accepted, 10th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Electric Light Fittings.
We, CHARLES SPENCER NORTHCOTE, of 29, Princess Street, Manchester,
and JOHN BENJAMIN VERITY, of Plume Works, Aston, Warwickshire, Electrical
Engineers, do hereby declare the nature of this invention to be as follows:-
This invention takes the form of the herein described improvement in or connected
with electric light fittings, & consists of an improved method of attaching or
detaching two or more lamps to or from an existing pendant. In an ordinary
pendant, where more than one light is fixed under a glass shade with small opening
at top, it is impossible to take off the shade for cleaning purposes without having
to break the connection of the wires supplying current to the lamps. This defect
it is the object of our invention to overcome, & this we accomplish as follows:-
In carrying out our invention, we use a body of any suitable shape, provided
with any convenient number of nipples to carry the ordinary lamp holders, &
provided at the top with a plug piece, made in a similar way to the base of an
ordinary incandescent lamp, supplied with contact plates to fit any ordinary lamp
holder. Inside the said body we provide terminals in connection with the contact
plates, to which are attached one end of the supplying wires, the other end being
attached to the lamp holders at the bottom of the body. By this means we are
able to instantly attach a body with 2 or more lamps to a pendant formerly
arranged for 1 lamp only. We are also able instantly to detach the group of 2 or
more lamps, to enable the large shade which is generally used on pendants of this
description to be removed for cleaning purposes, or in the case of cluster fittings to
remove them entirely when necessary or advisable.
Dated this 6th day of January 1894.
CHARLES SPENCER NORTHCOTE.
JOHN BENJAMIN VERITY.
COMPLETE SPECIFICATION.
Improvements in Electric Light Fittings.
We, CHARLES SPENCER NORTHCOTE, of 29, Princess Street, Manchester, and
JOHN BENJAMIN VERITY, of Plume Works, Aston, Warwickshire, 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 takes the form of the herein described improve:nent in or connected
with electric light fittings & consists of an improved method of attaching or detaching
two or more lamps to or from an existing pendant. In an ordinary pendant where
more than one light is fixed under a glass shade with a small opening at top it is
impossible to take off the shades for cleaning purposes without having to break the
connection of the wires supplying current to the lamps. This defect it is the
object of our invention to overcome and this we accomplish as follows:-
In carrying out our invention we use a body of any suitable shape provided with
any convenient number of nipples to carry the ordinary lampholders & provided at
the top with a plug piece made in a similar way to the base of an ordinary
incandescent lamp, supplied with contact plates to fit any ordinary lampholder.
ED 017

page_text: Inside the said body we provide terminals in connection with the contact plates, to
which are attached one end of the supplying wires, the other end being
attached to the lampholders at the bottom of the body. By this means
we are enabled to instantly attach a body with 2 or more lamps to a pendant
formerly arranged for one lamp only. We are also able instantly to detach a group
of two or more lamps to enable the large shade which is generally used on pendants
of this description to be removed for cleaning purposes, or in the case of cluster
fittings, to remove them entirely when necessary or advisable.
We will describe our invention by referring to the accompanying drawings on
which
Fig. 1 is a side elevation and Fig. 2 is a plan of a detachable body constructed
according to our invention.
Fig. 3 is a side elevation & section and Fig. 4 a plan of another form of our
invention, the body being entirely covered in and being provided with a fly ring or
union to allow access to the interior.
Fig. 5 is a side elevation and section of a detachable body or cluster of fittings
suitable for use with a lampholder fitted direct on to ceiling or other position.
Fig. 6 is a side elevation and section of a ceiling plate arranged according to
our invention to carry an electrolier or other electric fitting: Fig. 7 is a plan of
the same.
Fig. 8 is a side elevation & section of the plug piece to suit Figs. 6 & 7: Fig. 9
is a plan of the said plug piece.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawing s
A is the plug piece fitted to the top of the detachable body. B B and B B₁ are
the pins which fit into the bayonet catch C of lampholder or fixing plate D. E E
are the contact plates which complete the circuit when placed against the contact
plungers F in lampholder D. G is fibre, plaster, or other insulating material.
H H are the contacts or terminals attached to contact plates E E, and provided
with binding screws for the wires J J, which are led through the nipples K K.
Lis the body or ball. M is the fly ring or union.
Having now particularly described & 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) The method of attaching to an electric lampholder a body or ball to which
any number of lampholders may be attached substantially as described.
(2) The combination of a body or ball to which any number of lampholders may
be attached with a plug piece similar to the base of an electric lamp so arranged
that it may be instantly attached to or detached from an electric lampholder.
(3) The method of attaching electric light fittings, such as electroliers, pendants,
brackets, standards, switches, and the like, by means of a bayonet joint in
combination with spring contacts substantially as described.
Dated this 4th day of October 1894.
CHARLES SPENCER NORTHCOTE.
JOHN BENJAMIN VERITY.