Improvements in Incandescent Electric Lamp Holders, Ceiling Roses, and other like Fittings.
Year: 1891

page_text: Date of Application, 24th Apr., 1891
Complete Specification Left, 21st Jan., 1892-Accepted. 5th Mar.. 1892
PROVISIONAL SPECIFICATION.
Improvements in Incandescent Electric Lamp Holders, Ceiling
Roses, and other like Fittings.
FREDERICK HENRY ROYCE Electrician Cooke Street Hulme Manchester do
hereby declare the nature of this invention to be as follows:-
On the wire or wires entering electric fittings such as incandescent lamp holders,
ceiling roses, connection sockets &c. I cause them to be tightly clamped between
a washer or cover & inner portion of the fitting with the object of taking any
strain put upon such wires, off the terminal connections & I preferably effect this
by first passing the wire or wires through a hole in the cover or washer & then
bending them at right angles so that they lie upon the face of an inner part of
the fitting the cover or washer then being screwed up or tightened by any means
effectually clamps them & holds them rigidly in position.
:
Dated this 22nd day of Anril 1891
COMPLETE SPECIFICATION.
Improvements in Incandescent Electric Lamp Holders, Ceiling
Roses, and other like Fittings.
FREDERICK HENRY ROYCE Electrician Cooke Street Hulme Manchester 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:-
The improvements which form the subject of this invention relate to an
improved cord or wire grip in electrical & other like fittings and the object of
this invention is to ensure the wire or wires forming the cord being securely fastened
to prevent them being withdrawn from the fitting until desired. In order more
clearly to describe my invention I have annexed hereunto a sheet of drawings.
Figure 1. is a section of an incandescent electric lamp holder wherein E is the
usual metal tube & D the metal nut.
B is a loose insulating piece and C the insulating body of the lamp holder
carrying the usual contact springs and connecting screws for the wires.
A is the flexible cord which it will be seen is led through B and its two
wires carried to the connecting plates on C.
On screwing up the nut D it will be seen the wires are firmly clamped between B
& C preventing them being withdrawn.
Figure 2 is a section of a ceiling rose wherein B is the usual cover and C the
usual base, with a raised table having radial grooves from the centre of its face as
shewn.
The usual connecting plates are arranged round the side of the table, two
appearing on the drawing.
D is a loose washer, preferably of insulating material.
A is the flexible cord led through B & D & its two wires carried to the con-
necting plates on C.
On screwing up B it will be seen the wires are firmly clamped between D & C,
the radial grooves assisting to secure the wires firmly, so effectually preventing
them being withdrawn.

page_text: Having now particularly described the nature of my said invention & in what
manner the same is to be performed I declare that what I claim is,
In an incandescent electric lamp holder, ceiling rose, or other like fitting, the
use of a cord grip which on the cord entering the fitting & its two wires parting
to their connection plates, clamps them firmly in position, substantially as herein
before described.
Dated this Nineteenth day of January 1892.
FREDERICK HENRY ROYCE.