Improvements in the Manufacture of Ceiling Roses, Switches, Cut outs, or other similar Electrical Fittings.
Year: 1888

page_text: Date of Application, 5th Dec., 1888
Complete Specification Left, 27th June, 1889-Accepted, 27th July. 1889
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Ceiling Roses, Switches, Cut
outs, or other similar Electrical Fittings.
I WILSON HENRY STURGE, of 17 Frederick Road, Edgbaston, Birmingham, in
the county of Warwick Electrical Engineer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in the construction and combination of
parts constituting ceiling roses, cut outs, or fuse connections, wall connections,
switches, or other articles for similar purposes, in connection with electrical fittings,
and its object is to provide that the earthenware base, (to which are attached the
terminal plates.) is combined with or mounted in a metallic ring or setting,
which said metallic ring or setting affords facility for a metallic screw thread or
other suitable metallic fastening, which takes into a corresponding metallic screw
thread or other part of such fastening formed upon or in the cap or front of such
rose or other fitting.
I make a circular ring or setting, the internal shape of which is made to hold
and retain the earthenware base, preferably by rolling in the outer edge of the
metal, or by equivalent method, by which the said two parts are firmly connected
together. Upon its exterior is formed a screw thread for a part of its length, the
remaining part being an enlarged collar or shoulder. I now connect this com-
bined piece to a metal base plate, by passing such metal plate on to the screwed
part of the mount, up to and against the shoulder.
The earthenware cap has formed upon it, a metallic screw thread, which takes
into or upon the screw thread aforesaid. This would be formed, by mounting the
said earthenware cap in a metallic setting, upon which the said screw
is cut.
'
thread
In some cases I may form the metallic ring or setting surrounding the earthen-
ware base, in one with the metal base plate. To effect this, I cast or stamp a
metallic plate of suitable shape for attachment to the ceiling, or other fixture, and
provide in its centre a rebated or other suitable shaped recess, to receive and
retain the earthenware base. Upon the front side of such metallic base plate, I
raise the exterior of this recess, in a flange form, whereon is formed the screw
thread.
The earthenware base would be secured in this recess, after the manner afore-
said.
Instead of the screw thread method of fastening the cap to the metallic. setting
or ring, I may in the case of "switches" or "cut outs" use a metallic cap. and
attach it by means of pins or studs upon the one part, taking into a bayonet
shaped slot or slots upon the other part, or, such parts may be connected by
means of ordinary screw pins.
By any or all of these means, the electrical connections &c., are made upon a proper
non conducting and incombustible material; while at the same time, a screw, or other
equivalent connection of the cap to the metal plate or setting is provided, which, is
much more substantial, mechanical, and interchangeable in its character, and construc-
tion than in those of present make.
Dated this 4th day of December 1888.
CHARLES T. POWELL,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Ceiling Roses, Switches, Cut
outs, or other similar Electrical Fittings.
I WILSON HENRY STURGE, of 17 Frederick Road, Edgbaston, Birmingham, in
the county of Warwick 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 invention relates to improvements in the construction and combination of parts
constituting ceiling roses, cut-outs, wall connections, and switches, which are mounted
on porcelain, slate or other incombustible bases.
Its object is to provide an improved mechanical method of attaching the cap of
porcelain, glass, or other vitreous substance, to the base of such fittings.
To effect this, I make a metallic circular ring or setting, the interior of which is
made to fit the earthenware base, on which the terminal plates are fixed, and which is
secured by the edge of the setting being rolled over the earthenware.
Upon the exterior of this ring is formed a screw thread. 1 now connect this com-
bined piece to a metal base plate, by passing such metal plate on to the screwed part
of the mount, up to and against the shoulder. This metal base is attached to the
ceiling or other fixture by means of screws passing through holes cut in the base,
which holes are countersunk, so that the beads of such screws draw up flush with the
surrounding metal.
To attach the earthenware cap to the rest of the fitting, I form a ring of metal of
U section. This ring is screwed on the inside with a female thread, which takes into
the male thread, which is attached to the earthenware base.
The earthenware cap is made of such a shape as to drop into this ring, then the
outer edge or ring is rolled over the rim of the cap, thus firmly securing it in its
place.
In some cases I may form the metallic ring or setting, surrounding the earthenware
base, in one with the metal base plate. To effect this, I cut or stamp a metallic plate
of suitable shape for attachment to the ceiling or other fixture, and provide in its
centre, a suitable shaped recess to receive and retain the earthenware base. Upon the
front side of such metallic base plate, I raise a flange whereon is formed the screw
thread.
The earthenware base would be secured in this recess after the manner hereinafter
explained.
I will now describe this my invention more particularly, and how it may be
performed, having reference to the accompanying illustrative sheet of drawings, upon
which are figures and letters of reference, similar letters referring throughout the
several views to the same thing or part, and upon which :-
Fig. 1, shews in section, its application to one form of ceiling rose, having a cast
metal base, Fig. 2, being a side view of the pulley shewn in Fig. 1. In this fitting the
metal base serves also as a firm support for the pulley frame.
Fig. 3, is a sectional view of its application where the base plate is made of stamped
metal.
Fig. 4, is a detached sectional view of the stamped metallic plate, showing the slitted
projections prepared to receive the earthenware base, before being bent over the
latter.
Fig. 5, is a plan view of Fig. 3.
In reference to Fig. 1, I make a circular ring or setting a, the interior of which is
made to hold and retain the earthenware base b, by forming a shoulder at c, and by
further rolling over the outer edge of the mount at f, upon the said base. Upon the
exterior of this mount is formed a screwthread. The cast metal base g, is prepared,
with a central screwed hole, into which the aforesaid base mount a, takes.
As before intimated, Figs. 3, 4, & 5, illustrate this my invention, made from sheet
or stamped metal, and in which the metallic ring or setting surrounding the earthen-
ware base, is in one therewith.

page_text: I cut or stamp a metallic plate k, of suitable shape for attachment to the ceiling or
other fixture, and "draw through" or dish its central part to form the recess or flange 1,
upon the outside of which is formed the screwthread as before.
I now make three slits or incisions of the metal at m, m, m, then by suitable tools,
push such slitted portions or ears of metal n, n, n, to a right angled position to that of
the base, as seen in Fig. 4, preparatory to its receiving the earthenware base b¹. This
said base b¹, is provided with an outstanding rim or collar o, over which, when it is
passed into the recess, the said ears n, n, n, are bent, as seen in Figs. 3, & 5, by
which means the said base 61, is firmly secured in position.
Although this my invention is illustrated upon the drawings as only applied to
ceiling roses, yet it will be readily understood that it is applicable in a similar manner
to switches and cut outs.
By these means the electrical connections are made upon a proper non-conducting
and incombustible material, and at the same time the construction and arrangements
afford a much more substantial, mechanical, and interchangeable means of connection,
between the cap and the base plate, than is at present in use.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. In certain electrical fittings such as " ceiling roses,"
," "switches," or "cut outs,"
the rigidly mounting of the earthenware base b, in a metallic setting, which said
setting is provided with a screw-thread, substantially as hereindescribed and illus-
trated in Fig. 1, and for the purpose specified.
23 £
2nd. In certain electrical fittings such as " ceiling roses,"
"
switches," or cut outs,"
the rigidly mounting of the earthenware cap h, in a metallic setting, which said
setting is provided with a screw thread corresponding to that upon the earthenware
base mount, substantially as hereindescribed and illustrated in Figs. 1, and 3, and for
the purpose specified.
"
3rd. In electrical "ceiling roses," 'switches," or cut outs," the combination of
the cap and the metal base plate, each provided with an internal screwthread, with a
metallic mount or setting in which is secured the earthenware base b, substantially as
shewn in Fig. 1, and for the purposes stated.
4th. In electrical "ceiling roses,"
," "switches," or "cut outs," the modified com-
bination of the cap provided with an internal screw-thread, with a metallic base plate,
in which is formed a recess l, to receive the earthenware base b¹, and further provided
with slitted ears m, m, m, substantially as shown in Figs. 3, 4, & 5, and for the
purposes specified.
Dated this 26th day of June 1889.
June Lo89.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.