Year: 1887

page_text: Date of Application, 4th May, 188?
Complete Left, 4th Jan., 1888
Complete Accepted, 13th Apr., 1888
We, EDWARD MANVILLE, and WILLIAM LEONARD MADGEN, both of 36 Albert
Embankment, Lambeth, Managing Directors of the United Electrical Engineering
Company, Limited, do hereby declare the nature of this invention to be as follows:-
This invention relates to that class of electric lamp holders in which a cap or base
is used capable of connection to a bracket or similar fitting, and provided with
arrangements for holding the ends of the electric wires, and conveying the current by
means of springs terminating with hooks to engage with the terminals of an uncapped
lamp, or by means of springs suitable for making contact against the bottom of a
capped lamp.
"
32
In one form of our holder we make use of a 'spun," "stamped" or "turned
base of brass or other convenient material, having a thread on one end to engage with
the thread on the bracket or similar fitting, and having in the other end an insulating
disc of well burned pipe clay or other insulating material, moulded so that it has an
opening or openings for the leads to pass through, and being provided with contacts
and terminals made as follows:-Each terminal is made from a screwed rod with a
head at one extremity, which is within the bottom face of the insulating disc, and
where it emerges through the disc, its end is drilled longitudinally or transversely, the
latter opening containing a spring soldered to the bottom of the hole, its upper end
either terminating in a hook to engage with loop on the lamp, or simply left flat to
form a contact when a capped lamp is placed over it. The transverse hole is intended
to take the end of the cable or lead, and it is tightly held in place by a nut running
upon the screwed rod. When considered desirable, a screwed washer forms a plate
or base immediately below the transverse hole, and holds the screwed rod firmly in
place. In another form we use Portland cement, moulded in the same way, to make
the insulating disc. We treat the disc with oil or similar medium to keep damp out,
and fasten them in place by a coating of plaster of Paris, shellac or similar material
upon their sides, applied a moment before they are put in position. The inside of the
base or cap may be chased or grooved to afford a better key to the discs, and after the
latter are in place, the caps may be burnished over so as to permanently secure them. In

page_text: case it is desirable to connect with an uncapped lamp, we use two cross wire loops or
equivalent means attached to a cylinder or band of metal screwed or otherwise
attached to the base piece, and to take lamps already capped, we use a tubular
connecting piece either or both ends having holes corresponding to the pins in the
cap, and to similar pins projecting from the base. On each side of such holes, the
tube is slotted and its lower end turned out, so that it forms a spring lip and allows
the pin to drop into the hole, but immediately closes back and holds it fast. For
facility in unlocking the side adjoining, the hole is pressed to form an inclined plane,
and the tendency to revolve the tube coupled with vertical pressure forces the lip out
and relieves the pins.
If desirable, the well known bayonet joint may be cut upon the tube to engage the
aforesaid pins.
1
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicants.

page_text: Improvements in Holders for Electric Lamps.
We, EDWARD MANVILLE and WILLIAM LEONARD MADGEN, both of 36 Albert
Embankment, Lambeth, Managing Directors of the United Electrical Engineering
Company, Limited, 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 that class of Electric Lamp Holders in which a cap or
base is used capable of connection to a Bracket or other fitting, and provided with
arrangements for holding the ends of the Electric wires and conveying the current
by means of springs terminating with hooks to engage with the terminals of an
uncapped lamp, or, by means of springs suitable for making contact against the
bottom of a capped lamp.
The more fully to explain the nature of our invention reference is made to the
drawings annexed.
3366
In one form of our holder we make use of a "spun stamped" or turned base of
brass or other convenient material shown in Fig. 1 marked A having a thread at one
end to engage with the thread on the fitting see B Fig. 2 and having in the other end
a disc of well burned pipe-clay or similar insulating material (marked C Fig. 2)
moulded so that it has an opening or openings for the leads to pass through and being
provided with contacts & terminals made as follows (see Figs. 3 & 4). Each terminal
is made from a screwed rod with a head at one extremity which is within the bottom
face of the insulating disc and where it emerges through the disc its end is drilled
longitudinally and transversely the former opening containing a spring soldered to
the bottom of the hole its upper end either terminating in a hook (see Fig. 4) to
engage with a loop on the lamp or simply left flat to form a contact (as in Fig. 3)
when a capped lamp is placed over it. The transverse hole is intended to take the end
of the cable or lead and it is tightly held in place by a nut D running upon the
screwed rod. When it is considered desirable a screwed washer forms a plate or base
immediately below the transverse hole and holds the screwed rod firmly in place
(see E Fig. 4). In another form we use portland cement moulded in the same shape
to make the insulating disc. We treat the discs with oil or similar medium to keep
damp out & fasten them in place by a coating of plaster of paris, shellac or similar
material upon their sides applied a moment before they are put into position.
The inside of the bases or caps may be chased or grooved to afford a better key to
the discs and after the latter are in place the edges of the caps may be burnished over
so as to permanently secure the discs.
In case it is desirable to connect with an uncapped lamp we use two cross wire
loops (see F. Fig. 5) or equivalent arrangement attached to a cylinder or band of
metal screwed or otherwise fastened to the base piece and for taking lamps already
capped we use a tubular connecting piece, either or both ends of which have holes in
them placed to engage respectively with pins in a suitable lamp cap & with pins

page_text: projecting from the base of the holder. Figure 6, shows one of these holes the tube
being slit down beyond it on each side; the extreme end of the section between these
slits is turned out to form a curved lip or tongue. In attaching one end of this
tubular connector to the base or a lamp cap to the other end the curved lips or tongues
are passed outwards by the pins and after allowing them to come opposite their
respective holes immediately spring inwards & hold securely.
By forming a slight inclination in the metal immediately beyond the holes in the
connector we find disconnection of the parts can be facilitated.
If desirable the well known bayonet joints may be cut upon the tube to engage
with the aforesaid pins.
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 use of a pipe-clay or portland cement insulating disc in an incandiscent
lamp holder.
(2.) The terminals substantially as discribed.
(3.) The combination of an insulating disc with a terminal as discribed.
(4.) The combination of a brass base and insulating disc and a terminal as discribed
in conjunction with a tubular connection for taking capped lamps.
(5.) The combination of a terminal as discribed a brass base an insulating disc and
a holder for taking uncapped lamps formed by the reciprocal action of the terminal
springs & a spring or springs bearing upon the lamp.
Dated this 4th day of January 1887.