IMPROVEMENTS IN HOLDERS AND FITTINGS FOR ELECTRIC LAMPS
Year: 1887

page_text: Date of Application, 9th Mar., 1887
Complete Left, 8th Dec., 1887
Complete Accepted, 13th Jan., 1888
1 Enwide CooPER WARBURTON, of Eccles, near Manchester in the County of
Lancaster, Electrical Engineer, do hereby declare the nature of said Invention for
IMPROVEMENTS IN HOLDERS AND FITTINGS FOR ELECTRIC LAMPS to be as follows:-
Lancaster, Electrical Engineer, do hereby declare the nature of said Invention for
IMPROVEMENTS IN HOLDERS AND FITTINGS FOR ELECTRIC LAMPS to be as follows :-
My Invention relates to improvements in holders and fittings for electrical incan-
descent or glow lamps.
The
The form of lamp holder now generally employed has spring prongs or curved wires
against and within which the shoulder of the glow lamp bulb is pressed up until the
helical wire connecting springs are caught or disconnected as the case may be.
movements necessary to effect this frequently damage or displace the platinum wire
loops sealed into the glass bulb of such lamps.
The objects of my improvements are to simplify and improve the means for con-
necting and disconnecting the lamp bulbs to or from their holders to obtain greater
steadiness for the lamp when in position and a better contact with the connecting wires
and to prevent undue damage or displacement of the platinum loops during attach-
ment to or removal from their holders.
The improved lamp holder is constructed and arranged substantially as follows: I
bave a tubular or cylindrical box open at the lower end and made say in two pieces,
viz. the body or main portion which is open at the lower end and is closed at the
upper end by a cover attached to the body preferably by means of a bayonet joint and
thumb screws.
On an annular ledge in the box is fitted a disc of wood ebonite or other suitable
insulating material which is secured in position by pins or otherwise and has two
holes drilled vertically through it. These holes are for the reception of two closely
coiled spiral or helical springs of conical form the upper and wider ends of which are
soldered or otherwise secured into holes countersunk in two plates or terminals,
secured by screws to the upper side of the wooden disc. Through the hole in each
plate and down the centre of each conical spiral spring is passed a pin which has a
head at its upper end and terminates in a hook at the other and lower extremity near
which it is soldered to the apex of the conical spring through which it is passed. This
P71

page_text: arrangement admits of a longitudinal or vertical in addition to a latitudinal or hori¯
zontal movement being imparted to the hooks at the lower ends of the pins by simply
pressing or operating the heads at the upper ends.
To attach the lamp bulb to the holder therefore it is only necessary to insert the
end of the bulb into the open end of the holder and then operate the heads of the pins
so as to bring the hooks into the required positions to connect them to the platinum
or other eyelets or loops on the lamp bulb and for the purpose of facilitating observa-
tion during this operation I make say three holes in the side of the holder through
which the movements of the hooks can be readily seen.
The shade fittings for the glow lamp propose to employ are an opaline or other
glass disc below which is placed a truncated globe both shades being secured
between an annular flange on the exterior of the lower end of the holder and a nut
which is screwed on to said holder. The two shades when thus combined forming a
convenient reflective arrangement somewhat resembling the planet Saturn and its
Ring.
In some cases I employ instead of the disc shade a concavo-convex or other suitably
shaped reflector to he attached to the holder as above described and particularly
adapted to take the place of the oil and wick holder in lamps of railway carriages.
In other cases the lamp may be suspended from a bracket similar to the ordinary
form of gas wall bracket by means of a hole in the side of the body or top of the
cover of the holder.

page_text: 1 EDWARD COOPER WARBURTON of Eccles near Manchester in the County of
Lancaster Electrical Engineer, do hereby declare the nature of said Invention for
IMPROVEMENTS IN HOLDERS AND FITTINGS FOR ELECTRIC LAMPS and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to improvements in holders and fittings for electrical incan-
descent or glow lamps.
The form of lamp holder now generally employed has spring prongs or curved wires
against and within which the shoulder of the glow lamp bulb is pressed up until the
helical wire connecting springs are caught or disconnected as the case may be. The
movements necessary to effect this frequently damage or displace the platinum wire
loops sealed into the glass bulbs of such lamps.
The objects of my improvements are to simplify and improve the means for
connecting and disconnecting the lamp bulbs to or from their holders to obtain greater
steadiness for the lamp when in position and a better contact with the connecting
wires and to prevent undue damage or displacement of the platinum loops during
attachment to or removal from their holders.
And in order that my Invention may be fully understood and readily carried into
effect I will describe the accompanying two sheets of Drawings reference being had
to the figures and letters marked thereon.
Figure 1 is a sectional elevation of an electric incandescent or glow lamp with a
lamp holder and its fittings constructed and arranged according to my Invention.
Figures 2 and 3 are detail views of some of the fittings.
Figures 4, 5, 6, 7, 8 and 9 are detail views of the box or outer casing of the lamp
holder. Figure 4 is a diametrical section of the said box cover. Figure 5 is a plan
of the section A to B Figure 6 which Figure is a diametrical section of the box
without its cover. Figure 7 is a plan of the section B to Figure 6. Figure 8 is a
plan of the screw threaded section from D to C Figure 6 and Figure 9 is a plan of a
round milled edge nut for screwing on to the threaded section C to D Figure 6.
The improved lamp holder illustrated by Figure 1 of the Drawings is constructed
and arranged substantially as follows:-
I have as shown also in the detail views Figures 4 to 9 a tubular or cylindrical box
or outer casing open at the lower end and made say in two pieces a a¹ respectively
of which the body or main portion a is open at the lower end and is closed at the
upper end by a cover a' attached to the body a preferably by means of a bayonet
joint and thumb screws b. On an annular ledge a in the body a is fitted a disc c of
wood ebonite or other suitable insulating material secured in its position by pins or
otherwise. This disc c which is also shown detached in Figures 2 and 3 lias two
holes c Figure 2 drilled vertically through it and these holes care for the reception
of two closely coiled spiral or helical springs d of conical form the upper and wider
ends of which are soldered or otherwise secured into holes e¹ countersunk in two

page_text: plates or terminals e secured by nuts and screws to the upper side of the disc c.
Through the holes e in each plate e and down the centre of each conical spiral
spring d is passed a pin g which has a head at its upper end and terminates in a
hook g' at the other and lower extremity near which it is soldered to the apex of the
conical spring d through which it is passed. This arrangement admits of a longitu-
dinal or vertical in addition to a latitudinal or horizontal movement being imparted to
the hooks g' at the lower ends of the pins g by simply pressing or operating the heads
at their upper ends.
To attach the lamp bulb to the holder therefore it is only necessary to insert the
end of the bulb h into the open end of the holder and then operate the heads of the
pins so as to bring their hooks 9' into the required positions to connect them to
the platinum or other eyelets or loops i on the lamp bulb and for the purpose of
facilitating observation during this operation I make say three holes a³ (see
Figures 6 and 7) in the side of the body a of the holder through which the move-
ments of the hooks g¹ can be readily seen.
The shade fittings for the glow lamp I propose to employ are an opaline or other
glass disc k below which is placed a truncated globe m both the shades k and m being
Secured between a flange a on the exterior of the body a and a nut (Figure 9)
which is screwed on to the body a. The two shades k and m form a convenient
reflective arrangement somewhat resembling the planet Saturn and its ring. In some
cases 1 employ instead of the disc shade k a concavo-convex shade o as indicated by
dotted lines Figure 1 or other suitably shaped reflector attached to the holder as above
described this arrangement being particularly adapted to take the place of the oil and
wick holder in lamps of railway carriages.
In other cases the lamp may be suspended from a bracket similar to the ordinary
form of gas wall bracket by means of a hole a³ (see Figures 5 and 6) in the side of
the body a or a hole a (see Figures 1 and 4) in the top of the cover a¹.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what I
claim is :-
:-
1. The general construction combination and arrangement of parts embodying my
improvements in holders and fittings for electric lamps substantially as and for the
purposes herein described and as illustrated by the Drawings annexed.
2. The mode of connecting the platinum or other eyelets or loops of an electric
lamp bulb to the plates or terminals of the line wires by means of hooked pins or
equivalents connected by springs to said terminals in such manner that the hooks may
be moved in any direction required substantially as and for the purposes herein set
forth.
3. The combination with the platinum or other eyelets or loops of an electric lamp
bulb, of the hooked pins g the springs d and the plates or terminals e secured to an
insulating disc c all substantially as and for the purposes herein described with
reference to the accompanying Drawings.
4. The combination with the improved lamp holder of the shade fittings herein
described with reference to Figure 1.
5. The construction use and application of the box or outer casing substantially
as heroin shown and described in combination with the internal fittings of the lamp
holder as specified.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicant.