Improvements in Electric Lamps, and Means for Securing Electric Lamps in Carriages and like Vehicles.
Year: 1889

page_text: Date of Application, 22nd Aug., 1889
Complete Specification Left, 22nd May, 1890-Accepted, 5th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Electric Lamps, and Means for Securing Electric
Lamps in Carriages and like Vehicles.
I GEORGE FRANCIS SLATTER, of 132, Long Acre, Middlesex, Carriage Builder do
hereby declare the nature of my said invention to be as follows:-
This invention relates
1. To novel means for preventing the filament of incandescent lamps dropping
from the vibration or jolting motion of vehicles while travelling.
2. To means for securing an incandescent lamp in or to the body, roofing, or other
part of a vehicle such as those used for pleasure and like purposes.
According to the present construction or arrangement of incandescent lamps a
glass globe containing the filament is suspended vertically or at an angle and in
most cases said globe or lamp is enclosed in another glass or bason as a protection
against fracture.
By the first part of my invention I make the glass filament container of rectangular
shape with rounded or curved ends and with flattish sides. I also embed an additional
piece of metal (platinum) in the tail end with an eye or loop projecting for fixing
that end of the container rigidly to the holder which I prefer to be the silvered,
enamelled or other reflector, the other end of the container having the two
platinums for conduction purposes with mounts for fixing that end in or to the
reflector.
The two platinum wires to which the filament is attached has a T shaped piece of
glass moulded or affixed to the arms to distance the wires and to hold them somewhat
rigidly, the leg of the T being bulbed or bent to rest upon the container. This T
or crutch is the important feature in this part of my invention; it prevents vibration
and centralizes the filament, it also supports the inside wires and enables much
longer wires than usual to be employed for the better position of the filament in a
flat lamp set horizontally.
Such an incandescent lamp can be fitted in the roof, the lining or other part of a
brougham, or other closed carriages, or a railway coach, a tram car or the like-
recessed with a bullseye or lens, dioptric or other, for concentrating or for diffusing
the light or a plain glass screen, disc shape, can be used as desired.
In fitting such a lamp as above described or any other shape or form of incan-
descent lamp in the roof or side body of a road vehicle which is subject to severe
jolting and oscillation I affix the reflector to a piece of sheet rubber stretched and
attached to the hoop sticks or to a frame connected to them or to the body frame or
lining. This method of suspending or supporting incandescent lamps forms the
second part of my invention as it secures the lamp in such a manner that the joltings
and oscillation of the vehicle while travelling are not imparted to the lamp,
consequently the light is kept steady and also the filament and the platinum
wires.
Dth: 90-11 of A1000

page_text: COMPLETE SPECIFICATION.
Improvements in Electric Lamps, and Means for Securing Electric
Lamps in Carriages and like Vehicles.
I GEORGE FRANCIS SLATTER of 132 Long Acre, Middlesex, Carriage Builder do
hereby declare the nature of my 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
1. To novel means for preventing the filaments of incandescent lamps dropping
from the vibration or jolting motion of vehicles while travelling.
2. To means for securing an incandescent lamp in or to the body roofing or other
part of a vehicle such as those used for pleasure and like purposes.
According to the present construction or arrangement of incandescent lamps, a glass
globe containing the filament is suspended vertically or at an angle and in most
cases said globe or lamp is enclosed in another glass or bason as a protection against
fracture.
By the first part of my invention I make the glass filament container of rectangular
shape with rounded or curved ends and flattish sides. I also embed an additional
piece of metal (platinum) in the tail end with an eye or loop projecting for fixing
that end of the container rigidly to the holder which I prefer to be the silvered,
enamelled or other reflector, the other end of the container having the two platinums
for conduction purposes with mounts for fixing that end in or to the reflector.
The two platinum wires to which the filament is attached have a T shaped piece
of glass moulded or affixed to the arms to distance the wires to hold them somewhat
rigidly, the leg of the T being bulbed or bent to rest upon the container. This
Tor crutch is the important feature in this part of my invention, it prevents vibration
and centralizes the filament it also supports the inside wires and enables much longer
wires than usual to be employed for the better position of the filament in a flat lamp set
horizontally.
Such an incandescent lamp can be fitted in the roof, the lining or other part of
a brougham or other close carriage or a railway coach, a tram car or the like, recessed
with a bulls-eye or lens, dioptric or other, for concentrating or for diffusing the light
or a plain glass screen, disc shape, can be used as desired.
In fitting such a lamp as above described or any other shape or form of incandescent
lamp in the roof or side body of a road vehicle which is subject to severe
jolting and oscillation I affix the reflector to a piece of sheet rubber stretched and
attached to the hoop-sticks or to a frame connected to them or to the body frame or
lining. This method of suspending or supporting incandescent lamps forms the second
part of my invention as it secures the lamp in such a manner that the jolting and
oscillation of the vehicle while travelling are not imparted to the lamp consequently
the light is kept steady and also the filament and the platinum wires.
Figure 1 of the drawings is a sectional elevation with the two parts of my invention
in combination.
Figure 2 is an under-side elevation of the same.
Figure 3 indicates the position of the lamp as fitted to the inside of a carriage
roof.
Figure also shows an ordinary incandescent lamp on the outside of the carriage
body, but my flat lamps before described may be used, the ordinary lamp as shown
at Figure 4 being attached to and suspended from a sheet or strip of india rubber
as before.
According to Figure 31 arrange the battery in the boot box and by a lever worked
from the drivers seat the electrodes can be raised from or lowered into the cells as
desired. The conducting wires are in connection with a switch and either the inside
or the outside or both inside and outside lamps can be put into circuit.
Figure 5 is a sectional elevation of an outside lamp with my india rubber

page_text: suspension piece affixed at its edges to the upper part of a square frame the con-
duction wires being led down behind a reflector carrier into the stem in which a spring
contact piece with an angled face is arranged to press against another angle faced piece
of the continuation wire leading to the battery and to the lamp or lamps.
A is a sheet of india rubber capable of being secured around its edges to say the
roof hoops or roof frame of a carriage.
B is a ring frame of metal secured within the edge of a central hole in the india-
rubber.
C is a band made in a piece with a reflector D and with the india-rubber fastened
to it.
E is a glass shield.
F is the incandescent electric lamp of flat shape.
G is the glass crutch fastened to the platinum wires H, H, and extending some
distance between the filament I where it has a short post J to rest upon the glass
of the lamp F and thus hold the filament up and so shorten the fulcrum as to prevent
oscillation being imparted to it.
K is the tail end of the lamp and L the attachment pin the opposite end of which
is screw threaded for adjustment in the band C previous to fixing the lamp by the
screw pin M.
N, N, are the connections with the platinum wires and with the conducting wires
from a battery as usual.
It will be observed that the lamp proper is suspended by the pieces L, M, and
that the lamp and its attachments are also independently yet collectively suspended by
the india rubber sheet or web A.
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
1. Supporting the platinum wires and the filament of an incandescent electric
lamp from within the lamp, said support being independent of the usual end support
as set forth.
2. The double suspension appliances of an electric incandescent lamp and of its
attachments as means for subdueing vibrations of the lamp and for preventing
oscillation of the filament as set forth.
3. Fixing an india rubber sheet web and attaching an incandescent electric lamp
frame thereto as a means for suspending an electric incandescent lamp in or from a
carriage as and for the purposes set forth and substantially as shown at Figures 1, 2,
and 3 for inside lamps and at Figures 3, 4 and 5 for outside lamps.
Dated this 92nd day of May 1800.
H. GARDNER,
166, Fleet Street, London, Patent Agent, Agent for the said G. F. Slatter.