IMPROVEMENTS IN AND CONNECTED WITH » PROVISIONAL SPECIFICATION
Year: 1882

page_text: LETTERS PATENT to Julius Ungar of 5 Chancery Lane in the County of
Middlesex for an Invention of "IMPROVEMENTS IN AND CONNECTED WITH
»
PROVISIONAL SPECIFICATION left by the said Julius Ungar at the Office
of the Commissioners of Patents on the 10th November 1882.
JULIUS UNGAR of 5 Chancery Lane in the County of Middlesex,
MENTS IN AND CONNECTED WITH LAMPS
"
"IMPROVE-
My Invention relates to improvements in and connected with street and other
lamps of a similar class.
In these lamps as usually constructed the dome holder and framework of the
ventilator are secured by soldering to the bars or ribs of the roof lights or glasses
which are glazed or secured to the bars or ribs with putty.
Now my Invention consists, Firstly, in forming the bars or ribs of the roof
lights or glasses of a double T or H section, the outer flanges of which are extended
and bent over for carrying the framework of the ventilator to which they are
rivetted or otherwise attached. The inner flanges of the bars or ribs are likewise
extended for carrying the dome holder to which they are attached.
Secondly I dispense with the use of putty in glazing the roof lights or glasses
by inserting the latter loosely between the flanges of the bars or ribs thereby
allowing play for expansion and so preventing the breakage of the glasses as is the
case when putty is used.
Thirdly. I hold the dome in position by rods or bolts passing through the
framework of the dome holder at each side of the dome the upper lip or flange of
which rests on the rods or bolts in lieu of the dome being suspended by hooks or
clips as at present.
Fourthly, For preventing the entrance of draught to the burners of street and
other lamps exposed to sudden gusts or currents of air I make use of discs or
flaps made of talc or equivalent material, one disc being placed inside the lamp
over the hole or entrance for the air, and the other disc similarly placed outside the
lamp. A suitable distance is left between the two discs which are united or
Prine II

page_text: combined at their centres by male and female sockets in the case of those lamps
where the gas pipe passes through the air hole and by three or more distance pins
or pieces sliding against the edge of the air hole in the case of lamps where no
pipe passes through the air hole.
The discs so arranged may be perforated or not with small holes for the
admission of air to the lamp.
On the occasion of a sudden draught or gust of wind the discs are blown
upwards and the lower or outside disc coming against the lamp thereby closes the
air hole and so prevents the admission of the draught to the exterior of the lamp.
On the subsidence of the draught the discs drop and allow the air to enter
the lamp.
If desired I may use tale or other equivalent in lieu of glass for the lights
of lamps.
This is especially applicable to lamps for the electric light wherein glass is very
liable to break, owing to the intense heat evolved in the immediate vicinity of
the light.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Julius Ungar in the Great Seal Patent Office on the 10th May
1883.
JULIUS UNGAR of 5 Chancery Lane in the County of Middlesex " IMPROVE-
MENTS IN AND CONNECTED WITH LAMPS
"
My Invention relates to improvements in and connected with Street lamps and
lamps of a similar class.
In such lamps as usually constructed, the dome holder and framework of the
Ventilator are secured by Soldering to the bars or ribs of the roof lights or glasses
which aro glazed or secured to the bars or ribs with putty.
On the accompanying sheet of drawings, Figure 1 is a general elevation of a
lamp constructed according to my invention, and Figures 2 to 6, detached views
of parts of figure 1, like letters of reference indicating corresponding parts in the
respective figures.
My Invention consists, Firstly, (as shewn by figures 1, 2 and 3) in forming the
bars or ribs a of the roof lights or glasses b of a double T or H section (see
detached view to enlarged scale in figure 3) the outer flanges a¹ of which (figures
and 2) are extended and bent over for carrying the framework c of the ventilator
c. d. to which framework c they are attached by being passed through the top
plate of the framework c and turned over thereat as shewn. Or they may be
rivetted or otherwise secured to the framework cas found most suitable. The
inner flanges a² of the bars or ribs a are likewise extended (figure 2) and rivetted
or otherwise attached to the dome holder e for carrying the latter.
Secondly. I dispense with the use of putty in glazing the roof lights or glasses b
by inserting the latter loosely between the flanges a' and a² of the bars or ribs a
thereby allowing play for expansion and preventing the breakage of the glasses b,
as is the case when putty is used.
Thirdly. I hold the dome f (seen in dotted lines figure 1) in position within its
holder e by three or more rods, screws or bolts g which pass through the frame-
work c of the ventilator c. d. at suitable distances apart, and through the dome
holder e (in which they are screwed) up to the dome ƒ beneath the upper lip or
flange which rests on the rods or bolts g in lieu of being suspended from the dome
holder e by hooks or clips as at present. This arrangement allows of the expansion
of the dome fand so prevents its breakage.
Fourthly. For preventing the entrance of draught to the burners of street and
other lamps exposed to sudden gusts or currents of air, I make use of two discs or
flaps . h. made of talc or equivalent material (see figures 1, 4 and 5) which are
united or combined by a suitable number of radial distance pins or pieces i sliding
against the edge of the bottom air hole ; in those cases where no gas pipe passes
through the hole as shewn, but where the gas passes through the air hole j (as in
figure 6) the discs or flaps h. h. may be united or combined at the centre by male
and female sockets k and when arranged on either principle may be perforated (or
not) as shewn in figure 4.
On the occasion of a sudden draught or gust of wind, the discs or flaps h. h¹. are
blown upwards and the lower or outside disc or flap h' coming against the bottom
of the lamp thereby closes the air hole j and so prevents the passage of the draught
to the interior of the lamp. On the subsidence of the draught, the discs or flaps
h. h. drop and allow the air to enter the lamp.
Or in lieu of joining the discs or flaps h. h. together as described, they may be
set at the required distance apart in a ring or rim of any suitable material and

page_text: pivoted at opposite points of the circumference of the ring to the edge of the air
hole which is provided with a similar ring for that purpose. If desired I may
use tale or other equivalent material in lieu of glass for the lights of the lamp,
this being especially applicable to lamps for the electric light.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I consider novel and original and
therefore claim as the Invention secured to me by the hereinbefore in part recited
Letters Patent, is :-
1. In lamps, forming the bars or ribs carrying the roof lights or glasses of a
double T or H section, and extending their outer and inner flanges, substantially
as and for the purposes hereinbefore described and illustrated by the accompanying
drawing.
2. Inserting the roof lights or glasses loosely between the flanges of the bars or
ribs in lieu of glazing them thereto with putty, substantially as and for the 1
purpose herein before described and illustrated by the accompanying drawing.
3. The application and use of rods, screws or bolts, for supporting the dome, in
-lieu of hooks or clips, substantially as and for the purpose hereinbefore described
and illustrated by the accompanying drawing.
4. The application and use of discs or flaps of tale or equivalent material to the 2
bottom air hole, substantially as and for the purpose herein before described and
illustrated by the accompanying drawing.
5. The application and use of tale for the lights in lieu of glass, substantially as
and for the purpose hereinbefore described.
In Witness Whereof I the said Julius Ungar have hereunto set my hand 2
and seal this 4th day of May in the year of our Lord One thousand eight
--hundred and eighty-three..