IMPROVEMENTS IN STREET AND OTHER LAMPS OR LANTERNS, AND IN APPARATUS FOR REGULATING THE SUPPLY OF GAS THERETO, AND TO OTHER GAS BURNERS
Year: 1874

page_text: LETTERS PATENT to David Hulett, of 55 and 56, High Holborn, in
the County of Middlesex, Gas Engineer. for the Invention of
"IMPROVEMENTS IN STREET AND OTHER LAMPS OR LANTERNS, AND IN
APPARATUS FOR REGULATING THE SUPPLY OF GAS THERETO, AND TO OTHER GAS
BURNERS."
"IMPROVEMENTS IN STREET AND OTHER LAMPS OR LANTERNS, AND IN
APPARATUS FOR REGULATING THE SUPPLY OF GAS THERETO, AND TO OTHER GAS
BURNERS."
Scaled the 23rd February 1875, and dated the 24th August 1874.
PROVISIONAL SPECIFICATION left by the said David Hulett at the
Office of the Commissioners of Patents, with his Petition, on the
24th August 1874.
I, DAVID HULETT, of 55 and 56, High Holborn, in the County of
Middlesex, Gas Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STREET AND OTHER LAMPS OR LANTERNS, AND
IN APPARATUS FOR REGULATING THE SUPPLY OF GAS THERETO, AND TO OTHER GAS
BURNERS," to be as follows:-
My improvements in street and other lamps or lanterns consist of
simple and effectual means for securing the glass panes in the skeleton

page_text: or frame without the use of putty or cement of any kind, whereby the
glass may be secured or more readily removed and replaced.
According to one mode of carrying out this Invention I hinge to the
skeleton or frame of the lamp or lantern metal flaps or pieces of metal,
which are capable of being turned over on to the edges of the glass, and
secured in that position by means of buttons, bolts, or any other suitable
fastening, whereby the pieces of glass are held securely between the said
hinged pieces and the skeleton or frame. Or in lieu of hinging the
pieces of metal to the frame of the lamp I cut or form angular slots in
the said metal pieces, and fit them so as to slide over metal studs or
projections somewhat in the manner of a bayonet joint, whereby the
metal pieces may be easily slid over the edge of the glass, and thereby
hold the said glass securely in the frame.
The sliding or hinged picces may be made removable from the frame
if desired, but I prefer to connect them permanently thereto.
My improved apparatus for regulating the supply of gas to street and
other lamps and other burners consists of a valve through which the gas
is caused to pass on its way to the burners, the passage of such gas
being regulated by raising more or less the valve or diaphragm from off
its scat. The valve or diaphragm is attached to one end of a screwed
stem which works in a female screw formed in the boss of a pinion
fitted to rotate on a collar in the valve, the rotation of which pinion
acting as a nut raises or lowers the valve from off or on to its seat.'
This pinion gears with. another pinion, and also with a spur wheel,
which work in suitable bearings in the valve box or outer case in which
the valve is contained. The pinion which actuates the valve is rotated
by means of a knob or handle fitted to the axle of the pinion with
which it gears, or on to the axle of the pinion which actuates the valve
spindle. The rotation of the pinion on the valve spindle also imparts
motion to the spur wheel before mentioned, upon the axle of which is
fitted a pointer which indicates the position of the valve on a dial on
the face of the outer case.

page_text: SPECIFICATION in pursuance of the conditions of the Letters filed
by the said David Hulett in the Great Seal Patent Office on the
24th February 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
HULETT, of 55 and 56, High Holborn, in the County of Middlesex, Gas
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of August, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said David Hulett, Her special license
that I, the said David Hulett, my executors, administrators, and
assigns, or such others as I, the said David Hulett, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
STREET AND OTHER LAMPS OR LANTERNS, AND IN APPARATUS FOR REGULATING THE
SUPPLY OF GAS THERETO, AND TO OTHER GAS BURNERS," upon the condition
(amongst others) that I, the said David Hulett, my executors or ad-
ministrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immeediately after the date of the
said Letters Patent.
NOW KNOW YE, that I, the said David Hulett, do hereby declare
the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :—
My improvements in street and other lamps or lanterns consist of
simple and effectual means for securing glass panes in the skeleton or
frame without the use of putty or cement of any kind; the panes when
broken may also be readily removed and replaced.

page_text: According to one mode of carrying out this Invention I hinge to the
skeleton or frame of the lamp or lantern metal flaps or pieces of metal
which are capable of being turned over on to the edges of the glass,
and secured in that position by means of buttons, bolts, screws, or any
other suitable fastenings, whereby the pieces of glass are held securely
between the said hinged pieces and the skeleton or frame. Or in licu
of hinging the pieces of metal to the frame of the lamp I cut or form
angular slots in the said metal pieces, and fit them so as to slide over-
metal studs or projections somewhat in the manner of a bayonet joint,
or the slots may be in the frame, and the studs in the metal pieces.
These metal pieces may then be easily slid over the edge of the glass,
and thereby hold the said glass securely in the frame.
The sliding or hinged pieces may be made removable from the frame
if desired, but I prefer to connect them permanently thereto..
My improved apparatus for regulating the supply of gas to street
lamps and other burners consists of a valve, through which the gas is
caused to pass on its way to the burners, the passage of such gas being
regulated by raising more or less the valve or diaphragm from off its
seat. The valve or diaphragm is attached to one end of a screwed stem,
which works in a nut formed in the boss of a pinion fitted to rotate on
a collar in the valve. The rotation of this pinion raises or lowers the
valve from off or on to its seat. This pinion gears with another pinion,
and also with a spur wheel, which work in suitable bearings in the
valve box or outer case in which the valve is contained.
The pinion on
the valve spindle receives motion from another pinion gearing into it,
which is rotated by a handle, key, or knob fitted to the axle, or the
handle may be fitted directly to the valve pinion. The rotation of the
pinion on the valve spindle also imparts motion to the spur wheel, upon
the axle of which is fitted a pointer which indicates the position of the
valve on a dial attached to the face of the outer case.
And in order that my Invention may be better understood, and more
readily carried into operation, I will now proceed to describe the Draw-
ings hereunto annexed.
Figure 1 shews a sectional view of my improved lantern drawn to a
small scale. A, A, are the glass panes; B, B, the skeleton or frame;
C, the hinge which may be dropped over the glass, and secured by a
button or bolt; D, D, the metal flaps with angular slots; E, a stud
working in the slot, and holding the flaps against the glass,

page_text: Figure 2 represents a front elevation, and Figure 3 a section of the
valve arrangement for regulating the supply of gas. G is the valve
box; H, the diaphragm preferably made of prepared leather; K, the
valve seating; L, the screw attached to diaphragm; M, the nut or boss
of the pinion N; O, the lower pinion with square recess Q to receive
the handle; P, the spur wheel with the pointer or finger R attached to
its axle.
Figure 4 shews to a larger scale my improved hinged flaps, as shewn
at c, Figure 1.
Now having particularly described and ascertained the nature of my
said Invention, and how the same is to be carried into operation, I would
have it understood that what I claim and desire to secure by the herein-
before in part recited Letters Patent is,―
Firstly. The use of metal flaps or pieces of metal capable of being
turned over on to the edges of the panes of glass, and secured by bolts
or other like fastenings for street and other lamps, as herein-before
described and illustrated by accompanying Drawing.
•
Secondly. The use of a sliding clip for fastening panes of glass into
lamps without putty or cement, making a kind of bayonet joint, as
herein-before described and illustrated by accompanying Drawing.
And, Thirdly. The construction and use of a valve and indicator for
regulating the supply of gas to the burners, substantially as herein-
before described and illustrated by accompanying Drawing.
In witness whereof, I, the said David Hulett, have hereunto set
my hand and seal, this Twenty-fourth day of February, in
the year of our Lord One thousand eight hundred and seventy-
five.
Witness,
CHARLES BARLOW,
Patent Agent,
23, Southampton Buildings,
London,
W.C.
D. HULETT. (L.S.)