IMPROVEMENTS IN ARGAND GAS BURNERS."
Year: 1875

page_text: LETTERS PATENT to Henry Jewitt, of Kentish Town, in the County
of Middlesex, for the Invention of "IMPROVEMENTS IN ARGAND GAS
BURNERS."
."-A communication from abroad by William Rose, of
New York, United States of America.
Sealed the 31st March 1876, and dated the 4th October 1875.
PROVISIONAL SPECIFICATION left by the said Henry Jewitt at the
Office of the Commissioners of Patents, with his Petition, on the
4th October 1875.
I, HENRY JEWITT, of Kentish Town, in the County of Middlesex,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN ARGAND GAS BURNERS," a communication to me from abroad by William
Rose, of New York, United States of America, to be as follows:-
Heretofore this class of burners has been made in several parts of
cast or sheet metal, or both combined, each part being turned, bored,
stamped, or pressed into the desired form, and then the whole secured
together by lapping, pressing, soldering, or otherwise.
The improvements consist

page_text: of which corresponds with the interior of the body of the burner, by
means of an electric current, a suitable covering of copper or other
metal of the desired thickness to form said body or shell; then drilling
through the copper and into said metal mould the apertures for the
escape of gas, and thereafter melting out said metal mould, leaving the
outer metallic shell complete.
Secondly. In a device for governing the flow of gas, consisting of a
valve operated by an eccentric lever, which rests upon the top of the
"pillar" in such a manner that the said lever by being lifted or
depressed closes and opens the valve, and so arranged that it may
be adjusted horizontally to any desired position for convenience of
operation.
Thirdly. In a modification of the device for governing the flow of gas
by means of a lever attached to a cut or slotted pin working in a per-
forated or slotted tube, which tube is secured at the lower end in a
bushing attached to the lower end of the "pillar "of an argand burner,
and the upper end to the top of the "pillar," all so arranged that when
the lever is moved to turn the slotted pin the slot or hole in the vertical
tube will be covered, or partially so, by the solid portion of the pin, and
so close or regulate the flow of gas.
Fourthly. In a further modification of the governing device, which
consists of a plate attached by a pivot to the top of the bushing described
under the third head of this Specification, said plate being capable of
revolving, or partially so, upon the attaching pivot. In the head of the
bushing is or are perforations, and on the under side of the plate is or
are indentations. When the indentations in the plate correspond to or
are over the perforations the flow of gas is at its full, but on, the plate
being moved around by means of a lever or catch the solid part of the
plate will cover, or partially so, the perforations, and so cut off or
regulate the flow.
And, Fifthly. In an arrangement of wire holders for the chimney and
globe, which consists of a loop of wire being passed through cuts or
slots in the rim of the burner, and then turned up to form hooks or a
"gallery" for the globe, the chimney being held by the wire loops.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Jewitt in the Great Seal Patent Office
on the 3rd April 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
JEWITT, of Kentish Town, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of October, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Henry Jewitt, Her special
licence that I, the said Henry Jewitt, my executors, administrators,
and assigns, or such others as I, the said Henry Jewitt, 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 ARGAND GAS BURNERS," a communication to me from abroad by William
Rosc, of New York, United States of America, upon the condition
(amongst others) that I, the said Henry Jewitt, my executors or ad-
ministrators, by an instrument in writing under my, or their, or one of
their hands and scals, 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 immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Henry Jewitt, 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 and accompanying Sheet of Drawings (that is
to say) :-
'

page_text: or pressed into the desired form, and then the whole secured together by
lapping, pressing, soldering, or otherwise.
The improvements consist,
First. In a burner made by depositing on a metallic mold, the surface
of which corresponds with the interior of the body of the burner, by
means of an electric current, a suitable covering of copper or other metal
of the desired thickness to form said body or shell; then drilling through
the copper and into said metal mold the apertures for the escape of gas,
and thereafter melting out said metal mold, leaving the outer metallic
shell complete.
Secondly. In a device for governing the flow of gas, consisting of a
valve operated by an eccentric lever which rests upon the top of the
pillar in such a manner that the said lever by being lifted or depressed
closes and opens the valve, and so arranged that it may be adjusted
horizontally to any desired position for convenience of operation.
Thirdly. In a modification of the device for governing the flow of gas
by means of a lever attached to a cut or slotted pin working in a per-
forated or slotted tube, which tube is secured at the lower end in a
bushing attached to the lower end of the "pillar” of an argand burner,
and the upper end to the top of the pillar, all so arranged that when the
lever is moved to turn the slotted pin the slot or hole in the vertical
tube will be covered or partially so by the solid portion of the pin, and
so close or regulate the flow of gas.
Fourthly. In a further modification of the governing device, which
consists of a plate attached by a pivot to the top of the bushing described
under the third head of this Specification, said plate being capable of
revolving or partially so upon the attaching pivot. In the head of the
bushing is or are perforations, and on the under side of the plate is or
are indentations. When the indentations in the plate correspond to or
are over the perforations the flow of gas is at its full, but on the plate
being moved around by means of a lever or catch the solid part of the
plate will cover or partially so the perforations, and so cut off or regulate
the flow.

page_text: in the rim of the burner, and then turned up to form hooks or a
"gallery" for the globe, the chimney being held by the wire loops.
The Invention will be clearly understood by the following particular
description thereof, reference being had to the accompanying Sheet of
Drawings and to the figures and letters marked thereon:―
Fig. 1 represents half in elevation and half vertical section, and Fig. 2
in plan a gas burner having applied the first arrangement of device for
governing the supply of gas.
A, B, and C, represent the body of the burner, A being the annular
gas chamber, B the hollow arms, and C the pillar. In making this part
of the burner I first cast a metallic mold of type or other easy melting
metal, and of the required form. I hang this mold in an ordinary
electro-plating bath until it has deposited upon its surface the required
thickness of metal, after which I cut off the lower end, cutting through
the plating.
I then drill the holes H for the escape of gas, drilling a
short distance into the metallic mold, thus preventing the formation of a
burr around the inner edge of the holes. In this manner said holes are
more perfect than those made by punching or drilling, as ordinarily
done. I then melt out the metal mold, leaving the shell or body of the
burner complete. At the lower end of the pillar C I solder in a
bushing D of thicker material, which constitutes the nut by which the
burner is secured to the gas fixture, and also forms the scat for the valve
by which the flow of gas is regulated.
F is a valve resting on the opening in the top of the bushing D, its
stem passing up through the shell, as shown, and kept in position by a
spring. At the upper end of this valve stem is secured an eccentric G
forming part of the lever G'. This eccentric so rests upon the top of
the pillar C that by raising or lowering the lever G the valve F is opened
or closed, thus regulating the flow of gas through the burner, while by
moving the lower end of the lever horizontally around, the valve being
the axis, the lever can be adjusted in any desired position convenient for
operation.

page_text: of gas.
A represents the upper portion of an argand gas burner; B, the hollow
arms; C, the pillar; H, the apertures for the escape of gas; D a
female screw or bushing, soldered or otherwise secured in the lower end
of the pillar; E is a vertical tube, the lower end being secured in the
top of the bushing D, as shown, and the upper end being secured to
the top of the pillar; F is a pin fitted to the inside of the tube D.
There is a head on the lower end to prevent its rising, and a lever
secured to the upper end which prevents its depressing or lowering.
The lower end of the pin is cut away, as shown, so as to allow the gas
to flow up into the tube by the inlet formed by the space left by the
portion of the pin being cut away and out through the slot I into the
chamber K, and thence through the arms B to the apertures H. The
slot or opening I is in one side of the tube E near its lower end; by
turning the lever G₁ to the right or left the pin opens or closes the slot
I, thus regulating the flow of gas.
In Figs. 7, 8, 9, and 10, is represented the third arrangement of
device for governing the flow of gas. Fig. 7 being a vertical section;
Fig. 8, plan of the cover bushing D with circular perforations; Fig. 9,
plan showing slotted perforations in cover of bushing D; Fig. 10,
view of under side of plate L having indentations or portions thereof
cut away as at M. To the pivot F is attached a lever G¹ or a stud or
catch for turning the plate L, so that when the indentations M (which
may be of other form than quadrantal, as shown) of the plate L cor- 2
respond to or are over the perforations in the bead of the bushing D the
flow of gas will be at its full, as in Fig. 11; but on the plate L being
moved around by the lever G¹ or by a stud or catch the solid part of
the plate L will cover or partially so the perforations in the head of
bushing D, and so regulate or cut off the flow, as shown in the diagram
Fig. 12.

page_text: Having now described the nature and particulars of the said Inven-
tion, I claim, the improvements in argand gas burners, substantially as
herein described and illustrated by the Drawings.
In witness whereof, I, the said Henry Jewitt, have hereunto set
my hand and seal, this Sixteenth day of March, in the year of
our Lord One thousand eight hundred and seventy-six.
HENRY JEWITT. (L.S.)