IMPROVEMENTS IN LAMDO
Year: 1864

page_text: LETTERS PATENT to Michael Alexander Dietz, of St. Paul's Buildings,
Little Carter Lane, in the City of London, Lamp Manufacturer, for the
Invention of " IMPROVEMENTS IN LAMDO"
Sealed the 5th July 1864, and dated the 13th January 1864.
PROVISIONAL SPECIFICATION left by the said Michael Alexander Dietz
at the Office of the Commissioners of Patents, with his Petition, on
the 13th January 1864.
I, MICHAEL ALEXANDER DIETZ, of St. Paul's Buildings, Little Carter Lane,
in the City of London, Lamp Manufacturer, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN LAMPS," to be as follows:-
The object of this Invention is to improve lamps which are supplied with air
for assisting combustion by mechanical means. The oil vessel or reservoir
I make detachable from the lamp and secure it to a cap piece which fits on to
the vase or case of the lamp, and thus holds the oil vessel in suspension in
the vase or case. The diameter of the oil reservoir and vase or case are such
relatively as to allow of the free passage upward of a current of air to the
burner, which current is produced by a fan or blower below, actuated by
suitable mechanism or clockwork. The fan I mount immediately below the
oil vessel, so as to make available, to the greatest extent, the power exerted
by the clockwork, and in large lamps I propose to insert the air-propelling
mechanism within the vase or case of the lamp above the pillar or pedestal.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Michael Alexander Dietz in the Great Seal Patent Office
on the 13th July 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MICHAEL
ALEXANDER DIETZ, of Saint Paul's Buildings, Little Carter Lane, in the City
of London, Lamp Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of January, in the year of our
Lord One thousand eight hundred and sixty-four, in the twenty-seventh
year of Her reign, did, 'for Herself, Her heirs and successors, give and grant
unto me, the said Michael Alexander Dietz, Her special license that I, the said
Michael Alexander Dietz, my executors, administrators, and assigns, or such
others as I, the said Michael Alexander Dietz, 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 LAMPS," upon the condition (amongst others)
that I, the said Michael Alexander Dietz, by an instrument in writing under
my hand and seal, 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 Michael Alexander Dietz, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Drawing hereunto annexed and
to the letters and figures marked thereon (that is to say) :-
This Invention relates to certain improvements in the details of construction
of lamps which are supplied by mechanical means with air for assisting com-
bustion, the chief object being to increase the efficiency of the blast of air
delivered to the burner by the fan or blower of such lamps. To this end I
suspend the oil vessel or reservoir (which I make detachable) in the vase of
the lamp so that its. means of support shall offer no appreciable obstruction to
the passage upwards of the blast of air, and the fan or blower I place so that
it shall deliver the blast directly into the air channel surrounding the reservoir

page_text: instead of the air having to traverse the length of the pillar as is usual in this
kind of lamp.
In the accompanying Drawing Fig. 1 is an elevation of my improved
lamp; Fig. 2 is a vertical section of the same, and Fig. 3 is a detached view
of the lamp p
a is the pillar, and a¹ the vase of the lamp which may be made of metal,
porcelain, or other suitable material, and which terminates in a lip b; c, is an
ordinary spring barrel which by means of a train of toothed wheels com-
municates the requisite rotary movement to the fan or blower d. This fan d
is mounted horizontally in the neck of the lamp immediately below the
reservoir e, and when in action it draws air from below through suitable
openings at the base of the stand or pillar and forces it up in the direction of
the arrows, Fig. 2, towards the spot where combustion takes place. The
reservoir e which contains the oil is suspended within the vase a¹ so that a free
space is provided all round the reservoir for the passage upwards of the air.
The reservoir is surmounted by a removeable capf in which is set the wick
carrier g; h is an outer cover which is fastened to the reservoir by screws i, i,
or by other convenient means that will not arrest the free passage of the air to
the burner. The foot of this cover fits hermetically the lip of the vase a' at
the parts b, b, and at top the cover is provided with the cap k common to lamps
in which hydrocarbon oils are burned. When it is required to trim, inspect,
clean, or repair the lamp, it is only necessary to remove the upper part at the
junction b, b. The reservoir is made flat at bottom in order to allow of its
being set independently on a table, thus while the lamp is being filled, or the
wick trimmed, I avoid the danger very common to lamps of this kind, viz*.; of
oil or bits of wick falling into the clockwork movement, the least particle of
the latter being sufficient to stop its movement and necessitate its being taken
to pieces in order to repair it.
It will also be observed that the taking to pieces and putting together again
of the two principal essential parts of this lamp are effected with great facility.
For greater security in this respect I may if thought necessary provide the
neck with perforated metal or wire gauze which while it admits of the
passage of the air upwards from the blower would prevent any falling body
other than liquid from entering the body of the lamp..
I have stated that the fan I mount immediately below the oil vessel so as to
make available to the greatest extent the power exerted by the clockwork, but
in large lamps I may find it desirable to insert the air propelling mechanism
within a vase or case of the lamp above the pillar or pedestal.
Having now set forth the nature of my Invention of "Improvements in

page_text: Lamps," and explained the manner of carrying the same into effect, I wish it
to be understood that under the above in part recited Letters Patent, I claim.
mounting the oil vessel or reservoir immediately above the blower in the
manner and for the purpose above described.
In witness whereof, I, the said Michael Alexander Dietz, have here-
unto set my hand and seal, the 13th day of July, in the year of
our Lord One thousand eight hundred and sixty-four.
MICHAEL ALEXANDER DIETZ. (L.S.)