Improvements in and applicable to Lamps.
Year: 1890

page_text: Date of Application, 14th Nov., 1890
Complete Specification Left, 7th Mar., 1891-Accepted 11th Ann
1004
PROVISIONAL SPECIFICATION.
Improvements in and applicable to Lamps.
I, SALOMON FALK, of the firm of Falk, Stadelmann & Company, Limited, of
83, 85, and 87, Farringdon Road, in the County of London, Manufacturers, do
hereby declare the nature of this invention to be as follows :—
My invention relates to lamps for burning hydrocarbon and other oils and has for
its object to provide improved means for raising and lowering the gallery and dome
of a lamp so as to afford ready access to the wick.
In carrying out my invention I employ two gear wheels or segments of gear
wheels which are mounted eccentrically so as to engage with each other, one being
secured to the lifting key whilst the other is connected to the moveable part of the
burner. The relative positions of the said gear wheels is such that when the gallery
and dome are in their normal position the axes of rotation of the said wheels will
be practically close together and when the gallery and dome are raised at their
greatest distance apart, the centres of the said wheels are preferably connected by
a link to maintain the two wheels in their proper relative positions.
Dated the 14th day of November 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and applicable to Lamps.
I, SALOMON FALK, of the firm of Falk, Stadelmann & Company, Limited, of
83, 85, and 87, Farringdon Road, in the County of London, Manufacturers, do
hereby declare the nature of this invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:--
My invention relates to lamps for burning hydrocarbon and other oils, and has
for its object to provide improved means for raising and lowering the gallery and
dome of a lamp so as to afford ready access to the wick.
In carrying out my invention I employ two gear-wheels or segments of gear-
wheels which are mounted eccentrically and engage with each other, one being
secured to the lifting key whilst the other is connected to the movable part of the
burner. The centres of the said wheels are preferably connected by a link to
maintain the two wheels in their proper relative positions.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which :-
Figure 1 is a vertical central section of so much of a lamp-burner as is necessary
to illustrate the application of my invention thereto :
Figure 2 is a view similar to Figure 1 but shewing the parts in the position
which they occupy when the dome is raised:
Figure 3 is a view taken at right angles to that shewn in Figure 2 and with the
parts in the same position.
a indicates the foundation or portion of the burner upon which the dome and
gallery are carried; indicates the said dome and gallery, and c, e the guides upon
which the said dome and gallery slide. d, e indicate the segmental gear-wheels,
which, as shewn, are respectively connected to the dome b and foundation a at the
points fg, the said points of connection being at or near the peripheries of the
[Price 6d.]

page_text: said segmental gear-wheels so that, when the dome is resting upon the foundation a,
the said points f, will be in close proximity, as shewn in Figure 1, but which,
when the dome is raised, will be at their greatest distance apart, as shewn in
Figure 2.
is the lifting key or spindle carried in a bearing in the part a and having the
wheel e secured to it, the said spindle serving for rotating the said wheel. With
this arrangement it will be obvious that when the wheel e is turned by means of the
lifting key, it will act upon the wheel e to raise the dome and gallery.
i is the link which is connected to the centres of the wheels d, e and serves to
maintain the same in gear.
It will be noticed that the tooth of each gear-wheel most remote from its pivot is
made larger than the other teeth in order to prevent the said wheels from being
moved too far when the dome is fully lifted.
It will also be noticed by reference to Figure 2 that when the dome is fully lifted
the centres of the wheels d, e are slightly to one side of a line drawn between the
centres of the points f, g, thereby ensuring that the weight of the dome and gallery
and the globe or chimney carried thereby shall not cause the said dome to
accidentally fall.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A. lamp-burner or lamp, the gallery and dome of which are adapted to be
elevated by means of two eccentrically mounted segmental gear-wheels, substantially
in the manner described.
2. The manufacture and use of a lamp or lamp burner provided with means for
lifting the gallery and dome, substantially as hereinbefore described and illustrated
in the accompanying drawing.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.