Year: 1888

page_text: We ALBERT GRAETZ, ADOLF GRAETZ and MAX GRAETZ all of 31 Lausitzer Strasse
Berlin S.O. Germany, inanufacturers, 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:—
Our invention has for its object the trimming of the wicks and lighting of lamps
with facilitaty, and the said invention consists of the construction and arrangements
hereinafter described of the parts of the said lamps, whereby the gallery carrying the
chimney and globe of the lamp, can be raised and held in the raised position for
trimming the wicks or lighting them without removing the globe or chimney from the
gallery and without separating or detaching any of the parts of the lamp.
To the underside of the globe gallery is a ring fitted, to which is fitted a rack into
which a pinion engages, the pinion being fastened to a spindle running at right angles
to the rack and revolved by means of a thumb piece.
The gallery is held up by the last tooth in the rack lying on a peculiar long.
tooth in the pinion and cannot be depressed without turning the pinion by hand.
In order to make our invention more clear, we refer to the accompanying sheet of
drawings which forms part of this present specification and in which similar letters
denote similar parts throughout the different figures.
Fig. 1 represents a vertical section of a burner fitted with our improvement, the
gallery being in the raised position.
Fig. 2 is a top view of fig. 1.
Fig. 3 shows a modified form of the locking mechanism.
Fig. 4 is a top view of fig 3.
Fig. 5 shows a second modification of the locking mechanism.
Fig. 6 is a top view of fig. 5.
In figs. 1 and 2 A is the shade holder which is fastened by a bayonet joint to the
ring b to wich the rack c is fastened.
The rack c is operated by the toothed pinion d on the shaft e; the said shaft e
has a thumb piece f at its outer end by which the pinion d is revolved and the
rack c raised.

page_text: When the thumb piece f is revolved the pinion revolves with it and the pinion e
gearing in the rack c raises it and with it the gallery and lamp globe.
When the gallery is lifted, it is held in its position by the last tooth of the rack
catching in a grove in the last tooth g of the pinion e. There is a large space g¹ in the
rack e to allow the tooth g to pass. It will be seen that it is utterly impossible for the
rack c to descend, so long at the last tooth of the same rests in the grove in the tooth g,
but it may easily be lowered by turning the pinion e by hand.
In the modification shown in figs. 3 and 4, the gallery is raised in the same manner
as that already described, but is held up by a lever J which is brought into operation
by a pin h on the wheel e¹. The lever J is movable round the point k; the pin h
catching in the slot L moves the lever, so that the projection m catches in the hole n
in the rack c', as shown; the dotted lines show the position of the lever J when out
of gear.
In the modification shown in figures 5 and 6 the principle is the same as that
explained for figs 3 and 4, butt he lever J' is a lever of the second order and that shown
in fig. 4 of the first order.
The pin on the pinion d catches in the slot and moves it into the position
shown, the dotted lines showing the position of the same when out of gear; the lever J'
is movable round the pin k¹.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :
1) In lamp-burners, a rack gearing in a pinion and bearing the shade holder or
gallery, in combination with a holding device, for the purpose of holding the shade
holder or gallery in an elevated position, substantially as described.
E
2) In lamp burners a rack c carrying the shade holder or gallery 6 in combination
with a pinion d having
one tooth g longer than the rest, the said rack chaving
corresponding space g to allow of it passing, substantially and for the purpose as
described.
3) In lamp-burners a rack c¹ and pinion having a pin ½, in combination with a
locking lever y, substantially and for the purpose as described.
4) In lamp-burners a rack and pinion having a pin h¹ in combination with a
locking lever y¹, substantially and for the purpose as described.
Dated Berlin, this 17th day of November 1888.
ted Berlin, this 17th day of November 1888.
ALBERT GRAETZ.
ALFRED GRAETZ.
MAX GRAETZ.
By A. Kuhnt & R. Deissler,
38, Alexander Strasse, Berlin C., Germany.