AN IMPROVED EXTENSION CHANDELIER
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by William Robert Lake at the
Office of the Commissioners of Patents, with his Petition, on the
-
5th October 1868. A communication from abroad by Hiram
Tucker, of Newton, Massachusetts, United States of America.
I, WILLIAM ROBERT LAKE, of the "International Patent Office,"
No. 8, Southampton Buildings, Chancery Lane, in the County of
Middlesex, Consulting Engineer, do hereby declare the nature of the said
Invention for "AN IMPROVED EXTENSION CHANDELIER," a communication, to.
be as follows:-
This Invention relates to means or devices by which a chandelier or
other lamp or burner-carrying apparatus suspended from a fixed support
may be lowered and raised within reasonable extreme limits, and locked
or fastened in position at either of the extreme limits or at any point.
between them.
In the said Invention there is attached to the top piece, in which is
fixed a ring or hook for the purposes of suspension, and which top piece
may be made of any ornamental form, a central rod, and also at suitable
points beyond the said rod and at equal distances therefrom closely
coiled helical springs, preferably three or more. The bottom part of the.

page_text: chandelier to which the lamps, candle holders, or burners are attached is
provided with a vertical tubular stem which surrounds the rod depending
from the top part, and the long helical springs before named are attached
to the bottom part of the chandelier, the said springs being so pro-
portioned to the weight of the bottom or movable part of the chandelier
that when such part is located about half way between its extreme points.
of movement there shall be a condition of equilibrium. On the top of
the chandelier tube a piece is secured which serves for the fulcrum of a
lever, one arm of which is perforated with a hole a little larger than the
diameter of the rod before mentioned, while the other arm receives at its
end a string, chain, or other means by which the position of the lever
may be changed, the lever being so made that in its normal condition its
arm embracing the rod inclines downward, the effect of which arrange-
ment is to cause the lever to resist any upward tendency of the bottom
of the chandelier caused by the pull of the springs when they are
extended beyond the amount due to the weight suspended thereupon.
When the position of the lever is changed so that its arm embracing the
central rod inclines upward from the fulcrum, then the lever resists any
pull or weight tending to extend the springs in moving the bottom part
of the chandelier downward. When the lever is in a horizontal position
then the sides of the hole therein embracing the central rod are free from
contact therewith, and the bottom part of the chandelier may be moved
up or down as desired, and when said part is at the point desired, change
in position of the lever to incline downward with its perforated arm from
the fulcrum will prevent upward movement, while if downward move-
ment is to be prevented said arm is shifted in position so that it inclines
upward from its fulcrum. To prevent such extension of the springs as
will injure them a head is formed on the lower end of the rod, which
coming against a check in the upper end of the tube will limit the
extent of downward movement, and to prevent vibration an opened
coiled spring is placed around the rod between its head and the check
in the tube. In combination with the string or other pulling means
attached to the lever is arranged a closely coiled spring or a rubber
spring, so that when after the chandelier has been drawn downward the
said string or other connection is drawn to extend the said spring, and
is fastened to a pin or catch in the lower part of the chandelier, the
spring will, upon slightly drawing down the chandelier, elevate the long
arm of the lever and incline it upward from its fulcrum, thus allowing
the lower part of the chandelier to be raised.

page_text: When it is desirable to make use of this Invention in a gas burning
chandelier the rod before mentioned may be the gas supply tube, which
should then be packed where it enters the tube attached to the bottom of
the chandelier, and suitable gas passages can be made to extend to the
various burners in any well-known manner employed in other gas
burning extension chandeliers.