An Improved Adjustable Support for Lamps and other Articles.
Year: 1889

page_text: Date of Application, 22nd Feb., 1889
Complete Specification Left, 22nd Nov., 1889-Accepted, 28th Dec., 1889
PROVISIONAL SPECIFICATION.
An Improved Adjustable Support for Lamps and other Articles.
I DANIEL COLEMAN DEFRIES, of 3 Fairfax Road, Hampstead N.W., Gentleman,
do hereby declare the nature of this invention to be as follows:-
This invention relates to a device whereby the raising and lowering and adjustment
of the sliding rod or tube of a vertical standard or pendant support is greatly
simplified, and it consists essentially in the application of a loose ball or sphere to
arrest by friction the sliding movement, and of means whereby this stop is removed
by pressure.
I form or fit upon the outer tube a recess, chamber, or box, open to the inner con-
centric tube or rod on one side, one or more of the other sides or surfaces of the box
tapering downwards forming an incline to the bottom of the box, or the bottom part
of the box being in any way formed of less area than its upper part. The bottom of the
box may be so made that it may be raised within the box by a lever or otherwise,
or I may provide a false bottom, which may be raised and lowered, or I may fit a spring
or springs upon the inside of the bottom of the box so that it may be operated from
the exterior. Upon this moveable bottom or spring I place a ball or sphere of such
size that when upon its seat a portion of its periphery will project through the opening
in the box and touch the inner tube or rod.
Thus, when it is desired to lengthen or to shorten the standard support, or the
pendant, it is only necessary to raise the ball from its normal position at the bottom of
the box or recess to the larger area at the upper part (by actuating the spring or
moveable bottom by lever or otherwise) to free the sliding rod or tube, and when this
is brought to the desired position, the ball being left free to run or fall to the
bottom of its box it will prevent any further raising or lowering of the inner rod or
tube by the friction it will then exercise thereupon.
The box, chamber, or recess may be formed at any convenient point of the outer
tube and my device will be found not only applicable to standard and pendant lamps
but to any kind of support composed of an inner and an outer tube or rod in a vertical
position and which it may be desirable to lengthen or shorten at pleasure.
Dah t
dow of Wahun 1980
For the Applicant,
W. E. GEDGE.
COMPLETE SPECIFICATION.
An Improved Adjustable Support for Lamps and other Articles.
I DANIEL COLEMAN DEFRIES, of 3 Fairfax Road, Hampstead N.W. Gentleman,
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:
This Invention relates to a device whereby the raising and lowering and adjustment
of the sliding rod or tube of a vertical standard or pendant support is greatly simplified,
and it consists essentially in the application of a loose ball or sphere to arrest by friction
the sliding movement, and of means whereby this stop is removed at pleasure.
I form or fit upon the outer-tube a recess, chamber, or box, open to the inner
concentric tube or rod on one side, one or more of the other sides or surfaces of the
box tapering downwards forming an incline to the bottom of the box, or the bottom.
part of the box being in any way formed of less area than its upper part. The
bottom of the box may be so made that it may be raised within the box by a lever or
otherwise, or I may provide a false bottom, which may be raised and lowered, or I may

page_text: fit a spring or springs upon the inside of the bottom of the box so that it may be
operated from the exterior. Upon this movable bottom or spring I place a ball
or sphere of such size that when upon its seat a portion of its periphery will project
through the opening in the box and touch the inner tube or rod.
On the accompanying Sheet of Drawing:-
Figure 1. represents an elevation of an Improved adjustable support of my
Invention as it would appear when lowered.
Figure 2. is a vertical section through the same but with lamp stand raised.
Figure 3. represents a similar section but with lamp stand lowered.
A is the outer tube.B the box. C the rod. D the incline. E the ball. F the
Lamp socket. G is the lever for operating ball E.
When it is desired to lengthen or to shorten the standard support, it is only
necessary to raise the ball E from its normal position at the bottom of the box or
recess B to the larger area at the upper part by the aid of the lever G operating on
the ball as shewn on Figure 3 (or upon a spring or movable bottom or otherwise)
to free the sliding rod or tube C, and when this is brought to the desired position,
the ball E being left free to run or fall to the bottom of its box B as at Figure 2 it
will prevent any further raising or lowering of the inner rod or tube ( by the friction
it will then exercise thereupon.
The box, chamber, or recess may he formed at any convenient point of the outer tube
and ny device will be found not only applicable to standard and pendant lamps but to
any kind of support composed of an inner and an outer tube or rod in a vertical
position and which it may be desirable to lengthen or shorten at pleasure.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In an adjustable support for Lamps and other articles formed of two concentric
tubes or of an outer tube and inner rod, the application of a ball or sphere to arrest
by its friction the descent of the inner tube, in combination with means of releasing
the inner tube, the whole arranged and working substantially as described.
2. An adjustable support for Lamps and other articles constructed, combined and
arranged to operate substantially as hereinbefore described and illustrated on the
accompanying Sheet of Drawing.
Dated this Twenty-first day of November 1889.