Improvements in Adjusting the Position of Sliding Tubes for Lamps and other Articles.
Year: 1889

page_text: Date of Application, 30th Jan., 1839
Complete Specification Left, 16th May, 1889-Accepted, 24th Aug.,
1889
Improvements in Adjusting the Position of Sliding Tubes for Lamps
and other Articles.
I FRANK EDWARD BEETON of 274 Goswell Road, London in the county of
Middlesex Secretary of a Public Company do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in the means whereby one tube sliding
within another may be adjusted to any position, and is applicable to Lamps, Music
Stands and Stools etc., etc.
To effect this object I fix near to the upper end or at any convenient part of the
inner tube marked A on the accompanying drawings an arrangement consisting of a
lever, ring or other suitable mechanism for lowering or pressing down a small rod,
working in the inner tube. At the lower end of the inner tube a cone is formed on
the tube or by means of a plug of metal or other suitable material (marked D on
drawing) which cone or plug is bored or left with a hole to allow of the small rod (C)
passing through. To any convenient part of the rod or to the lever or ring or other
arrangement which may be connected to the rod, is attached a spring the action of
which is to hold up the rod with the split plug below described.
To the small rod is loosely attached by means of a metal washer (screwed or other-
wise fastened on the rod) working in a groove therein a split plug, marked E on
drawing, which slides inside the outer tube, and is bored or hollowed out in the form
of a cone and preferably covered with indiarubber or other suitable material.
The action is as follows:—
The rod C with split plug E in loose connection therewith is held up on the cone or
plug D of the inner tube A by the spring before mentioned, it is then pressing against
the inside of the outer tube and the weight of the inner tube with its connections &c.
is employed according to the angle of the cones in forcing out the split plug and pre-
venting the inner tube from sliding down. To release the action the small rod passing
inside the inner tube is pressed down by means of the lever ring or other mechanism
when the split plug E is no longer forced against the outer tube and the inner tube is
free to slide.
The split plug may be bored or pressed in the form of a hollow cone and may work
with the upper plug turned in the form of a cone as is here particular described
and shown or the split plug may be bored out and may carry a small ring or one or
several projections against which the upper cone may work or the upper plug may
simply be rounded at the lower edge and may work against the hollow cone of the
split plug.
In the drawings herewith Fig. 1 shows the split plug E forced out against the side
of the outer tube B retaining it in its position whilst
Fig. 2. shows the rod C slightly pressed down leaving the split plug E free and
allowing the inner tube A to be moved up or down.
FRANK E. BEETON.
COMPLETE SPECIFICATION.
Improvements in Adjusting the Position of Sliding Tubes for Lamps
and other Articles.
I FRANK EDWARD BEETON of 274 Goswell Road London E.C. Secretary of a public
company 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 improvements in the means whereby one tube sliding

page_text: within another may be adjusted to any position and is applicable to lamps, music
stands & stools etc., etc.
To effect this object I affix near to the upper end or at any convenient part of the
inner tube marked "A" on the drawings left with the provisional specification an
arrangement consisting of a lever, ring, collar or other suitable mechanism for
lowering or pressing down a small rod working in the inner tube. At the lower end
of the inner tube a cone is formed on the tube or by means of a cone shaped plug of
metal, wood or other suitable material (cone marked D on drawings) inserted in end
of tube which cone or plug is bored or left with a hole of sufficient size to allow of a
small rod (C) working therein.
To any convenient part of the rod or to the lever, ring or other arrangement which
may be connected to the rod, is attached a spring, the action of which is to hold up,
with respect to the inner tube, the rod C with split plug below described.
To the small rod a plug (marked E on drawing) is loosely attached by means of a
washer (screwed or otherwise fastened on the rod) working in a groove therein, the
said plug being split into two halves. The split plug slides inside the outer tube and
is bored or hollowed out in the form of a cone and preferably covered outside with
indiarubber or other suitable substance to present a somewhat rough or dragging surface.
The action is as follows ;-
The rod C with split plug E in loose connection therewith is held up by the spring
before mentioned so that the inner surface of the split plug E bears upon the outer
surface of the cone or plug D formed at the lower end of the inner tube "A," the
outside surface of the split plug E then bears against the outer tube and the weight of
the inner tube with its connections etc. is employed according to the value of the angle
of the cones partly in forcing out the two halves of the split plug thus increasing the
friction between them and the outer tube and preventing the inner tube from sliding
down.
To release the action the small rod C is pressed down by means of the lever, ring
or other mechanism, when the split plug E is no longer forced against the outer tube
and the inner tube is free to slide.
The split plug may be bored conically or cast or pressed in a similar shape and may
work with the plug D turned in the form of a cone as is here particularly described
and shown or the split plug may be bored out and may carry a small ring or one or
several projections against which the upper cone may work or the upper plug may
simply be rounded at the lower edge and may work against the hollow cone surface of
the split plug.
In the drawings filed with the provisional specification Fig. I shows the split plug
forced against the outer tube, so retaining the inner tube in its position, and Fig. II
shows the rod C slightly pressed down leaving the split plug E free and allowing the
inner tube A to be moved up or down.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, 1 declare that what I
claim is
1. The employment of a plug or contrivance as in any of the forms described
capable of being made to bear, by means of a cone surface or surfaces, upon a part of
the surface of the lower tube or on guides, rests or rods provided for that purpose,
such plug or contrivance being actuated wholly or in part by the weight of the upper
tube and accessories substantially as described.
2. The employment of a similar contrivance but with its parts oppositely arranged,
that the clamping pressure may be exerted towards the centre instead of outwards
from the centre.
3. The combination of a rod, washer and groove, or other loose connection, with
the retaining contrivance, enabling the latter to be released substantially as described.
Dated this Sixteenth day of May 1889.
TD UNITZ ས
זמתתת
FRANK E. BEETON.